CN218103586U

CN218103586U - Light source controller based on RS485 interface

Info

Publication number: CN218103586U
Application number: CN202222164667.8U
Authority: CN
Inventors: 蒙焕诗; 王勇; 梁光; 邓通华; 李永明; 邹梅英; 蒋周天
Original assignee: Shenzhen Danbes New Energy Technology Co ltd
Current assignee: Shenzhen Danbes New Energy Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-12-20
Anticipated expiration: 2032-08-17

Abstract

The utility model discloses a light source controller based on RS485 interface, which comprises an MCU control circuit module, an RS232 circuit module and a light source driving module, wherein the RS232 circuit module and the light source driving module are connected with the MCU control circuit module; the MCU control circuit module, the RS232 circuit module and the RS485 circuit module are provided with DC-DC circuit modules; the light source driving module and the DC-DC circuit module are connected with an anti-reverse module; the utility model can meet the requirement of communicating with various devices by providing RS232 and RS485 communication interfaces, thereby improving the application range; in addition, an anti-reverse connection protection circuit and an overcurrent protection circuit are added in the control circuit, so that the use reliability of the controller is ensured.

Description

Light source controller based on RS485 interface

Technical Field

The utility model relates to a light source controller technical field, concretely relates to light source controller based on RS485 interface.

Background

The light source controller based on the RS485 interface is a light source controller, provides stable brightness for equipment or a camera by driving a light source, keeps the brightness of an image consistent, and provides a guarantee basis for image identification, and the current light source controller has the following defects:

1. The communication mode is single, only an RS232 communication interface is provided, and various communication interfaces are not provided, so that the requirements of different communication occasions cannot be met;

2. the RS232 communication interface cannot carry out long-distance communication, is easy to interfere and cannot directly carry out communication with the PLC; resulting in the inability to communicate on a master-to-slave basis.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a light source controller based on an RS485 interface; the problem that a plurality of communication interfaces are compatible simultaneously is solved by connecting the RS485 circuit module and the RS232 circuit module on the MCU control circuit module.

The utility model discloses light source controller based on RS485 interface is realized through following technical scheme: the LED lamp comprises an MCU control circuit module, an RS232 circuit module and a light source driving module, wherein the RS232 circuit module and the light source driving module are connected with the MCU control circuit module;

the MCU control circuit module, the RS232 circuit module and the RS485 circuit module are provided with DC-DC circuit modules; and the light source driving module and the DC-DC circuit module are connected with an anti-reverse module.

As a preferred technical scheme, the light source driving circuit module is connected with an overcurrent protection circuit module; the overcurrent protection circuit module is connected with the MCU control circuit module.

As the preferred technical scheme, the MCU control circuit module is connected with a trigger interface circuit module.

The beneficial effects of the utility model are that: the problem that a plurality of communication interfaces are compatible simultaneously is solved by connecting the RS485 circuit module and the RS232 circuit module on the MCU control circuit module; meanwhile, the RS485 circuit module adopts a differential transmission mode, so that the transmission distance is greatly increased, the communication is not easily interfered, the problem of communication with a PLC is effectively solved, the problem of communication between one master and multiple slaves is solved, and the requirements of different communication occasions are met.

Drawings

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

Fig. 1 is a module schematic diagram of the light source controller based on the RS485 interface;

fig. 2 is a schematic circuit diagram of the light source controller based on the RS485 interface;

FIG. 3 is a circuit schematic of the reverse-connect prevention circuit module;

FIG. 4 is a circuit schematic of a DC-DC circuit module;

FIG. 5 is a schematic circuit diagram of an MCU control circuit module;

FIG. 6 is a schematic circuit diagram of an overcurrent protection circuit module;

FIG. 7 is a circuit diagram of an RS485 circuit module;

FIG. 8 is a circuit diagram of an RS232 circuit module;

fig. 9 is a circuit diagram of the light source driving circuit module.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

As shown in fig. 1-9, the light source controller based on the RS485 interface of the present invention includes an MCU control circuit module, an RS232 circuit module connected to the MCU control circuit module, and a light source driving module, wherein the MCU control circuit module is connected to the RS485 circuit module; the MCU control circuit module, the RS232 circuit module and the RS485 circuit module are provided with DC-DC circuit modules; the light source driving module and the DC-DC circuit module are connected with an anti-reverse module; the MCU is communicated with external equipment through RS232 and RS485 interfaces; the MCU switches the light source state through the trigger interface circuit; the MCU controls the brightness of the light source through the light source driving circuit; and detecting an over-current protection circuit signal, and judging whether the over-current exists or not so as to send alarm information.

In this embodiment, the MCU controls the circuit module: the minimum system circuit of the singlechip controls the working logic of each functional module;

the reverse connection prevention circuit module comprises: the power supply controller prevents the positive electrode and the negative electrode of the power supply from being reversely connected when a user supplies power to the power supply controller, and avoids the controller from being damaged; the power input end firstly passes through an anti-reverse connection circuit, and a 24V power supply can be input at most when the positive and negative power supplies are not connected in a wrong way; the safety tube is adopted to ensure that the power current is not overlarge to cause accidents.

DC-DC circuit module: the 24V voltage is converted into 5V voltage through a DC-DC circuit to supply power for a logic circuit and an MCU control circuit; and a special DC-DC voltage reduction chip is adopted, so that the conversion efficiency is ensured, the heating is reduced, and the service life is prolonged.

The overcurrent protection circuit module: sampling current by using two sampling resistors with 0.002 ohm, and closing output after the current exceeds a set current value so as to avoid damage of a controller; when the voltage is about 22A, the circuit is protected, when the circuit is normal, OC outputs low level, and the MOS tube is cut off; when the circuit is abnormal, the OC outputs high level, the MOS tube is conducted, the PC1 to PC4 are pulled down, and the light source output is cut off.

RS485 interface circuit module: the standard RS485 hardware interface circuit can be communicated with equipment with an RS485 interface outside; the two-wire system half-duplex communication mode is adopted, and communication can be carried out with equipment with an RS485 interface outside.

An RS232 circuit module: the standard RS232 hardware interface circuit can be communicated with equipment with an RS232 interface outside; and a universal RS232 interface is adopted, so that the communication can be carried out with a PC computer and equipment with the RS232 interface.

The light source driving circuit module: driving an LED light source, and adjusting the brightness of the light source through PWM; the MCU is connected with the TC4424 input interface through the PWM interface and controls the output end of the TC 4424; TC4424 drives AO4406 MOS tube driving light source; the MCU drives the MOS to switch after being amplified by a TC4424 signal by changing the duty ratio of PWM, thereby controlling the brightness change of the light source.

The trigger interface circuit module: the optical coupling isolation input is adopted, so that the anti-interference performance is improved, and an electric loop is isolated; the input end filters high-frequency interference signals through an RC filter circuit; through optical coupling isolation, the external circuit and the internal circuit of the controller are electrically isolated, and the stable work of the internal circuit of the controller is ensured.

In this embodiment, the light source driving circuit module is connected with an overcurrent protection circuit module; the overcurrent protection circuit module is connected with the MCU control circuit module; the MCU control circuit module is connected with a trigger interface circuit module.

The beneficial effects of the utility model are that: by providing RS232 and RS485 communication interfaces, the communication requirement of various devices can be met, and the application range of the communication device is improved; in addition, an anti-reverse connection protection circuit and an overcurrent protection circuit are added in the control circuit, so that the use reliability of the controller is ensured.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a light source controller based on RS485 interface, includes MCU control circuit module and connects RS232 circuit module and the light source drive module of MCU control circuit module, its characterized in that: the MCU control circuit module is connected with an RS485 circuit module;

2. The RS485 interface based light source controller of claim 1, wherein: the light source driving circuit module is connected with an overcurrent protection circuit module; the overcurrent protection circuit module is connected with the MCU control circuit module.

3. The RS485 interface based light source controller of claim 1, wherein: the MCU control circuit module is connected with a trigger interface circuit module.