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Talking about the future of the "one-stop" Elevator Inspection
Currently in the elevator inspection process, there is the risk of being hurt inspectors by many uncertain factors, such as falling damage, mechanical damage, electrical damage and so on. Meanwhile, with the rapid development of computer technology and network technology, the future of the elevator test will be to develop information, intelligence and integrated direction. In this article, the author attempts to break the traditional thinking, thinking the test results to determine whether the use of a single composite indicator equipment, to lift a "one-stop" test.

1 special equipment safety gap detection technology at home and abroad

In recent years, foreign technology in the field of special equipment safety testing to improve detection efficiency and reliability around the emergence of a range of new technologies: (1) Acoustic emission line detection technology; (2) the magnetic flux leakage detection technology; (3) climbing robot automatic thickness measurement technology; (4) pulsed eddy current testing techniques, without going through the insulation condition measurable corrosion metal body; 5) ultrasonic guided wave technology; (6) portable spectrometer; (7) ultrasonic phased array inspection technology and ultrasonic time of flight diffraction (TOFD) detection technology.

China's overall level of safety technology for special equipment needs to be improved: (1) section regulations, standards system is not perfect; large (2) the design, manufacture compared to the overall level of the gap with the industrialized countries; and (3) detection technology can not meet the safety of special equipment needs; (4) life prediction, safety assessment, risk assessment technology foundation is weak, the lack of basic data; (5) special equipment safety condition monitoring, surveillance, emergency rescue, rescue and repair technology needs to be improved; safety (6) Special Equipment T Infrastructure Platform to be consolidated and complemented.

Situation 2 Elevator current test

Although in recent years, the domestic elevator inspection techniques and testing equipment has been rapid development, but compared with developed countries, the overall level of technology and testing methods still relatively backward. According to relevant regulations in force since 2009, has six "elevator Supervision, Inspection and periodic inspection rules", the main content can be summarized as elevator inspection three parts: (1) review the technical data, (2) and zero lift associated facilities member disposed effectiveness and compliance, (3) functional test project. Its method is mainly by visual inspection of the elevator visual inspection, by manual operation of the switch test various functions and the use of steel tape measure, steel ruler, etc. to check by calculation or test the validity of the elevator-related facilities and components installed after the measurement, function switch reliability and size of the various security compliance. By detecting a number of indicators, the final determination whether or not qualified elevator.

3 future of the "one-stop" Elevator Inspection

3.1 Development Trend

Lift detection technology trends should be as follows: (1) improve the accuracy of detection values, reduce uncertainty of the measurement system, improve the effectiveness of the measured value and the actual value consistent; (2) expand detection and diagnosis and detection forecasting capabilities, as well as to improve its functional level; (3) to strengthen research and development simulation testing technology, non-destructive testing techniques; (4) improve the detection technology development services to lift awareness of new technology and services.

3.2 "one-stop" test

I imagine the lift-stop "test, that is" lift detection technology development direction "for the idea, at the same time to meet two conditions: (1) the validity of the detection lift associated facilities and components installed and compliance, (2) function to verify the validity of the test. as such a powerful design, covering the contents of a wide elevator integrated detector, which uses a single composite indicator test results replace the current test results by a number of indicators to determine whether or not qualified elevator.

The instrument consists of two parts this cup: (1) X line scan Zen and measurement devices; (2) computer system. The former is mainly generated by the X-ray beam generator, and a receiver and detectors; the latter includes data acquisition system, a central processing system, console, and so on. In addition, there should be auxiliary equipment, such as monitors, multiple cameras or laser cameras. The equipment works is to use X-ray beam to lift the level of spare parts or other components of a scanning and measurement of the level detector receives through the X-ray into visible light, and then subjected to photoelectric conversion into electrical signals, Finally, via the analog - digital converter into a digital signal, the input computer processing and comparison.

Technical features of the equipment are: (1) scanning level is continuous, and will not miss defects, and three-dimensional reconstruction can be carried out after the record-keeping. (2) Ultra-high-speed scanning time, multi-frame images per second can be obtained, and because the scanning time is very short, the film can be captured images, to avoid artifacts caused by motion. For example, measuring the distance of the car at the bottom of the lowest point of the car bumper, the current between the need to test personnel to enter the pit, and then the car at normal speed down to the bottom terminal of the leveling position, inspectors steel tape measure distance. Thus there is a risk of crushing and shearing. By using this equipment, you can do the elevator is running, the inspector may not be able to know the measurement results of the bottomless pit. At the same time, is connected to a plurality of data lines detected by the computer system and the elevator control cabinet validity test circuit, the test of safety components and functions, according to the microcomputer then reads out the code data of the output plate connected □ analyze their effectiveness.

Of course, before that, the country must first be unified code, so that identity and versatility. For elevator inspection fragmented and complexity of the scene, this device can carry personnel directly in the engine room, outside the hoistway or machine near the elevator and auxiliary facilities overall scanning and measurement. Through data analysis, on the results of the field can be printed out. This makes it possible to detect the instrument speak truly, to exclude the current number of human factors testing process, so that there can be traced and concluded in accordance with the conclusions of fairness, effectiveness, avoid false positives occur.

3.3 "one-stop" test in measurement error analysis

For the use of this detection equipment affect the measurement error data, in the design of the equipment should also consider the following factors when. (1) Factors objects themselves. Material measured object, the optical properties and the like, there is a great difference between the degree of reflection and absorption of light. For example: during the measurement object contour, if the incident light axis normal to the surface of the object to be measured at the point of incidence do not coincide, the scattered light field space distribution changes, resulting in a spot center of gravity shift, which directly affect the measurement error. (2) calibration factors. For the object point to the critical point of a nonlinear relationship as calibration technology is to obtain three-dimensional coordinates of the object. Due to the deformation of the probe and the calibration of the optical system has many desirable assumptions, and therefore will bring some very complex nonlinear system errors affect the accuracy of measurement data. But they have a characteristic that once the system is determined, these factors will determine. Through the system parameters of the actual calibration, these factors can be eliminated or reduced to the extent permitted. (3) The resolution of the camera. The entire measuring system resolution is concerned, it depends on the measuring range. In addition, movement error of the scanning system of the moving means will reduce the measurement accuracy. Therefore, in the laser scanning system, adopt effective methods to reduce the incident light by the beam spot size to refine and improve spot focus depth of field, increasing the aperture, reducing speckle contrast, control light intensity, spot center before extracting the image filtering processing to reduce measurement errors caused by the measured surface characteristics of the object, the center spot extraction algorithm to improve the algorithm to reduce the error to make it with high precision. (4) testability issues. Although in most cases, it can be solved by lengthening the spindle or the use of a plurality of viewpoints scanning way, but in dealing with inaccessible surfaces such as vias and the like, using optical scanning method can not obtain complete sampling data. Blocking problem is due to shading or obstructions caused by the scanning media. (5) The error reference point. In multiple measurements of objects, and then put together a case, the reference point due to errors. Because, even if we set up a feature point feature line feature to flatten the surface, but because of their computing software and several shots in the shooting conditions change, will inevitably produce a certain amount of error. (6) the measuring probe radius compensation errors. (7) surveyors visual and operator error. (8) Data processing error.

4 Conclusion

If the detection equipment can be the development and promotion, not only can greatly improve the detection efficiency and lift the accuracy of test results, can also reduce the risks of detection labor costs and personal injury. More importantly, through the use of new technology (computer technology, high-tech display technology, high-precision sensor technology as well as electronics, optics, acoustics, chemical, mechanical and other principles of combining the integration of technology, etc.), the detection means jumped elevator a new level.