Sensor generators. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

Sensors. Sensor generators. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

Generator sensors - these are devices that directly convert the input value X into an electrical signal.

Such sensors convert the energy of the source of the input (measured) quantity immediately into an electrical signal, i.e. they are, as it were, generators of electricity (hence the name of such sensors - they generate an electrical signal).

Additional sources of electricity for the operation of such sensors are fundamentally not required. However, additional power may be needed to amplify the sensor output, convert it to other types of signals, and for other purposes. Generators are thermoelectric, piezoelectric, induction, photoelectric and many other types of sensors.

Induction sensors the measured non-electric quantity is converted into the EMF of induction. Operating principle sensors is based on the law of electromagnetic induction. These sensors include tachogenerators of direct and alternating current, which are small electric machine generators, in which the output voltage is proportional to the angular speed of rotation of the generator shaft. Tachogenerators are used as angular velocity sensors.

Tachogenerator is an electric machine operating in generator mode. In this case, the generated EMF is proportional to the rotation speed and the magnitude of the magnetic flux. In addition, with a change in the speed of rotation, the frequency of the EMF also changes. They are used as speed sensors (speed).

Author: Koryakin-Chernyak S.L.

See other articles Section Electrician's Handbook.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Traffic noise delays the growth of chicks 06.05.2024

The sounds that surround us in modern cities are becoming increasingly piercing. However, few people think about how this noise affects the animal world, especially such delicate creatures as chicks that have not yet hatched from their eggs. Recent research is shedding light on this issue, indicating serious consequences for their development and survival. Scientists have found that exposure of zebra diamondback chicks to traffic noise can cause serious disruption to their development. Experiments have shown that noise pollution can significantly delay their hatching, and those chicks that do emerge face a number of health-promoting problems. The researchers also found that the negative effects of noise pollution extend into the adult birds. Reduced chances of reproduction and decreased fertility indicate the long-term effects that traffic noise has on wildlife. The study results highlight the need ... >>

Wireless speaker Samsung Music Frame HW-LS60D 06.05.2024

In the world of modern audio technology, manufacturers strive not only for impeccable sound quality, but also for combining functionality with aesthetics. One of the latest innovative steps in this direction is the new Samsung Music Frame HW-LS60D wireless speaker system, presented at the 2024 World of Samsung event. The Samsung HW-LS60D is more than just a speaker system, it's the art of frame-style sound. The combination of a 6-speaker system with Dolby Atmos support and a stylish photo frame design makes this product the perfect addition to any interior. The new Samsung Music Frame features advanced technologies including Adaptive Audio that delivers clear dialogue at any volume level, and automatic room optimization for rich audio reproduction. With support for Spotify, Tidal Hi-Fi and Bluetooth 5.2 connections, as well as smart assistant integration, this speaker is ready to satisfy your ... >>

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Random news from the Archive

Cota - technology for charging gadgets over the air 08.04.2015

The developers of Cota wireless charging technology, who spent 8 years on their brainchild, are ready to launch the development into mass production. Cota uses radio waves to transmit power and can charge all the devices in the house at the same time.

Startup Ossia has completed the development of Cota wireless charging technology and is ready to provide it to manufacturers of mobile devices and consumer electronics. The company expects that they will conclude the first contracts for the supply of Cota before the end of 2015, according to InfoWorld.

The development of the technology took 8 years, it was first introduced in 2013. Cota allows you to transfer energy to various electronic devices over the air using radio waves in the same frequency ranges that are used by Wi-Fi and Bluetooth standards.

For the Cota charger to work, it does not matter whether the device being charged lies or is in the pocket of the user, who is constantly moving around the room. The main thing is that this device is within a radius of 10 m from the energy transmitter.

The power transmitter is one of two components of Cota technology. The second component is the chipset, which must be placed in each device that needs to be transferred power. It can be a smartphone, tablet, laptop, smart watch, smoke detector, smart thermostat, etc. The company claims that the size of the chipset will allow it to be built into almost any modern device.

If the device is equipped with a Wi-Fi or Bluetooth antenna, then energy will be received using it. That is, for example, in the case of a smartphone, tablet and laptop, no additional components, in addition to the Cota chipset, will need to be built in. In the case of a thermostat, smoke detector, and other consumer electronics, an antenna will be required if one is not provided by the design.

The principle of operation of Cota is based on focusing the radio signal on the device being charged. This allows it to transmit a signal with a power of 1 W - a third of the power that a USB port provides to a mobile phone. And since the technology is based on a radio wave, devices do not have to be in direct line of sight from the transmitter, as, for example, in one of the Microsoft concepts.

"You don't have to put an energy transmitter in every room. Put it in one place and it will transmit energy to all devices in the house. It's like with Wi-Fi. If your device catches Wi-Fi, then it will receive energy," - Startup founder Hatem Zeine said.

The Ossia startup holds four key patents for Cota's technology in the US, Zane said.

Ossia engineers claim that the new technology is safe for humans - the power of the signal emitted by the energy transmitter is 10 times less than that of a Wi-Fi router.

Other interesting news:

▪ Part of the brain responsible for nicotine addiction

▪ Texas Instruments Wireless Ultrasonic Gas Leak Detector

▪ Compact underwater radio transmitters

▪ Gravitational waves could help predict tsunamis

▪ Expansion of the family of 32-bit microcontrollers

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Tools and mechanisms for agriculture. Article selection

▪ article Belshazzar's feast. Popular expression

▪ article What is sashimi? Detailed answer

▪ article Sliding window. home workshop

▪ article Seven-channel electronic key. Encyclopedia of radio electronics and electrical engineering

▪ article Electronic switching with diodes. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews