HESAI DM100 Drone Mounted Remote Methane Leak Detector User Manual

HESAI DM100 Drone Mounted Remote Methane Leak Detector

Notice

Please read this manual carefully before using the equipment.

• CAUTION
  To avoid violating the warranty and to minimize the chances of getting electrically shocked, please do not disassemble the device on your own accord. The device must not be tampered with and must not be changed in any way. There are no user-serviceable parts inside the device. For repairs and maintenance inquiries, please contact an authorized Hesai Technologies service personnel.

• DISCLAIMER
  The information contained within this user’s manual and the functions offered is intended to provide information about products. All reasonable efforts have been made to ensure the accuracy of the information. However, Hesai cannot be held responsible for any errors. Hesai does not warrant the accuracy and reserves the right to make changes to the catalog and its functions at any time without notice.

Safety Notice

Prior to using this product, please read the safety notices carefully to ensure the safety and to avoid any improper usage.

• Warning
  Be sure to observe the following points:
  Avoid direct eye exposure. The lasers may harm your eyes.
  Do not point the lasers at people when the product is powered on.
  Do not allow children to handle the product.
  The blue working light will turn on when there is an infrared laser emission.
  Infrared detection lasers and green indicator lasers have outlet labels next to them, and Class 3R warning labels are attached to the side of the device.
  CAUTION
  Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

• Laser Safety
  Infrared Measurement Laser:
  Class 1, Wavelength: 1.65 μm, <10 mW
  Green Alignment Laser: Class 3R, Wavelength: 520 nm, <5 mW
  Figure 1. Laser Safety Notice
  

The device satisfies the requirements of:

• IEC/EN 60825-1: 2014;
• Complies with 21 CFR 1040.10 and 1040.11 except for conformance with IEC 60825-1 Ed.3., as described in Laser Notice No.56, dated May 8, 2019.
  
  VISIBLE AND INVISIBLE LASER RADIATION AVOID DIRECT EYE EXPOSURE CLASS 3R LASER PRODUCT
  DM100 Green Laser
  Wavelength: 520 nm (rated)
  Beam Divergence: ~2.4 mrad
  Operation Mode: 0.1s to 10s (adjustable)
  Maximum Average Power: <5 mW| Infrared Laser
  Wavelength: 1.65 μm (rated)
  Beam Divergence: ~3 mrad
  Operation Mode: pulsed
  Maximum Average Power: <10 mW
  ---|---

Introduction

Hesai Drone-mounted Remote Methane Leak Detector is an ultralight and highly sensitive module that utilizes an infrared laser to remotely detect methane leaks. It can be mounted on the drones, vehicles, and ships for applications such as pipeline survey, residential area detection, etc.

The detector measures the methane concentration by emitting an infrared laser and receiving the laser reflection.
The reading is expressed by a methane column density (ppm*m). It is the integral of the methane concentration (ppm) and the distance (m) on the optical path.

• Figure 2. Light Instructions
  

Specifications

Table 1. Main Specifications

(TDLAS)
Sensitivity| 5 (Actual) ppmm
Detection Range (CH4)| 0~99999 ppmm
Measurement Accuracy| ±10% (100~50000 ppmm)
Response Time| 10 ms (configurable)
Detection Distance| 160 m (@75% reflectivity) (Actual distance may vary due to background type and conditions)
Weight| < 600 g
Size| 70 mm87 mm*120 mm
Operating Voltage| DC 7~12 V
---|---
Rated Current| <1 A
0.3 A (typical value) under 8 V power supply
Data Output| Methane concentration, light intensity, temperature, etc.
Laser Classes| Infrared Measurement Laser: Class 1,
Wavelength: 1.65 μm, <10 mW
Green Alignment Laser: Class 3R,
Wavelength: 520 nm, <5 mW
Operating Temperature| -20℃~+45℃
Enclosure Level| IP54
Beam Size| Infrared light divergence angle: 3 mrad (6 cm at 20 m)

• Specifications are subject to change without notice

Installation Guide

Installation Notice

Prior to installing the detector, please read the notes carefully to ensure safe and appropriate usage:

1. Supply the detector as required (DC 7~12 V).
2. Provide good heat dissipation to the laser.
3. Pay attention to static electricity. Please release the body static electricity or wear antistatic bracelet before the installation.
4. Do not weld/replace any component unless it is recognized by Hesai.
5. Do not unplug the laser fiber. Do not bend the fiber even at a small angle.
6. Do not attempt to remove any circuit boards unless it is recognized by Hesai.
7. Do not use the PCB of detector A on detector B.
8. Do not disassemble or repair the device on your own accord. For repairs and maintenance inquiries, please contact an authorized Hesai Technologies service personnel.
9. It is recommended that the length of the external cable should not exceed 3m.

Mechanical Installation

There are two mechanical mounting holes on the top of the detector for the horizontal installation, and four mechanical mounting holes at the back of the detector for the vertical installation. The mechanical drawing of the detector is shown below.

• Figure 3. Detector Mechanical Drawing
  

Interface Introduction

The interfaces are at the back of the detector. Descriptions of the interfaces are shown below.

• Figure 4. Detector Interfaces
  
  

Table 2. Detector Interfaces

UART Serial Port Data and Parameter Configuration

UART Serial Port Data Output

• Serial Port Configuration
  Baud Rate: 57600; Data: 8 bytes; Stop: 1 byte; Parity: None.

