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Vibration signal conditioning and data converter

A technology of data converters and vibration signals, applied in analog/digital conversion, code conversion, physical parameter compensation/prevention, etc., can solve problems such as prevention before they happen, to ensure safe operation, fast and accurate accident hidden dangers, and reduce failure rate Effect

Pending Publication Date: 2019-03-08
江苏华创光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing technology does not have a technical solution that can uniformly detect, acquire, monitor and adjust different types of vibration signals, and it is impossible to prevent it before it happens. Therefore, a new technical solution is needed to solve this problem

Method used

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  • Vibration signal conditioning and data converter
  • Vibration signal conditioning and data converter
  • Vibration signal conditioning and data converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the present embodiment provides a vibration signal conditioning and data converter, including a piezoelectric acceleration sensor 1 with an IEPE built-in charge amplifier, a vibration detection circuit module 2 and a digital circuit module 3, and the vibration detection circuit module 2 includes sequentially connected Constant current source circuit 4, input amplifier 5, program-controlled amplifier 6, output amplifier 7, integrator 8, analog switch 9, anti-aliasing filter 10 and ADC analog-to-digital converter 11, and the digital circuit module 3 is connected through a 3-bit control line Next to the program-controlled amplifier 6, the digital circuit module 3 is connected to the analog switch 9 through a 2-bit control line, the digital circuit module 3 is connected to the anti-aliasing filter 10, and the cut-off frequency control for the anti-aliasing filter 10 is realized through the PWM signal, and the digital The circuit module 3 is connec...

Embodiment 2

[0037] The constant current source circuit 4 is used to provide a constant drive current for the piezoelectric acceleration sensor 1, because the constant drive current is easily affected by the temperature coefficient, and a static DC bias voltage will be generated on the signal line of the piezoelectric acceleration sensor 1, because This voltage is not an effective vibration signal, so it will affect the measurement accuracy of the vibration signal of the piezoelectric acceleration sensor 1 .

[0038] In order to ensure the stability of the constant driving current and the measurement accuracy of the piezoelectric acceleration sensor 1, as figure 2 As shown, the constant current source circuit 4 includes two parts: a temperature compensation circuit and a bias isolation circuit.

[0039] The temperature compensation circuit includes a resistor R1, a resistor R2, a diode D1, a diode D2 and a constant current source chip Q1. The constant current source chip Q1 is provided wi...

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Abstract

The invention discloses a vibration signal conditioning and data converter which comprises an accelerometer vibration sensor, a vibration detection circuit module and a digital circuit module. The vibration detection circuit module comprises a constant current source circuit, an input amplifier, a program control amplifier, an output amplifier, an integrator, an analog switch, an anti-aliasing filter and an ADC connected successively, the acceleration vibration sensor is connected with the constant current source circuit and the input amplifier, and the digital circuit module is connected withthe program control amplifier, the analog switch, the anti-aliasing filter and the ADC. Thus, vibration acceleration, speed and displacement signals can be converted flexibly, corresponding conversion can be carried out according to different vibration signal expression manners of monitoring points, the vibration monitoring requirement of a wind turbine generator system shafting can be met. and data support is provided for state monitoring of the whole wind turbine generator system.

Description

technical field [0001] The invention belongs to the technical field of electrical automation, and in particular relates to a vibration signal conditioning and data converter applied to a wind power generator. Background technique [0002] The main components of wind turbines are expensive and difficult to replace. If the technology of condition monitoring and fault early warning is adopted reasonably, real-time state detection and intelligent fault early warning technology can effectively detect potential accidents and realize fast and accurate system maintenance to ensure the safe operation of the unit. To take precautions before they happen will greatly reduce the failure rate of wind turbines, effectively reduce maintenance costs, improve the competitiveness of wind power, and promote the leapfrog development of the wind energy industry. [0003] Vibration monitoring of wind turbine shafting is an important part of wind turbine condition monitoring, and obtaining real and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/08H03M1/06
CPCH03M1/0629G01H11/08
Inventor 杨川
Owner 江苏华创光电科技有限公司
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