CARDET-501 Operation Description

Sensor Characteristics

CARDET-501 sensor is a synthetic smart vehicle detector that is comprised of a magnetic sensor and a cutting edge RADAR sensor. It was designed to detect the side wall of a vehicle which can replace a conventional loop coil.

Sensing distance of a C-501

In the long-distance mode, people can also be detected.

Allowable detection angle

Diagram shows a car viewed from the side, indicating a maximum allowable angle. The angle is shown as ±25° for the 0.1-2.5m range and ±10° for the 2.5-4.5m range.

⚠️ Caution: Never touch or move a working sensor.

Installation

Height

The installation height will be good at 0.7 m from the surface of the road.

Diagram shows a car with a vertical line indicating the sensor mounted at 0.7m from the road surface.

Direction

The direction of C-501 must be orthogonal with the side wall of vehicle. ❌ Do not rotate the sensor which makes false detection characteristics.

Diagrams show a car from above with 'BAD Direction' indicated on the sides and 'GOOD Direction' indicated at the rear. It also shows three sensor units, with 'XOX' symbols indicating incorrect orientation and 'XOX' symbols indicating correct orientation.

Caution

Do not install C-501 sensors face to face. ✔️ Keep the distance between sensors at least 1.5m. ✔️ Keep the distance between sensor and relay controller at least 0.5m.

Diagrams show two sensors with a 'X' symbol between them, indicating they should not face each other. Another diagram shows a sensor and relay controller with a line indicating a minimum distance of 1.5m between sensors and 0.5m between sensor and controller.

Trigger for a LPR

For LPR trigger mode, install the sensor 2.7m ~ 4.0m in front the LPR box. (Distance may vary depending on vehicle speed.)

Diagram shows a car and a CARDET-501 sensor positioned in front of an LPR box, with a distance indicated as 2.7m ~ 4.0m.

Check before operation

• After fixing the sensor first, turn on the power with no people or vehicle in front of the sensor, then initialization will proceed for about 1 second.
• Do not move the sensor while it is in operation. The sensor must be fixed (do not attach it to a revolving door.)
• Please check the magnetic disturbance such as a big motor or a relay near the sensor.
• You can test the sensor by a large steel plate (30cm x 30cm or more) in an open space. In this case, the detection distance can be shortened, but there is no problem in real vehicles.
• Radar sensor frequency is 57-64 Ghz and EIRP is 11 dBm.
• The CARDET-501 can be operated in at least one Member State without infringing applicable requirements on the use of radio spectrum.

Caution for external case

If you want to insert the sensor in user's additional case, then the case should have a wide hole for RADAR sensor in CARDET-501 (upper 60%).

If there is no hole for RADAR sensor, then the sensor does not operate.

❌ Do not rotate a CARDET-501, because the sensor has a horizontal radiation direction.

Diagram shows the C-501 sensor head with a label '40mm x 45 mm Hole for RADAR'. It also shows the Relay Controller with labeled ports: Detection LED, Power LED, 12V DC input, SENSOR Connector (CON A), and Relay Terminal (NO, NC, COM).

Connection to a Relay controller

If user wants to extend the cable between the sensor head and the relay controller more than 80m, then user should use an adaptor that has a bigger current capacity (more than 2A). Please check the supply voltage drop inside the sensor head for the case of the cable extension.

Here are two connection examples of the relay controller, the dry contact (RELAY) will enable you to interface easily CARDET to your system.

Diagram shows a relay connection with COM, Detect, NC, and NO terminals. Another diagram shows connection examples for AC 110V with an alarming light, and a User's Device connected via a pull-up resistor, with GND when detected and +24V for the normal state indicated.

Normally (no vehicle) terminals COM and NC are connected, and if there is a vehicle to detect, then terminal COM and NO are connected (COM and NC are separated.)

Change of operation mode

If you open the upper cover of CARDET-501 sensor head, then you can find a rotary and a DIP switches and a small volume as following. User can choose the mode of operations among following 4 modes (table 2). Power must be off when the switches are changed.

Image shows the sensor head with DIP switches labeled 1-6, a rotary mode switch, and a delay (timer) adjustment knob.

User can change the operation mode and sensitivity of the sensor by following instruction. CARDET-501 has four kind of operation modes (LPR / Bar control / Long distance / parking). Please be careful when adjust the small switch.

Diagrams show rotary switches set for LPR (0-2), Parking bar control (3-5), Long Distance (6-8), and Parking (9).

Output type

REBOUND mode: Even if the sensor is momentarily turned off, the sensor output turns on immediately when an object is detected (safety function for closing a parking bar).

Timing diagram of the sensor output

Diagram illustrates the sensor output timing for different modes. 'Default Output' shows a continuous signal while an object is present. 'Short Pulse' shows a brief output pulse. 'EXIT mode' shows a fixed duration pulse. DIP switch settings are correlated with these outputs.

Setup for delay or timer

You can adjust the OFF delay time or timer of the output signal by adjusting the parts below. Adjust by turning clockwise or counterclockwise using a small flat screwdriver. Turning it counterclockwise (left) decreases it, and turning it clockwise (right) increases it.

Diagram shows a rotary dial with 'min' and 'max' markings, indicating adjustment of delay time.

Sensor Initialization

When a CARDET-501 is powered on, the sensor executes the automatic calibration to make the magnetic map around it on the spot (approx. 1 sec.), so during the calibration, human or car should not be in front of the sensor.

Specification

Cautions

CARDET-501 uses Earth magnetic field, so it might make an incorrect operation against severe electromagnet noises, motorcycles, a large size truck, a motor beside the sensor, etc. User should design the whole system will be safe even if the sensor makes a false operation. There is no responsibility for the makers and distributors for safety issues.

CRADET-501 Quick Test Guide

1. Fix the sensor in a clear space

Please secure a wide area for the test. The max. sensing distance of it is 4.5m (in long distance mode). Do not move the sensor after turned on.

Diagram shows a sensor mounted above a floor, with clearance indicated: 'No object in 6 feets (1.8m)' and '2.7 feets (0.8 meter)' from the sensor to the floor.

2. After turn on the sensor, attach a magnet for driver to the iron plate (or notebook) and pass it in front of the sensor.

Diagram shows a hand holding a magnet (10-30 cm) near an iron plate. Another diagram shows a 'Bad test' scenario with a hand holding a magnet near the sensor, with a red cross over it.

CARDET-501 is a synthetic sensor designed to detect the side of a car, so it needs a wide reflection area to detect, so please use a big iron plate (or notebook) with a driver for the basic operation test. With a small iron object, the detection distance will be shortened. This is for filtering out an another object except a car, so do not worry about the shortened detection distance in this test. For the case of a real car, CARDET-501 can detect a car from 2.5 meters away with a high reliability. (Up to 4.5 meters when set in long distance mode)

FCC Compliance

FCC Part 15.105 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and the receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help.

FCC Part 15.19 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC Part 15.21 Any changes or modifications (including the antennas) to this device that are not expressly approved by the manufacturer may void the user's authority to operate the equipment.

RF Radiation Exposure Statement This device should be installed and operated with minimum 20 cm between the radiator and your body.