Sensor Net

OVERVIEW - Regular monitoring of asthma is essentially needed for its effective management by the patient. This self-monitoring can be carried out by assessing the severity and frequency of the symptoms (like shortness of breath and wheezing) and by the measurement of the function of the lung by the use of the Peak Flow Meter. Your Peak Expiratory Flow Rate (PEFR) is measured by the peak flow meter which correlates to the extent to which your lungs are open. A decrease in Peak Expiratory Flow Rate shows a worsening of the asthma and the narrowing of the air passages. Your physician can determine the best management technique for your asthma by monitoring the PEFR. RECOMMENDATIONS - It is[..]

Some asthma symptoms are present in other conditions, such as coronary heart disease, bronchitis or emphysema. So breathing tests are used to pinpoint asthma and eliminate other diseases from the diagnosis. The two main devices for testing lung function are the peak flow meter and the spirometer. If you have asthma your airways become narrowed so the air will not flow freely. It is impossible to measure the diameter of the air passages, but this can be estimated by finding out the speed at which air is expelled from the lungs. The peak flow meter, or peak expiratory flow meter, is a small instrument that measures the maximum rate at which you breathe out. You take a huge breath,[..]

Although the term 'area velocity flow meter' may sound rather complicated to some, the basics of how it works are actually not all that complicated. Basically, to begin with, an area velocity flow meter works by continuously measures both the level and velocity of something in order to be able to calculate flow volume in an open channel or pipe, for instance. There are several different factors that need to be understood in regards to how an area velocity flow meter works, for instance there is the matter of the ultrasonic sensor, which is installed at the very bottom of a pipe or channel, and in order to be able to measure the water level, this ultrasonic sensor works by transmitting[..]

> While a sensor database is something that may be available in the future, there are a number of software solutions that allow today’s businesses to create an effective database that suits their needs.  As new research unfolds, the software procedures and project management solutions are being streamlined.  Even a small business can take advantage of systems that were at one time reserved for major industrial applications. The idea of using sensors in a database is attractive.  Several groups are working on ways to implement the sensor network approach in such a way that data can be retrieved with more flexibility. The existing networks are being[..]

Did you ever experience a shove when the car you were travelling in suddenly took a turn? Or have you ever wondered why water does not spill out of a bucket that is being swung around? The reason for both these occurrences is the same. Here's a very simple activity that I include in the homeschool curriculum that I teach. The Swirling Can Experiment: Tie a string to an empty soup can in such a way that you can hold some water in the soup can while suspending the can from the string. Fill the can partly with water and, holding the string, swirl it around in a horizontal loop by placing your hand above your head. Now swirl it around in front of you making a vertical loop. Does the water[..]

Every day millions of web pages have been added in the dynamic world of Internet. And, a common user has all the options. From getting the simple information to extracting the research material – the modern Internet user relies heavily upon this medium. With the passage of time, this dependability has further bolstered by the advent of new tools and technologies. You just get a few seconds to get hold over the potential visitor to your website. Within these seconds, you need to grab the attention of these visitors. For that, you need to use the latest tools and technologies, which can make the browsing faster and convenient. This is the most obvious reason behind the surge of J2ME[..]

Have you ever wondered how an iPod knows when you flip it or how it can respond to a game you are playing on the screen? This piece of technology is called the accelerometer and it is a vital piece of the iPod puzzle. The accelerometer inside the iPod touch uses three elements; An electrical current, silicon mass, silicon springs. When these elements are tied together, they give the user an incredible gaming experience. The silicon springs measure the position of the silicon mass and cause a fluctuation in the electrical current. The springs do this by gauging where the electrical current is moving through the silicon mass. When the silicon moves, the current changes and the LCD screen[..]

The iPhone can be considered as the big daddy of all the smart phones when it comes to features. It offers brilliant features that make it standalone in the mobile phone market. One such feature is Accelerometer. In simple terms, Accelerometer is a product of outsource iphone application development that measures the acceleration it experiences relative to freefall. For iPhone, it changes the display accordingly when the phone is rotated from portrait to landscape and vice-versa. Apple offers a Software development Kit (SDK) to create new applications for iPhone. Users can outsource iPhone application development to a professional firm. These firms develop the applications according to[..]

