CN104568118B - A kind of visual mechanical oscillation detecting system - Google Patents

Abstract

The invention discloses a visual mechanical vibration detection system, which is mainly composed of a "vibration camera" acquisition device and a data analysis system. The data obtained by the "vibration camera" acquisition device is transmitted to the data analysis system through the data acquisition card. The "vibration camera" acquisition device includes 25 laser vibration measurement sensors arranged on different radii of the plate and a camera at the center of the plate. The data analysis system includes vibration signal processing software and result imaging software pre-installed in the computer. The invention can quickly and synchronously identify the specific position, intensity and frequency of the mechanical vibration in the measurement area, and has high precision; on the other hand, the information collection system has a small volume and is easy to operate.

Description

A Visual Mechanical Vibration Detection System

technical field

The invention belongs to the field of mechanical vibration measurement, and in particular relates to a visual mechanical vibration detection system.

Background technique

In the development of industry in the world today, more and more attention is paid to the monitoring of mechanical failures. Mechanical failures will produce some physical characteristics such as vibration and noise. These physical characteristics are collected and analyzed by signal collection and processing technologies, so as to monitor the equipment in real time, provide an effective basis for equipment maintenance, improve maintenance efficiency, and save maintenance material and manpower.

Existing technologies include vibration, thermal imaging, ultrasonic, temperature and magnetic flux detection to diagnose the fault status of mechanical and electrical equipment. It is necessary to determine the location and cause of the fault when the equipment is shut down or disassembled. It can more accurately identify the type of mechanical equipment failure.

However, the prior art lacks a visual, vibration monitoring that can quickly obtain a planar vibration location, intensity, and frequency.

Contents of the invention

In order to overcome the shortcomings of the existing technology, the present invention proposes a visual mechanical vibration detection system, including a "vibration camera" acquisition system and a data analysis system, and the "vibration camera" acquisition system and the data analysis system are connected through a data acquisition card , the "vibration camera" acquisition system includes a flat panel, a laser vibration sensor, and a camera, the plurality of laser vibration sensors are located on the panel, the camera is located on the panel, and the laser vibration sensor and the camera pass through The data line is connected to the data acquisition card, and the data analysis system includes vibration signal processing software and result imaging software preinstalled in the computer.

Further, the vibration signal processing software uses time-domain analysis and frequency-domain analysis to analyze the vibration signal to obtain the vibration amplitude and vibration intensity, and the vibration intensity distribution diagram obtained from the vibration intensity values obtained from multiple vibration signals, The result imaging software uses a direct edge detection algorithm to calculate the digital signal to obtain a real-time image of the object to be measured, and the computer displays the result of the vibration characteristics of the object to be measured in real time.

Further, the camera is located in the middle of the plate, and the plurality of laser vibration sensors are evenly distributed around the camera.

Further, the number of the laser vibration sensors is 16-32, which are evenly distributed on the flat plate.

Further, the number of the laser vibration sensors is 25, which are evenly distributed on the flat plate.

Further, a handle is fixed under the flat panel. The signal can be collected by hand.

The beneficial effect of the present invention is that the detection system device of the mechanical vibration can obtain the visualization area where the vibration occurs quickly and in real time, and obtain the vibration intensity and frequency at the same time, so as to provide a basis for analyzing the failure of the equipment.

Description of drawings

Fig. 1 is a schematic flow chart of the present invention.

Fig. 2 is a front view of the vibration collection system device in the present invention.

Fig. 3 is a side view of the "vibration camera" acquisition system device in the present invention.

Fig. 4 is a schematic flow chart of the computer software in the present invention.

In the figure 1. Tablet 2. Laser vibration sensor 3. Camera 4. Handle.

