Composite power supply type wireless temperature measuring sensor and its control method

Abstract

The invention discloses a composite power supply type wireless temperature measurement sensor and a control method thereof. The composite power supply type wireless temperature measurement sensor includes an energy harvesting sensing part, an energy harvesting voltage measurement and output control part, an energy harvesting energy output and suppression part, battery charging management and Power supply voltage forming part, temperature measurement sensing and wireless transmission part, microprocessor and core control part; the control method of composite power supply wireless temperature measurement sensor includes analog measurement and calculation logic, power supply selection and control logic, charging control Logic and low-power control logic; the wireless temperature sensor adopts single-core double-winding induction power supply and rechargeable battery power supply mode, which improves the energy supply efficiency of the induction coil, and can reduce the high current while meeting the small current start-up work The temperature rise of the iron core and the coil solves the problem that the inductive energy supplement sensor cannot work when powered by induction alone or the battery needs to be replaced when the energy is exhausted when powered by battery alone.

Description

technical field [0001] The invention relates to the technical field of temperature measurement sensor power supply control, in particular to a composite power supply type wireless temperature measurement sensor and a control method thereof. Background technique [0002] Existing technology as attached figure 1 As shown, all the energy of the battery-powered scheme is provided by the battery. In order to ensure that the energy of the battery is sufficient to work for a period of time, the work of the wireless temperature sensor generally adopts compartmental work. The sensor enters the low power consumption mode to reduce the power supply requirements of the system; when the battery energy is completely insufficient, it is necessary to replace the battery or the entire sensor; figure 2 In the induction power supply mode, the energy of the induction coil provides working energy for the sensor. When the voltage of the induction coil is too high, the electronic switch S short-...

AI Technical Summary

Problems solved by technology

[0002] Existing technology as attached figure 1 As shown, all the energy of the battery-powered scheme is provided by the battery. In order to ensure that the energy of the battery is sufficient to work for a period of time, the work of the wireless temperature sensor generally adopts compartmental work. The sensor enters the low power consumption mode to reduce the power supply requirements of the system; when the battery energy is completely insufficient, it is necessary to replace the battery or the entire sensor; figure 2 Inductive power supply mode, the energy of the induction coil provides working energy for the sensor. When the voltage of the induction coil is too high, the electronic switch S short-circuits the two ends of the coil to discharge the energy; when the induction energy is insufficient, the sensor cannot work

[0003] The shortcomings of the existing technology are as follows: the battery-powered wireless temperature measurement sensor works in a periodic mode, the cycle of refreshing temperature data is long, the update speed is slow, and when the battery energy is exhausted, it is necessary to replace the new battery or replace the sensor as a whole

Inductive power supply type, when the induction energy is insufficient, the sensor cannot work, and the induction coil tends to heat up when the current is large, and the energy needs to be released

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