Intermittent digital sensor working power supply for supplying power with weak environment energy

Abstract

The invention provides an intermittent digital sensor working power supply for supplying power with weak environment energy, which relates to the technical field of weak-current power supply, and aims to reduce the construction workload of a sensor and alleviate the influence on surrounding electric equipment by wiring of the sensor. The power supply comprises an energy storage loop, a voltage switching loop and a weak energy collecting device, wherein the weak energy collecting device is used for collecting the weak environment energy for charging the energy storage loop; the energy storage loop consists of an energy storage capacitor and is used for storing and outputting electric energy; the voltage switching loop comprises a switching comparer and an electronic selector switch; the energy storage loop outputs the electric energy through the electronic selector switch; and the switching comparer is used for detecting end voltage of the energy storage loop and controlling the intermittent on and off of the electronic selector switch according to a value of the end voltage of the energy storage loop. The power supply provided by the invention is suitable for supplying the working power to the micro-power-consumption sensor intermittently used by an internal circuit.

Description

technical field [0001] The invention relates to weak current power supply technology, in particular to a technology of intermittent digital sensor working power supply powered by environmental weak energy. Background technique [0002] Sensors are important equipment in the field of industrial or building automation. They are used to convert non-electrical signals such as temperature, flow, vibration, illuminance, and concentration that automation equipment needs to collect, as well as electrical signals such as current and voltage, into analog signals or digital signals that automation equipment can collect. Signal. Sensors that send out digital measurement signals can be referred to simply as digital sensors. [0003] Existing digital sensors need to provide 5V or 3.3V or other specifications of DC voltage because of the internal microprocessor, sampling circuit and communication interface and other components. Therefore, existing sensors need to be powered by batteries ...

AI Technical Summary

Problems solved by technology

When there are a large number of sensors installed on the industrial automation site, for example, if the power equipment of a county-level power grid is equipped with online temperature sensors at all monitoring points of concern, then the number of temperature sensors required may reach tens of thousands. Therefore, in this In this installation scale, battery replacement will become a very difficult task

[0005] Sensors powered by external power lines must involve the layout of power lines, which will increase the workload during construction, and in some high-voltage occasions, the power lines laid will seriously affect the insulation performance of the original electrical equipment

Images