CN114428058B - Corn moisture content detector - Google Patents

Abstract

The invention discloses a handheld water content detector, which comprises a detector shell, a control device and a rubber sealing cylinder, wherein: the detector casing is two open-ended tube-shape, and controlling means main part detachable inserts in the detector casing, and controlling means encapsulates has spectrum sensor and singlechip, and rubber seal tube detachable installs at the casing head. According to the corn moisture content detector, corn threshing is not needed, and moisture content measurement can be carried out on corn on plants in a field growing period.

Description

A corn moisture content detector

Technical Field

The invention belongs to the field of detection technology, and in particular relates to a corn moisture content detector.

Background technique

Corn is one of the important crops in the northern region. In recent years, with the improvement of agricultural mechanization and the continuous increase in corn planting area, combine harvesters are increasingly used in corn grain harvesting. The technical conditions for corn harvesting machinery stipulate that the moisture content of corn grains suitable for direct threshing and harvesting is 15% to 25%. It can be seen that the moisture content of corn grains is one of the important factors affecting corn harvest yield. Therefore, measuring the moisture content of corn grains before harvesting is of great significance to increasing corn crop yield, reducing the breakage rate, and reducing the loss rate.

At present, most methods for detecting moisture content in corn kernels require threshing of corn and use the capacitance method to measure based on dielectric properties. This method is cumbersome to operate, takes a long time to measure, and has a hysteresis in the results. If the moisture content measurement error is large, it will lead to serious losses in corn harvest.

To this end, the present invention discloses a corn moisture content detector, which can measure the moisture content of corn on plants during the field growth period without threshing the corn.

Summary of the invention

In order to achieve the purpose of the present invention, the following technical solutions are adopted:

A handheld moisture content detector comprises a detector housing, a control device and a rubber sealing tube, wherein the detector housing is in the shape of a tube with openings at both ends, the control device body is detachably inserted into the detector housing, the control device is encapsulated with a spectral sensor and a single-chip microcomputer, and the rubber sealing tube is detachably installed on the housing head.

The handheld moisture content detector, wherein: the spectral sensor includes a spectral sensor probe, a light source, a filter, a filter, a photoelectric sensor and a power supply module, the filter is installed on the top of the shell head, the spectral sensor probe and the light source are installed at the bottom of the filter, the filter is used to transmit the reflected light waves, the spectral sensor probe is used to convert the light waves into light intensity signals, the photoelectric sensor is used to convert the light intensity signals into voltage signals, and the filter is used to amplify and filter the voltage signals.

The handheld moisture content detector, wherein: the single chip microcomputer includes an AD conversion module, a Bluetooth transmission module, a power module and a data processing module, wherein the power module supplies power to the single chip microcomputer, the AD conversion module is used to convert the electrical signal transmitted by the spectral sensor into a digital signal, the Bluetooth module is used to wirelessly transmit the measurement data of the spectral sensor converted by the AD conversion module to the host computer, and the data processing module is used to perform signal analysis and processing on the received electrical signal to establish a model between the voltage signal and the moisture content of corn.

The handheld moisture content detector comprises: a plurality of short openings are evenly arranged on the edge of the sealing tube.

The handheld moisture content detector comprises two small fixed bosses on the control device body, two fixed openings on the shell, and after the control device is inserted into the shell, the two fixed bosses extend out from the two openings respectively.

The handheld moisture content detector comprises two sheet-like tail wings at the rear of the shell, and each tail wing has a slot.

A whole fruit moisture content detection device comprises a shell, a moisture content detection device body, a shell and a handheld moisture content detector, characterized in that: the handheld moisture content detector is a handheld moisture content detector as described above, the handheld moisture content detector is installed on the moisture content detection device body, and the moisture content detection device body is installed in the shell.

The whole fruit moisture content detection device, wherein: the whole fruit moisture content detection device body includes a lateral displacement mechanism, a longitudinal displacement mechanism, a circumferential rotation mechanism, a left mounting frame and a right mounting frame, the lateral displacement mechanism is installed on the longitudinal displacement mechanism, the longitudinal displacement mechanism is installed on the circumferential rotation mechanism, the circumferential rotation mechanism is installed on the left mounting frame and the right mounting frame; the handheld moisture content detector is installed on the lateral displacement mechanism.

