CN203337299U - Resistance strain-type multi-channel high-accuracy force measurement system - Google Patents
Resistance strain-type multi-channel high-accuracy force measurement system Download PDFInfo
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- CN203337299U CN203337299U CN2013204138505U CN201320413850U CN203337299U CN 203337299 U CN203337299 U CN 203337299U CN 2013204138505 U CN2013204138505 U CN 2013204138505U CN 201320413850 U CN201320413850 U CN 201320413850U CN 203337299 U CN203337299 U CN 203337299U
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Abstract
The utility model relates to a resistance strain-type multi-channel high-accuracy force measurement system. The resistance strain-type multi-channel high-accuracy force measurement system is provided with a single chip, an intelligent stress measurement and A/D (analogue/digital) conversion circuit, a multi-channel input signal switchover circuit, a stress sensor, an AT45DB161 storage and a serial CAN (controller area network) conversion circuit, wherein the single chip uses a 8051F410 single chip internally provided with an A/D analogue input and an I2C (inter-integrated circuit) multi-computer communication interface; and the output end of the stress sensor is connected to the stress measurement input end of the single chip after through the multi-channel input signal switchover circuit and the intelligent stress measurement and A/D conversion circuit. The product has the advantages of being simple in hardware circuit structure, fast in computation speed and response speed, free from occupying the software running resource of a CPU (central processing unit), capable of realizing multi-computer communication and high-speed information transmission, and the like; and the product is especially suitable for being applied in aspects such as strain-type multi-channel high-accuracy online monitoring for the physical quantities of a displacement, a force, a pressure and the like, monitoring for the deformation generated by the stress of a bridge, and measurement and recording for a long-time field pressure.
Description
Technical field
The utility model belongs to sensor dynamometric system technical field, relate to a kind of resistance-strain type duplex high precision dynamometric system, product is applicable to the strain-type duplex high precision on-line monitoring to physical quantitys such as displacement, power, pressure, deformation monitoring and the aspects such as long-time field pressure survey and record that bridge force-bearing produces.
Background technology
Highly sensitive because having advantages of by the mode of resistance strain type sensor dynamometry, volume is little and can under rugged surroundings, use, be widely used in the measurement of the physical quantitys such as displacement, power, pressure, accurate temperature measurement so far.For the sensor that utilizes the metal strain system to do, due to electric wire strain gauge commonly used in linear measurement range, the maximal value that is equivalent to the stressed generation linear strain of material is about 1/1000 left and right, the sensitivity of sensors is 2 left and right, that is to say when when for bridge voltage, being 5V, the stressed voltage signal maximum the caused 5 ÷ 1000 * 2V=10mV that only have an appointment, and the reference voltage of common A/D converter is 3～5V, this just need to have low drift, high-precision amplification circuit that an enlargement factor is 100 times of left and right, so require higher to the modulate circuit of dynamometry circuit.
Again for application scenarios such as bridge deformation, the experiments of mine excavation compressive deformation analog simulation, need to detect simultaneously and reach tens of pressure signals to the hundreds of road, need a computer monitoring multichannel pressure signal, this just requires the front end data acquisition device that can have can simultaneously monitor the multichannel pressure signal.Consider on-the-spot applied environment, it is little that FEP should comprise that the signal transmitting modulate circuit just should possess volume, the simple characteristics of communication interface line.
In addition, in the wild or the medium-term and long-term monitoring of mine but there is no the application scenario of communication link, need a large amount of timesharing measurement data is recorded and preserves, this also requires the data-carrier store with power-down protection of collection equipment for larger capacity.
This area still is not applicable to the dynamometric system of above-mentioned requirements fully at present, the sensor dynameter of in the past continuing to use is corresponding, and also to have the low program code of complex structure, arithmetic speed and response speed of hardware circuit more, need to take the running software resource of CPU and can not realize multi-computer communication and the problem such as high-speed transfer information.
