What is a vehicle detector? 　What are the specific types of vehicle detectors?

What is a vehicle detector?

A more standard name for a vehicle detector should be: traffic information detector. It is a detection instrument invented to detect road traffic information.

Vehicle Detector Classification

At present, high-tech technologies such as electromagnetic sensing technology, ultrasonic sensing technology, radar detection technology, video detection technology, computer technology, and communication technology are widely used in traffic detection systems or traffic information acquisition systems at home and abroad. Correspondingly, traffic information detectors mainly include: inductive loop detectors (ring-type induction coils), ultrasonic detectors, infrared detectors, radar detectors, video detectors, etc.　　 The traffic information detector can be divided into buried type and suspended type according to the installation method. In terms of cost performance and high reliability, the toroidal coil type vehicle detector is still the most used, but in recent years, more and more video detectors are used.

Classification of vehicle detectors

• 1. Loop coil vehicle detector The loop coil detector (also known as ground sensor, mostly buried detection system) is a traditional traffic detector, and it is currently the world’s most used detection equipment. The vehicle passes through the loop coil buried under the road to cause the magnetic field of the coil to change. The detector calculates the traffic parameters such as the flow, speed, time occupancy and length of the vehicle and uploads it to the central control system to meet the requirements of the traffic control system. need. This method is technically mature, easy to master, and has the advantages of lower cost.
• 2. Wave frequency vehicle detector Wave frequency vehicle detector (mostly suspension detection system) is a detector that induces electromagnetic waves emitted by vehicles such as microwave, ultrasonic and infrared. Here we mainly introduce microwave vehicle detectors (RTMS), it is a low-cost, superior-performance traffic detector, which can be widely used in the detection of traffic information on urban roads and highways.
• 3. Video vehicle detector The video vehicle detector uses a video camera as a sensor, and a virtual coil is set in the video range, that is, the detection area. When the vehicle enters the detection area, the background gray value changes, so as to know the vehicle Existence, and to detect the flow and speed of the vehicle.