CN110261325A - A kind of agricultural product quality monitoring system based on sensing network - Google Patents
A kind of agricultural product quality monitoring system based on sensing network Download PDFInfo
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- CN110261325A CN110261325A CN201910632113.6A CN201910632113A CN110261325A CN 110261325 A CN110261325 A CN 110261325A CN 201910632113 A CN201910632113 A CN 201910632113A CN 110261325 A CN110261325 A CN 110261325A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The present invention provides a kind of agricultural product quality monitoring system based on sensing network, utilize water content detection sensor, signal processing circuit, laser receiver, optical spectrum imagers, vibrating sensor, display unit, central processing unit, trigger unit, first quality inspection unit, second quality inspection unit, mechanical clamping device, wireless transmission unit, mobile terminal unit, data storage cell, light source, generating device of laser and transmission belt detect the quality of agricultural product to be measured, wherein it is monitored using spectrum picture of the optical spectrum imagers to agricultural product, it is monitored simultaneously using moisture information of the water content detection sensor to agricultural product to be measured, the detection accuracy to agricultural product to be measured can be greatly improved using two kinds of detection modes.
Description
Technical field
The present invention relates to smart machine fields more particularly to a kind of agricultural product quality based on sensing network to monitor system.
Background technique
China is large agricultural country, and agricultural is the tradition and basic industry of China.The plantations of agricultural product, processing, consumption and go out
Mouth has stronger dependence to the Quality Detection of agricultural product.Now applicable quality of agricultural product detection method have destroy sample,
It consumes the plenty of time, even seriously pollute the inevitable disadvantages such as environment.For the Chinese agricultural production of sound development, raising of agricultural
The gentle solution environmental pressure of the international competitiveness of product needs to develop a kind of quality of agricultural product detection method of quick nondestructive.
High light spectrum image-forming technology is the image data technology based on very more narrow-bands to grow up in the past 20 years, is concentrated
The advanced technology in the fields such as optics, photoelectronics, electronics, information processing, computer science, is traditional two-dimensional imaging skill
The emerging technology that art and spectral technique combine.High light spectrum image-forming technology geology, vegetative coverage detection,
The multiple fields such as atmospheric remote sensing have extensive research and application, and achieve preferable effect.It also has huge in agricultural
Application potential, the spectral signature of crops be by crops physiological characteristic to the absorption of light, transmission and reflection determined
, its physiologic information is further analyzed by the spectral information of crops, and then obtain the pathological characters of crops, upgrowth situation
With the effective informations such as quality characteristic.Using high light spectrum image-forming technology can accurately and fast, the quality of lossless acquisition crops it is special
Property, it is the important means of future crop plants Quality Detection.
EO-1 hyperion is to obtain technology of the object in relation to data using many narrow electromagnetic wave bands, it can be in the purple of electromagnetic wave
Outside, visible light, near-infrared, in it is infrared so that thermal infrared region, obtain many continuous image datas of very narrow and spectrum, be every
A pixel provides tens of to hundreds of narrow-band (usual waveband width < 10nm) spectral informations, can generate one it is complete and continuous
The curve of spectrum.EO-1 hyperion has the characteristics that multiband, high-resolution and collection of illustrative plates, two dimensional image and spectral technique melt for
One.
But in the prior art, single to the gimmick of detection of agricultural products, and respectively there is drawback, single use sensor pair
The precision when parameter of agricultural product is detected is not high, and moisture information is one of important information of agricultural product, at present to agricultural production
The water content detection precision of product is not high, and the single spectrum picture to agricultural product is analyzed, and precision is also in urgent need to be improved, it is important to be made
When being transmitted with transmission device to agricultural product, agricultural product are since the vibration by transmission device is influenced, spectrum picture collected
Precision is not high, and a variety of factors result in not high to the precision of agricultural product quality monitoring at present.
Summary of the invention
Therefore, in order to overcome the above problem, the present invention provides a kind of agricultural product quality monitoring system based on sensing network,
Using water content detection sensor, signal processing circuit, laser receiver, optical spectrum imagers, vibrating sensor, display unit,
Central processing unit, trigger unit, the first quality inspection unit, the second quality inspection unit, mechanical clamping device, wireless transmission unit, shifting
Dynamic terminal unit, data storage cell, light source, generating device of laser and transmission belt examine the quality of agricultural product to be measured
It surveys, wherein being monitored using spectrum picture of the optical spectrum imagers to agricultural product, while using water content detection sensor to be measured
The moisture information of agricultural product is monitored, and can greatly improve the detection accuracy to agricultural product to be measured using two kinds of detection modes,
Further, it is handled using the signal that signal processing circuit acquires water content detection sensor, further increases and treat
The precision of agricultural product water content detection is surveyed, meanwhile, in order to reduce the vibration that transmission belt passes to agricultural product to be measured, use vibrating sensing
Device acquires the vibration signal of transmission belt, if vibration signal is greater than threshold value, is carried out using mechanical clamping device to agricultural product to be measured
It grips, further improves the precision to agricultural product spectrum picture to be measured detection.
Agricultural product quality monitoring system provided by the invention based on sensing network includes water content detection sensor, at signal
Manage circuit, laser receiver, optical spectrum imagers, vibrating sensor, display unit, central processing unit, trigger unit, first
Quality inspection unit, the second quality inspection unit, mechanical clamping device, wireless transmission unit, mobile terminal unit, data storage cell, light
Source, generating device of laser and transmission belt.
Wherein, agricultural product to be measured are placed in transmission belt, the output end of water content detection sensor and signal processing circuit
Input terminal connection, the output end of laser receiver, the output end of signal processing circuit, the output end of optical spectrum imagers and vibration
The output end of dynamic sensor is connect with the input terminal of central processing unit, and trigger unit is connect with optical spectrum imagers, transmission belt
Input terminal, the input terminal of display unit, the input terminal of trigger unit, the first quality inspection unit input terminal, the second quality inspection unit
Input terminal and the input terminal of mechanical clamping device connect with the output end of central processing unit, the first quality inspection unit and
Two quality inspection units pass through wireless transmission unit and connect with mobile terminal unit, and the first quality inspection unit and the second quality inspection unit are logical
Wireless transmission unit is crossed to connect with data storage cell.
Water content detection sensor is used to detect the moisture information of agricultural product to be measured, and moisture information is converted to current signal
After be transmitted to signal processing circuit, for emitting laser beams, laser receiver is for receiving laser for generating device of laser
The laser beam that device issues, optical spectrum imagers are used to acquire the spectrum picture of agricultural product to be measured, and light source is vibrated for providing illumination
Sensor is set to transmission belt bottom, and vibrating sensor is used to acquire the vibration signal of transmission belt.
