The application of remote metering in the calibration work

With the continuous development of science and technology level, modern means of information plays a positive role in all walks of life, in the distance education, remote medical treatment, remote testing, new technologies, such as remote control. In the field of calibration can have such a change? The answer is yes, as long as the modern information technology, such as communication technology, network technology, image, video, voice and multimedia technology, database and Internet technology, combined with a calibration automation technology, can technology developed remote calibration. For many years people's activities always follow a basic model of metering, from central to local delivery, from local to central traceability standard. Therefore lower metering station each year sent ZUI high standards to the superior check, or by the metrological verification institutions to the scene to carry out calibration work. Then through the remote calibration can change this kind of work? And the difficulty of the remote calibration? Key problem is a standard to value physical standard as the carrier, through measuring replicate our physical, calibration of main process need physical standard comparing with physical measurement, and the present information technology is impossible to transfer physical. Some measurement standard in kind as a carrier can exist in the far values, such as on the basis of the prescribed methods and constants of the natural basis and within the same inertial frame frequency standards, based on the time and frequency of duty cycle parameters, based on the relative relationship between the modulation parameters, proportion, the attenuation parameter, phase parameters, noise, etc. Therefore preserved by physical standard is one of the main difficulties of remote calibration value. Calibration of four elements is a standard value, personnel, environment, method, which in addition to the standard can't use the information value means the remote repetition, the other three elements can use modern information technology. With the continuous development of the logistics industry, measurement standard can use means of logistics transportation, so remote calibration can adopt the way of logistics and information flow. The three stages of the calibration is more value, and verify interpretation data maintenance, the current technology is not remote comparison are carried out directly, but can take advantage of the advanced information means to carry out the remote reading data, and remote maintenance inspections. Using the remote technology can also be ZUI throughout the high standards of measurement of measurement standard group, put them through information network linked to the role of the standard group. Don't narrow understanding of remote calibration is far more value directly, in fact as long as the use of modern information means to solve the problem of part of the calibration, to improve efficiency, reduce cost, reduce labor intensity, improve the quality of purpose can be called a remote measurement calibration. This is for an understanding of the concept of remote measurement calibration. Actually remote measuring, remote control, remote teaching, interactive, Shared database of video technology can be used as a remote calibration technology basis as a way to on-site calibration is based on network technology, the remote calibration model is built on the basis of field calibration, the use of network communication and network video means auxiliary field calibration, can rise to reduce staff costs, improve efficiency, guarantee the quality. The present condition of the site measurement calibration is the superior metering station sent commissioner measurement standard instrument to carry to metering station at a lower level and production field, in the form of automatic or manual operation instrument operation, wiring and record data. After the return to the superior metering station interpretation data, signed certificate. Field calibration based on network technology will be the application of network communications and network video means to the on-site calibration, the first use of logistics means, will send to the site measurement standard, through remote training on site through the network video professionals to communicate with the superior metering station, wiring and operation guidance system with the automation function can be directly the data back to the superior, no automation conditions, by the field personnel to operate, camera to read the data back. Technical problems, the superior metering station organization experts to solve through the network video, also can get instrument manufacturer's technical support directly. Has multiple cameras all-sides monitoring site, can gain sufficient technical information. The certificate is superior station sign to complete through the network to the scene. More ways to use the site measurement calibration using portable standard instruments, there is a risk of possible damage on logistics transport links, may also exist that can not correctly quantity at the scene, instability or drift. So its standard instrument can't out for a long time, back to the superior after standing for closed loop testing, qualified to confirm the data. Still have a kind of method is based on process monitoring remote delivery standards, the remote calibration model based on * pattern, on the basis of measurement standard for remote professional design, can solve the problem of the reliability of the measurement standard. Developed transmission measurement standard for easy transportation, ensure the accuracy of measurement, to adapt to the transportation environment, with functions of network communication, so that each of the instrument is calibrated verification through the network interface on the Internet, the advanced instrument manufacturer has taken the Ethernet interface design on the instrument. Network transmission standard is used to pass physical standard of the value, it played a key role in the second way.