CN211375064U - tools for measuring - Google Patents

Abstract

Embodiments of the present disclosure provide tools for measurement. The tool includes: a line casting unit including a first laser emitting unit for projecting light based on the first laser; a distance measuring unit including a second laser emitting unit for measuring distance based on the second laser, the second laser being different a display unit for displaying data associated with at least one of the line casting unit and the distance measuring unit; and a power supply unit connected to the line casting unit, the distance measuring unit and the display unit for providing The line unit, ranging unit and display unit provide power. Embodiments of the present disclosure enable tools to both accurately measure ultra-long distances and cast lines.

Description

tools for measuring

technical field

The present disclosure relates to the measurement of length or distance, and more particularly, to a tool for measurement.

Background technique

Conventional tools for measuring include, for example, tape measures and laser rangefinders. Due to the limited length of the scale portion of the traditional tape measure, for example, it is usually 3 meters or 5 meters, it is difficult to measure super-long lengths or distances. In addition, in application scenarios such as engineering construction, it is often necessary to project a horizontal or plumb line on the target surface for orientation or positioning. However, although the traditional laser rangefinder can measure super-long length or distance, it cannot take into account the needs of projecting horizontal or plumb lines. A laser line projector is required to project horizontal or plumb lines. In turn, users need to carry a variety of different tools in application scenarios such as engineering construction.

Therefore, it is difficult for the traditional measurement tools to take into account both the accurate measurement of ultra-long distances and the casting of lines.

Utility model content

The present disclosure provides a tool for measuring, which can both accurately measure ultra-long distances and cast lines.

According to a first aspect of the present disclosure, there is provided a tool for measuring. The tool includes: a line casting unit including a first laser emitting unit for projecting light based on the first laser; a distance measuring unit including a second laser emitting unit for measuring distance based on the second laser, the second laser being different a display unit for displaying data associated with at least one of the line casting unit and the distance measuring unit; and a power supply unit connected to the line casting unit, the distance measuring unit and the display unit for providing The line unit, ranging unit and display unit provide power.

In some embodiments, wherein the ranging unit comprises: a second laser light receiving unit for detecting the reflected second laser light, the second laser light being transmitted by the second laser light emitting unit in response to the detection of the input signal of the start of ranging emission.

In some embodiments, the tool further comprises: an input device for acquiring the user's input signal; a casing for accommodating the line casting unit, the distance measuring unit and the power supply unit, and the display unit and the input device are arranged in the casing at the outer surface of the housing; and a support member provided below the housing for fixing the tool.

In some embodiments, the housing comprises: a first opening corresponding to the position of the optical element of the line casting unit; and a second opening corresponding to the emission window of the second laser emitting unit and the second opening The positions of the laser receiving windows of the laser receiving units correspond.

In some embodiments, the tool further includes: a processor connected to the input device, the line casting unit, the ranging unit, the power supply unit, and the display unit, for performing at least one of the following in response to detecting the operation input: based on an automatic The time interval from the emission of the second laser light to the detection of the reflected second laser light is used to determine the distance; and the first laser emission unit is triggered to emit the first laser light to project light in a predetermined manner.

In some embodiments, wherein the input device includes at least one of a key and a touch sensor of the display unit.

In some embodiments, the buttons include: a power-on button for turning on or off the electrical connection between the power supply unit and the casting unit, the distance measuring unit and the display unit; and a working mode button for the user to set the tool The working mode includes one of distance measurement, measurement area, measurement volume, measurement reference switching, measurement unit switching, and sound switch mode switching. Measurement reference switching includes switching the measurement reference of the distance measuring unit to the front side of the tool and One of the backside of the tool.

In some embodiments, the buttons further include: a clear button for clearing the current data of the tool; and a cast button for the user to trigger at least one input signal regarding the start of the cast and the selection of the cast mode.

In some embodiments, the processor is further configured to at least one of the following: based on the manner in which the power-on button is pressed, determine that the input signal is one of power-on, ranging start, single measurement, and continuous measurement; based on clearing The way the button is pressed determines that the input signal is one of clearing the current data of the tool, exiting the current measurement or casting the line without saving the current data, and shutting down; One of projecting vertical light, projecting horizontal light and vertical light; and determining the input signal as measuring distance, measuring area, measuring volume, measuring reference switching, measuring unit switching, sound switch mode switching based on the way the working mode button is pressed one of the.

