CN203870054U - Circuit for detecting grain humidity - Google Patents
Circuit for detecting grain humidity Download PDFInfo
- Publication number
- CN203870054U CN203870054U CN201420137433.7U CN201420137433U CN203870054U CN 203870054 U CN203870054 U CN 203870054U CN 201420137433 U CN201420137433 U CN 201420137433U CN 203870054 U CN203870054 U CN 203870054U
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Abstract
The utility model discloses a circuit for detecting grain humidity. The circuit comprises an NE555 chip, a resistor R1, a resistor R2, a slide rheostat R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a direct-current voltmeter head, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5 and an adjustable capacitor C6, wherein the resistor R1 is connected between a port 2 and a port 7 of the NE555 chip; the resistor R2 is connected between the port 7 and a port 8 of the NE555 chip; the adjustable capacitor C6 is connected between a port 1 and the port 2 of the NE555 chip; a port 4 and the port 8 of the NE555 chip are connected; the port 1 and the port 2 of the NE555 chip are connected; the capacitor C3, the diode D2, the capacitor C4 and the capacitor C1 are in series connection between a port 3 and a port 5 of the NE555 chip sequentially. According to the principle, the circuit is convenient to use, accurate in measurement result and very applicable to quick measurement of the grain humidity.
Description
Technical field
The utility model relates to grain moisture detection field, is specifically related to the circuit for detection of grain moisture.
Background technology
Food problem relates to the development of national economy and stablizing of society, so ensure the important work of quality Shi ー item of grain.The factor that grain affects quality in storage, transport, purchase and sale is a lot, and the general temperature taking grain in silo and humidity are the main Ginseng number that detects, and silo composition of gases within content is auxiliary Ginseng number.But grain is distinguished the state of grain in storage, transport and purchase and sale, the easy detection of its humidity is in demand.Particularly, for some grain purchases units, the humidity of grain is had to certain requirement, how to detect fast pay wheat, fiddle with, the humidity situation of corn, soybean even-granular grain is very important.The method, scheme, instrument, equipment, the facility that detect now cereal temperature and humidity be a lot, but be applied to family, or transport, actually rare for circuit, the especially circuit of fast detecting grain moisture circuit simple, easy to use in selling.
Utility model content
The utility model has overcome the deficiencies in the prior art, is provided for detecting the circuit of grain moisture, and this circuit is simple, easy to use and measurement result is accurate, is very suitable for Quick Measurement grain moisture.
For solving above-mentioned technical matters, the utility model is by the following technical solutions: for detection of the circuit of grain moisture, comprise NE555 chip, resistance R 1, resistance R 2, slide rheostat R3, resistance R 4, resistance R 5, diode D1, diode D2, DC voltage gauge outfit, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5 and tunable capacitor C6, contact resistance R1 between the port 2 of described NE555 chip and port 7; Contact resistance R2 between the port 7 of NE555 chip and port 8; Between the port one of NE555 chip and port 2, connect tunable capacitor C6, the port 4 of NE555 chip is connected with port 8; The port one of NE555 chip is connected with port 2; Series capacitance C3, diode D2, capacitor C 4 and capacitor C 1 successively between the port 3 of NE555 chip and port 5, at the two ends of the diode D2 being connected in series and capacitor C 4 parallel diode D1, capacitor C 2 is connected in parallel at the two ends of triode C3 and diode D1; Two of resistance in series R4 and slide rheostat R3 moved ends not successively between the port one of NE555 chip and port 8, the moved end of slide rheostat R3 connects DC voltage gauge outfit, and DC voltage gauge outfit connects the common port of capacitor C 4 and diode D2; In port 4 connections of NE555 chip, draw capacitor C 5, at the also contact resistance R5 of common port of resistance R 4 and diode D3, resistance R 5 also connects power supply VCC.
The port one of described NE555 chip also connects the common port of capacitor C 1 and capacitor C 2.
The negative pole of described diode D1 connects the positive pole of diode D2.
The size of described capacitor C 1 and the equal and opposite in direction of capacitor C 3.All play the effect of filtering.
The measurement range of described DC voltage gauge outfit is between 0-3V.Can meet the measurement of grain moisture.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model is by under the acting in conjunction of tunable capacitor, NE555 chip and resistance capacitance, there is specific funtcional relationship according to the output of DC voltage and relative air humidity, can detect the relative humidity of grain air of living in by measuring the size of output voltage, then the voltage that reads DC voltage gauge outfit can be learnt the humidity situation of grain, easy to use and circuit is simple.
2, the utility model is also provided with capacitor C 5 on the port 4 of NE555 chip, so that the undesired signal in filtering output signal makes test result more accurate.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated, embodiment of the present utility model is not limited to this.
Embodiment:
As shown in 1 figure, the utility model comprises NE555 chip, resistance R 1, resistance R 2, slide rheostat R3, resistance R 4, resistance R 5, diode D1, diode D2, DC voltage gauge outfit, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5 and tunable capacitor C6, the equal and opposite in direction of the size of capacitor C 1 and capacitor C 3, the measurement range of DC voltage gauge outfit is between 0-3V.100 kilo-ohms of resistance R 1 values wherein, the value of resistance R 2 is 1/2 of resistance R 1, and the maximum value of slide rheostat R3 is 10 kilo-ohms, and the value of resistance R 4 is 10 kilo-ohms, and R5 value is 1 kilo-ohm.Capacitor C 1 and capacitor C 3 value 0.01 microfarads, capacitor C 4 and C5 value 4700Pf, capacitor C 2 value 5600Pf, the model of diode D1 and D2 is IN4001, tunable capacitor C6 is that general tunable capacitor can be realized.And input voltage VCC value 9V.