The utility model content
The purpose of this utility model is the problem of prior art existence is solved, provide that a kind of hardware circuit is simple, arithmetic speed and response speed piece, do not take CPU the running software resource, can realize that the resistance-strain type duplex high precision dynamometric system of multi-computer communication and high-speed transfer information, product are specially adapted to strain-type duplex high precision on-line monitoring to physical quantitys such as displacement, power, pressure, deformation monitoring that bridge force-bearing produces and the application of the aspects such as long-time field pressure survey and record.
The technical solution adopted for achieving the above object is such: the resistance-strain type duplex high precision dynamometric system provided has single-chip microcomputer, intelligent stress measurement and A/D change-over circuit, multichannel input signal commutation circuit, strain gauge, AT45DB161 storer and serial CAN change-over circuit, and said single-chip microcomputer employing is built-in with A/D analog input and I
2the 8051F410 single-chip microcomputer of C multi-computer communication interface, the output terminal of strain gauge passes to the stress measurement input end of single-chip microcomputer successively after multichannel input signal commutation circuit and intelligent stress measurement and A/D change-over circuit, the I/O end that the input/output end of AT45DB161 storer is corresponding with single-chip microcomputer connects, and the input/output end of serial CAN change-over circuit connects with the CAN of single-chip microcomputer conversion I/O end.
In above-mentioned resistance-strain type duplex high precision dynamometric system, said intelligent stress measurement and A/D change-over circuit adopt the FS511 analog to digital converter.
In above-mentioned resistance-strain type duplex high precision dynamometric system, said multichannel input signal commutation circuit adopts single 8 passage numeral control simulation electronic switch CD4051.
In above-mentioned resistance-strain type duplex high precision dynamometric system, said serial CAN change-over circuit is the 82C250 change-over circuit, for realizing the conversion of TTL and CAN signal.
In system described in the utility model, the 8051F410 single-chip microcomputer is 8 bit CPUs, its travelling speed is high, maximum frequency of oscillation can reach 50MHz, the machine cycle of carrying out instruction is identical with the concussion cycle, with the product that the similar circuit of more existing documents and materials introductions adopts 8051 series monolithics to make, compares, and uses identical crystal oscillator frequency, arithmetic speed improves 12 times, and there are SPI and I in 8051F410 single-chip microcomputer inside
2the C serial data interface, directly access its special function register and just can carry out Fast Sequential communication, and the data that can automatically complete a byte transmit, and has advantages of that the programming of simplification, minimizing take cpu resource.
The analog to digital converter FS511 adopted in this dynamometric system (intelligent stress measurement and A/D change-over circuit) is a high precision, the low-power consumption analog to digital converter that Taiwan Fu Jing semiconductor company releases, its kernel is the △-∑ ADC of 18 precision, also be integrated with low noise operational amplifier, low-pass filter, digital filter, can, to repeatedly filtering of input signal, realize high-precision A/D conversion.This device adopts spi bus and external microprocessor interface, and by inner control register, the user is configuration transitions speed, polarity, probe power control etc. as required, thereby obtain different A/D inversion frequencies, output speed, A/D precision etc.Adopt spi bus with Microprocessor Interface, the side circuit verification experimental verification of making through the deviser: native system adopts the sampling resolution in this chip 1 hour to reach 18,200,000/, the load sensor that range is 200kg is used in actual measurement, and resolution has reached 1g.Utilize this analog to digital converter chip to omit high-precision signal and amplify and reference voltage circuit, reduced the requirement to the bridge power supply precision.
The AT45DB161 storer adopted in this dynamometric system is a nonvolatile memory with serial SPI interface, there is the data-carrier store of 2M byte its inside, the permission maximum data transmission rate is 30Mbps, internal data store is stored with page mode, have 4096 pages, can place 528 byte datas for every page.During use, note, each quick speed by 30Mbps can only send a page data, and the data of wait 3mS just can be write a page data after preserving.Wipe work Shi An district and carry out the ，Yi Ge district 64K byte is arranged, also can wipe by full wafer, wiping whole chip needs the time of 2 seconds.
