(1) Anti-theft alarm
1. Intrusion Detector - A device that converts intruder information from a protected site into an electronic signal and transmits it outward. Commonly known as the probe, also known as the front end of the alarm device.
2. The signal transmission part, also known as the channel, is the channel through which the detector's electronic signals are transmitted externally. At present, there are three main transmission methods, namely, wired and wireless, and three different transmission methods for borrowing lines: Wired transmission, also known as dedicated transmission, uses special wires, cables, and optical cables to transmit alarm signals to other locations. Its advantages are its strong anti-interference ability and its ability to prevent damage. The line is short-circuited and the circuit can be instantly discovered. The disadvantage is construction trouble.
The wireless transmission connects the intruder detector with the wireless transmitter, and once the alarm occurs, it will send a radio signal to the air. The wireless receiver generates an alarm when it receives the signal and notifies the personnel to handle it. Its advantages are simple installation, strong maneuverability, multi-point transmission and a little reception, a long control distance and a large area. The disadvantage is that it may be interfered by more powerful radio waves, lightning and other stray electric fields.
The use of line transmission lines, power lines, cable television networks and other public lines can be borrowed for the transmission of alarm signals. The advantage is that construction is easy and no special wiring is required. The disadvantage is poor anti-vandalism.
3, anti-theft alarm controller - can be intrusion detector sent from the intrusion information electronic signal into sound and light alarm signal and display, and record, storage device. Commonly used desktop, cabinet, box and wall-mounted several. However, generating an alarm sound, displaying an alarm location, and storing recorded alarm information are essential basic functions.
(II) Intrusion detectors
Point Control This is a series of intrusion detectors with a small range of warning and limited to local control. Its features are: simple structure, stable operation, easy installation, and low price. The disadvantage is that the prevention is not strict enough.
Magnetic switch intrusion detector Magnetic switch intrusion detector: also known as magnetic switch. It consists of a permanent magnet and a reed switch. Reed pipes, also known as reeds, are constructed with two or more soft iron electrodes encapsulated in a sealed glass tube filled with an inert gas. In the natural state, the two electrodes do not contact normally open, contact is often closed. Among them, the normally open type is widely used. It is mounted on the frame of the door or window. The electrode is connected to the controller with a wire, and the magnet is mounted on the door or window sash. The door and window are closed and the magnet is moved to close it exactly when the magnet approaches. The soft iron electrode is magnetized and closed due to the opposite sex attraction. Open the controller and the door and window will enter the alert state (or arming). Then open the door and window again, because the magnet is far away from the reed switch, the electrode loses its magnetism and is automatically disconnected, and the controller emits a sound and light alarm. Thanks to easy installation, the majority of the residents can use their own hands to control the room doors, balcony doors and all windows. In addition to magnetic switches, such as micro-switches, limit switches, mercury switches, tension switches, etc. can be used simultaneously. Any contact switch that breaks the contact under external force and can automatically reset after the external force disappears can be used with the alarm controller. Using this principle we are customarily referred to as switch alarms. This type of alarm has a wide range of applications and is often used in various anti-theft systems of different sizes. However, its disadvantage is that it is rarely used alone due to the fact that the area and parts are not tight and the loopholes are relatively large.
The glass breakage intrusion detector utilizes the piezoelectric effect of the piezoelectric ceramic sheet (the piezoelectric ceramic sheet will generate a charge on the surface when it is distorted and deformed by an external force) and can be made into a glass breakage intrusion detector.
The detector is affixed to the door and window glass, and the upper and lower surfaces are connected to the control circuit by wires respectively. Once the glass is struck or broken by gravity, the piezoelectric effect is generated. After being processed by the control circuit, the alarm device will produce a sound and light alarm. This alarm should not be determined by the control circuit. The vibration caused by passing cars, people walking, wind blowing, etc. should be excluded. This reduces the number of false alarms. As small as several tens of square centimeters and as large as several square meters, different thicknesses and specifications of glass can be used. When installing, it should be noted that the paste is firm and reliable, and if it is used together with a switch-type alarm, the effect is better. It is the most simple and practical set of good anti-theft alarm system that integrates door lock control in residential buildings.
The video screen intrusion detector uses the video alarm controller to set the protection target within the camera's field of view and is remembered after being confirmed. An alarm signal can be generated when the protection target is moved or a new item is added. There is no limit to the number of items and the size of items, and they can be increased or decreased at any time. It is very convenient to use. The only downside is that you have to turn on your camcorder for arming and it will affect your lifespan.
