Explosion-proof laser intrusion detector design concept and function features

In recent years, the need for security has become increasingly diversified, and a series of weaknesses such as passiveness, high false alarms, and limitations, which are commonly seen in perimeter protection, have been unable to meet people’s protection for perimeter security. Therefore, laser beam detectors, with their high adaptability and extremely low false alarm rate, are basically not affected by the environmental factors such as light and weather, which greatly compensate for the shortcomings of traditional perimeter alarm protection systems and better meet people’s needs. Perimeter protection application requirements.

With the ripening of the market, the perimeter security of some flammable and explosive industries such as petroleum, coal, chemicals, and pharmaceuticals also began to use laser intrusion detectors. However, since laser intrusion detectors are wired alarm detectors, there may be open flames when there are special circumstances that will cause unimaginable disasters to the protected area. Then there was a flameproof laser intruder on the market. Flameproof means that the energy of the explosion was isolated inside the cavity, rather than the dangerous gas outside the cavity. Its external shell is mostly made of cast iron, large and bulky, and costly. Before opening the cover of the shell, the power must be turned off. Otherwise, if sparks are generated, it will be exposed to the atmosphere, thus causing danger.

As a result, Feitian Laser Company developed and manufactured the intrinsically safe explosion-proof laser intrusion detector. Intrinsically safe explosion-proof laser shots are electrical devices with intrinsically safe circuits. The so-called intrinsic safety circuit is a circuit that generates the ignition gas atmosphere and the prescribed explosive atmosphere under any specified conditions (including the fault conditions specified in the normal operation). At the same time, it has a strong ability to resist electromagnetic radiation, resist stray light interference, and adapt to bad weather conditions such as rain, sand, wind, and fog, and has a high safety factor and cost performance. Therefore, intrinsically safe explosion-proof laser intrusion detectors are subject to customers' Unanimous praise.

The most prominent feature of the explosion-proof intrinsic safety laser produced by Flying Lasers is that the safety barrier circuit is a specially designed safety circuit that combines the voltage and current parameters of the transmitting and receiving circuits. It is built into the product and directly interfaces with the transmitting and receiving circuits. . After special treatment, the combination of the safety barrier and the circuit plays the role of voltage regulation and current limiting.

However, most of the intrinsically safe explosion-proof lasers currently in the industry are externally connected with standard Zener-type safety barriers that are commercially available. Because the circuit principle of the safety barrier needs to absorb the energy of the input circuit, it is easy to cause the output voltage to be unstable. Voltage instability has a great influence on the product circuit and signal processing, so it is not well matched with the product and the performance stability is poor.

Flying Laser Intrinsically Anti-Explosion Laser Detector has the following features:

One, four professional explosion protection

1. Dual current limiting, dual overvoltage protection type safety barrier circuit

Dual voltage regulator design of the safety circuit can not only limit the current but also prevent overvoltage, and the safety grid power supply fluctuation is extremely low.

2. High-power cement resistance + insurance protection circuit

There is no spark generated when the equipment is running, and it can be used in many dangerous situations.

3. Signal output security

Adopt solid state relay output, no mechanical contacts, no spark, low power consumption and fast response.

4. Transmitter multi-channel frequency output + receiver multi-channel frequency identification

Using PWM, PCA and other control technologies, the frequency of each laser signal is independent, and the receiving end can identify each other without disturbing each other.

Second, 6 major advantages

High-end laser beam

The power density of the laser beam is high, which is several thousand times that of infrared products. Even if the attenuation is caused by a harsh environment, it will not affect the normal work.

2. Independent alert system

Each beam of the laser detector has an independent alert function, which can be alarmed by interrupting any one of them.

3 high temperature, low temperature

The laser detector can work normally in an environment of -40° to 70° without any electric heater.

4. Easy and fast adjustment

Comes with a precision adjuster, which is more accurate and quicker with the laser seeker

5. Adapt to all kinds of bad weather

The transmission attenuation of laser light is much smaller than that of infrared and other light beams, and the ability to penetrate rain and fog is strong and is not affected by bad weather.

6. Full protection against no dead ends

The laser has strong monochromaticity, good directionality, and no crosstalk between each other. Therefore, it is possible to implement continuous and cross arming without leaving a security corner.

In just a few short years, we already have a large number of business unit partners, including petroleum, chemical, and coal mining, including perimeter security projects such as PetroChina, Sinopec, CNOOC, and Daqing Oilfield. Intrinsically safe explosion-proof laser intrusion detectors have a broad market, injecting new impetus into China's security industry. At the same time, military applications have added to our national defense.

In the future, the security industry is moving toward intelligent, visual, and cloud-based trends. Feitian Lasers will face new challenges and strengthen technological application innovations that meet the needs of security management such as large-scale events and key targets. Combining the characteristics of security applications in various industrial fields, we study security-related business processes in various industrial fields and propose solutions for personalized applications in different fields such as electricity, telecommunications, medical care, metallurgy, finance, insurance, and schools. The day-to-day management of the industry is combined to meet the needs of intelligent management of users.