Applied Mechanics and Materials Vol. 678

Abstract: As there may be measuring errors caused by elasticity of measuring tools, uneven fields and man-made interface, thus impacting scientificity and fairness of contests when adopting manual measurement in shot contests, this article puts forward apply monocular vision measuring technique to achievement measure based on domestic and international research status of monocular vision measuring technique and combines characteristics of shot fields to propose an approach to measure throwing range with plane calibration. The experiments proved that this approach is feasible in throwing events.

Abstract: For the reasearch of magnetic memory testing parameters on the effect of magnetic memory testing signals, the method of uniform design experiment is used to arrange test, by the decision criteria of the minimum component change of magnetic field, the mathematical model is established based on the test result, quantify the influence of the magnetic memory testing parameters, and optimal regression equations are verified through the test results, and achieve the optimization of test parameters, the results for the determination of magnetic memory testing parameters and the range of choice to provide theoretical reference, and improve the reproducibility of test results.

Abstract: Estimating the radiation sensitivity and radiation response of individual electronic units embedded in System on chip (SoC) is important for SoC error rate predicting and fault tolerant system designing. In this paper, the experimental techniques for detecting the single event effects (SEE) of SoC were introduced. The test system has been established and the irradiation experiments have been performed for testing SEE of Xilinx Zynq-7010 SoC with ²³⁹Pu alpha radiation source. Several single events functional Interrupt (SEFI) of some typical registers within the SoC sample were detected after receiving the total fluence of 6.101. In the end, the mechanisms of SEFI induced by alpha irradiation on SoC were discussed and analyzed.

Abstract: The effects of atmospheric particulates were more prominent in recent years, so accurate monitoring of particulate matter was a problem needed to resolve. In the existing particulate monitoring instrument based on the principle of Tapered Element Oscillating Microbalance method (TEOM),the particle concentration detection system was tapered quartz tube simple harmonic oscillator. Due to the oscillator relying mainly on analog circuit closed-loop self-excitation oscillator to drive, loop resonance frequency, oscillation stability and Q value was greatly influenced by the oscillator physical characteristics and the interference of mechanical structure and circuit design parameters. And oscillation frequency must be read by the digital circuit frequency detection system, then figured out the corresponding quality. In this paper, we studied a kind of composite oscillator tube which can overcome the lack of stability in the existing technology and reduce the impact of coexistence at the same time of digital circuit and analog circuit. And oscillator frequency step precision raised almost an order of magnitude compared with the national standard detection accuracy of 10ug.

Abstract: For the issues of expensive price, cumbersome operations and bad portability, we designed a wireless, wearable and multi-parameter exercise physiological monitoring system with low mental loads. This system could perform the real-time, continuous and long-term monitoring for the parameters of ECG, respiration, body temperature and body movement of the person under monitoring in the motion state to realize wireless transmission of data. The test result showed that the operation of system is stable, safe and reliable to monitor the physiological status of the testee on a precise, real-time and ongoing basis.

Abstract: The bubbles in the liquid will scatter and absorb the ultrasound, therefore the existence of bubbles will seriously affect the ultrasound propagation in the liquid medium inside the pipeline. This paper analyzes the influence of bubbles in the liquid on the performance of the ultrasonic flow meter, and the gas-liquid two-phase flow rate measurement experiments are implemented. Experimental results show that with the increase of the bubble volume fraction in the liquid, the measurement error of the ultrasonic flow meter increases. When the bubble volume fraction exceeds 1%, the transit-time difference method of measuring the flow rate is nearly useless.

Abstract: In this paper, the artificial compound eye vision system is used to develop an effective algorithm for acquiring 3D information of object. According to compound eye vision system constructed, the imaging principle and correlation between the object point and the imaging point is analyzed. Then the cross correlation matching algorithm is present to extract the depth and obtain the 3D information. The influence factors such as number of matched elemental images and matching window size are considered and analyzed. The experimental is implemented to verify the validity of the proposed method.

Abstract: In order to acquire large traffic data, a wireless vehicle detector based on anisotropic magnetoresistive sensors and ZigBee technology is design. The principle, system design and software design are introduced in detail. The experiment result shows that the wireless vehicle detector can detect the presence and the driving direction of a vehicle. Make further effort, the speed of a vehicle can be estimated. The vehicle detector will be widely applied with its easy installation and high performance.

Abstract: The automatic monitoring and control method for aerosol cultivation of lettuce was proposed by real-time monitoring and automatic control of the cultivation environment, on-line detection and automatic control of nutrient solution, and the combination of field control and remote control, which has realized the intelligent management of aerosol cultivation of lettuce based on plant factory. The monitoring and control system of aerosol cultivation, the control model for the spray frequency of nutrient solution and the fuzzy control method for the pH value control of nutrient solution were introduced. The control system has been applied in the agricultural science and technology park, and the results show that the aerosol cultivation of lettuce has advantages over the traditional method.

Abstract: This article points out the views from “Software manufacturing Instrument” to “Software manufacturing Everything” and to “software rebuilds, rules, and defines the world ” , as well as shows the agreement and support at home and abroad to “Software manufacturing Everything”. Software is the crystallization of human’s intelligence, and the new wave of software has become the main competitive force of mainstay industry. This article also provides the consequence that the DASP of COINV measured , an the accuracy reached 10^(-17).