The whole fruit moisture content detection device, wherein: the lateral displacement mechanism includes a lateral drive motor, a lateral drive motor bracket, a coupling, a lateral lead screw and a lateral slider; the handheld moisture content detector is installed on the lateral lead screw, the lateral lead screw is arranged horizontally, the lateral slider is movably installed on the lateral lead screw, the lateral drive motor is installed on the lateral drive motor bracket, and the lateral drive motor is connected to the first end of the lateral lead screw through a coupling.

The whole fruit moisture content detection device, wherein: an elastic clip is provided at the lower part of the horizontal slider, the clip is a door-shaped structure, including a clip beam and clamping plates on both sides of the beam, the distance between the two clamping plates is slightly larger than the distance between the two sheet-like tail wings at the rear of the handheld moisture content detector shell; the card slot of the handheld moisture content detector is installed on the card clip.

The whole fruit moisture content detection device, wherein: the longitudinal displacement mechanism includes a longitudinal drive motor, a longitudinal drive motor bracket, a bevel gear, a longitudinal lead screw, a longitudinal drive end slider and a longitudinal drive end bearing seat, wherein the longitudinal drive motor is installed on the longitudinal drive motor bracket and is located on the upper part of the transverse drive motor, the longitudinal drive motor bracket is installed on the rotating drive end disc, the axis of the longitudinal drive motor is vertical to the axis of the transverse lead screw; the longitudinal drive motor shaft is installed with a bevel gear, which meshes with the bevel gear installed on the top of the longitudinal lead screw; the upper part of the longitudinal lead screw is connected to the bevel gear, and the lower part is connected to the longitudinal drive end bearing seat, and the longitudinal drive end bearing seat is installed on the rotating drive end disc; the longitudinal slider drive end is movable The longitudinal slider is movably installed on the longitudinal screw, and the driving end of the longitudinal slider is connected to the transverse driving motor bracket; the longitudinal displacement mechanism also includes a longitudinal coupling, a longitudinal support end slider, a longitudinal support end screw, a longitudinal support end screw bearing seat, a longitudinal support end motor, and a longitudinal support end motor bracket. One end of the longitudinal support end screw is connected to the longitudinal support end motor through a coupling, and the longitudinal support end motor is fixed to the rotating support end disc through the longitudinal support end motor bracket. The other end of the longitudinal support end screw is fixed to the rotating support end disc by the longitudinal support end screw bearing seat. The longitudinal support end slider can be installed on the longitudinal support end screw and can move up and down. The second end of the transverse screw is connected to the longitudinal support end slider through the rotating support end connecting rod.

The whole fruit moisture content detection device, wherein: the circumferential rotation mechanism includes a circumferential rotation drive mechanism and a circumferential rotation support mechanism, the circumferential rotation drive mechanism includes a driving end circular guide rail, a rotation drive motor, a rotation drive disc, a rotation drive motor bracket, a rotation drive slider, and a rotation drive end connecting rod installed on the left side mounting frame of the shell; wherein the rotation drive motor is fixed on the rotation drive motor bracket, the rotation drive motor bracket is installed on the left side mounting frame, the main shaft of the rotation drive motor is hinged to one end of the rotation drive connecting rod, the other end of the rotation drive connecting rod is connected to the rotation drive slider, the rotation drive slider is connected to the rotating disc, the driving end circular guide rail has a circle of dovetail grooves, the rotation drive slider is a dovetail slider, and is installed on the driving end circular guide rail.

The whole fruit moisture content detection device, wherein: the circumferential rotating support mechanism includes a rotating support end connecting rod, a rotating support slider and a supporting end circular guide rail; the supporting end circular guide rail is installed on the mounting frame on the right side of the outer shell, the supporting end circular guide rail and the driving end circular guide rail are of equal diameter and coaxial, and have the same structural shape, the supporting end circular guide rail has a circle of dovetail grooves, the rotating support slider is a dovetail slider, which is installed on the supporting end circular guide rail, and the rotating support slider is hinged to the transverse screw through the rotating support end connecting rod.

