30results about How to "Reduced measurement power consumption" patented technology

The invention discloses a component concentration detection device, method and application of a mixed gas, which regulates the temperature of the mixed gas in the measuring gas chamber to T 1 , the heating element is heated to a temperature T 1 +ΔT, at the same time measure the temperature of the mixed gas at the distance L from the heating element, and feedback the heating power of the heating element to keep the temperature of the heating element constant, so that the heat dissipated by the gas conduction is equal to the consumption of maintaining the constant temperature of the heating element The electric power can measure the thermal conductivity of the combined gas. When the mixed gas to be tested is adjusted to multiple temperatures sequentially, the thermal conductivity of the mixed gas is measured by the above method, and then a multivariate linear equation system is established based on the thermal conductivity of the gas with known components and types. The number of equations in the equation group is greater than or equal to the number of the unknown quantity to be measured, that is, the gas concentration, and the concentration of each gas in the mixed gas is obtained by solving the linear equation group according to the least square method.

The invention discloses a vibrating wire sensor with low power consumption, which includes a vibrating wire, a coil, a sensor housing, an excitation circuit unit, a vibration pickup circuit unit and a main control unit; the main control unit includes a pre-vibration module, a re-vibration module, a frequency detection Module and signal processing module, the signal processing module records the effective re-vibration frequency signal, and at the same time controls the excitation detection process of the sensor, so that the sensor works in two modes of steady state and unsteady state, and according to the recorded effective re-vibration frequency value, Calculate the excitation frequency value output by the re-vibration module in the steady-state working mode. The invention provides a vibrating wire sensor with low power consumption, which changes the excitation mode of the vibrating wire, changes the traditional low-voltage sweep frequency excitation mode into the excitation mode of pre-vibration combined with re-vibration, and detects the frequency during pre-vibration The value is used as the excitation pulse frequency for re-vibration, thus achieving the effect of energy saving.

The invention discloses an LTE terminal measurement cell selection method. The method comprises the following steps: after a measurement task is completed for the first time, recording, by a terminal,the current measurement cells as measured cells, and selecting N cells with the best signal quality from the measured cells to serve as tracking cells; tracking the timing deviations of the trackingcells to serve as the historical timing deviations of the tracking cells; in a non-first-time measurement task, estimating, by the terminal, the current timing deviations of the tracking cells; if thedifference values between the current timing deviations of the tracking cells and the historical timing deviations of the tracking cells are all less than a preset threshold value, selecting, by theterminal, a to-be-measured cell newly added by the present measurement task as the measurement cell for measurement; otherwise, selecting, by the terminal, all to-be-measured cells of the present measurement task as the measurement cells for measurement. By adoption of the technical scheme disclosed by the invention, the measurement power consumption of the terminal and the received data size areeffectively reduced while ensuring the accuracy of the measurement data reported by the terminal.

The invention provides a method and a device for acquiring analog signals. The method includes inputting standard voltages into an analog input end of an analog-digital converter; inputting to-be-measured analog signals into a reference voltage end of the analog-digital converter; acquiring digital signals outputted by the analog-digital converter; acquiring values of the to-be-measured analog signals according to standard voltages and the digital signals. The method and the device in an embodiment of the invention have the advantages that high-order signals can be directly measured; the amplitude of the standard voltages can be lower than the values of the to-be-measured analog signals, accordingly, requirements on reference voltages can be lowered, and the analog signals can be measured by the aid of the standard voltages with the low amplitude; the measurement accuracy can be improved.