9.3Anti-collisionsystemsSomeanti-collisionsystemsworkusingtheprinciplesof:–sonar;–radar;–lowfrequencynear-fieldinduction.MiscellaneousSonarAlthoughtheprincipleisverygo... 9.3 Anti-collision systems
Some anti-collision systems work using the principles of:
– sonar;
– radar;
– low frequency near-field induction.
Miscellaneous
Sonar
Although the principle is very good, there is the danger with this system
that a strong wind can blow the sonar waves away.
Radar
Radar usually uses advanced microwave or Doppler radar technology
combined with some digital signal processing. Safety circuits are builtin,
and the system can sense objects up to a distance of about 40 m.
The maximum crane travel speed is about 200 mmin.
The radar beam which is sent out will be reflected by solid objects
and will be received by the same radar antenna. It can measure the
distance between two objects and also the speed with which the object
is approaching the sensed object.
Low-frequency near-field induction system
These low frequency systems work at a frequency of approximately 90
to 220 kHz and have a working maximum range of about 30 m. A
transmitter and antenna is installed on the first crane and a receiver and
antenna on the adjacent crane. With this system it is possible to install
three distance steps between the cranes, which should be respected. For
example:
– at 30 m distance an audible signal is given;
– at 20 m distance the crane speed is decreased;
– at 5 m distance the final stop signal is given.
不要机器翻译,通顺流畅点
9.3 Anti-collision systems
Some anti-collision systems work using the principles of:
– sonar;
– radar;
– low frequency near-field induction.
Miscellaneous
防碰撞系统
一些防碰撞系统采用了下列原理:
- 声纳系统;
- 雷达系统;
- 低频近场感应系统。
- 其他系统
Sonar
Although the principle is very good, there is the danger with this system
that a strong wind can blow the sonar waves away.
声纳系统
尽管声纳系统工作原理很不错,但系统的危险性在于强风可能将声纳波吹开。
Radar
Radar usually uses advanced microwave or Doppler radar technology
combined with some digital signal processing. Safety circuits are builtin,
and the system can sense objects up to a distance of about 40 m.
The maximum crane travel speed is about 200 m min.
The radar beam which is sent out will be reflected by solid objects
and will be received by the same radar antenna. It can measure the
distance between two objects and also the speed with which the object
is approaching the sensed object.
雷达系统
雷达系统通常将先进的微波或多普勒雷达技术和一些数字信号处理系统相结合。安全回路内置。该系统可以检测40米左右距离的对象。起重机的Z大行驶速度为200米/分钟。发射出去的雷达波束被固体折射,并且被同一雷达天线接收。雷达系统可以测定两个物体之间的距离,也可以测定一个物体接近另外一个物体的速度。
Low-frequency near-field induction system
These low frequency systems work at a frequency of approximately 90
to 220 kHz and have a working maximum range of about 30 m. A
transmitter and antenna is installed on the first crane and a receiver and
antenna on the adjacent crane. With this system it is possible to install
three distance steps between the cranes, which should be respected. For
example:
– at 30 m distance an audible signal is given;
– at 20 m distance the crane speed is decreased;
– at 5 m distance the final stop signal is given.
低频近场感应系统
这种低频率系统的工作频率约为90-220千赫,Z大有效工作范围约30米。diyi台起重机上安装一套发射器和天线,邻近的起重机上再安装一套接收器和天线。通过这个系统,在两个起重机之间可以实施三步法,这种做法是被公认的。 例如:
–在30米处发出可听信号;
–在20米处起重机减速;
–在Z后5米处发出停车信号。