CN210954161U - 8-channel differential voltage plate - Google Patents
8-channel differential voltage plate Download PDFInfo
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- CN210954161U CN210954161U CN201921785725.0U CN201921785725U CN210954161U CN 210954161 U CN210954161 U CN 210954161U CN 201921785725 U CN201921785725 U CN 201921785725U CN 210954161 U CN210954161 U CN 210954161U
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Abstract
The utility model relates to a voltage acquisition technical field, specific 8 passageway differential electric pressure plate that says so, including power supply circuit, ADC acquisition circuit, MCU master control circuit, LAN and RS485 communication circuit, power isolation circuit and LDO circuit, MCU master control circuit's input is connected to power supply circuit's output, ADC acquisition circuit's output is connected in MCU master control circuit's input, MCU master control circuit's output passes through LAN and RS485 communication circuit and connects the host computer. The utility model discloses mainly realize the function that DC +/-30V voltage measurement handled, can gather the voltage of eight passageways simultaneously, voltage reading calculates that whole to handle the completion through board-mounted MCU master control circuit, voltage signal upper limit voltage to be measured has clear and definite expression, surpasss the peak value, the mistake appears in front end voltage converting circuit, influence MCU master control circuit work, integrated circuit board communication form can divide into LAN mouth control and RS485, follow ethernet communication protocol and Modbus RTU agreement.
Description
Technical Field
The utility model relates to a voltage acquisition technical field specifically is an 8 passageway differential electric pressure plate.
Background
The 8-channel differential voltage acquisition card can be widely applied to the analog quantity acquisition occasions of instruments, adopts an 8-channel simultaneous acquisition mode, is matched with upper computer labview software, can realize multi-channel data acquisition processing, and is particularly applied to optimizing a test flow to realize logic control; the time-sharing detection, the integration test, the system integration and the like of the signal source are realized, the board card can be matched with a case for use, can also be independently powered for use, and is very convenient for the integration and the integration test. The inventor finds out through research that:
1. the existing voltage board card has single channel number and is difficult to deal with the situation of multi-channel measurement;
2. for the field of test and measurement, the requirement on the measurement type of the board card is high, the board card is not only limited to single power supply measurement, but also positive and negative voltages need to be measured, and the board card is required to have high performance and high switching speed.
SUMMERY OF THE UTILITY MODEL
In order to make up for above not enough, the utility model aims to provide an 8 passageway differential voltage board aims at solving traditional voltage board and is difficult to deal with the multichannel and measure, only is limited to single power measurement problem.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an 8 passageway differential electric pressure plate, includes power supply circuit, ADC acquisition circuit, MCU master control circuit, LAN and RS485 communication circuit, power isolation circuit and LDO circuit, MCU master control circuit's input is connected to power supply circuit's output, ADC acquisition circuit's output is connected in MCU master control circuit's input, MCU master control circuit's output passes through LAN and RS485 communication circuit and connects the host computer, power isolation circuit and ADC acquisition circuit and power supply circuit electric connection, LDO circuit and ADC acquisition circuit and power supply circuit electric connection.
As a further optimization of the technical scheme, the power supply device further comprises a power supply interface, and the power supply interface is electrically connected with the power supply circuit.
As further optimization of the technical scheme, eight ADC acquisition circuits are arranged.
As further optimization of the technical scheme, the signal interface is further included, the signal interface is electrically connected with the ADC acquisition circuit, and eight signal interfaces are arranged and correspond to the ADC acquisition circuit one by one.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses mainly realize DC +/-30V voltage measurement's function, can gather the voltage of eight passageways simultaneously, the voltage reads and calculates that whole to handle the completion through board-mounted MCU master control circuit, voltage signal upper limit voltage to be measured has clear and definite expression, exceed the peak value, front end voltage converting circuit appears the mistake, influence MCU master control circuit work, the integrated circuit board communication form can divide into LAN mouth control and RS485, follow ethernet communication protocol and Modbus RTU agreement, if adopt the LAN mouth, can cascade 255 integrated circuit boards of the same type, and the sola integrated circuit board can eight passageways of simultaneous measurement, it is not enough to greatly simplify the measurement passageway, the slow shortcoming of measuring speed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the device comprises a power supply circuit 1, an ADC acquisition circuit 2, an MCU master control circuit 3, a LAN and RS485 communication circuit 4, a power isolation circuit 5, an LDO circuit 6, a power interface 7 and a signal interface 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides an 8 passageway differential electric pressure plate, includes power supply circuit 1, ADC acquisition circuit 2, MCU master control circuit 3, LAN and RS485 communication circuit 4, power isolation circuit 5 and LDO circuit 6.