The whole fruit moisture content detection device, wherein: the outer shell includes a shell, an elastic hinge and a channel switch door, the channel switch door includes three door leaves, which are installed at the circular door opening on the right side wall of the shell through elastic hinges, and the three door leaves constitute a circular door for closing the door opening, and the center of the circular door is a small circular hole; the whole fruit measuring device body is installed in the shell, the left side mounting frame of the whole fruit measuring device body is installed on the left side wall of the shell, and the right side mounting frame of the whole fruit measuring device body is installed on the right side wall of the shell.

The whole fruit moisture content detection device further comprises accessories, which are installed in the shell and include a single chip microcomputer, a camera and a driver.

The whole fruit moisture content detection device is characterized in that: a push-pull observation window is provided on the top cover of the device shell.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a handheld moisture content detector of the present invention;

FIG2 is a schematic diagram of the position of the light source of the spectral sensor of the present invention;

FIG3 is an electronic control flow chart of the moisture content detection system of the present invention;

FIG4 is a schematic diagram of the effects of the host computer software of the present invention;

FIG5 is a flow chart of the modeling of the moisture content prediction model of the present invention; FIG.

FIG6 is a schematic diagram of the internal structure of the whole fruit detection device of the present invention;

FIG7 is a schematic diagram of the lateral displacement structure of the whole fruit detection device of the present invention;

FIG8 is a schematic diagram of the longitudinal displacement structure of the whole fruit detection device of the present invention;

FIG9 is a schematic structural diagram of the circumferentially rotating driving end of the whole fruit detection device of the present invention;

10 is a schematic diagram of the structure of the circumferentially rotating support end of the whole fruit detection device of the present invention;

11 is a schematic diagram of the structure of the housing and accessories of the whole fruit detection device of the present invention;

FIG. 12 is a schematic diagram of the shape of the housing of the device of the present invention.

The reference numerals are as follows:

Detailed ways

The specific implementation of the present invention will be described in detail below with reference to Figures 1-12.

As shown in FIG1 , the handheld moisture content detector comprises a detector housing 2, a control device 3, and a rubber sealing tube 6, which is used to quickly scan and detect the moisture content of corn after peeling. The detector housing 2 is a cylindrical shape with openings at both ends, and the main body of the control device 3 is cylindrical and can be detachably inserted into the detector housing 2, wherein the control device 3 encapsulates a spectral sensor and a single-chip microcomputer, and two small fixed bosses 1 are provided on the main body of the control device 3. The housing 2 is used to control the device 3 and is convenient for manual handholding. The housing 2 is provided with two fixed openings. After the control device 3 is inserted into the housing 2, the two fixed bosses 1 protrude from the two openings respectively, so that the control device 3 is fixed to the detector housing 2, and the rubber sealing tube 6 is detachably installed on the head of the housing 2. The rubber sealing tube 6 is used to press horizontally on the corn when measuring the moisture content, so that a closed dark room is formed between the spectral sensor and the corn kernels, so as to reduce the influence of external light such as sunlight on the measurement accuracy of the spectral sensor, so that the spectral sensor works in a closed dark room. The edge of the rubber sealing tube 6 is densely covered with multiple short openings. When the rubber sealing tube 6 is pressed on the corn, the edge can be easily folded outward, thereby facilitating the fit with the corn and preventing the sealed dark room from being exposed to light. The rear of the housing 2 is provided with two sheet-like tail wings, each of which has a card slot 4.

