CN102243198A - High-precision digitized cotton moisture intelligent detector - Google Patents
High-precision digitized cotton moisture intelligent detector Download PDFInfo
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- CN102243198A CN102243198A CN 201110095934 CN201110095934A CN102243198A CN 102243198 A CN102243198 A CN 102243198A CN 201110095934 CN201110095934 CN 201110095934 CN 201110095934 A CN201110095934 A CN 201110095934A CN 102243198 A CN102243198 A CN 102243198A
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Abstract
A high-precision digitized cotton moisture intelligent detector, which fundamentally solves problems of a prior cotton moisture tester, such as complex operation, large volume, inconvenient carry and non visual display, etc. The detector comprises a measure sensor, a reference capacitance, a digital temperature sensor, a one-chip microcomputer, a host computer and a display module, and a technical main point lays in that the detector also comprises a capacitance-resistance pulse converting circuit and an RS485communication module. The detector employs technologies of the capacitance-resistance pulse converting (RC/F) and the RS485communication module to realize whole course digitization of a moisture sensor. The sensor has high working efficiency, no harm to cotton, portability, simple hardware structure, so as to substantially reduce system hardware complexity; and the sensor also has strong functions, high precision and high reliability, so as to substantially raise anti-interference capability of a detection signal.
Description
Technical field
The present invention relates to the moisture of cotton fiber detection system, particularly a kind of high-precision digital cotton moisture content intelligent detecting instrument.
Background technology
The water percentage of cotton fiber is a key parameter that influences the cotton crudy, also is an important control reference quantity in the cotton crudy supervisory system.The assay method of cotton moisture content can be divided into direct method and indirect method two big classes.Because but indirect method has fast and METHOD FOR CONTINUOUS DETERMINATION, therefore having obtained continuous development for many years, is domestic and international cotton moisture content measuring instrument main flow.The typical indirect measuring instrument of cotton moisture content has microwave type, infrared-type, the shooting of CCD(black and white) formula, condenser type and resistance-type.
The cotton moisture content analyzer that China uses at present is the resistance-type analyzer of development in 1956 basically, exists complex operation, and volume is bigger, carries inconvenience, shows defectives such as not directly perceived.Therefore develop a kind of instrument that fundamentally solves above defective, imperative.
Summary of the invention
The objective of the invention is for a kind of high-precision digital cotton moisture content intelligent detecting instrument that detects water percentage in cotton processing is provided, fundamentally solve the complex operation that existing cotton moisture content analyzer exists, volume is bigger, carries inconvenience, shows problems such as not directly perceived.
Technical scheme of the present invention is: this high-precision digital cotton moisture content intelligent detecting instrument, comprise survey sensor, reference capacitance, digital temperature sensor, single-chip microcomputer, host computer and display module, it is characterized in that: also have capacitance-resistance pulse switching circuit and RS485 communication module;
Described survey sensor is a testing capacitance, and testing capacitance is for becoming specific inductive capacity formula variable condenser;
Described testing capacitance and reference capacitance insert the capacitance-resistance pulse switching circuit respectively, then described testing capacitance and reference capacitance produce pulse signal respectively, the appearance value negative correlation of the umber of pulse of pulse signal and electric capacity, the moisture positive correlation of the difference of the umber of pulse of two row pulse trains and material to be measured;
Described digital temperature sensor and described capacitance-resistance pulse switching circuit are connected respectively to the input end of described single-chip microcomputer, then described single-chip microcomputer detects the poor of umber of pulse that described capacitance-resistance pulse switching circuit produces by counter, and the universal serial bus of the measured temperature that this number is produced together with described digital temperature sensor by the RS485 communication module sends described host computer to;
Described host computer can be accepted the data of maximum 256 the next moisture transducers by the RS485/RS232 modular converter, after logarithm value is carried out normalized, carry out gamma correction and temperature compensation again, produce the moisture measurement value of cotton, show by display module at last.
Described capacitance-resistance pulse switching circuit is to utilize a slice CMOS timer TLC555, mixes HS1100 and two resistance formation monostable circuits, converts relative humidity to frequency signal.
