CN103868954A - Grain humidity detection circuit - Google Patents

Grain humidity detection circuit Download PDF

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Publication number
CN103868954A
CN103868954A CN201410113465.8A CN201410113465A CN103868954A CN 103868954 A CN103868954 A CN 103868954A CN 201410113465 A CN201410113465 A CN 201410113465A CN 103868954 A CN103868954 A CN 103868954A
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CN
China
Prior art keywords
port
capacitor
chip
diode
resistance
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Application number
CN201410113465.8A
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Chinese (zh)
Inventor
刘杰
陈鹏
宋德林
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成都国科海博信息技术股份有限公司
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Priority to CN201410113465.8A priority Critical patent/CN103868954A/en
Publication of CN103868954A publication Critical patent/CN103868954A/en

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Abstract

The invention discloses a grain humidity detection circuit which comprises an NE 555 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 (DC) 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 NE 555 chip; the resistor R2 is connected between the port 7 and a port 8 of the NE 555 chip; the adjustable capacitor C6 is connected between a port 1 and the port 2 of the NE 555 chip; a port 4 and the port 8 of the NE 555 chip are connected with each other; the port 1 and the port 2 of the NE 555 chip are connected with each other; the capacitor C3, the diode D2, the capacitor C4 and the capacitor C1 are sequentially connected between a port 3 and a port 5 of the NE 555 chip in series. By adopting the principle, the grain humidity detection circuit is convenient to use and accurate in measurement result, thus being very suitable for rapidly measuring the grain humidity.

Description

Grain moisture testing circuit
Technical field
The present invention relates to grain moisture detection field, be specifically related to grain moisture testing circuit.
Background technology
Food problem relates to the development of national economy and stablizing of society, so guarantee the important work of quality Shi ー item of grain.The factor that grain affects quality in storage, transportation, purchase and sale is a lot, and the general temperature take 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, transportation 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 transportation, actually rare for circuit, the especially circuit of fast detecting grain moisture circuit simple, easy to use in selling.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, and grain moisture testing circuit is provided, 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 present invention is by the following technical solutions: grain moisture testing circuit, 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 invention has the beneficial effects as follows:
1, the present invention 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 present invention 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.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited to this.
Embodiment:
As shown in 1 figure, the present invention includes 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 invention.

Claims (5)

1. grain moisture testing circuit, 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. grain moisture testing circuit 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. grain moisture testing circuit according to claim 1, is characterized in that: the negative pole of described diode D1 connects the positive pole of diode D2.
4. grain moisture testing circuit 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. grain moisture testing circuit according to claim 1, is characterized in that: the measurement range of described DC voltage gauge outfit is between 0-3V.
CN201410113465.8A 2014-03-25 2014-03-25 Grain humidity detection circuit CN103868954A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201410113465.8A CN103868954A (en) 2014-03-25 2014-03-25 Grain humidity detection circuit

Publications (1)

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CN103868954A true CN103868954A (en) 2014-06-18

