Low-frequency vibration sensor based on micro-pixel centroid positioning and working method thereof
A vibration sensor and low-frequency vibration technology, applied in the field of sensors, can solve the problems of low measurement accuracy of low-frequency sensors, achieve the effects of reducing errors, avoiding axial torsion, and ensuring linearity
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Embodiment 1
[0038] An embodiment of the present invention, such as Figure 1 to Figure 3 As shown, a low-frequency vibration sensor (hereinafter referred to as "vibration sensor") based on centroid positioning of micro-pixels is disclosed, which includes a vibration signal coupling component, a vibration signal measuring optical path and a vibration system damping component. Among them, the vibration signal coupling component includes a single pendulum, the vibration signal coupling component can couple the vibration sensor with the ground, and transmit the ground vibration signal to the inside of the vibration sensor to cause the swing of the single pendulum; the vibration system damping component is connected to the single pendulum, which is a single pendulum. The pendulum provides damping. By adjusting the damping size, the consistency between the swing of the pendulum and the ground vibration signal is ensured, thereby ensuring the linearity of the sensor; the vibration signal measurem...
Embodiment 2
[0069] An embodiment of the present invention discloses the working method of the low-frequency vibration sensor based on micro-pixel centroid positioning of Embodiment 1, including the following steps:
[0070] Step 1: The tail vertebra 1 is buried underground and tightly coupled with the structure to be tested.
[0071] In this embodiment, the caudal vertebra 1 adopts a threaded structure to ensure the coupling tightness after being buried. The vibration sensor is connected to the caudal vertebra 1 through the caudal vertebra mounting frame 2, and the caudal vertebra mounting frame 2 and the caudal vertebra 1 are designed as separate parts to ensure the convenience of disassembly and movement of the vibration sensor.
[0072] Step 2: The ground vibration wave causes the pendulum inside the vibration sensor to vibrate.
[0073] A swing cone 8 is installed at the tail end of the single swing, and the swing cone 8 is immersed in a damping liquid pool 3 containing damping liqui...
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