CN103718734A - Grain loss monitoring device - Google Patents
Grain loss monitoring device Download PDFInfo
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- CN103718734A CN103718734A CN201410013431.1A CN201410013431A CN103718734A CN 103718734 A CN103718734 A CN 103718734A CN 201410013431 A CN201410013431 A CN 201410013431A CN 103718734 A CN103718734 A CN 103718734A
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- grain loss
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Abstract
The invention discloses a grain loss monitoring device which comprises a microprocessor, a grain loss measuring sensor, a charge-amplifier, an RC low pass filter, an RC high pass filter, an amplifier, an average circuit, an A/D converter, a D/A converter, an asynchronous motor and a fan. The microprocessor is provided with the input end and the output end. The grain loss measuring sensor, the charge-amplifier, the RC low pass filter, the RC high pass filter, the amplifier, the average circuit and the A/D converter are sequentially connected with one another in the single direction. The output end of the A/D converter is connected with the input end of the microprocessor. One end of the D/A converter is connected with the output end of the microprocessor, and the other end of the D/A converter is connected with a frequency changer. The asynchronous motor and the fan are used for executing instruction action of the microprocessor and are connected to the output end of the frequency changer (13). The grain loss monitoring device can effectively monitor grain loss conditions and reduce grain loss rate so as to improve working quality and improve economic benefits. The grain loss monitoring device is high in operation automation degree, can automatically detect, display, alarm and remind the grain loss rate on the condition that not manual interference is needed, can adjust the rotating speed of the fan according to actual grain loss conditions, and is stable in quality and high in efficiency.
Description
[technical field]
The present invention relates to the grain loss supervising device of a kind of agricultural machinery aspect, be mainly used in combine, cereal machinery cleaning mechanism, this device is guaranteeing under the objectivity of monitoring result and the prerequisite of reliability, the situation that can allow the clear grain of the timely and effective understanding of driver lose, and automatically adjust blower fan blowing amount according to damaed cordition, reduce grain loss, increase economic efficiency.
[background technology]
According to market survey and patent retrieval, cleaning mechanism is an important component part of combine, grain cleaning machinery.In the performance test of cleaning mechanism, grain loss rate is an important indicator.What the large multi-model cleaning mechanism of China's grain combine still adopted is centrifugal blower, vibratory sieve or centrifugal blower, drum sieve formula dressing mechanism.After grain husking, the mode of drying by blower fan blows away husk etc., also can carry a part of grain simultaneously, if the blowing amount of blower fan is too large, the grain carrying in husk will be more, thereby makes grain loss rate increase.For a long time, the grain loss monitoring of cleaning mechanism mainly contains two kinds of modes: one is to adopt manually to clean, counting loss rate, and operating efficiency is very low; Another kind is to utilize the signal that supervisory instrument records sensor to analyze, process, and with canonical parameter contrast, judge, but do not possess intelligent processing method function, and complex structure, inconvenient operation, the problem such as manufacturing cost is high, and automaticity is low.
In order to overcome the problems referred to above, I have developed a kind of grain loss supervising device, and it can the clear grain damaed cordition of effective monitoring, reduce clear grain percent of loss, thereby job enrichment is increased economic efficiency.
[summary of the invention]
Object of the present invention technical problem to be solved is that a kind of grain loss supervising device will be provided, and it has safe and reliable, with low cost, long service life; It can the clear grain damaed cordition of effective monitoring, reduce clear grain percent of loss, thereby job enrichment is increased economic efficiency.Operating automation degree is high, effectively increases work efficiency.Therefore it is the product that a kind of technical and economy all has superior function.
To achieve these goals, the technical solution used in the present invention is: a kind of grain loss supervising device, and it comprises:
Microprocessor, it has input and output;
The grain loss measuring transducer of unidirectional connection, charge amplifier, RC low pass filter, RC high-pass filter, amplifier, averaging circuit and A/D converter successively, the output of described A/D converter is connected with the input of described microprocessor;
D/A converter, one end is connected in the output of described microprocessor; The other end connects frequency converter, is connected in described frequency converter 13 outputs to carry out asynchronous motor and the blower fan of described microprocessor instruction action.
Further, it also comprises:
Acoustic-optic alarm, for receiving the alarm signal of described microprocessor, to carry out acousto-optic warning action;
LED charactron, described microprocessor receives the data signal of described A/D converter input and carries out scale conversion, converts binary number to and sends into described LED charactron 10, to show grain loss data;
Keyboard, it is connected with described microprocessor is two-way.
Further, described microprocessor is single-chip microcomputer or PLC.