One must have observed certain devices such as iTouch, which responds with a flip-like function when the user moves his/her fingers across. If the functionality ensures a ‘cool' experience for the user, the technology behind is the accelerometer. The accelerometer in general tracks the movement or the tilt of the device with respect to a reference axis. The iTouch accelerometer uses the variations in electrical current along with silicon mass and spring to track its own movement. The silicon springs gauges the movement of the current through the silicon mass. By doing so, it measures the position of the silicon mass and causes a corresponding fluctuation in the electrical current. To[..]

Parking sensors are becoming popular on an extremely rapid pace. The reason behind this popularity is the outstanding benefits that are associated with these parking sensors. Without having these parking sensors, it is extremely easy to damage your car by not seeing what is going behind your car. To avoid any types of problems at the time of reversing or parking your car, you must never overlook the need and importance of installing such in your car. IF you still don't know why you must opt for these sensors, you must consider following few benefits of this technological masterpiece.o In today's world, it is not hard to face such situations where you have to park your car in congested[..]

Sometimes car accidents happen in the parking lots, and mostly all of them are caused by reverse parking. With parking sensors or reversing sensors, you could avoid the danger associated with parking, particularly reverse parking. These parking sensors could be fitted into any vehicle, such as cars, trucks, minivans, caravans, and others. With the help of reversing sensors, you would be able to make your way into the parking space smoothly. There are several reasons for fitting your car with reverse parking sensors or a parking sensor at the front of the car. The reversing sensors are designed to give out an early warning whenever there is a danger in parking your car. So, try to be[..]

The image sensor is the camera component which captures light and begins the process of turning it into a digital image. There are two types of security camera sensors: CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor). Which of the two you choose depends on your application. First a little background on each technology. Wtih a CCD sensor, every individual pixel's charge is transferred through an output node, which is then converted into an electrical signal. The signal is then buffered and sent as an analog signal. Because of the pixels can be devoted to light capture, and the image quality is usually pretty high. With a CMOS sensor, every individual pixel[..]

So, you are thinking to install a DVD player in your car. Well, it is a great decision but you must keep in mind that installing car DVD players is not something for the driver but for people sitting in the car. What it means is that you just can not watch anything while driving as it is extremely dangerous. Due to this particular reason it wouldn’t be wrong to suggest that car DVD players are not for you. Now, if you want something only for you, then you must consider installing parking sensors. The parking sensors are extremely useful and they are only for drivers. If reverse parking has always been an issue for you, then you must opt for these sensors as they will resolve this issue[..]

Car accidents can be extremely devastating. In fact, several people have to lose their live just because of inability to stay vigilant while driving their own vehicle. By delving into the details pertaining to car accidents, it becomes simple to know that it is one of the biggest killer right from 1869, when an Irish women was killed. Situations in recent years were not too different as in 2005 as many as 6,420,000 auto accidents took place only in America. How to handle this problem: Although lots of steps have been taken in order to stop these car accidents but things are still not too good to brag about. But, it is a fact that some steps can be taken to stop the chances of having an[..]

ng sensors are an important addition to vehicles. They help avoid most accidents by detecting nearby objects and have several variations and designs to them. Although called by different names, they work the same way and are usually found on the bumper or brackets of a vehicle. Most people wonder if getting parking sensors are worth it. The truth is having a sensor on your vehicle is one of the smartest things a person can do. Accidents are a traumatic experience for anyone involved, and this is where the importance of parking sensors comes in. The sensors detect objects that may be too close to your vehicle, and trigger an alarm. The alarm grows stronger depending on how close the[..]

All in one car reversing set with everything you will need for safety as you back up your car, including a touch button 7 Inch car rearview screen monitor, 4 radar sensors, a weatherproof rear view IR equipped night vision camera, and a handy senor box to connect everything together. Some excellent features include voice warnings of distance from the included speaker, detection of up to 2 meters which will be displayed on the rear view monitor LCD in incremental centimeters, and auto powering and viewing of both the sensor and the camera when the car goes in reverse. In stock now for single piece or bulk orders, order yours today! Manufacturer Specifications Set Includes 4 Sensors +[..]

An often overlooked area of home security is broken glass. Homeowners consider the potential for intruders to enter at the window but rarely contemplate the means. Glass break sensors are a great addition to any home security system whether your security system is a monitored system or a do-it-yourself system. Glass break sensors are attached to a corner of a window. Often they are attached with self-adhesive tape for easy installation. These sensors come in a variety of sizes to suit your personal tastes. When a window is broken a vibration is caused. This vibration is detected by the sensor. The sensor will then open its contact to trigger an alarm system. When installing glass break[..]

Quartz Crystal Microbalance The Quartz Crystal Microbalance (QCM/QMB) is an extremely sensitive mass sensor, capable of measuring mass changes in the nanogram range [1]. QCMs are piezoelectric devices fabricated from a thin plate of quartz with electrodes affixed to each side of the plate. A QCM-D (Quartz Crystal Microbalance with Dissipation monitoring) consists of a thin quartz disc sandwiched between a pair of electrodes. Due to the piezoelectric properties of quartz, it is possible to excite the crystal into oscillation by applying an AC voltage across the electrodes. Changes to this oscillation are directly proportional to mass changes on the crystal [1]. Various sorbent coatings[..]

-- End Ad Box ---> Preventive maintenance—this is the main reason being cited by the leading oxygen sensor manufacturers why they would advice BMW owners to replace the O2 sensors of their vehicles periodically. A damaged oxygen sensor can greatly increase the fuel consumption of a vehicle. Further, the failure of the BMW oxygen sensor may cause damages on other parts of the vehicle, especially on the catalytic converter which is necessary for emissions control. An automotive oxygen sensor is a small electronic sensor inserted into the exhaust system of most engine-fueled vehicles, especially on those manufactured after 1980. Vehicles manufactured in the 1980s are usually equipped[..]

If you really take the time to sit down and think about your home security measures, chances are you will realize that there are many access points. Those weak points put you, your family and your possessions at risk. An integrated security system is a system designed to slow any potential threat down enough to give you time to contact your security company or the police. Like any security system, they are not infallible, and can be beaten, but they will buy you time in the event of a break in! Here are the key elements of a good integrated home security system: Home Security Sensors - Perimeter Installing some kind of security on the perimeter of your property can mean valuable minutes[..]

There are lots of technological advances these days to make driving a safer activity. Parking sensors are one example of this type of advance. Accidents are happening all the time, when drivers hit or run over something that was outside of their line of vision and hence they did not see it. If you often have to maneuver or park in small spaces or parallel park then it could be well worth your while to have parking sensors installed. Another installation you should consider for the protection of your car, leather seats especially, is window tinting.   There are various types of parking sensors you can buy, so to select the type that is best for your car you need to consult a[..]

Oxygen sensors that are used in the automotive field are generally referred to as the o2 sensor. These sensors are used in the aid of fuel injected engines where fuel is mixed with air and also to assist with emission reduction to reduce the amount of pollution that an automobile can emit. AFR which is the abbreviated name for Air-Fuel-Ratio is the ratio representation of air and fuel during incineration in a vehicle. The oxygen sensors are used for the duration of this process to determine whether the ratio is considered rich or lean. The oxygen sensors however does not give the ratio on its own as the sensor cannot be placed directly in the exhaust stream, therefore they are unable to[..]

Home security sensors are delicate devices and represent more than a simple investment. They also provide safety and additional security to our home or business, which is why careful consideration is required for setting up these gadgets. Below are some of the factors to consider before installing home security sensors. Proximity Based on statistics, burglars often choose to enter or break in through areas of the house that are farthest from neighbors or in areas most concealed from view by people outside the house. This means that proximity to other people is a major factor in determining the point of entry, as well as the best positions for setting up the security sensors. Basically,[..]

You don't need to be an electrical engineer to understand why CCD image sensors are better than CMOS when it comes to digital cameras, camcorders, and security cameras. The image sensor is a special component that converts light into electronic impulses. For traditional cameras it would be the equivalent component of the film used. The film used in a camera is a major factor on how the photographs will turn out. These days imaging equipment, such as security cameras and digital cameras, rely on CCD or CMOS image sensors. Both chips are about the size of a dime. CCD stands for Charged coupled device and are widely used in digital cameras, and surveillance cameras. CMOS, complimentary[..]

 China Wholesale Wholesale Ciphone i9k Dual Card Quad Band Gravity Sensors Cell Phone The Fashion iPhone Style Cell Phone support Dual SIM Dual Standby, 2.8 Inch QVGA Touch Screen, 3D Gravity Sensors, can shake the phone wallpaper and songs, Moving QQ, Java, MSN, Drag icon, Ten Page Menus function and so on, the Ciphone i9k also support FM Radio, you can enjoy your favourite programes at anywhere. Then it supports GSM 850/900/1800/1900 MHz bands, can be used worldwide!  GSM networks in North and South America operate at frequencies of 850 or 1900 MHz, while most networks in other countries operate at frequencies of 900 or 1800 MHz. PapayaOne recommends quad band[..]

It is an unfortunate reality that every year thousands of people are injured by their garage doors.  Most of these injuries are due to the garage door falling on or crushing the person, and sadly, in a majority of cases, it is a child who is most likely to be hurt.  This is why it is so critically important to install a high quality garage door safety sensor on every garage door you own. A vital Safety Feature Why are garage door sensors considered such vital safety features?  Put simply, it's because they save lives and prevent serious injuries.  A garage door safety sensor does not replace proper safety habits, but it does help ensure your safety when the unexpected happens. Garage[..]

There are many tools used in the work place. It does not matter what industry you are in, the fact is that there are a lot of sensors for some purpose or another. Theses sensors are the front line detection that helps each of us to do our jobs better. However, there is one industry that uses a lot of sensors in all kinds of machines. That industry is the weather industry. Those who work in the weather industry use all kinds of sensors in all of their work. However, there is no sensor used more than that of the temperature sensor. The part of a weather meter that actually senses the weather is called a thermocouple. This is the part that looks like a wire leading from the reading box. It[..]

An Oxygen sensor is sometimes called a Lambda sensor or probe, it is used to lessen emissions from a vehicle by guaranteeing that the engine burns its fuel well and clean. Robert Bosch GmbH which is one of the world's biggest automobile components supplier was founded by Robert Bosch in 1886, and was responsible for the introduction of the first Lambda sensor/probe or oxygen sensor in the year 1976. Oxygen sensors that are used for automobiles are generally referred to as O2 Sensors and after the first one was pioneered by Robert Bosch, Volvo and Saab, which is a manufacturer of automobiles, but which General Motors is now the proprietor of, decided to be the first set of companies to[..]

For as long as engines have existed there has been a need to ensure that they run at the optimum temperature and that coolant is always and freely available. The two main types of coolant are either air or water based liquids both of which operate by being circulated around the engine to prevent it from overheating. For many years, the monitoring of coolant levels was never carried out or if it was, then at best a cursory dipstick was used. During those days, engines were much larger and comparatively inefficient so a slight loss of coolant did not present so much of a problem, but as engine design has evolved over the years and newer lighter materials came into use then the repair or[..]

Garage door sensors are neat things. They send an invisible beam to each other across the garage door opening. If an object of thing breaks the beam, they won't let the door shut. Cooler yet is that if the door is in the motion of closing and something breaks the beam, the door opener will stop and reverse and lift the door back up. This a very neat feature which keeps kids, pets, and other object safe from a heavy garage door. The truth is that these little sensors are very cheap and easy to replace. Most of the times these little devices get sheared off by a car tire, get damage by things in the garage, or just break. The easiest way to get new ones is to go to your local hardware[..]