Low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system and realization method thereof

A channel switching system and active switching technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of unfavorable signal subsequent processing, etc., and achieve the effects of small signal influence, low signal crosstalk, and low crosstalk

Active Publication Date: 2010-10-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the channel switching system, the high-frequency and high-power excitation signal is a strong interference source, which will cause a strong crosstalk signal between the channels inside it, which is not conducive to the subsequent processing of the signal

Method used

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  • Low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system and realization method thereof
  • Low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system and realization method thereof
  • Low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system and realization method thereof

Examples

Experimental program
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Effect test

Embodiment (1

[0032] Such as figure 1 As shown, this embodiment is an external independent instrument type low crosstalk, fast and active-passive compatible piezoelectric channel switching system, including a channel control central processing unit module, an active-passive working mode switching switch array, a passive switching control module, An active switch control module, a passive switch array, an active switch array and a system power conversion module.

[0033] The low-crosstalk, fast and active-passive compatible piezoelectric channel switching system of the external independent instrument type communicates with the computer using the computer's external bus. The amplitude of the excitation signal that the system needs to switch is ±70V, and the current is less than 800mA. The sensor response signal amplitude that the system needs to switch is ±10V, and the current is less than 10mA. The switch array of active and passive working modes, the switches in the active switch array ar...

Embodiment (2

[0084] Such as figure 1 As shown, this embodiment is a board-type low-crosstalk, fast and active-passive compatible piezoelectric channel switching system integrated into a computer, including a channel control central processing unit module, an active-passive working mode switching switch array, and a passive switching system. A control module, an active switch control module, a passive switch array, an active switch array and a system power conversion module.

[0085] The board-type low crosstalk, fast and active-passive compatible piezoelectric channel switching system communicates with the computer using the computer system bus. The amplitude of the excitation signal that the system needs to switch is ±70V, and the current is less than 800mA. The sensor response signal amplitude that the system needs to switch is ±10V, and the current is less than 10mA. All switches inside the system are implemented with miniaturized relays.

[0086] Such as Figure 5 As shown in (b), ...

Embodiment (3

[0095] Such as figure 1 As shown, this embodiment is a board-type low-crosstalk, fast and active-passive compatible piezoelectric channel switching system integrated into a computer, including a channel control central processing unit module, an active-passive working mode switching switch array, and a passive switching system. A control module, an active switch control module, a passive switch array, an active switch array and a system power conversion module.

[0096] The board-type low crosstalk, fast and active-passive compatible piezoelectric channel switching system communicates with the computer using the computer system bus. The amplitude of the excitation signal that the system needs to switch is ±10V, and the current is less than 30mA. The sensor response signal amplitude that the system needs to switch is ±10V, and the current is less than 10mA. All switches inside the system are realized by analog electronic switches.

[0097] The implementation form of the chan...

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Abstract

The invention provides a low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system, which belongs to the technical field of structural health monitoring for an active-passive Lamb wave and a piezoelectric array sensor. The piezoelectric channel switching system comprises a channel control central processor module, an active-passive work mode switch array, a passive switching control module, an active switching control module, a passive switch array, an active switch array and a system power supply conversion module. The system integrates the function of channel switching required by active and passive structural heal monitoring technology. Under the active working mode, the channel switching system can realize the activation of single piezoelectric sensor and low-crosstalk and rapid channel switching and scanning of synchronous response of a plurality of piezoelectric sensors; and under the passive work mode, the channel swtiching system can realize the gating of an acoustic emission response channel of any piezoelectric sensor.

Description

Technical field: [0001] The invention relates to a channel switching system for a structural health monitoring system based on active and passive Lamb wave and piezoelectric array sensor technology. In the active working mode, the multi-channel switching system can realize the excitation of a single piezoelectric sensor and the simultaneous response of multiple piezoelectric sensors with low crosstalk, fast channel switching and scanning. In the passive working mode, the multi-channel switching system can realize the gating of any acoustic emission response channel of the piezoelectric sensor. Background technique: [0002] Structural health monitoring technology is a new concept of intelligent material structure, which uses sensing / driving elements integrated in the structure to obtain information related to the health state of the structure online in real time, so as to achieve the purpose of online structural state assessment. With a series of advantages such as high spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 邱雷袁慎芳张炳良
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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