When the numerical value of described host computer after to normalized carries out gamma correction and temperature compensation, adopt the BP artificial neural network technology; The weight matrix of described BP artificial neural network and threshold vector can obtain by the method for off-line training and online correction; Detection system has adopted the BP artificial neural network of the topological structure that utilizes a large amount of experimental data off-line trainings to carry out software and has proofreaied and correct and compensate, the normalization numerical value of the measurement output that is input as moisture transducer of network, and the output valve of network is the moisture of cotton.
Advantage of the present invention and positive technique effect are: this instrument adopts capacitance-resistance pulses switch (RC/F), technology such as RS485 communication module, realized " the omnidistance digitizing " of moisture transducer, high efficiency, do not hinder cotton, be easy to carry, hardware configuration is simple, the complicacy that greatly reduces system hardware, powerful, precision is high, reliability is high, has improved the antijamming capability of detection signal greatly.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail:
Fig. 1 is a cotton moisture content detection system hardware principle block diagram of the present invention;
Fig. 2 is a capacitance-resistance pulse switching circuit schematic diagram.
Embodiment
According to Fig. 1 the present invention is described in detail.This detector is applicable to the detection of moisture in the cotton in the cotton processing, with the purpose of the quality monitoring that reaches cotton processing.During work, the variation with cotton moisture content when capacitive transducer is medium with the cotton causes different these characteristics of capacitance of electric capacity to carry out the non electrical quantity conversion of cotton (unginned cotton) water percentage.
The structure of high-precision digital cotton moisture content intelligent detecting instrument is formed as shown in Figure 1: mainly form by measuring sensing head (testing capacitance), reference capacitance, capacitance-resistance pulse switching circuit, single chip microcomputer, RS485 communication module, digital temperature sensor, host computer etc.Testing capacitance and reference capacitance insert the capacitance-resistance change-over circuit respectively, send into single-chip microcomputer through two pulse signals that the capacitance-resistance change-over circuit is changed out, digital temperature sensor is connected on the single-chip microcomputer, realize multi-computer communication by the RS485 bussing technique between host computer and the single-chip microcomputer, host computer shows on display module after with data processing.The capacitance-resistance pulse switching circuit is to utilize a slice CMOS timer TLC555, mixes HS1100 and two resistance R 1, R2 constitute monostable circuit, converts relative humidity to frequency signal.
The components and parts model: measure sensing head HS1100, the capacitance-resistance change-over circuit adopts 555 to be acp chip, and host computer and single-chip microcomputer adopt SPCE061A-PLCC84, digital sensor DS18B20.
The course of work of this high-precision digital cotton moisture content intelligent detecting instrument: testing capacitance and reference capacitance produce pulse signal respectively, the difference of the umber of pulse of two row pulse trains and the moisture positive correlation of material to be measured in the appearance value negative correlation of the umber of pulse of pulse signal and electric capacity, certain hour; Single-chip microcomputer is poor by the umber of pulse that counter detects within a certain period of time, and this number is issued host computer together with the measured temperature that digital temperature sensor produces by the RS485 universal serial bus.Host computer can be accepted the data of maximum 256 the next moisture transducers simultaneously by the RS485/RS232 modular converter, after logarithm value is carried out normalized, carrying out the moisture measurement value of gamma correction and temperature compensation generation cotton again, is to show on the LCDs at display module.
When the numerical value of host computer after to normalized carries out gamma correction and temperature compensation among the application, adopt the BP artificial neural network technology: the weight matrix of BP artificial neural network and threshold vector can obtain by the method for off-line training and online correction; Detection system has adopted the BP artificial neural network of the topological structure that utilizes a large amount of experimental data off-line trainings to carry out software and has proofreaied and correct and compensate, the normalization numerical value of the measurement output that is input as moisture transducer of network, and the output valve of network is the moisture of cotton.
