CN204405245U - Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN - Google Patents
Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN Download PDFInfo
- Publication number
- CN204405245U CN204405245U CN201520066470.8U CN201520066470U CN204405245U CN 204405245 U CN204405245 U CN 204405245U CN 201520066470 U CN201520066470 U CN 201520066470U CN 204405245 U CN204405245 U CN 204405245U
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- pressure pickup
- microprocessor
- module
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a kind of differential pressure pickup circuit based on CAN and differential pressure pickup terminal thereof, wherein differential pressure pickup circuit comprises piezoresistive silicon sensor, the output terminal of described piezoresistive silicon sensor is connected with microprocessor by A/D module, the power end of microprocessor is connected with DC/DC modular converter, the input end of DC/DC modular converter connects external power source, the output terminal of microprocessor is connected with CAN module by internal data bus, and CAN module is connected with CAN.The analog signal output of piezoresistive silicon sensor is converted to digital signal and exports by the utility model, and measurement result collection is convenient, strong interference immunity; Utilize CAN to transmit measurement result, improve the reliability of measurement, real-time and measuring accuracy, greatly extend the transmission range of measurement result, reduce measurement cost; Input voltage range is wider, and applicable situation is wide, meets industrial practical application better.
Description
Technical field
The utility model belongs to differential pressure pickup field, particularly a kind of differential pressure pickup circuit based on CAN and differential pressure pickup terminal thereof.
Background technology
The differential pressure pickup that current many producers design and produce, the signal of output mostly is simulating signal, and mostly the simulating signal simultaneously exported is to utilize RS485 bus to transmit.
Because simulating signal itself exists many limitation, as short in transmission range, be subject to undesired signal impact, gather reliability low, later maintenance cost is high; There is many limitation in RS485 bus itself simultaneously, as transfer efficiency is low, system real time is poor, communication reliability is low, later maintenance cost is high, and therefore existing differential pressure pickup measurement result transmission range is short, measurement result precision is low, measurement result reliability is low, measurement real-time is low, it is high to measure cost.
Summary of the invention
When using existing differential pressure pickup to measure pressure reduction, measurement result transmission range is short, measurement result precision is low, measurement result not easily gathers, measurement result reliability is low, measurement real-time is low, it is high to measure cost.The purpose of this utility model is, for above-mentioned the deficiencies in the prior art, provides a kind of differential pressure pickup circuit based on CAN and differential pressure pickup terminal thereof.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
Based on the differential pressure pickup circuit of CAN, comprise piezoresistive silicon sensor, the output terminal of described piezoresistive silicon sensor is connected with microprocessor by A/D module, the power end of microprocessor is connected with DC/DC modular converter, the input end of DC/DC modular converter connects external power source, the output terminal of microprocessor is connected with CAN module by internal data bus, and CAN module is connected with CAN.
By the analog to digital conversion of A/D module, thus the analog signal output of piezoresistive silicon sensor is converted to digital signal output, measurement result collection is convenient, strong interference immunity.Utilize CAN to transmit measurement result, improve the reliability of measurement, real-time and measuring accuracy, greatly extend the transmission range of measurement result, reduce measurement cost.
As a kind of optimal way, described DC/DC modular converter input 10V ~ 30V voltage signal, exports 3.3V voltage signal.
Because input voltage range is wider, thus the utility model applicable situation is wide, meets industrial practical application better.
Further, the input end of described DC/DC modular converter connects external power source by wave filter.
The filter action of the first device after filtering of external power source connects the input end of DC/DC modular converter again, can ensure the reliability of DC/DC modular converter input DC power.
Further, described microprocessor is connected with data storage cell.
Data storage cell is used for storing the pressure difference data that records of differential pressure pickup.
As a kind of optimal way, described data storage cell is EEPROM.
A kind of differential pressure pickup terminal, comprise the described differential pressure pickup circuit based on CAN, also comprise shell, it is sensor installation cavity in shell, described piezoresistive silicon sensor is fixed on the signal-processing board in sensor installation cavity, filling and sealing glue in described sensor installation cavity, the connection terminal of piezoresistive silicon sensor by wire bonds on signal-processing board, A/D module, microprocessor, DC/DC modular converter, CAN module is all positioned on signal-processing board, shell there is the pressure-inducing nozzle contacted with the connection terminal of piezoresistive silicon sensor, described signal-processing board comprises pin, described pin comprises power pins VCC+, power pins GND, data pin CANH, data pin CANL, described pin passes shell.
