CN208060084U - A kind of four road vacuum pressure measurement modules - Google Patents
A kind of four road vacuum pressure measurement modules Download PDFInfo
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- CN208060084U CN208060084U CN201721737989.XU CN201721737989U CN208060084U CN 208060084 U CN208060084 U CN 208060084U CN 201721737989 U CN201721737989 U CN 201721737989U CN 208060084 U CN208060084 U CN 208060084U
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- module
- vacuum pressure
- resistive module
- capacitance
- mcu
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Abstract
The utility model is related to a kind of four road vacuum pressure measurement modules, it includes module bodies, 8 select an analog switch and RJ45 cable interfaces, the module bodies right lower quadrant is provided with RJ45 cable interfaces, the RJ45 cable interfaces are connected with resistive module A, the resistive module A is connected with 8 and selects an analog switch and resistive module, described 8 select an analog switch to be connected with AD conversion, the resistive module is connected with MCU, the MCU is connected with resistive module, the resistive module is connected with TVS modules, the resistive module B is connected with connecting terminal, the connecting terminal is connected with power management chip, the power management chip is connected with capacitance C, the capacitance C is connected with inductance, the inductance connection has capacitance A, the capacitance A is connected with AD conversion；Therefore, the utility model has the advantages that high certainty of measurement, stability are good and transmission speed is fast.
Description
Technical field
The utility model belongs to pressure measurement technology field, and in particular to a kind of four road vacuum pressure measurement modules.
Background technology
The vacuum oven of lithium battery production equipment need to measure the vacuum pressure value in vacuum chamber in real time, to produce process control
Technical parameter is provided.Vacuum pressure, which measures, generally uses vacuum pressure sensor, output voltage signal to measure pressure sensor
Voltage value is converted to vacuum pressure value by logarithm or power operation.One equipment often has 3 or 4 vacuum chambers, because needing
The voltage RJ45 cable interfaces on no less than 4 tunnels can be measured simultaneously.Near normal pressure, the voltage of 1mV may result in the pressure of thousands of Pa
Fluctuation, so pressure RJ45 cable interfaces require have higher measurement accuracy and stability；Therefore, a kind of measurement accuracy is developed
Height, stability is good and tetra- road vacuum pressure RJ45 cable interfaces of transmission speed Kuai have a very important significance.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of high certainty of measurement, stability
Good and tetra- road vacuum pressure RJ45 cable interfaces of transmission speed Kuai.
What the purpose of this utility model was realized in：A kind of four road vacuum pressure measurement modules, it include module bodies,
8 select an analog switch and RJ45 cable interfaces, it is characterised in that：The module bodies right lower quadrant is provided with RJ45 cable interfaces,
The RJ45 cable interfaces are connected with resistive module A, and the resistive module A is connected with 8 and selects an analog switch and resistive module, institute
Stating 8 selects an analog switch to be connected with AD conversion, and the resistive module is connected with MCU, and the MCU is connected with resistive module, described
Resistive module is connected with TVS modules, and the resistive module B is connected with connecting terminal, and the connecting terminal is connected with power management
Chip, the power management chip are connected with capacitance C, and the capacitance C is connected with inductance, and the inductance connection has capacitance A, described
Capacitance A is connected with AD conversion.
The vacuum pressure that the RJ45 cable interfaces are applied to vacuum oven measures, and can measure 4 road DC voltages simultaneously, adopt
With RJ45 cable seat input interfaces, the output interface of corresponding vacuum pressure sensor, direct cable connection, which can also be pressure
Force snesor provides power supply.
Described 8 select voltage input signal in an analog switch to access buffer circuit, input impedance are improved, after electric resistance partial pressure
Four road voltage signals access 24 high-precision As/D conversion chips, and voltage signal is converted to digital signal by SPI mouthfuls and sent by chip
Enter MCU, MCU is high speed ARM7 chips.
The beneficial effects of the utility model：RJ45 cable interfaces in the utility model：The module application is in vacuum oven
Vacuum pressure measures, and can measure 4 road DC voltages simultaneously, using RJ45 cable seat input interfaces, corresponding vacuum pressure sensor
Output interface, the connection of direct cable is simple and fast.The interface can also provide power supply for pressure sensor；Voltage acquisition：Voltage
Input signal accesses buffer circuit, improves input impedance, and four road voltage signals access 24 high-precision A/D and turn after electric resistance partial pressure
Chip is changed, voltage signal is converted to digital signal by SPI mouthfuls and is sent into MCU by chip, and MCU is high speed ARM7 chips, can be light
Carry out logarithm and power operation.The digital signal of voltage value is represented according to the input characteristics of different sensors, substitutes into different calculating
Formula, you can calculate the corresponding vacuum pressure value in each channel；Signal transmission：MCU can lead to calculated vacuum pressure value
It crosses RS485 and is sent to host；Therefore, the utility model has the advantages that high certainty of measurement, stability are good and transmission speed is fast.
Description of the drawings
Fig. 1 is a kind of front view of four roads vacuum pressure measurement module of the utility model.
In figure：1, module bodies 2, resistive module A 3, RJ45 cable interfaces 4,8 select an analog switch 5, MCU
6, AD conversion 7, capacitance A 8, inductance 9, capacitance C 10, power management chip 11, capacitance D 12, connecting terminal
13, TVS modules 14, resistive module 15, resistive module.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1, a kind of four road vacuum pressure measurement modules, it includes module bodies, 8 selects an analog switch and RJ45
Cable interface, it is characterised in that：The module bodies right lower quadrant is provided with RJ45 cable interfaces, the RJ45 cable interfaces connection
There are resistive module A, the resistive module A to be connected with 8 and select an analog switch and resistive module, described 8 select an analog switch to connect
There are AD conversion, the resistive module to be connected with MCU, the MCU is connected with resistive module, and the resistive module is connected with TVS moulds
Block, the resistive module B are connected with connecting terminal, and the connecting terminal is connected with power management chip, the power management core
Piece is connected with capacitance C, the capacitance C and is connected with inductance, and the inductance connection has capacitance A, the capacitance A to be connected with AD conversion.
