Changes for page LDDS45 - LoRaWAN Distance Detection Sensor User Manual
Last modified by Mengting Qiu on 2025/02/26 15:04
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... ... @@ -894,76 +894,25 @@ 894 894 895 895 896 896 897 -== 2. 7LED Indicator ==897 +== 2.9 LED Indicator == 898 898 899 -The L LDS12has an internal LED which is to show the status of different state.899 +The LSPH01 has an internal LED which is to show the status of different state. 900 900 901 901 * The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected. 902 902 * Blink once when device transmit a packet. 903 903 904 +== 2.10 Firmware Change Log == 904 904 905 905 907 +**Firmware download link:** 906 906 907 - == 2.8 FirmwareChangeg ==909 +[[http:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/LSPH01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]] 908 908 909 909 910 -**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LLDS12/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LLDS12/Firmware/]] 911 - 912 - 913 913 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>path:/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]] 914 914 915 915 916 916 917 -= 3. LiDAR ToF Measurement = 918 - 919 -== 3.1 Principle of Distance Measurement == 920 - 921 -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. 922 - 923 -[[image:1654831757579-263.png]] 924 - 925 - 926 - 927 -== 3.2 Distance Measurement Characteristics == 928 - 929 -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: 930 - 931 -[[image:1654831774373-275.png]] 932 - 933 - 934 -①Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable. 935 - 936 -②Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m. 937 - 938 -③Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m. 939 - 940 - 941 -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: 942 - 943 - 944 -[[image:1654831797521-720.png]] 945 - 946 - 947 -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. 948 - 949 -[[image:1654831810009-716.png]] 950 - 951 - 952 -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. 953 - 954 - 955 - 956 -== 3.3 Notice of usage: == 957 - 958 -Possible invalid /wrong reading for LiDAR ToF tech: 959 - 960 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings. 961 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong. 962 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe. 963 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window. 964 - 965 - 966 - 967 967 = 4. Configure LLDS12 via AT Command or LoRaWAN Downlink = 968 968 969 969 ((( ... ... @@ -1091,6 +1091,7 @@ 1091 1091 * Reply to the confirmation package: 26 01 1092 1092 * Reply to non-confirmed packet: 26 00 1093 1093 1043 + 1094 1094 Device will send an uplink after got this downlink command. With below payload: 1095 1095 1096 1096 Configures info payload: ... ... @@ -1343,6 +1343,7 @@ 1343 1343 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band 1344 1344 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band 1345 1345 1296 + 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 1311 + 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.
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