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A Signal Acquisition Circuit of Grain Loss Sensor

A signal acquisition and sensor technology, applied in scientific instruments, measurement devices, particle and sedimentation analysis, etc., can solve problems such as beneficial signal crosstalk

Active Publication Date: 2021-04-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sensors, charge amplifiers, and data acquisition cards need to be connected through complex cables, and external noise can easily cause crosstalk to beneficial signals through cables

Method used

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  • A Signal Acquisition Circuit of Grain Loss Sensor
  • A Signal Acquisition Circuit of Grain Loss Sensor
  • A Signal Acquisition Circuit of Grain Loss Sensor

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] The present invention is a design of a signal acquisition circuit for the PVDF-based double-layer cross structure particle collision sensor proposed in the patent application CN201611039729.5. In the present invention, the grain loss sensor refers to the particle collision sensor composed of the x-direction sensor layer, insulating sheet, y-direction sensor layer and support plate in the patent application CN201611039729.5, and the upper and lower sensing layers refer to the x-direction sensor layer and the y-direction sensor layer. In the sensor layer, the upper and lower sensing modules refer to the x-direction sensing unit and the y-direction sensing unit. The upper and lower sensing modules are arranged in parallel to form the upper and lower layer sensing arrays. direction and y direction.

[0033] The specific implementation of the present inven...

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Abstract

The invention discloses a signal acquisition circuit of a grain loss sensor. It includes a charge-voltage conversion circuit, an absolute value circuit, and a band-pass filter circuit connected in series in order to adjust the charge signal output by the grain loss sensor into a voltage signal suitable for transmission and processing, and to process the noise signal except the grain impact signal. Filtering; two cascaded A / D converters are controlled by the DSP microcontroller to synchronously collect the output signals of the 8*8 sensing modules conditioned by the signal conditioning unit, providing a reliable data source for the statistics of lost seeds; power supply The circuit supplies power to the signal conditioning unit and the signal acquisition circuit. The invention has the advantages of compact design structure, excellent performance and high cost performance, and provides possibility for popularization and use of grain loss sensors.

Description

technical field [0001] The invention relates to a signal acquisition circuit of a sensor, in particular to a signal acquisition circuit of a grain loss sensor. Background technique [0002] In order to improve the working quality and production efficiency of the combine harvester, it is necessary to detect the harvest loss of the combine harvester in real time. In recent years, some experts and scholars at home and abroad have carried out a series of research on the grain loss detection device applied to the combine harvester. Patent CN201611039729.5 proposes a PVDF-based double-layer criss-cross structure particle collision sensor. The device is installed at the end of the cleaning screen of the combine harvester, which can realize the identification and statistics of multiple grains lost at a certain moment. It makes up for the defect that most of the research on the grain loss detection device only detects a single grain. [0003] Patent CN201611039729.5 proposes the wo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/10
CPCG01N15/10G01N2015/1024
Inventor 王剑平曹蕊孙莹俞永华
Owner ZHEJIANG UNIV
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