Touch-inductive intrusion detectors Touch-sensitive detectors are often protected by conductive fabrics, conductive films or wires to protect safes, cabinets or other valuables and exhibits. Someone who wants to be in touch can cause an alarm. In the family, we can arm the balcony, guardrail, air-conditioner outdoor unit, etc. Once someone tries to climb, they can send an alarm.
Inductive detectors are mainly deployed with metal wires, and the warning range can be appropriately expanded. For example, artifacts can be erected around museums and showcases to prevent people from approaching and touching cultural artifacts. Those who encounter unruly rules and alarms will prompt staff to do so. stop. The advantage of this kind of product is that the arming maneuver is flexible and the range can be varied. The disadvantage is that due to the influence of the environment humidity and temperature, the sensitivity should be adjusted frequently.
Access control and access control systems commonly used point control products, all kinds of locks: button-type, touch-type electronic code locks; magnetic card locks; IC card locks; retina locks; fingerprint locks; voice-activated locks.
Combination locks for electronic and mechanical locks. Such a lock is placed on the door of the house, and the key can be used to open the door. The owner opens the alarm when he goes out and closes the door to lock it. Back home, the key to open the door, turn off the alarm can be. Even if someone steals the key to open the door in an alert state, but the password cannot be disarmed, an alarm will still be issued after a few seconds. If the door is locked and an attempt is made to break into the door, it will immediately call the police.
Building Intercom Security Door: Commonly used for unit building prevention. Install electronically-controlled anti-theft door and door closers and control keyboards at the building door. Any household in the unit can use the key to open the door and enter the building. The door closer automatically closes the door. The relatives and friends can visit the master through the control keyboard and press the corresponding signal. The owner's indoor intercom will make a sound. After confirming the identity through the intercom, press the door lock open button and the unit door will open. Please enter the guest. Unrelated personnel cannot be easily mixed in to ensure the security within the unit. When you go out, press the unlock key in the door to access freely. The video intercom only needs to install a miniature camera on the control keyboard outside the unit door. During the intercom, the host can see the visitor himself through the liquid crystal display screen to prevent the bad guys from posing. This type of anti-theft door was widely used in coastal open cities such as Guangzhou, Fujian, Hainan, and Shenzhen in the early 1990s. In recent years, northern cities have also been installed and used. The use of such doors should pay attention to whether any person who does not know when the door is opened intentionally follow-up, once the follow-up will pose a threat to the security of this unit.
Other common point-controlled alarm product pressure pads: Put the artifact exhibits on a pressure mat and issue an alarm once it is removed. Place a pressure pad under the carpet and an alarm will be generated if someone walks around. Put a pressure pad under the driving seat of the car, and someone can steal the car and report it. A wide range of applications.
Anti-theft camera: In conjunction with other intruder detectors, once there is activity in the prevention zone, the camera takes pictures continuously while the alarm is in progress. The number of pictures can be set before flushing and the case can be solved.
Motor vehicle anti-theft alarm: smashing glass, opening the door, stealing tires, and starting a car can trigger an alarm. Can be called in the car, you can report to the pager, you can also report to the alarm center. After receiving the alarm, the alarm center can immediately dispatch criminals; if it has already left, it can track the robbery through an electronic map.
(Iii) intrusion detectors cordon controlled using <br> <br> intrusion detector arm, forming an invisible warning level, an alarm can occur when someone passes through. Common are: active infrared, passive infrared, laser, microwave, inductive and so on.
Active infrared intrusion detector consists of active infrared light transmitter and receiver. Infrared light is in the spectral range invisible to the human eye. After being focused by a beam of light, an infrared beam is formed between the transceivers. Some people pass this invisible blockade line and must completely or partially block the infrared beam. The receiving end will automatically recognize whether the alarm is due to a change in the infrared beam. Such as small animals, leaves, dust, rain, snow, fog, it should not be blocked, people or a considerable volume of goods will be blocked. In the factory warehouses are used to block doors and windows, used in shopping malls to block passages, use parking lots to block exits, and use homes to block balconies for a wide range of uses. Since the beam is narrow, the installation of the transmitter and receiver must be solid and reliable, and should not be affected by ground vibration, and displacements can cause false alarms. The optical system should be kept clean and attention should be paid to maintenance.
