CN210442665U

CN210442665U - Power supply device adopting circuit mutual exclusion control

Info

Publication number: CN210442665U
Application number: CN201921776737.7U
Authority: CN
Inventors: 刘加庆; 曹智博; 李盛平
Original assignee: Intelligent Automation Equipment Zhuhai Co Ltd
Current assignee: Intelligent Automation Equipment Zhuhai Co Ltd; Intelligent Automation Zhuhai Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-05-01
Anticipated expiration: 2029-10-22

Abstract

The utility model discloses and provides a power supply unit of adoption circuit mutual exclusion control that reliability is high, stability is good. The power supply control system comprises an upper computer, a three-eight decoder and a power supply output, wherein the upper computer is connected with the three-eight decoder through a coding control signal line and an enabling control signal line, the coding control signal line has three paths, the enabling control signal line has three paths, the three-eight decoder is connected with the eight power supply output through a power supply output control signal line, and the power supply output control signal line comprises eight paths from a power supply output control signal 1 to a power supply output control signal 8. The utility model has the advantages of control simplification, needn't worry the output conflict, needn't worry about closing another way output earlier before opening a certain way control, because the output result is exactly the mutex originally, can also effectively practice thrift MCU's IO resource.

Description

Power supply device adopting circuit mutual exclusion control

Technical Field

The utility model relates to a working power supply of electronic and electrical products or equipment especially relates to the condition that working power supply of electronic and electrical products or equipment is multichannel or multiunit power supply.

Background

With the continuous progress and development of society, electronic products become indispensable articles around our bodies, so that the reliability and the working requirements of the electronic products are higher and higher, and a reliable hardware system, namely a power supply system, is also needed for an excellent electronic product besides the beautiful appearance. At present, a power supply system of a mainstream independent product basically depends on MCU or an upper computer to perform logic control power supply, so that the power supply system with high reliability can be realized, and automation and intellectualization are realized. However, the practical application is not satisfactory, and it is believed that the computer is often halted or the household appliance is too alert. Therefore, the reliability of the product power supply cannot be realized only by the upper computer or the MCU, and the upper computer or the singlechip cannot be known when and out of control working state beyond what you expect can not occur. Therefore, it is necessary to develop a power hardware control system adopting a circuit mutual exclusion control scheme because the power hardware control system cannot be expected to correctly control the power system according to the will of the user, and the user needs to put an end to the destructive attack of the host computer and the MCU on the power system in any state.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a power supply unit of adoption circuit mutex control that the reliability is high, stability is good.

The utility model adopts the technical proposal that: the utility model discloses an upper computer, three eight decoders, power output includes eight ways, the upper computer pass through encoding control signal line, enable control signal line with three eight decoders are connected, encoding control signal line includes encoding control signal 1, encoding control signal 2, encoding control signal 3 three ways altogether, enabling control signal line includes enabling control signal 1, enabling control signal 2, enabling control signal 3 three ways altogether, three eight decoders pass through power output control signal line with eight ways power output is connected, power output control signal line includes power output control signal 1 to power output control signal 8 eight ways altogether.

The A0, A1 and A2 terminals of the three-eight decoder are respectively and correspondingly connected with the coding control signal 1, the coding control signal 2 and the coding control signal 3, the E1, E2 and E3 terminals of the three-eight decoder are respectively and correspondingly connected with the enabling control signal 1, the enabling control signal 2 and the enabling control signal 3, the enabling control signal is controlled by a switch tube, and 8 terminals of the three-eight decoder, namely Y0 to Y7, are respectively and correspondingly connected to all the power output control signals through eight power output control signals, namely the power output control signal 1 to the power output control signal 8.

The power output comprises eight paths, each path of output can be the same or different and is controlled by the upper computer and the three-eight decoder, each path of output comprises a power chip, a power module, a switching transistor and a resistance-capacitance element or a conventional universal power output assembly, and a control signal is amplified by the operational amplifier chip and then distributed to each path of output.

The utility model has the advantages that: the utility model discloses compare in traditional control scheme, the advantage that this scheme has is control simplification, needn't entangle in the complicated logic control of multichannel signal output precedence order, needn't worry the output conflict, needn't worry about closing another way output earlier before opening a certain way control, because the output result is exactly the mutex originally, another advantage is the IO resource that can effectively practice thrift MCU.

Drawings

Fig. 1 is a schematic block diagram of the circuit structure of the present invention;

FIG. 2 is a schematic diagram of the control circuit of the present invention;

fig. 3 is a schematic diagram of the power output principle of the present invention.

Detailed Description

As shown in fig. 1 to 3, a power supply device using circuit mutual exclusion control includes an upper computer (micro control processor), three-eight decoders, and a power supply output, where the power supply output includes eight paths, the upper computer is connected to the three-eight decoders through a coding control signal line and an enable control signal line, the coding control signal line includes three paths of

coding control signals

1, 2, and 3, the enable control signal line includes three paths of enabling

control signals

1, 2, and 3, the three-eight decoders are connected to the eight paths of power supply output through a power supply output control signal line, and the power supply output control signal line includes eight paths of power supply output control signals 1 to 8.

In this example, the actual operation was carried out as follows:

1. the upper computer and the micro-control processor part; namely a visual interface or a singlechip-a core brain of hardware, can realize the autonomous control of the system and can also be manually controlled;

2. a three-eight decoder part: namely hardware decoding, controlled by a single chip microcomputer or some conditions of other hardware;

3. enable three eight decoders: when E1 and E2 are in a state that the low level E3 is the high level, the chip U0802 is enabled to work in a normal working state, and the 3 pins can be directly handed to an upper computer or a singlechip for direct control or controlled by other signals of other external circuits;

4. and (3) encoding: the high-low states of 3 chip shunt output control signals A0, A1 and A2 are changed through output signals of an upper computer or an MCU (microprogrammed control Unit), which one of the rear-end 8-path control signals is determined, and only one signal is high level, so that the only output of a rear circuit power supply is realized.

The scheme has the following beneficial effects:

1. saving single chip resources: the method is most obvious when the IO port resource of the single chip microcomputer is insufficient, and the output of 8 paths of different power supplies can be controlled by at least 4 control signals;

2. and (4) mutually exclusive output results: 8 paths of output at the rear end of the three-eight decoder are available at the same time, and only one path of output is effective, so that power output conflict can be effectively prevented, and a power supply or equipment can be prevented from being burnt by power-on conflict of a system;

3. the structure is flexible: when other conditions are needed to be added to determine whether a power supply needs to be output, the control signal 2 of the chip of the three-eight decoder can be externally connected to the control signal to serve as an enabling signal, so that the control signal becomes a sufficient condition for enabling the three-eight decoder, the chip can normally work if the condition is met, the chip does not work if the condition is not met, even if the single chip microcomputer is controlled, the output safety is improved, and the reliability of the system is improved;

the three-eight decoder CD74HC238PWR in the present embodiment can be replaced by various other three-eight decoders, such as: 74LS138,74HS138, etc., all achieve the three advantages of the third section of this document and are not limited to this version of the three eight decoder.

Claims

1. A power supply device adopting mutual exclusion control of circuits is characterized in that: it includes host computer, three eight decoders, power output includes eight ways, the host computer pass through encoding control signal line, enable control signal line with three eight decoders are connected, encoding control signal line includes encoding control signal 1, encoding control signal 2, encoding control signal 3 totally three ways, enable control signal line includes enabling control signal 1, enabling control signal 2, enabling control signal 3 totally three ways, three eight decoders pass through power output control signal line with eight ways power output is connected, power output control signal line includes power output control signal 1 to power output control signal 8 totally eight ways.

2. The power supply apparatus with mutual exclusion control of circuit as claimed in claim 1, wherein: the A0, A1 and A2 terminals of the three-eight decoder are respectively and correspondingly connected with the coding control signal 1, the coding control signal 2 and the coding control signal 3, the E1, E2 and E3 terminals of the three-eight decoder are respectively and correspondingly connected with the enabling control signal 1, the enabling control signal 2 and the enabling control signal 3, the enabling control signal is controlled by a switch tube, and 8 terminals of the three-eight decoder, namely Y0 to Y7, are respectively and correspondingly connected to all the power output control signals through eight power output control signals, namely the power output control signal 1 to the power output control signal 8.

3. The power supply apparatus with mutual exclusion control of circuit as claimed in claim 1, wherein: the power output comprises eight paths, each path of output can be the same or different and is controlled by the upper computer and the three-eight decoder, each path of output comprises a power chip, a power module, a switching transistor and a resistance-capacitance element or a conventional universal power output assembly, and a control signal is amplified by the operational amplifier chip and then distributed to each path of output.