Fence monitoring solution is built to measure the energize pulse voltage in real-time, such that various events on the fence can be detected.
The logic is built such that the pulses generated are acquired by the Lion tracker and analysed. A typical pulse is shown below
The measurement algorithm works by detecting the individual pulses and calculating various parameters:
Detect 5 pulses in 10s and use all measurements from each pulse to calculate the average
Peak is calculated as the average peak value of 5 pulse, shown as a raw value 0-255
Peak values can have quite some noise and may not be the best measure
Energy is calculated as the sum of all samples in a pulse, per pulse average is calculated
Energy is a better value as we are evaluating how much energy is delivered across the fence and is what deters the animals.
Each fence sensor is calibrated to output the same energy level on a reference source. These measurements do not represent measurements in kV and must be scaled to that range in the decoder.
Send to port 93 a 2 byte value with the calibration factor multiplied by 10000; For example, the sensor is returning 1300 (pulse_voltage), we wish to calibrate this to 1800. Calculating from this 1.3846 factor, multiplied is 13856, convert this to hex 0x3616. Send this via downlink. To reset the values send 2 byte value 2710 (hex 0x2710) to port 93.
GPS antenna tuning (1590 MHz in air for resin encapsulation)
add PCB spacers
add tag extension 33,6 mm + tag (don't connect "batt" pins)
add fence addon with 26,6 mm tag extension - for initial fence test, connect the fence addon with wires
add tape underneath the tag to protect holes for programming from the resin
add EMI shield (temporarily attached in one corner)
puncturing of batteries
add battery
fence testing
charging testing
final GPS testing
put the tracker in deep sleep
seal the EMI shield all around with hot glue (the battery should be attached before the glue and the foam protection afterwards)
tape foam protection on the antenova (12x12x17mm)
Januar 2021 batch - disconnect 2.5V / remove resistor
For initial fence test, connect the fence addon with wires. (Jan 2021 - only GPIO1 and GND on lion board)
Do NOT perform the fence test when completely assembled without the resin.
Each fence sensor is calibrated to output the same energy level on a reference source. These measurements do not represent measurements in kV and must be scaled to that range in the decoder.
Send to port 93 a 2 byte value with the calibration factor multiplied by 10000; For example, the sensor is returning 1300 (pulse_voltage), we wish to calibrate this to 1800. Calculating from this 1.3846 factor, multiplied is 13856, convert this to hex 0x3616. Send this via downlink. To reset the values send 2 byte value 2710 (hex 0x2710) to port 93.
aluminium casting mould production
resin casting in the mould
engraving of serial numbers (ProductDeliverySerial-SmartParks Excel Worksheet, use ranger .rld file) and high voltage inscription (power 30%, speed 150 mm/s)
manufacturing of fence monitor cover
engraving of inscription on the plastic cover (laser parameters: power 30%, speed 250 mm/s)
Assembly
Electrolube PU resin UR5528
cca. 75g/piece
Final test
Fence test
Provisioning
Calibrating
Charging