CN114647210A - A Discrete Output Multiplexing Circuit Method - Google Patents

Abstract

The invention discloses a discrete magnitude output multiplexing circuit method, and relates to a discrete magnitude signal processing technology. The discrete magnitude output multiplexing circuit method is used for solving the problems that the existing discrete magnitude signal processing technology is complex in interface circuit, more in auxiliary circuit and more in component using quantity, and the product is large in size and heavy in weight. The control unit comprises a driving circuit and a control unit connected with the input end of the driving circuit, wherein the output end of the driving circuit is connected with a controlled switch; the type of the discrete quantity is coded in a mode of different frequencies or duty ratios through the control unit, a periodic pulse signal is output, the periodic pulse signal output by the control unit is received through the driving circuit, the on-off of the controlled switch is controlled to achieve the output of the discrete quantity, and therefore the multiplexing circuit of various discrete quantities outputs different signals.

Description

A Discrete Output Multiplexing Circuit Method

technical field

The invention relates to a discrete signal processing technology, in particular to a discrete output multiplexing circuit method.

Background technique

In modern electronic control systems, discrete technology has been widely used in a large number of indicator lights, switch valve status, position detection status and motor rotation and so on.

At present, in the field of electronic control, the output-type discrete processing method is mainly realized by discrete devices, the interface circuit is complex, the auxiliary circuit is many, and the number of components used is large, resulting in large volume and heavy weight of the product.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a discrete output multiplexing circuit method, which is used to solve the problem that the existing discrete signal processing technology has complex interface circuits, many auxiliary circuits, and a large number of components used, resulting in large product volume, weight problem.

In order to achieve the above object, the present invention adopts the following technical solutions:

A discrete output multiplexing circuit method,

comprising a drive circuit and a control unit connected to an input end of the drive circuit, the output end of the drive circuit being connected to a controlled switch;

The types of discrete quantities are encoded by the control unit in different frequencies or duty cycles, and periodic pulse signals are output,

The drive circuit receives the periodic pulse signal output by the control unit, and controls the on and off of the controlled switch to realize discrete output, thereby realizing multiple discrete multiplexing circuits to output different signals.

On the basis of the above scheme and as a preferred scheme of the above scheme: the control unit is one of a digital signal processor DSP, a single chip MCU, a programmable logic device CPLD/FPGA and a RISC microprocessor ARM.

On the basis of the above scheme and as a preferred scheme of the above scheme: the control unit is a digital signal processor DSP.

On the basis of the above scheme and as a preferred scheme of the above scheme: the drive circuit controls the on and off of the controlled switch by amplifying the power of the periodic pulse signal output by the control unit.

On the basis of the above scheme and as a preferred scheme of the above scheme: the controlled switch controls the on and off of both ends of A and B.

On the basis of the above scheme and as a preferred scheme of the above scheme: it is applied to the output signal circuit of the proximity switch.

The beneficial effects of the present invention are:

The discrete-quantity output multiplexing circuit method of the present invention realizes the functions of multiple discrete-quantity multiplexing circuits outputting different signals. The single-port multiplexing technology is adopted to reduce the complexity of the interface circuit, reduce the consumption of components, save the PCB layout, improve the reliability of the circuit, and reduce the volume and weight of the product.

Description of drawings

1 is a schematic diagram of a discrete output multiplexing circuit of the present invention;

FIG. 2 is a diagram of discrete frequency signals of the present invention.