Agricultural product to be measured are placed in transmission belt, and the moisture information of agricultural product to be measured is detected using water content detection sensor,
And it is transmitted to signal processing circuit after moisture information is converted to current signal, signal processing circuit is to the current signal received
Voltage signal is converted to after carrying out signal processing and is transmitted to central processing unit, and central processing unit believes the voltage received
Number be converted to the moisture information of agricultural product to be measured, transmission belt transmits agricultural product to be measured to mobile immediately below optical spectrum imagers, when swashing
When optical receiver apparatus does not receive the laser beam of generating device of laser sending, laser receiver sends the first trigger signal into
Control transmission belt stops operation after entreating processing unit, central processing unit to receive the first trigger signal, vibrating sensor acquisition
The vibration signal of transmission belt, and vibration signal is transmitted to central processing unit, central processing unit believes the vibration received
It number is compared with the vibration threshold being stored in the memory module in central processing unit, if what central processing unit received
Vibration signal is less than or equal to vibration threshold, then central processing unit controls trigger unit and issues the second triggering letter to optical spectrum imagers
Number, optical spectrum imagers, which receive, acquires agricultural product spectrum picture to be measured after the second trigger signal, and spectrum picture is transmitted to
Processing unit is entreated, if the vibration signal that central processing unit receives is greater than vibration threshold, central processing unit control is mechanical
Agricultural product to be measured are gripped the vibration that agricultural product to be measured are transferred to less transmission belt by clamping device, in central processing unit
After control mechanical clamping device grips agricultural product to be measured, central processing unit controls trigger unit and sends out to optical spectrum imagers
Second trigger signal out, optical spectrum imagers, which receive, acquires agricultural product spectrum picture to be measured after the second trigger signal, and by spectrum
Image transmitting is to central processing unit, and central processing unit is by the moisture information received and transfer spectral information to display unit
It is shown, central processing unit will receive moisture information and be transmitted to the first quality inspection unit, and the first quality inspection unit will receive
Moisture information be compared with Soil Moisture Threshold, and by comparison result by wireless transmission unit be transmitted to mobile terminal unit and
The spectrum picture received is transmitted to the second quality inspection unit, the second quality inspection unit root by data storage cell, central processing unit
It is compared according to the spectrum picture received with standard spectrum image, and comparison result is transmitted to shifting by wireless transmission unit
Dynamic terminal unit and data storage cell.
Preferably, optical spectrum imagers are set to the surface of transmission belt.
Preferably, the quantity of light source is 2.
Preferably, agricultural product to be measured are placed in transmission belt, detect agricultural product to be measured using water content detection sensor
Moisture information, and moisture information is converted to and is transmitted to signal processing circuit after current signal, signal processing circuit is to receiving
Current signal successively carry out signal amplification and signal filtering processing after be converted to voltage signal and be transmitted to central processing unit.
Preferably, water content detection sensor detects the moisture information of agricultural product to be measured, by the agricultural product to be measured of acquisition
Moisture signal is converted to current signal I0, and current signal I0 is transmitted to signal processing circuit, and V1 is by signal processing electricity
Treated on road voltage signal, signal processing circuit includes signal amplification unit and signal filter unit, water content detection sensor
Output end and the input terminal of signal amplification unit connect, the input terminal of the output end of signal amplification unit and signal filter unit
Connection, the output end of signal filter unit and the input terminal of central processing unit connect.
Preferably, signal amplification unit includes integrated transporting discharging A1, capacitor C1-C9, field-effect tube VT1, triode VT2-
VT7, diode D1-D8 and resistance R1-R14.
Wherein, the output end of water content detection sensor is connect with one end of resistance R1, the other end and resistance R3 of resistance R1
One end connection, the other end of resistance R1 also connect with one end of resistance R2, and one end of capacitor C1 is connect with one end of resistance R2,
The other end of capacitor C1 is connect with the other end of resistance R2, and the other end of resistance R3 and the non-inverting input terminal of integrated transporting discharging A1 connect
It connects, one end of capacitor C2 is connect with the inverting input terminal of integrated transporting discharging A1, the same phase of the other end and integrated transporting discharging A1 of capacitor C2
Input terminal connection, one end of the reverse inter-input-ing ending grounding of integrated transporting discharging A1, resistance R2 are connect with the grid of field-effect tube VT1, electricity
One end of resistance R4 is connect with -15V power supply, and the other end of resistance R4 is connect with the source electrode of field-effect tube VT1, the other end of resistance R4
It is connect with one end of capacitor C3, the other end of resistance R4 is also connect with the output end of integrated transporting discharging A1, the drain electrode of field-effect tube VT1
It is connect with the anode of diode D1, one end of resistance R5 is connect with the other end of capacitor C3, the cathode and resistance R5 of diode D1
Other end connection, the cathode of diode D2 connect with -15V power supply, and the anode of diode D2 is connect with one end of resistance R8, electric
The one end for holding C4 is connect with the output end of integrated transporting discharging A1, and the other end of resistance R8 is connect with the other end of capacitor C4, resistance R7
One end connect with the other end of resistance R8, the other end of resistance R7 is connect with the output end of integrated transporting discharging A1, the one of resistance R6
End connect with the other end of resistance R7, the other end of resistance R6 is connect with one end of resistance R5, one end of resistance R5 also with three poles
The base stage of pipe VT2 connects, and one end of capacitor C5 is connect with the base stage of triode VT3, and the other end of capacitor C5 is with triode VT2's
Base stage connection, one end of resistance R10 are connect with -15V power supply, and the one end capacitor C7 ground connection, the other end of resistance R10 is with capacitor C7's
Other end connection, the other end of resistance R10 are also connect with the emitter of triode VT3, the cathode and triode VT3 of diode D6
Collector connection, the cathode of diode D6 also connect with the base stage of triode VT5, and the cathode of diode D5 is with diode D6's
Anode connection, the anode of diode D5 are connect with the anode of diode D8, cathode of the anode of diode D5 also with diode D7
Connection, the anode of diode D5 are also connect with the cathode of diode D4, and the anode of diode D4 is connect with the cathode of diode D3,
The anode of diode D3 is connect with the base stage of triode VT4, and the anode of diode D3 is connect with the collector of triode VT2, electricity
Hold one end ground connection of C6, the other end of capacitor C6 is connect with the collector of triode VT2, one end of resistance R9 and triode VT2
Emitter connection, the other end of resistance R9 connect with the drain electrode of field-effect tube VT1, the other end of resistance R9 also with+15V power supply
Connection, the collector of triode VT5 are connect with -15V power supply, and the emitter of triode VT5 is connect with the base stage of triode VT7,
The emitter of triode VT5 is also connect with one end of resistance R11, and the other end of resistance R11 and the emitter of triode VT4 connect
It connecing, the emitter of triode VT4 is also connect with the base stage of triode VT6, and the collector of triode VT4 is connect with+15V power supply,
The collector of triode VT7 is connect with -15V power supply, and the collector of triode VT7 is connect with one end of resistance R13, resistance R13
The other end connect with the cathode of diode D8, the other end of resistance R13 is connect with the anode of diode D7, the one of resistance R14
End ground connection, the other end of resistance R13 are connect with the other end of resistance R14, the one end of the other end of resistance R13 also with resistance R12
Connection, the other end of resistance R12 connect with the emitter of triode VT6, and one end of capacitor C8 is grounded, the other end of capacitor C8 and
The connection of+15V power supply, the other end of capacitor C8 are also connect with the collector of triode VT4, and the other end and signal of resistance R14 is filtered
The input terminal of wave unit connects, and signal amplification unit output signal is V01.
Preferably, signal filter unit includes resistance R15-R24, capacitor C10-C11 and integrated transporting discharging A2-A5.
Wherein, the output end of signal amplification unit is connect with one end of resistance R16, the other end of resistance R16 and integrated fortune
The inverting input terminal connection of A2 is put, one end of resistance R15 is connect with one end of resistance R22, the other end and resistance of resistance R15
One end of R16 connects, and the other end of resistance R16 is connect with one end of capacitor C10, the other end of resistance R16 and the one of resistance R17
End connection, the other end of resistance R16 are also connect with one end of resistance R18, the non-inverting input terminal ground connection of integrated transporting discharging A2, resistance
One end of R22 is connect with the inverting input terminal of integrated transporting discharging A5, and the other end of resistance R22 and the output end of integrated transporting discharging A2 connect
It connects, resistance R22 is also connect with the other end of capacitor C10, and the other end of resistance R17 is connect with the other end of capacitor C10, capacitor
The other end of C10 is connect with the output end of integrated transporting discharging A2, and one end of resistance R19 is connect with the output end of integrated transporting discharging A2, electricity
The other end of resistance R19 is connect with the inverting input terminal of integrated transporting discharging A3, the non-inverting input terminal ground connection of integrated transporting discharging A3, resistance R19
The other end connect with one end of capacitor C11, the output end of capacitor C11 is connect with one end of resistance R20, and integrated transporting discharging A3's is defeated
Outlet is connect with one end of resistance R20, and the other end of resistance R20 is connect with the inverting input terminal of integrated transporting discharging A4, resistance R20's
The other end is connect with one end of resistance R21, and the other end of resistance R21 is connect with the other end of resistance R18, and resistance R21's is another
End also connect with the output end of integrated transporting discharging A4, one end of resistance R23 is connect with one end of resistance R22, one end of point R23 also with
One end of resistance R24 connects, and the output end of integrated transporting discharging A3 and the output end of integrated transporting discharging A4 pass through single-pole double-throw switch (SPDT) and electricity
The other end connection of R23 is hindered, the other end of resistance R24 is connect with the output end of integrated transporting discharging A5, and integrated transporting discharging A5's is same mutually defeated
Enter end ground connection, the input terminal of the output end of integrated transporting discharging A5 and central processing unit connects, and signal filter unit is by voltage signal
V1 is transmitted to the port ADC of central processing unit.
Preferably, central processing unit is STM32 single-chip microcontroller.
Preferably, display unit is LCD display device.
Preferably, mobile terminal unit is user mobile phone.
Compared with prior art, the present invention have it is following the utility model has the advantages that
(1) present invention provides a kind of agricultural product quality monitoring system based on sensing network, utilizes water content detection sensor, signal
Processing circuit, laser receiver, optical spectrum imagers, vibrating sensor, display unit, central processing unit, trigger unit,
One quality inspection unit, the second quality inspection unit, mechanical clamping device, wireless transmission unit, mobile terminal unit, data storage cell,
Light source, generating device of laser and transmission belt detect the quality of agricultural product to be measured, wherein using optical spectrum imagers to agriculture
The spectrum picture of product is monitored, while being monitored using moisture information of the water content detection sensor to agricultural product to be measured,
The detection accuracy to agricultural product to be measured can be greatly improved using two kinds of detection modes, further, uses signal processing electricity
The signal that road acquires water content detection sensor is handled, and further increases the precision to agricultural product water content detection to be measured, together
When, in order to reduce the vibration that transmission belt passes to agricultural product to be measured, using the vibration signal of vibrating sensor acquisition transmission belt, if
Vibration signal is greater than threshold value, then is gripped using mechanical clamping device to agricultural product to be measured, further improve and treat
Survey the precision of agricultural product spectrum picture detection.
(2) a kind of agricultural product quality based on sensing network provided by the invention monitors system, and inventive point of the invention is also
It is that the signal acquired due to water content detection sensor is faint current signal, thus signal amplification unit passes through integrated transporting discharging
A1, capacitor C1-C9, field-effect tube VT1, triode VT2-VT7, diode D1-D8 and resistance R1-R14 sense water content detection
Device output electric current I0 amplify processing, by integrated transporting discharging A1, capacitor C1-C9, field-effect tube VT1, triode VT2-VT7,
The signal amplification unit that diode D1-D8 and resistance R1-R14 are constituted only have offset within the drift of 1.05 μ V/ DEG C, 2 μ V,
The noise of 1.65nV in 100pA bias current and the broadband 0.1Hz to 10Hz.Wherein, signal filter unit uses resistance R15-
R24, capacitor C10-C11 and integrated transporting discharging A2-A5 are to being filtered by amplified electric signal, to improve pair
The precision of the water content detection of agricultural product to be measured.
Detailed description of the invention
Fig. 1 is the functional diagram that the agricultural product quality of the invention based on sensing network monitors system；
Fig. 2 is the structure chart that the agricultural product quality of the invention based on sensing network monitors system；
Fig. 3 is the circuit diagram of signal processing circuit of the invention.
Appended drawing reference:
1- optical spectrum imagers；2- light source；3- agricultural product to be measured；4- generating device of laser；5- laser receiver；6- vibrating sensing
Device；7- transmission belt.
Specific embodiment
With reference to the accompanying drawings and examples agricultural product quality to provided by the invention based on sensing network monitor system into
Row is described in detail.
As shown in Figs. 1-2, the agricultural product quality monitoring system provided by the invention based on sensing network includes water content detection
Sensor, signal processing circuit, laser receiver 5, optical spectrum imagers 1, vibrating sensor 6, display unit, central processing dress
Set, trigger unit, the first quality inspection unit, the second quality inspection unit, mechanical clamping device, wireless transmission unit, mobile terminal unit,
Data storage cell, light source 2, generating device of laser 4 and transmission belt 7.
