CN214011974U

CN214011974U - Serial port isolation plate

Info

Publication number: CN214011974U
Application number: CN202023096098.5U
Authority: CN
Inventors: 康野; 彭旭祺; 杨效; 杨宏杰; 翁一举; 何睿; 范佳
Original assignee: Zhejiang University Mingquan Technology Co ltd
Current assignee: Zhejiang University Mingquan Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-20
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a serial port isolation plate, including the serial port isolation plate, the serial port isolation plate can be dismantled and installed on the inner wall of equipment, and the serial port isolation plate includes circuit substrate, is equipped with RS serial port, opto-coupler isolation chip, positive and negative voltage rectifier circuit, charge pump and voltage stabilizing circuit on the circuit substrate respectively, and RS serial port connection opto-coupler isolation chip, positive and negative voltage rectifier circuit obtain the power from at least one signal line of three signal lines of TXD, DTR, RTS to a positive voltage and a negative voltage of rectifying; the charge pump converts the negative voltage output by the positive and negative voltage rectification circuit into positive voltage; positive voltage respectively output by the positive and negative voltage rectification circuit and the charge pump is output after being stabilized by the voltage stabilizing circuit, the utility model adopts the optical coupling isolation circuit to realize the electrical isolation of equipment at two ends; adopting a power-free design to directly take electricity from a serial communication line; the device can be directly installed in the device to replace the existing common interface, and the isolation between the device and external communication equipment can be realized at a port.

Description

Serial port isolation plate

Technical Field

The utility model relates to an electrical equipment technical field specifically is a serial ports division board.

Background

Because the electromagnetic environment of the detection station is severe, the detection equipment is easily interfered by surge, static electricity, pulse group and the like, so that the equipment is abnormal and even damaged. In order to avoid mutual interference between devices, the device at two ends using serial communication is prevented from being damaged due to circulation current caused by potential difference. And avoid the damage that severe environment such as surge, thunderbolt, static caused to equipment, install external photoelectric isolator additional at serial ports communication port generally, as shown in figure 1. The common serial port isolator needs to be independently installed outside the equipment, is poor in installation reliability and is easy to fall off.

Based on this, the utility model designs a serial ports division board to solve the above-mentioned problem of mentioning.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a serial ports division board to solve the above-mentioned problem of mentioning.

In order to achieve the above object, the utility model provides a following technical scheme: a serial port isolation plate comprises a serial port isolation plate, wherein the serial port isolation plate is detachably mounted on the inner wall of equipment, the serial port isolation plate comprises a circuit substrate, an RS serial port, an optical coupling isolation chip, a positive and negative voltage rectification circuit, a charge pump and a voltage stabilizing circuit are respectively arranged on the circuit substrate, the RS serial port is connected with the optical coupling isolation chip, the positive and negative voltage rectification circuit obtains a power supply from at least one signal line of TXD (transmission X), DTR (digital transmission receiver) and RTS (ready to send) signal lines, and rectifies a positive voltage and a negative voltage; the charge pump converts the negative voltage output by the positive and negative voltage rectification circuit into a positive voltage; and positive voltages respectively output by the positive and negative voltage rectification circuits and the charge pump are output after being stabilized by the voltage stabilizing circuit.

Preferably, the outer wall of the circuit substrate is provided with a second mounting screw hole, and the circuit substrate is connected to the equipment through the second mounting screw hole and a bolt.

Preferably, the outer wall of the RS serial port is provided with a first mounting screw hole, and the RS serial port is connected to the circuit substrate through the first mounting screw hole and a bolt.

Compared with the prior art, the beneficial effects of the utility model are that:

firstly, the utility model adopts the optical coupling isolation circuit to realize the electrical isolation of the two-end equipment;

secondly, the utility model adopts the design of no power supply to directly get electricity from the serial communication line;

third the utility model discloses but the direct mount is inside equipment, replaces current ordinary interface, can realize the isolation with external communication equipment in port department.

