Instantaneous Multi-Point versus Single-Point Measurement of Exhaust Port Hydrocarbons of Ultra Lean Mixture

2000 ◽  
Author(s):  
Jeremy Lawrence ◽  
Harry C Watson
Keyword(s):  
Single Point ◽  
Exhaust Port ◽  
Lean Mixture ◽  
Point Measurement ◽  
Point Versus

Laser Timing Probe with Frequency Mapping for Locating Signal Maxima

2009 ◽  
Author(s):  
L.S. Koh ◽  
H. Marks ◽  
L.K. Ross ◽  
C.M. Chua ◽  
J.C.H. Phang
Keyword(s):  
Response Time ◽  
Continuous Wave ◽  
Single Point ◽  
Point Measurement ◽  
Cw Laser ◽  
Measurement Capabilities

Abstract A Laser Timing Probe (LTP) system which uses a noninvasive 1.3 µm continuous wave (CW) laser with frequency mapping and single point measurement capabilities is described. The frequency mapping modes facilitate the localization of signal maxima for subsequent single point measurements. Measurements of waveforms with long delays and 50 ps response time from NMOS and PMOS transistors are also shown.

Probe Mobile Device Design Based on a Weak Magnetic Detection Technology

2014 ◽  
Vol 800-801 ◽  
pp. 771-775
Author(s):  
Feng Yun Yu
Keyword(s):  
Mobile Devices ◽  
Mobile Device ◽  
Simple Structure ◽  
Single Point ◽  
Dual Use ◽  
Point Measurement ◽  
Screw Drive ◽  
Detection Technology ◽  
Transmission Part ◽  
Magnetic Detection

Design and calculation of dual-use spiral mobile devices for horizontal and vertical, according to the principle of screw drive meet the needs of the weak magnetic detection technology. The device consists of the support part, guide part and transmission part, simple structure, may be supporting the use with weak magnetic equipment for the handheld single point measurement, and drive probe mobile to complete the measurement and maintained liftoff value unchanged in mobile. Carry on a large number of weak magnetic detection experiments using the device, the results proved that this probe mobile device easy to use, reliable mobile precision to meet the testing requirements.

Parameter Calibration Method Based on Screw Theory for Articulated Coordinate Measuring Arm

2011 ◽  
Vol 189-193 ◽  
pp. 4049-4052
Author(s):  
Kui Huang ◽  
Rong Guang Liu ◽  
Jian Sheng Wu ◽  
Xin Rong Lao ◽  
Jian Hua Mo
Keyword(s):  
Error Correction ◽  
Screw Theory ◽  
Single Point ◽  
Kinematic Model ◽  
Calibration Method ◽  
Error Correction Model ◽  
Kinematic Parameters ◽  
Correction Model ◽  
Point Versus ◽  
Accuracy And Repeatability

To improve the measurement accuracy of the articulated coordinate measuring arm (ACMA), the measurement system’s parameters must be calibrated. The mathematical model and the disturbance of the kinematic parameters’ error are critical to the calibration precision. In this paper, product-of-exponential(POE) model is adopted to establish the kinematic model of the ACMA, and an error correction model which utilizes single-point versus multi-pose and the distance between every two points is used to take accuracy and repeatability into account. Then, genetic algorithm is utilized to optimize the error correction model in order to identify kinematic parameters. Experimental results reveal that the proposed calibration method is feasible.

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