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Wireless monitoring system and method for modal parameter of blade of fan

A modal parameter, fan blade technology, applied in the testing of mechanical components, the testing of machine/structural components, signal transmission systems, etc. Monitors the effect of low power consumption, long service life, and simple installation

Active Publication Date: 2013-04-24
GUODIAN UNITED POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former can only be tested in the experimental environment, and the modal test under working conditions cannot be realized; the latter needs to shut down the fan, and it is inconvenient to carry out long-term monitoring
[0004] It can be seen that the existing instruments and methods for testing blade modal parameters have obvious deficiencies and defects in structure and use, and need to be further improved. A wireless monitoring system and method for real-time measurement of parameters is one of the important topics of current research and development.

Method used

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  • Wireless monitoring system and method for modal parameter of blade of fan
  • Wireless monitoring system and method for modal parameter of blade of fan
  • Wireless monitoring system and method for modal parameter of blade of fan

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Experimental program
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Embodiment 1

[0056] see Figure 5 As shown, an embodiment of the sensor of the present invention, the sensor of this embodiment adopts the CC2530 radio frequency single-chip microcomputer produced by Texas Instruments, and this chip integrates an 8051 single-chip microcomputer, AD digital-to-analog conversion module and ZigBee module.

[0057] The signal conditioning circuit adopts the LTC2053 operational amplifier, defines the amplification factor of the signal amplification circuit according to the quantitative relationship of its analog-to-digital conversion, and connects the amplified vibration acceleration analog signal to the CC2530 RF single-chip microcomputer, and its built-in 8051 single-chip microcomputer synchronously samples the 3-way vibration signal And AD conversion, the sampling frequency is 100Hz.

[0058] The power amplifier circuit is connected to the RF output pin of the CC2530 single-chip microcomputer, and the transceiver conversion circuit controls the transmit gain ...

Embodiment 2

[0061] see Image 6 As shown, an embodiment of the coordinator of the present invention, the coordinator adopts CC2530 single-chip microcomputer as the core unit. The ZigBee module is the same as the sensor. The MC34063 power module is used to convert the 24V DC power from the pitch control cabinet into a 3.3V power supply for CC2530.

[0062] The CP2101 chip is the core unit of the serial communication module, which is used to realize the serial communication and read the main control information of the fan. The built-in 8051 MCU of CC2530 controls the data, the IO port stores data to the SD card storage device, and the 8051 regularly starts the GPRS module to read the data in the SD card and perform remote data communication.

[0063] A wireless monitoring method for fan blade modal parameters of the present invention, the specific steps are:

[0064] A. By installing sensors that meet the modal test requirements on the blade, a wireless sensor network is formed, and the v...

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Abstract

The invention relates to a wireless monitoring system and method for a modal parameter of a blade of a fan. The method comprises the following steps of: A, collecting a vibration acceleration signal of a blade according to periods; B, processing the signal collected in the step A to obtain a digital signal; C, processing the digital signal obtained in the step B to obtain the modal parameter of the blade, and meanwhile, reading the air speed of the fan and variable pitch data; D, storing the data obtained in the step C, and transmitting the data to a remote analysis terminal; and E, carrying out analytical calculation on the data to obtain the inherent frequency and vibration mode of the blade. The system comprises a coordinator and more than one sensor fixedly arranged on the blade. By using the wireless monitoring system for the modal parameter of the blade of the fan, provided by the invention, the real-time modal parameter of the blade of the fan can be obtained through monitoring the vibration of the blade; the monitoring method and a mounting way are simple; no strain gauge is used, and correction on a result is not needed; and the test process is independent from the operation process of the fan, therefore, stopping of the fan is not needed.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wireless monitoring system and method for modal parameters of fan blades. Background technique [0002] The fan unit is a large-scale electrical equipment that converts wind energy into electrical energy, and the blades are the main components of the fan unit to capture wind energy. The fan unit must withstand a wide range of load fluctuations during operation. The blades of the horizontal axis fan unit made of composite materials will change during the long-term operation of the fan unit, so that the wind capture capacity of the fan unit will decrease, power loss and blade breakage will occur, causing huge damage. Economic losses. If the mechanical characteristics of the blade can be monitored, the working characteristics of the blade can be evaluated in real time through the modal parameters, and the fatigue damage of the blade can be avoided. [0003] At pres...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01H11/06G08C17/02
Inventor 于迟董礼王千王海龙
Owner GUODIAN UNITED POWER TECH
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