Passive temperature sensor and test system based on same
A temperature sensor and sensor technology, applied in thermometers, thermometers and instruments with direct heat-sensitive electric/magnetic elements, etc., can solve problems such as line aging, limit the application of sensors and sensor systems, and battery energy depletion, and achieve Accuracy improvement and the effect of realizing passivation
Inactive Publication Date: 2013-08-14
HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology
In this way, the application of sensors and sensor systems is limited in places where wiring is not suitable or where personnel cannot reach.
In addition, if the sensor system has not been used for a long time after installation, the aging of the circuit will cause the system to fail
If a dry battery is used for power supply, there will also be a problem that the battery energy will be exhausted due to excessive use time, and the power supply for the normal operation of the sensor system will not be able to cause the system to fail.
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[0025] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so as to better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.
[0026] figure 1 Shown is a block diagram of a passive temperature sensor system. When the external temperature changes, the thermoelectric material converts the change in the temperature field into electrical energy, and the generated electrical energy will supply power to the resistive voltage divider network and subsequent equipment. temperature value.
[0027] figure 2 Shown is the top view of the upper electrode plate of the passive temperature sensor. The electrode plate uses a 4cm*5cm (length*width) AlN substrate as the electrode plate 6. The mask plate technology is combined with the magnet...
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The invention provides a passive temperature sensor and a test system based on the same. The passive temperature sensor comprises a lamellar directional thin-film thermoelectric material Bi0.5Te1.5Se3 (4) composed of a nano-wire array, a Ti barrier layer (11), a Cu electrode (5), a Ni adhesion layer (10), an AlN substrate pole plate (6), a voltage-division type resistor temperature-measuring network and a diode (9), wherein the voltage-division type resistor temperature-measuring network is composed of a high-precision standard resistor (7) and a thermistor (8) which are connected with each other in series; the barrier layer (11) is used for preventing a diffusing effect between an electrode and a thermoelectric material; the adhesion layer (10) is used for connecting a metal electrode and a semiconductor substrate; the standard resistor (7) and the thermistor (8) are used for measuring the temperature; and the diode (9) is used for preventing current from entering into the thermoelectric material in an active work mode. According to the invention, electric signals generated by triggering the passive temperature sensor are used as a detection signal and a power supply, so that thepower is not needed to be supplied to the sensor.
Description
technical field [0001] The invention relates to the field of pyroelectric sensors, in particular to a passive temperature sensor and a test system based on passive temperature sensor components. Background technique [0002] At present, most logarithmic sensors require power supply, and all sensor systems have external power supply or internal battery. In this way, the application of sensors and sensor systems is limited in places where wiring is not suitable or where personnel cannot reach. In addition, if the sensor system is not used for a long time after installation, the aging of the circuit will cause the system to fail. If a dry battery is used for power supply, there will also be a problem that the energy of the battery will be exhausted due to excessive use time, and the power supply for the normal operation of the sensor system will not be able to cause the system to fail. One of the key constraints on the effectiveness of the sensor system is therefore the power...
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IPC IPC(8): G01K7/22
Inventor 邓元史永明祝薇王瑶叶慧红
Owner HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS