CN105973950A - Granular food humidity detecting system based on humidity-detection steady-state circuit - Google Patents
Granular food humidity detecting system based on humidity-detection steady-state circuit Download PDFInfo
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- CN105973950A CN105973950A CN201610392987.5A CN201610392987A CN105973950A CN 105973950 A CN105973950 A CN 105973950A CN 201610392987 A CN201610392987 A CN 201610392987A CN 105973950 A CN105973950 A CN 105973950A
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- G—PHYSICS
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- 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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Abstract
The invention discloses a granular food humidity detecting system based on a humidity-detection steady-state circuit. The granular food humidity detecting system comprises a humidity detecting circuit; a signal processing circuit, an indication feedback circuit and a power input circuit are connected to the humidity detecting circuit, wherein the signal processing circuit, the indication feedback circuit and the power input circuit are sequentially connected in series; the humidity-detection steady-state circuit is further arranged on the humidity detecting circuit and the signal processing circuit. By means of the granular food humidity detecting system based on the humidity-detection steady-state circuit, a small amount of granular food can be better detected, detection sensitivity is greatly improved, the detection speed is greatly increased, and the application range of the product is better expanded.
Description
Technical field
The invention belongs to Humidity Detection instrument field, specifically refer to particle food based on wet inspection steady-state 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 wet inspection steady-state 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 wet inspection steady-state 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, humidity measuring circuit with
Wet inspection steady-state circuit it is additionally provided with in signal processing 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 wet inspection steady-state circuit is by audion VT2, audion VT3, audion VT4, P
Pole is connected with the base stage of audion VT2, N pole emitter stage with audion VT2 after resistance R11 is connected
The diode D4 connect, positive pole base stage with audion VT2 after resistance R12 is connected, negative pole and three poles
The electric capacity C8 that the emitter stage of pipe VT3 is connected, positive pole is connected with the colelctor electrode of audion VT2, negative pole
Emitter stage with audion VT3 is connected after resistance R17 electric capacity C7, is arranged in parallel with electric capacity C7
Resistance R10, one end is connected with the positive pole of electric capacity C7, the other end after resistance R13 with electric capacity C8 just
The resistance R9 that pole is connected, one end is connected with the colelctor electrode of audion VT3, the other end and resistance R9 and
The resistance R14 that the junction point of resistance R13 is connected, one end is connected with the base stage of audion VT3, another
The resistance R15 that end is connected with the colelctor electrode of audion VT4, one end and resistance R9 and the company of resistance R13
The resistance R16 that contact is connected, the other end is connected with the colelctor electrode of audion VT4, one end and audion
The resistance R18 that the emitter stage of VT3 is connected, the other end is connected with the emitter stage of audion VT4, and
One end is connected with the emitter stage of audion VT3, the resistance that the other end is connected with the base stage of audion VT4
R19 forms；Wherein, the N pole of diode D4 is as the input of this wet inspection steady-state circuit, audion VT4
Colelctor electrode as the outfan of this wet inspection steady-state circuit, the N pole of diode D4 and the negative pole phase of electric capacity C1
Connecting, the colelctor electrode of audion VT4 is connected with the negative pole of electric capacity C3.
The present invention compared with prior art, has the following advantages and beneficial effect:
The particle food dust humidity detection system based on wet inspection steady-state circuit of the present invention can be quickly to individually
The humidity of particle food detect, have high stability, substantially increase the motility of detection
With Detection results, overcome the defect that substantial amounts of graininess can only be detected by prior art, have simultaneously
Higher detection efficiency, the detection efficiency comparing existing detection means improves 30-50%.
Accompanying drawing explanation
Fig. 1 is the circuit structure of the particle food dust humidity detection system based on wet inspection steady-state circuit of the present invention
Figure.
Fig. 2 is the circuit structure diagram of the wet inspection steady-state 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 wet inspection steady-state 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, wet on road
Degree testing circuit is additionally provided with wet inspection steady-state circuit in signal processing circuit.
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, wet inspection steady-state circuit is by audion VT2, audion VT3, audion VT4, two
Pole pipe D4, electric capacity C7, electric capacity C8, resistance R9, resistance R10, resistance R11, resistance R12, resistance
R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, and resistance R19 group
Become.
During connection, the P pole of diode D4 is connected with the base stage of audion VT2, N pole is through resistance R11
Emitter stage with audion VT2 is connected afterwards, the positive pole of electric capacity C8 after resistance R12 with audion VT2
Base stage be connected, negative pole is connected with the emitter stage of audion VT3, the positive pole of electric capacity C7 and audion
The colelctor electrode of VT2 is connected, negative pole emitter stage with audion VT3 after resistance R17 is connected, resistance
R10 is arranged in parallel with electric capacity C7, and one end of resistance R9 is connected with the positive pole of electric capacity C7, other end warp
After resistance R13, the positive pole with electric capacity C8 is connected, one end of resistance R14 and the colelctor electrode of audion VT3
Be connected, the other end is connected with the junction point of resistance R9 and resistance R13, one end of resistance R15 and three
The base stage of pole pipe VT3 is connected, the other end is connected with the colelctor electrode of audion VT4, the one of resistance R16
End is connected with the junction point of resistance R9 and resistance R13, the other end is connected with the colelctor electrode of audion VT4
Connecing, one end of resistance R18 is connected with the emitter stage of audion VT3, the other end is sent out with audion VT4's
Emitter-base bandgap grading is connected, and one end of resistance R19 is connected with the emitter stage of audion VT3, the other end and audion
The base stage of VT4 is connected.
Wherein, the N pole of diode D4 is as the input of this wet inspection steady-state circuit, the collection of audion VT4
Electrode is connected with the negative pole of electric capacity C1 as the outfan of this wet inspection steady-state circuit, the N pole of diode D4,
The colelctor electrode of audion VT4 is connected with the negative pole of electric capacity C3.
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, have high stablizing
Property, substantially increase motility and the Detection results of detection, overcoming prior art can only be to substantial amounts of granule
Shape carries out the defect detected, and has higher detection efficiency simultaneously, compares the detection effect of existing detection means
Rate improves 30-50%.
As it has been described above, just can well realize the present invention.
Claims (6)
1. particle food dust humidity detection system based on wet inspection steady-state 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 additionally provided with wet inspection steady-state circuit on humidity measuring circuit with signal processing circuit.
Particle food dust humidity detection system based on wet inspection steady-state circuit the most according to claim 1,
It is characterized in that: described wet inspection steady-state circuit is by audion VT2, audion VT3, audion VT4, P
Pole is connected with the base stage of audion VT2, N pole emitter stage with audion VT2 after resistance R11 is connected
The diode D4 connect, positive pole base stage with audion VT2 after resistance R12 is connected, negative pole and three poles
The electric capacity C8 that the emitter stage of pipe VT3 is connected, positive pole is connected with the colelctor electrode of audion VT2, negative pole
Emitter stage with audion VT3 is connected after resistance R17 electric capacity C7, is arranged in parallel with electric capacity C7
Resistance R10, one end is connected with the positive pole of electric capacity C7, the other end after resistance R13 with electric capacity C8 just
The resistance R9 that pole is connected, one end is connected with the colelctor electrode of audion VT3, the other end and resistance R9 and
The resistance R14 that the junction point of resistance R13 is connected, one end is connected with the base stage of audion VT3, another
The resistance R15 that end is connected with the colelctor electrode of audion VT4, one end and resistance R9 and the company of resistance R13
The resistance R16 that contact is connected, the other end is connected with the colelctor electrode of audion VT4, one end and audion
The resistance R18 that the emitter stage of VT3 is connected, the other end is connected with the emitter stage of audion VT4, and
One end is connected with the emitter stage of audion VT3, the resistance that the other end is connected with the base stage of audion VT4
R19 forms；Wherein, the N pole of diode D4 is as the input of this wet inspection steady-state circuit, audion VT4
Colelctor electrode as the outfan of this wet inspection steady-state circuit.
Particle food dust humidity detection system based on wet inspection steady-state 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 wet inspection steady-state 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 wet inspection steady-state 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 wet inspection steady-state circuit the most according to claim 5,
It is characterized in that: the N pole of described diode D4 is connected with the negative pole of electric capacity C1, audion VT4's
Colelctor electrode is connected with the negative pole of electric capacity C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392987.5A CN105973950A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detecting system based on humidity-detection steady-state circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392987.5A CN105973950A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detecting system based on humidity-detection steady-state circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105973950A true CN105973950A (en) | 2016-09-28 |
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ID=57010871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610392987.5A Pending CN105973950A (en) | 2016-06-03 | 2016-06-03 | Granular food humidity detecting system based on humidity-detection steady-state circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105973950A (en) |
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2016
- 2016-06-03 CN CN201610392987.5A patent/CN105973950A/en active Pending
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Application publication date: 20160928 |
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