Acquisition circuit and pressure sensor classification method

A pressure sensor and acquisition circuit technology, applied in the field of automatic control, can solve problems such as reduced efficiency, inconvenience, abnormal system operation, etc., and achieve the effect of avoiding abnormal system operation and improving convenience

Active Publication Date: 2021-05-21
ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
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Problems solved by technology

[0003] At present, pressure sensors are mainly divided into current-type pressure sensors and voltage-type pressure sensors. In order to adapt to different types of pressure sensors, the electronic expansion valve controller needs to reserve different ports, and the user needs to manually set the connected pressure sensor type. Caused a lot of inconvenience, and sometimes caused abnormal system operation or reduced efficiency due to incorrect settings

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  • Acquisition circuit and pressure sensor classification method
  • Acquisition circuit and pressure sensor classification method
  • Acquisition circuit and pressure sensor classification method

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Embodiment Construction

[0035]In order to make the above objects, features, and advantages of the present application, the following description will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0036]In order to understand the technical solutions provided herein, the background art according to the present application will be described below.

[0037]Inventors found in traditional collection circuit studies, since the traditional acquisition circuit can only obtain the voltage signal collected by the pressure sensor, such asfigure 1 As shown, P12 is a voltage-type sensor interface, and the resistor R66, R53 is a voltage signal voltage dividing resistor; P13 is a current type sensor interface, and the resistor R72 is a current signal sampling resistor, the U5, and the peripheral circuit are signal amplification circuit. In practical applications, the user can connect the voltage type sensor via the P12 interface or to connect the current sensor thro...

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Abstract

The embodiment of the invention discloses an acquisition circuit and a pressure sensor classification method, and specifically, the acquisition circuit comprises a first transmission circuit, a second transmission circuit and a type judgment circuit. During specific application, a user can connect the required pressure sensor with the first transmission circuit or the second transmission circuit according to own requirements. The type judgment circuit can receive the voltage output by the first transmission circuit or the second transmission circuit and then determine the type of the pressure sensor connected with the controller according to the voltage value; and after the pressure sensor is connected, the controller can automatically identify the type of the pressure sensor according to the voltage value, and the user does not need to select the type on a setting page, so that the use convenience of the user is improved, and the situation of abnormal system operation caused by wrong selection of the user is avoided.

Description

Technical field[0001]The present application relates to the field of automatic control technology, and more particularly to a classification method for acquisition circuits and pressure sensors.Background technique[0002]In the field of commercial refrigeration, the use of the electronic expansion valve has become a trend, and the traditional thermal expansion valve is compared, the electronic expansion valve control is more accurate, and the cooling system efficiency can be improved to achieve energy saving and emission reduction of the system. In actual work, the system requires assembly of pressure sensors, and the electronic valve controller adjusts the electronic expansion valve opening by the pressure signal collected by the pressure sensor and the temperature signal acquired by the temperature sensor to provide refrigeration efficiency.[0003]At present, the current pressure sensor is mainly divided into current pressure sensor and voltage-type pressure sensor. In order to adap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00
CPCG01L1/005
Inventor 不公告发明人
Owner ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
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