Mass Airflow Sensor: Ambient Temperature Compensation Design Considerations

1986 ◽  
Author(s):  
Glenn A. Gurtcheff ◽  
Lawrence D. Hazelton
Keyword(s):  
Ambient Temperature ◽  
Temperature Compensation ◽  
Design Considerations ◽  
Compensation Design ◽  
Airflow Sensor

scholarly journals Research on Temperature Compensation Method in Crankshaft Online Measurement System

2021 ◽  
Vol 11 (16) ◽  
pp. 7558
Author(s):  
Tingting Gu ◽  
Xiaoming Qian ◽  
Peihuang Lou
Keyword(s):  
Ambient Temperature ◽  
Measurement System ◽  
Temperature Compensation ◽  
Compensation Method ◽  
Displacement Sensor ◽  
Online Measurement ◽  
High Precision Measurement ◽  
Temperature Changes ◽  
Dragonfly Algorithm ◽  
Measuring Machine

The crankshaft online measurement system has realized the full inspection function with fast beats, at the same time it requires for high-precision measurement. Considering the effect of ambient temperature and temperature changes on measuring machine, the calibration part, the measured crankshaft and displacement sensor, a temperature compensation method is proposed. Firstly, relationship between calibration part and ambient temperature can be get through the zero calibration. Then use the material properties to obtain compensation values of the calibration part and the measured crankshaft part at different temperatures. Finally, the compensation parameters for displacement sensor can be obtained through the BP algorithm. The improved dragonfly algorithm (DA) is used to optimize the parameters of BP neural network algorithm. Experiments verify the effectiveness of IDA-BP for LVDT in temperature compensation. After temperature compensation, the error range of main journal radius is reduced from 0.0156 mm to 0.0028 mm, the residual error decreased from −0.0282 mm~+0.0018 mm to −0.0058 mm~−0.0008 mm. The influence of temperature changes on the measurement is reduced and measurement accuracy is improved through the temperature compensation method. The effectiveness of the method is proved.

A wide range constant resistance Pirani gauge with ambient-temperature compensation

Vacuum ◽  
1965 ◽  
Vol 15 (1) ◽  
pp. 26-27
Author(s):  
J. English ◽  
B. Fletcher ◽  
W. Steckelmacher
Keyword(s):  
Ambient Temperature ◽  
Temperature Compensation ◽  
Wide Range ◽  
Constant Resistance ◽  
Pirani Gauge

scholarly journals A Temperature-Compensation Technique for Improving Resolver Accuracy

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6069
Author(s):  
Wandee Petchmaneelumka ◽  
Vanchai Riewruja ◽  
Kanoknuch Songsuwankit ◽  
Apinai Rerkratn
Keyword(s):  
Ambient Temperature ◽  
Temperature Compensation ◽  
Temperature Sensitive ◽  
Output Stage ◽  
Current Sensing ◽  
Temperature Variations ◽  
Class Ab ◽  
Experimental Implementation ◽  
Compensation Technique ◽  
Supply Current

Variation in the ambient temperature deteriorates the accuracy of a resolver. In this paper, a temperature-compensation technique is introduced to improve resolver accuracy. The ambient temperature causes deviations in the resolver signal; therefore, the disturbed signal is investigated through the change in current in the primary winding of the resolver. For the proposed technique, the primary winding of the resolver is driven by a class-AB output stage of an operational amplifier (opamp), where the primary winding current forms part of the supply current of the opamp. The opamp supply-current sensing technique is used to extract the primary winding current. The error of the resolver signal due to temperature variations is directly evaluated from the supply current of the opamp. Therefore, the proposed technique does not require a temperature-sensitive device. Using the proposed technique, the error of the resolver signal when the ambient temperature increases to 70 °C can be minimized from 1.463% without temperature compensation to 0.017% with temperature compensation. The performance of the proposed technique is discussed in detail and is confirmed by experimental implementation using commercial devices. The results show that the proposed circuit can compensate for wide variations in ambient temperature.

scholarly journals A Novel Infrared Temperature Measurement with Dual Mode Modulation of Thermopile Sensor

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 336 ◽  
Author(s):  
Chih-Hsiung Shen ◽  
Shu-Jung Chen ◽  
Yi-Ting Guo
Keyword(s):  
Thermal Radiation ◽  
Ambient Temperature ◽  
Temperature Compensation ◽  
Temperature Sensing ◽  
Target Temperature ◽  
Infrared Sensor ◽  
Dual Mode ◽  
Infrared Temperature Measurement ◽  
Chopper Amplifier ◽  
Thermopile Sensor

Superior to the traditional infrared temperature sensing architecture including infrared sensor and thermistor, we propose a novel sensing approach based on a single thermopile sensor with dual modes modulation. A switching and sensing circuit is proposed and realized with a chopper amplifier AD8551 and p-channel MOSFET (PMOS) for switching between detection of thermal radiation and the target and the ambient temperature for compensation. The error of target temperature after temperature compensation is estimated at less than 0.14 °C.

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