Last modified by Mengting Qiu on 2025/02/26 15:04
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From version < 100.1 >
edited by Xiaoling
on 2022/06/10 11:30
To version < 94.7 >
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... ... @@ -912,56 +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 -
965 965  = 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
966 966  
967 967  (((
... ... @@ -978,7 +978,7 @@
978 978  (((
979 979  
980 980  
981 -There are two kinds of commands to configure LLDS12, they are:
932 +There are two kinds of commands to configure LSPH01, they are:
982 982  )))
983 983  
984 984  * (((
... ... @@ -1009,12 +1009,12 @@
1009 1009  )))
1010 1010  
1011 1011  (((
1012 -These commands only valid for LLDS12, as below:
963 +These commands only valid for LSPH01, as below:
1013 1013  )))
1014 1014  
1015 1015  
1016 1016  
1017 -== 4.1  Set Transmit Interval Time ==
968 +== 3.1 Set Transmit Interval Time ==
1018 1018  
1019 1019  Feature: Change LoRaWAN End Node Transmit Interval.
1020 1020  
... ... @@ -1046,17 +1046,15 @@
1046 1046  
1047 1047  )))
1048 1048  
1049 -== 4.2  Set Interrupt Mode ==
1000 +== 3.2 Set Interrupt Mode ==
1050 1050  
1051 1051  Feature, Set Interrupt mode for GPIO_EXIT.
1052 1052  
1053 1053  (% style="color:#037691" %)**AT Command: AT+INTMOD**
1054 1054  
1055 -[[image:image-20220610105806-2.png]]
1006 +[[image:image-20220607171716-9.png]]
1056 1056  
1057 1057  
1058 -
1059 -
1060 1060  (((
1061 1061  (% style="color:#037691" %)**Downlink Command: 0x06**
1062 1062  )))
... ... @@ -1076,9 +1076,20 @@
1076 1076  Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1077 1077  )))
1078 1078  
1028 +(((
1029 +
1030 +)))
1079 1079  
1080 -== 4.3  Get Firmware Version Info ==
1081 1081  
1033 +
1034 +== 3.3 Calibrate Sensor ==
1035 +
1036 +Detail See [[Calibration Guide>>||anchor="H2.7Calibration"]] for the user of 0x13 and 0x14 downlink commands
1037 +
1038 +
1039 +
1040 +== 3.4 Get Firmware Version Info ==
1041 +
1082 1082  Feature: use downlink to get firmware version.
1083 1083  
1084 1084  (% style="color:#037691" %)**Downlink Command: 0x26**
... ... @@ -1109,7 +1109,7 @@
1109 1109  Always 0x02
1110 1110  )))
1111 1111  
1112 -**Software Type**: Always 0x03 for LLDS12
1072 +**Software Type**: Always 0x03 for LSPH01
1113 1113  
1114 1114  
1115 1115  **Frequency Band**:
... ... @@ -1155,7 +1155,7 @@
1155 1155  
1156 1156  0x06: LSNPK01
1157 1157  
1158 -0x07: LLDS12
1118 +0x07: LDDS12
1159 1159  
1160 1160  
1161 1161  
... ... @@ -1340,6 +1340,7 @@
1340 1340  * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1341 1341  * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1342 1342  
1303 +
1343 1343  = 10. ​ Packing Info =
1344 1344  
1345 1345  
... ... @@ -1354,6 +1354,7 @@
1354 1354  * Package Size / pcs : cm
1355 1355  * Weight / pcs : g
1356 1356  
1318 +
1357 1357  = 11.  ​Support =
1358 1358  
1359 1359  * 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.
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