CN201680888U - Wireless precision electronic scale - Google Patents
Wireless precision electronic scale Download PDFInfo
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- CN201680888U CN201680888U CN2010201873411U CN201020187341U CN201680888U CN 201680888 U CN201680888 U CN 201680888U CN 2010201873411 U CN2010201873411 U CN 2010201873411U CN 201020187341 U CN201020187341 U CN 201020187341U CN 201680888 U CN201680888 U CN 201680888U
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Abstract
The utility model discloses a wireless precision electronic scale. A central processor circuit of the wireless precision electronic scale is respectively connected with an amplification filter circuit, a wireless transceiver module circuit, a first power supply conversion circuit, a second power supply conversion circuit, a manual peeling button, a working condition indicating lamp and a power supply voltage indicating lamp. A force sensor is connected with the amplification filter circuit. The first power supply conversion circuit is also respectively connected with the force sensor and the amplification filter circuit. The second power supply conversion circuit is also connected with the wireless transceiver module circuit. Interference is reduced by adopting a wireless communication mode. An upper computer carries out command set and information read-out scheme on the electronic scale by a wireless mode. According to the utility model, the precision of the electronic scale can be improved by employing a combination of software filtering and hardware filtering and an IC device with low temperature drift, the power consumption of the electronic scale can be reduced by employing a simple and scientific communication format to satisfy various communication functions of upper and lower computers. The scale provided by the utility model enables high-precision weighing, long-distance transmission, flexible distribution, and has a simple structure and reduced cost.
Description
Technical field
The utility model relates to weighing apparatus, relates in particular to a kind of wireless type Precision Electronics Balance.
Background technology
For a long time, the mode of generally taking in the field of weighing is that scale directly shows by charactron after weight, then by artificial reading and recording.Some electronic scaless realizes with no paper, but directly carries out data transmission by wired mode.Manually read and will expend great deal of labor, there is very big uncertainty in the people under the work of repeatability simultaneously, and the error of introducing is very big, if also will carry out the data electronization, the centre can increase cost again and introduce error.If realize data transmission by wiring, can increase wiring cost like this, and in the transmission course of signal, can be interfered, can introduce error again.These errors all need at utmost reduce in the high-precision field of weighing.
Summary of the invention
The purpose of this utility model is to provide a kind of wireless type Precision Electronics Balance.
The technical solution adopted in the utility model is as follows:
The utility model comprises amplification filtering circuit, central processing unit circuit, radio receiving transmitting module circuit, first power-switching circuit, second source change-over circuit, manually removes the peel button, working station indicator, supply voltage pilot lamp and force transducer; The central processing unit circuit is respectively with amplification filtering circuit, radio receiving transmitting module circuit, first power-switching circuit, second source change-over circuit, manually remove the peel button, working station indicator is connected with the supply voltage pilot lamp, force transducer is connected with the amplification filtering circuit, first power-switching circuit also is connected with the amplification filtering circuit with force transducer respectively, and the second source change-over circuit also is connected with the radio receiving transmitting module circuit.
Described amplification filtering circuit comprises instrumentation amplifier AD620 and amplifier OP07; Instrumentation amplifier AD620 is connected with force transducer, and the output of amplifier OP07 is connected with the AD mouth of central processing unit circuit, and it is powered by first power-switching circuit.
Described first power-switching circuit comprises 9013 triode Q1, IRF4905MOS pipe M1, SPX2940 power supply chip U1, CAT660 power supply chip, and the base stage of 9013 triode Q1 is connected with the I/O mouth of central processing unit circuit.
Described first power-switching circuit comprises 9013 triode Q2, IRF4905MOS pipe M2, SPX2940 power supply chip U2, the base stage of 9013 triode Q2 is connected with the I/O mouth of central processing unit circuit, and the output of SPX2940 power supply chip U2 is connected to the energization pins of radio receiving transmitting module circuit.
The beneficial effect that the utlity model has is:
Adopt the mode of wireless telecommunications to reduce cost, reduced interference.Host computer carries out the scheme that order setting, information are read by wireless mode to electronic scales, the IC device that adopts software and hardware filtering and low temperature to float improves the electronic scales precision, adopt the communication format of simple science to satisfy the various communication functions of upper and lower computer, adopt reasonable circuit design and control strategy to reduce the electronic scales power consumption.Reached the electronic scales of full scale 20kg at last, under steady temperature, fluctuation is no more than 20g (per mille precision) to the repeatedly measurement result of fixed weight; In 0～60 ° the scope, the influence that temperature is floated the result is no more than 40g.6V2.8Ah lead-acid accumulator fill once electricity and can use half a year for electronic scales.
Realize the wireless transmission of weighing-up wave by the mode of wireless telecommunications, like this electronic scales lay very flexibly, the very simple exquisiteness that structure can be done simultaneously, has reduced long distance wiring, has reduced interference, has reduced cost.By energy-saving hardware design and software control, can in for a long time, need not charge again simultaneously, greatly reduce human cost.