Pressure-inducing nozzle is used for the pressure difference signal sensed to pass to piezoresistive silicon sensor by connection terminal.Power pins VCC+ connects external power source, power pins GND ground connection, and data pin CANH and data pin CANL connects CAN.
As a kind of optimal way, power pins VCC+, power pins GND, data pin CANH, data pin CANL are arranged in a linear and spacing is 2.54mm.
Further, the position correspondence that on shell, pin passes is carved with pin mark.
Further, the input end of described DC/DC modular converter connects external power source by wave filter, and wave filter is positioned on signal-processing board.
Further, described microprocessor is connected with data storage cell, and data storage cell is positioned on signal-processing board.
Compared with prior art, the analog signal output of piezoresistive silicon sensor is converted to digital signal and exports by the utility model, and measurement result collection is convenient, strong interference immunity; Utilize CAN to transmit measurement result, improve the reliability of measurement, real-time and measuring accuracy, greatly extend the transmission range of measurement result, reduce measurement cost; Input voltage range is wider, and applicable situation is wide, meets industrial practical application better.
Accompanying drawing explanation
Fig. 1 is the circuit structure block scheme of the utility model based on differential pressure pickup circuit one embodiment of CAN.
Fig. 2 is the scheme of installation of the utility model differential pressure pickup terminal one embodiment.
Wherein, 1 is wave filter, and 2 is DC/DC modular converter, and 3 is piezoresistive silicon sensor, and 4 is A/D module, 5 is microprocessor, and 6 is EEPROM, and 7 is CAN module, and 8 is CAN, and 9 is connection terminal, 10 is signal-processing board, and 11 is pin, and 12 is pin mark, and 13 is pressure-inducing nozzle, and 14 is shell.
Embodiment
As shown in Figure 1, the utility model comprises piezoresistive silicon sensor 3 based on an embodiment of the differential pressure pickup circuit of CAN, the output terminal of described piezoresistive silicon sensor 3 is connected with microprocessor 5 by A/D module 4, the power end of microprocessor 5 is connected with DC/DC modular converter 2, the input end of DC/DC modular converter 2 connects external power source by wave filter 1, the output terminal of microprocessor 5 is connected with CAN module 7 by internal data bus, and CAN module 7 is connected with CAN 8.
Described DC/DC modular converter 2 inputs 10V ~ 30V voltage signal, exports 3.3V voltage signal.
Described microprocessor 5 is connected with EEPROM6.
As shown in Figure 2, one embodiment of the utility model differential pressure pickup terminal comprises the differential pressure pickup circuit based on CAN in Fig. 1, also comprise shell 14, it is sensor installation cavity in shell 14, described piezoresistive silicon sensor 3 is fixed on the signal-processing board 10 in sensor installation cavity, filling and sealing glue in described sensor installation cavity, the connection terminal 9 of piezoresistive silicon sensor 3 by wire bonds on signal-processing board 10, A/D module 4, microprocessor 5, DC/DC modular converter 2, CAN module 7, wave filter 1, EEPROM6 is positioned on signal-processing board 10, shell 14 there is the pressure-inducing nozzle 13 contacted with the connection terminal 9 of piezoresistive silicon sensor 3, described signal-processing board 10 comprises pin 11, described pin 11 comprises power pins VCC+, power pins GND, data pin CANH, data pin CANL, described pin 11 passes shell 14.
Power pins VCC+, power pins GND, data pin CANH, data pin CANL are arranged in a linear and spacing is 2.54mm.
The position correspondence that on shell 14, pin 11 passes is carved with pin mark 12.
Claims (10)
1. based on the differential pressure pickup circuit of CAN, comprise piezoresistive silicon sensor (3), it is characterized in that, the output terminal of described piezoresistive silicon sensor (3) is connected with microprocessor (5) by A/D module (4), the power end of microprocessor (5) is connected with DC/DC modular converter (2), the input end of DC/DC modular converter (2) connects external power source, the output terminal of microprocessor (5) is connected with CAN module (7) by internal data bus, and CAN module (7) is connected with CAN (8).
2. as claimed in claim 1 based on the differential pressure pickup circuit of CAN, it is characterized in that, described DC/DC modular converter (2) input 10V ~ 30V voltage signal, exports 3.3V voltage signal.
3. as claimed in claim 1 based on the differential pressure pickup circuit of CAN, it is characterized in that, the input end of described DC/DC modular converter (2) connects external power source by wave filter (1).
4., as claimed in claim 1 based on the differential pressure pickup circuit of CAN, it is characterized in that, described microprocessor (5) is connected with data storage cell.
