CN202836695U - Dynamic weighing electronic balance - Google Patents
Dynamic weighing electronic balance Download PDFInfo
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- CN202836695U CN202836695U CN 201220528061 CN201220528061U CN202836695U CN 202836695 U CN202836695 U CN 202836695U CN 201220528061 CN201220528061 CN 201220528061 CN 201220528061 U CN201220528061 U CN 201220528061U CN 202836695 U CN202836695 U CN 202836695U
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Abstract
A dynamic weighing electronic balance is provided with a single chip microcomputer system, a receiving circuit, an amplification circuit, an analog-digital (A/D) conversion circuit, an input circuit, a display circuit, an alarm circuit and a serial communication circuit. The single chip microcomputer system controls a whole machine. The receiving circuit is used for receiving the weight of a weighed object. An input end of the amplification circuit is connected with the receiving circuit. An input end of the A/D conversion circuit is connected with the amplification circuit and an output end of the A/D conversion circuit is connected with the single chip microcomputer system. The input circuit is used for inputting a command signal. An output end of the input circuit is connected with the single chip microcomputer system. An input end of the display circuit is connected with the single chip microcomputer system. An input end of the alarm circuit is connected with the single chip microcomputer system. An input end of the serial communication circuit is connected with the single chip microcomputer system. According to the dynamic weighing electronic balance, a signal collected by a weighing sensor is amplified by two amplifiers in parallel connection and then amplified by a first level amplifier and calculated by a single chip microcomputer according to a pre-set procedure, the weight of the weighed object is displayed by the display circuit. Compared with an existing weighing device, the dynamic weighing electronic balance has the advantages of being high in automation degree, precise in weighing, convenient to carry and repair, capable of being widely popularized and used and the like.
Description
Technical field
The utility model belongs to the automatic control technology field, is specifically related to automatically control equipment or the device of weighing weight of object.
Background technology
The every field such as social life, commerce and trade, commercial production and agrotechnique all be unable to do without weighing measurement, so the use of scale must closely link to each other with daily life.For a long time, people use the mechanical scales such as pound, platform balance, spring balance to carry out article always and weigh, along with the accuracy requirement that people weigh to object is more and more higher, especially in technical fields such as Chemical Manufacture, noble metal, medicine, the accuracy of weight is often determining to manufacture quality and the performance of product.
Traditional mechanical scale is because the limitation of its principle of work, to further improve relatively difficulty of measuring accuracy, and existing maintenance and repair complexity, reaction velocity to wait slowly shortcoming, the requirement that more and more is difficult to satisfying the market is replaced by the electronic-weighing device electronic scales of a new generation gradually.
Electronic scales is combined into by machinery and electromechanics, compares with traditional mechanical scale, not only precision improves, easy to use, the value of weighing numeral directly demonstration be easy to read, and weighing-up wave can also directly transmit in certain distance.But be analog electronics because electronic scales mainly uses, make its job stability relatively poor, be subject to the impact of environment, precision and sensitivity are difficult to further raising.
Summary of the invention
Technical problem to be solved in the utility model is to overcome that above-mentioned machinery claims and the shortcoming of electronic scales, provide a kind of simple in structure, volume is little, automaticity is high, weighing is accurate, carry and dynamic weighing electronic scales easy to maintenance, that cost of products is low.
Solving the problems of the technologies described above the technical scheme that adopts is that it has: the Single Chip Microcomputer (SCM) system that complete machine is controlled; Be used for receiving by the receiving circuit of weighting objects weight; Amplifying circuit, the input termination receiving circuit of this circuit; The A/D change-over circuit, the input termination amplifying circuit of this circuit, output terminal connect Single Chip Microcomputer (SCM) system; The input circuit of input instruction signal, the output terminal of this circuit connects Single Chip Microcomputer (SCM) system; Display circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system; Warning circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system; Serial communication circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system.
Amplifying circuit of the present utility model is: 1 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U5 connect bridge circuit connect output terminal and connect inverting input 3 pin of integrated circuit U6, output terminal meets integrated circuit U7 by resistance R 4 in-phase input end 2 pin by resistance R 1 by resistance R 2; 3 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U6 connect bridge circuit connect output terminal, output terminal meet integrated circuit U7 by resistance R 5 inverting input 3 pin by resistance R 3; In-phase input end 2 pin of integrated circuit U7 connect output terminal and A/D change-over circuit by resistance R 7 ground connection, inverting input 3 pin by resistance R 6; The model of integrated circuit U5, integrated circuit U6, integrated circuit U7 is LF351.
The utility model amplifies through the one-level amplifier after adopting two amplifiers in parallel to amplify to the signal of LOAD CELLS collection again, and calculate according to the program of prior setting through single-chip microcomputer, demonstrated the weight of weighed object by display circuit, by the above course of work, greatly improve so that measure the weighting objects precision.The utility model is compared with existing weighing apparatus, have that movingization degree is high, weighing accurately, carry and the advantage such as easy to maintenance, can extensively promote the use of.
Description of drawings
Fig. 1 is electrical principle block scheme of the present utility model.
