An adaptive frequency-voltage conversion conditioning circuit
A technology of frequency-voltage conversion and conditioning circuits, which is applied in the direction of instruments, speed/acceleration/shock measurement, and measurement devices, etc., which can solve the problems of increased spike amplitude, inability to effectively filter out noise signals, and difficulty in filtering out noise signals. Achieve the effects of improving measurement accuracy, improving reliability and robustness, and expanding range
Active Publication Date: 2021-07-16
SHAANXI AVIATION ELECTRICAL
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] 1) Increase the filter; the above-mentioned spike frequency is the same as the output signal frequency of the magnetic pulse sensor, so it is difficult to filter out such noise signals by adding a filter
[0005] 2) Increase the hysteresis; the amplitude of the above-mentioned spikes changes with the speed of the generator. If the hysteresis voltage amplitude is set too high, the output of the speed measurement circuit will be zero at low speeds; if the hysteresis voltage amplitude is set too high Low, after the speed increases, the spike amplitude increases, making it impossible to effectively filter out such noise signals
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] An adaptive frequency-voltage conversion conditioning circuit, said circuit comprising a pre-conditioning circuit 1, a variable hysteresis comparison circuit 2, a frequency-voltage conversion circuit 3, a control circuit 4, and a proportional amplification circuit 5;
[0017] The pre-conditioning circuit 1 pre-filters the output signal of the sensor, filters out high-frequency interference, and adjusts and limits the amplitude of the signal;
[0018] The variable hysteresis comparison circuit 2 realizes the shaping of the output signal, converts the input signal into a square wave signal with stable amplitude, and at the same time adjusts the hysteresis threshold of the comparison circuit according to the output feedback circuit to effectively filter out the input signal. interference signal;
[0019] The frequency-voltage conversion circuit 3 changes the input square wave signal, and the output is proportional to the frequency of the input signal; the control circuit 4...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an adaptive frequency-voltage conversion conditioning circuit, which belongs to the technical field of aviation electrical design. Because the output waveform of the magnetic pulse type rotational speed sensor of the present invention is affected by the factors of mechanical installation size and permanent magnet material, the output waveform is easily distorted, and spikes are generated in the effective measurement period, and the amplitude of the spikes increases with the magnetic sensor. It is different from the change of the current speed, and the wrong speed measurement will easily lead to the malfunction of the control circuit, which will lead to the early or delayed disengagement of the starting system, making it difficult to start the system, and in severe cases, it will cause the system to fail to start. The invention can effectively eliminate the false pulse signal in the output signal of the magnetic pulse type sensor, effectively improve the measurement accuracy of the rotational speed measurement, thereby improving the reliability and robustness of the aviation low-voltage direct current starting / generating system.
Description
technical field [0001] The invention relates to an adaptive frequency-voltage conversion conditioning circuit, which belongs to the technical field of aviation electrical design. Background technique [0002] Since the output waveform of the magnetic pulse speed sensor is affected by the factors of mechanical installation size and permanent magnet material, the output waveform is prone to distortion, and spikes are generated in the effective measurement period. The amplitude of the spike varies with the magnetic sensor. The speed varies with the change of the speed, and the wrong speed measurement will easily lead to the malfunction of the control circuit, which will lead to the early or delayed disengagement of the starting system, resulting in difficulty in starting the system, and in severe cases, it will cause the system to fail to start. [0003] Traditional conditioning circuits take the following approach: [0004] 1) Add a filter; the above-mentioned spike frequency...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/00
CPCG01P3/00
Inventor 豆岳龙史晓洋李麟何跃闫军部
Owner SHAANXI AVIATION ELECTRICAL