Wherein, agricultural product 3 to be measured are placed in transmission belt 7, the output end and signal processing circuit of water content detection sensor
Input terminal connection, the output end of laser receiver 5, the output end of signal processing circuit, optical spectrum imagers 1 output end with
And the output end of vibrating sensor 6 is connect with the input terminal of central processing unit, trigger unit is connect with optical spectrum imagers 1,
The input terminal of transmission belt 7, the input terminal of display unit, the input terminal of trigger unit, the input terminal of the first quality inspection unit, the second matter
The input terminal of the input terminal and mechanical clamping device of examining unit is connect with the output end of central processing unit, the first quality inspection list
Member and the second quality inspection unit pass through wireless transmission unit and connect with mobile terminal unit, the first quality inspection unit and the second quality inspection list
Member is connect by wireless transmission unit with data storage cell.
Water content detection sensor is used to detect the moisture information of agricultural product 3 to be measured, and moisture information is converted to electric current letter
Signal processing circuit is transmitted to after number, for emitting laser beams, laser receiver 5 is for receiving laser for generating device of laser 4
The laser beam that generating device 4 issues, optical spectrum imagers 1 are used to acquire the spectrum picture of agricultural product 3 to be measured, and light source 2 is for providing
Illumination, vibrating sensor 6 are set to 7 bottom of transmission belt, and vibrating sensor 6 is used to acquire the vibration signal of transmission belt 7.
Agricultural product 3 to be measured are placed in transmission belt 7, are believed using the moisture that water content detection sensor detects agricultural product 3 to be measured
Breath, and it is transmitted to signal processing circuit after moisture information is converted to current signal, signal processing circuit is to the electric current received
Signal is converted to voltage signal after carrying out signal processing and is transmitted to central processing unit, the electricity that central processing unit will receive
Pressure signal is converted to the moisture informations of agricultural product 3 to be measured, and transmission belt 7 transmits agricultural product 3 to be measured to moving immediately below optical spectrum imagers 1
Dynamic, when laser receiver 5 does not receive the laser beam of the sending of generating device of laser 4, laser receiver 5 sends the first touching
It signals to central processing unit, control transmission belt 7 stops operation after central processing unit receives the first trigger signal, vibrates
Sensor 6 acquires the vibration signal of transmission belt 7, and vibration signal is transmitted to central processing unit, and central processing unit will connect
The vibration signal received is compared with the vibration threshold being stored in the memory module in central processing unit, if central processing
The vibration signal that device receives is less than or equal to vibration threshold, then central processing unit controls trigger unit to optical spectrum imagers 1
The second trigger signal is issued, optical spectrum imagers 1 acquire 3 spectrum picture of agricultural product to be measured after receiving the second trigger signal, and will
Spectrum picture is transmitted to central processing unit, if the vibration signal that central processing unit receives is greater than vibration threshold, center
Processing unit control mechanical clamping device, which grips agricultural product 3 to be measured, is transferred to agricultural product 3 to be measured with less transmission belt 7
Vibration, after central processing unit control mechanical clamping device grips agricultural product 3 to be measured, central processing unit control touching
Bill member issues the second trigger signal to optical spectrum imagers 1, and optical spectrum imagers 1 acquire agriculture to be measured after receiving the second trigger signal
3 spectrum picture of product, and spectrum picture is transmitted to central processing unit, central processing unit by the moisture information received and
Transfer spectral information to display unit is shown that central processing unit will receive moisture information and be transmitted to the first quality inspection list
Member, the moisture information received is compared by the first quality inspection unit with Soil Moisture Threshold, and comparison result is passed through wireless transmission
Unit is transmitted to mobile terminal unit and data storage cell, and the spectrum picture received is transmitted to second by central processing unit
Quality inspection unit, the second quality inspection unit are compared according to the spectrum picture received with standard spectrum image, and by comparison result
Mobile terminal unit and data storage cell are transmitted to by wireless transmission unit.
In above embodiment, water content detection sensor, signal processing circuit, laser receiver 5, light spectrum image-forming are utilized
Instrument 1, vibrating sensor 6, display unit, central processing unit, trigger unit, the first quality inspection unit, the second quality inspection unit, machinery
Clamping device, wireless transmission unit, mobile terminal unit, data storage cell, light source 2, generating device of laser 4 and transmission belt
The quality of 7 pairs of agricultural product 3 to be measured detects, wherein being monitored using spectrum picture of the optical spectrum imagers 1 to agricultural product, together
When be monitored using moisture information of the water content detection sensor to agricultural product 3 to be measured, can be significantly using two kinds of detection modes
Raising further acquires the detection accuracy of agricultural product 3 to be measured using signal processing circuit to water content detection sensor
Signal is handled, and the precision to 3 water content detection of agricultural product to be measured is further increased, meanwhile, it is passed to reduce transmission belt 7
The vibration of agricultural product to be measured acquires the vibration signal of transmission belt using vibrating sensor 6, if vibration signal is greater than threshold value, makes
Agricultural product 3 to be measured are gripped with mechanical clamping device, further improves and 3 spectrum picture of agricultural product to be measured is detected
Precision.
Further, central processing unit will receive moisture information and be transmitted to the first quality inspection unit, the first quality inspection list
The moisture information received is compared by member with Soil Moisture Threshold, obtains the moisture information of agricultural product 3 to be measured, the first quality inspection unit
It is inside stored with the standard moisture value with the congener agricultural product of agricultural product to be measured, and using this moisture value as Soil Moisture Threshold.
Further, the spectrum picture received is transmitted to the second quality inspection unit, the second quality inspection by central processing unit
Unit is compared according to the spectrum picture received with standard spectrum image, and the second quality inspection element memory contains and agricultural production to be measured
The standard spectrum image of the congener agricultural product of product can know agricultural product to be detected by the comparison with standard spectrum image
The information such as whether pesticide exceeded.
Specifically, optical spectrum imagers 1 are set to the surface of transmission belt 7.
Specifically, the quantity of light source 2 is 2.
Specifically, agricultural product 3 to be measured are placed in transmission belt 7, detect agricultural product 3 to be measured using water content detection sensor
Moisture information, and moisture information is converted to and is transmitted to signal processing circuit after current signal, signal processing circuit is to receiving
Current signal successively carry out signal amplification and signal filtering processing after be converted to voltage signal and be transmitted to central processing unit.
