CN204462061U - A kind of new soil moisture content detection device - Google Patents
A kind of new soil moisture content detection device Download PDFInfo
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- CN204462061U CN204462061U CN201520091298.1U CN201520091298U CN204462061U CN 204462061 U CN204462061 U CN 204462061U CN 201520091298 U CN201520091298 U CN 201520091298U CN 204462061 U CN204462061 U CN 204462061U
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- resistance
- potentiometer
- discharge
- triode
- moisture
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Abstract
The utility model discloses a kind of new soil moisture content detection device, one end of discharge is communicated with one end of plastic tube, rubber stopper is arranged on the other end of discharge, pot clay end is arranged on the other end of plastic tube, the sidewall of discharge and the measuring junction of moisture transducer are connected, moisture transducer and piezoresistance sensor are connected, and piezoresistance sensor and sensor circuit are electrically connected.The utility model in use, water is filled in discharge and plastic tube, cover rubber stopper, after gas in discharge and plastic tube is discharged, potter's clay head end is placed in soil, after pot clay end is flooded profit, water membrane is formed in space, when being full of water and the soil moisture sensor of sealing inserts the undersaturated soil of moisture, moisture film is just connected with the holard, the water of instrument internal is made to produce negative pressure, this suction function is in piezoresistance sensor, piezoresistance sensor converts negative pressure to electric signal, thus detection moisture, simple to operate, can monitor continuously, and can not radioactive contamination be caused.
Description
Technical field
The utility model relates to Soil Testing, particularly relates to a kind of new soil moisture content detection device.
Background technology
Soil environment monitoring refers to by the mensuration of typical value affecting soil environment quality factor, determines environmental quality (or pollution level) and variation tendency thereof.We refer to soil environment monitoring at usually said soil monitoring, and it generally comprises the technology contents such as cloth point sampling, sample preparation, analytical approach, result sign, statistics and quality assessment.
Soil K+adsorption instrument has divided multiple
1. soil pre-treatment
Soil sample collector | soil shakes sieve instrument | cutting ring | soil sieve | soil liquid sampler.
2. soil nutrient
Soil nutrient tacheometer | desk-top near infrared soil nutrient tacheometer | hand-held soil nutrient tacheometer | nylon mesh | azotometer | ionometer | PH counts.
Atomic absorption spectrophotometer (AAS) | inscription hollow cathode lamp | second block steel cylinder | Atomic Absorption Spectrometer | atomic fluorescence spectrophotometer | mercury vapor analyzer | titrator.
Gas chromatograph | spectrophotometer | conductivity meter | soil salt analyzer.
3. soil moisture
Portable soil moisture tacheometer | timing localized soil soil moisture measure | portable soil soil moisture content analyzer | GPS soil moisture temperature tacheometer.
Wireless Soil Moisture Monitoring system | section moisture monitoring system | oven drying method infrared moisture tester | soil moisture temperature tacheometer | soil moisture content and damage caused by a drought management system.
Electric heating constant-temperature blowing drying box | soil breaker | moisture aluminium box | silica gel | exsiccator.
4. soil hardness detecting instrument
Digital soil sclerometer | pointer stratometer | soil density analyzer | GPS soil density analyzer.
The soil moisture detection instrument used at present is generally divided into two large classes, and a class is changing position sampling and measuring, and another kind of is that in-situ sampling measures; The general operation of changing position sampling and measuring is loaded down with trivial details, and can not monitor in field real-time continuous; Though the NEUTRON METHOD commonly used and gamma-rays method quick and precisely can be measured in outdoor during in-situ sampling measures, but instrument price is expensive and easily occur radiocontamination.
Utility model content
The purpose of this utility model is just to provide a kind of new soil moisture content detection device to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of new soil moisture content detection device, comprise moisture transducer, piezoresistance sensor, sensor circuit, discharge, plastic tube, pot clay end and rubber stopper, described discharge and the equal both ends open of described plastic tube, one end of described discharge is communicated with one end of described plastic tube, described rubber stopper is arranged on the other end of described discharge, described pot clay end is arranged on the other end of described plastic tube, the sidewall of described discharge and the measuring junction of described moisture transducer are connected, described moisture transducer and described piezoresistance sensor are connected, described piezoresistance sensor and described sensor circuit are electrically connected.
In above-mentioned, in use, water is filled in discharge and plastic tube, cover rubber stopper, after gas in discharge and plastic tube is discharged, potter's clay head end is placed in soil, after pot clay end is flooded profit, water membrane is formed in space, when being full of water and the soil moisture sensor of sealing inserts the undersaturated soil of moisture, moisture film is just connected with the holard, the water of instrument internal is made to produce negative pressure, this suction function is in solid state resistance pressure sensor, piezoresistance sensor converts negative pressure to electric signal, thus the electric signal of arbitrfary point soil suction within the scope of 0-100kPa can be obtained.
