CN2043360U - Multifunctional grain detector - Google Patents
Multifunctional grain detector Download PDFInfo
- Publication number
- CN2043360U CN2043360U CN 88216073 CN88216073U CN2043360U CN 2043360 U CN2043360 U CN 2043360U CN 88216073 CN88216073 CN 88216073 CN 88216073 U CN88216073 U CN 88216073U CN 2043360 U CN2043360 U CN 2043360U
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- circuit
- grain
- translation
- detecting
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Abstract
The utility model discloses a multifunctional grain detector, which belongs to the grain detecting field, and the multifunctional grain detector is particularly suitable for detecting the water content of grain. The original method by detecting the change of the frequency is changed into the method by detecting the change of the electric quantity. A pointer type potential device is used for correcting the linear error, the slope rate error, the translational motion error and the temperature error. The multifunctional grain detector has the advantages of visual calibration, improved detecting accuracy and convenient operation. The degree of whiteness, the temperature of the grain, and the technical targets, such as the external environment temperature, humidity, pressure, volume weight, oxygen concentration, etc. can be detected by varying different sensors and detecting circuits. The purpose of multifunctional detection is achieved.
Description
The utility model belongs to the grain detector, particularly grain moisture content detector.
Existing grain moisture content detector generally all is that one of detecting sensor access is called in the high-frequency oscillating circuits of measuring oscillator, and the frequency f of this oscillator sine wave output is defeated relevant with sample moisture content value; Other has a standard high frequency oscillator, and its medium frequency is identical with measuring oscillator; The output f mark of standard oscillator is sent in the frequency mixer simultaneously with the output f survey of measuring oscillator, surveyed thereby can draw a difference frequency signal F=f mark-f; Then this difference frequency signal is amplified and be shaped to the rectangular wave pulse that frequency is F, carry out shaping, counting by gate circuit at last, can on the count decoding display, obtain the water cut of grain.As " digital grain quick moisture apparatus " and " the digital watery food tester " of Qingpu, Shanghai City county grain Electronic Instruments Plant production that radio three factories in Chengdu make, all be to adopt this class formation.For the grain aquametry apparatus, because influence factor is a lot, the calibration of sample and correction error are unusual important step, also are very difficult steps.Though above-mentioned moisture determination instrument is also calibration and correction error, exist calibration not directly perceived, the operation correction error will be passed through the adjustment criteria oscillator, thereby makes shortcomings such as error correction is undesirable.And above-mentioned moisture determination instrument is to obtain water cut by two frequency oscillator mixing, detects so can only carry out grain moisture content, can not carry out the measurement of the multiple index of grain.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, design that a kind of adjustment is easy to operate, calibration is directly perceived, degree of accuracy is high, thus and the multifunctional grain detector of technical indicators such as the temperature by the processing of electric weight being shown water cut, whiteness, temperature, unit weight and the external environment condition of grain, pressure, oxygen concentration.
Solution of the present utility model is: a kind of grain detector, form by sensor, metering circuit, adjustment circuit, display circuit and power circuit, and be characterized in:
A. metering circuit adopts pulse reflect wide device, bridge converter or frequency discrimination converter;
B. the adjustment circuit is made of linearity circuit, slope correcting circuit, translation correcting circuit and temperature correction circuit, wherein:
Error correction element in linearity circuit, slope correcting circuit, translation correcting circuit and the temperature correction circuit all adopts pointer potentiometer;
A commutation diode in parallel links to each other with metering circuit on the linearity circuit;
Temperature correction circuit is a direct current electric bridge, and the pointer potentiometer of temperature error correcting circuit is the output load of electric bridge;
Slope correcting circuit, translation correcting circuit and temperature correction circuit are connected by the mathematical approach.
WTM adopts the pointer potentiometer of scalable signal output full scale value in the direct current bridge output load.
Pointer potentiometer in the translation circuit can with a brachium pontis R in the direct current bridge
7Series connection.
The course of work of the present utility model is: when measuring the different technical indicator of grain, select different sensors and metering circuit for use.Measured object is through sensor, obtain the signal of resistance, electric capacity or other form, measured circuit conversion becomes corresponding direct current measurement, then through the adjustment circuit, pace of change (being slope), dispersion (being translation) and temperature error to input signal are proofreaied and correct respectively, comprehensively obtain and measured corresponding comprehensive direct current measurement through the mathematical approach, handle, on display, obtain water cut or other technical indicator value by A/D converter.