In some embodiments, wherein the first opening has one of a circular channel and a cross channel.

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure.

Description of drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the more detailed description of the exemplary embodiments of the present disclosure, taken in conjunction with the accompanying drawings, wherein the same reference numerals generally refer to the exemplary embodiments of the present disclosure. same parts.

FIG. 1 shows a schematic diagram of a tool 100 for measurement according to an embodiment of the present disclosure;

FIG. 2 shows an exploded view of a tool 200 for measurement according to an embodiment of the present disclosure;

FIG. 3 shows a schematic diagram of a ranging system 300 according to an embodiment of the present disclosure; and

FIG. 4 shows a side view of a tool 400 for measuring according to an embodiment of the present disclosure.

In the various figures, the same or corresponding reference numerals designate the same or corresponding parts.

Detailed ways

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for the purpose of A more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes, and are not intended to limit the protection scope of the present disclosure.

In the description of embodiments of the present disclosure, the term "comprising" and the like should be understood as open-ended inclusion, ie, "including but not limited to". The term "based on" should be understood as "based at least in part on". The terms "one embodiment" or "the embodiment" should be understood to mean "at least one embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below. The terms "connected" and "connected" should be understood to cover fixed connection, detachable connection, integral connection, direct connection, indirect connection.

As described above, in the traditional solution for measurement, the traditional laser range finder can only measure the ultra-long length or distance that is difficult to measure with a tape measure, but cannot take into account requirements such as casting lines. In turn, users need to carry a variety of different tools in application scenarios such as engineering construction, which is very inconvenient.

To at least partially address one or more of the above-mentioned problems and other potential problems, example embodiments of the present disclosure propose a tool for measurement. The tool includes: a line casting unit including a first laser emitting unit for projecting light based on the first laser; a distance measuring unit including a second laser emitting unit for measuring distance based on the second laser, the second laser being different a display unit for displaying data associated with at least one of the line casting unit and the distance measuring unit; and a power supply unit connected to the line casting unit, the distance measuring unit and the display unit for providing The line unit, ranging unit and display unit provide power.

In the above solution, by configuring the wire casting unit based on the first laser in the tool to cast the wire, and configuring the distance measuring unit based on the second laser to measure the ultra-long distance, the tool for measuring can be used to measure the ultra-long distance. At the same time, it can also have the casting function. And by making the second laser different from the first laser, the measurement result of the distance measuring unit will not be disturbed by the projected laser.

FIG. 1 shows a schematic diagram of a tool 100 for measurement according to an embodiment of the present disclosure. As shown in FIG. 1 , the tool 100 for measurement includes: a line casting unit 120 , a distance measuring unit 130 , a display unit 160 and a power supply unit 140 . The line casting unit 120 includes a first laser emitting unit 122 for projecting light based on the first laser. The ranging unit 130 includes a second laser emitting unit 132 for measuring the distance based on the second laser, which is different from the first laser. The display unit 160 is configured to display data associated with at least one of the line casting unit 120 and the ranging unit 130 . This data is, for example and not limited to, the distance measured or the working mode of the casting unit 120 and the like. The power supply unit 140 is connected to the line casting unit 120 , the distance measuring unit 130 and the display unit 160 , and is used for providing power to the line casting unit 120 , the distance measuring unit 130 and the display unit 160 . In some embodiments, tool 100 also includes processor 150 and input device 170 . The processor 150 is connected with the input device 170 , the line casting unit 120 , the ranging unit 130 , the display unit 160 and the power supply unit 140 . The processor 150 is, for example, configured to perform at least one of the following in response to the detection of the operation input: determine the distance based on the time interval from the emission of the second laser light to the detection of the reflected second laser light; and trigger the first laser emission unit 122 to emit the first laser light. A laser that projects light in a predetermined manner. The predetermined method is, for example, a method of projecting a "one"-shaped laser line or a method of projecting a "cross"-shaped laser line.