Fig. 2 is electronic circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Embodiment 1
In Fig. 1, the utility model is connected and composed by receiving circuit, amplifying circuit, A/D change-over circuit, input circuit, Single Chip Microcomputer (SCM) system, display circuit, warning circuit, serial communication circuit.The gravity that receiving circuit will receive weighed object number converts electric signal to and outputs to amplifying circuit, amplifying circuit amplifies the analog pulse electric signal of input to output to/the D converter, A/D converter converts the analog pulse electric signal of inputting to digital signal and outputs to Single Chip Microcomputer (SCM) system, the output termination display circuit of Single Chip Microcomputer (SCM) system and warning circuit and serial communication circuit, Single Chip Microcomputer (SCM) system is carried out computing according to the program of prior setting, result of calculation is outputed to display circuit, display circuit demonstrates the weight of weighed object, when the weight of weighed object overstepped the extreme limit weight, warning circuit sent alerting signal.
The receiving circuit of present embodiment is connected and composed by resistance R 15～resistance R 18, and resistance R 15～resistance R 18 is linked to be bridge circuit and consists of gravity sensor, and bridge circuit 1 pin and 3 pin connect amplifying circuit, 2 pin connect 6V positive source, 4 pin ground connection.
The amplifying circuit of present embodiment is connected and composed by integrated circuit U5, integrated circuit U6, integrated circuit U7, resistance R 1～resistance R 7, and the model of integrated circuit U5, integrated circuit U6, integrated circuit U7 is LF351.1 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U5 connect bridge circuit connect output terminal and connect inverting input 3 pin of integrated circuit U6, output terminal meets integrated circuit U7 by resistance R 4 in-phase input end 2 pin by resistance R 1 by resistance R 2; 3 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U6 connect bridge circuit connect output terminal, output terminal meet integrated circuit U7 by resistance R 5 inverting input 3 pin by resistance R 3; In-phase input end 2 pin of integrated circuit U7 connect output terminal and A/D change-over circuit by resistance R 7 ground connection, inverting input 3 pin by resistance R 6.
The A/D change-over circuit of present embodiment is made of integrated circuit U2, and the model of integrated circuit U2 is TL C1549.The output terminal of the ANALOG IN termination integrated circuit U7 of integrated circuit U2, power supply termination 5V positive source, hold ground connection, VOCLOCK end and DATAOUT end and CS termination Single Chip Microcomputer (SCM) system.
The input circuit of present embodiment is connected and composed by button K2, resistance R 8.The termination 5V positive source of button K2, the other end connect Single Chip Microcomputer (SCM) system by resistance R 8.When input circuit need to be removed the peel for weighed object, the K2 that pushes button, making this interface is high level, realizes the peeling function by Single Chip Microcomputer (SCM) system.
The Single Chip Microcomputer (SCM) system of present embodiment is connected and composed by integrated circuit U3, resistance R 9, resistance R 10, button K1, capacitor C 1～capacitor C 3, crystal oscillator Y1, and integrated circuit U3 is that the single-chip microcomputer model is AT89C51.The P1.5 of integrated circuit U3～P1.7 end connects respectively the VOCLOCK end of integrated circuit U2, the DATAOUT end, the CS end, the P21 end of integrated circuit U3 connects the other end of button K2 by resistance R 8, the oscillatory circuit that the XTAL1 end is connected with capacitor C with XTAL2 termination capacitor C2 and crystal oscillator Y1 connects, the end of RST termination capacitor C1 and connect the end of button K1 and by resistance R 10 ground connection by resistance R 9, another termination 5V positive source of the other end of button K1 and capacitor C 1, RXD end and the TXD termination serial communication circuit of integrated circuit U3, P0.0～P0.7 end and P2.5～P2.7 termination display circuit, P2.0 termination warning circuit.Single-chip microcomputer carries out computing according to the program of prior setting to the gravitational cue of inputting, and calculates by the weight of weighting objects, outputs to display circuit.
The display circuit of present embodiment is connected and composed by integrated circuit U4, resistance R 11, resistance R 12, and the model of integrated circuit U4 is LCD1602.The D0 of integrated circuit U4～D7 end connect respectively the end of the P2.7 that the P0.0 of integrated circuit U3～P0.7 end, RS end and resistance R W end and EN end meet respectively integrated circuit U3～P2.5 end, VO terminating resistor R11 and adjustable end, power supply termination 5V positive source, hold ground connection, BGVCC end to connect the 5V positive source by resistance R 12, another termination 5V positive source of resistance R 11.Display circuit demonstrates the weight of weighed object.
The warning circuit of present embodiment is connected and composed by triode Q1, hummer LS1, resistance R 13, resistance R 14.The base stage of triode Q1 is passed through resistance R 14 ground connection by the negative pole that P2.0 holds, collector meets hummer LS1, the emitter that resistance R 13 meets integrated circuit U3, and the positive pole of hummer LS1 connects the 5V positive source.When the object of being weighed overstepped the extreme limit weight, hummer LS1 sent alerting signal.
