CN211236009U

CN211236009U - Analog quantity acquisition board applied to large-current sensor

Info

Publication number: CN211236009U
Application number: CN201921592263.0U
Authority: CN
Inventors: 严月华; 兰皓; 范子春; 周汉杰
Original assignee: Shanghai Jiarui Automation Testing Technology Co ltd
Current assignee: Shanghai Jiarui Automation Testing Technology Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-08-11
Anticipated expiration: 2029-09-24

Abstract

The embodiment of the application discloses an analog quantity acquisition board applied to a large-current sensor, which comprises an acquisition board, wherein the acquisition board comprises a 24V isolation power supply, a 24V-to-15V isolation power supply, a 24V-to-5V isolation power supply, a clamping circuit, an AD637, a conditioning circuit, an MCU (microprogrammed control unit) and a CAN (controller area network), and the clamping circuit comprises a first clamping circuit and a second clamping circuit; the conditioning circuit includes a first conditioning circuit, a second conditioning circuit, and a third conditioning circuit. A power supply module applied to a large-current sensor analog quantity acquisition board integrates all elements required for acquiring analog quantity signals; the AD637 integral chip is used, so that the problem that the original analog quantity is difficult to collect is perfectly solved; the functions of data acquisition, conversion, analysis and uploading are integrated, so that the cost is low and the operation is convenient; the collecting plate uses STM37F373 multichannel 16-bit SDADC, has high resolution, designs direct current signal collecting channel, alternating current signal collecting channel, and voltage signal collecting channel, satisfies the demand of most operating modes.

Description

Analog quantity acquisition board applied to large-current sensor

Technical Field

The application relates to the field of large-current collection of new energy manufacturing and new energy testing, in particular to a large-current sensor analog quantity collection plate.

Background

The existing large-current sensor acquisition technology is that a sensor outputs large current, and analog quantity is converted into digital quantity through a high-speed data acquisition card or a universal meter and then is transmitted to an upper computer for analysis and calculation.

The high-speed analog acquisition card is adopted to support multi-channel input, but the cost is extremely high; the multimeter is low in cost, only supports single-channel input and is inconvenient to use.

The conventional method relates to the cooperative work of a sensor, a high-speed data acquisition card and a single chip microcomputer, and is extremely inconvenient for data acquisition of a high-current sensor.

At present, the data transmission of large current generally does not use a CAN bus, but transmits through analog quantity, and the method has the defect that analog quantity signals need to be collected and converted firstly and then transmitted to an upper computer for analysis. This is also extremely inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem, this application aim at, along with the development of science and technology, heavy current sensor uses more and more extensively and generally, the utility model discloses aim at developing one kind with heavy current data conversion, collection, analysis, upload collection in the circuit board of an organic whole, with this process simplification of analog quantity from gathering to uploading, make its cost lower use more convenient.

The analog quantity acquisition board comprises an acquisition board, wherein the acquisition board comprises a 24V isolation power supply, a 24V-to-15V isolation power supply, a 24V-to-5V isolation power supply, a clamp circuit, an AD637, a conditioning circuit, an MCU (microprogrammed control unit) and a CAN (controller area network);

the clamping circuit comprises a first clamping circuit and a second clamping circuit;

the conditioning circuit comprises a first conditioning circuit, a second conditioning circuit and a third conditioning circuit;

the 24V isolation power supply is used for supplying power to the VDC sensor;

the 24V-to-15V isolation power supply is used for supplying power to IDC and IAC sensors;

the 24V-to-5V isolation power supply is used for supplying power for VREF, operational amplifier, VCC and VDD;

the clamping circuit is used for preventing the signal overvoltage from damaging the element;

the AD637 is used for integrating the signal to output an RMS value;

the conditioning circuit is used for filtering signals;

the MCU is used for converting the analog quantity into the digital quantity;

and the CAN is used for reporting the data processed by the MCU.

Preferably, the first clamping circuit, the AD637, the first conditioning circuit and the MCU form a signal acquisition and processing module.

Preferably, the MCU and the CAN are combined to form a data transmission module.

Preferably, the acquisition plate is SDADC using STM37F373 multichannel 16.

Preferably, the collecting plate comprises a direct current signal collecting channel, an alternating current signal collecting channel and a voltage signal collecting channel.

The application provides a pair of be applied to heavy current sensor analog quantity and gather board possesses following beneficial effect:

1. the power supply module integrates all elements required for collecting analog quantity signals;

2. the AD637 integral chip is used, so that the problem that the original analog quantity is difficult to collect is perfectly solved;

3. the functions of data acquisition, conversion, analysis and uploading are integrated, so that the cost is low and the operation is convenient;

4. the collecting plate uses STM37F373 multichannel 16-bit SDADC, has high resolution, designs direct current signal collecting channel, alternating current signal collecting channel, and voltage signal collecting channel, satisfies the demand of most operating modes.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a general view of the circuit of the present invention;

FIG. 2 is a schematic diagram of the clamping circuit of the present invention;

fig. 3 is a diagram of the conditioning circuit of the present invention.

