CN203278856U

CN203278856U - A digital intelligent signal isolator

Info

Publication number: CN203278856U
Application number: CN 201320302479
Authority: CN
Inventors: 王克勤; 李斌; 黄光胜
Original assignee: SHANXI TONGHUA TECHNOLOGY CO LTD
Current assignee: SHANXI TONGHUA TECHNOLOGY CO LTD
Priority date: 2013-05-30
Filing date: 2013-05-30
Publication date: 2013-11-06
Anticipated expiration: 2023-05-30

Abstract

The utility model discloses a digital intelligent signal isolator and belongs to the technical field of signal isolators. A resolved technical problem is to provide a signal isolator with characteristics of digitally-adjustable gain and zero point, high reliability, and high transmission speed. An employed technical scheme is that the digital intelligent signal isolator comprises a first CPU module, a second CPU module, an A/D converting module, a D/A converting module, a transformer isolation communication module, and a power supply module, that the signal input port of the first CPU module is connected with the signal output port of the A/D converting module, that the signal output port of the first CPU module is connected with the signal input end of the transformer isolation communication module, that the signal output end of the transformer isolation communication module is connected with the signal input port of the second CPU module, and that the signal output port of the second CPU module is connected with the signal input port of the D/A converting module. The digital intelligent signal isolator is suitable for various signal isolation occasions.

Description

A kind of digital intelligent signal isolator

Technical field

A kind of digital intelligent signal isolator of the utility model belongs to the signal isolator technical field, is specifically related to the high digital intelligent signal isolator of a kind of reliability.

Background technology

Analog signal isolator can carry out high speed to the electrical parameter such as electric current, voltage or the non-electrical parameters such as temperature, resistance and accurately measure, convert the analog signal output of standard to through isolation, both can be directly and pointer gauge, digital display meter join, also can connect with automatic instrument(s) (as PLC), various A/D transducer and computer system, be widely used in the automated system of the industries such as electric power, railway, petrochemical industry, metallurgy, chemical industry, food, storage.

Because signal isolator adjustment gain is different, existing signal isolator is of a great variety, mostly adopt potentiometer adjustment gain, poor reliability, and general photoisolator integrated circuit is complicated, efficiency of transmission is not high, and error is large, and these bring a lot of troubles all for the production of signal isolator and application.

The utility model content

The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: but a kind of gain, digitlization adjustment at zero point are provided, and reliability is high, the signal isolator that transmission rate is high.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of digital intelligent signal isolator comprises: a CPU module, the 2nd CPU module, A/D modular converter, D/A modular converter, transformer isolation communication module and supply module;

The signal input port of a described CPU module is connected with the signal output port of A/D modular converter, the signal output port of the one CPU module is connected with the signal input part of transformer isolation communication module, the signal output part of described transformer isolation communication module is connected with the signal input port of the 2nd CPU module, and the signal output port of described the 2nd CPU module is connected with the signal input port of D/A modular converter;

Described supply module is whole signal isolator power supply.

Described signal isolator also includes display interface device module and keyboard interface module, and described display interface device module is connected with arbitrary CPU module in above-mentioned CPU module with the keyboard interface module.

Described supply module comprises: a DC/DC module, the 2nd DC/DC module and power module, the input of a described DC/DC module and the 2nd DC/DC module is connected with the power output end of power module respectively, the output of a described DC/DC module is connected with the power port of a CPU module, and the output of described the 2nd DC/DC module is connected with the power port of the 2nd CPU module.

Described signal isolator also includes communication interface module, and described communication interface module is connected with arbitrary CPU module in above-mentioned CPU module.

The beneficial effect that the utility model compared with prior art has is:

One, adopt two CPU modules control inputs signal and output signal respectively in the utility model, rely on the transformer isolation communication module, can realize the digitlization at gain and zero point is resolved and the digitlization adjustment, adjust precision high, gain adjustment range is wide, good reliability;

Two, adopt transformer isolation in the utility model, higher than photoelectricity isolation transmission rate, adopt high-precision A/D modular converter and D/A modular converter, whole device is error free at separator, and transmission rate is high, and error is little;

Three, be provided with display interface device module, keyboard interface module and communication interface module in the utility model, on-the-spot parameter setting and adjustment can either be facilitated, also remote signals collecting and adjustment can be realized, powerful, whole circuit structure is succinct, and is practical.

Description of drawings

The utility model is described in more detail below in conjunction with accompanying drawing:

Fig. 1 is electrical block diagram of the present utility model;

In figure: 1 is that a CPU module, 2 is that the 2nd CPU module, 3 is that A/D modular converter, 4 is that D/A modular converter, 5 is that transformer isolation communication module, 6 is that supply module, 7 is that display interface device module, 8 is that keyboard interface module, 9 is that a DC/DC module, 10 is that the 2nd DC/DC module, 11 is that power module, 12 is that communication interface module, 13 is that transmitter, 14 is PLC.