• Data Format
  After power-on, the detector will use around 3 seconds to complete the self- test. If there is an issue, the detector will repeat self-testing until the problem is solved. After booting up, the serial port will send out data in the following format:
  Table 3. Outputs Data Format
  

Header| Methane Concentration| Light Intensity| | Relevancy 1000| Environment Temperature| | | | SNR| Reserved Bytes| Version Number| Error Code| Checksum
---|---|---|---|---|---|---|---|---|---|---|---|---|---
| 5 bytes| 5 bytes| 5 bytes| 5 bytes| 5 bytes| 5 bytes| 5 bytes| 5 bytes| 3 bytes| 3 bytes| 3 bytes| 3 bytes|
$| 00318，| 02147，| 00735，| 00999，| 00036，| 00024，| -0078，| 00000，| 003，| 000，| 010，| 000| 3C

Table 4. Data Description

outputs
Environment Temperature| measured from PCB board thermistor
SNR| signal to noise ratio reference value
Version Number| used to record the software version number, e.g. 011
Data| Description
---|---
Error Code| 000 normal operation;
001 temperature control failure;
002 laser diode error;| 004 circuit board temperature exceeds -20~80℃;
008 laser case temperature exceeds -20~80 °C;
016 reference channel error.
Checksum| Starting character is ‘’, and the Checksum value is obtained by the data difference or operation between ‘$’ and’ ‘.
Checksum calculation example:unsigned char CalcChecksum(unsigned char* str, int len)
{
unsigned char cs;
int i;
cs = 0;
for (i=0; i<len; i++)
{
cs ^= str[i];
}
return cs;
}

• Error Code Proper Handling Method
  When the error message appears, try restarting the device. If error code 001, 004, or 008 appears, please try to restart the device after it is completely cooling down. If the error still exists, please contact Hesai for the technical support.

NOTE Do not try to repair the device on your own accord.

Parameter Configuration

Users can use the serial port debugging tool to configure parameters for the detector. The specific configuration parameters are as follows:

is only valid in configuration mode
Set measurement time| “SSPD,%f\r\n”| “AOK\r\n”| Default setting: 0.1 s. Options: 0.1 s~10 s
Set save power| “SD,Savepower\r\n”| “AOK\r\n”| –
Set wakeup| “SD,Wakeup\r\n”| “AOK\r\n”| –
Set SNR| “SSNR,%f\r\n”| “AOK\r\n”| Default setting: 2. Options: 0.1~10
Set light intensity threshold| “SITH,%d\r\n”| “AOK\r\n”| Default setting: 100，Options: 50~1000 (integer)
Get device information| “DSP\r\n”| “DeviceSN: %s\r\n LaserSN: %s\r\n SetTld: %x\r\n IS1651: %d\r\n SNRThreshX10: %d\r\n IntensityThresh: %d\r\n”| Example： “DeviceSN:HESAI194 LaserSN:ABCD1234
SetTld:825 IS1651:1
SNRThreshX10:10 IntensityThresh:100”
Set green alignment laser| “SGL,ON\r\n” “SGL,OFF\r\n”| “AOK\r\n”| Default setting: ON
Reset| “SF,1\r\n”| “AOK\r\n”| Restore system default setting
Exit| “—\r\n”| “END\r\n”| Enter test mode after exiting configuration mode

• After sending the configuration command, the system returns the value “AOK\r\n”; if the command is incorrect, it returns “ERR\r\n”. End a command with “\r\n”.

Appendix I Warranty and Maintenance

Warranty

During the warranty period, Hesai will provide free maintenance service when the device can’t operate due to the problem of software or hardware. But Hesai will not provide the service if the problem is caused by rule-breaking operations. Situations that break the warranty include but are not limited to the following:

1. Missing warranty document or effective purchase vouchers;
2. Did not use the instrument as per instructed;
3. Unauthorized modification, disassembly, or repair;
4. Intentional damages;
5. Stolen, lost or discarded device;
6. Damaged device due to use with unauthorized accessories and services;
7. Those damages caused by natural disasters, such as fire, lightning, flood, earthquake, etc

Maintenance

For maintenance requirement, please follow the following steps:

1. Report the problem to Hesai for the preliminary problem diagnosis.
2. Return the product to Hesai.
3. Hesai conducts the maintenance test report, calculates maintenance fee (if any), and provides the maintenance agreement.
4. Sign the maintenance agreement and pay the maintenance fee if needed.
5. Receive the repaired instrument and finish the delivery inspection.

Normal Maintenance Time (after receiving the product): 7 days. The specific maintenance time shall be determined according to the actual situation.

Appendix II EC-Declaration of Conformity

Manufacturer Name: Hesai Photonics Technology Co., Ltd.
Manufacturer Address: Room J385, Building 6, No. 1288 Yecheng Rd., Jiading District, Shanghai City, China
Tel: 00+86-21-31588240;
Fax: 00+86-21-31588240;
E-mail: lijinv@hesaitech.com

Appendix III FCC Statement

FCCID: 2ASO2DM100

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Please note that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Customer Support

HESAI WeChat

Hesai Technology Co., Ltd.
Phone: 400-805-1233
Website: www.hesaitech.com
Address: Building L2, Hongqiao World Centre, Shanghai, China
Business Email: info@hesaitech.com
Service Email: service@hesaitech.com

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>