CN208125305U - A kind of multidirectional wireless soil pressure sensor - Google Patents
A kind of multidirectional wireless soil pressure sensor Download PDFInfo
- Publication number
- CN208125305U CN208125305U CN201820032386.8U CN201820032386U CN208125305U CN 208125305 U CN208125305 U CN 208125305U CN 201820032386 U CN201820032386 U CN 201820032386U CN 208125305 U CN208125305 U CN 208125305U
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- crossbeam
- wireless
- dynamometry
- bearing disc
- digital signal
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model provides a kind of multidirectional wireless soil pressure sensor.Sensor is made of spherical hexahedron skeleton, bearing disc, annular briquetting, dynamometry crossbeam, sealing ring and measuring circuit plate.When ground pressure acts on platen, active force is applied to crossbeam center by platen, crossbeam is set to deform, crossbeam resistance-strain sheet resistance is pasted on to change, the voltage signal of every strain transducer output accesses multiplexer after amplifier improves, analog voltage signal is transformed to digital signal through AD converter by multiplexer output, digital signal through wireless data transmission module is sent to wireless coordinator after being handled by single-chip microcontroller, and the digital signal that wireless coordinator receives is sent to computer end by serial ports and is further processed rear recording and displaying.This sensor accuracy is high, at low cost, easy to use, adaptable, is widely portable to soil multiaxial stress comprehensive monitoring.
Description
Technical field
The utility model relates to a kind of multidirectional wireless soil pressure sensors of the media interiors compression such as measurement soil, especially
It is to be related to a kind of sensing device for measuring farmland arable soil pressure.
Background technique
In modern agriculture, with the development of mechanization of agriculture, the mechanical ramming problem of soil is got worse, and to agricultural
Production causes serious influence.Present China mainly passes through multiple tracks Surface Wave Method, soil density method, soil to the evaluation of soil compression
Earth Measuring The Volume Density and soil porosity method measure the machinery pressure solidity of soil, but are all the static soil pressure after soil compression
Measurement, and the variation of the ground pressure during soil compression can not be studied.Currently, foreign countries start to survey using soil pressure sensor
Ground pressure changes during amount soil is compacted, but there is also following deficiencies：
(1) soil pressure sensors such as bellows-type pressure-bearing surface is integrated with sensing element, when medium is uneven or load is irregular
Biggish measurement error can be generated.
(2) single branch sensor is only capable of measuring unidirectional ground pressure, cannot measure multidirectional ground pressure simultaneously.
(3) wired connection, external power supply, connection is cumbersome, big to soil disturbance.
Summary of the invention
In order to meet farmland arable soil pressure measurement requirement, the utility model devises a kind of multidirectional wireless soil pressure biography
Sensor, can adapt to ground pressure field it is uneven when measurement, single branch sensor can measure six, three directions face simultaneously
Soil pressure, and realize the function of data wireless transmission measurement.This device uses the measurement method of resistance-strain type, structure letter
It is single, it is low in cost, it is easy to use, it is widely portable to soil multiaxial stress comprehensive monitoring.
In order to realize the purpose of above-mentioned measurement, the utility model devises a kind of multidirectional wireless soil pressure sensor, includes
Spherical hexahedron skeleton, bearing disc, annular briquetting, dynamometry beam, sealing ring and measuring circuit plate.
The spherical hexahedron skeleton is provided with mutually orthogonal 3 through-holes, forms 6 on spherical hexahedron skeleton surface
Hole.
The dynamometry beam is embedded into 6 holes, and 4 strain gauges are pasted in the middle part of dynamometry beam, is coupled using full-bridge and is surveyed
Measure circuit.
The annular briquetting is patty, and center is provided with pilot hole, and outer rim is guide surface and is equipped with sealed groove, annular
Briquetting is pressed on dynamometry beam, and is bolted securely.
The bearing disc is disc, is placed in spherical hexahedron skeleton most external, is buckled on annular briquetting, bearing disc
Center is equipped with mandril, for transmitting bearing disc pressure to dynamometry beam.
The sealing ring is placed in the groove between bearing disc and annular briquetting, for it is dust-proof, buffer and prevent from pressing
Disk falls off.
The measuring circuit plate is placed in spherical hexahedron skeleton, by strain transducer, amplifier, multiplexer,
AD converter, single-chip microcontroller, wireless data transmission module, battery and charhing unit composition.
