Bosch Parking Sensor
- Julie Isebaert
Difficulty: starter
Learning Objectives
After reading this article, you’ll be able to:
Understand how a Parking Lot Sensor works
Interpret how Parking Lot Sensor data shows up on Workplace touchpoints
How does a Bosch PLS sensor work?
Spacewell Bosch PLS sensors uses two independent sensor principles: magnetometer and radar.
Magnetometers detect vehicles by measuring changes in the ambient magnetic field around them. They are perfect for outdoor applications with extreme weather demands.
Radar technology detects moving or stationary (large and predictable) targets. It will function regardless of weather conditions.
As soon as the sensor detects movement in combination with a change of in the ambient magnetic field, the sensor is triggered and a signal is sent to Spacewell Workplace, indicating that this location is now occupied.
Similarly, when the vehicle leaves the parking spot, the movement is detected by the sensor and a message is send to Spacewell Workplace, indicating that this location is now available.
We meticulously check sensor installation to make sure that false-positives (the sensor being triggered but the parking space is not occupied) or false-negatives (the sensor not picking up on a car parking in that spot) are kept to a minimum.
How is Bosch PLS sensor data reflected in Workplace Live Views?
From the above explanation, we know a Bosch sensor is triggered when a vehicle drives over it, and the signal goes up immediately, but only goes down after vehicle departure:
So as soon as occupancy is detected, a signal is send to the Workplace Platform, which will reflect in Workplace touchpoints' floorplans in near-real time: the location occupancy color goes from GREEN to RED almost instantly
Raw data coming in from different occupancy sensors differs greatly in how often they send a message. So the live data Occupancy view (as a default) shows the first 15 minutes after sensor activation. Because cars are often parked for longer than 15 minutes, it’s possible to configure the decay on the live view.
Decay Configuration options
The occupancy decay in the Workplace platform is to indicate that the probability that the location is still occupied is lowering.
In Workplace back-end Studio configuration, you can indicate the icon and set the decay timer per category.
How does Bosch PLS sensor data reflect in Parking Monitor Dashboard?
Overnight, the data is aggregated and we are really able to see how long a parking spot has been occupied.
In the Parking monitor, the data from the sensor is used to indicate if a parking spot was occupied from moment X to moment Y.
More information
Bosch battery life is expected to be 2-3 years. The network quality impacts the battery lifetime significantly. Duration is not guaranteed under poor network conditions. Estimation with the following conditions: Sensor operating under SF7, 200 messages per week including heartbeat/ack, max 200 resets over lifetime, typical operating temperature 15° to 25°C.
Following page provides more insight into how data is saved into the Workplace IoT Platform: https://spacewell.atlassian.net/wiki/spaces/WM/pages/492237
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