As shown in figure 3, water content detection sensor detects the moisture information of agricultural product 3 to be measured, by the agricultural product to be measured 3 of acquisition
Moisture signal be converted to current signal I0, and current signal I0 is transmitted to signal processing circuit, V1 is by signal processing
Voltage signal after processing of circuit, signal processing circuit include signal amplification unit and signal filter unit, water content detection sensing
The output end of device and the input terminal of signal amplification unit connect, the input of the output end and signal filter unit of signal amplification unit
End connection, the output end of signal filter unit and the input terminal of central processing unit connect.
Specifically, signal amplification unit includes integrated transporting discharging A1, capacitor C1-C9, field-effect tube VT1, triode VT2-
VT7, diode D1-D8 and resistance R1-R14.
Wherein, the output end of water content detection sensor is connect with one end of resistance R1, the other end and resistance R3 of resistance R1
One end connection, the other end of resistance R1 also connect with one end of resistance R2, and one end of capacitor C1 is connect with one end of resistance R2,
The other end of capacitor C1 is connect with the other end of resistance R2, and the other end of resistance R3 and the non-inverting input terminal of integrated transporting discharging A1 connect
It connects, one end of capacitor C2 is connect with the inverting input terminal of integrated transporting discharging A1, the same phase of the other end and integrated transporting discharging A1 of capacitor C2
Input terminal connection, one end of the reverse inter-input-ing ending grounding of integrated transporting discharging A1, resistance R2 are connect with the grid of field-effect tube VT1, electricity
One end of resistance R4 is connect with -15V power supply, and the other end of resistance R4 is connect with the source electrode of field-effect tube VT1, the other end of resistance R4
It is connect with one end of capacitor C3, the other end of resistance R4 is also connect with the output end of integrated transporting discharging A1, the drain electrode of field-effect tube VT1
It is connect with the anode of diode D1, one end of resistance R5 is connect with the other end of capacitor C3, the cathode and resistance R5 of diode D1
Other end connection, the cathode of diode D2 connect with -15V power supply, and the anode of diode D2 is connect with one end of resistance R8, electric
The one end for holding C4 is connect with the output end of integrated transporting discharging A1, and the other end of resistance R8 is connect with the other end of capacitor C4, resistance R7
One end connect with the other end of resistance R8, the other end of resistance R7 is connect with the output end of integrated transporting discharging A1, the one of resistance R6
End connect with the other end of resistance R7, the other end of resistance R6 is connect with one end of resistance R5, one end of resistance R5 also with three poles
The base stage of pipe VT2 connects, and one end of capacitor C5 is connect with the base stage of triode VT3, and the other end of capacitor C5 is with triode VT2's
Base stage connection, one end of resistance R10 are connect with -15V power supply, and the one end capacitor C7 ground connection, the other end of resistance R10 is with capacitor C7's
Other end connection, the other end of resistance R10 are also connect with the emitter of triode VT3, the cathode and triode VT3 of diode D6
Collector connection, the cathode of diode D6 also connect with the base stage of triode VT5, and the cathode of diode D5 is with diode D6's
Anode connection, the anode of diode D5 are connect with the anode of diode D8, cathode of the anode of diode D5 also with diode D7
Connection, the anode of diode D5 are also connect with the cathode of diode D4, and the anode of diode D4 is connect with the cathode of diode D3,
The anode of diode D3 is connect with the base stage of triode VT4, and the anode of diode D3 is connect with the collector of triode VT2, electricity
Hold one end ground connection of C6, the other end of capacitor C6 is connect with the collector of triode VT2, one end of resistance R9 and triode VT2
Emitter connection, the other end of resistance R9 connect with the drain electrode of field-effect tube VT1, the other end of resistance R9 also with+15V power supply
Connection, the collector of triode VT5 are connect with -15V power supply, and the emitter of triode VT5 is connect with the base stage of triode VT7,
The emitter of triode VT5 is also connect with one end of resistance R11, and the other end of resistance R11 and the emitter of triode VT4 connect
It connecing, the emitter of triode VT4 is also connect with the base stage of triode VT6, and the collector of triode VT4 is connect with+15V power supply,
The collector of triode VT7 is connect with -15V power supply, and the collector of triode VT7 is connect with one end of resistance R13, resistance R13
The other end connect with the cathode of diode D8, the other end of resistance R13 is connect with the anode of diode D7, the one of resistance R14
End ground connection, the other end of resistance R13 are connect with the other end of resistance R14, the one end of the other end of resistance R13 also with resistance R12
Connection, the other end of resistance R12 connect with the emitter of triode VT6, and one end of capacitor C8 is grounded, the other end of capacitor C8 and
The connection of+15V power supply, the other end of capacitor C8 are also connect with the collector of triode VT4, and the other end and signal of resistance R14 is filtered
The input terminal of wave unit connects, and signal amplification unit output signal is V01.
In above embodiment, the noise of signal processing circuit drifts about within 1.65nV as 1.05 μ V/ DEG C, integrated fortune
The model for putting A1 is LT1012, the model 2N5486 of the model LT1192 of integrated transporting discharging A2-A5, field-effect tube VT1, and three
The model of pole pipe VT2, VT5 and VT7 are 2N5160, and the model of triode VT3, VT4 and VT6 are 2N3866, diode D1-
The model of D8 is 1N4148.
In signal amplification unit, the resistance value of resistance R1 is 1k Ω, and the resistance value of resistance R2 is 1k Ω, and the resistance value of resistance R3 is
The resistance value of 10k Ω, resistance R4 are 3.3k Ω, and the resistance value of resistance R5 is 3.9k Ω, and the resistance value of resistance R6 is 30k Ω, resistance R7's
Resistance value is 30k Ω, and the resistance value of resistance R8 is 3.9k Ω, and the resistance value of resistance R9 is 300 Ω, and the resistance value of resistance R10 is 300 Ω, electricity
The resistance value for hindering R11 is 470 Ω, and the resistance value of resistance R12 is 10 Ω, and the resistance value of resistance R13 is 10 Ω, and the resistance value of resistance R14 is 50
The capacitance of Ω, capacitor C1 are 8pF, and the capacitance of capacitor C2 is 39pF, and the capacitance of capacitor C3 is 0.01 μ F, the electricity of capacitor C4
Capacitance is 0.01 μ F, and the capacitance of capacitor C5 is 0.001 μ F, and the capacitance of capacitor C6 is 15pF, and the capacitance of capacitor C7 is
The capacitance of 150pF, capacitor C8 are 8.2 μ F, and the capacitance of capacitor C9 is 8.2 μ F.
In the prior art, output stage is placed on the feedback loop of amplifier amplifier by signal amplification circuit, though it can be true
Low drifting and gain stability are protected, but the speed of operational amplifier also accordingly has received limitation.
