Manual
SJ-PM-TFmini Plus-T-01 A04
Benewake (Beijing) Co. Ltd.
Page8
③ 3.6°is the theoretical value, from which the actual value will be different. The theoretical divergence angle is 6°.
④ Only frame rates meeting the formula–1000/n (n is positive integer) can be set. The default frame rate is 100Hz.
2.4 Repeatability
The TFmini Plus's range repeat accuracy is directly related to the strength value measured and the output
frame rate (frequence). The ranging repeat accuracy is characterized by the standard deviation of ranging.
The average ranging accuracy of the TFmini Plus can be estimated by the following formula:
Distance_STDcm p00 p10∗x p01∗y p20∗x^2 p11∗x∗y
In the formula, x is log
𝑆𝑡𝑟𝑒𝑛𝑔𝑡ℎ, y is log
𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑒𝐻𝑧, p00, p01, p10, p20 and p11 are constant
coefficients, and the values are as follows:
p00 0.9758
p01 1.175
p10 0.6072
p20 0.09501
p11 0.2904
The above formula only calculates the average reference value. There are some differences in actual results
due to differences in each product.
For your convenience, add a simple statistics table for this query, as shown below:
Table 2 Statistics: the standard deviation of detected distances
Note: the unit of AMP is a.u., the unit of frequency is Hz, and the unit of distance standard deviation is
cm.