5. as claimed in claim 4 based on the differential pressure pickup circuit of CAN, it is characterized in that, described data storage cell is EEPROM(6).
6. a differential pressure pickup terminal, it is characterized in that, comprise as claimed in claim 1 based on the differential pressure pickup circuit of CAN, also comprise shell (14), sensor installation cavity in shell (14), described piezoresistive silicon sensor (3) is fixed on the signal-processing board (10) in sensor installation cavity, filling and sealing glue in described sensor installation cavity, the connection terminal (9) of piezoresistive silicon sensor (3) by wire bonds on signal-processing board (10), A/D module (4), microprocessor (5), DC/DC modular converter (2), CAN module (7) is all positioned on signal-processing board (10), shell (14) there is the pressure-inducing nozzle (13) contacted with the connection terminal of piezoresistive silicon sensor (3) (9), described signal-processing board (10) comprises pin (11), described pin (11) comprises power pins VCC+, power pins GND, data pin CANH, data pin CANL, described pin (11) passes shell (14).
7. differential pressure pickup terminal as claimed in claim 6, it is characterized in that, power pins VCC+, power pins GND, data pin CANH, data pin CANL are arranged in a linear and spacing is 2.54mm.
8. differential pressure pickup terminal as claimed in claim 6, is characterized in that, the position correspondence that the upper pin (11) of shell (14) passes is carved with pin mark (12).
9. differential pressure pickup terminal as claimed in claim 6, is characterized in that, the input end of described DC/DC modular converter (2) connects external power source by wave filter (1), and wave filter (1) is positioned on signal-processing board (10).
10. differential pressure pickup terminal as claimed in claim 6, it is characterized in that, described microprocessor (5) is connected with data storage cell, and data storage cell is positioned on signal-processing board (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520066470.8U CN204405245U (en) | 2015-01-30 | 2015-01-30 | Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520066470.8U CN204405245U (en) | 2015-01-30 | 2015-01-30 | Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204405245U true CN204405245U (en) | 2015-06-17 |
Family
ID=53429095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520066470.8U Active CN204405245U (en) | 2015-01-30 | 2015-01-30 | Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204405245U (en) |
-
2015
- 2015-01-30 CN CN201520066470.8U patent/CN204405245U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201918010U (en) | Voltage-current collecting and transmitting device for high-voltage system | |
| CN102692883B (en) | An analog input circuit for engineering-machinery-dedicated controller | |
| CN204405245U (en) | Based on differential pressure pickup circuit and the differential pressure pickup terminal thereof of CAN | |
| CN203812008U (en) | Analog signal collector | |
| CN102551881B (en) | Output power monitoring circuit of high frequency electrotome | |
| CN204241102U (en) | Based on the transformer vibration monitoring verification platform of DDS | |
| CN202886003U (en) | Intelligent multichannel temperature collection instrument | |
| CN105548786A (en) | Electric energy quality monitoring device | |
| CN202956210U (en) | Temperature sensor circuit structure based on single wire connection | |
| CN205787055U (en) | A kind of electric voltage exception fluctuation monitoring and recording instrument | |
| CN204206213U (en) | A kind of HART communication modem that ring current is provided | |
| CN201697712U (en) | Vibration sensor | |
| CN203396405U (en) | Frequency-isolating linear-conversion current device | |
| CN202421267U (en) | Digital multimeter based on wifi wireless transmission | |
| CN204807316U (en) | Signal conversion equipment of engine test usefulness | |
| CN203883811U (en) | Analog-to-digital converting module of transformer station gas concentration detecting system | |
| CN203705058U (en) | Temperature signal acquisition device | |
| CN204241572U (en) | High-precision electric cable dielectric loss measurement test sampling apparatus | |
| CN203224562U (en) | Wireless Hall-current sensing transmitter | |
| CN204881682U (en) | Enclosed bus connects temperature monitoring system | |
| CN203337724U (en) | H half-bridge IPM module bus voltage detection circuit | |
| CN204422072U (en) | Based on the infrared temperature sensor of STM32 | |
| CN202648844U (en) | Communication type tonnage detection module | |
| CN202149816U (en) | Engine low temperature acquisition circuit | |
| CN202916986U (en) | MBUS circuit adopting separated element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160520 Address after: Three Hunan province Changsha Fenglin Road 410205 No. 217 Patentee after: HUNAN AEROSPACE YUANWANG TECHNOLOGY CO., LTD. Address before: Three Hunan province Changsha Fenglin Road 410205 No. 217 Patentee before: Hunan Aerospace Electromechanical Equipment and Special Material Institute |