The laser intrusion detector is constructed with active infrared, the main difference being the light source. The infrared laser beam is narrow and not easily divergent, and can form a blockade line of 1000 meters. The use of suitable mirrors in the exhibition hall can be used to form a four-circuit loop blockade with a set of devices, so as to prevent more rigorous. Although there are many advantages, due to the thin beam, the mirror is most likely to be displaced. Therefore, adjustments must be made frequently during use to ensure effectiveness. Due to the strong professionalism, it is not suitable for home use.
The reflective passive infrared intrusion detector has a pyroelectric device placed in the middle of the front of a cylinder, and a mirror is attached to the bottom of the cylinder. Passive infrared radiation occurs at room temperature for any item. The object with higher temperature has stronger infrared radiation. People are warm-blooded animals and infrared radiation is also the most stable. We are called passive infrared, that is, the detector itself does not emit any energy, but only passively receives infrared from the environment. The detector has been adapted to the environment for a few seconds after installation. Once the infrared radiation from the human body comes in, the heat is focused by the optical system to make it hot. The release device generates an abrupt electrical signal that alerts. The warning line formed by passive infrared intrusion detectors can generally reach tens of meters. Installation is easier than active infrared, but do not face heat sources and strong light sources, especially air conditioning and heating. Otherwise changing air flow will cause false alarms.
Transmitting and Receiving Split Microwave (Microwave Wall) Intrusion Detector Microwave is an electromagnetic wave that is invisible to the human eye. On the ground where the cordon is needed, the receiving and transmitting ends are separated and an invisible wall is formed in the middle. The wall can be up to one meter high and two meters high. When people walk through it, it will absorb or reflect microwaves, causing the receiving end to receive microwave power and undergo huge changes and cause an alarm. It is used to block channels, counters and shelves in shopping malls and weapons and ammunition depots. Blocking gates and transit rivers and lakes in the villa area, blocking the balconies and windows at the residences are all effective. In outdoor applications, however, it must be noted that the dog or animals larger than the dogs cross the blockade to avoid false alarms.
Inductive intrusion detectors use inductive intrusion detectors to block the perimeter of fish ponds and warehouses. They can form loop warning lines and are very effective and convenient to use.
1. Intrusion Detector - A device that converts intruder information from a protected site into an electronic signal and transmits it outward. Commonly known as the probe, also known as the front end of the alarm device.
2. The signal transmission part, also known as the channel, is the channel through which the detector's electronic signals are transmitted externally. At present, there are three main transmission methods, namely, wired and wireless, and three different transmission methods for borrowing lines: Wired transmission, also known as dedicated transmission, uses special wires, cables, and optical cables to transmit alarm signals to other locations. Its advantages are its strong anti-interference ability and its ability to prevent damage. The line is short-circuited and the circuit can be instantly discovered. The disadvantage is construction trouble.
The wireless transmission connects the intruder detector with the wireless transmitter, and once the alarm occurs, it will send a radio signal to the air. The wireless receiver generates an alarm when it receives the signal and notifies the personnel to handle it. Its advantages are simple installation, strong maneuverability, multi-point transmission and a little reception, a long control distance and a large area. The disadvantage is that it may be interfered by more powerful radio waves, lightning and other stray electric fields.
The use of line transmission lines, power lines, cable television networks and other public lines can be borrowed for the transmission of alarm signals. The advantage is that construction is easy and no special wiring is required. The disadvantage is poor anti-vandalism.
3, anti-theft alarm controller - can be intrusion detector sent from the intrusion information electronic signal into sound and light alarm signal and display, and record, storage device. Commonly used desktop, cabinet, box and wall-mounted several. However, generating an alarm sound, displaying an alarm location, and storing recorded alarm information are essential basic functions.
(II) Intrusion detectors
Point Control This is a series of intrusion detectors with a small range of warning and limited to local control. Its features are: simple structure, stable operation, easy installation, and low price. The disadvantage is that the prevention is not strict enough.
