Three minutes to teach you to check your coolant temperature sensor!
1, coolant temperature sensor output signal voltage check: installed coolant temperature sensor, the sensor wire connector plugged in, when the ignition switch is in the ON position, from the sensor wire connector THW terminal (Toyota) or from the ECU connector THW terminal and E2 test sensor output voltage signal (Beijing Cherokee is the sensor wire connector B terminal or from the ECU connector THW terminal and E2 test sensor output voltage signal).
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1, coolant temperature sensor output signal voltage check: installed coolant temperature sensor, the sensor wire connector plugged in, when the ignition switch is in the ON position, from the sensor wire connector THW terminal (Toyota) or from the ECU connector THW terminal and E2 test sensor output voltage signal (Beijing Cherokee is the sensor wire connector B terminal or from the ECU connector THW terminal and E2 test sensor output voltage signal).
The development and application of fiber optic temperature sensors
Temperature sensors are based on a basic physical quantity called "temperature", which refers to a sensor that senses temperature and converts it into a usable output signal. Temperature sensors are the core part of temperature measuring instruments, and there are a wide variety of them. According to the measurement method can be divided into contact and non-contact two categories, according to the sensor material and the characteristics of the electronic components are divided into two categories of RTD and thermocouple.
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Temperature sensors are based on a basic physical quantity called "temperature", which refers to a sensor that senses temperature and converts it into a usable output signal. Temperature sensors are the core part of temperature measuring instruments, and there are a wide variety of them. According to the measurement method can be divided into contact and non-contact two categories, according to the sensor material and the characteristics of the electronic components are divided into two categories of RTD and thermocouple.
A contact temperature measurement solution using a fiber optic grating temperature sensor
Six fiber-optic grating temperature sensor measurement at the same time involves the multiplexing of the optical path, fiber-optic grating sensor multiplexing can use wavelength division multiplexing (WDM), space division multiplexing (SDM) or time division multiplexing (TDM), the system is using space division multiplexing and wavelength division multiplexing methods. As shown in Figure 2, with 1′8 coupler to achieve the sensor null division multiplexing, so as to avoid the disadvantages of a single wavelength division multiplexing, that is, multiple sensors in series on an optical fiber, in which a sensor damage will affect the transmission of other sensor signals; at the same time the choice of the sensor operating wavelength and wavelength division multiplexing, used to improve the system's measurement speed, that is, in the wavelength demodulation Six sensors can be measured simultaneously with one scan cycle.
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Six fiber-optic grating temperature sensor measurement at the same time involves the multiplexing of the optical path, fiber-optic grating sensor multiplexing can use wavelength division multiplexing (WDM), space division multiplexing (SDM) or time division multiplexing (TDM), the system is using space division multiplexing and wavelength division multiplexing methods. As shown in Figure 2, with 1′8 coupler to achieve the sensor null division multiplexing, so as to avoid the disadvantages of a single wavelength division multiplexing, that is, multiple sensors in series on an optical fiber, in which a sensor damage will affect the transmission of other sensor signals; at the same time the choice of the sensor operating wavelength and wavelength division multiplexing, used to improve the system's measurement speed, that is, in the wavelength demodulation Six sensors can be measured simultaneously with one scan cycle.
