Changes for page LDDS45 - LoRaWAN Distance Detection Sensor User Manual
Last modified by Mengting Qiu on 2025/02/26 15:04
Summary
-
Page properties (1 modified, 0 added, 0 removed)
-
Attachments (0 modified, 0 added, 4 removed)
Details
- Page properties
-
- Content
-
... ... @@ -912,57 +912,7 @@ 912 912 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>path:/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]] 913 913 914 914 915 -= 3. LiDAR ToF Measurement = 916 916 917 -== 3.1 Principle of Distance Measurement == 918 - 919 -The LiDAR probe is based on TOF, namely, Time of Flight principle. To be specific, the product emits modulation wave of near infrared ray on a periodic basis, which will be reflected after contacting object. The product obtains the time of flight by measuring round-trip phase difference and then calculates relative range between the product and the detection object, as shown below. 920 - 921 -[[image:1654831757579-263.png]] 922 - 923 - 924 - 925 -== 3.2 Distance Measurement Characteristics == 926 - 927 -With optimization of light path and algorithm, The LiDAR probe has minimized influence from external environment on distance measurement performance. Despite that, the range of distance measurement may still be affected by the environment illumination intensity and the reflectivity of detection object. As shown in below: 928 - 929 -[[image:1654831774373-275.png]] 930 - 931 - 932 -①Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable. 933 - 934 -②Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m. 935 - 936 -③Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m. 937 - 938 - 939 -Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at the different distances. The diameter of light spot depends on the FOV of The LiDAR probe (the term of FOV generally refers to the smaller value between the receiving angle and the transmitting angle), which is calculated as follows: 940 - 941 - 942 -[[image:1654831797521-720.png]] 943 - 944 - 945 -In the formula above, d is the diameter of light spot; D is detecting range; β is the value of the receiving angle of The LiDAR probe, 3.6°. Correspondence between the diameter of light spot and detecting range is given in Table below. 946 - 947 -[[image:1654831810009-716.png]] 948 - 949 - 950 -If the light spot reaches two objects with different distances, as shown in Figure 3, the output distance value will be a value between the actual distance values of the two objects. For a high accuracy requirement in practice, the above situation should be noticed to avoid the measurement error. 951 - 952 - 953 - 954 -== 3.3 Notice of usage: == 955 - 956 -Possible invalid /wrong reading for LiDAR ToF tech: 957 - 958 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings. 959 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong. 960 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe. 961 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window. 962 - 963 - 964 - 965 - 966 966 = 4. Configure LLDS12 via AT Command or LoRaWAN Downlink = 967 967 968 968 ((( ... ... @@ -1053,11 +1053,9 @@ 1053 1053 1054 1054 (% style="color:#037691" %)**AT Command: AT+INTMOD** 1055 1055 1056 -[[image:image-202206 10105806-2.png]]1006 +[[image:image-20220607171716-9.png]] 1057 1057 1058 1058 1059 - 1060 - 1061 1061 ((( 1062 1062 (% style="color:#037691" %)**Downlink Command: 0x06** 1063 1063 ))) ... ... @@ -1079,7 +1079,6 @@ 1079 1079 1080 1080 1081 1081 1082 - 1083 1083 == 4.3 Get Firmware Version Info == 1084 1084 1085 1085 Feature: use downlink to get firmware version. ... ... @@ -1112,7 +1112,7 @@ 1112 1112 Always 0x02 1113 1113 ))) 1114 1114 1115 -**Software Type**: Always 0x03 for L LDS121062 +**Software Type**: Always 0x03 for LSPH01 1116 1116 1117 1117 1118 1118 **Frequency Band**: ... ... @@ -1158,7 +1158,7 @@ 1158 1158 1159 1159 0x06: LSNPK01 1160 1160 1161 -0x07: L LDS121108 +0x07: LDDS12 1162 1162 1163 1163 1164 1164 ... ... @@ -1343,6 +1343,7 @@ 1343 1343 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band 1344 1344 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band 1345 1345 1293 + 1346 1346 = 10. Packing Info = 1347 1347 1348 1348 ... ... @@ -1357,6 +1357,7 @@ 1357 1357 * Package Size / pcs : cm 1358 1358 * Weight / pcs : g 1359 1359 1308 + 1360 1360 = 11. Support = 1361 1361 1362 1362 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
- 1654831757579-263.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -59.3 KB - Content
- 1654831774373-275.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -91.8 KB - Content
- 1654831797521-720.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -5.1 KB - Content
- 1654831810009-716.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.Xiaoling - Size
-
... ... @@ -1,1 +1,0 @@ 1 -59.5 KB - Content