CN105954329A - Granular food humidity detection system based on buffering protection circuit - Google Patents
Granular food humidity detection system based on buffering protection circuit Download PDFInfo
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- CN105954329A CN105954329A CN201610396811.7A CN201610396811A CN105954329A CN 105954329 A CN105954329 A CN 105954329A CN 201610396811 A CN201610396811 A CN 201610396811A CN 105954329 A CN105954329 A CN 105954329A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
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Abstract
The invention discloses a granular food humidity detection system based on a buffering protection circuit. The system comprises a humidity detection circuit. A signal processing circuit, an indication feedback circuit and a power input circuit which are sequentially connected in series are connected to the humidity detection circuit. The buffering protection circuit is connected to the power input circuit. According to the granular food humidity detection system based on the buffering protection circuit, a small quantity of granular food can be better detected, detection sensitivity is greatly improved, the detection speed is increased, and the application range of products is better widened.
Description
Technical field
The invention belongs to Humidity Detection instrument field, specifically refer to particle food based on buffer protection circuit
Dust humidity detection system.
Background technology
Certain condition deposited by the food such as beans, frumentum, especially can not leave the ring that humidity is too high in
In border, if the humidity of food is too high is easy to breed bacteria even moldy metamorphism.And current humidity measurement instrument
Device is complex to the Humidity Detection mode of food, needs to carry out its entirety by after substantial amounts of food build-up
Detection, and when food is less be difficult to pile up time, existing product be difficult to its humidity is quickly detected.
The sensitivity having the product that partly can detect a small amount of food humidity is the slowest with response speed, thus result in
Detection efficiency low.
Summary of the invention
It is an object of the invention to overcome the problems referred to above, it is provided that particle food based on buffer protection circuit is wet
Degree detecting system, it is possible to preferably a small amount of particle food is detected, substantially increase the spirit of detection
Sensitivity and speed, preferably improve the scope of application of product.
The purpose of the present invention is achieved through the following technical solutions:
Particle food dust humidity detection system based on buffer protection circuit, including chip U1, is serially connected in chip
Resistance R1 between RESET pin and the DISCH pin of U1, is serially connected in the DISCH pipe of chip U1
Resistance R2 between foot and TRIG pin, positive pole is connected with the TRIG pin of chip U1, negative pole and core
The electric capacity C1 that the GND pin of sheet U1 is connected, and positive pole is connected with the CONT pin of chip U1
Electric capacity C2 composition humidity measuring circuit；Wherein, the model of chip U1 is NE555, chip U1's
RESET pin is connected with VCC pin, and the THRES pin of chip U1 is connected with TRIG pin,
Two flat boards of electric capacity C1 are as the test side of this humidity measuring circuit；Humidity measuring circuit is also associated with
Signal processing circuit, indication feedback circuit and the power supply input circuit being sequentially connected in series, on power supply input circuit
It is also associated with buffer protection circuit.
As preferably, described signal processing circuit is connected with the OUT pin of chip U1 by positive pole, negative pole
Electric capacity C3, the N pole that negative pole with electric capacity C2 is connected after resistance R3 after electric capacity C4 with electric capacity C3
The diode D1 that positive pole is connected, P pole is connected with the negative pole of electric capacity C3, and P pole and diode
The diode D2 that the N pole of D1 is connected, N pole is connected with the P pole of diode D1 after electric capacity C5
Composition；Wherein, the negative pole of electric capacity C4 is connected with the N pole of diode D1, the N pole of diode D2 with
The positive pole of electric capacity C5 is connected.
As preferably, described indication feedback circuit is by reading table B, audion VT1, one end and audion VT1
The resistance R5 that emitter stage is connected, the other end is connected with the negative pole of electric capacity C2, one end and audion VT1
Base stage be connected, other end VCC pin with chip U1 after resistance R4 is connected, sliding end with
The slide rheostat RP1 that the negative pole of reading table B is connected, positive pole is connected with the VCC pin of chip U1,
The electric capacity C6 that negative pole is connected with the negative pole of electric capacity C2, and one end is connected with the colelctor electrode of audion VT1
Connect, resistance R6 that the other end is connected with the negative pole of electric capacity C6 composition；Wherein, reading table B is voltmeter,
The positive pole of reading table B is connected with the N pole of diode D2.
As preferably, described power supply input circuit by power supply GB, and N pole after resistance R8 with power supply
The diode D3 composition that the positive pole of GB is connected, P pole negative pole with electric capacity C6 after resistance R7 is connected；
Wherein, the N pole of diode D3 is connected with the VCC pin of chip U1, the negative pole of power supply GB and electricity
The negative pole holding C6 is connected.
Further, described buffer protection circuit by audion VT2, audion VT3, audion VT4,
Audion VT5, one end is connected with the colelctor electrode of audion VT2, the other end after resistance R11 with three poles
The resistance R9 that the base stage of pipe VT3 is connected, one end is connected with the colelctor electrode of audion VT2, the other end
The resistance R10 being connected with the colelctor electrode of audion VT3, one end is connected with the base stage of audion VT3,
Resistance R13, the N pole that the other end is connected with the colelctor electrode of audion VT5 and the colelctor electrode of audion VT4
Be connected, diode D4 that P pole base stage with audion VT4 after resistance R12 is connected, positive pole and three
The electric capacity C7 that the emitter stage of pole pipe VT2 is connected, negative pole is connected with the colelctor electrode of audion VT5, one
The resistance that end is connected with the emitter stage of audion VT2, the other end is connected with the emitter stage of audion VT4
R14, the electric capacity C8 that positive pole is connected with the positive pole of electric capacity C7, negative pole is connected with the negative pole of electric capacity C7,
One end is connected with the emitter stage of audion VT4, the other end is connected with the P pole of diode D4, slides
The transmitting of the slide rheostat RP2 that end is connected with the emitter stage of audion VT5, positive pole and audion VT5
The electric capacity C9 that pole is connected, negative pole is connected with the P pole of diode D4, and one end and electric capacity C9's is negative
Pole is connected, other end positive pole with electric capacity C8 after resistance R15 is connected, sliding end and audion VT5
Base stage be connected slide rheostat RP3 composition；Wherein, the base stage of audion VT3 and audion VT4
Colelctor electrode be connected, the base stage of audion VT2 is connected with the emitter stage of audion VT3, resistance R9
With the junction point of resistance R11 as the input of this buffer protection circuit, the negative pole of electric capacity C8 is as this buffering
The junction point of the outfan of protection circuit, resistance R9 and resistance R11 is connected with the N pole of diode D3,
The negative pole of electric capacity C8 is connected with the negative pole of power supply GB.
The present invention compared with prior art, has the following advantages and beneficial effect:
The particle food dust humidity detection system based on buffer protection circuit of the present invention can be quickly to individually
The humidity of particle food detect, substantially increase motility and the Detection results of detection, overcome
The defect that substantial amounts of graininess can only be detected by prior art, has higher detection efficiency, phase simultaneously
Improve 30-50% than the detection efficiency of existing detection means, can also preferably protect the fortune of power supply simultaneously
OK so that system can extend the use time 1-1.5 of system.
Accompanying drawing explanation
Fig. 1 is the circuit structure of the particle food dust humidity detection system based on buffer protection circuit of the present invention
Figure.
Fig. 2 is the circuit structure diagram of the buffer protection circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
Embodiment
As it is shown in figure 1, particle food dust humidity detection system based on buffer protection circuit, including chip U1,
The resistance R1 being serially connected between the RESET pin of chip U1 and DISCH pin, is serially connected in chip U1
DISCH pin and TRIG pin between resistance R2, positive pole is connected with the TRIG pin of chip U1
Connect, electric capacity C1 that negative pole is connected with the GND pin of chip U1, and the CONT of positive pole and chip U1
The humidity measuring circuit of the electric capacity C2 composition that pin is connected；Wherein, the model of chip U1 is NE555,
The RESET pin of chip U1 is connected with VCC pin, the THRES pin of chip U1 and TRIG
Pin is connected, and two flat boards of electric capacity C1 are as the test side of this humidity measuring circuit；At Humidity Detection electricity
Signal processing circuit, indication feedback circuit and the power supply input circuit being sequentially connected in series it is also associated with, at electricity on road
Buffer protection circuit it is also associated with on the input circuit of source.
Signal processing circuit by electric capacity C3, electric capacity C4, electric capacity C5, diode D1, diode D2, with
And resistance R3 composition.
During connection, the positive pole of electric capacity C3 is connected with the OUT pin of chip U1, negative pole is after resistance R3
Be connected with the negative pole of electric capacity C2, the N pole of diode D1 after electric capacity C4 with the positive pole phase of electric capacity C3
Connect, P pole is connected with the negative pole of electric capacity C3, the N pole phase of the P pole of diode D2 and diode D1
Connect, P pole with diode D1 after electric capacity C5, N pole is connected.
Wherein, the negative pole of electric capacity C4 is connected with the N pole of diode D1, the N pole of diode D2 and electricity
The positive pole holding C5 is connected.
Indication feedback circuit is by reading table B, audion VT1, slide rheostat RP1, resistance R4, resistance
R5, resistance R6, and electric capacity C6 form.
During connection, one end of resistance R5 is connected with the emitter stage of audion VT1, the other end and electric capacity C2
Negative pole be connected, one end of slide rheostat RP1 is connected with the base stage of audion VT1, other end warp
After resistance R4, the VCC pin with chip U1 is connected, sliding end is connected with the negative pole of reading table B,
The positive pole of electric capacity C6 is connected with the VCC pin of chip U1, negative pole is connected with the negative pole of electric capacity C2,
One end of resistance R6 is connected with the colelctor electrode of audion VT1, the other end is connected with the negative pole of electric capacity C6.
Wherein, reading table B is voltmeter, and the positive pole of reading table B is connected with the N pole of diode D2.
Power supply input circuit is made up of power supply GB, resistance R7, resistance R8, and diode D3.
During connection, N pole positive pole with power supply GB after resistance R8 is connected, P pole after resistance R7 with
The diode D3 that the negative pole of electric capacity C6 is connected.
Wherein, the N pole of diode D3 is connected with the VCC pin of chip U1, the negative pole of power supply GB
It is connected with the negative pole of electric capacity C6.
As in figure 2 it is shown, buffer protection circuit is by audion VT2, audion VT3, audion VT4, three
Pole pipe VT5, electric capacity C7, electric capacity C8, electric capacity C, slide rheostat RP2, slide rheostat RP3, two
Pole pipe D4, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, with
And resistance R15 composition.
During connection, one end of resistance R9 is connected with the colelctor electrode of audion VT2, the other end is through resistance R11
Base stage with audion VT3 is connected afterwards, one end of resistance R10 is connected with the colelctor electrode of audion VT2,
The other end is connected with the colelctor electrode of audion VT3, the base stage phase of one end of resistance R13 and audion VT3
Connect, the other end is connected with the colelctor electrode of audion VT5, the N pole of diode D4 and audion VT4
Colelctor electrode be connected, P pole base stage with audion VT4 after resistance R12 is connected, electric capacity C7's
Positive pole is connected with the emitter stage of audion VT2, negative pole is connected with the colelctor electrode of audion VT5, resistance
One end of R14 is connected with the emitter stage of audion VT2, the other end is connected with the emitter stage of audion VT4
Connecing, the positive pole of electric capacity C8 is connected with the positive pole of electric capacity C7, negative pole is connected with the negative pole of electric capacity C7,
One end of slide rheostat RP2 is connected with the emitter stage of audion VT4, the other end and diode D4
P pole is connected, sliding end is connected with the emitter stage of audion VT5, the positive pole of electric capacity C9 and audion
The emitter stage of VT5 is connected, negative pole is connected with the P pole of diode D4, the one of slide rheostat RP3
End is connected with the negative pole of electric capacity C9, other end positive pole with electric capacity C8 after resistance R15 is connected, cunning
Moved end is connected with the base stage of audion VT5.