As shown in Fig. 2-3, the control device 3 includes a spectrum sensor 10 and a single chip computer 14. The spectrum sensor 10 includes a spectrum sensor probe 8, a light source 9, a filter 7, a filter 11, a photoelectric sensor 12, and a power supply module 13, which is used to identify the visible light to near-infrared spectrum, detect the moisture content of corn and transmit the electrical signal to the single chip computer 14; a filter 7 is installed at one end of the control device 3, and the filter 7 is installed at the top of the head of the shell 2 after the control device 3 is inserted into the shell 2, and the spectrum sensor probe 8 and the light source 9 are installed at the bottom of the filter 7, wherein the light source 9 is used to emit visible light and near-infrared light to the surface of the corn kernels, and the light source 9 is composed of a halogen lamp that can emit a full spectrum or a plurality of LED lamps that emit spectra of different bands. The filter 7 is used to transmit and absorb the light waves reflected back by the corn kernels, the spectrum sensor probe 8 is used to convert the light waves into light intensity signals, the photoelectric sensor 12 converts the light intensity signals received by the spectrum sensor probe 10 into voltage signals, and the filter 11 is used to amplify and filter the converted voltage signals to improve the signal-to-noise ratio. The power supply module 13 provides energy to make the spectrum sensor 10 work, wherein the spectrum sensor 10 supports multiple power supply modes, with built-in batteries or power modules, and can be powered by portable lithium batteries, or can be charged through the charging interface of a handheld moisture content detector. In addition, the spectrum sensor 10 can have built-in solar cells to receive and convert solar energy in the field to work. The single-chip computer 14 includes an AD conversion module 15, a Bluetooth module 16, a power module 17, and a data processing module 18, wherein the power module 17 supplies power to the single-chip computer 14, the AD conversion module 15 converts the electrical signal transmitted by the spectrum sensor 10 into a digital signal, the Bluetooth module 16 is used to wirelessly transmit the measurement data of the spectrum sensor 10 converted by the AD conversion module 15 to the host computer 19, and the data processing module 18 in the single-chip computer 14 performs signal analysis and processing on the received electrical signal, establishes a model between the voltage signal and the moisture content of corn, and transmits it to the host computer 19.

The modeling process of corn kernel moisture content is shown in Figure 4. The steps for establishing the moisture content prediction model are as follows:

Step 1: Sample preparation and spectral information collection: Select corn from the same plot at different growth stages as samples, and ensure that there is no obvious rot or large-scale breakage on the surface of the corn samples. Use a spectral sensor to scan and obtain spectral data of all corn samples.

Step 2. Measure the actual moisture content of corn kernels: According to the measurement standard of corn kernel moisture content, dry the threshed corn kernels for a certain period of time, record the weight of the kernels before and after drying, repeat the measurement multiple times and take the average value to obtain the moisture content of the corn kernels.

Step 3: Spectral data preprocessing: De-noise the spectral data of corn kernels and use a suitable filtering method to filter the collected spectral data to reduce spectral curve noise and improve the accuracy of modeling.

Step 4: Selection of spectral characteristic wavelengths: In order to select the best wavelength that can characterize the moisture content of corn, a certain method is used to evaluate the importance of the preprocessed smoothed spectral data, and the appropriate spectral characteristic wavelength is selected to achieve spectral data dimension reduction and improve the calculation speed.

Step 5. Establishment of moisture content model: Label the collected spectral data with the actual moisture content of corn kernels, use the data set partitioning method to obtain a certain proportion of training set and validation set, train the model based on machine learning and deep neural network, and establish a prediction model between spectral data and the actual moisture content of corn samples.

The upper computer interface effect diagram is shown in Figure 4. According to the established grain moisture content prediction model, the measured corn grain moisture content is displayed in real time on the upper computer 19 interface, and the upper computer 19 can realize the display, statistics, and export of moisture content data. In addition, the upper computer 19 can be connected to the detection cloud 20 to realize the mutual transmission of data. During use, the upper computer 19 can upload the collected data to the cloud to enrich the cloud data volume. At the same time, the upper computer 19 can also realize a more accurate measurement of the moisture content of corn grains based on the huge moisture content database in the cloud 20. The detection cloud 20 can store the moisture content data of corn grains of different plots, perform plot humidity statistics, and realize the prediction of harvest time through data processing and analysis, and further estimate the drying cost of corn after harvest.

Based on the aforementioned handheld moisture content detector, the present invention further provides a whole-fruit moisture content detection device, which includes a whole-fruit moisture content detection device body, a shell and a handheld moisture content detector 28. The whole-fruit moisture content detection device body is shown in Figure 6. When it is necessary to measure the moisture content of corn in all directions, the handheld moisture content detector 28 can be installed on the whole-fruit moisture content detection device body. The whole-fruit moisture content detection device body includes a lateral displacement mechanism, a longitudinal displacement mechanism, a circumferential rotation mechanism, a left mounting frame and a right mounting frame. The lateral displacement mechanism is installed on the longitudinal displacement mechanism, the longitudinal displacement mechanism is installed on the circumferential rotation mechanism, and the circumferential rotation mechanism is installed on the left mounting frame and the right mounting frame. The handheld moisture content detector 28 is installed on the lateral displacement mechanism.

