Getting Started

Installation height and tilt angle

Depending on the installation height of the product, it is recommended to use an external bracket to adjust the tilt angle of the product to suit user-friendly identification of different heights. The recommended tilt angle and identification height coverage range at various installation heights are shown in the following table:

Cover plate recommendation and installation method

The AI vision algorithm module is assembled inside the product, and a cover plate needs to be attached to the top of the AI ​​vision algorithm module to prevent water, dust and damage.

1. The cover plate and the module are installed directly

The top of the lens of the AI vision algorithm module and the top of the LED lamp bead are basically on the same horizontal plane. When installing the AI vision algorithm module, it is recommended that the lens on the AI vision algorithm module and the cover plate are as close as possible but not in contact, with a gap of ≤1mm.

The contact surface between the lens and the cover plate is shielded by light-shielding foam (thickness: 2~3mm) (foam is already standard when leaving the factory), and the light-shielding foam is close to the cover plate. The hole of the light-shielding foam is outside the visible area of the camera to avoid blocking the visible area. The opening area of the cover must also be outside the visible area of the camera to avoid blocking the visible area of the camera.

If the gap between the cover and the lens is large, the LED light will be reflected into the camera through the cover, causing the image to be overexposed and the portrait cannot be recognized normally.

2. Size of the cover window

When making the cover, it is necessary to leave a transparent window in the visible area of ​​the camera and the irradiation area of ​​the LED light, and the transparent light transmittance should reach 90% or more.

Based on the viewing angle of the camera and LED light, and taking into account the tolerance of mold opening and installation tolerance, it is recommended that the horizontal opening angle of the LED light be ≥90°; the horizontal opening angle of the camera be ≥60°, and the vertical opening angle of the two be ≥78° (as shown below). It is recommended that the cover plate be 2.5mm away from the light board, the lens opening diameter be 6mm, and the LED light hole diameter be 6.3mm, which can meet the requirement of not blocking the field of view.

3. Choice of cover

(1) Cover material: tempered glass or acrylic
(2) It is recommended to make the window of the white light LED part of the cover into a long strip. As shown in the figure, a light-diffusing film can be pasted on the back of the long strip window, or white light-transmitting ink can be sprayed when making the cover. To prevent glare caused by white light on
(3) The infrared light and camera window of the cover are transparent, and the light transmittance of the transparent part is ≥90% (850nm band)
(4) Cover thickness: 0.55mm~1.5mm, 1mm is recommended as the best
(5) Cover design reference

Assembly of shell and bracket

When the algorithm Al vision algorithm module is placed on the shell or bracket, it should be positioned to prevent movement when screwing, causing the center of the camera to deviate from the hole position and block the imaging.

The diameter of the through holes on both sides of the AI ​​vision algorithm module is 2.2mm, and M2 screws are preferred.

After installation, the center of the camera should be aligned with the center of the housing or bracket through-hole to ensure that the camera imaging is not blocked. The algorithm AI vision algorithm module cannot be touched or squeezed by other structures to avoid short circuit or damage.