Magnetic switch intrusion detector Magnetic switch intrusion detector: also known as magnetic switch. It consists of a permanent magnet and a reed switch. Reed pipes, also known as reeds, are constructed with two or more soft iron electrodes encapsulated in a sealed glass tube filled with an inert gas. In the natural state, the two electrodes do not contact normally open, contact is often closed. Among them, the normally open type is widely used. It is mounted on the frame of the door or window. The electrode is connected to the controller with a wire, and the magnet is mounted on the door or window sash. The door and window are closed and the magnet is moved to close it exactly when the magnet approaches. The soft iron electrode is magnetized and closed due to the opposite sex attraction. Open the controller and the door and window will enter the alert state (or arming). Then open the door and window again, because the magnet is far away from the reed switch, the electrode loses its magnetism and is automatically disconnected, and the controller emits a sound and light alarm. Thanks to easy installation, the majority of the residents can use their own hands to control the room doors, balcony doors and all windows. In addition to magnetic switches, such as micro-switches, limit switches, mercury switches, tension switches, etc. can be used simultaneously. Any contact switch that breaks the contact under external force and can automatically reset after the external force disappears can be used with the alarm controller. Using this principle we are customarily referred to as switch alarms. This type of alarm has a wide range of applications and is often used in various anti-theft systems of different sizes. However, its disadvantage is that it is rarely used alone due to the fact that the area and parts are not tight and the loopholes are relatively large.
The glass breakage intrusion detector utilizes the piezoelectric effect of the piezoelectric ceramic sheet (the piezoelectric ceramic sheet will generate a charge on the surface when it is distorted and deformed by an external force) and can be made into a glass breakage intrusion detector.
The detector is affixed to the door and window glass, and the upper and lower surfaces are connected to the control circuit by wires respectively. Once the glass is struck or broken by gravity, the piezoelectric effect is generated. After being processed by the control circuit, the alarm device will produce a sound and light alarm. This alarm should not be determined by the control circuit. The vibration caused by passing cars, people walking, wind blowing, etc. should be excluded. This reduces the number of false alarms. As small as several tens of square centimeters and as large as several square meters, different thicknesses and specifications of glass can be used. When installing, it should be noted that the paste is firm and reliable, and if it is used together with a switch-type alarm, the effect is better. It is the most simple and practical set of good anti-theft alarm system that integrates door lock control in residential buildings.
The video screen intrusion detector uses the video alarm controller to set the protection target within the camera's field of view and is remembered after being confirmed. An alarm signal can be generated when the protection target is moved or a new item is added. There is no limit to the number of items and the size of items, and they can be increased or decreased at any time. It is very convenient to use. The only downside is that you have to turn on your camcorder for arming and it will affect your lifespan.
Touch-inductive intrusion detectors Touch-sensitive detectors are often protected by conductive fabrics, conductive films or wires to protect safes, cabinets or other valuables and exhibits. Someone who wants to be in touch can cause an alarm. In the family, we can arm the balcony, guardrail, air-conditioner outdoor unit, etc. Once someone tries to climb, they can send an alarm.
Inductive detectors are mainly deployed with metal wires, and the warning range can be appropriately expanded. For example, artifacts can be erected around museums and showcases to prevent people from approaching and touching cultural artifacts. Those who encounter unruly rules and alarms will prompt staff to do so. stop. The advantage of this kind of product is that the arming maneuver is flexible and the range can be varied. The disadvantage is that due to the influence of the environment humidity and temperature, the sensitivity should be adjusted frequently.
Access control and access control systems commonly used point control products, all kinds of locks: button-type, touch-type electronic code locks; magnetic card locks; IC card locks; retina locks; fingerprint locks; voice-activated locks.
Combination locks for electronic and mechanical locks. Such a lock is placed on the door of the house, and the key can be used to open the door. The owner opens the alarm when he goes out and closes the door to lock it. Back home, the key to open the door, turn off the alarm can be. Even if someone steals the key to open the door in an alert state, but the password cannot be disarmed, an alarm will still be issued after a few seconds. If the door is locked and an attempt is made to break into the door, it will immediately call the police.
Building Intercom Security Door: Commonly used for unit building prevention. Install electronically-controlled anti-theft door and door closers and control keyboards at the building door. Any household in the unit can use the key to open the door and enter the building. The door closer automatically closes the door. The relatives and friends can visit the master through the control keyboard and press the corresponding signal. The owner's indoor intercom will make a sound. After confirming the identity through the intercom, press the door lock open button and the unit door will open. Please enter the guest. Unrelated personnel cannot be easily mixed in to ensure the security within the unit. When you go out, press the unlock key in the door to access freely. The video intercom only needs to install a miniature camera on the control keyboard outside the unit door. During the intercom, the host can see the visitor himself through the liquid crystal display screen to prevent the bad guys from posing. This type of anti-theft door was widely used in coastal open cities such as Guangzhou, Fujian, Hainan, and Shenzhen in the early 1990s. In recent years, northern cities have also been installed and used. The use of such doors should pay attention to whether any person who does not know when the door is opened intentionally follow-up, once the follow-up will pose a threat to the security of this unit.