In the picture:

control unit-1;

drive circuit-2;

Controlled switch-3.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Referring to Figure 1-2, a discrete output multiplexing circuit method, the discrete output multiplexing circuit method realizes the functions of multiple discrete multiplexing circuits outputting different signals. The single-port multiplexing technology is adopted to reduce the complexity of the interface circuit, reduce the consumption of components, save the PCB layout, improve the reliability of the circuit, and reduce the volume and weight of the product.

details as follows:

A discrete output multiplexing circuit method, comprising a drive circuit 1 and a control unit connected to the input end of the drive circuit 2, the output end of the drive circuit is connected to the controlled switch 3; The method encodes the type of discrete quantity, and outputs periodic pulse signal, receives the periodic pulse signal output from the control unit through the drive circuit, and controls the on and off of the controlled switch to realize the output of discrete quantity, thereby realizing a variety of discrete quantities. The quantity multiplexing circuit outputs different signals, thereby realizing the single-port multiplexing technology, reducing the complexity of the interface circuit, reducing the consumption of components, saving the PCB layout, improving the reliability of the circuit, and reducing the size and weight of the product. The control switch has A and B connection sections, and the control switch controls the conduction and disconnection of both ends of A and B. The control unit can choose one of digital signal processor DSP, single chip MCU, programmable logic device CPLD/FPGA or RISC microprocessor ARM. Digital signal processor DSP can be divided into programmable and non-programmable two categories according to its programmability. It has strong selectivity, good performance and low price, so it is best to choose digital signal processor DSP as the control unit. After receiving the discrete signal, the control unit compiles it into two periodic pulse signals of different frequencies or duty ratios and outputs it to the driving circuit, and the driving circuit amplifies the power of the periodic pulse signal output by the control unit to control the controlled switch on and off.

The discrete output multiplexing circuit method of the present invention does not require too many complex interface circuits and auxiliary circuits, thereby effectively reducing the number of components used, optimizing product form, reducing product volume and weight, ensuring product effectiveness, and improving product reliability. .

The discrete output multiplexing circuit method of the present invention includes, but is not limited to, can be applied to output signal circuits of proximity switches (for example, can also be applied to other sensor products including photoelectric sensors).

details as follows:

The signal acquisition device of the proximity switch is connected to the control unit 1 in the present invention, and the control unit 1 can compile and output the discrete signal collected by the above signal acquisition device.

The working process is as follows: using the discrete output multiplexing circuit method, the control unit 1 encodes and outputs a periodic pulse signal, and the drive circuit controls the on and off of the controlled switch to realize the discrete output. As shown in Figure 2, when the output frequency signal is 50HZ, the proximity switch is in the close state, when the frequency is 100HZ, the proximity switch is in the far state, or when the output signal duty cycle is 40%, the proximity switch is in the close state, and the output signal is in the duty cycle of 60%. In the remote state, other duty cycle signals are in the fault state, realizing the technology of multiple discrete multiplexing circuit outputs.

Compared with the prior art: the existing proximity switch output signal circuit needs to use multiple ports, at least one port is required to detect position information, and one port is required to detect faults. The present invention can improve the proximity switch, reduce the number of ports, and reduce the cost of The number of devices used can optimize PCB layout, reduce product size, and optimize product quality.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (6)

1. a discrete output multiplexing circuit method is characterized in that: comprising a drive circuit (1) and a control unit connected to an input end of the drive circuit (2), the output end of the drive circuit being connected to a controlled switch (3); The types of discrete quantities are encoded by the control unit in different frequencies or duty cycles, and periodic pulse signals are output, The drive circuit receives the periodic pulse signal output by the control unit, and controls the on and off of the controlled switch to realize discrete output, thereby realizing multiple discrete multiplexing circuits to output different signals. 2. discrete output multiplexing circuit method according to claim 1, is characterized in that: described control unit is digital signal processor DSP, one-chip computer MCU, programmable logic device CPLD/FPGA and RISC microprocessor in ARM. A sort of. 3 . The discrete output multiplexing circuit method according to claim 2 , wherein the control unit is a digital signal processor DSP. 4 . 4 . The method of claim 1 , wherein the drive circuit controls the on and off of the controlled switch by amplifying the power of the periodic pulse signal output by the control unit. 5 . 5 . The discrete output multiplexing circuit method according to claim 1 , wherein the controlled switch controls the on and off of both ends of A and B. 6 . 6 . The discrete output multiplexing circuit method according to claim 1 , wherein: it is applied to the output signal circuit of the proximity switch. 7 .

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