Multi-channel strain signal synchronous collection system and method

A signal synchronization and acquisition system technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as high cost, complex circuits, and large physical size

Pending Publication Date: 2019-07-19
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of complex circuit, high cost and large physical size of traditional multi-channel strain signal synchronous acquisition device, the

Method used

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  • Multi-channel strain signal synchronous collection system and method
  • Multi-channel strain signal synchronous collection system and method

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specific Embodiment 1

[0075] This embodiment is an embodiment of a multi-channel strain signal synchronous acquisition system.

[0076] The multi-channel strain signal synchronous acquisition system of this embodiment, such as figure 2 As shown, the multi-channel strain signal synchronous acquisition system includes a voltage reference ratio conversion circuit, a program-controlled setting module, a drive circuit, a Wheatstone strain bridge, an amplifier circuit, an anti-aliasing filter circuit, an A / D synchronous acquisition circuit, an isolation modules and microprocessor systems;

[0077] The voltage of the voltage reference proportional conversion circuit is provided to the drive circuit through the program-controlled setting module, and the drive circuit drives the Wheatstone strain bridge to amplify and filter the strain signal through the amplification circuit and anti-aliasing filter circuit, and then through the A / D synchronous acquisition circuit Convert the analog signal into a digital...

specific Embodiment 2

[0082] This embodiment is an embodiment of a multi-channel strain signal synchronous acquisition system.

[0083] The multi-channel strain signal synchronous acquisition system of this embodiment, on the basis of the specific embodiment 1, further defines that the voltage reference ratio conversion circuit includes a voltage reference, a noise reduction filter circuit and a logic circuit, such as image 3 shown;

[0084] The voltage reference adopts ADR02, ADR4550, REF5050 or other compatible reference chips;

[0085] The noise reduction filter circuit outputs a 5V reference voltage by performing noise reduction filtering on the voltage reference;

[0086] The logic circuit includes a U3 chip, a U4 chip, a U5 chip and a 3×8 resistor network; the U3 chip, the U4 chip and the U5 chip are operational amplifier chips, and OPA2277, AD706 or other precision double operational amplifier chips with similar performance are selected , the non-inverting input terminal of U3 chip-B is c...

specific Embodiment 3

[0088] This embodiment is an embodiment of a multi-channel strain signal synchronous acquisition system.

[0089] The multi-channel strain signal synchronous acquisition system of this embodiment, on the basis of the specific embodiment 1, further defines that the drive circuit and the Wheatstone strain bridge constitute the Wheatstone strain bridge drive circuit, as Figure 4 As shown, as follows:

[0090] It includes a dual four-selection analog switch U1i chip, the X0 port of the U1i chip is connected to AGND, the X1 port is connected to VP1, the X2 port is connected to VP2, the X3 port is connected to VP4, the Y0 port is connected to AGND, the Y1 port is connected to VN1, and the Y2 port is connected to VN2. The Y3 port is connected to VN4, the X port is connected to the non-inverting input terminal of U2i chip-A, and the Y port is connected to the non-inverting input terminal of U2i chip-B. The A port is defined as SETAi, and the B port is defined as SETBi. The A port and...

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Abstract

The invention provides a multi-channel strain signal synchronous collection system and method, and belongs to the field of electronic technology measurement; the system comprises a voltage reference proportion transformation circuit, a program control setting module, a driving circuit, a Wheatstone strain bridge, an amplifying circuit, an anti-aliasing filter circuit, an A/D synchronous collectioncircuit, an isolation module and a microprocessor system; the voltage of the voltage reference proportion transformation circuit is provided for the driving circuit by the program control setting module, the driving circuit drives the Wheatstone strain bridge to amplify and filter a strain signal through the amplifying circuit and the anti-aliasing filter circuit, an analog signal is converted into a digital signal through the A/D synchronous collection circuit and digital isolation, and finally the digital signal is transmitted to the microprocessor system through an SPI interface for processing; and the multi-channel strain signal driving circuit and A/D analog-to-digital synchronous conversion architecture proposed by the invention neither requires the electrical isolation between channels nor a plurality of analog-to-digital conversion chips, and requires no expanded conversion data storage and transmission circuitry, thereby reducing the size and reducing the cost.

Description

technical field [0001] The invention discloses a multi-channel strain signal synchronous acquisition system and method, belonging to the field of electronic technology measurement. Background technique [0002] In production, life and scientific research, it is often necessary to measure physical parameters such as weight, pressure, and vibration in real time, and to collect multi-point real-time information synchronously for time domain and frequency domain analysis of measurements or signals, such as the monitoring of large bridges , It is necessary to collect multi-point vibration signals at the same time to analyze the distribution of traffic flow, the resonance frequency of bridges, and the monitoring of buildings is the same. It is necessary to monitor its vibration and analyze its physical characteristics. [0003] Traditional multi-channel strain signal synchronous acquisition devices such as figure 1 shown, from figure 1 It can be seen from the figure that due to ...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24215
Inventor 童子权杨青云任丽军纪铁军单冬梅余皓明
Owner HARBIN UNIV OF SCI & TECH
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