Used serial automobile bus CAN agreement in the data transmission of this dynamometric system, serial CAN change-over circuit is selected 82C250, the transmission of digital signals amplitude allowed due to it is the mV level, there is good antijamming capability, it allows maximum 128 control extensions in parallel on a pair of transfer bus, and, in the situation that transmission range reaches 10km, allows transfer rate up to 1Mbps, make system that very high response speed be arranged, can realize remote high-speed transfer information.
The accompanying drawing explanation
Fig. 1 is system architecture diagram of the present utility model.
Embodiment
Below with reference to accompanying drawing, the utility model content is described further, but actual fabrication structure of the present utility model is not limited in following embodiment.
Referring to Fig. 1, resistance-strain type duplex high precision dynamometric system described in the utility model comprises single-chip microcomputer 1, data-carrier store 2, intelligent stress measurement and A/D change-over circuit 3, multichannel input signal commutation circuit 4, strain gauge 5, AT45DB161 storer 6, communications status and supply voltage display 7 thereof, key command input unit 8, serial CAN change-over circuit 9 and voltage-stabilized power supply circuit 10.Single-chip microcomputer 1 adopts and is built-in with A/D analog input and I
2the 8051F410 single-chip microcomputer of C multi-computer communication interface, the output terminal of strain gauge 5 passes to the stress measurement input end of 8051F410 single-chip microcomputer successively after multichannel input signal commutation circuit 4 and intelligent stress measurement and A/D change-over circuit 3, the I/O end that the input/output end of AT45DB161 storer 6 is corresponding with the 8051F410 single-chip microcomputer connects, and the I/O mouth of serial CAN change-over circuit 9 connects with the CAN of 8051F410 single-chip microcomputer conversion I/O mouth.Concrete enforcement in structure, data-carrier store 2 adopts 24C02, intelligence stress measurement and A/D change-over circuit 3 adopt the FS511 analog to digital converter, and multichannel input signal commutation circuit 4 adopts single 8 passage numeral control simulation electronic switch CD4051, and row CAN change-over circuit 9 is the 82C250 change-over circuit.
The basic fundamental main points of this resistance-strain type duplex high precision dynamometric system are the control core for the duplex high precision dynamometry by the 8051F410 single-chip microcomputer, takes full advantage of its internal resource serial SPI and I
2c multi-computer communication interface, use the inner SPI of 8051F410 single-chip microcomputer and serial data storage chip interface, be used for gathering pressure data by the time stored record of setting, use multifunction high-precision, low drift FS511 analog to digital converter and multichannel input signal commutation circuit CD4051, 8051F410 and FS511 are carried out to data communication with the inner SPI data-interface of single-chip microcomputer, switch for the pressure transducer bridge power supply is controlled, carry out amplification and the zeroing of signal with the signal amplifier of FS511 inside, sampling and tonal signal reason hardware circuit have been simplified, saved material, meet the needs that single-chip microcomputer can the Measurement accuracy simulating signal, use the probe power control function of FS511 inside can make this practical technique be applicable to battery powered occasion.Provide communication link with CAN serial physical interface and CAN serial data bus for system, transmission range can be increased to 10km, and allows flank speed to reach 1Mbps, can realize multi-computer communication and high-speed transfer information; Adopt the inner I of single-chip microcomputer
2c software interface and 24C02 nonvolatile memory transmit data, for depositing minute machine information and transducer calibration data.
Claims (4)
1. a resistance-strain type duplex high precision dynamometric system, it is characterized in that: have single-chip microcomputer (1), intelligent stress measurement and A/D change-over circuit (3), multichannel input signal commutation circuit (4), strain gauge (5), AT45DB161 storer (6) and serial CAN change-over circuit (9), said single-chip microcomputer (1) adopts and is built-in with A/D analog input and I
2the 8051F410 single-chip microcomputer of C multi-computer communication interface, the output terminal of strain gauge (5) passes to the stress measurement input end of single-chip microcomputer (1) successively after multichannel input signal commutation circuit (4) and intelligent stress measurement and A/D change-over circuit (3), the I/O end that the input/output end of AT45DB161 storer (6) is corresponding with single-chip microcomputer (1) connects, and the input/output end of serial CAN change-over circuit (9) connects with the CAN conversion I/O end of single-chip microcomputer (1).
