Magnet with trolley detector configuration

Parameter group "magnet with trolley"

The system responds to a change in the magnetic field in the sensor's operating range. At the same time, the activation of the magnet is blocked if the metal is simultaneously detected. These functions are intended for detecting magnets when used on an object (for example, cash registers of hypermarkets), in the area of ​​operation of a system of trolleys with an iron structure, since iron has the properties of a magnet.

These parameter groups allow you to adjust the detection of magnets during metal compensation.

• dV - the overall response of the system to the magnetic field with metal compensation
• th - sensitivity detection setting. The parameter values ​​are selected based on the noise level (0.25 ... 10.0)
• K-magnet-2 - the parameter of taking into account the rate of change of the magnetic field
• K-metal, K-metal-2 - the parameters of accounting for changes and the rate of change during the movement of the metal
• Buf size (magnet-2) - the size of the history buffer (5 - corresponds to 0.05 sec) for the analysis of changes in the magnetic field
• Buf size (metal-2) - the size of the history buffer (10 - corresponds to 0.1 sec) for analysis of changes during the movement of metal
• th in delay / th out delay - time setting for detection when dV is exceeded above th and at detection loss at dV is less than th
• delta_i - the indicator variable of the changes during the movement of the metal
• delta_m - indicator variable of magnetic field changes
• state - the state of detection of the magnet with trolley
• counter - the the lifetime magnet events counter.

Figure 1 shows an example of the change in the state of the detection of a magnet (state) in time, depending on the indicator value (dV) and the influence of the tuning parameters (th, th in delay, th out delay).