Periodic signal enhancement detection device and method

A periodic signal and detection device technology, applied in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as the universal detection limitation of actual periodic signals, and the difficulty of automatic and intelligent adjustment of detection circuit system parameters. , to achieve the effect of easy to achieve mass production, easy to understand, and good detection effect

Inactive Publication Date: 2014-03-19
UNIV OF SCI & TECH OF CHINA
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem of this type of technology is that the parameter adjustment of the detection circuit system is not easy to realize automation and intelligence, so there are often great restrictions on the universal detection of actual periodic signals
[0005] It can be seen from the above

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Periodic signal enhancement detection device and method
  • Periodic signal enhancement detection device and method
  • Periodic signal enhancement detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example one

[0032] According to the above invention and the attached figure 1 A structural diagram of a periodic signal enhancement detection device of, which specifically includes a receiving and preprocessing module 1-1, a power amplifier 1-2, a vibration exciter 1-3, a three-stable cantilever beam physical device 1-4, and a laser displacement sensor 1-5, acceleration sensor 1-6, oscilloscope 1-7. The output interface of the signal receiving and preprocessing module 1-1 is connected to the input interface of the power amplifier 1-2; the output interface of the power amplifier 1-2 is connected to the input interface of the exciter 1-3; the three-stable cantilever beam physical device 1 -4 is connected to the worktable of the exciter 1-3 by bolts; the laser displacement sensor 1-5 is installed on a suitable bracket to ensure that the laser beam is aligned with the three-stable cantilever beam physical device 1-4 cantilever beam free vibration End; the acceleration senso...

Example Embodiment

[0035] Example two

[0036] According to the attached image 3 A flow chart of a periodic signal enhanced detection technique in which the specific execution process of the periodic signal enhanced detection method specifically includes the following steps.

[0037] Step 1: For the collected periodic signal containing noise, if there is a phenomenon that the periodic signal to be detected modulates other high-frequency components, the signal needs to be demodulated first, and then scaled conversion is performed according to the range of the period to get preprocessed signal of;

[0038] Step 2: Input the preprocessed signal into the power amplifier, and input the amplified signal into the vibration exciter to realize the conversion from electrical signal to mechanical vibration;

[0039] Step 3: The three-stable cantilever beam physical device installed on the vibration exciter enhances the periodic components in the mechanical vibration;

[0040] Step 4: Collect and record the input a...

Example Embodiment

[0045] Example three

[0046] In order to understand the technical solutions and effects of the present invention more clearly, a detailed description will be given below in conjunction with a specific embodiment. according to figure 1 An experimental platform was built, and the signal used for the example test was a rotating machinery fault simulation signal. The signal was composed of periodic unilateral attenuated pulses and additive white Gaussian noise. The frequency of fault pulses was 8.8 Hz.

[0047] First, according to image 3 Step one: Use Hilbert transform method to demodulate the fault signal. Because the fault frequency of 8.8 Hz is within the effective working range of the signal enhancement detection device, X=1 is selected, that is, the signal is played at the original speed.

[0048] Subsequently, according to image 3 Step 2: Input the demodulated fault signal into the power amplifier, and the output signal of the power amplifier drives the electromagnetic exciter...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a periodic signal enhancement detection device and method. The detection device comprises a signal receiving and preprocessing module, a power amplifier, a vibration exciter, a three-steady cantilever beam physical device, a laser displacement sensor, an acceleration sensor and an oscilloscope, wherein an output interface of the signal receiving and preprocessing module is connected with an input interface of the power amplifier; an output interface of the power amplifier is connected with an input interface of the vibration exciter; the three-steady cantilever beam physical device is connected with the working platform of the vibration exciter through bolts; the laser displacement sensor is arranged on a proper stand so as to ensure that a laser beam is aligned with the free vibration end of a cantilever beam in the three-steady cantilever beam physical device; the acceleration sensor is connected onto the three-steady cantilever beam physical device through bolts; output interfaces of the laser displacement sensor and the acceleration sensor are respectively connected onto two different input channels of the oscilloscope. The detection device and method have the advantages of being simple in principle, physical in realization, good in detection effect, strong in universality and the like.

Description

technical field [0001] The invention relates to the technical field of weak signal detection, in particular to a device and method for enhancing detection of periodic signals. Background technique [0002] There are some periodic signals in engineering, such as vibration or sound signals generated by rotating equipment, EEG or ECG signals generated in the human body, ultrasonic detection signals in underwater or structures, etc. These periodic signals carry very useful signal source information, so it is very important to be able to accurately and effectively detect periodic signals. Specifically, the fault detection and diagnosis technology of rotating mechanical equipment can obtain the operating status and health information of the equipment by analyzing the collected vibration or acoustic signals. When rotating equipment fails, it will generate periodic shock vibrations, which are reflected in the collected vibration or acoustic signals. Through the detection of the im...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01H17/00
Inventor 何清波陆思良孔凡让
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products