Step into WOMA Robotic Arm Test Station

That beeping sound you hear while reversing — slow at first, then speeding up, finally turning into a continuous long tone — is familiar to nearly every driver. Yet few stop to wonder: why does it pulse slowly when far, and speed up as you get closer?

The answer lies in the final seconds of product testing. Today we take you to WOMA’s automated test station, to see exactly what a parking sensor probe goes through before it’s fitted onto your vehicle.

一、How to hear the distance？

The sensor emits an ultrasonic beam inaudible to the human ear. When the sound wave hits an obstacle, it bounces back. The system calculates distance based on the round-trip time of the sound wave and alerts the driver to the remaining distance via beeps of varying rhythms.

Therefore, the beep rhythm, volume and clarity are just as critical test items for every sensor as the accuracy of distance measurement.

二、Precision and Reliability for every sensor

On traditional production lines, workers rely on listening by ear and touching by hand to inspect hundreds of parking sensor per day, which inevitably leads to judgment deviations. We have automated this test with robotic arms.

Full inspection: Every single probe, regardless of order volume, undergoes this station 100%.

Consistent cycle time: The full cycle for one probe — picking, clamping, testing and unloading — takes around 15–20 seconds. The robotic arm ensures identical testing position and angle for every probe.

Simulated real reversing scenarios: Reflective targets are placed at standard distances on the station to simulate obstacles at four ranges: 2 m, 1 m, 0.5 m and 0.25 m. The probe shall output corresponding warning beeps at each distance.