Further, described grain loss measuring transducer is installed on cleaning shoe afterbody.
Further, by man-machine interaction mode, from described keyboard, input, to determine the setting value of grain loss rate.
Further, described LED charactron shows grain loss situation in real time.
Further, described acoustic-optic alarm exceeds setting value by grain loss, to send sound/light, warns.
Further, what described grain loss measuring transducer adopted is piezoelectric acceleration transducer, and described microprocessor is 88031 single-chip microcomputers.
Further, described amplifier adopts t1081 chip, and that A/D converter adopts is ADC0809, and D/A converter is DAC0832.
What further, described acoustic-optic alarm adopted is piezoelectric buzzer.
The present invention compares produced beneficial effect with background technology:
The present invention has adopted technique scheme, and it has safe and reliable, with low cost, long service life; It can the clear grain damaed cordition of effective monitoring, reduce clear grain percent of loss, thereby job enrichment is increased economic efficiency.Operating automation degree is high, does not need automatic detection, demonstration, warning reminding to grain loss rate in the situation of manual intervention, and can to the rotating speed of blower fan, adjust according to actual grain loss situation, and steady quality, efficiency are high.Therefore it is the product that a kind of technical and economy all has superior function.
[accompanying drawing explanation]
Fig. 1 is the structured flowchart of a kind of grain loss supervising device in embodiments of the invention;
Fig. 2 is the combining structure schematic diagram of acoustic-optic alarm 9, LED charactron 10 and keyboard 11 in embodiments of the invention;
Fig. 3 is the interface circuit of D/A converter 16 and microprocessor 8 in embodiments of the invention;
Fig. 4 is the interface circuit of A/D converter 7 and microprocessor 8 in embodiments of the invention;
Mark in figure:
1--RC low pass filter;
2--charge amplifier;
3--grain loss measuring transducer;
4--RC high-pass filter;
5--amplifier;
6--averaging circuit;
7--A/D converter;
8--microprocessor;
9--acoustic-optic alarm;
10--LED charactron;
11--keyboard;
12--power supply;
13--frequency converter;
14--asynchronous motor;
15--blower fan;
16--D/A converter.
[embodiment]
Describe embodiments of the invention below in detail, described embodiment example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by embodiment is described with reference to the drawings, be exemplary, be intended to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it should be noted that, for the noun of locality, if any term " " center ", " laterally ", " longitudinally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", indicating positions such as " counterclockwise " and position relationship are based on orientation shown in the drawings or position relationship, only for the ease of narration the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with particular orientation structure and operation, can not be interpreted as limiting concrete protection domain of the present invention.
In addition, if any term " first ", " second ", only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates technical characterictic.Thus, be limited with that " first ", " second " feature can be expressed or implicit one or more this feature that comprises, in the present invention describes, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, except as otherwise clearly stipulating and limiting, if any terms such as term " assembling ", " being connected ", " connection ", " fixing ", should go to understand as broad sense, for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Also can be mechanical connection, can be also electrical connection; Can be to be directly connected, can be to be also connected by intermediary, can be that two element internals are connected.For those of ordinary skills, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In invention, unless otherwise prescribed and limit, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " under " and " above " comprise the and levy directly over Second Characteristic and oblique upper, or be only to represent the height of First Characteristic level height higher than Second Characteristic.First Characteristic Second Characteristic " on ", " under " and " below " comprise First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is lower than Second Characteristic.
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention is further described, make technical scheme of the present invention and beneficial effect thereof clearer, clear and definite.
Shown in accompanying drawing 1-4, it preferably provides embodiment for the present invention, a kind of grain loss supervising device, and it comprises:
The grain loss measuring transducer 3 of unidirectional connection, charge amplifier 2, RC low pass filter 1, RC high-pass filter 4, amplifier 5, averaging circuit 6 and A/D converter 7 successively, the output of described A/D converter 7 is connected with the input of described microprocessor 8;
D/A converter 16, one end is connected in the output of described microprocessor 8; The other end connects frequency converter 13, is connected in described frequency converter 13 outputs to carry out asynchronous motor 14 and the blower fan 15 of described microprocessor 8 instruction actions.
Preferably, it also comprises:
Acoustic-optic alarm 9, for receiving the alarm signal of described microprocessor 8, to carry out acousto-optic warning action;
Preferably, described microprocessor 8 is 8031 single-chip microcomputers.
Preferably, described grain loss measuring transducer 3 is installed on cleaning shoe afterbody.
Preferably, by man-machine interaction mode, from described keyboard 11, input, to determine the setting value of grain loss rate.
