Force Sensor – Fresh Light On A Relevant Point..

There are a number of different types of sensors which can be used as essential components in different designs for machine olfaction systems. Electronic Nose (or eNose) sensors fall into five categories, conductivity sensors, piezoelectric sensors, Metal Oxide Field Effect Transistors (MOSFETs), optical sensors, and these employing spectrometry-based sensing methods.

Conductivity sensors might be made up of metal oxide and polymer elements, both of which exhibit a modification of resistance when exposed to Volatile Organic Compounds (VOCs). In this report only Metal Oxide Semi-conductor (MOS), Load Cell and Quartz Crystal Microbalance (QCM) will be examined, since they are well researched, documented and established as essential element for various machine olfaction devices. The application form, where proposed device will be trained to analyse, will greatly influence deciding on a sensor.

A torque sensor, torque transducer or torque meter is a device for measuring and recording the torque on a rotating system, such as an engine, crankshaft, gearbox, transmission, rotor, a bicycle crank or cap torque tester. Static torque is comparatively easy to measure. Dynamic torque, on the contrary, can be difficult to measure, as it generally requires transfer of some effect (electric, hydraulic or magnetic) from the shaft being measured to your static system.

A good way to make this happen is to condition the shaft or a member attached to the shaft with a number of permanent magnetic domains. The magnetic characteristics of those domains can vary based on the applied torque, and thus could be measured using non-contact sensors. Such magnetoelastic torque sensors are typically utilized for in-vehicle applications on racecars, automobiles, aircraft, and hovercraft.

Commonly, torque sensors or torque transducers use strain gauges placed on a rotating shaft or axle. Using this method, a method to power the strain gauge bridge is essential, in addition to a way to receive the signal from the rotating shaft. This is often accomplished using slip rings, wireless telemetry, or rotary transformers. Newer kinds of torque transducers add conditioning electronics as well as an A/D converter towards the rotating shaft. Stator electronics then look at the digital signals and convert those signals to Miniature Load Cell, such as /-10VDC.

A much more recent development is the use of SAW devices attached to the shaft and remotely interrogated. The force on these tiny devices since the shaft flexes can be read remotely and output without the need for attached electronics on the shaft. The probable first utilization in volume will be in the automotive field as, of May 2009, Schott announced it features a SAW sensor package viable for in vehicle uses.

An additional way to measure torque is by means of twist angle measurement or phase shift measurement, whereby the angle of twist caused by applied torque is measured by utilizing two angular position sensors and measuring the phase angle between them. This method is used inside the Allison T56 turboprop engine.

Finally, (as described within the abstract for all of us Patent 5257535), if the mechanical system involves the right angle gearbox, then the axial reaction force experienced by the inputting shaft/pinion may be related to the torque felt by the output shaft(s). The axial input stress must first be calibrated against the output torque. The input stress can easily be measured via strain gauge measurement of the input pinion bearing housing. The output torque is easily measured utilizing a static torque meter.

The torque sensor can function like a mechanical fuse and is also a vital component to have accurate measurements. However, improper installing of the torque sensor can damage the device permanently, costing time and money. Hence, cdtgnt torque sensor needs to be properly installed to make certain better performance and longevity.

The performance and longevity in the torque sensor as well as its reading accuracy will likely be impacted by the appearance of the Force Sensor. The shaft becomes unstable in the critical speed from the driveline to result in torsional vibration, which can harm the torque sensor. It is required to direct the strain to an exact point for accurate torque measurement. This point is typically the weakest reason for the sensor structure. Hence, the torque sensor is purposely made to be among the weaker components of the driveline.