The serial communication circuit of present embodiment is connected and composed by integrated circuit U1, capacitor C 4～capacitor C 8, socket J1, and the model of integrated circuit U1 is MAX232.The T1IN of integrated circuit U1 connect an end of the other end of an end, power supply termination capacitor C 7 of an end, the V+ termination capacitor C7 of RXD end, R1IN end and T1OUT termination socket J1, the C1+ end of TXD end, R1OUT termination integrated circuit U3 of integrated circuit U3 and two ends that two ends, C2+ end and C2-end that the C1-end connects respectively capacitor C 4 connect respectively capacitor C 5, V-termination capacitor C6 and capacitor C 8 and connect the 5V positive source, the other end and the ground of termination capacitor C8, the other end ground connection of C6.
Principle of work of the present utility model is as follows:
Gravity sensor uses the bridge-type metering circuit, gravity sensor converts the variation of electrostrictive strain resistance to electric signal and divides two-way output, one the tunnel outputs to integrated circuit U5, another road outputs to integrated circuit U6, and the electric signal after integrated circuit U5 and integrated circuit U6 amplification outputs to integrated circuit U7 again and amplifies.Convert digital signal through the analog pulse electric signal that amplifies to through integrated circuit U7 and output to single-chip microcomputer integrated circuit U3, Single Chip Microcomputer (SCM) system is carried out computing according to the program of prior setting, the weight of weighed object is outputed to the result output to integrated circuit U4, integrated circuit U4 demonstrates the weight of weighed object, when the weight of weighed object oversteps the extreme limit weight, integrated circuit U4 outputs a control signal to the hummer LS1 of warning circuit, hummer LS1 sends alerting signal, when the weight of weighed object during less than limit weight, triode Q1 cut-off, hummer LS1 stops pronunciation.
When in weighing process, needing weighed object removed the peel, the operator K2 that pushes button, single-chip microcomputer carries out computing according to the program of prior setting, calculates the weight of weighed object.Single-chip microcomputer also can communicate by integrated circuit U1 and external computing machine.
Claims (2)
1. dynamic weighing electronic scales is characterized in that it has:
The Single Chip Microcomputer (SCM) system that complete machine is controlled;
Be used for receiving by the receiving circuit of weighting objects weight;
Amplifying circuit, the input termination receiving circuit of this circuit;
The A/D change-over circuit, the input termination amplifying circuit of this circuit, output terminal connect Single Chip Microcomputer (SCM) system;
The input circuit of input instruction signal, the output terminal of this circuit connects Single Chip Microcomputer (SCM) system;
Display circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system;
Warning circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system;
Serial communication circuit, the input end of this circuit connects Single Chip Microcomputer (SCM) system.
2. dynamic weighing electronic scales according to claim 1, it is characterized in that described amplifying circuit is: 1 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U5 connect bridge circuit connect output terminal and connect inverting input 3 pin of integrated circuit U6, output terminal meets integrated circuit U7 by resistance R 4 in-phase input end 2 pin by resistance R 1 by resistance R 2; 3 pin, inverting input 3 pin that in-phase input end 2 pin of integrated circuit U6 connect bridge circuit connect output terminal, output terminal meet integrated circuit U7 by resistance R 5 inverting input 3 pin by resistance R 3; In-phase input end 2 pin of integrated circuit U7 connect output terminal and A/D change-over circuit by resistance R 7 ground connection, inverting input 3 pin by resistance R 6; The model of integrated circuit U5, integrated circuit U6, integrated circuit U7 is LF351.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528061 CN202836695U (en) | 2012-10-13 | 2012-10-13 | Dynamic weighing electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528061 CN202836695U (en) | 2012-10-13 | 2012-10-13 | Dynamic weighing electronic balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836695U true CN202836695U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528061 Expired - Fee Related CN202836695U (en) | 2012-10-13 | 2012-10-13 | Dynamic weighing electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836695U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486392A (en) * | 2016-01-20 | 2016-04-13 | 常熟理工学院 | Small electronic weighing system based on single-chip microcomputer |
| CN107024261A (en) * | 2017-04-07 | 2017-08-08 | 成都缔客行势网络科技有限公司 | Simple light minisize electronic scales |
| CN107215494A (en) * | 2017-03-25 | 2017-09-29 | 南宁市广千信息技术有限公司 | Quantitative weighing system |
| CN107966202A (en) * | 2017-12-14 | 2018-04-27 | 来学宝 | Electronic scale weighing module and its implementation |
-
2012
- 2012-10-13 CN CN 201220528061 patent/CN202836695U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486392A (en) * | 2016-01-20 | 2016-04-13 | 常熟理工学院 | Small electronic weighing system based on single-chip microcomputer |
| CN107215494A (en) * | 2017-03-25 | 2017-09-29 | 南宁市广千信息技术有限公司 | Quantitative weighing system |
| CN107024261A (en) * | 2017-04-07 | 2017-08-08 | 成都缔客行势网络科技有限公司 | Simple light minisize electronic scales |
| CN107966202A (en) * | 2017-12-14 | 2018-04-27 | 来学宝 | Electronic scale weighing module and its implementation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20131013 |