SensComp News: Ultrasonic Sensor Blog & Updates

Polaroid camera with electrostatic ultrasonic sensor

The Polaroid Ultrasonic Sensor: From Camera Autofocus to Industrial Sensing

The Polaroid ultrasonic sensor was an electrostatic ultrasonic transducer developed in the 1970s to focus Polaroid’s instant cameras automatically. It first shipped in the SX-70 Sonar OneStep in 1978. Polaroid’s OEM division later supplied the same transducer to industry, where it became a standard in robotics research. SensComp acquired that division in 2002 and remains

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Understanding What’s in the SensComp OEM Kit: Components and Specifications

For OEMs building motion detectors, data-collection probes, and student distance sensors, four component-level decisions determine whether the finished product survives a real classroom or comes back as a warranty return. Students never see any of it — they see the plot on the screen — but the transducer, drive electronics, and connection hardware under the housing are what separate a tool students trust from one the instructor spends half the period recalibrating. Here’s your guide to choosing ultrasonic sensors for classroom science products.

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Why Grain Bin and Tank Level Sensors Give False Readings — and What Actually Fixes It

Most false level readings trace to one of a handful of causes, and only two of them are solved by changing the sensor. Sorting the symptom first saves a lot of ladder time. Key answers at a glance Why does a bin read empty when it is full? The return off the peak of a

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Reliable Patient Presence Detection at Self-Service Health Screening Kiosks

Ultrasonic sensors handle kiosk presence detection with no camera. See how electrostatic ultrasonic transducers read soft targets like clothing and skin.

Reliable Patient Presence Detection at Self-Service Health Screening Kiosks Read Post »

Electrostatic ultrasonic sensors using, multifrequency operation in a noisy environment.

How Multifrequency Operation Reduces False Ultrasonic Sensor Readings in Noisy Environments

Ultrasonic sensors can misfire in acoustically noisy environments, reporting obstacles that aren’t there when air brakes, machinery, whistles, or even animals put stray ultrasonic energy into the air. One effective way to reject that noise is multifrequency operation: transmitting a short stepped burst of several frequencies as a unique signature, then accepting only the echo

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Aerial view of a farm field with sound waves illustrating electrostatic ultrasonic sensing in agriculture.

Why Piezoelectric Sensors Struggle in the Field: The Engineer’s Guide to Agricultural Sensing

Electrostatic ultrasonic sensing gives agricultural equipment one rugged transducer for boom height control, tank level, and grain bin monitoring: detecting soft crop canopy, holding accuracy from -40°C to +85°C, and surviving chemical spray, in conditions where piezoelectric ultrasonic sensors lose the signal.

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Adjusting the BINH on an electrostatic ultrasonic sensor to decrease the dead zone

What Determines How Close an Ultrasonic Sensor Can Detect: Inside the Dead Zone

Minimum range is not a fixed property of a sensor. It is set by the blanking interval the electronics impose — and by whether the transducer stops ringing fast enough to let you shorten it.

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Ski run with tracked fresh powder below a chairlift, where electrostatic ultrasonic transducers track snow depth

How to Measure Snow Depth Accurately in the Field with Ultrasonic Transducers

Electrostatic ultrasonic transducers measure snow depth reliably in unattended installations for weather stations, avalanche monitoring, ski slopes, and hydrology networks — resolving faint echoes off loose powder, holding accuracy in freezing dry air, and running for extended periods without recalibration. KEY ANSWERS AT A GLANCE Can ultrasonic transducers measure snow depth reliably? Yes. Electrostatic ultrasonic

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Electrostatic ultrasonic transducers measuring fill level on a hopper loader.

Load and Material-Height Sensing on Haul Trucks, Hoppers, and Loader Buckets

Electrostatic ultrasonic sensing measures irregular material heaps from vibrating mobile equipment — through airborne dust, with the receive sensitivity to hold a dependable overfill threshold on loose bulk material, and with clear limits on temperature and moisture that belong in the design from the start.

Load and Material-Height Sensing on Haul Trucks, Hoppers, and Loader Buckets Read Post »

Autonomous Guided Vehicle (AGV) on factory floor

Ultrasonic Sensor Performance Characteristics for AGV and AMR Applications

Electrostatic ultrasonic sensing gives AGVs and AMRs the range, accuracy, and soft-target sensitivity that collision avoidance and precision docking require — from 1 inch to 40 feet with appropriate drive electronics, within about ±1/8 inch at close range, with beam patterns matched to warehouse aisle geometry.

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