During the sample calibration, because slope correcting circuit, translation correcting circuit and temperature correction circuit have all adopted pointer potentiometer, so only use different measured object samples are respectively carried out one-shot measurement earlier,, promptly obtain the sample scaled values by writing down each pointer potentiometer scale display disc changing value.When measuring measured object, its corresponding sample scaled values is directly passed through each corresponding pointer potentiometer index dial adjusted, restore the size of scaled values, promptly realized slope correction, translation correction and temperature correction.Because slope correcting circuit, translation correcting circuit and temperature correction circuit are connected by the mathematical approach, it is independent of each other each other, correction value data and bearing calibration are all directly carried out on pointer potentiometer index dial and are reacted, so trimming process and video data are irrelevant, irrelevant with self drifting about of instrument, thereby the raising correction accuracy, the stability of raising instrument.
Linearity circuit only needs the thing amount of linearity correction to some, when measuring as water cut, whiteness, humidity etc., signal to sensing circuit carries out linearity correction, utilizes the pointer potentiometer of linearity circuit to be undertaken and can carry out adjustment to linear error by above-mentioned adjusting process.
But the input end adapted multiple sensors and the different metering circuits of this grain detector realize multifunctional testing, as:
The hygrometric degree:
A. adapted hygristor formula sensor, metering circuit is with pulse reflect wide device or bridge converter;
B. adapted humicap formula sensor, metering circuit is with pulse reflect wide device or bridge converter; Survey moisture content:
A. the adapted resistance-type is surveyed water sensor, and metering circuit is with pulse reflect wide device or frequency discrimination converter;
B. the adapted condenser type is surveyed water sensor, and metering circuit is with pulse reflect wide device or frequency discrimination converter; Oxygen determination concentration:
A. adapted oxygen determination sensor, the metering circuit bridge converter;
B. adapted gas sensor, the metering circuit bridge converter.
Measuring pressure, unit weight, weight:
The adapted pressure transducer, the metering circuit bridge converter.
Embodiment of the present utility model can further specify in conjunction with the accompanying drawings.
Fig. 1 is the utility model functional-block diagram.
Fig. 2 is the utility model embodiment circuit diagram.
As shown in Figure 2, multifunctional grain detector, particularly grain moisture content detector are made up of sensor (1), metering circuit (2), adjustment circuit (3), display circuit (4), power circuit (5).
Metering circuit adopts the pulse wide device that reflects, by resistance R
1, R
2, R
3, R
4, R
5, R
6, triode BG
1, BG
2And capacitor C
1, C
2, C
3, C
4Constitute;
Power circuit includes integrated regulator (7905), capacitor C by the power supply of metering circuit
5, C
6, K switch
1-2Include voltage stabilizing diode D with the power supply of signal circuit
1, capacitor C
7, K switch
1-1Constitute.
The adjustment circuit is made of linearity circuit, slope correcting circuit, translation correcting circuit, temperature correction circuit, wherein:
Linearity circuit is by pointer potentiometer Wc and parallel connection rectification diode D thereon
2Constitute, link to each other with the reflect output of wide device of pulse;
Slope correcting circuit comprises a pointer potentiometer WB;
Temperature correction circuit is a direct current electric bridge, and four brachium pontis are respectively: resistance R
8Be an arm, resistance R
7Be an arm, resistance R
10With potentiometer WTo be an arm, commutation diode DT and temperature sensor are an arm, its output load is for regulating pointer potentiometer WTM, the resistance R of full scale value
9With the pointer potentiometer WT that plays the temperature correction effect;
The pointer potentiometer WA of translation correcting circuit high-ranking officers positive translation error is connected in series to R
7Last formation;
Slope correcting circuit, temperature correction circuit peace shift correction circuit are connected by the mathematical approach.
Display circuit is by switch K
2-1, K
2-2, A/D converter and digital display board constitute.