The attached drawings are as follows: 1. a 24V isolated power supply; 2. an isolated power supply for converting 24V into 15V; 3. converting 24V to 5V to isolate the power supply; 4. a first clamping circuit; 5. AD 637; 6. a first conditioning circuit; 7. a second conditioning circuit; 8. MCU; 9. CAN; 10. a second clamping circuit; 11. and a third conditioning circuit.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1-3, an analog acquisition board applied to a large current sensor includes an acquisition board, which includes a 24V isolation power supply 1, a 24V to 15V isolation power supply 2, a 24V to 5V isolation power supply 3, a clamp circuit, an AD 6375, a conditioning circuit, an MCU 8 and a CAN 9; the collection board uses STM37F373 multichannel 16 to be SDADC, it includes the direct current signal acquisition passageway to gather the board, alternating current signal acquisition passageway and voltage signal acquisition passageway, it uses STM37F373 multichannel 16 bit SDADC to gather the board, possess the high resolution, direct current signal acquisition passageway has been designed, alternating current signal acquisition passageway, voltage signal acquisition passageway, satisfy the demand of most operating modes, with data acquisition, the conversion, the analysis, upload the function integration as an organic whole, low cost, and convenient operation.

The clamping circuit comprises a first clamping circuit 4 and a second clamping circuit 10;

the conditioning circuit comprises a first conditioning circuit 6, a second conditioning circuit 7 and a third conditioning circuit 11;

the 24V isolation power supply 1 is used for supplying power to the VDC sensor;

the 24V-to-15V isolation power supply 2 is used for supplying power to IDC and IAC sensors;

the 24V-to-5V isolation power supply 3 is used for supplying power for VREF, operational amplifier, VCC and VDD;

the power supply module integrates all elements required for collecting analog quantity signals;

the AD 6375 is used for integrating the signal to output an RMS value, and an AD 6375 integration chip is used for perfectly solving the problem of difficult acquisition of the original analog quantity;

the conditioning circuit is used for filtering the signals and amplifying the signals so as to facilitate the processing of the MCU 8;

the MCU 8 is used for converting the analog quantity into digital quantity, collecting data and reporting the data through a CAN 9 bus;

the CAN 9 is used for reporting the data processed by the MCU 8.

The first clamping circuit 4, the AD 6375, the first conditioning circuit 6 and the MCU 8 are combined to form a signal acquisition processing module, the signal acquisition processing module integrates a large-current signal through the AD 6375 to convert the large-current signal into an RMS value which is convenient for the MCU 8 to process, and then an AD converter of the MCU 8 converts an analog quantity into a digital quantity; MCU 8, CAN 9 make up and form data transmission module, and this data transmission module lies in utilizing AD converter to have turned into the data of digital quantity earlier, directly uploads the host computer through CAN 9 pin, has saved this step of handling the analog quantity for the collection to heavy current data is simpler and easier.

Debugging description of the acquisition plate:

debugging of the acquisition board firstly needs to configure a development environment by using the MDK, and after the environment configuration is successful, a program CAN be downloaded into the MCU through the CAN bus for debugging;

debugging each module first, and then debugging the whole system;

powering up the whole system, connecting the output of the sensor to the input port of the corresponding channel, observing whether the CAN bus transmits data to the upper computer, and if the upper computer receives the data, indicating that the debugging is successful;

and starting to record test data after everything is normal.

To sum up, a be applied to heavy current sensor analog quantity and gather board possesses:

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. An analog quantity acquisition board applied to a large-current sensor comprises an acquisition board, and is characterized in that the acquisition board comprises a 24V isolation power supply (1), a 24V-to-15V isolation power supply (2), a 24V-to-5V isolation power supply (3), a clamp voltage circuit, an AD637(5), a conditioning circuit, an MCU (8) and a CAN (9);

the clamping circuit comprises a first clamping circuit (4) and a second clamping circuit (10);

the conditioning circuit comprises a first conditioning circuit (6), a second conditioning circuit (7) and a third conditioning circuit (11);

the 24V isolation power supply (1) is used for supplying power to the VDC sensor;

the 24V-to-15V isolation power supply (2) is used for supplying power to IDC and IAC sensors;

the 24V-to-5V isolation power supply (3) is used for supplying power for VREF, operational amplifier, VCC and VDD;

the AD637(5) is used for integrating the signal to output an RMS value;

the conditioning circuit is used for filtering signals;

the MCU (8) is used for converting analog quantity into digital quantity;

and the CAN (9) is used for reporting the data processed by the MCU (8).

2. The analog quantity acquisition board applied to the large-current sensor is characterized in that the first clamping circuit (4), the AD637(5), the first conditioning circuit (6) and the MCU (8) are combined to form a signal acquisition processing module.

3. The analog quantity acquisition board applied to the large-current sensor is characterized in that the MCU (8) and the CAN (9) are combined to form a data transmission module.

4. The analog quantity acquisition board applied to the high-current sensor is characterized in that the acquisition board uses STM37F373 multichannel 16-bit SDADC.

5. The analog quantity acquisition board applied to the large-current sensor is characterized in that the acquisition board comprises a direct-current signal acquisition channel, an alternating-current signal acquisition channel and a voltage signal acquisition channel.