Myopia prevention and control device and detection method
A technology for prevention and control of myopia, applied in the direction of instruments, electrical transmission signal systems, alarms, etc., can solve problems such as lack, difficulty in finding whether the sitting posture is standard, unable to supervise and guide the sitting posture of young students for a long time, and achieve comparison The results are precise
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Embodiment 1
[0047] Embodiment 1, myopia prevention and control device, with reference to figure 1 , figure 2 with image 3 , including a housing, the housing includes a base plate 2, a slant plate 1 is fixed and inclined on the base plate 2, one end of the slant plate 1 is connected to the base plate 2 through a curved plate 3, and the slant plate 1, the base plate 2 and the curved plate 3 are connected in turn ;
[0048] The bottom plate 2 is used to be placed on the desktop, and the inclined plate 1 and the bottom plate 2 are arranged obliquely, so that one end of the inclined plate 1 is directly connected to the bottom plate 2, and the other end of the inclined plate 1 is connected to the bottom plate 2 through a curved plate 3, and the curved plate 3 is connected to the bottom plate 2. The outer protrusion; the distance sensor 4 is installed on the curved panel 3, and the distance sensor 4 can be a TOF sensor. The detection light wave sent by the distance sensor 4 itself will form ...
Embodiment 2
[0080] Embodiment 2, a kind of detection method based on embodiment 1 myopia prevention and control device, step comprises as follows:
[0081] (a) Set the normal threshold of the sitting posture feature information and store it in the control module. This threshold input can be set to a threshold of a specific height by default in the factory, or it can be input by the teenager through the button on the outside of the housing during actual use. height, a suitable threshold is calculated by the microprocessor according to the height;
[0082] (b) After the threshold is selected, place the case on the table, the bottom plate 2 of the case is attached to the table, the distance sensor 4 faces the user, and the case is placed at 40cm from the edge of the table, keeping 6cm between the user and the edge of the table to obtain the current user's sitting posture feature information, that is, the actual distance from the user's chin to the distance sensor 4 at this moment, and the su...
Embodiment 3
[0087] Embodiment 3, its difference with embodiment 1 is that, with reference to Image 6 The distance sensor 4 is rotatably connected to the curved panel 3 through the rotating shaft 51, and a damping ring 52 is installed between the rotating shaft 51 and the distance sensor 4. The frictional resistance of the damping ring 52 enables the distance sensor 4 to be positioned at a rotated angle.
[0088] The curved panel 3 is provided with 3 rotating stations for the distance sensor 4, respectively indicating that the projection angles are 35 degrees, 40 degrees and 50 degrees;
[0089] If the height is below 130cm, the projection angle is 35 degrees;
[0090] If the height is between 130cm-165cm, the projection angle is 40 degrees;
[0091] If the height is above 165cm, the projection angle is 55 degrees;
[0092] This design is to further increase the accuracy of sitting posture detection.
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