CN204963880U - Multichannel intelligence becomes send device - Google Patents
Multichannel intelligence becomes send device Download PDFInfo
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- CN204963880U CN204963880U CN201520715893.8U CN201520715893U CN204963880U CN 204963880 U CN204963880 U CN 204963880U CN 201520715893 U CN201520715893 U CN 201520715893U CN 204963880 U CN204963880 U CN 204963880U
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Abstract
The utility model provides a multichannel intelligence becomes send device, includes microcontroller, digital analog converter, HART communication module, switch element, analog/digital device and conversion resistance. The switch element is suitable for select the excitation current under microcontroller's the control or encourage voltage output to sensor, conversion resistance is suitable for the voltage signal of current sample signal conversion for corresponding with the sensor output, analog/digital device is suitable for it is right under microcontroller's the control voltage signal, the voltage sampling signal of sensor output or the difference sampled signal of sensor output that the current sample signal corresponds carry out digital analog conversion to outlet the digital signal extremely microcontroller. The utility model provides a multichannel intelligence becomes send device can match with general sensor and compound multi -parameter sensor on the market.
Description
Technical field
The utility model relates to detection technique field, and particularly device is sent in a kind of multi-channel intelligent change.
Background technology
Transmitter is most important field instrument in industrial stokehold, can be used for the measurement of the many kinds of parameters such as pressure, differential pressure, temperature, liquid level, flow.It is detected process variable by sensor, after conversion, become 4 ~ 20mA standard current signal, or directly exchanges information by digital communication mode and pulpit.Along with improving constantly of industrial process control system automatization level, the maximization of technological process, complicated and computer-controlled application, be proposed new requirements at the higher level to the performance, function, intelligence degree, communication regulations, measuring accuracy, range ratio, long-time stability, various influence amount indexs etc. become into device.The quality of transmitter, is directly connected to stability and the security of whole control system.As from 4 ~ 20mA to the standard in digital fieldbus transition period, highway addressable remote transducer (HART, HighwayAddressableRemoteTransducer) advantage that agreement is maximum same cable can also be utilized to carry out bi-directional digital communication compatible conventional current ring communication while, realize such as revising the functions such as range, maintenance, diagnosis, help improve the quality of production, improve running efficiency of system.
Fig. 1 is the structural representation of traditional transmitter based on HART agreement, and described transmitter comprises analog to digital converter 11, microcontroller 12, digital to analog converter 13 and HART communication module 14.Wherein, described analog to digital converter 11 is suitable for the first simulating signal of sensor collection to be converted to the first digital signal, described microcontroller 12 is suitable for carrying out calculation process to obtain the second digital signal to described first digital signal, described digital to analog converter 13 is suitable for described second digital signal to be converted to the second simulating signal, namely be converted to 4 ~ 20mA electric current, after described HART communication module 14 is suitable for processing described second simulating signal, be sent to remote monitoring center.
Tradition is more single based on the transmitter functions of HART agreement, and only have the single-measurement of the physical quantity such as temperature, pressure, displacement, Electromagnetic Flow, sensor exports faint voltage or current signal.Because the loaded impedance of these sensors, energisation mode, input signal sensitivity and compensation way are all not identical, so transmitter in the past all requires that the different support circuit of design coordinates with corresponding sensor, bring a lot of inconvenience to manufacturing department and purchasing department, also make delivery cycle extend.
Utility model content
To be solved in the utility model is the existing problem single based on the transmitter functions of HART agreement.
For solving the problem, the utility model provides a kind of multi-channel intelligent to become and send device, comprises microcontroller, digital to analog converter and HART communication module, also comprises switch element, analog-digital commutator and transfer resistance; Described switch element is suitable under the control of described microcontroller, select exciting current or driving voltage to export sensor to; Described transfer resistance is suitable for the current sampling signal that sensor exports to be converted to corresponding voltage signal; The voltage sampling signal that described analog-digital commutator is suitable for voltage signal corresponding to described current sampling signal under the control of described microcontroller, sensor exports or the difference sampled signal that sensor exports carry out analog-to-digital conversion process, with output digit signals to described microcontroller.
Optionally, described analog-digital commutator is double-channel analog/digital converter.
Optionally, described analog-digital commutator comprises two single channel analog to digital converters.
Optionally, described switch element is digital switch integrated circuit.
Optionally, described multi-channel intelligent change send device also to comprise the first driving circuit, the second driving circuit, the 3rd driving circuit and four-wheel drive circuit; Described analog-digital commutator receives the in-phase signal in described difference sampled signal by described first driving circuit, described analog-digital commutator receives the inversion signal in described difference sampled signal by described second driving circuit, described analog-digital commutator receives described voltage sampling signal by described 3rd driving circuit, and described analog-digital commutator receives voltage signal corresponding to described current sampling signal by described four-wheel drive circuit.
