Bridge pier vibration measurement system
A vibration measurement and pier technology, applied in the detection field, can solve the problems of inconvenient measurement work, inconvenient field operation, large volume, etc., and achieve good measurement analysis, convenient field operation, and small size.
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Embodiment 1
[0020] Referring to the accompanying drawings, a bridge pier vibration measurement system includes an ultra-low frequency absolute vibration displacement measurement sensor, a signal conditioning circuit unit, a single-chip microcomputer, a USB controller and a notebook computer.
[0021] The ultra-low frequency absolute vibration displacement measurement sensor is used to collect vibration signals of the bridge, and is preferably installed at the top of the bridge pier and in the middle of the bridge between the two piers, and its installation direction is perpendicular to the direction of vehicle movement, that is, perpendicular to the direction of the bridge.
[0022] The signal conditioning circuit unit is used to perform signal amplification, filtering and other conditioning on the signal collected by the ultra-low frequency absolute vibration displacement measurement sensor, and transmit the conditioned signal to the single-chip microcomputer.
[0023] The single-chip mic...
Embodiment 2
[0030] This embodiment introduces the communication work between the CygnalF005 single-chip microcomputer system and the host through the USB controller (PDIUSBD12).
[0031] In actual development, two transmission methods, control transfer and block transfer, are used. Control transfer is used to implement various control operations on the device by the USB bus driver (USBD.SYS) located on the host computer and the written function driver, while block transfer It is used to transfer the collected data from the device to the host. When the USB controller detects a transmission request initiated by the host computer from the USB bus, the USB controller notifies the CygnalF005 microcontroller system of this request through an interrupt. The CygnalF005 single-chip microcomputer system obtains various parameters related to this transmission by accessing the status register and data register of the USB controller, and performs corresponding operations on the control register and da...
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