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
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[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...
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