Buy 4 elements of the security door to the attention

Note to buy security doors 4 points stability testing
1, San Diego, security doors security doors is critical to the stability of, this is the prime condition customers to buy the security door. Instability of the security door will cause alarm and missed alarm, staff at a loss, play no real role in security doors. Due to the security door sensor (that is, two door side panel) to open outward, it can emit electromagnetic waves into the external environment, while also receiving electromagnetic waves produced by the external environment. External electromagnetic devices have, such as power lines, large motor, electric welding machines, induction furnace, intercom ... ... Fusion outward radiation such as electromagnetic fields, these fields can interfere with normal detection, impact security doors; so that all security doors will more or less interference by the external environment. Technical force in solving the security door manufacturers can own stability at the same time, able to deal with the external interference, security door interference to a minimum.
security doors are usually designed with the real-time signal strength indicator, metal size and interfere with signal strength can be displayed. Real-time signal indicator in the initial installation and use plays a very important role in the process. In the initial installation and during use can be adjusted according to the signal light on the security door proper detection parameters, as far as possible to minimize interference from the external environment, thus improving detection accuracy of the security door. Some production companies in order to deceive this signal to cancel, or when no one was by turn, allows users to view the security door works perfectly well; but, at the security gate has been in a State of instability, regardless of whether you carry metal by police. Security door with a signal strength indicator in the working parameters of the installation time can be adjusted according to intensity, eliminate outside interference effects on security doors, ensure that security doors work correctly. Security door with environmental self-check function effectively to achieve immunity, anti-rejection.
selected in the same environment (including power, the external environment for electromagnetic interference the same) test: power up, blocking the infra-red radiation device to remove the infrared limit alarm functions. Sensitivity is set to alarm more sensitive (higher) level, security door alarm to wait and observe the number of lights shining, if the number of lots, and even alarm, you can try changing the operating frequency of the security door, adjacent frequency interference from the outside world until the lights shine at least. If you change the operating frequency, security door is still not stable and even alarm, shows that the security gate's own stability and anti-interference ability is poor. To compare the various types of security door one by one in the same detection (detection of the same metal) case, select.
2, security doors metal detection inspection of
Select the same metal samples to detect the security doors, false negatives, the smaller the better.
General security door should be able to detect all metal (except for the special design of the detector), can pass the GB15210-2003 for GB on "sensitivity" the strict inspection standard. We select the best detection of metal samples contained within the standard range.
metal detection ability is a sign of a metal detector manufacturers and technical strength, technology manufacturers can do the same for non-ferrous metal and ferrous metal detection and stability under the conditions of smaller metal detecting sensitivity control is very clear. And poor quality security doors, if slightly adjusted sensitivity high, never brought anything through the alarm, sensitivity is lowered, a large metal object through to police. This type of security is because of their poor internal circuit design, control does not cause linear, and cannot be used.
the other direction due to electromagnetic waves exist, so the metal detecting there direction, the cutting surface of electromagnetic waves up to signal strong, the cutting surface of electromagnetic waves at least signal is weak. Technology excellent production enterprises on the direction of the magnetic field for equalization, so security doors the same effect in all directions within the detection area detection metal difference; if the difference is large, you fail to report more, so users should choose direction detection of effect of a good product.
by the tests carried out used the same metal security doors of various location through and in various location in different directions through the metal, select the product less false. To exclude a small metal, need to detect large metal sensitivity adjustment to the appropriate location, test method as above.
3, and security door of shell
frames material is effect security door quality of important link one of, due to security electric magnetic field environment Xia was detection of metal produced of signal volume very small, so signal processing usually to zoom tens of thousands of times times to meet circuit drive requirements, Qian level of sensor that fear only small of displacement changes, by circuit zoom Hou, foot can caused alarm, so requirements security door shell in long time using process in the deformation more small more good.
security doors are designed to be independent of the door frame, door is equipped with a sensor of thin and long shape, only five or six centimetres (5cm-6cm), the length is up to 220 cm (220CM). Due to the installation environment and the long working relationship, door very easily, the sensor parameters and factory are too different, impact detection cannot work for a long time. At present, most manufacturers are using sawdust or high density wood fibre Panel security doors enclosures, as we all know, sawdust or high density wood fibreboard easily moisture absorption, moisture after months of time distortion, dispersion, disintegration; especially in the coastal areas because the air is humid and rainy season longer, purchase security products cannot be used within a short time after. Good security doors production enterprises attach great importance to product quality, such as shell is made of high-strength PVC door frame made of aluminium alloy, the material difficult to deformation, not damp, ensure the long-term use of products, its product vectors in use for ten years without maintenance.
other companies for product appearance, large metal decorative materials to decorate the shells. Because the security door is designed to detect metal objects, such as extensive use of metal materials, is a volatile factor. Sometimes due to drag people through the security gate when the wind shook the door, doorframe metal received had a displacement sensor and alarm. These enterprises is due to the metal cannot be a breakthrough technology, it features of appearance and fancy fuss, strategies vying for lower-market at a low price. With its own strong seismic capacity. When external force shaking, no mess like other security doors, then it will be clearly displayed on the LCD screen "shock protection" message. High levels of user at the time of purchase or in quality, performance, safety, and price is a secondary factor.
4, security doors on electromagnetic radiation safety validation
many household electrical appliances such as mobile phones, walkie-talkies, microwave oven, electric stove, TV, etc, to the radiation of electromagnetic waves around, through the metal detector gate there is a similar situation. Strength of an electromagnetic wave is electro-magnetic flux density measurement, when after the magnetic flux density exceeds a certain value, can cause personal injury.
in order to ensure the safety of inspectors and operators in China national standard GB15210-2003-through metal detectors in the General specification, through magnetic induction of type metal detecting gate was strictly limited. Related technical parameters can be found in GB 4.6.6 "magnetic limitation within the detection area" States that "150mm in the detection area to the left and right borders of the area, any point of the magnetic flux density should not exceed 30 u t". Provided for in no more than a standard value, in order to protect human health from damage. So any security doors production, must strictly implement the national standards, and by the State, "the Ministry of public security and police electronic products quality inspection center" inspection of its electromagnetic radiation safety instructions, issue a certificate, issued by the local public security department production permit. Therefore, the magnetic flux density must be lower than the warning value of national standards, to ensure the inspectors and operators personal health and safety.
security is a responsibility and combination of ideas and technology, this field is extensive, need professional manufacturer in China, professional, and social responsibility. China's security market and its products and the quality of personnel is not synchronized, users are non-professionals, know less about equipment, using skills. And security products have been widely used in the public and enterprises, large, centralized, conventional use in public, if the use does not conform to product safety and quality requirements, others of an inferior product for the public safety checks will bring very unstable factors to the public safety, this is the shame and fears of security industry.
therefore, speed up the development of industry standards, implementation must be strengthened, strengthen supervision of markets, strict conformity assessment and certification not only for traditional security certification, and certification of product-specific performance (such as a metal detector, magnetic radiation effects on personal health and safety, and waterproof, etc). Threshold for improved production and access to markets, standardize product against false advertising, to form an orderly market competition and reflect the professional manufacturers of social responsibility. BACK
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