CN210680398U - Pointer instrument and combination instrument - Google Patents
Pointer instrument and combination instrument Download PDFInfo
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- CN210680398U CN210680398U CN201920574181.7U CN201920574181U CN210680398U CN 210680398 U CN210680398 U CN 210680398U CN 201920574181 U CN201920574181 U CN 201920574181U CN 210680398 U CN210680398 U CN 210680398U
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- pointer
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- pointer instrument
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- 238000001514 detection method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model provides a pointer instrument, including pointer, dial plate, leaded light support, PCB board, step motor and controller, step motor is used for the drive pointer rotatory, between dial plate and the leaded light support, is provided with a plurality of detecting element for detect the pointer and stop or pass through the position that detecting element located, if the pointer is rotatory to the target location from the current position, detecting element's testing result is inconsistent with expectation, confirms that the pointer appears losing the step problem. If the pointer has the step loss problem, the controller controls the stepping motor to enable the pointer to return to zero and be repositioned. The utility model provides a combination meter. The utility model provides a pointer instrument and combination meter through setting up the detecting element, can in time discover that the pointer appears losing the step to guarantee that the pointer instrument is accurate to instruct.
Description
Technical Field
The utility model relates to the field of automobiles, concretely relates to pointer instrument and combination meter.
Background
The current pointer instrument is driven by a stepping motor, the forward rotation or the reverse rotation of the stepping motor is determined by the positive and negative difference between the target step number and the current step number of the motor, a motor manager accumulates the current step number to the target step number or reduces the target step number, and the rotor rotates by sending a PWM signal to control the energization sequence of a winding, so that a rotating shaft is driven to rotate, and a pointer fixed on the rotating shaft rotates to a target position from the current position.
When a PWM signal is sent from the current position indication to the target position, if the problems that the contact between the stepping motor and the PCB is poor or the pointer is blocked by external force and the like occur, the pointer does not rotate to the target position, and pointer indication deviation (namely step loss) occurs.
The motor manager does not know that the pointer loses steps, and still accumulates or subtracts the number of the target steps according to the previous target position to reach a new target position, the pointer indication still has deviation, and the problem of pointer indication step loss continues to occur, so that the pointer instrument indication is inaccurate.
Disclosure of Invention
To the problem that exists among the prior art, the to-be-solved problem of the utility model is to provide a pointer instrument, through setting up detecting element, can in time discover that the pointer appears losing the step to guarantee that the pointer instrument indicates accurately.
The utility model provides a pointer instrument, including pointer, dial plate, leaded light support, PCB board, step motor and controller, step motor is used for the drive pointer rotatory, between dial plate and the leaded light support, is provided with a plurality of detecting element for detect the pointer and stop or pass through the position that detecting element located, if the pointer is rotatory to the target location from the current position, detecting element's testing result is inconsistent with expectation, confirms that the pointer appears losing the step problem.
Further, the detection unit is arranged at the scales on the dial.
Further, the face of the pointer tip facing the dial can reflect light.
Furthermore, a reflecting surface, a reflecting coating or a pointer tip is arranged on the surface of the pointer tip facing the dial plate and is made of flat reflecting materials.
Further, the detection unit comprises a transmitting unit and a receiving unit for transmitting and receiving light invisible to human eyes.
Further, the light invisible to the human eye is infrared light.
Further, the controller controls the transmitting unit arranged at the position where the pointer is expected to pass through the scale to work; if the receiving unit receives the invisible light with the signal intensity being larger than or equal to the set threshold value, the detection result is consistent with the expectation, and the pointer rotates normally; otherwise, the pointer has a step loss problem.
Further, the controller can set a set threshold of the receiving unit to prevent interference of other stray light.
Further, if the pointer has a step loss problem, the controller controls the stepping motor to enable the pointer to return to zero and be repositioned.
The utility model also provides a combination meter, including foretell pointer instrument.
Compared with the prior art, the utility model provides a pointer instrument and combination meter has following beneficial effect: through setting up the detecting element, can in time discover that the pointer loses the step to guarantee that the pointer instrument is accurate to instruct.
Drawings
FIG. 1 is a schematic view of a pointer instrument of one embodiment of the present invention;
FIG. 2 is a schematic view of a pointer instrument transmitting unit of the present invention;
fig. 3 is a schematic view of the pointer instrument receiving unit of the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a pointer instrument of an embodiment, for example for the tachometer, including pointer 3, dial plate 4, leaded light support, PCB board, step motor and controller, step motor is used for driving pointer 3 rotatory, between dial plate 4 and the leaded light support, is provided with a plurality of detecting element for detect the pointer stop or pass through the position that detecting element located.
In this embodiment, the detecting unit includes a transmitting unit 51 and a receiving unit 52, and is used for transmitting and receiving light invisible to human eyes, such as infrared light, which is harmless to human body and invisible to human eyes, and does not interfere with the line of sight of the driver.
