Security detector purchase essentials

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Modern security technology and products directly serve the stability of society, guarantee social wealth and the safety of people's lives and property. It aims to prevent crime or effectively stop crime through high-tech means. The metal detector door is a representative product. It is not difficult to find that the use of metal detector doors has been involved in various industries of society and has shown a rapid development trend. However, as an engineer and user, what should you pay attention to during the purchase process?

What performance should you pay attention to when purchasing?

In the Chinese National Standard GB15210-94 "General Technical Conditions for Pass-Through Metal Detecting Doors", the definition of a through-metal detector door is: a door shape that can be passed through the structure, and an electromagnetic field is established in the door, when the human body carries the metal object through A device that generates an alarm when the door is in use. As with other alarm devices, the factors that affect the working effect of metal detectors are leak alarms and false alarms. The underreporting is because the sensitivity is not reached, and the alarm is not generated under the condition of the specified sensitivity registration and test samples; the false alarm is because the anti-interference ability is poor, and an alarm is generated when no metal objects pass through the detection door.

Over the years, in the examples of metal detectors used by engineers and users, we have continuously summarized: product technology design, process production, link control, quality inspection, etc., which are the elements of the market position of the manufacturers; and the engineering and users It is necessary to choose a truly applicable product at a reasonable price according to your own needs and multi-faceted comparison. Then, when purchasing metal detector doors, what are the essentials that engineers and users must pay attention to?

In general, high-efficiency metal detector doors should have the following characteristics:

1. High level of security function

Metal detector doors are required to have high security requirements, including the following factors:

· Uniform consistency of the magnetic field is the key to 100% detection rate;

· Security investigations must be sufficient to detect any hazardous metal objects, regardless of their entry location and angle of view;

· Security investigations must be sufficient to detect that personnel are being tested at any speed;

· Ability to detect both ferrous and non-ferrous metals.

2. High level of visibility

It is required to be able to distinguish small amounts of hazardous metal objects (such as small arms) from various metal materials carried by individuals.

The resolution is based on the following factors:

· Uniform consistency of magnetic field distribution;

· Various analytical capabilities of metal materials;

· immunity to external motor noise interference;

· immunity to external mechanical interference;

3. Excellent (noise interference) immunity

Noise interference is an important reason that affects the performance of metal detectors. The noise interference is divided into the following types:

·Instantaneous noise: the noise generated by the motor, the electronically controlled lock, and the co-load on the power line;

Intermittent noise: RF noise generated by the power supply device at voltage;

· Noise generated by other nearby metal detectors;

• Noise generated by moving or vibrating metal mass.

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