Wherein, the base stage of audion VT3 is connected with the colelctor electrode of audion VT4, audion VT2's
Base stage is connected with the emitter stage of audion VT3, and the junction point of resistance R9 and resistance R11 is as this buffering
The input of protection circuit, the negative pole of electric capacity C8 as the outfan of this buffer protection circuit, resistance R9 and
The junction point of resistance R11 is connected with the N pole of diode D3, and the negative pole of electric capacity C8 is negative with power supply GB's
Pole is connected.
During use, being placed on by granular food between two flat boards of electric capacity C1, electric capacity C1 can basis
The different moisture content of particle food changes capacitance, and judges electricity eventually through the reading in reading table B
Hold the change of capacitance in C1, and obtained the humidity of particle food by change.
So just quickly the humidity of single particle food can be detected, substantially increase detection
Motility and Detection results, overcome the defect that substantial amounts of graininess can only be detected by prior art,
Having higher detection efficiency, the detection efficiency comparing existing detection means improves 30-50% simultaneously, with
Time can also preferably protect the operation of power supply so that system can extend the use time 1-1.5 of system.
As it has been described above, just can well realize the present invention.
Claims (6)
1. particle food dust humidity detection system based on buffer protection circuit, it is characterised in that: include chip
U1, the resistance R1 being serially connected between the RESET pin of chip U1 and DISCH pin, be serially connected in chip
Resistance R2 between DISCH pin and the TRIG pin of U1, the TRIG pin phase of positive pole and chip U1
The electric capacity C1 that connection, negative pole are connected with the GND pin of chip U1, and positive pole is with chip U1's
The humidity measuring circuit of the electric capacity C2 composition that CONT pin is connected；Wherein, the model of chip U1 is
The RESET pin of NE555, chip U1 is connected with VCC pin, the THRES pin of chip U1
Being connected with TRIG pin, two flat boards of electric capacity C1 are as the test side of this humidity measuring circuit；Wet
Signal processing circuit, indication feedback circuit and the power supply input electricity being sequentially connected in series it is also associated with on degree testing circuit
Road, is also associated with buffer protection circuit on power supply input circuit.
Particle food dust humidity detection system based on buffer protection circuit the most according to claim 1,
It is characterized in that: described buffer protection circuit is by audion VT2, audion VT3, audion VT4, three
Pole pipe VT5, one end is connected with the colelctor electrode of audion VT2, the other end after resistance R11 with audion
The resistance R9 that the base stage of VT3 is connected, one end is connected with the colelctor electrode of audion VT2, the other end and three
The resistance R10 that the colelctor electrode of pole pipe VT3 is connected, one end is connected with the base stage of audion VT3, another
Resistance R13, the N pole that end is connected with the colelctor electrode of audion VT5 is connected with the colelctor electrode of audion VT4
Connect, diode D4 that P pole base stage with audion VT4 after resistance R12 is connected, positive pole and audion
The electric capacity C7 that the emitter stage of VT2 is connected, negative pole is connected with the colelctor electrode of audion VT5, one end and three
The resistance R14 that the emitter stage of pole pipe VT2 is connected, the other end is connected with the emitter stage of audion VT4,
The electric capacity C8 that positive pole is connected with the positive pole of electric capacity C7, negative pole is connected with the negative pole of electric capacity C7, one end with
The emitter stage of audion VT4 is connected, the other end is connected with the P pole of diode D4, sliding end and three
The slide rheostat RP2 that the emitter stage of pole pipe VT5 is connected, positive pole is connected with the emitter stage of audion VT5
Connect, electric capacity C9 that negative pole is connected with the P pole of diode D4, and one end is connected with the negative pole of electric capacity C9
Connect, other end positive pole with electric capacity C8 after resistance R15 is connected, the base of sliding end and audion VT5
The slide rheostat RP3 composition that pole is connected；Wherein, the base stage of audion VT3 and the collection of audion VT4
Electrode is connected, and the base stage of audion VT2 is connected with the emitter stage of audion VT3, resistance R9 and electricity
The junction point of resistance R11 is as the input of this buffer protection circuit, and the negative pole of electric capacity C8 is as this buffer protection
The outfan of circuit.
