Smart sensor and its application system using wireless charging technology

Abstract

The invention discloses an intelligent sensor comprising a CPU and a wireless sending module coupled with the CPU. The intelligent sensor comprises an induction coil, a power supply module, a chargeable cell, a change-over switch, a sampling circuit and the CPU. The induction coil is used for sensing voltages or currents of power distribution lines and outputting an induction electric quantity. The power supply module is coupled with the induction coil to receive the induction electric quantity, and converts the induction electric quantity into a first supply voltage provided for a rear-stage circuit. The chargeable cell is coupled with the power supply module to receive the first supply voltage to perform charging energy storage, generates a second supply voltage for the rear-stage circuit and simultaneously gives feedbacks of the electric quantity to the CPU. The change-over switch is used for selecting the first supply voltage or the second supply voltage to supply the rear-stage circuit with electric power. The sampling circuit is coupled with the induction coil to receive the induction electric quantity, converts the induction electric quantity into sampling signals in a digital quantity and sends the sampling signals to the CPU. The CPU controls motions of the change-over switch according to computational results of the sampling signals and the electric quantity of the chargeable cell. The intelligent sensor provided by the invention has relatively high stability.

Description

technical field [0001] The invention relates to the technical field of electronic appliances, in particular to an intelligent sensor and a system using the sensor. Background technique [0002] The traditional mutual inductors have two mutual inductance and wired transmission. In this way, during the construction and installation process, the length of the wiring during construction will be different due to the distance between the measurement point and the detection meter, which will lead to a decrease in sampling accuracy and data loss due to line loss. Inaccurate, large deviation. Because it is wired transmission, on-site construction will be very difficult and the construction cost will be very high. Sometimes the value of the cable exceeds the current transformer itself due to the distance, which virtually increases the cost. Because it is a later stage of construction, it is often subject to the requirements of wiring, which leads to great restrictions on the installa...

AI Technical Summary

Problems solved by technology

[0004] The transformer in the above patent uses the current induction coil to take power from the distribution line, and converts the transformer and power circuit to obtain the voltage for the subsequent circuit. However, the ripple current that inevitably exists in the distribution line passes through the current induction coil and the power supply circuit. After the transformer, it affects the output voltage of the power supply circuit, thereby affecting the subsequent stage circuit

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