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977331A (en) * 2015-06-28 2015-10-14 黄宇嵩 Cereal moisture detector
CN106525907A (en) * 2016-11-04 2017-03-22 无锡艾科瑞思产品设计与研究有限公司 Detection device used for grain moisture content
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
CN107167569A (en) * 2017-05-31 2017-09-15 合肥艾瑞德电气有限公司 A kind of portable moisture analyzer
CN107192798A (en) * 2017-05-31 2017-09-22 合肥艾瑞德电气有限公司 A kind of moisture analyser for possessing various dimensions acquisition function
CN107192746A (en) * 2017-05-31 2017-09-22 合肥艾瑞德电气有限公司 A kind of condenser type moisture analyser for possessing prompting function
CN107219273A (en) * 2017-05-31 2017-09-29 合肥艾瑞德电气有限公司 A kind of moisture analyser machine moisture monitoring method
CN107219141A (en) * 2017-05-31 2017-09-29 合肥艾瑞德电气有限公司 A kind of moisture sample circuit and the condenser type moisture analyser for possessing the circuit
CN107238635A (en) * 2017-05-31 2017-10-10 合肥艾瑞德电气有限公司 A kind of open-close type electric capacity moisture analyser
CN107238636A (en) * 2017-05-31 2017-10-10 合肥艾瑞德电气有限公司 A kind of condenser type moisture analyser
CN109187652A (en) * 2018-08-08 2019-01-11 浙江大学 A kind of potting soil humidometer with USB port
CN109239133A (en) * 2018-08-08 2019-01-18 浙江大学 A kind of potting soil humidometer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2111528U (en) * 1992-01-29 1992-07-29 戴立权 On-line inteligence measuring instrument for grain moisture content
CN1873402A (en) * 2006-06-09 2006-12-06 沈阳化工学院 Humidity transmitter in low cost
CN201035743Y (en) * 2007-04-03 2008-03-12 范良凯 Humiture transducer
CN101509884A (en) * 2009-03-02 2009-08-19 北京联合大学 Grain moisture detector
CN202049127U (en) * 2011-01-13 2011-11-23 黄世辉 Oil quality monitoring device
CN203203954U (en) * 2013-03-23 2013-09-18 南通濠美服饰有限公司 Simple soil dryness and humidity detection circuit
CN203870054U (en) * 2014-03-25 2014-10-08 成都国科海博信息技术股份有限公司 Circuit for detecting grain humidity

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2111528U (en) * 1992-01-29 1992-07-29 戴立权 On-line inteligence measuring instrument for grain moisture content
CN1873402A (en) * 2006-06-09 2006-12-06 沈阳化工学院 Humidity transmitter in low cost
CN201035743Y (en) * 2007-04-03 2008-03-12 范良凯 Humiture transducer
CN101509884A (en) * 2009-03-02 2009-08-19 北京联合大学 Grain moisture detector
CN202049127U (en) * 2011-01-13 2011-11-23 黄世辉 Oil quality monitoring device
CN203203954U (en) * 2013-03-23 2013-09-18 南通濠美服饰有限公司 Simple soil dryness and humidity detection circuit
CN203870054U (en) * 2014-03-25 2014-10-08 成都国科海博信息技术股份有限公司 Circuit for detecting grain humidity

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余俊芳: "简易粮食湿度检测仪的制作", 《电子报》 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977331A (en) * 2015-06-28 2015-10-14 黄宇嵩 Cereal moisture detector
CN106525907A (en) * 2016-11-04 2017-03-22 无锡艾科瑞思产品设计与研究有限公司 Detection device used for grain moisture content
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
CN107192746A (en) * 2017-05-31 2017-09-22 合肥艾瑞德电气有限公司 A kind of condenser type moisture analyser for possessing prompting function
CN107192798A (en) * 2017-05-31 2017-09-22 合肥艾瑞德电气有限公司 A kind of moisture analyser for possessing various dimensions acquisition function
CN107167569A (en) * 2017-05-31 2017-09-15 合肥艾瑞德电气有限公司 A kind of portable moisture analyzer
CN107219273A (en) * 2017-05-31 2017-09-29 合肥艾瑞德电气有限公司 A kind of moisture analyser machine moisture monitoring method
CN107219141A (en) * 2017-05-31 2017-09-29 合肥艾瑞德电气有限公司 A kind of moisture sample circuit and the condenser type moisture analyser for possessing the circuit
CN107238635A (en) * 2017-05-31 2017-10-10 合肥艾瑞德电气有限公司 A kind of open-close type electric capacity moisture analyser
CN107238636A (en) * 2017-05-31 2017-10-10 合肥艾瑞德电气有限公司 A kind of condenser type moisture analyser
CN109187652A (en) * 2018-08-08 2019-01-11 浙江大学 A kind of potting soil humidometer with USB port
CN109239133A (en) * 2018-08-08 2019-01-18 浙江大学 A kind of potting soil humidometer

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Application publication date: 20140618

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