In the signal amplification unit of the present embodiment, missed using the direct current that integrated transporting discharging A1 corrects for signal amplification unit
Difference, therefore will effectively contain high-frequency signal, signal by field-effect tube VT1 and coupled capacitor C3, directly by signal export to
In amplifying circuit, therefore, obtain signal amplification unit preferable
Bandwidth performance, the raising of the output electric current and revolving speed of integrated transporting discharging A1 is effective.
The output stage of signal amplification unit can be divided into three parts, wherein triode VT2-VT3 is as current source, three poles
Driving force of the pipe VT4-VT6 as signal amplification unit, triode VT5-VT7 is as complementary emission device, in signal amplification unit
The transistor frequency used works as transistor so that the speed of signal amplification unit processing signal greatly improves close to 1GHz
Output electric current when being more than 250mA, the diode net (i.e. diode D3-D6) of output end is controlled, no longer driving transistor
Base stage realizes the short-circuit protection of signal amplification unit in the present embodiment.
In the signal amplification unit of the present embodiment, the combination of integrated transporting discharging A1 and resistance R1, R3 form signal amplification
The high frequency node of unit.
Signal amplification unit realizes minimum AC response distortion, when signal amplification unit handles signal,
In, stability of the feedback capacity C1 to optimize signal amplification unit.
The output voltage signal of signal amplification unit is V01.
Specifically, signal filter unit includes resistance R15-R24, capacitor C10-C11 and integrated transporting discharging A2-A5.
Wherein, the output end of signal amplification unit is connect with one end of resistance R16, the other end of resistance R16 and integrated fortune
The inverting input terminal connection of A2 is put, one end of resistance R15 is connect with one end of resistance R22, the other end and resistance of resistance R15
One end of R16 connects, and the other end of resistance R16 is connect with one end of capacitor C10, the other end of resistance R16 and the one of resistance R17
End connection, the other end of resistance R16 are also connect with one end of resistance R18, the non-inverting input terminal ground connection of integrated transporting discharging A2, resistance
One end of R22 is connect with the inverting input terminal of integrated transporting discharging A5, and the other end of resistance R22 and the output end of integrated transporting discharging A2 connect
It connects, resistance R22 is also connect with the other end of capacitor C10, and the other end of resistance R17 is connect with the other end of capacitor C10, capacitor
The other end of C10 is connect with the output end of integrated transporting discharging A2, and one end of resistance R19 is connect with the output end of integrated transporting discharging A2, electricity
The other end of resistance R19 is connect with the inverting input terminal of integrated transporting discharging A3, the non-inverting input terminal ground connection of integrated transporting discharging A3, resistance R19
The other end connect with one end of capacitor C11, the output end of capacitor C11 is connect with one end of resistance R20, and integrated transporting discharging A3's is defeated
Outlet is connect with one end of resistance R20, and the other end of resistance R20 is connect with the inverting input terminal of integrated transporting discharging A4, resistance R20's
The other end is connect with one end of resistance R21, and the other end of resistance R21 is connect with the other end of resistance R18, and resistance R21's is another
End also connect with the output end of integrated transporting discharging A4, one end of resistance R23 is connect with one end of resistance R22, one end of point R23 also with
One end of resistance R24 connects, and the output end of integrated transporting discharging A3 and the output end of integrated transporting discharging A4 pass through single-pole double-throw switch (SPDT) and electricity
The other end connection of R23 is hindered, the other end of resistance R24 is connect with the output end of integrated transporting discharging A5, and integrated transporting discharging A5's is same mutually defeated
Enter end ground connection, the input terminal of the output end of integrated transporting discharging A5 and central processing unit connects, and signal filter unit is by voltage signal
V1 is transmitted to the port ADC of central processing unit.
In signal filter unit, resistance value, the capacitance of capacitor C10-C11 of resistance R15-R24 is according to filtering demands
It is configured.
Wherein, the output voltage signal of integrated transporting discharging A2 is V02, and the output forging and stamping signal of integrated transporting discharging A3 is V03, signal
The output signal of filter unit is V1.
It analyzes:
；
Wherein, in above formula ± depend on single-pole double-throw switch (SPDT) position.
Frequency filtering is, filtered quality parameters Q,
Wherein,；。
The resistance value of preferably one group resistance R15-R24, the value of the capacitance of capacitor C10-C11 in the present embodiment, wherein resistance
The resistance value of R15 is 100k Ω, and the resistance value of resistance R16 is 158k Ω, and the resistance value of resistance R17 is 158k Ω, and the resistance value of resistance R18 is
The resistance value of 15.8k Ω, resistance R19 are 15.8k Ω, and the resistance value of resistance R20 is 100k Ω, and the resistance value of resistance R21 is 100k Ω, electricity
The resistance value for hindering R22 is 100k Ω, and the resistance value of resistance R23 is 3.32k Ω, and the resistance value of resistance R24 is 24.9k Ω, the electricity of capacitor C10
Capacitance is 10nF, and the capacitance of capacitor C11 is 10nF.
Since the signal of water content detection sensor acquisition is faint current signal, thus signal amplification unit is by integrating
Amplifier A1, capacitor C1-C9, field-effect tube VT1, triode VT2-VT7, diode D1-D8 and resistance R1-R14 are to water content detection
The electric current I0 of sensor output amplifies processing, by integrated transporting discharging A1, capacitor C1-C9, field-effect tube VT1, triode VT2-
The signal amplification unit that VT7, diode D1-D8 and resistance R1-R14 are constituted only has inclined within the drift of 1.05 μ V/ DEG C, 2 μ V
The noise of 1.65nV in shifting, 100pA bias current and the broadband 0.1Hz to 10Hz.Wherein, signal filter unit uses resistance R15-
R24, capacitor C10-C11 and integrated transporting discharging A2-A5 are to being filtered by amplified electric signal, to improve pair
The precision of the water content detection of agricultural product to be measured.
Specifically, central processing unit is STM32 single-chip microcontroller.
Specifically, display unit is LCD display device.