Detailed ways

The technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

This specific embodiment provides a visual mechanical vibration detection system, including a "vibration camera" acquisition system and a data analysis system, the "vibration camera" acquisition system and the data analysis system are connected through a data acquisition card, so The "vibration camera" collection system includes a flat panel 1, a laser vibration sensor 2 and a camera 3, the camera 3 is located in the middle of the flat panel 1, the camera 3 is connected to a data acquisition card by a data line, and the number of the laser vibration sensors 2 is 25, evenly distributed around the camera 3, the laser vibration sensor 2 is connected to a data acquisition card through a data cable, and a handle 4 is fixed under the tablet 1. The data analysis system includes vibration signal processing software and result imaging software preinstalled in the computer. Vibration signal processing software and result imaging software are used to obtain the distribution of vibration intensity on the plane at different frequencies during equipment operation, so as to know the specific location of equipment failure.

When testing the part of the object to be tested, the hand-held board is aimed at the object, and the signals collected by the laser vibration sensor 2 and the camera 3 are transmitted to the computer through the acquisition card, and in the software analysis of the computer, the distribution map showing the vibration characteristics in real time is obtained. . The software steps are as follows: the signal is divided into the vibration signal collected by the vibration sensor and the digital signal obtained by the camera 3. For the vibration signal, the vibration amplitude and vibration intensity are obtained by analyzing the vibration signal by using time domain analysis and frequency domain analysis method. Vibration intensity distribution map obtained from all the vibration intensity values obtained by the laser vibration sensor 2. For the digital signal, the digital signal is calculated by the direct edge detection algorithm to obtain the real-time image of the object to be measured, and finally the result of displaying the vibration characteristics of the object to be measured is obtained in real time.

The working principle is as follows, the data obtained by the "vibration camera" acquisition system is transmitted to the data analysis system through the data acquisition card. The vibration acquisition system includes a laser vibration sensor and a camera arranged on a circular plate. First of all, the flat panel is facing the detected equipment, start the laser vibration sensor and the camera, measure the vibration signal on a plane according to the laser Doppler effect, the camera shoots the detected area in real time, and can record at a frame rate of 30 frames per second image. Use the data acquisition card to obtain the vibration data obtained by laser measurement and the data captured by the camera and transmit them to the computer through the data line, and apply the pre-installed vibration signal processing software and result imaging software in the computer to process the signal to obtain the vibration intensity of the measurement area and frequency, so as to provide a visual basis for analyzing the cause of equipment failure.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (4)

1. A visual mechanical vibration detection system, characterized in that: comprising a "vibration camera" acquisition system and a data analysis system, the "vibration camera" acquisition system and the data analysis system are connected by a data acquisition card, the " The "vibration camera" collection system includes a flat panel (1), a laser vibration sensor (2), and a camera (3). A plurality of the laser vibration sensors (2) are located on the flat panel (1), and the camera (3) is located On the flat panel (1), the laser vibration sensor (2) and the camera (3) are connected to a data acquisition card by a data line, and the data analysis system includes vibration signal processing software and result imaging software in a computer; The vibration signal processing software uses time-domain analysis and frequency-domain analysis methods to analyze the vibration signal to obtain the vibration amplitude and vibration intensity. The vibration intensity distribution map can be obtained for the vibration intensity values obtained from multiple vibration signals. The result imaging software uses direct The edge detection algorithm calculates the digital signal to obtain a real-time image of the object to be measured, and the computer displays the result of the vibration characteristics of the object to be measured in real time; a handle (4) is fixed under the flat panel (1). 2. A visual mechanical vibration detection system according to claim 1, characterized in that: the camera (3) is located in the middle of the flat panel (1), and a plurality of the laser vibration sensors (2) are evenly distributed in the The surroundings of the camera (3). 3. A visual mechanical vibration detection system according to claim 1, characterized in that: the number of the laser vibration sensors (2) is 16-32, which are evenly distributed on the flat plate (1). 4. A visual mechanical vibration detection system according to claim 1, characterized in that: the number of the laser vibration sensors (2) is 25, which are evenly distributed on the flat plate (1).