The lateral displacement mechanism is shown in Figures 6 and 7. The lateral displacement mechanism includes a lateral drive motor 32, a lateral drive motor bracket 31, a coupling 25, a lateral lead screw 26, and a lateral slider 27. The handheld moisture content detector 28 is installed on the lateral lead screw 26, the lateral lead screw 26 is arranged horizontally, the lateral slider 27 is movably installed on the lateral lead screw 26, the lateral drive motor 32 is installed on the lateral drive motor bracket 31, the lateral drive motor 32 is connected to the first end of the lateral lead screw 26 through the coupling 25, and can drive the lateral lead screw 26 to rotate, and the lateral lead screw 26 can make the lateral slider 27 do lateral displacement, thereby driving the handheld moisture content detector 28 to move, and can realize the lateral measurement of corn. An elastic clamp 33 is fixed at the lower part of the lateral slider 27, and the clamp 33 is a gate-shaped structure, including a clamping beam and clamping plates on both sides of the beam, and the distance between the two clamping plates is slightly larger than the distance between the two sheet-like tail wings at the rear of the handheld moisture content detector housing.

The longitudinal displacement mechanism is shown in Figures 6, 8 and 10. The longitudinal displacement mechanism includes a longitudinal drive motor 23, a longitudinal drive motor bracket 37, a bevel gear 36, a longitudinal drive end lead screw 35, a longitudinal drive end slider 34, a longitudinal drive end bearing seat 38, a longitudinal coupling 44, a longitudinal support end slider 45, a longitudinal support end lead screw 46, a longitudinal support end lead screw bearing seat 47, a longitudinal support end motor 55, and a longitudinal support end motor bracket 56. The longitudinal drive motor 23 is mounted on the longitudinal drive motor bracket 37 and is located on the upper part of the transverse drive motor 32. The longitudinal drive motor bracket 37 is mounted on the rotating drive end disc 24. The axis of the longitudinal drive motor 23 is perpendicular to the axis of the transverse lead screw 26 in space. The rotating shaft of the longitudinal drive motor 23 is mounted with a bevel gear 36, which meshes with the bevel gear 36 installed on the top of the longitudinal lead screw 35. The longitudinal drive motor 23 drives the bevel gear 36 to rotate, and the rotation direction can be changed by a pair of bevel gears 36. The upper part of the longitudinal drive end lead screw 35 is fixedly connected to the bevel gear 36, and the lower part is connected to the longitudinal drive end bearing seat 38. The longitudinal drive end bearing seat 38 is mounted on the rotating drive end disc 24; the longitudinal drive end slider 34 is movably mounted on the longitudinal drive end lead screw 35 The rotation of the longitudinal drive motor 23 drives the longitudinal drive end slider 34 to move in the longitudinal direction. The longitudinal drive end slider 34 is connected to the transverse drive motor bracket 31 by bolts; one end of the longitudinal support end screw 46 is connected to the longitudinal support end motor 55 through the coupling 44, and the longitudinal support end motor 55 is fixed to the rotating support end disc 43 through the longitudinal support end motor bracket 56. The other end of the longitudinal support end screw 46 is fixed to the rotating support end disc 43 by the longitudinal support end screw bearing seat 47. The longitudinal support end slider 45 can be installed on the longitudinal support end screw 46 so as to be movable up and down. The second end of the transverse screw 26 is connected to the longitudinal support end slider 45 through the rotating support end connecting rod 41, and drives the transverse displacement mechanism to approach or move away from the corn together with the longitudinal drive end.