Contact resistance R1 between the port 2 of the NE555 chip of the present embodiment and port 7; Contact resistance R2 between the port 7 of NE555 chip and port 8; Between the port one of NE555 chip and port 2, connect tunable capacitor C6, the port 4 of NE555 chip is connected with port 8; The port one of NE555 chip is connected with port 2; Series capacitance C3, diode D2, capacitor C 4 and capacitor C 1 successively between the port 3 of NE555 chip and port 5, at the two ends of the diode D2 being connected in series and capacitor C 4 parallel diode D1, capacitor C 2 is connected in parallel at the two ends of triode C3 and diode D1.In addition, two of resistance in series R4 and slide rheostat R3 moved ends not successively between the port one of NE555 chip and port 8, the moved end of slide rheostat R3 connects DC voltage gauge outfit, and DC voltage gauge outfit connects the common port of capacitor C 4 and diode D2; In port 4 connections of NE555 chip, draw capacitor C 5, at the also contact resistance R5 of common port of resistance R 4 and diode D3, resistance R 5 also connects power supply VCC.The port one of NE555 chip also connects the common port of capacitor C 1 and capacitor C 2, and the negative pole of diode D1 connects the positive pole of diode D2.
This circuit is put into grain to be detected, there is specific funtcional relationship according to the output of DC voltage and relative air humidity, can detect the relative humidity of grain air of living in by measuring the size of output voltage.Just form a pulse oscillator by NE555 chip and R1, R2 and tunable capacitor C6.At the output terminal of oscillatory circuit, form a pulse detection circuit by C2, C3 and D1, D2, it is DC voltage by the impulse transfer of oscillatory circuit output, and this voltage is shown by a DC voltage gauge outfit, just can learn the humidity of grain.And capacitor C 5 wherein plays the effect of pressure limiting energy storage, capacitor C 1 and C4 are the effects of playing filtering, and this design is in order that increase the antijamming capability of circuit.Resistance R 5 is mainly the effect of playing dividing potential drop, avoids the excessive damage of voltage NE555 chip, and resistance R 4 is mainly the effect of playing shunting.This circuit structure is simple, easy to use, is very suitable for grain moisture and measures.On the port 4 of NE555 chip, be also provided with capacitor C 5, so that the undesired signal in filtering output signal, test result is accurate.
Just can realize as mentioned above this utility model.
Claims (5)
1. for detection of the circuit of grain moisture, it is characterized in that: comprise NE555 chip, resistance R 1, resistance R 2, slide rheostat R3, resistance R 4, resistance R 5, diode D1, diode D2, DC voltage gauge outfit, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5 and tunable capacitor C6, contact resistance R1 between the port 2 of described NE555 chip and port 7; Contact resistance R2 between the port 7 of NE555 chip and port 8; Between the port one of NE555 chip and port 2, connect tunable capacitor C6, the port 4 of NE555 chip is connected with port 8; The port one of NE555 chip is connected with port 2; Series capacitance C3, diode D2, capacitor C 4 and capacitor C 1 successively between the port 3 of NE555 chip and port 5, at the two ends of the diode D2 being connected in series and capacitor C 4 parallel diode D1, capacitor C 2 is connected in parallel at the two ends of triode C3 and diode D1; Two of resistance in series R4 and slide rheostat R3 moved ends not successively between the port one of NE555 chip and port 8, the moved end of slide rheostat R3 connects DC voltage gauge outfit, and DC voltage gauge outfit connects the common port of capacitor C 4 and diode D2; In port 4 connections of NE555 chip, draw capacitor C 5, at the also contact resistance R5 of common port of resistance R 4 and diode D3, resistance R 5 also connects power supply VCC.
2. the circuit for detection of grain moisture according to claim 1, is characterized in that: the port one of described NE555 chip also connects the common port of capacitor C 1 and capacitor C 2.
3. the circuit for detection of grain moisture according to claim 1, is characterized in that: the negative pole of described diode D1 connects the positive pole of diode D2.
4. the circuit for detection of grain moisture according to claim 1, is characterized in that: the size of described capacitor C 1 and the equal and opposite in direction of capacitor C 3.
5. the circuit for detection of grain moisture according to claim 1, is characterized in that: the measurement range of described DC voltage gauge outfit is between 0-3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137433.7U CN203870054U (en) | 2014-03-25 | 2014-03-25 | Circuit for detecting grain humidity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137433.7U CN203870054U (en) | 2014-03-25 | 2014-03-25 | Circuit for detecting grain humidity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203870054U true CN203870054U (en) | 2014-10-08 |
Family
ID=51650994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420137433.7U Expired - Fee Related CN203870054U (en) | 2014-03-25 | 2014-03-25 | Circuit for detecting grain humidity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203870054U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868954A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Grain humidity detection circuit |
-
2014
- 2014-03-25 CN CN201420137433.7U patent/CN203870054U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868954A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Grain humidity detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20200325 |