In the present invention, the voltage signal of every strain transducer output in six faces of the sensor is through amplifying
Multiplexer is accessed after device conditioning, analog voltage signal is transformed to digital signal through AD converter by multiplexer output,
Digital signal through wireless data transmission module is sent to wireless coordinator after being handled by single-chip microcontroller, the number letter that wireless coordinator receives
Number being sent to computer end by serial ports is further processed rear recording and displaying.
The relatively existing soil pressure sensor of the utility model has the characteristics that：
(1) bearing disc, annular briquetting, dynamometry girder construction mode separate bearing disc and dynamometry sensing element, can be to avoid
Soil stress measurement error caused by uneven distribution on bearing disc.
(2) the skeleton sensor of spherical hexahedron can be surveyed simultaneously in such a way that measurement module is all placed in six faces
Measure the soil pressure of three orthogonal directions.
(3) the utility model uses the method and wireless data transmission of resistance-strain type, and sensor structure is simple, operation letter
Just, low in cost, agricultural production can be better conformed to.
Detailed description of the invention
Fig. 1 is the main body shaft side figure of the multidirectional wireless soil pressure sensor of the utility model.
Fig. 2 is the main body cross-sectional view of the multidirectional wireless soil pressure sensor of the utility model.
Fig. 3 is the axonometric drawing of the spherical hexahedron skeleton of the utility model.
Fig. 4 is the sensor measuring circuit block diagram of the utility model.
In figure：1. spherical hexahedron skeleton；2. dynamometry crossbeam；3. annular briquetting；4. sealing ring；5. bearing disc；6. measurement
7. resistance strain gage of circuit board.
Specific embodiment
The purpose of the utility model is to provide a kind of multidirectional wireless soil pressure sensors.Spherical hexahedron skeleton be metal or
Engineering plastics can be completed using numerical control or 3D printing method, outer diameter 80mm, and measuring circuit plate is placed in inner space.?
The hole that diameter is 45mm is done in six faces of spherical hexahedron skeleton respectively, to place the circular cylinder of crossbeam and fixed cross beam.
It is fixed according to crossbeam both ends, its center bemding moment formula can be exported：
M=pl/8
W=bh2/6
The moment of flexure wherein put centered on M puts the pressure value of receiving centered on p, and W is the module of anti-bending section of the material, b
It is the width of crossbeam, h is the height of crossbeam.It is corresponding can to find out dynamometry crossbeam crossbeam according to formula for the allowable load of query material
It is wide and high, and the ground pressure value in the place can be gone out by above-mentioned formula theoretical calculation.
Resistance strain gage is carried out full-bridge connection by the resistance strain gage for determining and choosing corresponding size, and temperature-compensating obtains
Measuring circuit, and patch accesses multiplexer after every measuring circuit is accessed amplifier on dynamometry crossbeam, reconnects
AD conversion module is AD converted obtained voltage model, then accesses single-chip microcontroller, and data are handled by single-chip microcontroller, in order to
It realizes wireless data transmission, networking is carried out by ZigBee module, data-signal is finally passed through into 2.4GHz wireless transmission protocol
It is wirelessly transferred, and receives and be sent to computer end real-time display data by coordinator.Whole process realizes soil pressure
Power wireless monitoring function.Single-chip microcontroller is powered using battery 1.By amplifier, multiplexer, AD conversion module, single-chip microcontroller and
In the placement of ZigBee module and spherical hexahedron skeleton.Wireless data transmission uses ZigBee module, realizes data transmission
Be delayed short, low-power consumption and low cost.
Dynamometry beam is embedded into 6 holes, strain gauge is pasted in the middle part of dynamometry beam, and annular briquetting is embedded in 6 holes
It is pressed on side force beam.Sealing ring is put into again in the groove of annular briquetting, then bearing disc is placed on annular briquetting, passes through sealing
Ring is closely connect with it.
