The WEARwatcher Main Processing Unit is an edge-processing unit installed on the car top. With a built-in sensor box to detect Acceleration, Distance travelled/ Displacement, Speed, Vibration etc. the WEARwatcher MPU is fitted to the cross head using screw holes in brackets on both sides and powered by 13A socket-outlet (3-pin) provided at the car top.
The WEARwatcher device is able to do predictive analysis via a multi-threading application. The process of the measurement data acquisition reads the sensor data from the different sensors and stores it temporally in real-time. Complex and computationally intensive processes read the ride indices and the acceleration data and evaluate the data. Among other things in this process, evaluations based on ISO18738 (ride quality) and further analyses including frequency analysis are performed. The system is also able to detect abnormalities and defects. The results of these evaluations are sent as notifications to the cloud.
The WEARwatcher satellite (PEU) is installed at the top of the elevator/lift shaft to collect data from sensors at the top of the hoistway and motor room. In case of multiple suspension, the rope load sensors are connected to a PEU on top of the hoistway (usually in the machine room). The PEU sends its data to the MPU, where the complete processing takes place.
The PEU requires a 13A outlet (3 pin) at the top of the elevator/lift shaft. The PEU data is transmitted to the MPU via proprietary 802.11LR protocol for security and reliable long distance communication.
Magnetic Door Switch(es)
The door movement switch(es) are able to detect door status (‘door open’ and ‘door close’). This is used to determine number and time of door movements/cycles and detection of possible jamming doors or defects at the door operator as well as light grids/light barrier. They are mounted at the edge of cabin at door side. The corresponding magnet has to be mounted to the moving part of the cabin door. The door movement switch(es) directly connected to the MPU.
Door Current Sensor
The current sensor is used to detect problems during the actual door cycle on opening and closing. Problems with the drive itself, the door guides and possible contamination that block the door movement are
detected and reported via differences in current data. A status of ‘door is opening’ and ‘door is closing’ can be retrieved from this measurement as well. Sensors are simply placed as a current probe around one of the live cables to the door operator without the cable needing to be cut.
Rope Load Sensor
The Henning rope load sensor LS1 works and is based on a patent protected measuring principle. This proven measurement principle allows the sensor to be fully factory calibrated, and provides an absolute measurement signal. Calibration of the rope load sensor system on site is not necessary. The patented design of the rope load sensor compensates external electrical, temperature and humidity influences. No need for complex calibration on the elevator/lift with weights, making the rope sensor ready for immediate use.
The load measurement sensor consists of one absolute measuring rope load sensor per suspension rope. These load sensors are installed at a 1:1 roped elevator just above the car top and directly connected to the MPU. For a multiple suspension elevator they are located close to the fixing point of the ropes (hoistway top) in the rope section above the car and connected to the PEU.
With connected Henning rope load sensors, the Rope tension software wizard function is included in WEARwatcher and WEARwatcher satellite. This feature can be used to set even rope tension in all ropes. Furthermore WEARwatcher algorithms can detect worn out grooves in traction sheaves.