Analysis of five main techniques of elevator monitoring and controlling
With the rapid rise of intelligent building construction, more and more building 8 storeys. The state expressly provides that the building needs to be equipped with 8 storeys above. The monitoring of the elevator is particularly important. For the elevator monitoring system integrated wiring, how much do we know? In this, the Hangzhou comprehensive wiring analysis of the elevator monitoring and control of the five skills.
First, a video cable out of the elevator shaft location selection: ideal choice should be in wells in the middle, because this well in the accompanying video cable length, only about the depth of the well of a little more than half, the shortest and the introduction of natural disturbances is the minimum; but engineering on the qualification requirements, only look at the situation for and actual project is not allowed.
Second, when the accompanying video cable and other accompanying cable, the designer should fully understand the structure and distribution of other cable, cable should be far away from the current large, high frequency cable, close to the low frequency of the cable bundle; here, even if there is a choice of 1 cm may also strive, because the impact of the size of the interference with the distance of at least square;
Third, camera metal shell, NC head of the shell, the outer conductor of the coaxial cable and other video signals, and the elevator car, rail and other insulation, which should be paid special attention when installing the camera. Camera power supply should be preferred to focus on DC power supply, the second is the choice of car lighting, power can not be used. Power supply, control and other monitoring using cable, as far as possible the use of shielded cable, to prevent the interference signal to leak out.
Fourth, from the elevator shaft to the control center of the video cable, should take the metal tube or metal groove, in order to shield the impact of environmental interference on this part of the cable, and pay attention to this part of the shielding and the shielding of the elevator, should be good electrical connection.
It is understood that the distribution of video signal from the monitoring center to the elevator room to keep a good video interface can be, the elevator room to the elevator car video signal line by the elevator professional manufacturers to complete the wiring (cloth placed along the cable when completed), the elevator construction professional units in the electric elevator room reserved video interface (take the same principles). If you need to install the floor indicator, the need to coordinate professional units in the elevator car reservation 220V power.
Fifth, in the past, in the case of the principle of non understanding, most of the qualifying position and other accompanying cable along with the cable from the top or bottom of the cable. This case, considering only half of the cable is accompanied by movement, partner just fixed extension connection, movement, we put this part called "real cable". This provides a possibility: half of the accompanying movement of the cable only with other traveling cable tied together walk the line; and the other half real cable can choose to walk alone line away from traveling cable method, in the elevator shaft to video line close to the wells Bi vertical alignment, and this part of the cable through the metal tube or metal trough, to shield the interference effect of this part of the cable, more effective. This paper is provided by Shaanxi Electric Communication Technology Co., ltd.. For more information, please visit: http://www.uetx.cc/