Drawings

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

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic view of the connection structure of the present invention and the apparatus;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a circuit diagram of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. equipment; 2. a serial port isolation board; 3. a circuit substrate; 4. an RS232 serial port; 5. an optical coupling isolation chip; 6. a positive and negative voltage rectifying circuit; 7. a charge pump; 8. a voltage stabilizing circuit; 9. mounting a first screw hole; 10. and mounting a second screw hole.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 2-4, the present invention provides a technical solution: a serial port division board which is characterized in that: the device comprises a serial port isolation plate 2, wherein the serial port isolation plate 2 is detachably mounted on the inner wall of the device 1, the serial port isolation plate 2 comprises a circuit substrate 3, an RS232 serial port 4, an optical coupling isolation chip 5, a positive and negative voltage rectification circuit 6, a charge pump 7 and a voltage stabilizing circuit 8 are respectively arranged on the circuit substrate 3, the RS232 serial port 4 is connected with the optical coupling isolation chip 5, the positive and negative voltage rectification circuit 6 obtains a power supply from at least one signal line of TXD, DTR and RTS signal lines and rectifies a positive voltage and a negative voltage; the charge pump 7 converts the negative voltage output by the positive and negative voltage rectification circuit 6 into a positive voltage; the positive voltage output by the positive and negative voltage rectification circuit 6 and the positive voltage output by the charge pump 7 are stabilized by the voltage stabilizing circuit 8 and then output.

And a second mounting screw hole 10 is formed in the outer wall of the circuit substrate 3, and the circuit substrate 3 is connected to the equipment 1 through the second mounting screw hole 10 and a bolt. And a first mounting screw hole 9 is formed in the outer wall of the RS232 serial port 4, and the RS232 serial port 4 is connected to the circuit substrate 3 through the first mounting screw hole 9 and a bolt.

The specific working principle is as follows:

the serial port isolation board 2 adopts an optical coupling isolation technology to isolate two three-wire system RS-232 devices, can completely isolate the two three-wire system RS-232 devices which are communicated with each other electrically, can effectively avoid mutual interference between the devices, and prevents the devices at two ends from being damaged due to circulation caused by potential difference. And can effectively avoid the severe environment such as surge, thunderbolt, static and cause the damage to equipment. An external power supply is not needed, a power supply is obtained from at least one signal wire of the TXD signal wire, the DTR signal wire and the RTS signal wire of the serial ports of the equipment at two ends through the positive and negative voltage rectification circuit 6, and the voltage of the TXD pin fluctuates between minus 15V and plus 15V when data is transmitted. In order to provide a stable supply voltage to the optocoupler, the negative voltage is pumped to a positive voltage by the charge pump 7 when the TXD pin is at a negative voltage level.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A serial port division board which is characterized in that: the device comprises a serial port isolation plate (2), wherein the serial port isolation plate (2) is detachably mounted on the inner wall of the device (1), the serial port isolation plate (2) comprises a circuit substrate (3), an RS232 serial port (4), an optical coupling isolation chip (5), a positive and negative voltage rectification circuit (6), a charge pump (7) and a voltage stabilizing circuit (8) are respectively arranged on the circuit substrate (3), the RS232 serial port (4) is connected with the optical coupling isolation chip (5), and the positive and negative voltage rectification circuit (6) acquires a power supply from at least one signal line of TXD, DTR and RTS signal lines and rectifies a positive voltage and a negative voltage; the charge pump (7) converts the negative voltage output by the positive and negative voltage rectifying circuit (6) into a positive voltage; the positive voltage output by the positive and negative voltage rectification circuit (6) and the positive voltage output by the charge pump (7) are output after being stabilized by the voltage stabilizing circuit (8).

2. The serial port isolation board of claim 1, wherein: and a second mounting screw hole (10) is formed in the outer wall of the circuit substrate (3), and the circuit substrate (3) is connected to the equipment (1) through the second mounting screw hole (10) and a bolt.

3. The serial port isolation board of claim 1, wherein: and a first mounting screw hole (9) is formed in the outer wall of the RS232 serial port (4), and the RS232 serial port (4) is connected to the circuit substrate (3) through the first mounting screw hole (9) and a bolt.