Regarding the line casting unit 120 , in some embodiments, it includes a first laser emitting unit 122 (eg, but not limited to, a helium-neon laser), a prism light guide assembly 124 and a reference adjustment device 126 . The reference adjustment device 126 includes, for example, a pendulum. The prism light guide assembly 124 is, for example, a plurality of optical elements fixed on the pendulum body. The pendulum body is kept vertically downward under the influence of its own gravity, so that the fixed position of the prism light guide assembly 124 is kept absolutely vertical. The first laser beam emitted by the first laser emitting unit 122, for example, passes through the prism light guide assembly 124 to form a laser surface, so as to project horizontal and vertical laser lines for orientation or positioning. The plurality of optical elements fixed to the pendulum body include, for example, at least a first optical element and a second optical element that are relatively set at a predetermined angle (the predetermined angle is, for example, 90 degrees). For example, the first optical element is used to expand the exit angle range of the first laser beam emitted by the first laser emitting unit 122 to generate the first laser surface. For example, the first laser surface is a horizontal laser surface, and the horizontal laser surface emitted from the tool 100 projects a laser line with the word "one" on the target surface. The second optical element is used to expand the first laser beam emitted by the first laser emitting unit 112 to generate a second laser surface at a predetermined angle relative to the first laser surface. For example, if the first laser surface is a horizontal laser surface, and the second laser surface is a vertical laser surface, the horizontal laser surface and the vertical laser surface emitted by the tool 100 are projected on the target surface to form a "cross" laser line.

Regarding the distance measuring unit 130, it is used to measure the distance from the tool 100 to the target to be measured based on the second laser. In some embodiments, it includes, for example, a second laser emitting unit 132 and a second laser receiving unit 134 . The second laser emitting unit 132 is used for emitting the second laser light in response to the detection of the input signal of the start of ranging; the second laser light receiving unit 134 is used for detecting the reflected second laser light. In some embodiments, the ranging unit 130 further includes a timing unit for determining the time interval from the emission of the laser pulse to the detection of the laser pulse. The tool 100 determines the distance based on the time interval from the emission of the second laser light to the detection of the reflected second laser light. In some embodiments, the tool 100 determines the distance between the ranging unit 130 and the target to be measured based on the phase delay produced by the modulated laser beam going back and forth between the ranging unit and the target to be measured once and the wavelength of the modulated laser light.

Regarding the power supply unit 140, in some embodiments, it is, for example and not limited to, a battery, which is connected to the line casting unit 120, the ranging unit 130, the processor 150, the display unit 160 and the input unit 170, so as to provide power to the above-mentioned units . In some embodiments, the power supply unit 140 may be a rechargeable lithium battery. In some embodiments, the power supply unit 140 may be powered by an external power source.

The input device 170 is used to obtain the user's input signal. In some embodiments, the input device includes at least one of a key and a touch sensor of the display unit. In some embodiments, the input device 170 includes, for example, a plurality of keys. The plurality of buttons include, for example, a power-on button and a working mode button. The power-on button is used to turn on or off the electrical connection between the power supply unit 140 and the line casting unit 120 , the distance measuring unit 130 and the display unit 160 . The working mode button is used for the user to select the working mode of the tool. The working mode includes one of measuring distance, measuring area, measuring volume, measuring reference switching, and sound mode. The measurement reference switching includes switching the measurement reference of the ranging unit to one of the tool front side and the tool rear side. In some embodiments, the keys further include: a clear key and a cast key. The clear button is used to clear the current data of the tool. The casting button is used for the user to trigger an input signal regarding at least one of casting start and casting mode selection.

Regarding the processor 150 , in some embodiments, it is connected to the input device 170 , the line casting unit 120 , the ranging unit 130 , the display unit 160 and the power supply unit 140 . In some embodiments, the processor is further configured to at least one of the following: based on the manner in which the power-on button is pressed, determine that the input signal is one of power-on, ranging start, single measurement, and continuous measurement; based on the clear button The method of being pressed determines that the input signal is one of clearing the current data of the tool, exiting the current measurement or casting the line without saving the current data, and shutting down; One of vertical light, projected horizontal and vertical light; and based on the way the working mode button is pressed, determine the input signal as measuring distance, measuring area, measuring volume, measuring reference switching, measuring unit switching, sound switch mode switching an item.

In the above solution, by arranging in the tool a line casting unit that casts lines based on the first laser and a distance measuring unit that measures the ultra-long distance based on the second laser, the tool for measuring can be used for measuring the ultra-long distance. At the same time, it can also take into account the casting line. In addition, by making the second laser light different from the first laser light, the measurement result of the distance measuring unit can be prevented from being disturbed by the laser light projected by the projection unit.

