CN206618530U - A kind of core body compensating test switching circuit plate - Google Patents
A kind of core body compensating test switching circuit plate Download PDFInfo
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- CN206618530U CN206618530U CN201720317757.2U CN201720317757U CN206618530U CN 206618530 U CN206618530 U CN 206618530U CN 201720317757 U CN201720317757 U CN 201720317757U CN 206618530 U CN206618530 U CN 206618530U
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- circuit module
- core body
- relay
- compensating test
- digital communication
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Abstract
The utility model is related to a kind of core body compensating test switching circuit plate, belong to sensor testing techniques field, the circuit board includes host computer, Digital communication circuit module, MCU control circuit module, shift drive circuit module and relay circuit module, the host computer is connected with Digital communication circuit module, Digital communication circuit module is connected with MCU control circuit module, MCU control circuit module is connected with displacement drive circuit module, displacement drive circuit module is connected with relay circuit module, the relay circuit module is provided with several relays, circuit board of the present utility model can meet multichannel core body compensating test requirement, improve core body compensating test efficiency.
Description
Technical field
The utility model is related to a kind of core body compensating test switching circuit plate, belongs to sensor testing techniques field.
Background technology
Core body is that pressure-sensitive chip is encapsulated in stainless steel cavity, and impressed pressure is squeezed by the silicone oil of diaphragm, inner sealing
Pressure-sensitive chip is pressed, ambient pressure is changed into the analog signal that can be perceived, while external substance is not directly placed on pressure-sensitive
Chip, therefore the product can apply to various occasions, including severe Korrosionsmedium environment.
Core body compensating test needs to draw four road signals, respectively power supply Vin, ground connection GND, output Vout+ and output
Vout-.Core body is compensated frequently with constant current source power supply, because every core body is individually tested, and the signal transmission between core body can not be mutual
Interference, so the inefficiency of core body compensating test.
Utility model content
Technical problem to be solved in the utility model is a kind of core body compensating test switching circuit plate of efficiency high of offer.
The utility model is that the technical scheme that solution above-mentioned technical problem is proposed is：A kind of core body compensating test switching electricity
Road plate, including host computer, Digital communication circuit module, MCU control circuit module, displacement drive circuit module and relay circuit
Module, the host computer is connected with Digital communication circuit module, and Digital communication circuit module is connected with MCU control circuit module,
MCU control circuit module is connected with displacement drive circuit module, and displacement drive circuit module is connected with relay circuit module, institute
Relay circuit module is stated provided with several relays.
Above-mentioned technical proposal is improved to：Described Digital communication circuit module is used to pass to MCU control circuit module
Defeated instruction, Digital communication circuit module uses RS-485 serial communications, and uses SN75LBC184 interface chips.
The MCU control circuit module is used to give displacement drive module transmission instruction, and MCU control circuit module is used
At89c2052 singlechip chips.The peripheral circuit of MCU control circuit module includes X5054 watch dog monitorings circuit and 12MHz is brilliant
Shake device.
The displacement drive circuit module includes shift register and relay driver, and the shift register is used to control
Relay driver processed, relay driver is used to provide low and high level to the input of relay.
The shift register uses SN74HC164 chips, and relay driver uses ULN2003 circuits.
The relay model G6H-2-5VDC, for being connected with core body, and is used as the derailing switch of core body transmission signal.
The beneficial effects of the utility model are：
Due to provided with several relays, multiple core bodys can be connected simultaneously, the transmission control to multichannel core body signal is realized
System, meets multichannel core body compensating test requirement, improves core body compensating test efficiency；Simultaneously because what relay driver was selected
ULN2003, it is a 7 road Nverter circuits, and when input is high level, its output end is low level, similarly on the contrary,
Relay selects G6H-2-5VDC, it be an open type it is double open it is double close structure, when input is high level, device inside is closed
Close, similarly on the contrary, so the signal transmission non-interference between core body can be realized.
Brief description of the drawings
Fig. 1 is the structured flowchart of the utility model core body compensating test switching circuit plate.
Fig. 2 is the operation principle schematic diagram of the utility model core body compensating test switching circuit plate.
Embodiment
Below in conjunction with the accompanying drawings and one embodiment is further described to the utility model：
As depicted in figs. 1 and 2, a kind of core body compensating test switching circuit plate of the present embodiment, including host computer, numeral are logical
Interrogate circuit module, MCU control circuit module, displacement drive circuit module and relay circuit module, host computer and digital communication
Circuit module is connected, and Digital communication circuit module is connected with MCU control circuit module, and MCU control circuit module drives with displacement
Circuit module connect, displacement drive circuit module be connected with relay circuit module, relay circuit module be provided with several after
Electrical equipment, the present embodiment repeat circuit is provided with 80.
Digital communication circuit module uses RS-485 serial communications, from SN75LBC184 interface chips, is for connection to
Host computer and MCU instruction transmission.
MCU control circuit module uses at89c2052 singlechip chips, as a kind of control process unit, for shifting
Position drive module transmission instruction, its peripheral circuit includes X5054 watch dog monitorings circuit and 12MHz crystal oscillator devices.
Shifting drive circuit includes shift register and relay driver, and shift register selects SN74HC164 chips,
It is 8 bit shift registers, and that relay driver is selected is ULN2003, and it is a 7 road Nverter circuits, that is, is worked as
Its output end is low level when input is high level, similarly conversely.
A kind of core body compensating test switching circuit plate described in the utility model, relay selects G6H-2-5VDC, and it is
One open type is double open it is double close structure, when input is high level, device inside closure, similarly conversely.
The core body compensating test switching circuit plate of the present embodiment can meet 40 core body compensating tests, substantially increase core body
Compensating test efficiency.
Core body compensating test switching circuit plate of the present utility model is not limited to the various embodiments described above, all use equivalent substitutions
The technical scheme that mode is obtained is all fallen within the claimed scope of the utility model.
Claims (6)
1. a kind of core body compensating test switching circuit plate, it is characterised in that：Including host computer, Digital communication circuit module, MCU controls
Circuit module processed, displacement drive circuit module and relay circuit module, the host computer are connected with Digital communication circuit module,
Digital communication circuit module is connected with MCU control circuit module, and MCU control circuit module is connected with displacement drive circuit module,
Displacement drive circuit module is connected with relay circuit module, and the relay circuit module is provided with several relays.
2. core body compensating test switching circuit plate according to claim 1, it is characterised in that：Described Digital communication circuit mould
Block is used to instruct to MCU control circuit module transfer, and Digital communication circuit module uses RS-485 serial communications, and uses
SN75LBC184 interface chips.
3. core body compensating test switching circuit plate according to claim 2, it is characterised in that：The MCU control circuit module
For giving displacement drive module transmission instruction, MCU control circuit module uses at89c2052 singlechip chips.
4. core body compensating test switching circuit plate according to claim 3, it is characterised in that：The displacement drive circuit module
Including shift register and relay driver, the shift register is used for control relay driver, relay driver
Low and high level is provided for the input to relay.
5. core body compensating test switching circuit plate according to claim 4, it is characterised in that：The shift register is used
SN74HC164 chips, relay driver uses ULN2003 circuits.
6. core body compensating test switching circuit plate according to claim 5, it is characterised in that：The relay model G6H-
2-5VDC, for being connected with core body, and is used as the derailing switch of core body transmission signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720317757.2U CN206618530U (en) | 2017-03-29 | 2017-03-29 | A kind of core body compensating test switching circuit plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720317757.2U CN206618530U (en) | 2017-03-29 | 2017-03-29 | A kind of core body compensating test switching circuit plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206618530U true CN206618530U (en) | 2017-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720317757.2U Active CN206618530U (en) | 2017-03-29 | 2017-03-29 | A kind of core body compensating test switching circuit plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN206618530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111045967A (en) * | 2019-10-12 | 2020-04-21 | 深圳市康必达控制技术有限公司 | Automatic test switching circuit for serial port of communication manager |
-
2017
- 2017-03-29 CN CN201720317757.2U patent/CN206618530U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111045967A (en) * | 2019-10-12 | 2020-04-21 | 深圳市康必达控制技术有限公司 | Automatic test switching circuit for serial port of communication manager |
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