The circumferential rotation mechanism includes a circumferential rotation drive mechanism and a circumferential rotation support mechanism, wherein the circumferential rotation drive mechanism is shown in Figures 6 and 9. The circumferential rotation drive mechanism includes a rotation drive end circular guide rail 21 mounted on the left mounting frame, a rotation drive motor 22, a rotation drive end disc 24, a rotation drive motor bracket 39, a rotation drive end disc slider 40, and a rotation drive end connecting rod 41. The rotary drive motor 22 is fixed on the rotary drive motor bracket 39, and the rotary drive motor bracket 39 is installed on the left mounting frame. The main shaft of the rotary drive motor 22 is fixed to one end of the rotary drive connecting rod 41, and the other end of the rotary drive connecting rod 41 is connected to the rotary drive end disc slider 40, and the rotary drive end disc slider 40 is connected to the rotary drive end disc 24. The rotary drive end circular guide rail 21 has a circle of dovetail grooves. The rotary drive end disc slider 40 is a dovetail slider, which is installed on the rotary drive end circular guide rail 21. When the rotary drive end disc slider 40 slides on the rotary drive end circular guide rail 21, it drives the rotary drive end disc 24 and the transverse and longitudinal displacement mechanism to rotate, thereby realizing the circumferential measurement of corn.

The circumferential rotation support mechanism is shown in Figures 6 and 10. The circumferential rotation support mechanism includes a rotation support end connecting rod 42, a rotation support end disc slider 29, a rotation support end circular guide rail 30, and a rotation support end disc. The right mounting frame is equipped with a rotation support end circular guide rail 30, which is of equal diameter and coaxial with the rotation drive end circular guide rail 21, and has the same structural shape. The rotation support end disc slider 29 is connected to the rotation support end disc 43, and the rotation support end circular guide rail 30 has a circle of dovetail grooves. The rotation support end disc slider 29 is a dovetail slider installed on the rotation support end circular guide rail 30. The rotation support end disc slider 29 is fixedly connected to the second end of the transverse lead screw 26 through the rotation support end connecting rod 42 fixed thereon. Under the drive of the circumferential rotation drive mechanism, the rotation drive motor 22 drives the rotation support end disc slider 29 to slide on the rotation drive end circular guide rail 21 through the transverse lead screw 26, so as to realize the circumferential rotation of the horizontal and longitudinal displacement mechanism.

The shell and accessory structure of the whole fruit detection device are shown in Figure 11. The device shell includes a shell body 48, an elastic hinge 52, and a channel switch door 53. The channel switch door 53 includes three door leaves, which are installed at the circular door opening on the right side wall of the shell through the elastic hinge 52. The three door leaves constitute a circular door for closing the door opening, and the center of the circular door is a small circular hole. The whole fruit measurement device body is installed in the shell 48, the left side mounting frame of the whole fruit measurement device body is installed on the left side wall of the shell, and the right side mounting frame of the whole fruit measurement device body is installed on the right side wall of the shell.

Corn can enter the device through the channel switch door 53, and the opening and closing of the switch door 53 is realized by the hinge 52. The corn can push the switch door 53 open, and after entering the device, the channel switch door 53 is automatically closed. The device accessories include a single-chip microcomputer 51, a camera 50, and a driver 49, which are installed on the device housing 48. The single-chip microcomputer 51 is used to program and control the driver 49 and the camera 50 to work. The single-chip microcomputer 51 can send the picture taken by the camera to the host computer through a wireless communication device to observe the moving position of the device handheld moisture detector 28, making the movement of the handheld moisture detector more convenient. When the handheld moisture detector reaches the observation position, the camera 50 can be controlled to close by the single-chip microcomputer 51 to prevent the near-infrared light of the camera 50 from affecting the spectral detection effect. The driver is used to drive the motor to rotate to realize the movement of the handheld moisture detector 28 in the horizontal, longitudinal and circumferential directions.

The shape of the device shell is shown in Figure 12. A push-pull observation window 54 is provided at the top cover of the device shell, which can be used to replace the internal components of the device and observe the non-measurement stage. During the actual measurement process, except for the channel switch door 53, the device is in a fully closed state to form a closed darkroom.

