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From version < 140.2 >
edited by Xiaoling
on 2022/06/10 17:11
To version < 145.1 >
edited by Xiaoling
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58 58  * 4000mAh or 8500mAh Battery for long term use
59 59  
60 60  
61 +
61 61  == 1.3  Specification ==
62 62  
63 63  === 1.3.1  Rated environmental conditions ===
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82 82  **(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
83 83  
84 84  
85 -[[image:1654852175653-550.png]]
86 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
86 86  
87 87  
88 -(% style="display:none" %) ** **
89 89  
90 -
91 -
92 92  == 1.5 ​ Applications ==
93 93  
94 94  * Horizontal distance measurement
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102 102  * Bottom water level monitoring
103 103  
104 104  
103 +
105 105  == 1.6  Pin mapping and power on ==
106 106  
107 107  
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539 539  
540 540  
541 541  
542 -
543 543  === 2.6.4  AU915-928(AU915) ===
544 544  
545 545  (((
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696 696  
697 697  
698 698  
699 -
700 700  === 2.6.6  KR920-923 (KR920) ===
701 701  
702 702  (((
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769 769  
770 770  
771 771  
772 -
773 773  === 2.6.7  IN865-867 (IN865) ===
774 774  
775 775  (((
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806 806  
807 807  
808 808  
809 -
810 810  == 2.7  LED Indicator ==
811 811  
812 -The LLDS12 has an internal LED which is to show the status of different state.
807 +The LDDS75 has an internal LED which is to show the status of different state.
813 813  
814 -* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
809 +
810 +* Blink once when device power on.
811 +* The device detects the sensor and flashes 5 times.
812 +* Solid ON for 5 seconds once device successful Join the network.
815 815  * Blink once when device transmit a packet.
816 816  
815 +
816 +
817 817  == 2.8  ​Firmware Change Log ==
818 818  
819 819  
820 -**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/]]
820 +**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
821 821  
822 822  
823 823  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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824 824  
825 825  
826 826  
827 -= 3.  LiDAR ToF Measurement =
827 +== 2.9  Mechanical ==
828 828  
829 -== 3.1 Principle of Distance Measurement ==
830 830  
831 -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.
830 +[[image:image-20220610172003-1.png]]
832 832  
833 -[[image:1654831757579-263.png]]
832 +[[image:image-20220610172003-2.png]]
834 834  
835 835  
835 +== 2.10  Battery Analysis  ==
836 836  
837 -== 3.2 Distance Measurement Characteristics ==
837 +=== 2.10.1  Battery Type ===
838 838  
839 -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:
839 +The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
840 840  
841 -[[image:1654831774373-275.png]]
842 842  
842 +The battery related documents as below:
843 843  
844 -(((
845 -(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
844 +* (((
845 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
846 846  )))
847 -
848 -(((
849 -(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
847 +* (((
848 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
850 850  )))
851 -
852 -(((
853 -(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
850 +* (((
851 +[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
854 854  )))
855 855  
854 + [[image:image-20220610172400-3.png]]
856 856  
857 -(((
858 -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:
859 -)))
860 860  
861 861  
862 -[[image:1654831797521-720.png]]
858 +=== 2.10.2  Replace the battery ===
863 863  
860 +(((
861 +You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
862 +)))
864 864  
865 865  (((
866 -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.
865 +
867 867  )))
868 868  
869 -[[image:1654831810009-716.png]]
870 -
871 -
872 872  (((
873 -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.
869 +The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
874 874  )))
875 875  
876 876  
877 877  
878 -== 3.3 Notice of usage: ==
874 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
879 879  
880 -Possible invalid /wrong reading for LiDAR ToF tech:
881 -
882 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
883 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
884 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
885 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
886 -
887 -= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
888 -
889 889  (((
890 890  (((
891 891  Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
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