Certification in Sensors for Manufacturing Automation

Explore the strain gauge element sensor, which converts strain into resistance changes under tension or compression in a foil or semiconductor. Learn about gauge factor, calibration, and Constantin alloy material.

Attach postage-stamp size strain gauges made of constantan foil or wire to mechanical elements on machine tools or the product to measure strain or displacement using epoxy or cyanoacrylate cement.

Convert strain gauge resistance changes into a voltage with a Wheatstone bridge of R1, R2, R3, and RX, balanced for zero output, while RX changes indicate strain.

Shows how strain gauges measure longitudinal strain, with resistance rising in tension and falling in compression, effective for longitudinal but not lateral strain, 1–30 mm displacement; temperature causes 1% non-linearity.

Examine the industrial construction of capacitive sensors, with a small sensing area guarded within a body, and how grounding the target and approaching it produce signals from a capacitance change.

Discover how a linear variable differential transformer (lvdt) measures displacement from ±2 mm to ~400 mm using a three-coil core, with 0.25% non-linearity, phase-sensitive demodulation, and low-pass filtering.

Operate an injection molding machine to manufacture plastic components, with two-part molds opened and closed precisely. Utilize lvdt sensors to control feeding, hydraulic, and pneumatic actuators for accurate movements.

Explore the rotary variable differential transformer (RVDT) and how rotating cardioid-shaped magnetic cores produce output voltage from varying overlaps with secondary coils, indicating angular motion.

Detect conductive materials with eddy current proximity sensors by using an alternating current in a coil to generate magnetic flux, induce eddy currents, and change impedance to trigger a switch.

Explore inductive proximity switches and their lc oscillation circuit that detects metallic objects. A coil on a core changes inductance to trigger the switch via a signal evaluator and amplifier.

Explore optical encoders for measuring angular motion using a perforated rotating disk, led light source, and three offset tracks to determine direction and compute angular velocity.

Optical encoders convert angular or linear displacement into digital output using a perforated disk or punched strip. Pulses indicate angular velocity and form a binary code for microprocessor applications.

Explore how pneumatic sensors use compressed air to measure displacement or detect proximity, converting flow obstruction into pressure changes that trigger signals without rotating parts or electrical circuits.

Explore pneumatic sensors and their applications in manufacturing, from detecting product orientation on conveyors and edge monitoring of fabric to counting boxes via pressure signals for microprocessor control.

Explore how proximity switches operate on electrical contacts, with lever, roller, and cam configurations, and how reed switches enable rpm measurement and automatic conveyor control.

Hall effect sensors use a magnetic field to deflect charged particle paths, generating Hall voltage that enables proximity sensing, amplified by an operational amplifier.

Explore the applications of Hall effect sensors for displacement and proximity sensing, with non-contact operation, signal conditioning circuitry, and high frequency up to 100 kHz.

Use a hall effect sensor to monitor and control petroleum fuel levels inside a closed container with a float and magnet, generating hall voltage pulses to signal pump actions.

Integrate an LVDT sensor with bellows for more precise pressure measurement. As pressure rises, bellows expand, moving the iron rod to generate EMF proportional to displacement and pressure.

Discover piezoelectric sensors that generate electric charge and voltage under pressure or strain in ionic crystals. Measure force, pressure, and acceleration, with emf proportional to the applied force.

Monitor temperature with sensors to reveal how heat changes material state, dimensions, and electrical resistance, using bimetallic strips, thermocouples, and thermistors in casting, molding, and metal cutting.

Regulate furnace heating with bimetallic strips acting as a thermal switch, bending due to different expansion coefficients and closing a circuit that signals a microprocessor to cut power.

Explains resistance temperature detectors (RTDs) that increase resistance with temperature in nickel, copper, or platinum. Describes using a Wheatstone bridge and signal processing to convert resistance changes to voltage.

Explore light sensing in automation with photoresistors, or light dependent resistors, made from cadmium sulfide. See how photoconductivity lowers resistance with light, enabling use in displays, barcode scanners, and robotics.

Explore photodiodes as solid-state detectors that convert incident light into current via a pn junction. Use them in cameras, medical scanners, and automation where photons above 1.1 eV generate current.

Identify the measurement type and nominal value, assess range, accuracy, and speed, and evaluate reliability under environmental conditions like dirt, temperature, and humidity to select a sensor.