Mounted the load cell at the elevator
head board is a universal weighing method, which installs the load cell in the
middle of two rope heads and detects two weight changes in the car. Pressure
changes to carry out weighing measurements. This installation is characterized
by strong applicability, selection of suitable size, size of the load cell, can
be used for various forms of rope head plate hole weighing.
2.
Load cells installed at the bottom of the
car
A plurality of sensors are placed
between the car and the car frame,
and the load cell and the rubber be integrated or mechanically connected. Then the
car and the load cell actually formed a scale, add the signal of each load cell
together through the circuit, calculate the total weight in the car, this
calculation can overcome the car bias load generated by the error. The
sensitivity of this weighing method is very high, after the system been installed,
the sensitivity is less than 10kg, and because the buffer rubber only play a
connection, the role of shock absorption is not involved in weighing, so the
stability is good, drift is small, it’s suitable for high-grade high-speed
Elevator.
3.
Load cells installed at the car roof
This installation is for large tonnage,
multi-rail design of the ladle weighing. It is characterized by a simple
structure, suitable for large tonnage cargo ladder. The load cell is mounted on
the top axle of the elevator car.
4.
Electromagnetic induction elevator load
cells installed at the live car platform
It calculates the pressure on the
elevator car through the induction magnetic field strength. This is to rely on
the bottom of the elastic rubber compression deformation, the strong magnet
placed in the car under the floor, through the installation of the Hall element
on the car to change its magnetic field changes, after amplification, output the
analog signal, the advantage is that induction, output integration, according
to the need to output different forms of weight signal (current, voltage ,
Switch, serial communication) installation and commissioning is convenient, and
high sensitivity because the Hall element is very small, it can be integrated
with other electronic components into a small control box (and low cost). If
use the serial communication output, can reduce the number of cores with the
cable to save cost for the elevator which is multi-segment switch compensation.
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