SENSOR TRANSDUCER DETECTOR

Pocket-Sized Sensor for Detect 'Date Rape' Drugs, A New Line of Defense Against Sexual Assault

2011-08-20T09:26:00.005+07:00

Date rape can be experienced by anyone, at any time. It's always better to be cautious than sorry. Not all sexual attackers are strangers who jump you in the streets. Sexual assaults can take place during social interactions such as dates while you are out with someone you know. In most cases of 'date rape', alcohol is the substance used to assist in forcing non-consensual sex

Nanotechnology

2011-05-02T16:07:00.003+07:00

Nanotechnology is science at the size of individual atoms and molecules: objects and devices measuring mere billionths of a meter, smaller than a red blood cell. Nanotechnology is rapidly becoming an interdisciplinary field. Biologists, chemists, physicists and engineers are all involved in the study of substances at the nanoscale. Nanoscale Experts sometimes disagree about what constitutes

Biosensors

2011-01-23T06:07:00.012+07:00

What Is a Biosensor?A biosensor consists of two components: a bioreceptor and a transducer. The bioreceptor is a biomolecule that recognizes the target analyte, and the transducer converts the recognition event into a measurable signal. The uniqueness of a biosensor is that the two components are integrated into one single sensor (Fig1). Fig 1. Biosensor Configuration. Biosensor = bioreceptor

Application of Ultrasound

2010-12-16T20:51:00.005+07:00

Ultrasound has many applications in our lifes. Below are some of the applications. Medical Ultrasound has a broad range of applications in medicine, where it is referred to as medical ultrasound. It is widely used in obstetrics to follow the development of the fetus during pregnancy, in cardiology where images can display the dynamics of blood ﬂow and the motion of tissue structures (referred

ULTRASONIC SENSOR

2010-11-26T10:02:00.011+07:00

Ultrasonic sensing techniques have become mature and are widely used in the various ﬁelds of engineering and basic science. Actually, many types of conventional ultrasonic instruments, devices and sophisticated software are commercialized and used for both industrial and medical applications. One of advantages of ultrasonic sensing is its outstanding capability to probe inside objectives

Piezoelectric Biosensor

2010-11-19T09:45:00.007+07:00

Biosensors are chemical sensors that take advantage of the high selectivity and sensitivity of a biologically active material. It is well known that the resonant frequency of an oscillating piezoelectric crystal can be affected by a change in mass at the crystal surface. Piezoelectric immunosensors are able to measure a small change in mass. A biosensor is an analytical tool

Sensor Signal Conditioning

2010-11-14T08:59:00.003+07:00

Typically a sensor cannot be directly connected to the instruments that record, monitor, or process its signal, because the signal may be incompatible or may be too weak and/or noisy. The signal must be conditioned—i.e., cleaned

Mercury Pressure Sensor

2010-11-08T08:19:00.005+07:00

Pressure measurement history was primarily based on the pioneering work of Evangelista Torricelli,who, for a short time,was a student of Galileo. During his experiments with mercury-filled dishes, in 1643, he realized that the atmosphere exerts pressure on Earth. Another great experimenter, Blaise Pascal, in 1647, conducted an experiment, with the help of his brother-in-law Perier, on the top of

STRAIN GAGE

2010-11-03T14:42:00.012+07:00

Force, Stress, and Strain If an object receives an external force from the top, it internally generates a repelling force to maintain the original shape. The repelling force is called internal force and the internal force divided by the cross-sectional area of the object (a column in this example) is called stress, which is expressed as a unit of Pa (Pascal) or N/m². Stress is the force an

Sensor Charactesristics

2010-11-03T14:38:00.001+07:00

Sensor Characteristic 1: Transfer Function, Span (Full-Scale Input), Full-Scale Output Sensor Characteristic 2: Accuracy, Calibration, Calibration Error, Hysteresis Sensor Characteristic 3: Nonlinearity,

ACCELEROMETERS

2010-10-29T11:39:00.009+07:00

Acceleration is a physical characteristic of a system. The measurement of acceleration is used as an input into some types of control systems. The control systems use the measured acceleration to correct for changing dynamic conditions. What is Acceleration? Acceleration: the time rate of change of velocityor : the time rate of change of the time rate of change of distance What

Fibers For Detect and Produce Sound

2010-10-22T09:39:00.002+07:00

In the August issue of Nature Materials, Yoel Fink, an associate professor of materials science and principal investigator at MIT's Research Lab of Electronics and his collaborators announce a new milestone on the path to functional fibers: fibers that can detect and produce sound. Applications could include clothes that are themselves sensitive microphones, for capturing speech or monitoring

Pressure Sensor

2010-06-05T23:42:00.008+07:00

Ashcroft Indust Digital 4-1/2" Pressure Gauge Pressure is force per unit area. Sensing it follows the same principle as the sensing of force that is measuring the displacement of an appropriate member of the sensor in response to pressure. The range of methods is quite large and includes thermal, optical as well as magnetic and electrical principles. Earliest sensors were purely mechanical.

TERC SENSOR | A Non-Acoustical Sensor to Improve Battlefield Communication

2010-03-28T12:43:00.016+07:00

If you're a soldier in a noisy tank or chopper, clear communication can mean the difference between life and death. That's why the military was looking for novel techniques to reduce the amount of background noise in high-noise environments like driving a tank or flying a helicopter. A Non-Acoustical device will help troops communicate on a noisy battlefield. The Tuned Electromagnetic

SENSOR CHARACTERISTICS (6)

2010-01-09T11:38:00.006+07:00

SENSOR EXAMPLE: 19. Application Characteristics Design, weight, and overall dimensions are geared to specific areas of applications. Price may be a secondary issue when the sensor’s reliability and accuracy are of

SENSOR CHARACTERISTICS (5)

2010-01-09T11:35:00.005+07:00

SENSOR EXAMPLE: 17 Environmental Factors Storage conditions are nonoperating environmental limits to which a sensor may be subjected during a specified period without permanently altering its performance under normal

SENSOR CHARACTERISTICS (4)

2010-01-09T11:29:00.006+07:00

SENSOR EXAMPLE 16. Dynamic Characteristics Under static conditions, a sensor is fully described by its transfer function, span, calibration, and so forth. However, when an input stimulus varies, a sensor response

SENSOR CHARACTERISTICS (3)

2010-01-09T11:25:00.007+07:00

Enter keywords here: @import url(http://www.google.com/cse/api/branding.css); Custom SearchSensor Examples: Enter keyword here: @import url(http://www.google.com/cse/api/branding.css); Custom Search Sensor Examples From the input to the output, a sensor may have several conversion steps before it produces an electrical signal. For instance, pressure inflicted on the fiber-optic sensor first results in strain in the

UNITS OF MEASUREMENT

2009-05-28T13:52:00.002+07:00

SENSOR EXAMPLE In this post, we use base units which have been established in The 14th General Conference on Weights and Measures (1971). The base measurement system is known as SI which stands for French “Le Systéme

Definition of Transducer, Sensor, and Actuator

2009-05-28T13:37:00.010+07:00

SENSOR EXAMPLE There are many devices which have close meaning, eg: transducer, sensor, detector, and actuator. What is difference of each device? A transducer is a device that converts a signal from one physical form to a