Compared with prior art, the utility model has the following advantages:
Device is sent in the multi-channel intelligent change that the utility model provides, based on actual demand industrial at present, the analog-digital commutator with multiple Measurement channel is provided, and provide exciting current or driving voltage by the sensor that switch element is different power supply mode, not only remain the output of the simulating signal of the 4mA ~ 20mA of conventional instrument, and by HART protocol realization bi-directional digital communication, the handheld terminal that can meet HART agreement with any or control system interconnect, and can match with sensor general on market and compound multi-parameter sensor.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional transmitter based on HART agreement;
Fig. 2 is that the multi-channel intelligent of a kind of embodiment of the utility model becomes the structural representation sending device;
Fig. 3 is that the multi-channel intelligent of the another kind of embodiment of the utility model becomes the structural representation sending device.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but embodiment of the present utility model is not limited thereto.
Fig. 2 is that the multi-channel intelligent of a kind of embodiment of the utility model becomes the structural representation sending device, and described multi-channel intelligent change send device to comprise switch element 21, analog-digital commutator 22, transfer resistance Rs, microcontroller 23, digital to analog converter 24 and HART communication module 25.
Particularly, described switch element 21 is suitable under the control of described microcontroller 23, select exciting current or driving voltage to export sensor to.Sensor has polytype, and not needing of having provides external drive to work, and then needing of having could work under external drive.For the sensor needing excitation, what have is voltage drive, and what have is then current excitation.In order to meet the excitation requirement of different sensors, described switch element 21 selects different excitations to export corresponding sensor to.Further, described switch element 21 comprises input end, output terminal and control end.The input end of described switch element 21 is suitable for connecting constant current drive and constant voltage excitation, and the control end of described switch element 21 connects described microcontroller 23, and the output terminal of described switch element 21 is suitable for connecting sensor.In the present embodiment, described switch element 21 is digital switch integrated circuit, can be ADG733 integrated circuit.By described microcontroller 23 control figure switch integrated circuit, indirectly open or close input channel, eliminating external signal to analog-to-digital interference, also facilitate multichannel measurement on the other hand.
For dissimilar sensor, some output current sampled signals, some output voltage sampled signals, the then output difference had sampled signal.In order to mate dissimilar sensor, described analog-digital commutator 22 comprises four road sampling channels: wherein two-way sampling channel is used for difference sampled signal V+ and the V-of sampling sensor output, and another two-way sampling channel is respectively used to the voltage sampling signal Vs of sampling sensor output and the current sampling signal Is of sensor output.Described transfer resistance Rs is suitable for the current sampling signal Is that sensor exports to be converted to corresponding voltage signal, namely one end of described transfer resistance Rs connect described analog-digital commutator 22 sampling channel and be suitable for receiving sensor export current sampling signal Is, the other end ground connection of described transfer resistance Rs.Described analog-digital commutator 22 is connected with described microcontroller 23, be suitable for voltage signal corresponding to described current sampling signal Is under the control of described microcontroller 23, the voltage sampling signal Vs of sensor output or the difference sampled signal V+ of sensor output and V-and carry out analog-to-digital conversion process, with output digit signals to described microcontroller 23.It should be noted that, described analog-digital commutator 22 can be double-channel analog/digital converter, and also can comprise two single channel analog to digital converters, the utility model embodiment is not construed as limiting this.Similar in the 26S Proteasome Structure and Function of described microcontroller 23, described digital to analog converter 24 and described HART communication module 25 and prior art, do not repeat them here.
In order to improve measuring accuracy, Fig. 3 is that the multi-channel intelligent of the another kind of embodiment of the utility model becomes the structural representation sending device.In the present embodiment, by increasing driving circuit composition analog filtering and amplify network before each road sampling channel of analog-digital commutator 22, after amplification filtering process is carried out to the sampled signal of sensor output, carry out analog to digital conversion again.Compared with the embodiment that Fig. 2 is corresponding, the multi-channel intelligent change of the present embodiment send device also to comprise the first driving circuit 31, second driving circuit 32, the 3rd driving circuit 33 and four-wheel drive circuit 34.
Particularly, described analog-digital commutator 22 receives the in-phase signal V+ in difference sampled signal by described first driving circuit 31, described analog-digital commutator 22 receives the inversion signal V-in difference sampled signal by described second driving circuit 32, described analog-digital commutator 22 is by described 3rd driving circuit 33 receiver voltage sampled signal Vs, and described analog-digital commutator 22 is by voltage signal corresponding to described four-wheel drive circuit 34 received current sampled signal Vs.Described first driving circuit 31, described second driving circuit 32, described 3rd driving circuit 33 and described four-wheel drive circuit 34 are the analog filtering and the amplification network that comprise amplifier, those skilled in the art know the particular circuit configurations of driving circuit, do not repeat them here.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection domain of the present utility model.
Claims (5)
1. a device is sent in multi-channel intelligent change, comprises microcontroller, digital to analog converter and HART communication module, it is characterized in that, also comprise switch element, analog-digital commutator and transfer resistance;
Described switch element is suitable under the control of described microcontroller, select exciting current or driving voltage to export sensor to;
Described transfer resistance is suitable for the current sampling signal that sensor exports to be converted to corresponding voltage signal;
The voltage sampling signal that described analog-digital commutator is suitable for voltage signal corresponding to described current sampling signal under the control of described microcontroller, sensor exports or the difference sampled signal that sensor exports carry out analog-to-digital conversion process, with output digit signals to described microcontroller.
2. device is sent in multi-channel intelligent change according to claim 1, and it is characterized in that, described analog-digital commutator is double-channel analog/digital converter.
3. device is sent in multi-channel intelligent change according to claim 1, and it is characterized in that, described analog-digital commutator comprises two single channel analog to digital converters.
4. device is sent in multi-channel intelligent change according to claim 1, and it is characterized in that, described switch element is digital switch integrated circuit.
5. device is sent in multi-channel intelligent change according to claim 1, it is characterized in that, also comprises the first driving circuit, the second driving circuit, the 3rd driving circuit and four-wheel drive circuit;
Described analog-digital commutator receives the in-phase signal in described difference sampled signal by described first driving circuit, described analog-digital commutator receives the inversion signal in described difference sampled signal by described second driving circuit, described analog-digital commutator receives described voltage sampling signal by described 3rd driving circuit, and described analog-digital commutator receives voltage signal corresponding to described current sampling signal by described four-wheel drive circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520715893.8U CN204963880U (en) | 2015-09-16 | 2015-09-16 | Multichannel intelligence becomes send device |
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| CN201520715893.8U CN204963880U (en) | 2015-09-16 | 2015-09-16 | Multichannel intelligence becomes send device |
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| CN204963880U true CN204963880U (en) | 2016-01-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980297A (en) * | 2017-05-15 | 2017-07-25 | 北京康斯特仪表科技股份有限公司 | Multi-path pressure data acquisition circuit and multi-path pressure data collecting system |
| CN107247427A (en) * | 2017-07-18 | 2017-10-13 | 霍丁格包尔文(苏州)电子测量技术有限公司 | A kind of high-precision sensor signal transmitting device |
| CN110941205A (en) * | 2018-09-21 | 2020-03-31 | 欧姆龙(上海)有限公司 | Sampling control device, sampling control method and electronic equipment |
| CN115603751A (en) * | 2022-10-13 | 2023-01-13 | 河南翔宇医疗设备股份有限公司（Cn） | Control method, device and medium for ADC (analog to digital converter) acquisition |
| CN117254810A (en) * | 2023-11-17 | 2023-12-19 | 浙江国利信安科技有限公司 | Signal acquisition system |
-
2015
- 2015-09-16 CN CN201520715893.8U patent/CN204963880U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980297A (en) * | 2017-05-15 | 2017-07-25 | 北京康斯特仪表科技股份有限公司 | Multi-path pressure data acquisition circuit and multi-path pressure data collecting system |
| CN106980297B (en) * | 2017-05-15 | 2024-05-14 | 北京康斯特仪表科技股份有限公司 | Multichannel pressure data acquisition circuit and multichannel pressure data acquisition system |
| CN107247427A (en) * | 2017-07-18 | 2017-10-13 | 霍丁格包尔文(苏州)电子测量技术有限公司 | A kind of high-precision sensor signal transmitting device |
| CN110941205A (en) * | 2018-09-21 | 2020-03-31 | 欧姆龙(上海)有限公司 | Sampling control device, sampling control method and electronic equipment |
| CN115603751A (en) * | 2022-10-13 | 2023-01-13 | 河南翔宇医疗设备股份有限公司（Cn） | Control method, device and medium for ADC (analog to digital converter) acquisition |
| CN115603751B (en) * | 2022-10-13 | 2024-03-01 | 河南翔宇医疗设备股份有限公司 | ADC acquisition control method, ADC acquisition control device and medium |
| CN117254810A (en) * | 2023-11-17 | 2023-12-19 | 浙江国利信安科技有限公司 | Signal acquisition system |
| CN117254810B (en) * | 2023-11-17 | 2024-03-05 | 浙江国利信安科技有限公司 | Signal acquisition system |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20170916 |
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| CF01 | Termination of patent right due to non-payment of annual fee |