Myopia posture prevention algorithm with use of multi-path close range detection
A short-range, anti-myopia technology, applied in the direction of alarms, instruments, etc., can solve the problems of high false alarm rate, unusable, unable to adapt to life scenarios, etc., to reduce the false alarm rate and improve the accuracy.
Inactive Publication Date: 2017-03-22
上海细柳信息科技有限公司
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Problems solved by technology
However, this kind of detection is often carried out by a single device, which is often not suitable for complex life scenarios in daily use, and the false positive rate is so high that it cannot be used
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Embodiment 1
[0029] Example 1: Scene List
[0030]
[0031]
[0032] In these scenarios, the only one that is in an incorrect sitting position is scene three, and the other scenes are common situations that students or children will appear in the normal learning and reading process. If these scenes are also misjudged as wrong postures and cause an alarm, Children will abandon it because of its frequent alarms.
[0033] In order to ensure the detection of these scenarios, first find the technical limitations.
[0034] The technical limitations and features are:
[0035] 1. Infrared short-distance measurement ranges from 5cm-60cm; ultrasonic short-distance measurement ranges from about 5cm-150cm; ultrasound can be accurate to the cm level, and infrared accuracy is roughly between 2-3cm; but ultrasound is not sensitive to angles and materials The impact is very large, if the irradiation surface is a slope, it is easy to cause mismeasurement;
[0036] 2. All have an irradiation angle,...
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The invention discloses a myopia posture prevention algorithm with the use of multi-path close range detection. The myopia posture prevention algorithm comprises a first step of initialization: (1) the first use is set, the distances d01 and d02 between a sensor and a person are obtained, (2) in the first use, sensors can be pulled, thus the height of an upper path sensor and the forehead height of the person sitting in front of a desk are consistent and the height of a lower path sensor and the height of the chest of the person are consistent, according to the sitting posture of a normal adult person, the height of the lower path sensor is about 20 cm, and the height of the upper path sensor is about 45cm, (3) a condition that the sensors just face a human body is ensured, since the irradiation angles of the sensors are 15 degrees about, and according to the distance which is 60 cm about between the sensors and the person, the irradiation range is a circle with the diameter of 30 cm, and a second step of detection. According to the myopia posture prevention algorithm, the accuracy of detection can be greatly improved, and the false alarm rate is reduced.
Description
technical field [0001] The present invention relates to, in particular, an anti-myopia posture algorithm utilizing multi-path close-range detection. Background technique [0002] Improper posture when students study is an important reason for inducing myopia. At present, there are anti-sitting devices placed on the table, most of which use single-channel infrared, ultrasonic, microwave and other close-range detection methods to detect the distance between the human body and the device. Then judge whether the human body is in a wrong posture according to the distance. However, this kind of detection is often carried out by a single device, which is often not suitable for complex life scenarios in daily use, and the false positive rate is so high that it cannot be used. [0003] In summary, the present invention designs a posture algorithm for preventing myopia using multi-channel short-distance detection. Contents of the invention [0004] Aiming at the deficiencies in t...
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CPCG08B21/24
Inventor 徐征
Owner 上海细柳信息科技有限公司