Preferably, described LED charactron 10 shows grain loss situation in real time.
Preferably, described acoustic-optic alarm 9 exceeds setting value by grain loss, to send sound/light, warns.
What preferably, described grain loss measuring transducer 3 adopted is piezoelectric acceleration transducer.
Preferably, described amplifier 5 adopts t1081 chip, and that A/D converter 7 adopts is ADC0809, and D/A converter 16 is DAC0832.
What preferably, described acoustic-optic alarm 9 adopted is piezoelectric buzzer.
Comprehensive foregoing in conjunction with institute's drawings attached, further describes the operation principle of the present embodiment:
During work, grain loss measuring transducer 3 is installed on cleaning shoe afterbody (not shown), when the grain being blown falls grain loss measuring transducer 3 is clashed into, grain loss measuring transducer 3 converts impact strength to electric impulse signal, this signal is after charge amplifier 2, be transformed into ac voltage signal, through RC low pass filter 1, RC high-pass filter 4 will be by weeds, cane, soil stone clashes into sensor the low frequency signal and the high-frequency signal that produce and filters out, through amplifier 5, voltage signal is amplified, and convert ac voltage signal to d. c. voltage signal through averaging circuit 6, sending into voltage-type A/D converter 7 is transformed into binary data and sends into single-chip microcomputer 8 and process, single-chip microcomputer 8 carries out scale conversion to the data signal of input on the one hand, convert binary number to and send into LED charactron 10, show grain loss data, the grain loss data that measure on the other hand exceed the grain loss scope of permission, produce alarm signal and send into acoustic-optic alarm 9, and produce a digital quantity control signal, this signal becomes analog signal through D/A converter 16, analog signals is sent into frequency converter 13, change the frequency of asynchronous motor 14 power supplys, thereby adjust the rotating speed of asynchronous motor 14, regulate blower fan 15 blowing amounts, change the amount that grain is blown.If actual grain loss is excessive; the blower fan that is operated in frequency converter adjustment mode is still not enough to reduce percent of loss after adjusting; illustrate that it is very much not because rotation speed of fan causes that clear grain lost; but because other factors causes; such as the fault of the amplitude of cleaning mechanism vibratory sieve and the generation of the adjustable plate position of impurity discharging port; should hard stop, to causing the adjustment that places under repair of the parts of fault.Power supply 12 provides corresponding voltage according to the needs of each device.No longer need automatic detection, demonstration, warning reminding to grain loss rate in the situation of manual intervention, and can to the rotating speed of blower fan 15, adjust according to actual grain loss situation, steady quality, efficiency are high.
Shown in Fig. 2, acoustic-optic alarm 9, LED charactron 10 and keyboard 11 form structure, can be called man-machine interface, and wherein 9,6 LED charactrons 10 of 3 buzzers composition acoustic-optic alarms form display field, 18 keys composition keyboards 11.Certainly, this is only cited embodiment, and the concrete quantity of acoustic-optic alarm 9 of the present invention, LED charactron 10 and keyboard 11 can not limit above-mentioned restriction.
Shown in Fig. 3, the interface circuit of 8031 single-chip microcomputers that the DAC0832 that D/A converter 16 adopts and microprocessor 8 adopt, addressing mode is address decoding method, the address decoder of selecting is 74LS138, adopts Y3 pin as chip selection signal.Chip selection signal produces enabling signal START and the address latch signal ALE of ADC0809 together with signal through NOR gate, chip selection signal produces ADC0809 output through NOR gate and allows signal OE together with signal.During OE=1, gating triple gate makes the transformation result in output latch send into data/address bus.The eoc signal of ADC0809 is received 8031 pin for generation of the interrupt request singal converting after anti-phase.
Shown in Fig. 4, A/D converter 7 is the interface circuit that ADC0809 and microprocessor 8 adopt 8031 single-chip microcomputers, the feedback resistance that Rfb provides for external arithmetic amplifier.Vref end is to provide the reference power supply of one+10V～-10V by external circuit for chip.At Iout1, be connected dual-stage amplifier with the output of Iout2, made DAC0832 there is the function of zeroing and tune full scale.
