Boosted circuit used for detecting ultraviolet rays

Abstract

The invention discloses a boosted circuit used for detecting ultraviolet rays. According to the boosted circuit used for detecting the ultraviolet rays, the power supply energy consumption of an ultraviolet ray sensitive gas discharge tube can be reduced, and the detection system energy consumption can be accordingly reduced. The boosted circuit used for detecting the ultraviolet rays is powered by a 5 V direct-current power source and comprises a single-chip microcomputer, a resistor R1, a switch tube Q1, a rapid recovery diode D1, a pulse transformer T1, a rectifier diode D2, an energy-storage capacitor C1 and an ultraviolet ray sensor DS1. The resistor R1 is located between the output end of the single-chip microcomputer and the grid of the switch tube Q1, the drain of the switch tube Q1 is connected with the positive pole of the rapid recovery diode D1 and one end of a primary side winding of the pulse transformer T1, the negative pole of the rapid recovery diode D1 is connected with the power source and the other end of the primary side winding of the pulse transformer T1, one end of a secondary side winding of the pulse transformer T1 is connected with the positive pole of the rectifier diode D2, and the negative pole of the rectifier diode D2 is connected with one end of the energy-storage capacitor C1 and the anode of the ultraviolet ray sensor DS1.

Description

technical field [0001] The invention relates to a voltage boosting circuit for detecting ultraviolet rays. Background technique [0002] The wavelength range of ultraviolet rays contained in sunlight is from 280 nanometers to 400 nanometers. Usually, ultraviolet rays are divided into wavelengths: UVA (long-wave ultraviolet rays): 400-320 nanometers, UVB (medium-wave ultraviolet rays): 320-280 nanometers, UVC (short-wave ultraviolet rays) ): 280-200 nanometers. A large number of ultraviolet rays in the sun's rays that can reach the earth's surface through the ozone protective layer and clouds are above the wavelength of 315 nanometers, and the ultraviolet rays at 200-280 nanometers are close to 0. Generally, the interval of wavelengths below 280 nanometers is collectively referred to as the solar blind area, or solar blindness for short. [0003] Flame detection, discharge detection, and combustion monitoring can be performed using ultraviolet sensors, because these process...

AI Technical Summary

Problems solved by technology

[0006] (1) Because of the use of ultraviolet sensitive gas discharge tubes, AC power is often required as the necessary working power, which makes the system not portable and not easy to install;

[0007] (2) Although only low-voltage direct current is used for power supply, the pulse high voltage driving the ultraviolet-sensitive gas discharge tube maintains for a long time, which is not conducive to reducing the overall energy consumption of the system;

[0008] (3) Due to the physical characteristics of ultraviolet-sensitive gas discharge tubes, prolonging the service life of ultraviolet-sensitive gas discharge tubes is generally not considered

Images