CN209764936U

CN209764936U - Passive isolated voltage acquisition module

Info

Publication number: CN209764936U
Application number: CN201920272656.7U
Authority: CN
Inventors: 程庆珍
Original assignee: Shenzhen Wolongwo Automation Equipment Co Ltd
Current assignee: Shenzhen Wolongwo Automation Equipment Co Ltd
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2019-12-10
Anticipated expiration: 2029-03-05

Abstract

The utility model discloses a passive isolation type voltage acquisition module, which comprises a power module for direct current boost conversion and isolation and a conversion module for acquiring voltage signals and isolating and outputting the voltage signals; the power supply module supplies power to the conversion module; the conversion module comprises an input interface P2 connected with a voltage signal to be acquired, an acquisition module and an output interface P1 used for connecting a signal output end; the power supply module is respectively connected with the acquisition module and the output interface P1; the output end of the input interface P2 is connected with the input end of the acquisition module; the output end of the acquisition module is connected with the output interface P1; the utility model discloses an input interface as signal input part need not to provide power supply, only need connect the power all the way at the output kneck as signal output part can, simplified power supply line, better application prospect has.

Description

Passive isolated voltage acquisition module

Technical Field

The utility model relates to voltage acquisition technical field especially involves a passive isolated form voltage acquisition module.

Background

The current passive isolation type voltage acquisition module needs to provide power supplies at a signal input end and a signal output end, and the complexity of a circuit structure is increased, so that the prior art has defects and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a passive isolated form voltage acquisition module, the above-mentioned problem of solution.

in order to solve the above problem, the utility model provides a technical scheme as follows:

a passive isolation type voltage acquisition module comprises a power module for direct current boost conversion and isolation and a conversion module for acquiring voltage signals and isolating and outputting the voltage signals; the power supply module supplies power to the conversion module; the conversion module comprises an input interface P2 connected with a voltage signal to be acquired, an acquisition module and an output interface P1 used for connecting a signal output end; the power supply module is respectively connected with the acquisition module and the output interface P1; the output end of the input interface P2 is connected with the input end of the acquisition module; the output end of the acquisition module is connected with the output interface P1.

The beneficial effects for prior art are that, adopt above-mentioned scheme, the utility model discloses an input interface as signal input part need not to provide power supply, only need connect the power all the way at the output kneck as signal output part can, simplified power supply line, better application prospect has.

Drawings

For a clearer explanation of the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of a passive isolation type voltage acquisition module according to the present invention;

Fig. 2 is a schematic diagram of a power module circuit of a passive isolation type voltage acquisition module according to the present invention;

Fig. 3 is a schematic diagram of a conversion module circuit of a passive isolation type voltage acquisition module according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "fixed," "integrally formed," "left," "right," and the like in this specification is for illustrative purposes only, and elements having similar structures are designated by the same reference numerals in the figures.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1-3, one embodiment of the present invention is:

The power supply module comprises a resistor R9, capacitors C1-C4, a diode D1 and an integrated circuit U1;

The 1 st pin of the integrated circuit U1 is respectively connected with the second ends of the capacitors C1-C2; the 2 nd pin of the integrated circuit U1 is respectively connected with the first ends of the capacitors C1-C2; the second end of the capacitor C1 is grounded; the 3 rd pin of the integrated circuit U1 and the second ends of the capacitors C3-C4 are connected with analog ground; the 4 th pin of the integrated circuit U1 is respectively connected with the first ends of the capacitors C3-C4 and the first end of the resistor R9; a second end of the resistor R9 is connected with the anode of the diode D1; the cathode of the diode D1 is connected with the analog ground;

the diode D1 is a green light-emitting diode and is used for indicating the work of the power supply module; the integrated circuit U1 is B0305S-1WR 2.

The acquisition module comprises resistors R1-R8, a capacitor C5, triodes Q1-Q4 and an integrated circuit IC 1;

The 1 st pin of the input interface P2 is connected with an analog ground; the 2 nd pin of the input interface P2 is connected with the first end of the resistor R7; the 3 rd pin of the output interface P1 is grounded; the 1 st pin of the output interface P1 is connected with the first end of the capacitor C1 and the first end of the resistor R1; the 2 nd pin of the output interface P1 is connected with the second end of the resistor R3; a first end of the capacitor C3 is connected with a first end of the resistor R6;

the input interface P2 is used for connecting the voltage to be collected; the output interface P1 is used for outputting the analog quantity of the voltage to be collected;

