Infrared People Counter

What is a infrared people counter?

Infrared people counter is a passenger flow counting means suitable for shopping malls, supermarkets, museums, parks, exhibition halls, libraries, scenic spots, parks, hospitals, cinemas, airports and other places. Two infrared passenger flow terminals are installed on both sides to shoot each other, identify the moving object and count the blocked infrared refraction, that is, when the object blocks the infrared, it will be counted as “1” after leaving.

Introduction of infrared people counter

The equipment is mainly installed at both ends of the designated channel and door to detect, process, analyze and count the passenger flow in real time after networking and interworking. Among them, the infrared photoelectric transmitting and receiving unit, control / judgment unit and data transmission unit are mainly used, that is, a group of infrared rays are used to detect objects and human bodies, collect active bodies, process and analyze them, and transmit them to the background system for statistical output report after analysis.
The infrared passenger flow statistics system provides the following reports:

• 1. Provide multi-dimensional reports such as year, month, week and day;
• 2. Free statistics of passenger flow in and out directions;
• 3. Provide access time of real-time passenger flow;
• 4. Count the number of people detained, detention time and number of people in the area;
• 5. Provide month on month and year-on-year passenger flow data output reports, etc.

There are three common factors that affect the accuracy of infrared passenger flow statistics: first, it is easy to recognize non human moving objects such as suitcases, cargo boxes and strollers as a person; The second is the phenomenon of missing numbers when many people pass in the same row, side by side and overlap; The third is affected by the external environment, such as the thermal radiation of surrounding objects, atmospheric absorption, distance and other conditions.
From the perspective of many passenger flow statistics equipment on the market, the infrared passenger flow statistics terminal is relatively cheap, but its accuracy is also relatively low. Therefore, for comprehensive selection, if the passenger flow is not particularly dense and the accuracy of passenger flow data is not high, infrared passenger flow statistics can be selected for two reasons: first, the price of the equipment is low, which can reduce the cost of investment; Second, the passenger flow of the outer red line can meet the basic needs of single person statistics.

Working principle of infrared passenger people counter

The infrared emitted by the external line belongs to an electromagnetic ray, and its characteristics are equivalent to radio or X-ray. The visible light wave of human eyes is 380nm-780nm, and the long ray with the emission wavelength of 780nm-1mm is called infrared. The infrared passenger people counter produced by our company gives priority to the near infrared close to the visible wavelength.
When the infrared counter works, the modulation pulse generated by the internal oscillation circuit passes through the reflection circuit, and the light pulse is radiated by the transmitting tube. When the measured object enters the action range of the light receiver, the reflected light pulse enters the photodiode. The optical pulse is demodulated into an electric pulse signal in the receiving circuit, then amplified by the amplifier and synchronously gated and shaped, then the interference is eliminated by digital integration or RC integration, and finally the driver is triggered to output the passenger flow counting signal by delay (or no delay).

1. Direct reflection infrared passenger people counter

Direct reflection infrared passenger people counter is a sensor integrating transmitter and receiver. When a detected human body passes by, it reflects a sufficient amount of light emitted by the infrared transmitter to the receiver, so the counter generates a counting signal. When the surface of the detected object is bright or its reflectance is very high, the direct reflection infrared passenger people counter is the preferred counter.

2. Reflective plate reflective infrared passenger people counter

Reflective plate reflective infrared passenger people counter also integrates the transmitter and receiver. The light emitted by the infrared transmitter passes through the reflector and is reflected back to the receiver. When the detected human body passes and completely blocks the light, the infrared passenger people counter generates the detection and counting personnel signal.

3. Opposed infrared passenger people counter

The opposed infrared passenger people counter comprises a transmitter and a receiver which are structurally separated from each other and whose optical axes are placed opposite to each other, and the light emitted by the transmitter directly enters the receiver. When the detected object passes between the transmitter and the receiver and blocks the light, the infrared passenger people counter generates a counting signal. When the detected object is opaque, the infrared passenger people counter is the most reliable detection mode.
China people counter manufacturer www.tractility.com offers infrared people counter.