The utility model circuit describes：Power circuit：13-35VDC power supplies, power circuit can be used to provide two for this module
Road voltage, exports 5V all the way（VCC）Voltage provides voltage for circuit board, exports 12V all the way, powers for vacuum pressure sensor；
Voltage collection circuit：Four road voltage signals are inputted through RJ45 cable seats, and per road, there are one pull down resistors, access by rail-to-rail fortune
The buffer circuit of composition is put, output signal is followed by high A/D conversion chips through electric resistance partial pressure, and the SPI mouths of rotation chip are used for connecting
MCU；RS485 circuits：Using high-performance RS485 driving chips, the ports USART for receiving and dispatching I/O port and MCU connect energy, and output is connected to
RS485 buses, are used for and host communication, transmit vacuum pressure value.The limited leakage resistance of RS485 interface strings, and be connected to TVS and instantaneously press down
Diode pair circuit processed is protected；MCU circuits：SPI communications, while its USART are carried out using high speed ARM7 chips and A/D
Mouth is connected with RS485 driving chips, realizes data transmission；Therefore, the utility model has high certainty of measurement, stability good and passes
Defeated fireballing advantage.
Embodiment 2
As shown in Figure 1, a kind of four road vacuum pressure measurement modules, it includes module bodies, 8 selects an analog switch and RJ45
Cable interface, the module bodies right lower quadrant are provided with RJ45 cable interfaces, and the RJ45 cable interfaces are connected with resistive module
A, the resistive module A are connected with 8 and select an analog switch and resistive module, and described 8 select an analog switch to be connected with AD conversion A,
The resistive module is connected with MCU, and the MCU is connected with resistive module, and the resistive module is connected with AD conversion B, the electricity
Resistance module B is connected with connecting terminal, and the connecting terminal is connected with power management chip, and the power management chip is connected with electricity
Hold C, the capacitance C is connected with inductance, and the inductance connection has capacitance A, the capacitance A to be connected with AD conversion A；The RJ45 nets
The vacuum pressure that line interface is applied to vacuum oven measures, and can measure 4 road DC voltages simultaneously, is connect using the input of RJ45 cable seats
Mouthful, the output interface of corresponding vacuum pressure sensor, direct cable connects, which can also provide power supply for pressure sensor；
Described 8 select voltage input signal in an analog switch to access buffer circuit, improve input impedance, the four road voltage after electric resistance partial pressure
Signal accesses 24 high-precision As/D conversion chips, and voltage signal is converted to digital signal by SPI mouthfuls and is sent into MCU by chip,
MCU is high speed ARM7 chips.
Specific implementation mode is unrestricted to the further explanation of the utility model, is come to those of ordinary skill in the art
It says and further transformation is done to structure in the case where not departing from the utility model in essence content, and all these transformation should all belong to
The protection domain of the appended claims for the utility model.
Claims (3)
1. a kind of four road vacuum pressure measurement modules, it includes module bodies, 8 selects an analog switch and RJ45 cable interfaces,
It is characterized in that：The module bodies right lower quadrant is provided with RJ45 cable interfaces, and the RJ45 cable interfaces are connected with resistive module
A, the resistive module A are connected with 8 and select an analog switch and resistive module, and described 8 select an analog switch to be connected with AD conversion, institute
It states resistive module and is connected with MCU, the MCU is connected with resistive module, and the resistive module is connected with TVS modules, the resistance
Module B is connected with connecting terminal, and the connecting terminal is connected with power management chip, and the power management chip is connected with capacitance
C, the capacitance C are connected with inductance, and the inductance connection has capacitance A, the capacitance A to be connected with AD conversion.
2. a kind of four roads vacuum pressure measurement module according to claim 1, it is characterised in that：The RJ45 cable interfaces
Vacuum pressure applied to vacuum oven measures, and can measure 4 road DC voltages simultaneously, right using RJ45 cable seat input interfaces
Answer the output interface of vacuum pressure sensor, direct cable connection, the interface can also provide power supply for pressure sensor.
3. a kind of four roads vacuum pressure measurement module according to claim 1, it is characterised in that：Described 8 select a simulation to open
Central Shanxi Plain voltage input signal accesses buffer circuit, improves input impedance, and four road voltage signals access 24 height after electric resistance partial pressure
Voltage signal is converted to digital signal by SPI mouthfuls and is sent into MCU by precision A/D conversion chips, chip, and MCU is high speed ARM7 cores
Piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737989.XU CN208060084U (en) | 2017-12-14 | 2017-12-14 | A kind of four road vacuum pressure measurement modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737989.XU CN208060084U (en) | 2017-12-14 | 2017-12-14 | A kind of four road vacuum pressure measurement modules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208060084U true CN208060084U (en) | 2018-11-06 |
Family
ID=63997749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721737989.XU Expired - Fee Related CN208060084U (en) | 2017-12-14 | 2017-12-14 | A kind of four road vacuum pressure measurement modules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208060084U (en) |
-
2017
- 2017-12-14 CN CN201721737989.XU patent/CN208060084U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 Termination date: 20211214 |