Specifically, mobile terminal unit is user mobile phone.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (10)
1. a kind of agricultural product quality based on sensing network monitors system, which is characterized in that the agricultural production based on sensing network
Quality monitoring system include water content detection sensor, signal processing circuit, laser receiver (5), optical spectrum imagers (1),
Vibrating sensor (6), display unit, central processing unit, trigger unit, the first quality inspection unit, the second quality inspection unit, mechanical folder
Hold device, wireless transmission unit, mobile terminal unit, data storage cell, light source (2), generating device of laser (4) and transmission
Band (7)；
Wherein, agricultural product (3) to be measured are placed on the transmission belt (7), the output end of the water content detection sensor with it is described
The input terminal of signal processing circuit connects, the output of the output end, the signal processing circuit of the laser receiver (5)
End, the output end of the optical spectrum imagers (1) and the vibrating sensor (6) output end with the central processing unit
Input terminal connection, the trigger unit connect with the optical spectrum imagers (1), and the input terminal of the transmission belt (7) described is shown
Show the input terminal of unit, the input terminal of the trigger unit, the input terminal of the first quality inspection unit, the second quality inspection unit
Input terminal and the input terminal of the mechanical clamping device connect with the output end of the central processing unit, described first
Quality inspection unit and the second quality inspection unit are connect by the wireless transmission unit with the mobile terminal unit, and described
One quality inspection unit and the second quality inspection unit are connect by the wireless transmission unit with the data storage cell；
The water content detection sensor is used to detect the moisture information of the agricultural product to be measured (3), and moisture information is converted to
The signal processing circuit is transmitted to after current signal, for emitting laser beams, the laser connects the generating device of laser (4)
Receiving apparatus (5) is used to receive the laser beam of the generating device of laser (4) sending, and the optical spectrum imagers (1) are for acquiring institute
The spectrum picture of agricultural product to be measured (3) is stated, the light source (2) is set to described for providing illumination, the vibrating sensor (6)
Transmission belt (7) bottom, the vibrating sensor (6) are used to acquire the vibration signal of the transmission belt (7)；
The agricultural product to be measured (3) are placed on the transmission belt (7), are detected using the water content detection sensor described to be measured
The moisture information of agricultural product (3), and the signal processing circuit, the letter are transmitted to after moisture information is converted to current signal
Number processing circuit is converted to voltage signal after carrying out signal processing to the current signal received and is transmitted to the central processing
The voltage signal received is converted to the moisture information of agricultural product to be measured (3), the transmission by device, the central processing unit
It is mobile immediately below band (7) transmission agricultural product (3) the Xiang Suoshu optical spectrum imagers (1) to be measured, when the laser receiver (5)
When not receiving the laser beam of the generating device of laser (4) sending, the laser receiver (5) sends the first trigger signal
To the central processing unit, the central processing unit controls the transmission belt (7) after receiving first trigger signal
It stops operation, the vibrating sensor (6) acquires the vibration signal of the transmission belt (7), and vibration signal is transmitted to described
Central processing unit, the central processing unit by the vibration signal received be stored in depositing in the central processing unit
Vibration threshold in storage module is compared, if the vibration signal that the central processing unit receives is less than or equal to vibration threshold
Value, then the central processing unit controls the trigger unit and issues the second trigger signal to the optical spectrum imagers (1), described
Optical spectrum imagers (1) acquire agricultural product to be measured (3) spectrum picture after receiving the second trigger signal, and spectrum picture is passed
Transport to the central processing unit, if the vibration signal that receives of the central processing unit is greater than vibration threshold, it is described in
Centre processing unit controls the mechanical clamping device and grips the agricultural product (3) to be measured with the less transmission belt (7)
Be transferred to the vibration of the agricultural product to be measured (3), the central processing unit control the mechanical clamping device will it is described to
After survey agricultural product (3) grips, the central processing unit controls the trigger unit and issues to the optical spectrum imagers (1)
Second trigger signal, the optical spectrum imagers (1) acquire agricultural product to be measured (3) spectrogram after receiving the second trigger signal
Picture, and spectrum picture is transmitted to the central processing unit, the central processing unit is by the moisture information received and light
Spectrum information is transmitted to the display unit and is shown, the central processing unit will receive moisture information and be transmitted to described
The moisture information received is compared by one quality inspection unit, the first quality inspection unit with Soil Moisture Threshold, and by comparison result
The mobile terminal unit and the data storage cell, the central processing unit are transmitted to by the wireless transmission unit
The spectrum picture received is transmitted to the second quality inspection unit, the second quality inspection unit is according to the spectrum picture and mark received
Quasi- spectrum picture is compared, and comparison result is transmitted to the mobile terminal unit and institute by the wireless transmission unit
State data storage cell.
2. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that the spectrum
Imager (1) is set to the surface of the transmission belt (7).
3. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that the light source
(2) quantity is 2.
4. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that described to be measured
Agricultural product (3) are placed on the transmission belt (7), detect the agricultural product (3) to be measured using the water content detection sensor
Moisture information, and the signal processing circuit, the signal processing circuit are transmitted to after moisture information is converted to current signal
Voltage signal is converted to after successively carrying out signal amplification and signal filtering processing to the current signal received and is transmitted to described
Central processing unit.
5. the agricultural product quality according to claim 1 or 4 based on sensing network monitors system, which is characterized in that described
Water content detection sensor detects the moisture information of the agricultural product (3) to be measured, by the moisture of the agricultural product (3) to be measured of acquisition
Signal is converted to current signal I0, and current signal I0 is transmitted to the signal processing circuit, and V1 is by the signal
Voltage signal after managing processing of circuit, the signal processing circuit includes signal amplification unit and signal filter unit, the water
The output end of point detection sensor is connect with the input terminal of the signal amplification unit, the output end of the signal amplification unit and
The input terminal of the signal filter unit connects, the input of the output end and the central processing unit of the signal filter unit
End connection.
