Q & A
Q: What is an anti-theft alarm system?
A: The anti-theft alarm system is a system that uses all kinds of functional explorers to protect the surroundings, space, environment and people of the house.
Q: What is an explorer?
A: The prospector uses sensors to sense signals such as currents and pulses caused by various physical and chemical changes to propel the radio-frequency circuit to emit alarm signals.
A Q: The role and operation method of the anti-theft host
B: The host is the center of the system. It is used to receive the alarm signal sent by the prospector to respond in a timely manner; after receiving the alarm signal, the host will sound a high-decibel siren, and together, it will dial out a number of groups set by the host through the telecommunications network emergency call.
AQ: What is the forced infrared anti-theft detector?
A: The forced infrared explorer relies on the infrared thermal energy announced by the body when the animal is forced to absorb thermal energy. It is also called a pyroelectric infrared probe. The explorer itself does not emit infrared radiation.
Q: Basic concepts of forced infrared exploration for infrared exploration
Answer A: In the scale of alert, why are people forced to infra-red prospectors be able to generate alarm signals when they are moving?
Q: In the natural world, any object above the absolute temperature (-273 degrees) will have an infrared spectrum. Objects with different temperatures will have different wavelengths of infrared energy, so the unevenness between infrared wavelength and temperature is related.
B: There are two key components in the forced infrared prospector. One is a pyroelectric infrared sensor (PIR), which can change infrared signals with a wavelength between 8 and 12um into electrical signals. It has a pressing effect on the white light signal in nature. Therefore, in the alert area of the forced infrared explorer, when there is no human movement, the pyroelectric infrared sensor only detects the scene temperature. When the human enters the alert area, it passes the Philippines. The Nell lens, pyroelectric infrared sensor senses the difference between the temperature of the human body and the temperature of the scenery. Therefore, the basic concept of infrared exploration of the infrared explorer is to sense the difference between the temperature of moving objects and scenery. Another device is a Fresnel lens. There are two methods for a Fresnel lens, namely a refractive type and a reflective type. The Fresnel lens has two functions: one is the focusing function, which refracts (reflects) the infrared signal of the thermal release on the PIR, and the second function is to divide the alert zone into several bright and dark zones to enter the alert zone Moving objects in the area can change the pyroelectric infrared signal on the PIR by changing the temperature, so that the PIR can generate the changed electrical signal
Q: What is the exploration scale?
Answer A: The exploration scale refers to the induction scale of the normal operation of the explorer, that is, the explorer can detect all objects within this scale and then report an alarm condition.
Q: What is the exploration interval?
A: The farthest interval that an explorer can explore under normal operations.
Q: What is the launch interval?
Answer A: The longest interval in the alarm system when wireless equipment sends out wireless alarm signals by electromagnetic waves after being triggered.
Q: What is induction sensitivity?
Answer A: Refers to the distance of the exploration interval and the speed of the response when the alarm is triggered. The induction sensitivity is high, and it can be detected at a distance far from the exploration device. .
Q: Attentions for the installation of forced infrared surveyor
A: Because the forced infrared surveyor is a kind of weak small signal detection equipment, it is necessary to pay attention to some details about the device, such as height and sensitivity. To properly install a forced infrared surveyor, it is necessary to grasp the following information: first, it is necessary to know the functional characteristics of the surveyor, it is not necessary to reasonably determine the orientation of the device, and finally it is necessary to carefully debug. It cannot be said that the detector can report that the device is good, so how to determine the orientation of a forced infrared explorer?
AQ: Determine the normal device viewpoint based on the clarification
B: The height of the device is not arbitrary, it will affect the sensitivity of the explorer and the effect of preventing pets. Imagine that an explorer is installed at a height of 2M and a height of 2.5, so when a moving object moves from the ground, the frequency of cutting open and dark areas is different.
AQ: Should not face glass doors and windows
Answer B: The forced infrared explorer is facing the glass doors and windows. There will be two questions: First, the white light is disturbed. Obviously, PIR has a strong function of suppressing white light, but it is not 100%. So avoid facing the glass doors and windows, can avoid the disturbance of strong light. The second is to avoid cluttering the environment outside doors and windows, such as crowd activities and vehicles.
AQ: It is not advisable to face the hot and cold air vents or hot and cold sources
Answer B: The sensing effect of the forced infrared explorer is closely related to the change in temperature. Both hot and cold vents and hot and cold sources can cause false alarms for the prospector. For some low-power explorers, sometimes air convection through doors and windows can also cause false alarms.
AQ: It is not advisable to face objects that are easy to swing
Answer B: The easy-to-swing objects will make the microwave prospector work, so they can also constitute false alarms. Gu pay attention to the way of illegal aggression
The intention of the device explorer is to avoid illegal aggression by criminals. Before deciding on the position of the device, it is necessary to consider the primary birth teeth of the building. In fact, we avoided entry and exit and cut off illegal lines of aggression, which achieved our intention.
AQ: How does the automatic infrared anti-theft anti-theft detector reduce the false alarm rate?
A: The infrared is automatically emitted by the transmitting end, and the infrared is received by the receiving end, forming an infrared network. This explorer can automatically defend against aggressors, avoid false alarms due to the crossing of small pets or the influence of the climate, and then minimize the false alarm rate to the maximum.
Q: What are wired and wireless?
Answer A: According to the alarm signal transmission method, it is divided into wired type and wireless type. That is, after detecting an illegal invader, the explorer transmits the alarm signal to the alarm host in two ways. The wireless explorer transmits the alarm signal by sending electromagnetic waves of a certain frequency. The wired explorer is divided into switch signal output and level. Signal output.
AQ: The difference between wired anti-theft and wireless anti-theft
A: The advantages and disadvantages of wired goods
Advantages: Because it is dedicated to dedicated lines, the transmission of alarm signals is relatively stable, and it is not easy to be disturbed by external factors.
Defects: Beautiful impact, large amount of construction work, messy operation, and inconvenient repairs, which requires special protection.
Advantages and disadvantages of wireless goods
Strengths: The entire area of the defense area will not be damaged, the device is simple, and the operation is simple.
Defect: The alarm signal will be disturbed by external elements, causing the transmission interval of the alarm signal to decay.
AQ: What is a door magnetic prospector? How does it work?
A: The door magnetic surveyor is used to sense the opening and closing of doors and windows. Generally there are wooden door magnets, window magnets, roller shutter magnets, iron door magnets. The principle is the principle of using magnets to control the opening and closing of the magnetron. When the two are close together, the magnetron is closed. At this moment, if the two are separated, the magnetron will open and the disconnection signal will trigger The radio frequency circuit announces the wireless alarm signal to the alarm host.
Q: What is a smoke explorer? How does it work?
Answer B: The smoke explorer is used in home, operation and commercial areas. The fire and smoke in the early stage of the scene were announced in time to prevent the accident. Generally divided into ionic smoke and photoelectric smoke. The principle of ionic smoke is that when there are smoke particles between the electrodes, the voltage between the electrodes will change.
AQ: What is a gas explorer? What is its operating principle?
Answer B: The primary device in the kitchen can effectively prevent gas leakage from jeopardizing the owner's life. When the front-end sensor detects the gas, the temperature will change and the process of the change will be converted into a control signal by the disposal circuit to trigger the alarm signal.
Copyright © 2002-2020
Shenzhen Lion King Technology Co., Ltd.-All rights reserved
Guangdong ICP No. 08114571
Service Hotline: 400-0506-110