User Manual

SJ-PM-TFmini-T-01 A03

Benewake (Beijing) Co. Ltd.

Page8

①: Represents the detection blind area of TFmini, 0-30cm, within which the data is unreliable.

②: Represents the operating range of TFmini under extreme condition, which generally is 0.3-3m. Extreme

condition refers to the outdoor glare (of which illumination intensity is around 100klux outdoors at noon in

summer) and detection of black target (with reflectivity of 10%).

③: Represents the operating range of TFmini for white target under normal sunshine condition (with

illumination intensity of around 70klux), which covers the range of ② and is 0.3-7m.

④: Represents the operating range of TFmini at the indoor environment or considerably weak ambient light

environment, which is 0.3-12m.

⑤: Represents the Minimum side length of effective detection for TFmini at the different distances. The

data will not be stable and reliable unless “the side length of detection object” is equal to or more than the

Minimum side length. The Minimum side length of effective detection depends on the FOV of TFmini (the

term of FOV generally refers to the smaller value between the receiving angle and the transmitting angle),

which is calculated as follows:

d = 2 ∙ D ∙ tanβ

In the above formula, d is the Minimum side length of effective detection; D is detecting range; β is the

half of the value of the receiving angle of TFmini, 1.15°. Correspondence between the Minimum side length

of effective detection and detecting range in general is given in Table 2.

Table 2 the Minimum side length of effective detection corresponding to Detecting Range

Detecting

range

10m

11m

12m

Minimum

side length

4cm

8cm

12cm

16cm

20cm

24cm

28cm

32cm

36cm

40cm

44cm

48cm

Figure 2 Schematics of Range of distance measurement and Effectiveness of the Product