CN211718723U

CN211718723U - Highly integrated signal input and output isolation module and signal collector

Info

Publication number: CN211718723U
Application number: CN201922489955.9U
Authority: CN
Inventors: 陆洁平; 肖珺; 许森飞
Original assignee: Cgn Dasheng Electron Accelerator Technology Co ltd
Current assignee: Cgn Dasheng Electron Accelerator Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-20
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a highly integrated signal input and output isolation module, which adopts a transformer isolation mode to isolate the power supplies of an input end, an output end and a processing end; the input includes electric connection's signal acquisition module, input protection circuit, ADC module in proper order, the output includes electric connection's DAC module, output protection circuit in proper order, the processing end includes electric connection's CPU processing module, communication conversion module, the ADC module is through input isolation coupling module and CPU processing module electric connection, the DAC module is through output isolation coupling module and CPU processing module electric connection. In this way, the utility model has the advantages of signal transmission distortion is little, anti-interference strong, isolation protection is perfect, scalability.

Description

Highly integrated signal input and output isolation module and signal collector

Technical Field

The utility model relates to a signal isolation module field especially relates to a module and signal collector are kept apart to signal input output of high integration.

Background

The signal isolation protection is mainly to prevent the sampled signal from damaging the back-end circuit, and adopts an isolation mode to transmit the signal, thereby sequentially ensuring the safety of the receiving end.

The existing signal isolation protection mode is single, the output mode is single, and the safety is poor, so that the signal isolation protection method has the defects of small application range, insufficient protection, easiness in damage and the like.

Therefore, it is necessary to develop an isolation module with good protection performance and wide application range.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a signal input/output who highly integrates keeps apart module and signal collector.

In order to solve the technical problem, the utility model discloses a technical scheme be: providing a highly integrated signal input and output isolation module, and isolating power supplies of an input end, an output end and a processing end by adopting a transformer isolation mode; the input includes electric connection's signal acquisition module, input protection circuit, ADC module in proper order, the output includes electric connection's DAC module, output protection circuit in proper order, the processing end includes electric connection's CPU processing module, communication conversion module, the ADC module is through input isolation coupling module and CPU processing module electric connection, the DAC module is through output isolation coupling module and CPU processing module electric connection.

In a preferred embodiment of the present invention, the ADC module is an analog-to-digital converter with model MPC3221, and the DAC module is a digital-to-analog converter with model DAC 7512.

In a preferred embodiment of the present invention, the input isolation coupling module adopts a dual-channel digital isolator with model number of ADuM1201, and the output isolation coupling module adopts two dual-channel digital isolators with model number of ADuM 1200.

In a preferred embodiment of the present invention, the CPU processing module uses a single chip microcomputer with model STC8A8K64S4a 12.

In a preferred embodiment of the present invention, the communication converter module is a communication converter of type ISO 3082.

In a preferred embodiment of the present invention, the input protection circuit includes a first TVS tube, a first capacitor, a third resistor, a first diode, a second diode and a first voltage follower, the first TVS tube is connected in parallel with the first capacitor, the negative terminal of the third resistor, the first diode, and the positive terminal of the second diode are respectively connected to the non-inverting terminal of the first voltage follower, and the positive terminal of the first diode, the negative terminal of the second diode are connected to the inverting terminal of the first voltage follower.

In a preferred embodiment of the present invention, the output protection circuit includes a fourth resistor, a second voltage follower, and a second TVS tube, the fourth resistor is connected to the non-inverting terminal of the second voltage follower, and the second TVS tube is connected to the output terminal of the second voltage follower.

The utility model discloses another technical scheme who adopts is: a signal collector with a highly integrated signal input/output isolation module is provided.

The utility model has the advantages that: the utility model discloses signal input/output keeps apart the module and has advantages such as signal transmission distortion is little, anti-interference strong, isolation protection is perfect, scalability, but signal analog output also can be through communication conversion module and PLC or industrial computer direct communication connection.

Drawings

Fig. 1 is a schematic diagram of the signal input/output isolation module of the present invention;

fig. 2 is a circuit diagram of the signal input/output isolation module of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1, the present invention includes:

a highly integrated signal input/output isolation module, a power supply system adopts an isolation transformer 3 to isolate the power supplies of an input end 1, an output end 2 and a processing end 4;

the input end 1 comprises a signal acquisition module 5, an input protection circuit 6 and an ADC module 7 which are electrically connected in sequence, the output end 2 comprises a DAC module 13 and an output protection circuit 14 which are electrically connected in sequence, the processing end 4 comprises a CPU processing module 9 and a communication conversion module 10 which are electrically connected, the ADC module 7 is electrically connected with the CPU processing module 9 through an input isolation coupling module 8, and the DAC module 13 is electrically connected with the CPU processing module 9 through an output isolation coupling module 12;

the concrete mode is as follows: the signal acquisition module 5 samples and acquires voltage signals, the voltage signals are transmitted to the ADC module 7 after passing through the input protection circuit 6, the voltage signals are converted into digital signals, and the digital signals are transmitted to the CPU processing module 9 for processing after passing through the input isolation coupling module 8; after the operation processing of the CPU processing module, on one hand, the digital signal is transmitted to the DAC module through the output isolation coupling module 12, and then the digital signal is converted into a voltage signal and is output after passing through the output protection circuit 14; on the other hand, the data can be transmitted to the communication conversion module 10 to be converted into digital communication modes such as 232, 485 and DP for output, and the corresponding communication module can be selected to obtain the sampling information according to actual needs.

