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Sine wave generator for high-precision airborne sensor

A sine wave generator and sensor technology, applied in the direction of electrical components, etc., can solve problems such as large frequency fluctuation range, affecting sine wave voltage and frequency accuracy, and performance degradation of resistance and capacitance

Pending Publication Date: 2021-04-27
ZHUZHOU HONGDA MICROELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing airborne sensor is realized by the analog circuit adopted by the sine wave generator, that is, the sine wave is generated by the triode, resistor, capacitor, and operational amplifier, and its frequency fluctuation range is large, between -150Hz and 150Hz, and with Over time, the performance of resistors and capacitors degrades, affecting the voltage and frequency accuracy of the sine wave
At the same time, the analog circuit has a large capacitor volume, and the size and weight of the entire module are relatively large

Method used

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  • Sine wave generator for high-precision airborne sensor
  • Sine wave generator for high-precision airborne sensor
  • Sine wave generator for high-precision airborne sensor

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Embodiment Construction

[0021] Below in conjunction with all accompanying drawings the present invention will be further described, and preferred embodiment of the present invention is: see appended figure 1 to attach Figure 7 , the sine wave generator for high-precision airborne sensors described in this embodiment, the sine wave generator includes a high-end voltage conversion part (AC_TO_DC_H), a low-end voltage conversion part (AC_TO_DC_L), an auxiliary power supply part (AUX_POWER), MCU part, sine wave generation part (DDS_SINE_WAVE), effective value conversion part (AC_TO_RMS), among them,

[0022] The high-end voltage conversion part (AC_TO_DC_H) is the high-end signal input, which is sent to U6 (effective value conversion chip AD536) through the emitter follower of U5 (operational amplifier LM2904), and U6 is converted into a corresponding DC voltage and then output to LEPDAL_SENSOR_H_AD (this is the terminal number);

[0023] R17, R16, and U5 in AC_TO_DC_H form the high-end signal input f...

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Abstract

The invention provides a sine wave generator for a high-precision airborne sensor, and the sine wave generator comprises a high-end voltage conversion part (AC_TO_DC_H), a low-end voltage conversion part (AC_TO_DC_L), an auxiliary power supply part (AUX_POWER), an MCU part, a sine wave generation part (DDS_SINE_WAVE), and an effective value conversion part (AC_TO_RMS). According to the scheme, the sine wave generator is realized through a digital circuit, the frequency change range is + / -1Hz, the digital chip is adopted to generate sine waves, the performance of the module does not change along with time change, a large-volume capacitor is not needed, and the size and the weight of the whole module are reduced by half.

Description

technical field [0001] The invention relates to the technical field of digital circuits, in particular to a sine wave generator for high-precision airborne sensors. Background technique [0002] The existing airborne sensor is realized by the analog circuit adopted by the sine wave generator, that is, the sine wave is generated by the triode, resistor, capacitor, and operational amplifier, and its frequency fluctuation range is large, between -150Hz and 150Hz, and with Over time, the performance of the resistors and capacitors degrades, affecting the voltage and frequency accuracy of the sine wave. At the same time, the analog circuit has a large capacitor volume, and the size and weight of the entire module are relatively large. Contents of the invention [0003] The purpose of the present invention is to provide a sine wave generator for high-precision airborne sensors with reasonable structure and good use effect. [0004] In order to achieve the above purpose, the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B28/00
CPCH03B28/00
Inventor 梁丁樊平彭俊新程文
Owner ZHUZHOU HONGDA MICROELECTRONICS TECH CO LTD
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