The functional principle behind the capacitive analog position pick-up is similar to that of a capacitive proximity switch. It detects objects which are within its response range without touching them. The function is based on the effect on the electric field in the vicinity of its 'active sensor surface'. The basic structure of the sensor consists of an oscillator, a demodulator, the linearisation network and the controlled current source.
The criteria for an analog evaluation are the material properties, the size of the object involved, and its distance from the 'active sensor surface'. For objects deviating from the standard target, the maximum working distance is reduced.
In actual operation, the optimum calibration to be performed from the rear of the housing over a trimming potentiometer is signalled to the user by the adjacent LED. As a further special feature, this LED also signals if the load impedance at the output is too high or non-existent.
Advantages of the capacitive analog pick-up
The capacitive analog sensor scans objects without contact. This means that the object scanned is not subjected to any mechanical wear and tear. Nor do colours and surface roughness have any negative effect on the measured result. In the case of differing object materials, the output signal deviates from the standard output signal of 4-20 mA, and can be returned by a simple-to-perform user calibration procedure to the standard output signal.
Applications
The capacitive analog sensor makes linear evaluation of a position for the first time; as soon as an object is located within the sensor's measuring range, a precise output current is produced. Applications include: material selection, non-conductive material thickness, sheet-thickness measurement, height measurement, diameter measurement, static and dynamic displacement, orbit-tracing, concentricity and eccentricity, axial and radial shaft run-out and alignment.
Powering safer mining with PDS
Sensors & Transducers
With the mining industry under increasing pressure to prioritise safety without compromising productivity, Booyco Electronics is pushing the boundaries of Proximity Detection System and Collision Avoidance System technology across both underground and surface operations.
Read more...The car of the future listens
Sensors & Transducers
The perception of external sounds in cars has been lacking, even in automated driving. That is why Fraunhofer IDMT-HSA is researching the integration of acoustic sensor technology in its KI4BoardNet project with the Hearing Car.
Read more...Telco Sensors for blocked or empty chute detection
Sensors & Transducers
In most industries there is a problem with photoelectric sensors as highly contaminated environments make it difficult to operate and sense reliably. Telco Sensors overcomes this through its powerful high-performance infrared sensors that ensure penetration of harsh pollution to guarantee reliable detection.
Read more...High-performance LineScan camera
Sensors & Transducers
Lynred, a global leader in infrared imaging technologies, has launched its next-generation SWIR LineScan camera and sensor, specifically designed for the inspection of silicon wafers, solar panels and waste management.
Read more...Online monitoring solution optimises asset performance across SKF South Africa
Sensors & Transducers
SKF’s sales, service and management teams has joined forces to deliver an advanced, integrated online monitoring solution for a key customer in Tunisia, operating nine mines, five plants and eleven production lines.
Read more...OMRON launches new non-contact
Sensors & Transducers
OMRON has unveiled its latest innovation in non-contact safety door switches, the D40A-2, which is designed to enhance workplace safety and streamline machinery operations.
Read more...Vibration monitoring in three axes ifm - South Africa
Sensors & Transducers
Machine vibrations are important indicators when it comes to assessing the current condition of a machine. ifm’s new and smart IO-Link vibration sensor helps to implement a simple and scalable condition monitoring approach using but a single device.
Read more...Smart solutions for weighing in hazardous milling zones
Sensors & Transducers
Minebea Intec supplies highly accurate weighing and inspection solutions that enable milling companies to organise their processes safely, efficiently and compliantly - even in hazardous areas.
Read more...Optimise sludge treatment and reduce operational costs
Sensors & Transducers
The Endress+Hauser inline measuring devices, the Proline Teqwave MW 300 and the Proline Teqwave MW 500, determine the total solids content of wastewater directly through microwave transmission. This is considerably less time consuming than the process of determining total solids content in a laboratory.
Read more...Family of analysers for smart and efficient chlorine measurement ABB South Africa
Sensors & Transducers
ABB has launched ChloroStar, a family of sensors, transmitters and accessories for accurate and reliable chlorine measurement and analysis that enable users in the water, wastewater and other industries to control chlorine more efficiently, enhancing treatment and increasing process uptime.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version