Particularly, described sensor circuit comprises the first potentiometer to the 3rd potentiometer, first resistance is to the 13 resistance, first triode, second triode, power supply and differential amplifier, the signal output part of described moisture transducer is connected with the first end of described first potentiometer after being connected with the first signal output part of described piezoresistance sensor again, second end of described first potentiometer respectively with the sliding end of described first potentiometer, the first end of described first resistance, the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th resistance is connected with the positive pole of described power supply, the secondary signal output terminal of described piezoresistance sensor is connected with the first end of described 7th resistance, second end of described 7th resistance is connected with the base stage of described first triode, the secondary signal output terminal of described piezoresistance sensor is connected with the first end of described tenth resistance, second end of described tenth resistance is connected with the base stage of described second triode, the emitter of described first triode is connected with the emitter of described second triode and the first end of described 11 resistance respectively, second end of described 11 resistance respectively with the first end of described 8th resistance, the first end of described 12 resistance connects rear ground connection, second end of described first resistance is connected with the second end of described 8th resistance, second end of described second resistance is connected with the collector of described first triode and the first end of described 9th resistance respectively, second end of described 3rd resistance is connected with the collector of described second triode, second end of described 4th resistance is connected with the second end of described 12 resistance, second end of described 9th resistance respectively with the first end of described second potentiometer, the sliding end of described second potentiometer is connected with described differential amplifier in-phase input end, the inverting input of described differential amplifier is connected with the first end of described 13 resistance, second end ground connection of described 13 resistance, the cathode output end of described differential amplifier is connected with the first end of described 6th resistance, second end of described 6th resistance respectively with the first end of described 3rd potentiometer, the sliding end of described 3rd potentiometer, the first end of described 5th resistance is connected with the output terminal of described differential amplifier, second end of described 5th resistance is connected with the second end of described second potentiometer, second end of described 3rd potentiometer is connected with the negative pole of described power supply and the cathode output end of described differential amplifier respectively.
The beneficial effects of the utility model are:
The utility model in use, water is filled in discharge and plastic tube, cover rubber stopper, after gas in discharge and plastic tube is discharged, potter's clay head end is placed in soil, after pot clay end is flooded profit, water membrane is formed in space, when being full of water and the soil moisture sensor of sealing inserts the undersaturated soil of moisture, moisture film is just connected with the holard, the water of instrument internal is made to produce negative pressure, this suction function is in solid state resistance pressure sensor, piezoresistance sensor converts negative pressure to electric signal, thus the electric signal of arbitrfary point soil suction within the scope of 0-100kPa can be obtained, simple to operate, can monitor continuously, and can not radioactive contamination be caused.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model new soil moisture content detection device;
Fig. 2 is the circuit diagram of the utility model new soil moisture content detection device.
In figure: 1-rubber stopper, 2-moisture transducer, 3-discharge, 4-plastic tube, 5-pot clay end.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the novel a kind of new soil moisture content detection device of the utility model, comprise moisture transducer 2, piezoresistance sensor, sensor circuit, discharge 3, plastic tube 4, pot clay end 5 and rubber stopper 1, discharge 3 and plastic tube 4 all both ends opens, one end of discharge 3 is communicated with one end of plastic tube 4, rubber stopper 1 is arranged on the other end of discharge 3, pot clay end 5 is arranged on the other end of plastic tube 4, the sidewall of discharge 3 and the measuring junction of moisture transducer 2 are connected, moisture transducer 2 and piezoresistance sensor are connected, piezoresistance sensor and sensor circuit are electrically connected.
As shown in Figure 2, sensor circuit comprises the first potentiometer RP1 to the 3rd potentiometer RP3, first resistance R1 is to the 13 resistance R13, first triode VT1, second triode VT2, power supply U and differential amplifier U, the signal output part of moisture transducer 2 is connected with the first end of the first potentiometer RP1 after being connected with the first signal output part of piezoresistance sensor again, second end of the first potentiometer RP1 respectively with the sliding end of the first potentiometer RP1, the first end of the first resistance R1, the first end of the second resistance R2, the first end of the 3rd resistance R3, the first end of the 4th resistance R4 is connected with the positive pole of power supply U, the secondary signal output terminal of piezoresistance sensor is connected with the first end of the 7th resistance R7, second end of the 7th resistance R7 is connected with the base stage of the first triode VT1, the secondary signal output terminal of piezoresistance sensor is connected with the first end of the tenth resistance R10, second end of the tenth resistance R10 is connected with the base stage of the second triode VT2, the emitter of the first triode VT1 is connected with the emitter of the second triode VT2 and the first end of the 11 resistance R11 respectively, second end of the 11 resistance R11 respectively with the first end of the 8th resistance R8, the first end of the 12 resistance R12 connects rear ground connection, second end of the first resistance R1 is connected with second end of the 8th resistance R8, second end of the second resistance R2 is connected with the collector of the first triode VT1 and the first end of the 9th resistance R9 respectively, second end of the 3rd resistance R3 is connected with the collector of the second triode VT2, second end of the 4th resistance R4 is connected with second end of the 12 resistance R12, second end of the 9th resistance R9 respectively with the first end of the second potentiometer RP2, the sliding end of the second potentiometer RP2 is connected with differential amplifier U in-phase input end, the inverting input of differential amplifier U is connected with the first end of the 13 resistance R13, the second end ground connection of the 13 resistance R13, the cathode output end of differential amplifier U is connected with the first end of the 6th resistance R6, second end of the 6th resistance R6 respectively with the first end of the 3rd potentiometer RP3, the sliding end of the 3rd potentiometer RP3, the first end of the 5th resistance R5 is connected with the output terminal of differential amplifier U, second end of the 5th resistance R5 is connected with second end of the second potentiometer RP2, second end of the 3rd potentiometer RP3 is connected with the negative pole of power supply U and the cathode output end of differential amplifier U respectively.