Embodiment

As shown in Figure 1, a kind of digital intelligent signal isolator of the utility model comprises: a CPU module 1, the 2nd CPU module 2, A/D modular converter 3, D/A modular converter 4, transformer isolation communication module 5 and supply module 6.

The signal input port of a described CPU module 1 is connected with the signal output port of A/D modular converter 3, the signal output port of the one CPU module 1 is connected with the signal input part of transformer isolation communication module 5, the signal output part of described transformer isolation communication module 5 is connected with the signal input port of the 2nd CPU module 2, and the signal output port of described the 2nd CPU module 2 is connected with the signal input port of D/A modular converter 4; Described supply module 6 is whole signal isolator power supply.

the input port of above-mentioned A/D modular converter 3 is connected with the output port of transmitter 13, the Gather and input signal, then the input signal conversion of adopting is sent to a CPU module 1, realize the collection of field data by a CPU module 1, then by transformer isolation communication module 5, the signal isolation is sent to the 2nd CPU module 2, the 2nd CPU module 2 realizes the transmission of field data, adopt transformer isolation communication module 5 higher than photoelectricity isolation transmission rate, and temperature is floated little, drift is little, data after isolating by D/A modular converter 4 are sent to PLC14, resolve and the digitlization adjustment with regard to the digitlization that has realized collection signal like this, parameter setting by a CPU module 1 and the 2nd CPU module 2, can realize gaining and the high accuracy at zero point, reliability is adjusted, gain adjustment range is wide, only have the wrong differential loss of A/D modular converter 3 and D/A modular converter 4 to lose in whole device, adopt high-precision A/D modular converter 3 and D/A modular converter 4 can avoid the existence of above-mentioned error, relatively isolate and pure transformer isolation with photoelectricity in the past, error free at separator in the utility model, whole directional error is very little.

Described signal isolator also includes display interface device module 7 and keyboard interface module 8, and described display interface device module 7 is connected with arbitrary CPU module in above-mentioned CPU module with keyboard interface module 8; Described signal isolator also includes communication interface module 12, and described communication interface module 12 is connected with arbitrary CPU module in above-mentioned CPU module.

In this embodiment, described display interface device module 7, keyboard interface module 8 and communication interface module 12 all are connected with the 2nd CPU module 2, the 2nd CPU module 2 can connect PLC14 or other control appliance by communication interface module 12, in-plant parameter adjustment and setting can be realized, also remote data acquisition can be realized; By aforementioned display device interface module 7, keyboard interface module 8 and communication interface module 12, make whole signal isolator easy to use, powerful.

Described supply module 6 comprises: a DC/DC module 9, the 2nd DC/DC module 10 and power module 11, the input of a described DC/DC module 9 and the 2nd DC/DC module 10 is connected with the power output end of power module 11 respectively, the output of a described DC/DC module 9 is connected with the power port of a CPU module 1, and the output of described the 2nd DC/DC module 10 is connected with the power port of the 2nd CPU module 2; Adopt above-mentioned power supply circuits, can realize the isolation of power supply, increase electromagnetic isolation and the reliability of whole device.

The above has done detailed description to embodiment of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skills possess, can also make various variations under the prerequisite that does not break away from the utility model aim.

Claims

1. a digital intelligent signal isolator, is characterized in that: comprising: a CPU module (1), the 2nd CPU module (2), A/D modular converter (3), D/A modular converter (4), transformer isolation communication module (5) and supply module (6);

The signal input port of a described CPU module (1) is connected with the signal output port of A/D modular converter (3), the signal output port of the one CPU module (1) is connected with the signal input part of transformer isolation communication module (5), the signal output part of described transformer isolation communication module (5) is connected with the signal input port of the 2nd CPU module (2), and the signal output port of described the 2nd CPU module (2) is connected with the signal input port of D/A modular converter (4);

Described supply module (6) is whole signal isolator power supply.

2. a kind of digital intelligent signal isolator according to claim 1, it is characterized in that: described signal isolator also includes display interface device module (7) and keyboard interface module (8), and described display interface device module (7) is connected with arbitrary CPU module in above-mentioned CPU module with keyboard interface module (8).

3. a kind of digital intelligent signal isolator according to claim 1 and 2, it is characterized in that: described supply module (6) comprising: a DC/DC module (9), the 2nd DC/DC module (10) and power module (11), the input of a described DC/DC module (9) and the 2nd DC/DC module (10) is connected with the power output end of power module (11) respectively, the output of a described DC/DC module (9) is connected with the power port of a CPU module (1), the output of described the 2nd DC/DC module (10) is connected with the power port of the 2nd CPU module (2).

4. a kind of digital intelligent signal isolator according to claim 3, it is characterized in that: described signal isolator also includes communication interface module (12), and described communication interface module (12) is connected with arbitrary CPU module in above-mentioned CPU module.