In some embodiments, the first laser is, for example, a green laser, and the second laser is, for example, a red laser. By making the laser line projected by the line casting unit to be a green laser, the recognizability of the laser line projected by the tool is high even in the case of strong ambient light. The photodetector in the second laser light receiving unit of the ranging unit 130 is not sensitive to green laser light. The reflected red laser light will not be accurately detected by the photodetector in the second laser light receiving unit of the ranging unit 130 due to the green laser light projected by the line casting unit 120 .

The specific structure of the measurement tool according to the embodiment of the present disclosure will be described below with reference to FIG. 2 . FIG. 2 shows an exploded view of a tool 200 for measuring according to an embodiment of the present disclosure. As shown in FIG. 2 , the tool 200 includes: a display unit 210 , an input device 222 , a housing 220 , a ranging unit 230 , a line casting unit 240 , a battery 250 , an exit window assembly 252 , a slider 224 , a charging assembly 262 , and a support 270.

The housing 220 is used for accommodating components such as the distance measuring unit 230 , the casting unit 240 , the power supply unit (eg, the battery 250 ) and the like, as well as the display unit 210 , the input unit 222 , the slider 224 and the like. In some embodiments, the display unit 210 and the input device 222 are disposed at the outer surface of the housing 220, eg, the upper surface. In some embodiments, the housing 220 includes an upper housing portion 226 for housing the ranging unit 230 and a lower housing portion 228 for housing the line casting unit 240 . In some embodiments, the housing 220 includes a first opening and a second opening, the first opening corresponds to the position of the optical element of the line casting unit 240 ; and a second opening, the second opening corresponds to the emission of the second laser emitting unit The window corresponds to the position of the laser receiving window of the second laser receiving unit. The first opening is provided, for example, on the front side (eg, the side facing the target surface) of the lower housing portion 228 . The second opening is provided, for example, on the front side (eg, the side facing the target surface) of the housing upper portion 226 .

A coupling portion 224 is provided at the first opening of the front side (eg, the side facing the target surface) of the lower casing portion 228 for coupling with the exit window assembly 252 so that the exit window assembly 252 is fixed on the casing lower portion 228 The front side of the line-casting unit 240 further corresponds to the position of the optical element included in the prism light guide assembly of the line-casting unit 240 , so as to provide a passage for the first laser light emitted by the line-casting unit 240 . At the rear side (the side facing away from the coupling portion 224 ) of the housing lower portion 228 , a battery accommodating portion 225 is provided for accommodating the battery 250 . An anti-slip structure 227 is provided on the outer surface of the battery accommodating portion 225 so as to facilitate the hand-holding of the tool 200 . The anti-slip structure 227 is, for example, a plurality of anti-slip protrusions provided on the outer surface of the battery accommodating portion 225 .

In some embodiments, the upper surface of the housing upper portion 226 is provided with the display unit 210 and the input device 222 . The input device 222 is provided adjacent to the display unit 210 . In some embodiments, the input device 222 and the display unit 210 may be integrated into a touch-sensitive display screen.

Regarding the line casting unit 240, in some embodiments, it includes a plurality of first laser emitting units (for example, including: a horizontal first laser emitting unit and a vertical first laser emitting unit), a plurality of optical elements 244, and a reference adjustment device , circuit board 242 . The reference adjustment device includes, for example, a pendulum body 246 . A plurality of optical elements 244 are disposed on a side of the line casting unit 240 adjacent to the exit window assembly 252 and are configured to be fixed relative to the pendulum body 246 . The pendulum 246 has, for example, a lower free end. The pendulum body 246 is kept vertically downward under the influence of its own gravity, so that the fixed positions of the plurality of optical elements 244 are kept at an absolute vertical or an absolute level.