During use, water is filled in discharge 3 and plastic tube 4, cover rubber stopper 1, after gas in discharge 3 and plastic tube 4 is discharged, pot clay end 5 end is placed in soil, after pot clay end 5 is flooded profit, water membrane is formed in space, when being full of water and the soil moisture sensor 2 of sealing inserts the undersaturated soil of moisture, moisture film is just connected with the holard, and make the water of instrument internal produce negative pressure, this suction function is in solid state resistance pressure sensor, piezoresistance sensor converts negative pressure to electric signal, thus can obtain the electric signal of arbitrfary point soil suction within the scope of 0-100kPa.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical solution of the utility model, all falls within protection domain of the present utility model.
Claims (2)
1. a new soil moisture content detection device, it is characterized in that: comprise moisture transducer, piezoresistance sensor, sensor circuit, discharge, plastic tube, pot clay end and rubber stopper, described discharge and the equal both ends open of described plastic tube, one end of described discharge is communicated with one end of described plastic tube, described rubber stopper is arranged on the other end of described discharge, described pot clay end is arranged on the other end of described plastic tube, the sidewall of described discharge and the measuring junction of described moisture transducer are connected, described moisture transducer and described piezoresistance sensor are connected, described piezoresistance sensor and described sensor circuit are electrically connected.
2. new soil moisture content detection device according to claim 1, it is characterized in that: described sensor circuit comprises the first potentiometer to the 3rd potentiometer, first resistance is to the 13 resistance, first triode, second triode, power supply and differential amplifier, the signal output part of described moisture transducer is connected with the first end of described first potentiometer after being connected with the first signal output part of described piezoresistance sensor again, second end of described first potentiometer respectively with the sliding end of described first potentiometer, the first end of described first resistance, the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th resistance is connected with the positive pole of described power supply, the secondary signal output terminal of described piezoresistance sensor is connected with the first end of described 7th resistance, second end of described 7th resistance is connected with the base stage of described first triode, the secondary signal output terminal of described piezoresistance sensor is connected with the first end of described tenth resistance, second end of described tenth resistance is connected with the base stage of described second triode, the emitter of described first triode is connected with the emitter of described second triode and the first end of described 11 resistance respectively, second end of described 11 resistance respectively with the first end of described 8th resistance, the first end of described 12 resistance connects rear ground connection, second end of described first resistance is connected with the second end of described 8th resistance, second end of described second resistance is connected with the collector of described first triode and the first end of described 9th resistance respectively, second end of described 3rd resistance is connected with the collector of described second triode, second end of described 4th resistance is connected with the second end of described 12 resistance, second end of described 9th resistance respectively with the first end of described second potentiometer, the sliding end of described second potentiometer is connected with described differential amplifier in-phase input end, the inverting input of described differential amplifier is connected with the first end of described 13 resistance, second end ground connection of described 13 resistance, the cathode output end of described differential amplifier is connected with the first end of described 6th resistance, second end of described 6th resistance respectively with the first end of described 3rd potentiometer, the sliding end of described 3rd potentiometer, the first end of described 5th resistance is connected with the output terminal of described differential amplifier, second end of described 5th resistance is connected with the second end of described second potentiometer, second end of described 3rd potentiometer is connected with the negative pole of described power supply and the cathode output end of described differential amplifier respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520091298.1U CN204462061U (en) | 2015-02-09 | 2015-02-09 | A kind of new soil moisture content detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520091298.1U CN204462061U (en) | 2015-02-09 | 2015-02-09 | A kind of new soil moisture content detection device |
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| CN204462061U true CN204462061U (en) | 2015-07-08 |
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| CN201520091298.1U Expired - Fee Related CN204462061U (en) | 2015-02-09 | 2015-02-09 | A kind of new soil moisture content detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548520A (en) * | 2015-12-07 | 2016-05-04 | 重庆多邦科技股份有限公司 | Soil moisture detecting apparatus |
| CN114295512A (en) * | 2021-12-31 | 2022-04-08 | 中国地质大学（武汉） | Device and method for measuring soil moisture characteristic curve and unsaturated permeability coefficient |
-
2015
- 2015-02-09 CN CN201520091298.1U patent/CN204462061U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548520A (en) * | 2015-12-07 | 2016-05-04 | 重庆多邦科技股份有限公司 | Soil moisture detecting apparatus |
| CN114295512A (en) * | 2021-12-31 | 2022-04-08 | 中国地质大学（武汉） | Device and method for measuring soil moisture characteristic curve and unsaturated permeability coefficient |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160209 |