Claims (3)
1. a high-precision digital cotton moisture content intelligent detecting instrument comprises survey sensor, reference capacitance, digital temperature sensor, single-chip microcomputer, host computer and display module, it is characterized in that: also have capacitance-resistance pulse switching circuit and RS485 communication module;
Described survey sensor is a testing capacitance, and testing capacitance is for becoming specific inductive capacity formula variable condenser;
Described testing capacitance and reference capacitance insert the capacitance-resistance pulse switching circuit respectively, then described testing capacitance and reference capacitance produce pulse signal respectively, the appearance value negative correlation of the umber of pulse of pulse signal and electric capacity, the moisture positive correlation of the difference of the umber of pulse of two row pulse trains and material to be measured;
Described digital temperature sensor and described capacitance-resistance pulse switching circuit are connected respectively to the input end of described single-chip microcomputer, then described single-chip microcomputer detects the poor of umber of pulse that described capacitance-resistance pulse switching circuit produces by counter, and the universal serial bus of the measured temperature that this number is produced together with described digital temperature sensor by the RS485 communication module sends described host computer to;
Described host computer can be accepted the data of maximum 256 the next moisture transducers by the RS485/RS232 modular converter, after logarithm value is carried out normalized, carry out gamma correction and temperature compensation again, produce the moisture measurement value of cotton, show by display module at last.
2. high-precision digital cotton moisture content intelligent detecting instrument according to claim 1, it is characterized in that: described capacitance-resistance pulse switching circuit is to utilize a slice CMOS timer TLC555, mix HS1100 and two resistance formation monostable circuits, convert relative humidity to frequency signal.
3. high-precision digital cotton moisture content intelligent detecting instrument according to claim 1 is characterized in that: when the numerical value of described host computer after to normalized carries out gamma correction and temperature compensation, adopt the BP artificial neural network technology; The weight matrix of described BP artificial neural network and threshold vector can obtain by the method for off-line training and online correction; Detection system has adopted the BP artificial neural network of the topological structure that utilizes a large amount of experimental data off-line trainings to carry out software and has proofreaied and correct and compensate, the normalization numerical value of the measurement output that is input as moisture transducer of network, and the output valve of network is the moisture of cotton.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110095934 CN102243198A (en) | 2011-04-18 | 2011-04-18 | High-precision digitized cotton moisture intelligent detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110095934 CN102243198A (en) | 2011-04-18 | 2011-04-18 | High-precision digitized cotton moisture intelligent detector |
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| CN102243198A true CN102243198A (en) | 2011-11-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044977A (en) * | 2019-05-07 | 2019-07-23 | 中山市武汉理工大学先进工程技术研究院 | A kind of sandstone aggregate detecting device for moisture content and method |
| CN110095514A (en) * | 2019-05-28 | 2019-08-06 | 南京信息工程大学 | A kind of moisture meter system convenient for data acquisition |
| CN110433904A (en) * | 2019-08-14 | 2019-11-12 | 安徽大洋自动化科技有限公司 | A kind of high precision electro resistive grain INTELLIGENT MOISTURE MEASUREMENT instrument |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201780280U (en) * | 2010-03-26 | 2011-03-30 | 陕西华斯特仪器有限责任公司 | Poking device for cotton bale moisture regain measurement |
| CN202033322U (en) * | 2011-04-18 | 2011-11-09 | 塔里木大学 | High-precision digital and intelligent cotton moisture detector |
-
2011
- 2011-04-18 CN CN 201110095934 patent/CN102243198A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201780280U (en) * | 2010-03-26 | 2011-03-30 | 陕西华斯特仪器有限责任公司 | Poking device for cotton bale moisture regain measurement |
| CN202033322U (en) * | 2011-04-18 | 2011-11-09 | 塔里木大学 | High-precision digital and intelligent cotton moisture detector |
Non-Patent Citations (2)
| Title |
|---|
| 《华中农业大学学报》 20100831 王伟等 基于BP神经网络的棉花水分检测仪设计 第533-536页 1-3 第29卷, 第4期 * |
| 《大众科技》 20101231 徐遵 湿度传感器应用电路的分析与探讨 第158-159页 2 , 第10期 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044977A (en) * | 2019-05-07 | 2019-07-23 | 中山市武汉理工大学先进工程技术研究院 | A kind of sandstone aggregate detecting device for moisture content and method |
| CN110095514A (en) * | 2019-05-28 | 2019-08-06 | 南京信息工程大学 | A kind of moisture meter system convenient for data acquisition |
| CN110433904A (en) * | 2019-08-14 | 2019-11-12 | 安徽大洋自动化科技有限公司 | A kind of high precision electro resistive grain INTELLIGENT MOISTURE MEASUREMENT instrument |
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Application publication date: 20111116 |