CN205594617U - Fault -signal detecting system based on computer - Google Patents

Abstract

The utility model relates to a detection system, more specifically to a computer-based fault signal detection system, which can reduce interference sources, suppress coupling channels, weaken circuit interference to data channels, and have good signal transmission stability. The acquisition terminal is used to collect the fault signal and convert the collected signal into a data signal, the current signal conversion module is used to convert the data signal into a stable current signal, and the optocoupler isolation chip is used to isolate and transmit the current signal and convert the current signal It is output as a voltage signal. The single-chip microcomputer is used for signal calculation and judgment. The computer is used for further processing and display of the signal and provides a download and debugging terminal for the single chip microcomputer. The AC voltage stabilizer is used to convert the AC output of the power supply into DC and output a stable DC voltage. The filter module is used to suppress high-frequency clutter interference in the circuit. The step-down regulator module is used to step down and stabilize the voltage and output Voltages of different sizes to match the power requirements of the underlying devices.

Description

A computer-based fault signal detection system

technical field

The utility model relates to a detection system, in particular to a computer-based fault signal detection system.

Background technique

Generally, the interference in the detection system mainly comes from: power supply interference, signal channel interference and space radiation interference. As for the fault signal, the signal is weak and susceptible to signal channel interference and power interference. Once the interference enters the analog signal input channel of the system and is superimposed on the useful signal, the data acquisition error will increase, especially for the weak signal output by the fault signal, the impact will be more serious. In addition, in the mains power supply network in use, many high-voltage spike pulse signals are superimposed on the normal 50Hz sine wave, and these signals will seriously affect the normal operation of the system and cause great interference to the fault signal.

Contents of the invention

The technical problem mainly solved by the utility model is to provide a computer-based fault signal detection system, which can reduce interference sources, suppress coupling channels, weaken the interference of circuits to data channels, and have good signal transmission stability.

In order to solve the above technical problems, the utility model relates to a detection system, more specifically to a computer-based fault signal detection system, including an acquisition terminal, a current signal conversion module, an optocoupler isolation chip, an analog-to-digital converter, a single-chip microcomputer , storage module, power supply, AC voltage stabilizer, filter module, step-down regulator module, RS232 bus and computer, can reduce interference sources, suppress coupling channels, weaken circuit interference to data channels, and have good signal transmission stability.

The input terminal of the current signal conversion module is connected to the output terminal of the acquisition terminal, and the output terminal of the current signal conversion module is connected to the input terminal of the optocoupler isolation chip. The acquisition terminal is used for collecting fault signals and converting the collected signals into data signals. The signal conversion module is used to convert the data signal into a stable current signal, and the optocoupler isolation chip is used to isolate and transmit the current signal and convert the current signal into a voltage signal for output. The input end of the analog-to-digital converter is connected to the output end of the optocoupler isolation chip, and the output end of the analog-to-digital converter is connected to the single-chip microcomputer. judge. The storage module is connected with the single-chip computer, and the storage module is used for expanding the storage space of the single-chip computer. One end of the RS232 bus is connected to the single-chip computer, and the other end of the RS232 bus is connected to the computer. The RS232 bus is used as a signal transmission matching channel between the single-chip computer and the computer. The computer is used for further processing and display of the signal and provides a download and debugging terminal for the single-chip computer. The input end of the AC voltage stabilizer is connected to the power supply, the output end of the AC voltage stabilizer is connected to the input end of the filter module, the output end of the filter module is connected to the input end of the step-down regulator module, and the AC voltage stabilizer is used to output the power supply The alternating current is converted into direct current and a stable direct current voltage is output. The filter module is used to suppress high-frequency clutter interference in the circuit. The buck regulator module is used to step down and stabilize the voltage and output voltages of different sizes to match the lower-level devices. power supply needs. The acquisition terminal, the current signal conversion module, the optocoupler isolation chip, the analog-to-digital converter and the single-chip microcomputer are all connected to the output terminal of the buck regulator module.

As a further optimization of this scheme, the single-chip microcomputer described in a computer-based fault signal detection system of the present invention is selected from the single-chip microcomputer produced by Shenzhen Hongjing Technology Co., Ltd., and its model is IRC15W415S.

As a further optimization of the program, the utility model is based on the acquisition terminal, current signal conversion module, optocoupler isolation chip, analog-to-digital converter, single-chip microcomputer and step-down voltage stabilization module described in a computer-based fault signal detection system. Circuit connections are made with isolated wires.

The beneficial effects of a computer-based fault signal detection system of the utility model are:

a. Reduce sources of interference;

b. Inhibit the coupling channel;

c. Signal transmission is stable.

Description of drawings

Fig. 1 is a system block diagram of a computer-based fault signal detection system of the present invention.

detailed description

In Fig. 1, the utility model relates to a detection system, more specifically to a computer-based fault signal detection system, including an acquisition terminal, a current signal conversion module, an optocoupler isolation chip, an analog-to-digital converter, a single-chip microcomputer, The storage module, power supply, AC voltage stabilizer, filter module, step-down voltage regulator module, RS232 bus and computer can reduce interference sources, suppress coupling channels, weaken the interference of circuits on data channels, and have good signal transmission stability.