The specific working process of the present invention is as follows: when measuring the moisture content of corn on field corn plants, place the handheld moisture content detector horizontally on the corn, press the detector lightly to make the rubber sealing ring 6 closely contact the corn, click the working button 5 on the handheld moisture content measuring instrument (the working button is set on the main body of the control device and can be exposed from the opening of the detector shell), complete the scanning measurement of the moisture content, and the moisture content data is displayed in real time on the interface of the host computer 19 and the data is stored in the detection cloud 20. The host computer software 19 can also analyze, draw, and export historical data. When the host computer 19 is not connected to the detection cloud 20, the moisture content is displayed in real time according to the established corn moisture content prediction model. When the host computer 19 is connected to the network and establishes a connection with the detection cloud 20, the moisture content data obtained by the detection has higher accuracy.

When it is necessary to measure the whole corn fruit in all directions, the card slot 4 of the handheld moisture content detector 28 is installed on the card clip 33 of the whole fruit detection device. Since the card clip 33 is elastic, the detector 28 can be firmly fixed. The corn is aligned with the channel switch door 53, and the corn pushes the switch door 53 open until it completely enters the whole fruit ear detection device. The switch door 53 is closed, and the corn husk blocks the small round hole in the center of the circular door, and the outer shell forms a closed dark room. The position of the corn in the dark room is observed by the camera 50, and the three motors are controlled by the single-chip microcomputer 51 to work respectively, so that the handheld moisture content detector 28 moves around the corn in the horizontal, vertical and circumferential directions. When the handheld moisture content detector 28 starts to work, the single-chip microcomputer 51 controls the camera 50 to close to avoid affecting the measurement accuracy of the spectral sensor.

The corn moisture content detector provided by the present invention can directly measure the moisture content of corn without threshing. The moisture content data can be displayed in real time on the corresponding host computer software, thereby improving the efficiency of moisture content measurement. A handheld moisture content measuring instrument and a whole-fruit moisture content measuring device are designed for different measurement requirements. Only the core control device needs to be replaced, which has wide adaptability and strong operability.

The above descriptions are merely embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the protection scope of the present invention.

Claims (3)

1. The utility model provides a full fruit moisture content detection device, includes shell, moisture content detection device main part, shell and handheld moisture content detector, its characterized in that: the handheld moisture content detector comprises a detector shell, a control device and a rubber sealing cylinder, and is characterized in that: the detector shell is in a cylindrical shape with openings at two ends, the control device main body is detachably inserted into the detector shell, the control device is packaged with the spectrum sensor and the singlechip, the rubber sealing cylinder is detachably arranged at the head of the shell, a plurality of short openings are uniformly formed in the edge of the rubber sealing cylinder, the handheld water content detector is arranged on the water content detector main body, and the water content detector main body is arranged in the shell;

The whole fruit moisture content detection device, wherein: the full fruit water content detection device main body comprises a transverse displacement mechanism, a longitudinal displacement mechanism, a circumferential rotation mechanism, a left mounting frame and a right mounting frame, wherein the transverse displacement mechanism is arranged on the longitudinal displacement mechanism, the longitudinal displacement mechanism is arranged on the circumferential rotation mechanism, and the circumferential rotation mechanism is arranged on the left mounting frame and the right mounting frame; the handheld water content detector is arranged on the transverse displacement mechanism;

the whole fruit moisture content detection device, wherein: the transverse displacement mechanism comprises a transverse driving motor, a transverse driving motor bracket, a coupler, a transverse screw rod and a transverse sliding block; the handheld water content detector is arranged on a transverse screw rod, the transverse screw rod is transversely arranged, the transverse sliding block is movably arranged on the transverse screw rod, the transverse driving motor is arranged on a transverse driving motor bracket, and the transverse driving motor is connected with the first end of the transverse screw rod through a coupler;

the whole fruit moisture content detection device, wherein: the lower part of the transverse sliding block is provided with an elastic clamping which is in a door-shaped structure and comprises a clamping cross beam and clamping plates at two sides of the cross beam, wherein the distance between the two clamping plates is slightly larger than the distance between two sheet-shaped tail wings at the tail part of the shell of the handheld moisture content detector; the clamping groove of the handheld water content detector is arranged on the clamping clip;

