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.

Design of Ultrasonic Ranging Alarm Device Based on SN8P2501B

2014 ◽  
Vol 538 ◽  
pp. 344-347
Author(s):  
Pan Feng Zhang ◽  
Ling Kun Ma ◽  
Hui Zhen Li
Keyword(s):  
Sound Velocity ◽  
Temperature Compensation ◽  
Time Base ◽  
Practical Application ◽  
Compensation Circuit ◽  
Environment Temperature ◽  
Ultrasonic Ranging ◽  
Ultrasonic Emission

Introduced one ultrasonic ranging alarm device based on SN8P2501B microcomputer, it mainly included ultrasonic emission circuit, receiving circuit, keyboard, alarm circuit and the software. Compared with the traditional ranging methods, the system used 555 time-base circuit to produce ultrasonic, and designed a temperature compensation circuit to eliminate effect of sound velocity produced by the environment temperature. The practical application results show that the ranging system is stable , reliable and highly accurate, so the technology and methods adopted in the system are highly practical and worthy of being used abroad.

Temperature-compensation Circuit Techniques For High-density CMOS DRAMs

2005 ◽  
Author(s):  
Dong-Sun Min ◽  
Dong-Soo Jun ◽  
Sooin Cho ◽  
Yongsik Seok ◽  
Youngrae Kim ◽  
...  
Keyword(s):  
Temperature Compensation ◽  
High Density ◽  
Compensation Circuit ◽  
Circuit Techniques

Optic Method to Measure the Density of Gas and the Analysis on Uncertainty of Measurement

2011 ◽  
Vol 361-363 ◽  
pp. 226-231
Author(s):  
Chang Li Guo ◽  
Yan Qing Zhang
Keyword(s):  
Refractive Index ◽  
Measurement Accuracy ◽  
Uncertainty Of Measurement ◽  
Interference Theory ◽  
Interference Fringes ◽  
Air Chamber ◽  
High Measurement ◽  
Wedge Structure ◽  
High Measurement Accuracy ◽  
Optical Wedge

A optic method to measure the density of gas is put forward. That is, by using the optical Wedge structure to build air chamber and chamber for gas under test, and by measuring the differences of the optical Wedge interference fringes of the two rooms, the density of gas has been measured. The interference theory of Wedge has been theoretical analyzed, and a formula which can be used to measure the refractive index of gas is put forward, and the uncertainty of the measurement has been analyzed. The parameters of gas density, refractive index and gas thickness have been used in the formula. The results show that the method of optical Wedge interference is practical, and high measurement accuracy is achievement when the density of gas is high.

Design of Automobile-Reversing Radar Control System Based on Ultrasonic

2013 ◽  
Vol 457-458 ◽  
pp. 872-877
Author(s):  
Yan Xin Yu ◽  
Rong Chun Sun
Keyword(s):  
Control System ◽  
Software Design ◽  
Temperature Compensation ◽  
Modular Design ◽  
Design Method ◽  
Main Program ◽  
Single Chip ◽  
Compensation Circuit ◽  
Program Module ◽  
Function Modules

Based on the principle of ultrasonic transit time ranging, this article describes that the microcontroller is used as the core to develop the ultrasonic distance-measurement automobile-reversing radar control system. The system includes both hardware and software parts. The hardware part mainly consist single-chip control circuit, ultrasonic transmitting and receiving circuits, temperature compensation circuit and voice alarm circuit. The software design part of the system was divided into several function modules with modular design method, such as main program module, temperature measurement module, voice alarm module and so on. The main program was responsible for dispatching management all the modules. Experiments show that this system can reach design requirement and has high value and broad application prospects.

An on-chip temperature compensation circuit for an InGaP/GaAs HBT RF power amplifier

2011 ◽  
Vol 32 (3) ◽  
pp. 035009
Author(s):  
Chengzhan Li ◽  
Zhijian Chen ◽  
Jiwei Huang ◽  
Yongping Wang ◽  
Chuanhui Ma ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Temperature Compensation ◽  
Rf Power ◽  
Compensation Circuit ◽  
Rf Power Amplifier ◽  
Chip Temperature ◽  
On Chip

scholarly journals A Sensing Peak Identification Method for Fiber Extrinsic Fabry–Perot Interferometric Refractive Index Sensing

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 96 ◽  
Author(s):  
Bowen Yang ◽  
Biyao Yang ◽  
Ji Zhang ◽  
Yiheng Yin ◽  
Yanxiong Niu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Measurement Accuracy ◽  
Measurement Range ◽  
Superior Performance ◽  
Refractive Index Sensing ◽  
Identification Method ◽  
Peak Identification ◽  
Fabry Perot ◽  
High Measurement ◽  
Lateral Offset

A novel sensing peak identification method for high accuracy refractive index (RI) sensing is proposed. The implementation takes the intensity of interference maximum as the characteristic to distinguish interference peaks, tracking the sensing peak continually during a RI changes, with high measurement accuracy and simple computation. To verify the effect of the method, the extrinsic Fabry–Perot interferometer (EFPI) sensor has been fabricated using the large lateral offset splicing technique. In the RI range from 1.346 to 1.388, the measurement range of the EFPI with the proposed method reaches at least 6 times larger than that of EFPI with the wavelength tracking method and the largest measurement error is −4.47 × 10−4. The EFPI refractive index (RI) sensor identified the sensing peak is believed to play an important role in RI, concentration and density sensing, etc., for superior performance.

Online Measurement for the Thermal Geometric Parameters of Hot Large Forgings

2013 ◽  
Vol 421 ◽  
pp. 453-458
Author(s):  
Wei Liu ◽  
Zhen Yuan Jia ◽  
Ming Xing Li ◽  
Yang Liu ◽  
Yang Zhang
Keyword(s):  
High Temperature ◽  
Measurement Accuracy ◽  
High Efficiency ◽  
Geometric Parameters ◽  
Measurement Time ◽  
Feature Lines ◽  
High Measurement ◽  
High Temperature Components ◽  
Online Detecting ◽  
Geometry Characteristic

t is difficult to obtain high measurement accuracy in online detecting the thermal geometric parameters of hot large forgings, based on machine vision method. In this paper, firstly, a spectrum selective image acquisition method for high-temperature components is proposed, which can successfully reduced the effect of high temperature on image quality. Then, a measurement method based on the coding feature lines for geometric parameters of hot large forgings is employed, which can effectively improve the extraction efficiency of geometry characteristic information of high-temperature components. Experiments on the forging workshop show that measurement accuracy of diameters for cylindrical forging reaches 0.2% and the measurement time is 2.25 seconds; measurement accuracy of lengths for cuboid forging reaches 0.48% and the measurement time is 5.9 seconds. The experimental results have verified the feasibility and high efficiency of the proposed method for measuring the geometric parameters of hot large forgings.

Developing passive MEMS DC/AC current sensor applicable to two-wire appliances with high measurement accuracy

2016 ◽  
Vol 120 (16) ◽  
pp. 164506 ◽  
Author(s):  
Dong F. Wang ◽  
Xiaodong Li ◽  
Weikang Xian ◽  
Huan Liu ◽  
Xin Liu
Keyword(s):  
Measurement Accuracy ◽  
Current Sensor ◽  
High Measurement ◽  
Ac Current ◽  
High Measurement Accuracy
Sign in / Sign up

Export Citation Format

Share Document