Abstract:The flue gas emitted from stationary pollution sources has greatly increased pollution to the environment , and it is very important to scientifically monitor the flue gas. In the paper, the authors introduce the status of the on-line flue gas monitoring systems, including automatic air quality monitoring system (AQMS), continuous emission monitoring system (CEMS) based on differential optical absorption spectroscopy(DOAS), on-line wireless sensor network monitoring system under the internet of thing .The structure of every on-line flue gas monitoring system, technical specification, practical applications and development direction have been described. And the relationship between the on-line gas monitoring systems and meteorological systems is discussed in this paper.

Abstract:A dynamic encoded target based on stroboscopic information is proposed for meeting the demand of coded targets in the dynamic measurement of machine vision.The dynamic encoded targets flicker according to the fixed frequency in the measurement.The flicker frequency of targets are used to encode information.The dynamic encoded targets consist of static location features and dynamic coding features.The static location features is used to recognize the position of dynamic encoded targets.The coded information is stored in the dynamic coded features.The detection and decoding algorithm of dynamic encoded targets are designed based on the dynamic coding structure to realize rapid recognition of targets.The experimental results of the extraction of dynamic encoded targets show that the proposed targets with dynamic coding information can be steadily extracted and they are easy to arrange and identify.Thus,the dynamic encoded targets can satisfy the requirements of dynamic visual measurement.

Abstract:This article introduces a measuring method based on Unified Spatial Metrology Network (USMN).In large-scale engineering measurement, one instrument in one position cannot fulfill the task.Moving instrument to different positions or more than one instrument is needed. Instead of accumulating error by Best-fit in traditional way, the USMN can reduce the cumulative error by redistributing the weights of fitting elements. Therefore it increases the accuracy of multi-station measurement method? and provides an effective means in large scale engineering measurement. By comparing and observing the close degree of endˉtoˉend and changes in radial direction of two methods, the USMN has been found closer to real situation than the traditional one.

Abstract:There are two types of passive positioning:single-station passive positioning and multi-station passive positioning.Based on the analysis of several methods of passive positioning, a new method combining binocular vision and motion vision is proposed, which belongs to the singleˉstation passive positioning.Relevant equipment is designed and the distance calculation algorithm is realized in engineering.It is proved that this equipment can realize the real-time passive positioning of multiple flying targets in air.The accuracy of this method is approximately ±10% of the target distance.

Abstract:A novel digital collimation telescope with self-calibration is presented. By combining micrometric collimation telescope with CCD camera which is used to collect the visual field of the micrometric collimation telescope instead of eyes, it realizes measurement in the whole digital visual field. Through the calibration of the CCD camera's angular equivalent and position equivalent, the positions and angles can be calculated directly. The experimental results show that the position uncertainty of the system is superior to a laser tracker; the angular uncertainty of the system is superior to a theodolite. Therefore, the digital collimation telescope can be used for industrial large-scale measurement.

Abstract:To solve the problem of Energy Management Unit (EMU) of electric vehicles, we develop an automatic test system. MCU of Frescale MC9S12 series is used as master chip. Upper computer, lower computer and unit to be tested are connected with CAN. 6 different tests of unit and its 4 types of PCBA can be tested by automatic test system. The test items can be configured highly flexible. Upper computer software shows the test results in real time, saves the data to the database and creates the Word table. After the early testing, all tests of one kind of PCBA can be finished in 1 minute. The absolute error of the automatic test system is less than 0. 05V,? and its fault detection rate is 100%.

Abstract:A relative attitude measurement system for warship weapons reference is introduced in this paper, the composition of the system is described. The measurement system is precisely tested, and data compensation is made. The test accuracy, after compensation, is better than before. The measurement system can measure the relative attitude of the two platforms in real time,and the PC software has the function of real-time displaying,monitoring and automatic saving of measurement data.?

Abstract:In view of the problems existing in the testing of photoelectric encoder,,a corresponding detection device is developed, and the test methods are expounded. The advantages of the detection are: small volume,convenient operation, fast testing and digital tube display of the results. All the testing items can be done, therefore, the requirements for the rapid?comprehensive and accurate photoelectric encoder testing can be achieved.

Abstract:Fiber grating technique has gained more and more application in various fields as its rapid development.An F-P filter is the core component of a fiber interrogator based on F-P technique.There will be non-linear and ringing phenomena in the high-speed driving circuit for the F-P filter. This paper presents one scheme to the circuit design based on OPA552 and audions.Thrugh the circuit simulation and experimental erification,his design scheme can solve the problems in the high-peed driving conditions.

Abstract:The cutoff-wavelength measuring methods of polarization-maintaining optical fiber (PMOF) has been investigated and the implement method has been presented.The established the cutoff-wavelength measuring device for the PMOF has realized the measurements of the fast- and slow-axis cutoff wavelength for some kinds of PMOF,? respectively, By the validation experiment,?The principle factors which influence the cutoff-wavelength measuring results have been analyzed. The built measuring system has certain significance on the relevant tests operated by those who study and manufacture the PMOF.

Abstract:The accuracy and reliability of differential pressure at high static pressure have great influence on the development quality of pressure measuring device. This paper mainly describes fundamentals of differential pressure transducer and problems in the process of its calibration,? and analyses several calibration methods for differential pressure at high static line pressures,? especially introduces dual piston model and divider model. Based on experimental data,it analyses the influence of static pressure on differential pressure transducer.?

Abstract:This article is to solve aviation ARINC825 bus device calibration problem in high-speed transmission mode. Aiming at the bus transmission and reception characteristics, calibration items and method are proposed. Using normal standard instruments, the parameters of the bus device are traceable to national standards in order to ensure unity of value for bus port parameters. And the method based on ARINC825 bus devices calibration is provided.

Abstract:This paper introduces a kind of automatic verification method of measuring instrument with no computer input and output I/ O interface.Their representative is the pointer meter and a simple digital meter. Introduced the key problem to realize the automatic recognition of meter indicator based on computer vision system,And then through GPIB interface connected to the verification system implementation standard output value of automatic acquisition ? result judgment? data storage other work,improving the accuracy of the verification work,reduce work intensity of the verification.

Abstract:The mathematical model of surface temperature sensor in a step change surface temperature measuring device is established.The influence of the thermal conductive plate on the time constant of measured surface temperature sensor is analysed,through the mathematical simulation and calculation of surface temperature sensor at different time constants, it is concluded that when the time constant of thermal conductive plate is 20 times greater than that of the measured surface temperature sensor, it can be ignored that the influence of the thermal conductive plate on the time constant of measured surface temperature sensor.

Abstract:This paper, for the crossover position deviate fault of a certain type of pendulous accelerometer,? analyses the mechanism through the fault tree diagram analysis and makes experimental verification, It has concluded that the output of crossover position deviation is resulted from the symmetrical coil deformation of signal sensor of the pendulous accelerometer,it has proposed the corrective and preventive measures in this paper.

Abstract:The microcator is a tool to measure the micro displacement.It can be used in various fields. The article introduces the repair method of microcators and it mentions the precautions in the repair process.

Abstract:The structure of the CTJ07 type optical theodolite test bench by its own reason cannot satisfy the requirement of JJG949-2011"theodolite verification device verification regulation”,therefore,? facing scrapping. In this paper,the retrofit scheme is analyzed,and the improvement method is detailed. The modified CTJ07 type optical theodolite now can satisfy the user’s requirement.

Abstract:This paper presents a method using VBA as a platform for research and development of micrometer calibrating certificate recording system (MCCRS) .It introduces the structure of the system and details the design of several key modules and the error proofing function of the system.The research and development of the MCCRS can reduce the workload,put an end to the artificially generated accidental errors and improve the labor efficiency.

Abstract:The paper introduces an automatic freezing and saving device in the water triple point cell for CIMM-TH-0230.The reproducibility of the temperature plateau in the water triple point cell is studied with the device,and the performance of the device is evaluated.The test results show that: the change in the temperature plateau of the triple point of water with the freezing device is not more than 0.2 mK within 48 h;the reproducibility is less than 0.06 mK; the repeatability is better than 0.5 mK;the temperature differences between different cells are not more than 0.4 mK. According to the test results,the device is suitable for freezing,saving and reproducing of the water triple point cell.