Last modified by Mengting Qiu on 2024/03/07 08:41
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edited by Xiaoling
on 2022/06/10 17:04
To version < 146.1 >
edited by Xiaoling
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59 59  
60 60  
61 61  
62 -
63 63  == 1.3  Specification ==
64 64  
65 65  === 1.3.1  Rated environmental conditions ===
... ... @@ -74,16 +74,20 @@
74 74  
75 75  === 1.3.2  Effective measurement range Reference beam pattern ===
76 76  
77 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**[[image:image-20220610155021-2.png||height="440" width="1189"]]
76 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
78 78  
79 79  
80 80  
81 -**(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.[[image:image-20220610155021-3.png||height="437" width="1192"]]
80 +[[image:1654852253176-749.png]]
82 82  
83 -(% style="display:none" %) (%%)
84 84  
83 +**(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.**
85 85  
86 86  
86 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
87 +
88 +
89 +
87 87  == 1.5 ​ Applications ==
88 88  
89 89  * Horizontal distance measurement
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98 98  
99 99  
100 100  
101 -
102 102  == 1.6  Pin mapping and power on ==
103 103  
104 104  
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240 240  * If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.
241 241  
242 242  
245 +
243 243  === 2.3.3  Interrupt Pin ===
244 244  
245 245  This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.
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251 251  0x01: Interrupt Uplink Packet.
252 252  
253 253  
257 +
254 254  === 2.3.4  DS18B20 Temperature sensor ===
255 255  
256 256  This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
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534 534  
535 535  
536 536  
537 -
538 538  === 2.6.4  AU915-928(AU915) ===
539 539  
540 540  (((
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691 691  
692 692  
693 693  
694 -
695 695  === 2.6.6  KR920-923 (KR920) ===
696 696  
697 697  (((
... ... @@ -764,7 +764,6 @@
764 764  
765 765  
766 766  
767 -
768 768  === 2.6.7  IN865-867 (IN865) ===
769 769  
770 770  (((
... ... @@ -801,18 +801,22 @@
801 801  
802 802  
803 803  
804 -
805 805  == 2.7  LED Indicator ==
806 806  
807 -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.
808 808  
809 -* 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.
810 810  * Blink once when device transmit a packet.
811 811  
815 +
816 +
812 812  == 2.8  ​Firmware Change Log ==
813 813  
814 814  
815 -**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/]]
816 816  
817 817  
818 818  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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819 819  
820 820  
821 821  
822 -= 3.  LiDAR ToF Measurement =
827 +== 2.9  Mechanical ==
823 823  
824 -== 3.1 Principle of Distance Measurement ==
825 825  
826 -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]]
827 827  
828 -[[image:1654831757579-263.png]]
832 +[[image:image-20220610172003-2.png]]
829 829  
830 830  
835 +== 2.10  Battery Analysis  ==
831 831  
832 -== 3.2 Distance Measurement Characteristics ==
837 +=== 2.10.1  Battery Type ===
833 833  
834 -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.
835 835  
836 -[[image:1654831774373-275.png]]
837 837  
842 +The battery related documents as below:
838 838  
839 -(((
840 -(% 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]],
841 841  )))
842 -
843 -(((
844 -(% 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]],
845 845  )))
846 -
847 -(((
848 -(% 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]]
849 849  )))
850 850  
854 + [[image:image-20220610172400-3.png]]
851 851  
852 -(((
853 -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:
854 -)))
855 855  
856 856  
857 -[[image:1654831797521-720.png]]
858 +=== 2.10.2  Replace the battery ===
858 858  
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 +)))
859 859  
860 860  (((
861 -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 +
862 862  )))
863 863  
864 -[[image:1654831810009-716.png]]
865 -
866 -
867 867  (((
868 -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)
869 869  )))
870 870  
871 871  
872 872  
873 -== 3.3 Notice of usage: ==
874 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
874 874  
875 -Possible invalid /wrong reading for LiDAR ToF tech:
876 -
877 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
878 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
879 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
880 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
881 -
882 -= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
883 -
884 884  (((
885 885  (((
886 886  Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
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