Description of drawings
Fig. 1 is an electronic scales principle of work block diagram.
Fig. 2 is an electronic scales system software process flow diagram.
Fig. 3 is the frame format figure of upper and lower computer communication.
Fig. 4 is the first power-switching circuit schematic diagram.
Fig. 5 is a second source change-over circuit schematic diagram.
Fig. 6 is the amplification filtering circuit theory diagrams.
Fig. 7 is wireless type Precision Electronics Balance circuit theory diagrams.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model comprises amplification filtering circuit 1, central processing unit circuit 2, radio receiving transmitting module circuit 3, first power-switching circuit 4, second source change-over circuit 5, manually removes the peel button 6, working station indicator 7, supply voltage pilot lamp 8 and force transducer 9; Central processing unit circuit 2 is respectively with amplification filtering circuit 1, radio receiving transmitting module circuit 3, first power-switching circuit 4, second source change-over circuit 5, manually remove the peel button 6, working station indicator 7 is connected with supply voltage pilot lamp 8, force transducer 9 is connected with amplification filtering circuit 1, first power-switching circuit 4 also is connected with amplification filtering circuit 1 with force transducer 9 respectively, and second source change-over circuit 5 also is connected with radio receiving transmitting module circuit 3.Under the power supply of power-switching circuit 1, force transducer 9 is converted into faint voltage signal with the power that is subjected to, this signal is by behind the amplification filtering circuit 1, enter central processing unit circuit 2, by AD sampling, software filtering, the linear difference of 2 pairs of signals of central processing unit circuit, obtain the size of pressure.Central processing circuit is launched signal modulation back by radio receiving transmitting module circuit 3.
As shown in Figure 6, described amplification filtering circuit 1 comprises instrumentation amplifier AD620 and amplifier OP07; Instrumentation amplifier AD620 is connected with force transducer 9, and the output of amplifier OP07 is connected with the AD mouth of central processing unit circuit 2, and it is by 4 power supplies of first power-switching circuit.
As shown in Figure 4, described first power-switching circuit 4 comprises 9013 triode Q1, IRF4905MOS pipe M1, SPX2940 power supply chip U1, CAT660 power supply chip, the base stage of 9013 triode Q1 is connected with the I/O mouth of central processing unit circuit 2, SPX2940 power supply chip U1+5v output respectively with force transducer 9, amplification filtering circuit 1 China National Instruments Import ﹠ Export Corporation with amplifier AD620 and amplifier OP07+the 5v energization pins links to each other, the CAT660 power supply chip-5v export respectively with amplification filtering circuit 1 China National Instruments Import ﹠ Export Corporation with amplifier AD620 and amplifier OP07-the 5v energization pins links to each other.
As shown in Figure 5, described first power-switching circuit 4 comprises 9013 triode Q2, IRF4905MOS pipe M2, SPX2940 power supply chip U2, the base stage of 9013 triode Q2 is connected with the I/O mouth of central processing unit circuit 2, and the output of SPX2940 power supply chip U2 is connected to the energization pins of radio receiving transmitting module circuit 3.
Be illustrated in figure 7 as the total circuit structure schematic diagram of wireless type Precision Electronics Balance.Manually remove the peel button 7 as can be seen, working station indicator 8, supply voltage pilot lamp 9 links to each other with the I/O mouth of central processing unit circuit 2, is used for realizing functions such as the peeling of manual button, indication electronic scales duty, instructed voltage be whether normal.
The system software idiographic flow during software design, in master routine, is finished necessary initialization procedure and is promptly entered low power consumpting state afterwards as shown in Figure 2.Wait for after respective interrupt takes place and enter interrupt service routine.The interruption of using mainly contains: serial ports receives and interrupts, and serial ports sends and interrupts, and AD changes interruption, and timer interrupts.Wherein the timer interruption is main the interruption, comes the running status of dispatching system by it.
Upper and lower computer carries out the transmission of information and steering order by command frame.Host computer can be realized reading weight, reads AD, reads voltage, corrected value is set, reads corrected value, sets functions such as dormancy time, peeling by wireless telecommunications.Order format as shown in Figure 3, wherein all bytes are ascii character.
The concrete course of work:
1, by reading the instruction of AD value, the AD value under 0kg, 5kg, 10kg, 15kg, five quality of 20kg is read.
2, by the check point instruction is set, above-mentioned five check points are carried out the setting of AD value.This moment, the AD value of five check points deposited among the FLASH of slave computer.When reading other weight, can carry out linear difference according to these five check points and try to achieve weight.
3, by the peeling instruction, electronic scales is removed the peel.Can obtain 0kg when reading weight this moment.
