- Budget: ~RMB 00,000
- Products: Laser Intrusion Detection
- Construction: System Integrator
Laser intrusion detector case display at a petrochemical base in Qingdao, Shandong.
What is a laser intrusion detector?
The laser intrusion detector belongs to the active intrusion detector category, mainly composed of a laser transmitter and a laser receiver. The laser transmitter consists of a laser emitter, a modulation excitation power supply and the corresponding direction-adjusting mechanism; the laser receiver consists of a laser receiver element, a photoelectric signal processor and the corresponding support mechanism. The laser transmitter emits a directional, intense laser beam with good directivity, a single frequency and consistent phase. Using invisible modulated laser beams (single or multiple) to form an alarm line, it adopts blockage-triggered alarming to provide sealed protection of perimeter, planar and three-dimensional spaces. The active laser intrusion detector offers long detection distance, high sensitivity, low false-alarm rate, safety and reliability, good concealment, convenient maintenance and commissioning, and adaptability to various severe natural climates.
Product features of the laser intrusion detector:
Long detection distance and low false-alarm rate. The laser beam has excellent directivity, so its light energy is concentrated and transmission efficiency is high. The laser beam has high emission power density, a small divergence angle, a concentrated beam and good directivity. With the same power device, the power density of the laser beam at the target is hundreds to thousands of times that of an infrared LED beam. Therefore, under the same climate, the transmission attenuation of the laser is far less than that of other similar detectors, with strong rain and fog penetration and a detection distance of hundreds of meters to several kilometers, ensuring normal long-distance operation and reducing false alarms in severe weather.
Closed-circuit transmission with no mutual interference. The laser beam is transmitted in a closed circuit, so it avoids the mutual-interference problem that Infrared Beam Detectors face when continuously arranged in a straight line or when adjacent systems are close; it can be arranged in a continuous straight line over long distances or in a close-distance crossing layout. It also avoids the problem of leaked infrared light interfering with other sensitive infrared equipment nearby.
Strong resistance to external stray light and electromagnetic interference. A well-designed optical receiver and high-power-density transmitter give the system strong anti-interference capability. Leveraging the excellent monochromaticity of the laser beam and controllable spot size, the system can work normally in heavily interfered environments.
Strong protection capability. Because the laser system has no mutual-interference problem in continuous straight-line or small-angle arrangement (laser repeaters are used for long distances), continuous or crossed protection can be implemented as needed in important sections. The laser system can deploy multiple independent beams in a planar distribution to form a very tight warning plane. In continuous arrangement there is no crosstalk; each beam protects independently, and blocking any beam triggers an alarm, enabling a very tight warning plane as well as three-dimensional deployment. It can be installed as a concealed fixed protection, or set up temporarily in a mobile or dynamic way.
Quick on-site commissioning and convenient maintenance. If equipped with a dedicated laser positioning instrument, the spot position at each point can be checked at any time. Where branches or leaves block the beam during propagation, and in which direction and by how far the spot deviates from the center at a turning point or receiver, can be directly determined, enabling accurate and rapid adjustment.
Long service life and low maintenance cost. Making full use of the characteristics of the laser system reduces equipment purchase costs, construction work and impact on the surrounding appearance. The laser tube is easy to replace, so maintenance cost is low.
Stable system, good reliability and high sensitivity. The whole unit uses steel and aluminum. The mechanical structure is precise; the laser system and optical components are machined to precision-instrument standards with a stable internal structure, and installation is fully firm and reliable. The laser intrusion detection system is fixed on a steel pipe and an integrally welded flange base, and mounted on a concrete foundation by chemical anchoring. In addition to an inner cover against wind, sand and rain, an outer cover is separately fixed, isolating the impact of strong wind on the stability of the mechanism.
Ultra-low power design, operating current <50uA. Powered by an external 12VDC supply, it works normally from -40C to 70C without any electric heater.
High sensitivity: the laser alarm system outputs potential-free contacts and is compatible with various other systems.
Pet and small-animal interference is prevented, with an extremely low false-alarm rate. The response time of the laser intrusion detector is adjustable from 5 ms to 1000 ms (similar active detectors range from 50 ms to 500 ms), and can be adjusted according to the installation environment, giving a wider environmental adaptation range.
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