3results about How to "Control power" patented technology

The invention discloses a watch heart rate monitoring method and device based on TEC temperature control, and solves the problem of inaccurate heart rate monitoring caused by the fact that the influence of temperature on a photoelectric sensor is not considered when a smart watch photoelectric measurement method is used for measuring the heart rate in the prior art. Comprising the following steps: acquiring the surface temperature of LED lamp beads at the bottom of the watch or the ambient temperature in real time; according to the target temperature range and the current temperature value, the TEC working mode is adjusted based on a preset temperature control algorithm; continuously detecting the temperature of the LED lamp bead, and dynamically adjusting the working power of the TEC according to the temperature change trend; after the temperature of the watch is stabilized within the target temperature range, photoelectric signals are collected for heart rate monitoring. The light source temperature can be stabilized in the optimal working temperature interval, and the accuracy of heart rate measurement is improved.

The present invention provides a kind of plasma processing device, the purpose is to control the power of the power with the bandwidth realized by multiple carriers after pulse modulation with high precision.The device includes the power supply unit that can generate the power with bandwidth, the power generated by power supply unit is implemented pulse modulation so that it has high level power and low level power, and, the pulse on time determined by setting pulse frequency and setting duty cycle has the power variation period of the power with bandwidth is long.

The application discloses a kind of radio frequency signal source output power control method, the method includes: the output power range of standard radio frequency signal source and the numerical control attenuation range of numerical control attenuator are divided to obtain multiple control regions, the boundary point of each control region corresponds an output power, a frequency and a numerical control attenuation quantity;Each control region is constructed standard corresponding relationship based on the numerical control attenuation quantity corresponding to the voltage control attenuator;Based on the standard corresponding relationship, target frequency and target power, control the radio frequency signal source to be controlled, can accurately control the power required by radio frequency signal source output, avoid the larger error of output power.