Referring to fig. 2, in the present embodiment, the ADC module 7 adopts an analog-to-digital converter with a model of MPC3221, and the DAC module 13 adopts a digital-to-analog converter with a model of DAC 7512; the input isolation coupling module 8 adopts a dual-channel digital isolator with the model of ADuM1201, and the output isolation coupling module 12 adopts two dual-channel digital isolators with the model of ADuM 1200; the CPU processing module 9 adopts a singlechip with the model of STC8A8K64S4A 12; the communication conversion module 10 adopts a communication converter with the model number of ISO 3082;

wherein, the 3 pin and the 2 pin of the analog-to-digital converter of the MPC3221 are connected with the input protection circuit 6, the 5 pin of the analog-to-digital converter of the MPC3221 is connected with the 2 pin of the dual-channel digital isolator of the ADuM1201, the 4 pin of the analog-to-digital converter of the MPC3221 is connected with the 3 pin of the dual-channel digital isolator of the ADuM1201, the 7 pin of the dual-channel digital isolator of the ADuM1201 is connected with the 45 pin of the single chip microcomputer of the STC8A8K64S4a12, the 6 pin of the dual-channel digital isolator of the ADuM1201 is connected with the 46 pin of the single chip microcomputer of the STC8A8K64S4a12, the 22 pin and the 23 pin of the single chip microcomputer of the STC8A8K64S4a12 are respectively connected with the 2 pin and the 3 pin of the dual-channel digital isolator of one of the ADuM1200, the 7 pin and the 6 pin of the dual-channel digital isolator of the ADuM1200 are respectively connected with the 4 pin and the 5 pin of the DAC7512, the DAC 758 a 4a 9, and the other dual-channel digital isolator of the DAC7512,

pins

1 and 2 of a digital-to-analog converter of the DAC7512 are connected with an output protection circuit 14; and 3 pins and 4 pins of the communication converter of ISO3082 are connected with 25 pins of a singlechip of STC8A8K64S4A 12.

Specifically, the input protection circuit 6 includes a first TVS transistor T1, a first capacitor C1, a third resistor R3, a first diode D1, a second diode D2 and a first voltage follower, one end of the first TVS transistor T1, one end of the first capacitor C1 and one end of the third resistor R3 are connected, the other end of the third resistor R3, the negative end of the first diode D1 and the positive end of the second diode D2 are connected to the same-phase end of the first voltage follower, the positive end of the first diode D1 and the negative end of the second diode D2 are connected to the inverting end of the first voltage follower, the output end of the first voltage follower is connected to the 3 pin of the analog-to-digital converter MPC3221, and the other end of the first TVS transistor T1 and the other end of the first capacitor C1 are connected to the 2 pin of the analog-to-digital converter MPC 3221;

the output protection circuit 14 comprises a fourth resistor R4, a second voltage follower and a second TVS tube T2, one end of the fourth resistor R4 is connected with 1 pin of the digital-to-analog converter of the DAC7512, the other end of the fourth resistor R4 is connected with the non-inverting end of the second voltage follower, one end of the second TVS tube T2 is connected with the output end of the second voltage follower, and the other end of the second TVS tube T2 is connected with 2 pins of the digital-to-analog converter of the DAC 7512.

The utility model discloses signal input/output isolation module can apply to in the signal collection station to can obtain the signal collection station that a signal transmission distortion is little, interference immunity is strong.

To sum up, the utility model discloses signal input/output keeps apart module has that signal transmission distortion is little, anti-interference strong, isolation protection is perfect, advantages such as scalability.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A highly integrated signal input/output isolation module is characterized in that a power supply system isolates power supplies of an input end (1), an output end (2) and a processing end (4) in a transformer isolation mode; its characterized in that, input (1) is including electric connection's signal acquisition module (5), input protection circuit (6), ADC module (7) in proper order, output (2) are including electric connection's DAC module (13), output protection circuit (14) in proper order, processing end (4) are including electric connection's CPU processing module (9), communication conversion module (10), ADC module (7) are through input isolation coupling module (8) and CPU processing module (9) electric connection, DAC module (13) are through output isolation coupling module (12) and CPU processing module (9) electric connection.

2. The highly integrated signal input output isolation module of claim 1, wherein the ADC module (7) is an analog-to-digital converter of the type MPC3221, and the DAC module (13) is a digital-to-analog converter of the type DAC 7512.

3. The highly integrated signal input output isolation module according to claim 1, wherein the input isolation coupling module (8) employs one dual-channel digital isolator of type ADuM1201, and the output isolation coupling module (12) employs two dual-channel digital isolators of type ADuM 1200.

4. The highly integrated signal input output isolation module according to claim 1, wherein the CPU processing module (9) is a single chip microcomputer with model STC8A8K64S4A 12.

5. The highly integrated signal input output isolation module according to claim 1, wherein the communication conversion module (10) employs a communication converter of type ISO 3082.

6. The highly integrated signal input output isolation module according to claim 1, wherein the input protection circuit (6) comprises a first TVS tube (T1), a first capacitor (C1), a third resistor (R3), a first diode (D1), a second diode (D2) and a first voltage follower, the first TVS tube (T1) is connected in parallel with the first capacitor (C1), the third resistor (R3), a negative terminal of the first diode (D1) and a positive terminal of the second diode (D2) are respectively connected with a non-inverting terminal of the first voltage follower, and a positive terminal of the first diode (D1) and a negative terminal of the second diode (D2) are connected with an inverting terminal of the first voltage follower.

7. The highly integrated signal input output isolation module of claim 1, wherein the output protection circuit (14) comprises a fourth resistor (R4), a second voltage follower, a second TVS transistor (T2), the fourth resistor (R4) is connected to a non-inverting terminal of the second voltage follower, and the second TVS transistor (T2) is connected to an output terminal of the second voltage follower.

8. A signal collector having a highly integrated signal input output isolation module as claimed in claims 1-7.