The output end of the power supply circuit 1 is connected with the input end of the MCU main control circuit 3, the power supply circuit further comprises a power supply interface 7, the power supply interface 7 is electrically connected with the power supply circuit 1, the power supply interface 7 is connected with an external power supply, and a circuit which is a stable and reliable working power supply is provided for the whole board card through the power supply circuit 1.
The output of ADC acquisition circuit 2 is connected in MCU master control circuit 3's input, still includes signal interface 8, and signal interface 8 and ADC acquisition circuit 2 electric connection are connected with external voltage through signal interface 8, through ADC acquisition circuit 2, to reading of external voltage signal, calculation processing. During specific setting, ADC acquisition circuit 2 is equipped with eight, and signal interface 8 is equipped with eight and with ADC acquisition circuit 2 one-to-one, can gather the voltage of eight passageways, adopts the special AD of 24 bits high accuracy, error 5mV, and sampling rate is less than 30 KPS.
The output end of the MCU main control circuit 3 is connected with an upper computer through a LAN and an RS485 communication circuit 4, and follows an Ethernet communication protocol and a Modbus RTU protocol.
The power isolation circuit 5 is electrically connected with the ADC acquisition circuit 2 and the power supply circuit 1, so that the power supply of the measuring end is isolated from the power supply of the control end, and the board card can work normally.
Specifically, the function of DC +/-30V voltage measurement processing is mainly realized, voltages of eight channels can be collected at the same time, voltage reading and calculation are all completed through processing of an onboard MCU main control circuit 3, the upper limit voltage of a voltage signal to be measured is clearly expressed, the voltage signal exceeds a peak value, a front end voltage conversion circuit is in error, the work of the MCU main control circuit 3 is influenced, the communication form of the board card can be divided into LAN port control and RS485, an Ethernet communication protocol and a Modbus RTU protocol are followed, 255 board cards of the same type can be cascaded if the LAN port is adopted, and eight channels can be measured by a single board card at the same time, so that the defects of insufficient measurement channels and low measurement speed are greatly simplified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides an 8 passageway differential electric pressure plate, includes power supply circuit (1), ADC acquisition circuit (2), MCU master control circuit (3), LAN and RS485 communication circuit (4), power isolation circuit (5) and LDO circuit (6), its characterized in that: the input of MCU master control circuit (3) is connected to the output of power supply circuit (1), the output of ADC acquisition circuit (2) is connected in the input of MCU master control circuit (3), the output of MCU master control circuit (3) passes through LAN and RS485 communication circuit (4) and connects the host computer, power isolation circuit (5) and ADC acquisition circuit (2) and power supply circuit (1) electric connection, LDO circuit (6) and ADC acquisition circuit (2) and power supply circuit (1) electric connection.
2. An 8-channel differential voltage plate according to claim 1, wherein: the power supply device is characterized by further comprising a power supply interface (7), wherein the power supply interface (7) is electrically connected with the power supply circuit (1).
3. An 8-channel differential voltage plate according to claim 1, wherein: eight ADC acquisition circuits (2) are arranged.
4. An 8-channel differential voltage plate according to claim 1, wherein: still include signal interface (8), signal interface (8) and ADC acquisition circuit (2) electric connection, signal interface (8) are equipped with eight and with ADC acquisition circuit (2) one-to-one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785725.0U CN210954161U (en) | 2019-10-23 | 2019-10-23 | 8-channel differential voltage plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785725.0U CN210954161U (en) | 2019-10-23 | 2019-10-23 | 8-channel differential voltage plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210954161U true CN210954161U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921785725.0U Active CN210954161U (en) | 2019-10-23 | 2019-10-23 | 8-channel differential voltage plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210954161U (en) |
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2019
- 2019-10-23 CN CN201921785725.0U patent/CN210954161U/en active Active
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