Separately be noted that PLC is programmable logic controller (PLC).English full name is: Programmable Logic Controller, it adopts a class programmable memory, for its internally stored program, actuating logic computing, sequential control, regularly, the user oriented instruction such as counting and arithmetical operation, and by numeral or analog pattern input/output various types of machinery of control or production process.In this enforcement, also can adopt programming digital control system PLC as central control system, useful touch-screen is realized program input and the operation of complete machine and is controlled, grain loss measurement, signal transmission and conversion, instruction asynchronous machine and the blower fan of realizing a kind of grain loss supervising device refer to the strokes such as row corresponding actions and the back and forth automation of process, and according to the preset various parameters of different grain, to different work cereal, need to carry out complete machine operation and control, to enhance productivity.Single-chip microcomputer is a kind of IC chip, have volume little, control strong, low in energy consumption, the adaptive capacity to environment of function strong, expand the advantages such as flexible and easy to use, when selecting, can carry out according to different needs the adjustment of suitable model.Certainly, these are applied to concrete execution step and instruction encoding and algorithm, at this, no longer carry out detailed expansion.Those of ordinary skills, being all appreciated that can be by adopting PLC or single-chip microcomputer can realize executive mode of the present invention and step and corresponding actions completely.
In the description of specification, the description of reference term " embodiment ", " preferably ", " example ", " concrete example " or " some examples " etc. means specific features, structure, material or the feature in conjunction with this embodiment or example description, be contained at least one embodiment of the present invention or example, for the schematic statement of above-mentioned term, not necessarily refer to identical embodiment or example in this manual.And specific features, structure, material or the feature of description can be with suitable method combination in any one or more embodiment or example.
By the description of above-mentioned structure and principle; person of ordinary skill in the field is to be understood that; the present invention is not limited to above-mentioned embodiment; on basis of the present invention, adopt the improvement of techniques well known and substitute and all drop on protection scope of the present invention, should limit it by each claim.
Claims (10)
1. a grain loss supervising device, is characterized in that, it comprises:
Microprocessor, it has input and output;
The grain loss measuring transducer of unidirectional connection, charge amplifier, RC low pass filter, RC high-pass filter, amplifier, averaging circuit and A/D converter successively, the output of described A/D converter is connected with the input of described microprocessor;
D/A converter, one end is connected in the output of described microprocessor; The other end connects frequency converter, is connected in described inverter output terminal to carry out asynchronous motor and the blower fan of described microprocessor instruction action.
2. grain loss supervising device according to claim 1, is characterized in that, it also comprises:
Acoustic-optic alarm, for receiving the alarm signal of described microprocessor, to carry out acousto-optic warning action;
LED charactron, described microprocessor receives the data signal of described A/D converter input and carries out scale conversion, converts binary number to and sends into described LED charactron, to show grain loss data;
Keyboard, it is connected with described microprocessor is two-way.
3. grain loss supervising device according to claim 1 and 2, is characterized in that: described microprocessor is single-chip microcomputer or PLC.
4. grain loss supervising device according to claim 3, is characterized in that: described grain loss measuring transducer is installed on cleaning shoe afterbody.
5. grain loss supervising device according to claim 2, is characterized in that: by man-machine interaction mode, from described keyboard, input, to determine the setting value of grain loss rate.
6. grain loss supervising device according to claim 5, is characterized in that: described LED charactron shows grain loss situation in real time.
7. grain loss supervising device according to claim 6, is characterized in that: described acoustic-optic alarm exceeds setting value by grain loss, to send sound/light, warns.
8. grain loss supervising device according to claim 1 and 2, is characterized in that: what described grain loss measuring transducer adopted is piezoelectric acceleration transducer, and described microprocessor is 88031 single-chip microcomputers.
9. grain loss supervising device according to claim 8, is characterized in that: described amplifier adopts t1081 chip, and that A/D converter adopts is ADC0809, and D/A converter is DAC0832.
10. grain loss supervising device according to claim 7, is characterized in that: what described acoustic-optic alarm adopted is piezoelectric buzzer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013431.1A CN103718734A (en) | 2014-01-10 | 2014-01-10 | Grain loss monitoring device |
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|---|---|---|---|
| CN201410013431.1A CN103718734A (en) | 2014-01-10 | 2014-01-10 | Grain loss monitoring device |
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| CN103718734A true CN103718734A (en) | 2014-04-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856808A (en) * | 2015-12-11 | 2017-06-20 | 中国科学院沈阳自动化研究所 | Combine Harvester Grain flow detector and measuring method |
| CN109443420A (en) * | 2018-09-03 | 2019-03-08 | 江苏大学 | A kind of combined harvester blower quality detection device and its detection method |
| RU2783603C1 (en) * | 2022-02-07 | 2022-11-15 | федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный аграрный университет" (ФГБОУ ВО Волгоградский ГАУ) | Automatic system for monitoring and controlling the fan speed of a grain harvester |
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Application publication date: 20140416 |