The plurality of optical elements 244 include, for example, at least a first optical element and a second optical element which are disposed relative to each other at a predetermined angle (the predetermined angle is, for example, 90 degrees). For example, the first optical element is used to expand the exit angle range of the first laser beam emitted by the first laser emitting unit to generate the first laser surface. For example, the first laser surface is a horizontal laser surface. The second optical element is used to expand the first laser beam emitted by the first laser emitting unit to generate a second laser surface with a predetermined angle relative to the first laser surface. For example, the first laser surface is a horizontal laser surface, and the second laser surface is a vertical laser surface. In some embodiments, the first optical element for generating the first laser surface and the second optical element for generating the second laser surface are integrated and used together to extend the same first laser emitting unit for use in Project a "cross" laser line. In the above solution, the first optical element and the second optical element are integrated and used to expand the laser beam emitted by the same first laser emitting unit, which is beneficial to make the structure of the tool 200 compact. In some embodiments, the first optical element for generating the first laser surface is used to expand the horizontal first laser beam emitted by the horizontal first laser emitting unit, and the second optical element for generating the second laser surface is used for The vertical first laser beam emitted by the vertical first laser emitting unit is extended for projecting a "cross"-shaped laser line. In the above solution, by using the first optical element and the second optical element to expand the horizontal first laser beam and the vertical first laser beam respectively, it is beneficial to control the tool 200 in: projecting the horizontal "one" character laser line, projecting the vertical first laser beam Switch between the "one" laser line or the "ten" laser line projection.

Regarding the circuit board 242, in some embodiments, it is configured with a processor (not shown), for example, when the circuit board 242 is configured to detect the input signal of the "one" word laser line casting method, the trigger level is the first The laser emitting unit emits the first laser light. The first laser is generated into a horizontal first laser surface through the first optical element, and then through the exit window assembly 252 to project a horizontal "one" laser line. For example, the circuit board 242 is further configured to trigger the horizontal first laser emitting unit and the vertical first laser emitting unit to emit the horizontal first laser beam, the vertical first laser first laser beam. The two first laser beams are respectively expanded through the first optical element and the second optical element to generate a horizontal first laser surface and a vertical first laser surface, and then pass through the exit window assembly 252 to project a "cross" laser line.

In some embodiments, the tool 200 also includes a locking device. In some embodiments, the locking device includes a sliding block 224 disposed on the outer surface of the lower portion 228 of the housing and a locking mechanism 248 coupled and interlocking with the sliding block. The slider 224 includes, for example, a locked position and an unlocked position. The pendulum body 246 of the line casting unit 240 is locked by the locking mechanism 248 when the slider 224 is in the locked position. The locking mechanism 248 is, for example and not limited to, a clamping device surrounding the lower free end of the pendulum body 246, when the slider 224 is in the locked position, the clamping device clamps the enclosed lower free end of the pendulum body 246, thereby making the pendulum body 246 free. 246 is fixed relative to the locking mechanism 248 and is no longer affected by its own gravity and remains vertically downward. When the slider 224 is in the unlocked position, the pendulum body 246 is released by the locking mechanism 248, and the pendulum body 246 is kept vertically downward under the influence of its own gravity. At this time, when the tool 200 is tilted not more than a predetermined threshold (eg, 4 degrees), the horizontal laser plane projected by the wire casting unit 240 can still maintain a horizontal direction.

Regarding the input device 222 , in some embodiments, the input device 222 includes: a power-on button or a measurement button 221 , a work mode button 223 , a clear button 227 and a cast button 229 .

Regarding the power-on button or the measurement button 221, in some embodiments, the processor is further configured to determine that the user's input signal is power-on, ranging start, single measurement, continuous measurement based on the manner in which the power-on button or the measurement button 221 is pressed one of them. For example, when the tool 200 is turned off, short press the power button or the measurement button 221, and the tool 200 enters the measurement mode. In the measurement mode, short press the power button or the measurement button 221, the tool 200 enters the single measurement mode. Long press (for example, pressing for more than 3 seconds) the power-on button or the measurement button 223, and the tool 200 enters the single measurement mode.

Regarding the working mode button 223, in some embodiments, the processor may be further configured to determine that the input signal is a measurement distance, a measurement area, a measurement volume, a front-to-back measurement reference switch, and a measurement unit switch based on the manner in which the work mode button 223 is pressed. , one of the sound switch mode switching. For example, when the tool 200 enters the measurement mode, short press the working mode button 223, the tool 200 switches from the distance measurement mode to the area and volume measurement mode. And long pressing (for example, pressing for more than 3 seconds) the working mode button 223, the tool 200 switches to the working mode setting mode. When the tool 200 enters the work mode setting mode, short press the work mode button 223, and then press the power button or the measurement button 221, the tool 200 switches between the front and back measurement benchmarks. Short press the working mode button 223 for the second time, and then press the power-on button or the measurement button 221, the tool 200 switches the measurement unit. Short press the working mode button 223 for the third time, and then press the power-on button or the measurement button 221, the tool 200 switches the sound switch mode. In some embodiments, the tool 200 emits an alert sound when the sound switch mode is switched on, when taking a measurement or when casting a line.

Regarding the clear button 227, in some embodiments, the processor may be further configured to, based on the manner in which the clear button 227 is pressed, determine that the input signal is to clear the current data of the tool, to exit the current measurement or casting state without saving the current data, to power off one of them. For example, in the measurement state, short press the clear button 227, and the tool 200 clears the current data. When the tool 200 is switched to the working mode setting mode, and the clear button 227 is pressed briefly, the tool 200 does not save the current data and exits the current measurement or line casting state. In the power-on state, long press the clear button 227, and the tool 200 is turned off.

Regarding the line-casting button 229, in some embodiments, the processor may also be configured to, based on the manner in which the line-casting button 229 is pressed, determine that the input signal is to project horizontal light (ie horizontal "one" laser line), project vertical light One of the straight line (ie vertical "one" laser line), horizontal and vertical projection (ie "cross" laser line), closed line, and pulse line. For example, short press the line-casting button 229, the tool 200 enters the cycle to select the horizontal light (ie horizontal "one" laser line), the vertical light (ie vertical "one" laser line), the horizontal and vertical light (ie "X" laser line), close the casting line. Long press the casting button 226, and the tool 200 enters the pulse casting mode.

Regarding the support member 270 , it is provided below the housing 220 for fixing the tool 200 . The charging assembly 262 is used to realize the electrical connection between the battery 250 and an external power source, so as to charge the battery 250 .

Regarding the ranging unit 230, in some embodiments, it includes, for example, a second laser emitting unit and a second laser receiving unit. The second laser emission unit includes, for example, a laser diode, an emission drive circuit, and a laser emission window. The laser receiving unit includes, for example, a laser detection element and a laser receiving window. The laser diode emits, for example, a red second laser light.

The ranging manner of the ranging unit is described below with reference to FIG. 3 . FIG. 3 shows a schematic diagram of a ranging system 300 according to an embodiment of the present disclosure. As shown in FIG. 3 , the ranging system 300 includes a target to be measured 360 , a ranging unit 310 , a processor 350 and an input device 370 . The ranging unit 310 further includes: a second laser emitting unit 320 and a second laser receiving unit 330 . In some embodiments, ranging system 300 is, for example, a phased laser ranging system. For example, the second laser emitting unit 320 continuously emits a laser beam with a modulated signal, and measures the phase delay generated by the modulated laser beam going back and forth between the targets to be measured 360 of the ranging unit 310 once, and then according to the wavelength of the modulated laser, Scale the distance represented by this phase delay. The processor 350 calculates the first distance based on the following formula (1), for example.

代表激光束在测量工具302与待测目标360之间往返一次产生的总的相位延迟。ω代表调制信号的角频率，ω＝2πf。f代表调制频率。

代表激光束在测量工具302与待测目标360之间往返一次所产生相位延迟中不足半波长的部分。N代表激光束在测量工具302与待测目标360之间往返一次所包含调制半波长个数。In the above formula (1), D represents the distance from the ranging unit 310 to the target 360 to be measured. V represents the speed at which the laser pulse travels in air. T represents the time from the emission of the laser beam to the detection of the laser pulse by the laser receiving unit.

Represents the total phase delay produced by the laser beam making one round trip between the measurement tool 302 and the object to be measured 360 . ω represents the angular frequency of the modulating signal, ω=2πf. f represents the modulation frequency.

It represents the part of less than half wavelength of the phase delay generated by the laser beam going back and forth between the measuring tool 302 and the object to be measured 360 once. N represents the number of modulation half-wavelengths included in one round trip of the laser beam between the measuring tool 302 and the object to be measured 360 .

In some embodiments, the measurement method of the ranging system 300 is, for example, when the processor 350 detects a ranging start input signal input by the user via the input device 370, triggering the second laser emitting unit 320 to continuously emit the modulated signal. The laser beam, which is emitted from the laser emission window, passes through the distance D to be measured, and is reflected by the target to be measured 360. The reflected laser beam passes through the laser receiving window and is detected by the photodetector (such as a laser beam) of the second laser receiving unit 330. detection element) detected. According to the above formula (1), based on the phase delay between the laser emission and the reflected laser beam detected by the laser detection element, and then based on the wavelength of the modulated light and the angular frequency of the modulated signal, the processor determines from the laser emission to the return photoelectric The detector detects the time interval T between the reflected laser pulses, and then calculates the distance D from the ranging unit 310 to the target to be measured 360 .

The above-mentioned time interval T can be obtained in various ways. In some embodiments, the time interval T from the emission of the laser light to the detection of the reflected laser pulse by the laser detection element may be calculated by a separate timing circuit. In some embodiments, the processor 350 records the time T1 of transmitting the laser pulse in response to detecting that the user presses the ranging start button; and then records the receiving time T2 in response to the laser detection element detecting the reflected laser pulse, and then based on The above-mentioned time interval T between the transmitting time T1 and the receiving time T2 is used to determine the distance D from the ranging unit 310 to the target to be measured 360 .

FIG. 4 shows a side view of a tool 400 for measuring according to an embodiment of the present disclosure. As shown in FIG. 4 , a second laser emitting window 430 , a second laser receiving window 420 and a first opening 440 for first laser emitting are provided on the front side of the housing 410 (the side adjacent to the target to be measured). In some embodiments, the first opening has one of a circular channel and a cross channel. For example, as shown in the left portion of FIG. 4 , the first opening has a circular channel 442 . As shown in the right part of FIG. 4 , the first opening has a cross channel 442 .

Various embodiments of the present disclosure have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure should be included within the protection scope of the present disclosure.

Claims (10)

1. A tool for measuring, characterized in that the tool comprises: a line casting unit, including a first laser emitting unit for projecting light based on the first laser; a distance measuring unit including a second laser emitting unit for measuring distance based on a second laser, the second laser being different from the first laser; a display unit for displaying data associated with at least one of the line casting unit and the ranging unit; and A power supply unit is connected to the line casting unit, the distance measuring unit and the display unit, and is used for providing power to the line casting unit, the distance measuring unit and the display unit. 2. The tool according to claim 1, wherein the ranging unit further comprises: The second laser light receiving unit is used for detecting the reflected second laser light, and the second laser light is emitted by the second laser light emitting unit in response to the detection of the input signal of the start of ranging. 3. The tool of claim 2, wherein the tool further comprises: an input device for acquiring a user's input signal; a casing for accommodating the line casting unit, the distance measuring unit and the power supply unit, the display unit and the input device are provided at an outer surface of the casing; and A support is arranged below the housing for fixing the tool. 4. The tool of claim 3, wherein the housing comprises: a first opening corresponding to the position of the optical element of the line casting unit; and The second opening corresponds to the positions of the emission window of the second laser emitting unit and the laser receiving window of the second laser receiving unit. 5. The tool of claim 3, wherein the tool further comprises: a processor, connected to the input device, the line casting unit, the ranging unit, the power supply unit and the display unit, and configured to perform at least one of the following in response to detecting a user's input signal: determining the distance based on the time interval from the emission of the second laser light to the detection of the reflected second laser light; and Trigger the first laser emitting unit to emit the first laser to project the light in a predetermined manner. 6. The tool of claim 5, wherein the input device comprises at least one of a key and a touch sensor of the display unit. 7. The tool of claim 6, wherein the button comprises: a power-on button for turning on or off the electrical connection between the power supply unit and the line casting unit, the ranging unit and the display unit; and The working mode button is used for the user to set the working mode of the tool. The reference switching includes switching the measurement reference of the ranging unit to one of the tool front side and the tool rear side. 8. The tool of claim 7, wherein the key further comprises: a clear button for clearing the current data of the tool; and The line-casting button is used for the user to trigger at least one input signal of line-casting start and line-casting mode selection. 9. The tool of claim 8, wherein the processor is further configured for at least one of the following: Based on the manner in which the power-on button is pressed, determine that the input signal is one of power-on, ranging start, single measurement, and continuous measurement; Based on the manner in which the clear button is pressed, it is determined that the input signal is one of clearing the current data of the tool, exiting the current measurement or casting state without saving the current data, and shutting down; Based on the manner in which the line casting button is pressed, determining that the input signal is one of projecting horizontal light, projecting vertical light, and projecting horizontal and vertical light; and Based on the way in which the working mode button is pressed, it is determined that the input signal is one of measurement distance, measurement area, measurement volume, measurement reference switching, measurement unit switching, and sound switch mode switching. 10. The tool of claim 4, wherein the first opening has one of a circular channel and a cross channel.

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