2. resistance-strain type duplex high precision dynamometric system according to claim 1, is characterized in that: said intelligent stress measurement and A/D change-over circuit (3) employing FS511 analog to digital converter.
3. resistance-strain type duplex high precision dynamometric system according to claim 1, is characterized in that: the single 8 passages numeral control simulation electronic switch CD4051 of said multichannel input signal commutation circuit (4) employing.
4. resistance-strain type duplex high precision dynamometric system according to claim 1, it is characterized in that: said serial CAN change-over circuit (9) is the 82C250 change-over circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204138505U CN203337299U (en) | 2013-07-11 | 2013-07-11 | Resistance strain-type multi-channel high-accuracy force measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204138505U CN203337299U (en) | 2013-07-11 | 2013-07-11 | Resistance strain-type multi-channel high-accuracy force measurement system |
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| CN203337299U true CN203337299U (en) | 2013-12-11 |
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| CN2013204138505U Expired - Fee Related CN203337299U (en) | 2013-07-11 | 2013-07-11 | Resistance strain-type multi-channel high-accuracy force measurement system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977116A (en) * | 2015-07-10 | 2015-10-14 | 四川奇胜科技有限公司 | Micro-differential voltage transmitter |
| CN105739377A (en) * | 2015-12-26 | 2016-07-06 | 惠州市蓝微新源技术有限公司 | Circuit for transmitting and receiving CAN data information by using common I/O ports of single-chip microcomputer and control method |
| CN107167269A (en) * | 2017-06-01 | 2017-09-15 | 陈畅 | A kind of strain-type electronic dynamometer |
| CN107478375A (en) * | 2017-07-24 | 2017-12-15 | 中国北方车辆研究所 | Bus type multichannel pressure acquisition sensing device |
| CN109855794A (en) * | 2018-12-09 | 2019-06-07 | 北京航天计量测试技术研究所 | A kind of pressure in-line calibration device based on the fusion of multi-communication protocol information |
| CN111504528A (en) * | 2020-05-11 | 2020-08-07 | 苏州博广远智能科技有限公司 | Multi-path force measuring module |
| CN114296370A (en) * | 2021-11-30 | 2022-04-08 | 广西科学院 | Multi-channel magnetic flux sensor measuring device and method based on CAN bus control |
-
2013
- 2013-07-11 CN CN2013204138505U patent/CN203337299U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977116A (en) * | 2015-07-10 | 2015-10-14 | 四川奇胜科技有限公司 | Micro-differential voltage transmitter |
| CN105739377A (en) * | 2015-12-26 | 2016-07-06 | 惠州市蓝微新源技术有限公司 | Circuit for transmitting and receiving CAN data information by using common I/O ports of single-chip microcomputer and control method |
| CN105739377B (en) * | 2015-12-26 | 2017-03-29 | 惠州市蓝微新源技术有限公司 | Using the circuit and control method of the common I/O transmitting-receivings CAN data messages of single-chip microcomputer |
| CN107167269A (en) * | 2017-06-01 | 2017-09-15 | 陈畅 | A kind of strain-type electronic dynamometer |
| CN107478375A (en) * | 2017-07-24 | 2017-12-15 | 中国北方车辆研究所 | Bus type multichannel pressure acquisition sensing device |
| CN109855794A (en) * | 2018-12-09 | 2019-06-07 | 北京航天计量测试技术研究所 | A kind of pressure in-line calibration device based on the fusion of multi-communication protocol information |
| CN111504528A (en) * | 2020-05-11 | 2020-08-07 | 苏州博广远智能科技有限公司 | Multi-path force measuring module |
| CN114296370A (en) * | 2021-11-30 | 2022-04-08 | 广西科学院 | Multi-channel magnetic flux sensor measuring device and method based on CAN bus control |
| CN114296370B (en) * | 2021-11-30 | 2024-05-03 | 广西科学院 | Multi-path magnetic flux sensor measuring device and method based on CAN bus control |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140711 |
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| EXPY | Termination of patent right or utility model |