4, can carry out reading of weight to electronic scales by reading the weight instruction after the peeling.Attention: dormancy time will be made as 0 when reading weight, if reading is finished, then dormancy time be made as the time that needs, single-chip microcomputer will enter dormant state, and this moment, slave computer can't respond the instruction of host computer.When the time then, single-chip microcomputer wakes up, can proceed various operations such as weight reads again.
5, for the precision of test macro, respectively 4kg, 11kg, three standard quality pieces of 17kg are carried out 10 continuous weight and read, it is as shown in the table to read the result:
The n time 123456789 10
Read 4444444 3.99 3.99 4
/kg 17 16.99 17 16.99 17 17 16.99 17 17 17
By measurement result as can be seen, the precision of electronic scales is very high, and maximum deviation 20g, weighing results are very stable.
Host computer can be the ARM controller of PC or band serial ports.By serial port programming being realized the communication of host computer and wireless module, host computer just can carry out the order setting to slave computer and state reads by wireless module like this.
Claims (4)
1. wireless type Precision Electronics Balance, it is characterized in that: comprise amplification filtering circuit (1), central processing unit circuit (2), radio receiving transmitting module circuit (3), first power-switching circuit (4), second source change-over circuit (5), manually remove the peel button (6), working station indicator (7), supply voltage pilot lamp (8) and force transducer (9); Central processing unit circuit (2) is respectively with amplification filtering circuit (1), radio receiving transmitting module circuit (3), first power-switching circuit (4), second source change-over circuit (5), manually remove the peel button (6), working station indicator (7) is connected with supply voltage pilot lamp (8), force transducer (9) is connected with amplification filtering circuit (1), first power-switching circuit (4) also is connected with amplification filtering circuit (1) with force transducer (9) respectively, and second source change-over circuit (5) also is connected with radio receiving transmitting module circuit (3).
2. a kind of wireless type Precision Electronics Balance according to claim 1 is characterized in that: described amplification filtering circuit (1) comprises instrumentation amplifier AD620 and amplifier OP07; Instrumentation amplifier AD620 is connected with force transducer (9), and the output of amplifier OP07 is connected with the AD of central processing unit circuit (2), and it is powered by first power-switching circuit (4).
3. a kind of wireless type Precision Electronics Balance according to claim 1, it is characterized in that: described first power-switching circuit (4) comprises 9013 triode Q1, IRF4905MOS pipe M1, SPX2940 power supply chip U1, CAT660 power supply chip, and the base stage of 9013 triode Q1 is connected with the I/O mouth of central processing unit circuit (2).
4. a kind of wireless type Precision Electronics Balance according to claim 1, it is characterized in that: described second source change-over circuit (5) comprises 9013 triode Q2, IRF4905MOS pipe M2, SPX2940 power supply chip U2, the base stage of 9013 triode Q2 is connected with the I/O mouth of central processing unit circuit (2), and the output of SPX2940 power supply chip U2 is connected to the energization pins of radio receiving transmitting module circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201873411U CN201680888U (en) | 2010-05-11 | 2010-05-11 | Wireless precision electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201873411U CN201680888U (en) | 2010-05-11 | 2010-05-11 | Wireless precision electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201680888U true CN201680888U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201873411U Expired - Lifetime CN201680888U (en) | 2010-05-11 | 2010-05-11 | Wireless precision electronic scale |
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| Country | Link |
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| CN (1) | CN201680888U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528649A (en) * | 2013-09-18 | 2014-01-22 | 宁波高诚自动化科技有限公司 | Cone-shaped sewing thread quality inspection and analysis system and method |
| CN103884412A (en) * | 2014-03-10 | 2014-06-25 | 咸阳华潮衡器有限公司 | Intelligent kitchen scale |
| CN106033008A (en) * | 2016-03-17 | 2016-10-19 | 天津金盛特电子有限公司 | Wireless electronic weighing scale circuit |
| CN110702199A (en) * | 2019-09-25 | 2020-01-17 | 联想(北京)有限公司 | Information processing method and first electronic equipment |
-
2010
- 2010-05-11 CN CN2010201873411U patent/CN201680888U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528649A (en) * | 2013-09-18 | 2014-01-22 | 宁波高诚自动化科技有限公司 | Cone-shaped sewing thread quality inspection and analysis system and method |
| CN103528649B (en) * | 2013-09-18 | 2015-07-29 | 宁波高诚自动化科技有限公司 | Cotton sewing thread on cone quality testing analytic system and method |
| CN103884412A (en) * | 2014-03-10 | 2014-06-25 | 咸阳华潮衡器有限公司 | Intelligent kitchen scale |
| CN106033008A (en) * | 2016-03-17 | 2016-10-19 | 天津金盛特电子有限公司 | Wireless electronic weighing scale circuit |
| CN110702199A (en) * | 2019-09-25 | 2020-01-17 | 联想(北京)有限公司 | Information processing method and first electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101222 |