Particle food dust humidity detection system based on buffer protection circuit the most according to claim 2,
It is characterized in that: described signal processing circuit is connected with the OUT pin of chip U1 by positive pole, negative pole warp
Electric capacity C3, the N pole that after resistance R3, negative pole with electric capacity C2 is connected after electric capacity C4 with electric capacity C3's
The diode D1 that positive pole is connected, P pole is connected with the negative pole of electric capacity C3, and P pole and diode D1
The diode D2 that N pole is connected, N pole is connected with the P pole of diode D1 after electric capacity C5 composition；
Wherein, the negative pole of electric capacity C4 is connected with the N pole of diode D1, the N pole of diode D2 and electric capacity
The positive pole of C5 is connected.
Particle food dust humidity detection system based on buffer protection circuit the most according to claim 3,
It is characterized in that: described indication feedback circuit is by reading table B, audion VT1, one end and audion VT1
The resistance R5 that emitter stage is connected, the other end is connected with the negative pole of electric capacity C2, one end and audion VT1
Base stage be connected, other end VCC pin with chip U1 after resistance R4 is connected, sliding end with
The slide rheostat RP1 that the negative pole of reading table B is connected, positive pole is connected with the VCC pin of chip U1,
The electric capacity C6 that negative pole is connected with the negative pole of electric capacity C2, and one end is connected with the colelctor electrode of audion VT1
Connect, resistance R6 that the other end is connected with the negative pole of electric capacity C6 composition；Wherein, reading table B is voltmeter,
The positive pole of reading table B is connected with the N pole of diode D2.
Particle food dust humidity detection system based on buffer protection circuit the most according to claim 4,
It is characterized in that: described power supply input circuit by power supply GB, and N pole after resistance R8 with power supply GB
The diode D3 composition that positive pole is connected, P pole negative pole with electric capacity C6 after resistance R7 is connected；Its
In, the N pole of diode D3 is connected with the VCC pin of chip U1, the negative pole of power supply GB and electric capacity
The negative pole of C6 is connected.
Particle food dust humidity detection system based on buffer protection circuit the most according to claim 5,
It is characterized in that: the junction point of described resistance R9 and resistance R11 is connected with the N pole of diode D3, electricity
The negative pole holding C8 is connected with the negative pole of power supply GB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396811.7A CN105954329A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detection system based on buffering protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396811.7A CN105954329A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detection system based on buffering protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105954329A true CN105954329A (en) | 2016-09-21 |
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ID=56907957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610396811.7A Pending CN105954329A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detection system based on buffering protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105954329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680320A (en) * | 2017-01-05 | 2017-05-17 | 成都芯禾粮油食品有限公司 | Humidity detection system for detecting humidity of grain for oil manufacture |
| CN106770475A (en) * | 2017-01-05 | 2017-05-31 | 成都芯禾粮油食品有限公司 | A kind of edible oil raw material humidity detection means |
-
2016
- 2016-06-03 CN CN201610396811.7A patent/CN105954329A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680320A (en) * | 2017-01-05 | 2017-05-17 | 成都芯禾粮油食品有限公司 | Humidity detection system for detecting humidity of grain for oil manufacture |
| CN106770475A (en) * | 2017-01-05 | 2017-05-31 | 成都芯禾粮油食品有限公司 | A kind of edible oil raw material humidity detection means |
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Application publication date: 20160921 |
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| WD01 | Invention patent application deemed withdrawn after publication |