The whole fruit moisture content detection device, wherein: the longitudinal displacement mechanism comprises a longitudinal driving motor, a longitudinal driving motor bracket, a bevel gear, a longitudinal screw rod, a longitudinal driving end sliding block and a longitudinal driving end bearing seat, wherein the longitudinal driving motor is arranged on the longitudinal driving motor bracket and positioned at the upper part of the transverse driving motor, the longitudinal driving motor bracket is arranged on the rotary driving end disc, and the axis of the longitudinal driving motor is vertical to the axis space of the transverse screw rod; a bevel gear is arranged on the rotating shaft of the longitudinal driving motor and meshed with a bevel gear arranged at the top end of the longitudinal screw rod; the upper part of the longitudinal lead screw is connected with the bevel gear, the lower part of the longitudinal lead screw is connected with a longitudinal driving end bearing seat, and the longitudinal driving end bearing seat is arranged on the rotary driving end disc; the longitudinal sliding block driving end is movably arranged on the longitudinal screw rod and is connected with the transverse driving motor bracket; the longitudinal displacement mechanism further comprises a longitudinal coupler, a longitudinal support end sliding block, a longitudinal support end lead screw bearing seat, a longitudinal support end motor and a longitudinal support end motor bracket, one end of the longitudinal support end lead screw is connected with the longitudinal support end motor through the coupler, the longitudinal support end motor is fixed on the rotary support end disc through the longitudinal support end motor bracket, the other end of the longitudinal support end lead screw is fixed on the rotary support end disc through the longitudinal support end lead screw bearing seat, the longitudinal support end sliding block is arranged on the longitudinal support end lead screw in a vertically movable mode, and the second end of the transverse lead screw is connected with the longitudinal support end sliding block through the rotary support end connecting rod;

The whole fruit moisture content detection device, wherein: the circumferential rotation mechanism comprises a circumferential rotation driving mechanism and a circumferential rotation supporting mechanism, and the circumferential rotation driving mechanism comprises a driving end circular guide rail, a rotation driving motor, a rotation driving disc, a rotation driving motor bracket, a rotation driving sliding block and a rotation driving end connecting rod which are arranged on a mounting frame on the left side of the shell; the rotary driving motor is fixed on a rotary driving motor bracket, the rotary driving motor bracket is arranged on a left mounting frame, a main shaft of the rotary driving motor is hinged with one end of a rotary driving connecting rod, the other end of the rotary driving connecting rod is connected with a rotary driving sliding block, the rotary driving sliding block is connected with a rotary disc, a circle of dovetail grooves are formed in a driving end circular guide rail, and the rotary driving sliding block is a dovetail sliding block and is arranged on the driving end circular guide rail;

The whole fruit moisture content detection device, wherein: the circumferential rotation support mechanism comprises a rotation support end connecting rod, a rotation support sliding block and a support end circular guide rail; the right side mounting frame of the shell is provided with a supporting end circular guide rail, the supporting end circular guide rail and the driving end circular guide rail have the same diameter and the same axle center, the supporting end circular guide rail is provided with a circle of dovetail grooves, the rotary supporting sliding block is a dovetail sliding block and is arranged on the supporting end circular guide rail, and the rotary supporting sliding block is hinged with the transverse screw rod through a rotary supporting end connecting rod;

The whole fruit moisture content detection device, wherein: the shell comprises a shell body, an elastic hinge and a passage switch door, wherein the passage switch door comprises three door leaves, the three door leaves are arranged at a circular door opening on the right side wall of the shell body through the elastic hinge and form a circular door for closing the door opening, and the center of the circular door is a small round hole; the whole fruit measuring device main body is installed in the shell, the left side mounting frame of the whole fruit measuring device main body is installed on the left side wall of the shell, and the right side mounting frame of the whole fruit measuring device main body is installed on the right side wall of the shell.

2. The whole fruit moisture content detection apparatus according to claim 1, wherein: the spectrum sensor comprises a spectrum sensor probe, a light source, an optical filter, a photoelectric sensor and a power supply module.

3. The whole fruit moisture content detection apparatus according to claim 1, wherein: the singlechip comprises an AD conversion module, a Bluetooth transmission module, a power module and a data processing module.