There are certain mistakes for described wireless soil pressure sensor theoretical calculation and actual measurement based on resistance-strain type
Difference, therefore soil pressure sensor must demarcated before, the utility model uses oil ga(u)ge and sand mark, can by experiment
Matched curve is obtained to obtain the practical ground pressure value of data and the external world that single chip computer measurement obtains；It is passed by wireless ground pressure
Sensor, which measures pressure change in soil, will pass through two processes, including sensor is placed and data-signal is transmitted and handled：Sensing
It is to work as to choose certain depth that device, which is placed, then the artificial inbuilt method in Side wall drill hole of digging pit of cooperation, reduction pair to the greatest extent
The disturbance and destruction of original position soil configuration state can more accurately reflect the stress and compacting situation of agricultural land soil；Signal
Processing is to pass the signal along to single-chip microcontroller after sensor is placed into the soil through excess pressure transmitting, obtained by fit curve equation
The ground pressure in the region, and the ground pressure of different directions at this can be obtained simultaneously.
In the present invention, when final data is handled, two measured values in the same direction can be compared, and
Threshold value is set, the data that mistake occurs are excluded, for final result using the two average value, DATA REASONING is more accurate.
The utility model is illustrated by specific implementation process, the case where not departing from the scope of the utility model
Under, various transformation and equivalent replacement can also be carried out to the utility model patent, therefore, the utility model patent is not limited to institute
Disclosed specific implementation process, and should include the whole embodiments fallen into the utility model patent scope of the claims.
Claims (2)
1. a kind of multidirectional wireless soil pressure sensor, it is characterized in that：The soil pressure sensor includes spherical hexahedron skeleton
(1), bearing disc (5), annular briquetting (3), dynamometry crossbeam (2), sealing ring (4) and measuring circuit plate (6) are constituted；The spherical shape
Hexahedron skeleton (1) is provided with mutually orthogonal 3 through-holes, forms 6 holes on spherical hexahedron skeleton surface；The dynamometry crossbeam
(2) it is embedded into 6 holes, strain gauge (7) is pasted in the middle part of dynamometry crossbeam；The annular briquetting (3) is patty, center
It is provided with pilot hole, outer rim is guide surface and is equipped with sealed groove, and annular briquetting (3) is pressed on dynamometry crossbeam (2), and passes through bolt
Fixation；The bearing disc (5) is disc, is placed in spherical hexahedron skeleton (1) most external, is buckled on annular briquetting,
The center of bearing disc (5) is equipped with thimble, for transmitting bearing disc pressure to dynamometry crossbeam；In bearing disc (5) and annular briquetting
Between have sealing ring (4).
2. the multidirectional wireless soil pressure sensor of one kind according to claim 1, it is characterised in that the measuring circuit plate
(6) it is intermediate to be placed in spherical hexahedron skeleton (1), by strain transducer, amplifier, multiplexer, AD converter, single-chip microcontroller,
Wireless data transmission module, battery and charhing unit composition；The voltage signal of every strain transducer output is followed by through amplifier conditioning
Enter multiplexer, analog voltage signal is transformed to digital signal through AD converter by multiplexer output, digital signal by
It is sent to wireless coordinator through wireless data transmission module after single-chip microcontroller processing, the digital signal that wireless coordinator receives passes through serial ports
It is sent to computer end and is further processed rear recording and displaying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032386.8U CN208125305U (en) | 2018-01-09 | 2018-01-09 | A kind of multidirectional wireless soil pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032386.8U CN208125305U (en) | 2018-01-09 | 2018-01-09 | A kind of multidirectional wireless soil pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208125305U true CN208125305U (en) | 2018-11-20 |
Family
ID=64209255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820032386.8U Expired - Fee Related CN208125305U (en) | 2018-01-09 | 2018-01-09 | A kind of multidirectional wireless soil pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208125305U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107957305A (en) * | 2018-01-09 | 2018-04-24 | 东北农业大学 | A kind of multidirectional wireless soil pressure sensor |
| US20230044394A1 (en) * | 2021-01-26 | 2023-02-09 | Wenzhou University | Wireless detection device and wireless detection method for quickly positioning throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction |
-
2018
- 2018-01-09 CN CN201820032386.8U patent/CN208125305U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107957305A (en) * | 2018-01-09 | 2018-04-24 | 东北农业大学 | A kind of multidirectional wireless soil pressure sensor |
| US20230044394A1 (en) * | 2021-01-26 | 2023-02-09 | Wenzhou University | Wireless detection device and wireless detection method for quickly positioning throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction |
| US11920315B2 (en) * | 2021-01-26 | 2024-03-05 | Wenzhou University | Wireless detection device and wireless detection method for quickly positioning throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181120 Termination date: 20200109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |