Research On The Rescue Descending Device Testing Machine Test & Control System

With the Fire Rescue descending device testing machine is dedicated computer numerical control testing machine areas, It can replace the previous artificial field simulation tests, greatly increased testing efficiency, save a lot of manpower and resources, eliminate hidden dangers. Can be measured by the sensor, the computer data processing and output curves of the state, slowly descending to work for the state have a good grasp of product testing to achieve the purpose.With China's rapid economic development, China has more and more high-rise buildings, staff-intensive growing, Once the fire incidents and other emergencies, the traditional fire exits difficult to achieve timely evacuation of the results. As fire emergencies associated with a lot of smoke and other harmful gases, air oxygen content has fallen rapidly, staff may not be enough time to fire exits had been dangerous, Fire and Rescue slowly descending with the installation of windows and other direct close to the external position, do not have access to remote fire exits, So safe. With the Fire Rescue descending device with a simple installation, ease of maintenance, high reliability and can be reused advantages. Taking a panoramic view of the fire with rescue slowly descending on the production, particularly in the production process of product quality inspection process, We and abroad, there is a big gap between the current domestic test is mainly artificial field simulation, This is a waste of human and material resources, there is also a significant security risks, but not for the slowly descending the state always grasp. This paper from the actual conditions of the country, with the Fire Rescue descending device tester functional and performance indicators for the integrated analysis, the integrity of the design, debugging test programs so that the design and verification of compliance with the design requirements, The design issues with theFire Rescue descending device testing machine manufacturers to meet with the Fire Rescue descending device quality test needs, but will also raise the computer numerical control machine domestic, and therefore is of great practical and theoretical significance.This experimental confidential gathering physical quantity has two, one is the pulling force, one is the speed. To address the hardware circuit design. Major work : complete systems with the choice of sensors, signal conditioning circuit design, The completion of data acquisition card interface design, hardware discussed the anti-interference measures. Because the sensor signal conditioning must first be carried out by the data acquisition based accurate, reliable acquisition. This former port handled as signal conditioning, it includes signal amplification, filtering and isolation common functions. System selection in the air velocity sensor output signal generators are 0-20mV scope of voltage signal. Therefore, both the sensor output signal amplification should select voltage amplifier. In this paper we use AD produced a low-price, high-precision, high-gain, Low-power precision instrumentation amplifier AD620 chips, which are used in high-resolution data acquisition system the ideal device. After arrival cable transmission measurement system sensor signal, as measured scene strong electromagnetic interference, sensor itself and enlarge the circuit itself, often containing multiple frequency interference noise signal components, serious cases, the noise will be drowned extraction of the input signal, resulting system is unable to obtain the measured signal, Through low-frequency signal, suppressed or high frequency signal attenuation, the active system design second-order low-pass filter, reduce the filtering software to the requirements of software filtering to reduce the time cost. Because of the real-time requirement is relatively high, and follow-up data processing requirements of the data is relatively large, and the gathering of high accuracy. Taking all these factors, the system decided to adopt PC-7484 data acquisitioncard. Using this data acquisition card ultimate realization of tension and the speed of data acquisition. To improve the reliability of the study of computer detection system of the main sources of interference, paper, anti-interference measures. Then, the thesis research of computer-based test machine data acquisition and processing system used by the data processing methods.Through the use of a simple digital filter after the sample data compose the curve showed a dogleg shape, very smooth. This shows that the sampling data rich high frequency components, noise data still exists. To weaken the disturbances, raising the smooth curve, often must also use sampling algorithm for data smoothing. After digital filtering and smoothing, the data accuracy and reliability has greatly improved and the use of these data for analysis, Find law judge character. In the use of these data systems drawing curves and strike curve parameters.Finally, in order to achieve test microcomputer data acquisition and processing system functions, There is also a need for corresponding software system design. In accuracy, real-time, reliability, expandability may modify, VC + + high-level language design of the software system. System software using a modular design. Two important modules : data acquisition module design was chosen for the high precision to achieve multimedia timer interval sampling, its timing accuracy lms. Data Acquisition Module Design also offered a data acquisition card data acquisition programming. Data processing module design, the software implementation of digital filtering, data smoothing sampling data processing algorithms. To validate this test developed by the microcomputer data acquisition and processing system, a field experiment. Experiments show that the system is reliable and accurate data to achieve a state regulations. Therefore, the completion of this project will have enormous social and economic benefits.