The detection unit is arranged at a scale on the dial 4, the dial 4 being transparent at the scale, the detection unit arranged here in this embodiment being able to emit and receive infrared light.
The face of the pointer tip 31 facing the dial 4 can reflect light.
Specifically, the face of the pointer tip 31 facing the dial is provided with a light reflecting face, such as a mirror face; or the surface of the pointer tip 31 facing the dial is provided with a reflective coating; or the pointer tip is made of flat reflecting materials. In the present embodiment, a reflective coating is used, so that the pointer tip 31 can reflect the infrared light emitted by the infrared light emitting unit 51, so that the receiving unit 52 receives the corresponding infrared light, and whether the pointer is above the scale is determined by setting a received light intensity threshold.
As shown in fig. 2, the emitting unit 51 includes a light emitting diode LED and a transistor Q, and is connected to an output port of the controller, and the pulse width modulation PWM signal from the controller controls the emitting unit 51 to operate and emit infrared light.
The receiving unit 52 includes an infrared photodiode L and a comparator, an output of the comparator is connected to an input port of the controller, a non-inverting input terminal of the comparator is connected to an anode of the infrared photodiode L, an inverting input terminal of the comparator is connected to a sliding terminal of a variable resistor R, the variable resistor R is used for setting a threshold, and if the intensity of the infrared light signal received by the infrared photodiode L is greater than or equal to the set threshold, an output signal Vout is output to the input port of the controller.
The controller can set a set threshold of the receiving unit to prevent interference from other stray light.
If the rotating speed is 1400 rpm, the current position of the pointer 3 of the tachometer is located between the scale (1) and the scale (2) and points to 1.4 because the reading of the tachometer is scale value 1000. At this time, if the rotation speed becomes 2600 rpm, the target position of the indicating needle 3 is 2.6, and during the rotation of the indicating needle 3, it is expected to pass through the scale (2):
the controller controls the operation of the emitting unit 51 set at the desired scale (2);
if the receiving unit 52 receives infrared light, i.e. the detection result is consistent with the expectation, the pointer rotates normally; if the receiving unit 52 does not receive the infrared light, the pointer has a step loss problem.
If the rotating speed value is changed greatly, the corresponding detection units are expected to work through a plurality of scales, such as the scale (2), the scale (3) and the like, if the receiving units in the detection units receive infrared light, the pointer rotates normally, otherwise, the pointer has a step loss problem.
If the pointer 3 has the step loss problem, the controller controls the stepping motor to enable the pointer to return to zero and be repositioned.
The pointer meter in the present embodiment may be included in a combination meter.
Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited thereto. Various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is to be determined by the appended claims.
Claims (9)
1. The pointer instrument is characterized in that a plurality of detection units are arranged between the dial plate and the light guide support and used for detecting the position where the pointer stays or passes through the detection units, if the pointer rotates to a target position from the current position, the detection result of the detection units is inconsistent with the expectation, and the problem of missing steps of the pointer is determined.
2. The pointer instrument as claimed in claim 1, characterized in that the detecting unit is provided at a scale on the dial plate.
3. A pointer instrument as claimed in claim 2, characterized in that the pointer tip is light-reflective towards the dial face.
4. The indicating instrument of claim 3 wherein the face of the pointer tip facing the dial is provided with a light reflecting face, a light reflecting coating or the pointer tip is made of a flat light reflecting material.
5. The pointer instrument as claimed in claim 1, characterized in that the detection unit comprises a transmitting unit and a receiving unit for transmitting and receiving light invisible to the human eye.
6. A pointer instrument as claimed in claim 5, characterized in that the light invisible to the human eye is infrared light.
7. The pointer instrument as claimed in claim 5, wherein the controller controls the operation of the transmitting unit provided where the pointer is expected to pass through the scale.
8. A pointer instrument as claimed in claim 7, characterized in that the controller is able to set a set threshold value of the receiving unit to prevent interference by other stray light.
9. A combination meter, characterized in that it comprises a pointer meter according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920574181.7U CN210680398U (en) | 2019-04-25 | 2019-04-25 | Pointer instrument and combination instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920574181.7U CN210680398U (en) | 2019-04-25 | 2019-04-25 | Pointer instrument and combination instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210680398U true CN210680398U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920574181.7U Active CN210680398U (en) | 2019-04-25 | 2019-04-25 | Pointer instrument and combination instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210680398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114120753A (en) * | 2020-08-27 | 2022-03-01 | 上海航空电器有限公司 | A pointer closed-loop drive simulation instrument in a flight simulator |
-
2019
- 2019-04-25 CN CN201920574181.7U patent/CN210680398U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114120753A (en) * | 2020-08-27 | 2022-03-01 | 上海航空电器有限公司 | A pointer closed-loop drive simulation instrument in a flight simulator |
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