1. What is the working principle of the dance mat?
The dance mat can be said to be modified from the PS dance mat, which is the same as the principle of modifying the PS controller into a computer controller. . The electrical principle of the dance mat can be divided into two types. The first method is to use two pieces of thin foam plastic boards of suitable size and slight curvature for each key, and arrange 2 to 3 “naked” pieces on the top and bottom in a staggered manner. Wire, connect all the parts and add the jacket, and it’s ready to use. The second method is to first lay wires on the upper and lower layers of the jacket, and sandwich a thin sponge full of coin-sized holes in the middle. There will be a photoelectric sensor in this thin sponge. Generally speaking, the dance mats sold on the market adopt the second method.
The principle of the dance mat is actually the principle of a photoelectric sensor. The photoelectric sensor converts changes in light intensity. Control is achieved by changes in electrical signals. Photoelectric sensors generally consist of three parts, which are divided into transmitter, receiver and detection circuit. When the photoelectric sensor works, the transmitter aims at the target and emits a beam, and the emitted beam generally comes from a semiconductor light source. After the receiver receives the signal, it is input into the detection circuit, and the detection circuit can filter out the effective signal and apply the signal, thus realizing signal transmission and signal judgment.
2. What are the characteristics of photoelectric sensors?
1. Long detection distance
If the By retaining a detection distance of more than 10m in the radiation pattern, long-distance detection that cannot be achieved by other detection methods (magnetic, ultrasonic, etc.) can be achieved.
2. Fewer restrictions on detection objects
Since the detection principle is based on the shading and reflection caused by the detection object, it is not like proximity sensors that will detect Objects are limited to metal, and it can detect almost all objects such as glass, plastic, wood, and liquids.
3. Short response time
Light itself is high-speed, and the circuit of the sensor is composed of electronic parts, so it does not include mechanical working time, so The response time of dance mats using photoelectric sensors is very short.
4. High resolution
The projection beam can be concentrated on a small light spot through advanced design technology, or throughHigh resolution is achieved by constructing a special light-receiving optical system. It can also detect small objects and perform high-precision position detection.
5. Non-contact detection can be achieved
Detection can be achieved without mechanical contact with the detection object, so it will not cause damage to the detection object and the sensor. . Therefore, the sensor can be used for a long time.
6. Color discrimination can be realized
The photoelectric sensor detects the reflectivity and absorption rate of the light formed by the object according to the wavelength of the light being emitted and detects The color combination of the object varies. Using this property, the color of the detection object can be detected.
7. Easy to adjust
In the type of visible light projection, the light beam is visible to the eyes, making it easy to adjust the position of the detected object. .
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