Bootstrap optical power control circuit of semiconductor laser pain therapy instrument

Abstract

The invention discloses a bootstrap optical power control circuit of a semiconductor laser pain therapy instrument, which includes an optical power signal acquisition circuit, a bootstrap boost regulation circuit, a hysteresis voltage regulator circuit, and the optical power signal acquisition circuit collects the laser power emitted by a laser. The signal is subtracted by the operational amplifier, outputs the voltage difference information, and triggers the corresponding primary and secondary transistors in the bootstrap boost control circuit to be turned on or off to achieve a multiple of the laser power supply voltage VCC. Hysteresis voltage regulator circuit, hysteresis voltage regulator circuit eliminates the small voltage change near the value of the power supply voltage VCC1, improves the anti-interference ability, and provides a stable voltage for the laser through the diode, so as to realize the pain treatment of semiconductor laser by changing the power supply voltage of the laser The optical power of the instrument is automatically controlled to ensure that the optical power emitted by the laser LD1 is constant, and the therapeutic effect is achieved. It is simple and practical, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a bootstrap optical power control circuit of a semiconductor laser pain treatment instrument. Background technique [0002] Laser can produce biostimulation effect, promote cell regeneration, improve blood circulation, reduce inflammation and pain, reduce edema, regulate immune function of the body, semiconductor laser pain therapy device, adopts the wavelength range of 650 / 808nm human optical window, dual-wavelength composite light, tissue Penetration deepens up to 175px, produces multiple light effects, no trauma, no pain, safe and reliable, high output power, short treatment time, such as in orthopedics, bone pain, muscle pain, soft tissue pain, neuralgia, incision and wound pain, etc. It is widely used in the physical therapy of trauma surgery and pain diseases. In actual use, due to the instability of the power supply voltage (AC 220V power supply) and the characte...

AI Technical Summary

Problems solved by technology

[0002] Laser can produce biostimulation effect, promote cell regeneration, improve blood circulation, reduce inflammation and pain, reduce edema, regulate immune function of the body, semiconductor laser pain therapy device, adopts the wavelength range of 650 / 808nm human optical window, dual-wavelength composite light, tissue Penetration deepens up to 175px, produces multiple light effects, no trauma, no pain, safe and reliable, high output power, short treatment time, such as in orthopedics, bone pain, muscle pain, soft tissue pain, neuralgia, incision and wound pain, etc. It is widely used in the physical therapy of trauma surgery and pain diseases. In actual use, due to the instability of the power supply voltage (AC 220V power supply) and the characteristics of the laser itself (the operating temperature will continue to rise and be converted into heat) will cause laser damage. The power is unstable and the power applied to the laser is attenuated, so the therapeutic effect cannot be achieved

Images