6. the agricultural product quality according to claim 5 based on sensing network monitors system, which is characterized in that the signal
Amplifying unit includes integrated transporting discharging A1, capacitor C1-C9, field-effect tube VT1, triode VT2-VT7, diode D1-D8 and resistance
R1-R14；
Wherein, the output end of the water content detection sensor is connect with one end of resistance R1, the other end and resistance R3 of resistance R1
One end connection, the other end of resistance R1 also connect with one end of resistance R2, and one end of capacitor C1 is connect with one end of resistance R2,
The other end of capacitor C1 is connect with the other end of resistance R2, and the other end of resistance R3 and the non-inverting input terminal of integrated transporting discharging A1 connect
It connects, one end of capacitor C2 is connect with the inverting input terminal of integrated transporting discharging A1, the same phase of the other end and integrated transporting discharging A1 of capacitor C2
Input terminal connection, one end of the reverse inter-input-ing ending grounding of integrated transporting discharging A1, resistance R2 are connect with the grid of field-effect tube VT1, electricity
One end of resistance R4 is connect with -15V power supply, and the other end of resistance R4 is connect with the source electrode of field-effect tube VT1, the other end of resistance R4
It is connect with one end of capacitor C3, the other end of resistance R4 is also connect with the output end of integrated transporting discharging A1, the drain electrode of field-effect tube VT1
It is connect with the anode of diode D1, one end of resistance R5 is connect with the other end of capacitor C3, the cathode and resistance R5 of diode D1
Other end connection, the cathode of diode D2 connect with -15V power supply, and the anode of diode D2 is connect with one end of resistance R8, electric
The one end for holding C4 is connect with the output end of integrated transporting discharging A1, and the other end of resistance R8 is connect with the other end of capacitor C4, resistance R7
One end connect with the other end of resistance R8, the other end of resistance R7 is connect with the output end of integrated transporting discharging A1, the one of resistance R6
End connect with the other end of resistance R7, the other end of resistance R6 is connect with one end of resistance R5, one end of resistance R5 also with three poles
The base stage of pipe VT2 connects, and one end of capacitor C5 is connect with the base stage of triode VT3, and the other end of capacitor C5 is with triode VT2's
Base stage connection, one end of resistance R10 are connect with -15V power supply, and the one end capacitor C7 ground connection, the other end of resistance R10 is with capacitor C7's
Other end connection, the other end of resistance R10 are also connect with the emitter of triode VT3, the cathode and triode VT3 of diode D6
Collector connection, the cathode of diode D6 also connect with the base stage of triode VT5, and the cathode of diode D5 is with diode D6's
Anode connection, the anode of diode D5 are connect with the anode of diode D8, cathode of the anode of diode D5 also with diode D7
Connection, the anode of diode D5 are also connect with the cathode of diode D4, and the anode of diode D4 is connect with the cathode of diode D3,
The anode of diode D3 is connect with the base stage of triode VT4, and the anode of diode D3 is connect with the collector of triode VT2, electricity
Hold one end ground connection of C6, the other end of capacitor C6 is connect with the collector of triode VT2, one end of resistance R9 and triode VT2
Emitter connection, the other end of resistance R9 connect with the drain electrode of field-effect tube VT1, the other end of resistance R9 also with+15V power supply
Connection, the collector of triode VT5 are connect with -15V power supply, and the emitter of triode VT5 is connect with the base stage of triode VT7,
The emitter of triode VT5 is also connect with one end of resistance R11, and the other end of resistance R11 and the emitter of triode VT4 connect
It connecing, the emitter of triode VT4 is also connect with the base stage of triode VT6, and the collector of triode VT4 is connect with+15V power supply,
The collector of triode VT7 is connect with -15V power supply, and the collector of triode VT7 is connect with one end of resistance R13, resistance R13
The other end connect with the cathode of diode D8, the other end of resistance R13 is connect with the anode of diode D7, the one of resistance R14
End ground connection, the other end of resistance R13 are connect with the other end of resistance R14, the one end of the other end of resistance R13 also with resistance R12
Connection, the other end of resistance R12 connect with the emitter of triode VT6, and one end of capacitor C8 is grounded, the other end of capacitor C8 and
The connection of+15V power supply, the other end of capacitor C8 are also connect with the collector of triode VT4, the other end of resistance R14 and the letter
The input terminal connection of number filter unit, the signal amplification unit output signal are V01.
7. the agricultural product quality according to claim 6 based on sensing network monitors system, which is characterized in that the signal
Filter unit includes resistance R15-R24, capacitor C10-C11 and integrated transporting discharging A2-A5；
Wherein, the output end of the signal amplification unit is connect with one end of resistance R16, the other end of resistance R16 and integrated fortune
The inverting input terminal connection of A2 is put, one end of resistance R15 is connect with one end of resistance R22, the other end and resistance of resistance R15
One end of R16 connects, and the other end of resistance R16 is connect with one end of capacitor C10, the other end of resistance R16 and the one of resistance R17
End connection, the other end of resistance R16 are also connect with one end of resistance R18, the non-inverting input terminal ground connection of integrated transporting discharging A2, resistance
One end of R22 is connect with the inverting input terminal of integrated transporting discharging A5, and the other end of resistance R22 and the output end of integrated transporting discharging A2 connect
It connects, resistance R22 is also connect with the other end of capacitor C10, and the other end of resistance R17 is connect with the other end of capacitor C10, capacitor
The other end of C10 is connect with the output end of integrated transporting discharging A2, and one end of resistance R19 is connect with the output end of integrated transporting discharging A2, electricity
The other end of resistance R19 is connect with the inverting input terminal of integrated transporting discharging A3, the non-inverting input terminal ground connection of integrated transporting discharging A3, resistance R19
The other end connect with one end of capacitor C11, the output end of capacitor C11 is connect with one end of resistance R20, and integrated transporting discharging A3's is defeated
Outlet is connect with one end of resistance R20, and the other end of resistance R20 is connect with the inverting input terminal of integrated transporting discharging A4, resistance R20's
The other end is connect with one end of resistance R21, and the other end of resistance R21 is connect with the other end of resistance R18, and resistance R21's is another
End also connect with the output end of integrated transporting discharging A4, one end of resistance R23 is connect with one end of resistance R22, one end of point R23 also with
One end of resistance R24 connects, and the output end of integrated transporting discharging A3 and the output end of integrated transporting discharging A4 pass through single-pole double-throw switch (SPDT) and electricity
The other end connection of R23 is hindered, the other end of resistance R24 is connect with the output end of integrated transporting discharging A5, and integrated transporting discharging A5's is same mutually defeated
Enter end ground connection, the output end of integrated transporting discharging A5 is connect with the input terminal of the central processing unit, and the signal filter unit will
Voltage signal V1 is transmitted to the port ADC of the central processing unit.
8. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that the center
Processing unit is STM32 single-chip microcontroller.
9. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that the display
Unit is LCD display device.
10. the agricultural product quality according to claim 1 based on sensing network monitors system, which is characterized in that the shifting
Dynamic terminal unit is user mobile phone.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702863A (en) * | 2019-10-29 | 2020-01-17 | 建湖县农产品质量安全监督管理站 | Automatic detection device for agricultural products |
| CN110726730A (en) * | 2019-11-05 | 2020-01-24 | 韩向东 | Self-adaptive transmission detection device |
| CN114414489A (en) * | 2022-01-26 | 2022-04-29 | 黄淮学院 | SF6 gas optical sensing information monitoring system |
-
2019
- 2019-07-12 CN CN201910632113.6A patent/CN110261325A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702863A (en) * | 2019-10-29 | 2020-01-17 | 建湖县农产品质量安全监督管理站 | Automatic detection device for agricultural products |
| CN110726730A (en) * | 2019-11-05 | 2020-01-24 | 韩向东 | Self-adaptive transmission detection device |
| CN110726730B (en) * | 2019-11-05 | 2022-12-06 | 黑龙江瑞兴科技股份有限公司 | Self-adaptive transmission detection device |
| CN114414489A (en) * | 2022-01-26 | 2022-04-29 | 黄淮学院 | SF6 gas optical sensing information monitoring system |
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Application publication date: 20190920 |
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