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Sensor device and sensor system for determining abnormalities in signal processing circuit and pressure and temperature detection unit by changing supply voltage

A signal processing circuit and sensor device technology, which is applied in the measurement of fluid pressure through electromagnetic components, measurement devices, transportation and packaging, etc., can solve the problems of pressure measurement and measurement accuracy reduction

Inactive Publication Date: 2021-01-19
DENSO CORP
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  • Claims
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Problems solved by technology

However, in this case, the measurement accuracy of the pressure measurement may be reduced

Method used

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  • Sensor device and sensor system for determining abnormalities in signal processing circuit and pressure and temperature detection unit by changing supply voltage
  • Sensor device and sensor system for determining abnormalities in signal processing circuit and pressure and temperature detection unit by changing supply voltage
  • Sensor device and sensor system for determining abnormalities in signal processing circuit and pressure and temperature detection unit by changing supply voltage

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[0110] (1) In the above-described embodiments, chlorofluorocarbons are used as refrigerants. However, the refrigerant is not limited to chlorofluorocarbons. For example, carbon dioxide or the like can also be used as the refrigerant.

[0111] (2) In the above-described embodiment, the present sensor device is described as an example in which the sensor device is used in a heat pump system as an air conditioner of an electric vehicle. However, the present sensor device can also be used in systems other than heat pump systems.

[0112] (3) In the above-described embodiment, in S106, the voltage supplied to the pressure temperature sensor 1 is decreased (ie, changed to decrease) in the control. However, the voltage supplied to the pressure temperature sensor 1 may also be increased. In addition, the voltage supplied to the pressure temperature sensor 1 may also be changed to repeat the decrease and increase.

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Abstract

The invention relates to a sensor device and a sensor system. The sensor device changes a power supply voltage (S106) and checks whether an output signal of a signal processing circuit (40) includinga pressure signal and a temperature signal changes in accordance with a change in the power supply voltage caused by a voltage change control unit for determining whether the signal processing circuit(40) is normal or abnormal (S112, S114, S116).

Description

technical field [0001] The present invention generally relates to a sensor system or sensor device. Background technique [0002] Conventionally, a plurality of measured quantities related to refrigerants, such as refrigerant pressure and refrigerant temperature of a refrigeration cycle device, are detected, and state quantities such as a plurality of variables are calculated from these measured quantities, and based on the calculation results, it is determined whether the device is normal or abnormal (for example, see Patent Document 1). [0003] [Patent Document 1] JP 2005-291702 A [0004] In a heat pump cycle for heating electric vehicles, fuel cell vehicles, etc., for example, if a refrigerant in a liquid phase flows into a compressor of the heat pump cycle, the compressor may be damaged. Therefore, a pressure temperature sensor for detecting the pressure and temperature of the refrigerant flowing into the compressor is provided in the heat pump cycle, and the state o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/00G01D21/02G01D18/00
CPCB60H1/00585G01D21/02G01D18/00G01L19/0069G01L19/0092G01L27/007G01L9/0052
Inventor 大野和幸
Owner DENSO CORP
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