A wireless temperature measuring device with self-powered s-shaped piezoelectric cantilever beam

Abstract

The invention discloses a wireless temperature measuring device with self-powered S-shaped piezoelectric cantilever, which is used to measure the ambient temperature. The piezoelectric effect converts the environmental vibration mechanical energy into electrical energy, and the energy collection management circuit and the energy storage device are suitable for transforming and storing the electrical energy generated by the S-shaped piezoelectric cantilever beam; the temperature measurement module is suitable for measuring the ambient temperature; the main control module uses It is used to control the piezoelectric self-powered module to supply power to other modules, control the work of the wireless communication module and the temperature measurement module; the wireless communication module sends the temperature measurement result to the external platform according to the control signal received from the external platform; the display module Used to display the commissioning and operating status of the device.

Description

technical field [0001] The invention relates to the technical field of energy recovery and sensor energy supply, in particular to a wireless temperature measuring device with an S-shaped piezoelectric cantilever self-powered. Background technique [0002] Temperature is of great significance in industrial and agricultural production and daily life. In the early days, the temperature in the monitoring area was observed and measured by manual inspection, which required a lot of manpower and material resources. In addition, most traditional temperature measurement systems are transmitted by wire, which has disadvantages such as complicated wiring, high cost, and poor mobility. For example: temperature measurement in the field environment, for distributed multiple measurement points, if using external power supply or battery power supply will bring a lot of inconvenience. If a self-powered wireless temperature sensor is used, no external power supply or battery power supply wil...

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Problems solved by technology

But it also has its disadvantages: if the resonant operating frequency is lowered, the length of the cantilever beam needs to be increased, but too long cantilever beam is not conducive to the miniaturization of the device

In addition, most of the existing piezoelectric vibration energy recovery works in a fixed frequency mode, that is, the piezoelectric energy recovery device can only work within a narrow single frequency range, while the frequency of the vibration source in the environment may be within a certain range at any time Fluctuations, or multiple vibration frequencies, if the resonant frequency of the recovery device cannot match the frequency of the environmental vibration source well, the recovered energy will be greatly reduced, and the overall output power will also be sharply reduced. It is difficult to guarantee such The normal operation of microelectronic devices such as wireless temperature measuring devices

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