Combined pressure and temperature sensor using pressure- and temperature-sensitive paints

2012 ◽  
Author(s):  
Tomohiro Kameya ◽  
Yu Matsuda ◽  
Yasuhiro Egami ◽  
Hiroki Yamaguchi ◽  
Tomohide Niimi
Keyword(s):  
Temperature Sensor ◽  
Temperature Sensitive

A High-Speed Temperature Sensor with Low Supply Sensitivity for SoC Thermal Monitoring

2018 ◽  
Vol 27 (07) ◽  
pp. 1850116
Author(s):  
Yuanxin Bao ◽  
Wenyuan Li
Keyword(s):  
Temperature Sensor ◽  
Conversion Rate ◽  
High Speed ◽  
Supply Voltage ◽  
Ring Oscillator ◽  
Temperature Sensitive ◽  
Cmos Process ◽  
Digital Code ◽  
Thermal Monitoring ◽  
Worst Case

A high-speed low-supply-sensitivity temperature sensor is presented for thermal monitoring of system on a chip (SoC). The proposed sensor transforms the temperature to complementary to absolute temperature (CTAT) frequency and then into digital code. A CTAT voltage reference supplies a temperature-sensitive ring oscillator, which enhances temperature sensitivity and conversion rate. To reduce the supply sensitivity, an operational amplifier with a unity gain for power supply is proposed. A frequency-to-digital converter with piecewise linear fitting is used to convert the frequency into the digital code corresponding to temperature and correct nonlinearity. These additional characteristics are distinct from the conventional oscillator-based temperature sensors. The sensor is fabricated in a 180[Formula: see text]nm CMOS process and occupies a small area of 0.048[Formula: see text]mm2 excluding bondpads. After a one-point calibration, the sensor achieves an inaccuracy of [Formula: see text][Formula: see text]1.5[Formula: see text]C from [Formula: see text]45[Formula: see text]C to 85[Formula: see text]C under a supply voltage of 1.4–2.4[Formula: see text]V showing a worst-case supply sensitivity of 0.5[Formula: see text]C/V. The sensor maintains a high conversion rate of 45[Formula: see text]KS/s with a fine resolution of 0.25[Formula: see text]C/LSB, which is suitable for SoC thermal monitoring. Under a supply voltage of 1.8[Formula: see text]V, the maximum energy consumption per conversion is only 7.8[Formula: see text]nJ at [Formula: see text]45[Formula: see text]C.

The Optical Properties of Epoxy for Temperature Sensitive Sensor

2016 ◽  
Vol 1133 ◽  
pp. 404-408
Author(s):  
Khairuldin Mohd Isha ◽  
Syafawati Hashim
Keyword(s):  
Temperature Sensor ◽  
Development Process ◽  
Fiber Optic ◽  
Fluorescence Signal ◽  
Temperature Sensitive ◽  
Response Characteristics ◽  
Sensitive Sensor ◽  
Higher Temperature ◽  
Cryogenic Conditions ◽  
Fiber Optic Temperature

The development of optical fibre temperature indicator using epoxy glue as a detection membrane is presented. This study, investigates the effects of epoxy glue from the reaction of epoxy resin, bisphenol A (BPA) (80-05-7) and adhesive epichlorohydrine (ECH) (106-89-8) as a temperature indicator membrane. In this work the response of epoxy glue to excitation source 395 nm is tested and analyzed under cryogenic conditions. A fiber optic temperature sensor for detecting ambient temperature ranging from 15 °C to 80 °C has been examined. The epoxy glue fluoresce when excited with UV-blue light source. The intensity of the fluorescence of the material decreases when the epoxy glue is exposed to an environment of higher temperature. These decrease level of fluorescence signal has been used to indicate temperature. In this paper, the basic principle of operation, development process and emission response characteristics of this sensor are discussed.

scholarly journals A batteryless temperature sensor based on high temperature sensitive material

2016 ◽  
Vol 74 (2) ◽  
pp. 24606 ◽  
Author(s):  
Asma Bakkali ◽  
José Pelegri-Sebastia ◽  
Youssef Laghmich ◽  
Abdelouahid Lyhyaoui
Keyword(s):  
High Temperature ◽  
Temperature Sensor ◽  
Temperature Sensitive ◽  
Sensitive Material

Passive UHF RFID-Enabled Sensor System For Detection Of Product’S Exposure To Elevated Temperature

2013 ◽  
Vol 20 (4) ◽  
pp. 591-600 ◽  
Author(s):  
Kamil Janeczek ◽  
Małgorzata Jakubowska ◽  
Grażyna Kozioł ◽  
Piotr Jankowski-Mihułowicz
Keyword(s):  
Elevated Temperature ◽  
Temperature Change ◽  
Temperature Sensor ◽  
Sensor System ◽  
Temperature Sensitive ◽  
Uhf Rfid ◽  
Key Factors ◽  
Temperature Level ◽  
Passive Uhf Rfid ◽  
Uhf Antenna

Abstract Temperature change is one of key factors which should be taken into account in logistics during transportation or storage of many types of goods. In this study, a passive UHF RFID-enabled sensor system for elevated temperature (above 58°C) detection has been demonstrated. This system consists of an RFID reader and disposable temperature sensor comprising an UHF antenna, chip and temperature sensitive unit. The UHF antenna was designed and simulated in an IE3D software. The properties of the system were examined depending on the temperature level, type of package which contains the studied objects and the type of antenna substrate.

scholarly journals High-sensitivity temperature sensor based on photonic crystal fiber fully coated with gold and PDMS films.

2021 ◽  
Author(s):  
yuhui feng ◽  
shuguang li ◽  
hongyu li ◽  
xiaojian meng ◽  
mengqiang li
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Temperature Sensor ◽  
Gold Film ◽  
Fem Simulation ◽  
Temperature Response ◽  
High Sensitivity ◽  
Temperature Sensitive ◽  
Pdms Layer ◽  
Crystal Fiber

Abstract This paper presented a high-sensitivity temperature sensor based on photonic crystal fiber fully coated with gold and PDMS films. For the convenience of production, gold film is coated outside the fiber cladding, and it is used to excite the surface plasmon resonance (SPR) effect. In addition, the temperature response has been effectively improved by depositing poly-dimethylsiloxane (PDMS) layer outside the gold film. This fully coated structure on the outside of PCF enables temperature-sensitive medium to be in direct contact with the environment, which reduces the difficulty of internal coating and filling. The influences of the parameters on the sensing characteristics are investigated by using the finite element method (FEM). Simulation results show that the average temperature sensitivity is up to 9.287 nm/℃ in the range of -20℃-40℃. Moreover, compared with other designs, the optimized process of structure in this study provides an effective method, which shows a wide application prospect to overcome the difficulty of filling liquid in the air holes.

A low power-integrated temperature sensor interface circuit

2022 ◽  
Author(s):  
Mingyuan Ren ◽  
Huijing Yang ◽  
Beining Zhang ◽  
Guoxu Zheng
Keyword(s):  
Temperature Sensor ◽  
Supply Voltage ◽  
Sampling Rate ◽  
Average Power ◽  
Temperature Sensitive ◽  
Frequency Noise ◽  
Power Supply Voltage ◽  
Sensor Interface ◽  
Interface Circuit ◽  
Average Power Consumption

This paper constructs and simulates the interface circuit of a temperature sensor based on SMIC 0.18 [Formula: see text]m CMOS. The simulation results show that when the power supply voltage is 1.8 V, the chopper op-amp gain is 89.44 dB, the low-frequency noise is 71.83 nV/Hz,[Formula: see text] and the temperature coefficient of the core temperature sensitive circuit is 1.7808 mV/[Formula: see text]C. The sampling rate of 10-bit SAR ADC was 10 kS/s, effective bit was 9.0119, SNR was 59.3256 dB, SFDR was 68.7091 dB, and THD was −62.5859 dB. The measurement range of temperature sensor interface circuit is −50[Formula: see text]C[Formula: see text]C, the relative temperature measurement error is ±0.47[Formula: see text]C, the resolution is 0.2[Formula: see text]C/LSB, and the overall average power consumption is 434.9 [Formula: see text]W.

A novel dichromic self-referencing optical probe SrO:Bi3+,Eu3+ for temperature spatially and temporally imaging

2016 ◽  
Vol 45 (34) ◽  
pp. 13317-13323 ◽  
Author(s):  
Jipeng Fu ◽  
Ran Pang ◽  
Lihong Jiang ◽  
Yonglei Jia ◽  
Wenzhi Sun ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Real Time ◽  
Temperature Sensor ◽  
Room Temperature ◽  
Optical Probe ◽  
Temperature Sensitive ◽  
Real Time Monitoring

A dichromic temperature sensitive probe was synthesized to construct an effective luminescence temperature sensor and to realize real-time monitoring of surface temperature transients from room temperature to 200 °C.

Temperature-Sensitive Reaction of a Photosensor Protein YcgF: Possibility of a Role of Temperature Sensor

Biochemistry ◽  
2010 ◽  
Vol 49 (10) ◽  
pp. 2288-2296 ◽  
Author(s):  
Yusuke Nakasone ◽  
Taka-aki Ono ◽  
Asako Ishii ◽  
Shinji Masuda ◽  
Masahide Terazima
Keyword(s):  
Temperature Sensor ◽  
Temperature Sensitive

scholarly journals A Flexible Temperature Sensor Array with Polyaniline/Graphene–Polyvinyl Butyral Thin Film

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4105 ◽  
Author(s):  
Jin Pan ◽  
Shiyu Liu ◽  
Hongzhou Zhang ◽  
Jiangang Lu
Keyword(s):  
Thin Film ◽  
Temperature Sensor ◽  
Flexible Substrate ◽  
Pressure Sensors ◽  
Polyvinyl Butyral ◽  
Wearable Devices ◽  
Temperature Sensors ◽  
Temperature Sensitive ◽  
Device Structure ◽  
Temperature And Pressure

Thermal-resistance temperature sensors generally employ temperature-sensitive materials as active layers, which are always deposited on a flexible substrate to improve flexibility. Such a temperature sensor is usually integrated in wearable devices with other sensors, such as pressure sensors and stretchable sensors. In prior works, the temperature and pressure sensors are usually located in different layers in a multifunction sensor, which results in a complicated fabrication process, as well as a large thickness of devices. Meanwhile, many temperature sensors are based on large areas of non-transparent materials, leading to difficulties in integrating display applications. In this paper, we demonstrate a flexible temperature sensor based on polyaniline/graphene (GPANI)–polyvinyl butyral (PVB) thin film and indium tin oxides (ITO)- polyethylene terephthalate (PET) substrates. The GPANI particles embedded in PVB film not only contribute to temperature detection, but also response to external pressures, due to weak deformations. In addition, the thin composite film (2.7 μm) highly improved the transparency. By optimizing the device structure, the sensor integrates temperature and pressure detection into one single layer, which shows a wide temperature range of 25–80 °C, a pressure range of 0–30 kPa, and a high transparency (>80%). The temperature sensor offers great potential for applications in emerging wearable devices and electronic skins.

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