With the rapid development of technology and the improvement of the material level of the peoples life, the mysterious and noble anti -theft alarm has now gradually entered the families of ordinary people.Anti -theft alarm player has played a very important role in guaranteeing our personal and property security.It is very worthwhile to configure a anti -theft alarm for the family. So when we buy, what should we pay attention to? What should we pay attention to when we use?Lets take a look!
What is the role of household alarm?
1. The purpose of preventing robbery: Once someone in the home encounters a robbery in the room, then we can use the alarm host to send the alarm signal and use external forces to deal with these problems.
2. The purpose of help: For this family alarm, you can pre -designated contact with your loved ones, so that you can notify and ask for help in time when an elderly person or a child at home or a child.
3. Remote surveillance purpose: Using the calling police phone to hear the indoor live movement in time, and you can also use remarks to accept picture materials. These are very favorable evidence.
4. Preventive gas poisoning: For some all -round family alarm systems, some gas leaked information such as gas or liquefied petroleum gas can be detected, and corresponding measures are taken in time.
5. Anti -theft purpose: This is a necessary role in installing this family alarm.When illegal personnel are carried out to theft, the corresponding anti -theft alarm will tell the owner through some telephones and even MMS, so that the owner can make choices or response measures based on the content of the alarm to avoid greater losses.
6. Fire purpose: Use a smoke detector to detect the concentration of smoke. Once you find the fire, you will use the fire alarm to tell the owner.
What are the types of household alarms
1. Active infrared detector: consisting of infrared transmitters and infrared receivers.Infrared transmitters emit a bouquet or most of the modulated infrared light into the infrared receiver.When there is no obstruction between the transmitter and the receiver, the detector will not call the police.When there is an object cover, the receivers output signal changes and the detector alarm.
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2. Passive infrared detector: There are 2 key elements in the middle, one is Fresnel lens, and the other is thermal release sensor.Any objects that are higher than absolute temperature (-273o) in nature will generate infrared radiation, and the infrared energy wavelength released by objects with different temperatures is also different.The human body has a constant body temperature, which is different from the surrounding environment temperature.When the human body moves, the change of this difference is detected by the heat -release sensor by the Fresnel lens, thereby output alarm signal.
3. Microwave detector: The principle of Doppler effect is applied.In the microwave section, when a frequency is sent, the launch of the emitted microwave encountered a fixed object, the microwave frequency of the reflected back is unchanged, that is, the fits = f collection, and the detector will not send a alarm signal.When the emitted microwave encountered a mobile object, the frequency of the reflected microwave frequency changes, that is, the F is released. At this time, the microwave detector will send a alarm signal.
4. Vibration detector: The vibration detector is based on the vibration signal generated by detecting the invaders for various destruction activities as the alarm basis.At that time, they will cause the vibration of these objects.The detector that triggers the alarm with these vibration signals is called a vibration detector.
5. Dual infrared detector and four -yuan infrared detector: The detector with two detectors with the same performance and opposite thermal -release sensor with the same performance and opposite polarity is a dual -yuan detector.The 4 -dollar detector with the same performance and opposite thermal release sensor with the same performance and opposite polarity is a four -yuan detector.
6. Double test detector: In order to overcome the defects of a single technical detector, usually two different technical principles detectors are integrated together. Only when the sensors of 2 detection technology detect the human body movement, the detector is calledFor the dual -test detector.The common dual -test detector on the market is microwave+passive infrared.
7. Sanjian detector and Si Jian detector: Sanjian detector is just a gimmick promoted by some domestic manufacturers and sellers, using microprocessor technology as a detection method.In fact, this can only be regarded as a three -technical detector.If this is all the three programs, is the infrared microwave microwave treatment anti -pets and anti -covered anti -camouflage be called the six -year detector?The real three -programs must have three detection techniques, such as: passive infrared+microwave+ultrasonic detector.
How to buy anti -theft alarm
Family intelligent anti -theft alarm can be divided into two categories: wired and wireless. The wired has a stable communication, strong resistance to external harassment, and small investment.Its shortcomings are mainly poor flexibility and cannot meet the changing needs of users. It is a very troublesome thing for those that have been installed.
Wireless can avoid the above similar situations. It has flexible and simple characteristics. Its disadvantages are mainly the shortcomings that are vulnerable to external interference and relatively high investment.
We can choose a wired or wireless home alarm as needed.
Family intelligent anti -theft alarm can also be purchased from the two functions of on -site alarm and self -phone alarm.
On -site alarm means that when the theft occurs, the probe transmits the detected signal to the host. After the host, the audio alarm sounds has a certain deterrent effect on the theft.Automatic telephone alarm not only has the function of on -site alarm, but also automatically dials the number we have set up, and can also tell a detailed explanation of the possession of the police.Utilizing this function, we can constitute the alarm LAN Center with the community security and alarm center. When we choose, we have considered the on -site processing part according to many factors such as our family area, family building, specific conditions and family members, and family members.
With the continuous development of semiconductor electronic components, at this stage, peoples family intelligent anti -theft alarms have greatly improved in terms of process and product quality, and at the same time, the price has also decreased significantly. The price is about 1,000 yuan.This brings great convenience to the usage of home -use anti -theft alarm.

Related tags： Houseware