Other common point-controlled alarm product pressure pads: Put the artifact exhibits on a pressure mat and issue an alarm once it is removed. Place a pressure pad under the carpet and an alarm will be generated if someone walks around. Put a pressure pad under the driving seat of the car, and someone can steal the car and report it. A wide range of applications.
Anti-theft camera: In conjunction with other intruder detectors, once there is activity in the prevention zone, the camera takes pictures continuously while the alarm is in progress. The number of pictures can be set before flushing and the case can be solved.
Motor vehicle anti-theft alarm: smashing glass, opening the door, stealing tires, and starting a car can trigger an alarm. Can be called in the car, you can report to the pager, you can also report to the alarm center. After receiving the alarm, the alarm center can immediately dispatch criminals; if it has already left, it can track the robbery through an electronic map.
(Iii) intrusion detectors cordon controlled using <br> <br> intrusion detector arm, forming an invisible warning level, an alarm can occur when someone passes through. Common are: active infrared, passive infrared, laser, microwave, inductive and so on.
Active infrared intrusion detector consists of active infrared light transmitter and receiver. Infrared light is in the spectral range invisible to the human eye. After being focused by a beam of light, an infrared beam is formed between the transceivers. Some people pass this invisible blockade line and must completely or partially block the infrared beam. The receiving end will automatically recognize whether the alarm is due to a change in the infrared beam. Such as small animals, leaves, dust, rain, snow, fog, it should not be blocked, people or a considerable volume of goods will be blocked. In the factory warehouses are used to block doors and windows, used in shopping malls to block passages, use parking lots to block exits, and use homes to block balconies for a wide range of uses. Since the beam is narrow, the installation of the transmitter and receiver must be solid and reliable, and should not be affected by ground vibration, and displacements can cause false alarms. The optical system should be kept clean and attention should be paid to maintenance.
The laser intrusion detector is constructed with active infrared, the main difference being the light source. The infrared laser beam is narrow and not easily divergent, and can form a blockade line of 1000 meters. The use of suitable mirrors in the exhibition hall can be used to form a four-circuit loop blockade with a set of devices, so as to prevent more rigorous. Although there are many advantages, due to the thin beam, the mirror is most likely to be displaced. Therefore, adjustments must be made frequently during use to ensure effectiveness. Due to the strong professionalism, it is not suitable for home use.
The reflective passive infrared intrusion detector has a pyroelectric device placed in the middle of the front of a cylinder, and a mirror is attached to the bottom of the cylinder. Passive infrared radiation occurs at room temperature for any item. The object with higher temperature has stronger infrared radiation. People are warm-blooded animals and infrared radiation is also the most stable. We are called passive infrared, that is, the detector itself does not emit any energy, but only passively receives infrared from the environment. The detector has been adapted to the environment for a few seconds after installation. Once the infrared radiation from the human body comes in, the heat is focused by the optical system to make it hot. The release device generates an abrupt electrical signal that alerts. The warning line formed by passive infrared intrusion detectors can generally reach tens of meters. Installation is easier than active infrared, but do not face heat sources and strong light sources, especially air conditioning and heating. Otherwise changing air flow will cause false alarms.
Transmitting and Receiving Split Microwave (Microwave Wall) Intrusion Detector Microwave is an electromagnetic wave that is invisible to the human eye. On the ground where the cordon is needed, the receiving and transmitting ends are separated and an invisible wall is formed in the middle. The wall can be up to one meter high and two meters high. When people walk through it, it will absorb or reflect microwaves, causing the receiving end to receive microwave power and undergo huge changes and cause an alarm. It is used to block channels, counters and shelves in shopping malls and weapons and ammunition depots. Blocking gates and transit rivers and lakes in the villa area, blocking the balconies and windows at the residences are all effective. In outdoor applications, however, it must be noted that the dog or animals larger than the dogs cross the blockade to avoid false alarms.
Inductive intrusion detectors use inductive intrusion detectors to block the perimeter of fish ponds and warehouses. They can form loop warning lines and are very effective and convenient to use.
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