Sensors Pdf.docx

Parking light sensor:

The sensor can run standalone (without radio) or with radio allowing the sensor reporting the parking status to your controller. Useful for closing garage door when car has pulled in or keeping track of the teenager when you're not at home. In the sketch you can configure at what distance to start measuring, when parking status should be sent and when "panic" mode should be triggered (flashing red) Gas sensor:

Gas sensors play an important role in many applications, and have been extensively developed during the past few decades. This is especially the case for applications in monitoring automotive exhaust gases (lambda probe) and air quality (AQ sensors). Although the lambda probe itself cannot reduce polluting emissions from automobiles, it allows the adjustment of a stoichiometric mixture of air and fuel (Riegel et al., 2002). A modern concept with two lambda probes even allows detection of a defect in a three-way catalyst (Moos, 2005). AQ sensors can monitor the air quality in houses and cars (Denk et al., 1999), as well as detecting concentrations of unburnt hydrocarbons (Williams, 1999), an important point in fire prevention. Other applications include alerting people when harmful gases are in the ambient atmosphere. (Yamazoe, 2005). Gas sensors are meant to detect volatile compounds; when related to the human body these can be odour of urine, armpit sweat or exhaled breath. Seesaard et al. (2015) report on an embroidered sensor that functions as a wearable electronic nose, also referred to as ‘e-nose’. Functionalized single-wall carbon nanotube sensing materials were deposited onto interdigitated electrodes that were previously embroidered with electroconductive yarn on a fabric substrate (Fig. 2.9).

Tilt sensor:

A tilt sensor is an instrument that is used for measuring the tilt in multiple axes of a reference plane. Tilt sensors measure the tilting position with reference to gravity and are used in numerous applications. They enable the easy detection of orientation or inclination. Similar to mercury switches, they may also be known as tilt switches or rolling ball sensors. These instruments have become gradually more popular and are being adapted for increasing numbers of high end applications. For example, the sensor provides valuable information about both the vertical and horizontal inclination of an airplane, which helps the pilot to understand how to tackle obstacles during the flight. By knowing the current orientation of the plane, and the angle at which the plane is inclined to the earth's surface, stunt pilots, i.e. the Red Arrows, can put on a fascinating air show. Tilt sensors are an essential decision-making tool for the pilots. The functionality of tilt sensors is influenced by factors such as gravity, vibration, temperature, zero offset, linearity, cross-axis sensitivity, acceleration/deceleration, shock, clear line of sight between the user and the measured point, and calibration of tilt sensors A tilt sensor has a metallic ball that is designed to move the two pins of the instrument from the 'on' to the 'off' position, and vice versa, if the sensor reaches a pre-determined angle. Tilt sensors are the environment-friendly version of a mercury-switch.