A second end of the resistor R7 is respectively connected with the base of the triode Q4 and the 3 rd pin of the integrated circuit IC 1; the emitter of the triode Q4 is respectively connected with the base of the triode Q3 and the second end of the resistor R6; a first end of the resistor R6 is connected with a 2 nd pin of the integrated circuit IC 1; the collector of the triode Q3 is connected with the 1 st pin of the integrated circuit IC 1; the emitter of the triode Q3 is connected with the first end of the resistor R8; the second end of the resistor R8, the collector of the transistor Q4 and the 4 th pin of the integrated circuit IC1 are all connected with an analog ground; the 5 th pin of the integrated circuit IC1, the second end of the resistor R4 and the collector of the transistor Q2 are all grounded; the 6 th pin of the integrated circuit IC1 is respectively connected with the first end of the resistor R5 and the base electrode of the triode Q2; a first end of the resistor R1 is connected with a first end of the resistor R2; a second end of the resistor R1 is respectively connected with the base electrode of the triode Q1 and the emitter electrode of the triode Q2; the second end of the resistor R2 is connected with the first end of the resistor R3, the second end of the resistor R5, the first end of the capacitor C5 and the collector of the transistor Q1 respectively; the emitter of the triode Q1 is connected with the first end of the resistor R4; the second end of the capacitor C5 is grounded;

The types of the triodes Q1 and Q3 are both 2N 3904; the types of the triodes Q2 and Q4 are both 2N 3906; the integrated circuit IC1 is model HCNR 201.

It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims

1. A passive isolation type voltage acquisition module is characterized by comprising a power module for performing direct current boost conversion and isolation and a conversion module for acquiring voltage signals and performing isolated output; the power supply module supplies power to the conversion module; the conversion module comprises an input interface P2 connected with a voltage signal to be acquired, an acquisition module and an output interface P1 used for connecting a signal output end; the power supply module is respectively connected with the acquisition module and the output interface P1; the output end of the input interface P2 is connected with the input end of the acquisition module; the output end of the acquisition module is connected with the output interface P1.

2. the passive isolation type voltage acquisition module of claim 1, wherein the acquisition module comprises resistors R1-R8, a capacitor C5, a transistor Q1-Q4 and an integrated circuit IC 1.

3. The passive isolation type voltage acquisition module of claim 2, wherein the second end of the resistor R7 is connected to the base of the transistor Q4 and the 3 rd pin of the integrated circuit IC1, respectively; the emitter of the triode Q4 is respectively connected with the base of the triode Q3 and the second end of the resistor R6; a first end of the resistor R6 is connected with a 2 nd pin of the integrated circuit IC 1; the collector of the triode Q3 is connected with the 1 st pin of the integrated circuit IC 1; the emitter of the triode Q3 is connected with the first end of the resistor R8; the second end of the resistor R8, the collector of the transistor Q4 and the 4 th pin of the integrated circuit IC1 are all connected with an analog ground; the 5 th pin of the integrated circuit IC1, the second end of the resistor R4 and the collector of the transistor Q2 are all grounded; the 6 th pin of the integrated circuit IC1 is respectively connected with the first end of the resistor R5 and the base electrode of the triode Q2; a first end of the resistor R1 is connected with a first end of the resistor R2; a second end of the resistor R1 is respectively connected with the base electrode of the triode Q1 and the emitter electrode of the triode Q2; the second end of the resistor R2 is connected with the first end of the resistor R3, the second end of the resistor R5, the first end of the capacitor C5 and the collector of the transistor Q1 respectively; the emitter of the triode Q1 is connected with the first end of the resistor R4; the second terminal of the capacitor C5 is connected to ground.

4. The passive isolation type voltage acquisition module of claim 2 or 3, wherein the transistors Q1 and Q3 are both 2N 3904; the models of the triodes Q2 and Q4 are both 2N 3906.

5. The passive isolation type voltage acquisition module of claim 4, wherein the integrated circuit IC1 has a model of HCNR 201.

6. the passive isolation type voltage acquisition module of claim 1, wherein the power supply module comprises a resistor R9, capacitors C1-C4, a diode D1 and an integrated circuit U1.

7. The passive isolation type voltage acquisition module of claim 6, wherein the 1 st pin of the integrated circuit U1 is respectively connected with the second ends of the capacitors C1-C2; the 2 nd pin of the integrated circuit U1 is respectively connected with the first ends of the capacitors C1-C2; the second end of the capacitor C1 is grounded; the 3 rd pin of the integrated circuit U1 and the second ends of the capacitors C3-C4 are connected with analog ground; the 4 th pin of the integrated circuit U1 is respectively connected with the first ends of the capacitors C3-C4 and the first end of the resistor R9; a second end of the resistor R9 is connected with the anode of the diode D1; the cathode of the diode D1 is connected to analog ground.

8. The passive isolation type voltage acquisition module of claim 6 or 7, wherein the diode D1 is a green light emitting diode for indicating the operation of the power supply module.

9. The passive isolation type voltage acquisition module of claim 8, wherein the integrated circuit U1 is B0305S-1WR 2.