The input terminal of the current signal conversion module is connected to the output terminal of the acquisition terminal, and the output terminal of the current signal conversion module is connected to the input terminal of the optocoupler isolation chip. The acquisition terminal is used for collecting fault signals and converting the collected signals into data signals. The signal conversion module is used to convert the data signal into a stable current signal, and the optocoupler isolation chip is used to isolate and transmit the current signal and convert the current signal into a voltage signal for output. The acquisition end generally uses a sensor for data acquisition and conversion. The collected signal is a data signal, and the data signal is messy and contains many interference signals. The current conversion module is used to filter and shape the signal, and output the converted sine or cosine waveform. for further processing. The optocoupler isolation chip isolates the signal channel of the acquisition end from the microcontroller to reduce interference.

The input end of the analog-to-digital converter is connected to the output end of the optocoupler isolation chip, and the output end of the analog-to-digital converter is connected to the single-chip microcomputer. judge. The storage module is connected with the single-chip computer, and the storage module is used for expanding the storage space of the single-chip computer. The single-chip microcomputer is used to judge the signal of the acquisition terminal to obtain the fault information and upload the fault information to the computer. The single-chip microcomputer is selected from the one-chip microcomputer produced by Shenzhen Hongjing Technology Co., Ltd., and its model is IRC15W415S. This type of microcontroller is easy to get and cheap, and has good versatility. In addition, this type of single-chip microcomputer supports power-down wake-up and can be reset reliably, reducing energy consumption and failure rate.

One end of the RS232 bus is connected to the single-chip computer, and the other end of the RS232 bus is connected to the computer. The RS232 bus is used as a signal transmission matching channel between the single-chip computer and the computer. The computer is used for further processing and display of the signal and provides a download and debugging terminal for the single-chip computer. The computer further filters and shapes the fault signal and displays the signal in the form of a waveform. The computer is also used to debug and change the single-chip microcomputer.

The input end of the AC voltage stabilizer is connected to the power supply, the output end of the AC voltage stabilizer is connected to the input end of the filter module, the output end of the filter module is connected to the input end of the step-down regulator module, and the AC voltage stabilizer is used to output the power supply The alternating current is converted into direct current and a stable direct current voltage is output. The filter module is used to suppress high-frequency clutter interference in the circuit. The buck regulator module is used to step down and stabilize the voltage and output voltages of different sizes to match the lower-level devices. power supply needs. The acquisition end, the current signal conversion module, the optocoupler isolation chip, the analog-to-digital converter and the single-chip microcomputer are all connected to the output end of the step-down voltage stabilization module. The circuit connection between the acquisition terminal, the current signal conversion module, the optocoupler isolation chip, the analog-to-digital converter and the single-chip microcomputer and the step-down regulator module is connected by isolated wires. The isolated wire can isolate the circuit from the signal path, and can also isolate each branch circuit to prevent interference.

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples. Changes, modifications, additions or replacements made by those of ordinary skill in the art within the essential scope of the present utility model also belong to this utility model. Protection scope of utility model.

Claims (3)

1. A computer-based fault signal detection system, including an acquisition terminal, a current signal conversion module, an optocoupler isolation chip, an analog-to-digital converter, a single-chip microcomputer, a storage module, a power supply, an AC voltage stabilizer, a filter module, and a step-down regulator Module, RS232 bus and computer, characterized in that: the input end of the current signal conversion module is connected with the output end of the acquisition end, the output end of the current signal conversion module is connected with the input end of the optocoupler isolation chip, and the acquisition end is used for the collection of fault signals And convert the collected signal into a data signal. The current signal conversion module is used to convert the data signal into a stable current signal. The optocoupler isolation chip is used to isolate and transmit the current signal and convert the current signal into a voltage signal before outputting; The input end of the converter is connected to the output end of the optocoupler isolation chip, the output end of the analog-to-digital converter is connected to the single-chip microcomputer, the analog-to-digital converter is used to convert the analog signal into a digital signal and then output, and the single-chip microcomputer is used for signal calculation and judgment; The storage module is connected with the single-chip computer, and the storage module is used to expand the storage space of the single-chip computer; one end of the RS232 bus is connected with the single-chip computer, and the other end of the RS232 bus is connected with the computer. The RS232 bus is used as a signal transmission matching channel between the single-chip computer and the computer, and the computer is used for signal transmission. Further process and display and provide a download and debugging terminal for the microcontroller; the input terminal of the AC voltage regulator is connected to the power supply, the output terminal of the AC voltage regulator is connected to the input terminal of the filter module, and the output terminal of the filter module is connected to the step-down regulator module The AC voltage stabilizer is used to convert the AC output of the power supply into DC and output a stable DC voltage. The filter module is used to suppress high-frequency clutter interference in the circuit. The step-down regulator module is used to step down the voltage. Voltage regulation and output voltages of different sizes to match the power supply requirements of lower-level devices; the acquisition terminal, current signal conversion module, optocoupler isolation chip, analog-to-digital converter and single-chip microcomputer are all connected to the output terminal of the step-down regulator module. 2. A computer-based fault signal detection system according to claim 1, wherein the single-chip microcomputer is a single-chip microcomputer produced by Shenzhen Hongjing Technology Co., Ltd., and its model is IRC15W415S. 3. a kind of fault signal detection system based on computer according to claim 1, is characterized in that: described collection terminal, current signal conversion module, optocoupler isolation chip, analog-to-digital converter and single-chip microcomputer and step-down regulator module The circuit connections between are connected by isolated wires.