After measured object put into moisture sensor, convert the measured object amount to corresponding direct current measurement, power supply E by the pulse wide device that reflects
2The working power of reflecting wide device as pulse; Pulse is reflected the electric signal of wide device output through linearity circuit, slope correcting circuit, translation correcting circuit, temperature correction circuit adjustment, and superposeing by the mathematical approach combination obtains and the corresponding direct current measurement of measured object amount; Handle through switch, A/D converter, on display board, obtain the water cut of grain.
Linearity correction, slope correction, translation correction, temperature correction are carried out on its pointer potentiometer respectively, and correction data can directly be read on the index dial of pointer potentiometer.
Temperature correction circuit is a direct current electric bridge, and its working power is to use the stabilized voltage supply E of A/D converter
1When the measured object temperature variation, temperature sensor is converted to direct current measurement with temperature variation, causes the respective change of electric bridge output electric weight, thereby obtain corresponding adjustment in pointer potentiometer WT.WTM is in order to the full scale value of conditioning signal output.If this temperature correction circuit is mixed multi-way switch, thermal sensing element is pressed matrix wiring, can realize the measurement of environment temperature.
The translation correcting circuit is used temperature correction circuit, translation corrector WA is serially connected in a brachium pontis R of temperature correction circuit
7On, obtain a direct current signal, proofread and correct the translation error amount by WA then.
The utility model is measured grain moisture content with original mixing method, change into and adopt the pulse wide device etc. that reflects, thereby utilize electric weight to show the various technical indicators of grain, in the adjustment circuit, adopt pointer potentiometer to proofread and correct to linearity, translation, slope, four kinds of errors of temperature respectively. So, the utility model correction error easily and fast, the accuracy height, calibration is directly perceived, adopts different sensors can realize the multifunctional measuring of the various technical indicators of grain.
Claims (3)
1, a kind of multifunctional grain detector is made up of sensor (1), metering circuit (2), adjustment circuit (3), display circuit (4) and power circuit (5), it is characterized in that:
A. metering circuit (2) adopts pulse reflect wide device, bridge converter or frequency discrimination converter;
B. adjustment circuit (3) is made of linearity circuit, slope correcting circuit, translation correcting circuit and temperature correction circuit, wherein:
Error correction element (W in linearity circuit, slope correcting circuit, translation correcting circuit and the temperature correction circuit
C, W
B, W
A, W
T) all adopt pointer potentiometer;
A commutation diode D in parallel on the linearity circuit
2, link to each other with metering circuit;
Temperature correction circuit is a direct current electric bridge, the pointer potentiometer W of error correction
TOutput load for electric bridge;
Slope correcting circuit, translation correcting circuit and temperature correction circuit are connected by the mathematical approach.
2, multifunctional grain detector according to claim 1 is characterized in that an output load WTM adopts the scalable signal to export the pointer potentiometer of full scale value in the direct current bridge.
3,, it is characterized in that the pointer potentiometer WA in the translation circuit connects with direct current bridge one brachium pontis R7 according to claim 1,2 described multifunctional grain detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88216073 CN2043360U (en) | 1988-11-12 | 1988-11-12 | Multifunctional grain detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88216073 CN2043360U (en) | 1988-11-12 | 1988-11-12 | Multifunctional grain detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2043360U true CN2043360U (en) | 1989-08-23 |
Family
ID=4848768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88216073 Withdrawn CN2043360U (en) | 1988-11-12 | 1988-11-12 | Multifunctional grain detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2043360U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445712C (en) * | 2005-10-24 | 2008-12-24 | 圆创科技股份有限公司 | Temperature measurement circuit with correction by translating a switching reference level |
| 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 |
| 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 |
| 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 |
| CN110568134A (en) * | 2019-09-09 | 2019-12-13 | 深圳冠亚水分仪科技有限公司 | Moisture meter sensor and working method |
-
1988
- 1988-11-12 CN CN 88216073 patent/CN2043360U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445712C (en) * | 2005-10-24 | 2008-12-24 | 圆创科技股份有限公司 | Temperature measurement circuit with correction by translating a switching reference level |
| 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 |
| 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 |
| 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 |
| CN110568134A (en) * | 2019-09-09 | 2019-12-13 | 深圳冠亚水分仪科技有限公司 | Moisture meter sensor and working method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |