Mechanical resonance detecting device and method

A technology of mechanical resonance and detection devices, applied in measuring devices, using electrical devices, measuring resonance frequency, etc., can solve problems such as inflexibility, time-consuming, poor system adaptability, etc., and achieve obvious advantages

Active Publication Date: 2015-04-22
SUZHOU INOVANCE CONTROL TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] However, in the frequency converter test system, due to the different equipment under test, the natural frequency of the system machinery is different. In this way, it is time-consuming and inflexible to use software to set related parameters, and the system adaptability is poor.

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  • Mechanical resonance detecting device and method
  • Mechanical resonance detecting device and method
  • Mechanical resonance detecting device and method

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] Such as figure 1 Shown is a structural block diagram of a mechanical resonance detection device according to an embodiment of the present invention. In this embodiment, the mechanical resonance detection device is applied to a frequency converter system, including a sensor 101, an analog-to-digital conversion unit 102, an MCU 103, an interface unit 104, and a power supply unit 105, wherein the power supply unit 105 is connected to the sensor 101, the analog-to-digital conversion The unit 102 is connected to the MCU 103 for powering the sensor 101 , the analog-to-digital conversion unit 102 ...

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Abstract

The invention provides a mechanical resonance detecting device. The mechanical resonance detecting device is characterized in that the device comprises a sensor, an analog-digital conversion unit, an MCU, an interface unit and a power unit which is used for supplying electricity to the sensor, the analog-digital conversion unit and the MCU; the output end of the sensor is connected with the input end of the analog-digital conversion unit, and the sensor comprises a uniaxial piezoelectric simulation accelerometer used for sampling the acceleration magnitude of a vibration detected body; the input end of the analog-digital conversion unit is connected with the output end of the sensor; the input end of the MCU is connected with the output end of the analog-digital conversion unit; the interface unit comprises an RS485 bus, a CAN interface and a switching circuit which are all connected with the MCU. The invention further provides a corresponding mechanical resonance detecting method. By means of the mechanical resonance detecting device and method, the vibration data of the vibration detected body can be obtained in real time, the resonant frequency can be pre-judged in advance according to the resonance triggering condition, and in the system with the changed mechanical inherent frequency, the device and method are simple, reliable and high in adaptability.

Description

technical field [0001] The invention relates to the technical field of mechanical resonance, and more specifically, relates to a mechanical resonance detection device and a method for preventing mechanical resonance, which are applied to a motor drive system with variable frequency speed regulation. Background technique [0002] In the motor drive system with frequency conversion and speed regulation, the mechanical resonance generated has a great destructive effect on the machinery and structure of the system, causing equipment failure and system damage in the slightest, and causing safety accidents in severe cases. [0003] At present, in order to prevent mechanical resonance in the above-mentioned system, the following two methods are usually adopted: one method is to change the system machinery and structure so that the natural frequency of the mechanical system avoids the excitation frequency; the other method is to make the frequency converter excitation frequency skip ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H13/00G01H11/08
Inventor 吴军
Owner SUZHOU INOVANCE CONTROL TECH CO LTD
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