Infrared sensing intelligent chopsticks are smart tableware that senses the user's eating speed by using the infrared sensor to change the light refraction during the movement of the eater using chopsticks. Currently, there is no similar product in China, and there is a blank market for smart tableware. . Due to the fast pace and pressure of urban life, in order to improve work efficiency, people usually save time in eating, and the most used tableware is chopsticks. However, traditional chopsticks can only be used as tableware, and it does not help to control the situation of people gorging and slowing down the pace of eating to achieve healthy health.
Infrared sensing smart chopsticks have obvious effects in controlling the user's eating speed. A study by Ben Gurion University in Israel found that people with bad appetites died early. Chinese medicine has the saying that "people are based on stomach." The stomach is not only an important organ of the digestive system, but also participates in mediating the activities of almost all organs of the body. Therefore, it is recommended that people eat and eat slowly, and chew no less than 20 times per mouth to reduce the burden on the stomach. However, it is difficult for modern people to control the eating speed when eating. Infrared sensing smart chopsticks will pass the top LED at this time. Â The warning light prompts the user to eat too fast and make the lifestyle healthier.
Infrared sensors intelligent chopsticks divided into two parts and the holding portion holding portion, the user is acquired signal is eating too fast through the inside portion of the hand-held infrared sensor, a counter and a magnitude comparator, then the information is transmitted to the nip portion led A light to alert the user if the food is eating too fast. In contrast, infrared-sensing smart chopsticks have the following advantages: First, they are designed to be detachable and to avoid the influence of electronic products entering the water during cleaning. The second is to charge through the USB interface, saving space for the battery, making the product light and easy to use. The third is to conform to the Chinese people's eating habits and design the circuit together with the chopstick body.
1. Intelligent chopsticks structure design
The infrared sensing smart chopsticks are divided into two parts: a detachable hand piece and a clamping part connected by a card slot. The hand-held part is the main part of the chopsticks, with built-in infrared sensors, counters and numerical comparators. The clamping part is the overall power supply part of the smart chopsticks. It has a USB rechargeable battery and a USB charging socket and LED lights to alert the user to eating too fast. The overall shape of the product is shown in Figure 1.
2, handheld hardware circuit design
The shape of the hand-held part is the same as that of a traditional chopstick, and is a long cylindrical shape that is tapered. The interior is different from the traditional chopsticks. The infrared sensing smart chopsticks have built-in sensing devices in the handheld part. The main components are infrared sensors, counters and numerical comparators. The hand-held part is the main part of the chopsticks. The infrared sensor is inside the chopsticks 40 mm away from the bottom end of the chopsticks. The infrared light reflection changes caused by the change of the angle of the chopsticks during the movement, and the signal is transmitted to the counter by the infrared sensor. The frequency of eating by the eater begins to count. The counting signal is converted into a voltage signal by a photoresistor, and the voltage signal is amplified by an amplifying circuit. The amplified signal is connected to the counter input terminal, and the counter pulse (CLK) of the counter times the sampling signal.
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