The Design of Millimeter-Level Ultrasonic Distance Measurement Circuit

2012 ◽  
Vol 562-564 ◽  
pp. 1260-1265
Author(s):  
Yi Kang Chen ◽  
Zheng Jie Zhang ◽  
Ming Rui Chen
Keyword(s):  
Measurement Error ◽  
Circuit Design ◽  
Temperature Compensation ◽  
Distance Measurement ◽  
Time Interval ◽  
Range Finder ◽  
Measurement Circuit ◽  
Measurement Results ◽  
Ultrasonic Ranging ◽  
Measured Time

By analyzing the causes of ultrasonic distance measurement error, through the use of temperature compensation, and increasing the measured time interval to the microsecond level, ultrasonic ranging circuit can achieve the millimeter level. After the circuit design and construction, the ultrasonic range finder was calibrated from 1cm to 21cm. The measurement results show that in the scope of work, the linearity reached 0.999623; the measurement of the ultrasonic range finder achieved the millimeter level.

An Investigation of Various Factors Affecting Measurement Accuracy of the Tekscan Seat Pressure System

1996 ◽  
Vol 40 (20) ◽  
pp. 1036-1040 ◽  
Author(s):  
Hongzheng Lu ◽  
Gang Lin
Keyword(s):  
Measurement Error ◽  
Contact Area ◽  
Contact Time ◽  
Measurement Accuracy ◽  
Time Interval ◽  
Pressure System ◽  
Factors Affecting ◽  
Measurement Results ◽  
Accuracy Of Measurement ◽  
Pressure Measurement System

This study investigated the following factors affecting the measurement accuracy of the seat pressure measurement system made by TekScan, Inc.: (a) contact time; (b) contact area; (c) the amount of force applied on the pressure mat at the time of calibration and at measurement; and (d) the consistency of contact time before calibration and measurement, and the time interval between calibration and measurement. Results show that the above factors significantly affect the accuracy of measurement. The measurement error can be limited by controlling the contact time for both calibration and measurement to 2 minutes, and controlling the contact area and applied force equally at calibration and measurement.

scholarly journals A System in Package Based on a Piezoelectric Micromachined Ultrasonic Transducer Matrix for Ranging Applications

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2590
Author(s):  
Alexandre Robichaud ◽  
Dominic Deslandes ◽  
Paul-Vahé Cicek ◽  
Frederic Nabki
Keyword(s):  
High Voltage ◽  
Integrated Circuit ◽  
Ultrasonic Transducer ◽  
Ultrasonic Transducers ◽  
Transimpedance Amplifier ◽  
Measurement Results ◽  
Ultrasonic Ranging ◽  
High Voltage Pulser ◽  
Working Frequency ◽  
Simulation Results

This paper proposes a system in package (SiP) for ultrasonic ranging composed of a 4 × 8 matrix of piezoelectric micromachined ultrasonic transducers (PMUT) and an interface integrated circuit (IC). The PMUT matrix is fabricated using the PiezoMUMPS process and the IC is implemented in the AMS 0.35 µm technology. Simulation results for the PMUT are compared to the measurement results, and an equivalent circuit has been derived to allow a better approximation of the load of the PMUT on the IC. The control circuit is composed of a high-voltage pulser to drive the PMUT for transmission and of a transimpedance amplifier to amplify the received echo. The working frequency of the system is 1.5 MHz.

Design of Ultrasonic Ranging Circuit Based on STC Microcontroller

2013 ◽  
Vol 722 ◽  
pp. 59-63
Author(s):  
Rui Luo ◽  
Zi Hong Zhang
Keyword(s):  
System Performance ◽  
Temperature Compensation ◽  
Measurement Accuracy ◽  
Environmental Temperature ◽  
Detection Distance ◽  
Compensation Circuit ◽  
High Measurement ◽  
Ultrasonic Ranging ◽  
Allowable Range ◽  
Market Promotion

In this paper, based on the 18B20 temperature compensation circuit for ultrasonic ranging circuit, can eliminate the influence of environmental temperature on ultrasonic velocity, this paper introduced the ultrasonic ranging system, the system includes ultrasonic transmitting circuit, receiving circuit and display circuit, the results of the experiment show that, the system detection distance can be up to 12M, the error is in the allowable range, the range finder the system performance is stable, high measurement accuracy, distance, has a certain practicality and market promotion value.

Analysis of “Distance-Loss” Model Influence Factors in Vehicular Ad Hoc Networks

2012 ◽  
Vol 490-495 ◽  
pp. 1481-1485
Author(s):  
Jiang Feng Wang ◽  
Xue Dong Yan ◽  
Shuo Nie
Keyword(s):  
Measurement Error ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Influence Factors ◽  
Distance Measurement ◽  
Experimental Sample ◽  
Position Information ◽  
Loss Model ◽  
Accurate Position ◽  
Hoc Networks

In vehicular ad hoc network(VANETs), it is crucial for obtaining more accurate position information which variation rules between “distance-loss” model influence factors and distance measurement error is analyzed. Based on qualitative analysis of “distance-loss” model, field experimental scene and scheme are proposed. Using experimental sample data, the relation of environmental factor and shelter factor and distance measurement error is studied quantitatively. The experimental results show that distance measurement performance of optimized “distance-loss” model is significantly improved, and 6.7% is the largest reduction proportion of distance measurement error.

Distance measurement in desert landform based on ultrasonic ranging system

2017 ◽  
Author(s):  
Xiang-Hui Lv ◽  
Feng-Long Yin ◽  
Hao Hu ◽  
Shi Qiu ◽  
Zhong-Kai Chen ◽  
...  
Keyword(s):  
Distance Measurement ◽  
Ultrasonic Ranging

scholarly journals Calibration of Mangerud'S Boundaries

Radiocarbon ◽  
2010 ◽  
Vol 52 (4) ◽  
pp. 1639-1644 ◽  
Author(s):  
Adam Walanus ◽  
Dorota Nalepka
Keyword(s):  
Measurement Error ◽  
Calibration Procedure ◽  
Radiocarbon Age ◽  
Measurement Results ◽  
Standard Calibration ◽  
Typical Measurement ◽  
Natural Situation

The “calibration” of arbitrarily defined (in some sense, “conventional”) ages, given in conventional radiocarbon years BP, is now becoming necessary because the term “radiocarbon age” is used less often in archaeological and Quaternary practice. The standard calibration procedure is inappropriate here because Mangerud's boundaries are not measurement results. Thus, another approach to the problem is proposed in order to model the natural situation of many, uniformly distributed, dated samples, which should be similarly divided by the original and “calibrated” boundary. However, the result depends on the value of the typical measurement error and is not unequivocal.

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