DALI MD16U Human Body Temperature Measurement Module User Manual
- June 5, 2024
- DALI
Table of Contents
User Manual
MD16U Human Body Temperature
Measurement Module
Rev. 1.0
Zhejiang DALI Technology Co., Ltd.
MD16U thermal imaging module user manual
Product Introduction
The MD16U human body temperature measurement thermal imaging module is
developed by DALI manufactured uncooled microbolometer detectors. MD16U
outputs data with a resolution of 120×322 in UVC mode. The pseudo-color image
and the temperature image are spliced up and down and output at the same time.
The upper 120×160 is the pseudo-color image, the lower 120×160 is the
temperature data, and the last 2 lines of information output other
information.
The module supplies power through the USB interface, communicates control and
data output in UVC mode, and is easy to integrate with other application
systems.
MD16U module can be connected to a computer for independent application and is
also suitable for integration with other human body temperature measurement
and screening equipment: temperature measurement flat panel, temperature
measurement gate, temperature measurement security gate, temperature
measurement attendance machine, temperature measurement access control
intercom and other equipment
Picture .1：MD16T Module appearance
MD16U Features and Advantages：
- Integrated mini black body, high-temperature measurement accuracy, stable performance, and small influence of working environment temperature.
- Full-frame human body temperature measurement: Each frame of the image provides 160×120 temperature point data, suitable for various applications.
- UVC output to realize drive-free development
- Small size, convenient installation, universal single USB cable input, and output
- Flexible application: users can perform personalized algorithm processing such as back-end image stretching and pseudo-color rendering.
Precautions for module use:：
- Use in strict accordance with the specified use conditions of the product, and the module needs to be used in an indoor no wind scene.
- When the system is used in integration, it is necessary to strengthen the heat dissipation and ensure uniform and stable temperature around the module and be isolated from other cold/heat sources to avoid severe fluctuations in ambient temperature.
- Take care to protect the surface of the lens to avoid scratches and oil stains from hard objects.
- The module should not look directly at high-temperature targets such as the sun to prevent high-temperature burns to the detector.
Technical Specifications
The detailed technical parameters of MD16U are described below：
Table 1：Technical Parameters
| Detector Type | Uncooled microbolometer array sensor |
|---|---|
| Resolution | 160×120 |
| Pixel Pitch | 17um |
| Pixel Pitch | 17um |
| NEED | ≤60mK (F/1,300K,60Hz) |
| Frame Rate | ≤12Hz（image and temp output at the same time） |
≤14Hz（single image or temperature）
Image Calibration| Single point, two points, dead point replacement, etc.,
dynamic dead point correction, automatic gain, and false color (can be turned
off) are completed before leaving the factory
Output Interface| UVC
Control Interface| UVC
Temperature Range| 30℃～40℃
Temperature Accuracy| Inbuilt black body, ± 0.3°C (ambient temperature
20°C~30°C)/±0.5°C (ambient temperature 10°C~40°C)
Temperature Measurement Range| 0.5m
Distance Calibration| Support
Human Body Temperature Calibration| Support surface temperature / human body
internal temperature
Temperature Data Output| 120×322（Image and temperature stitching up and down）
120×162(Gray value or temperature data)
Working voltage| DC 4.4V～5.5V
Power consumption| 0.8W(room temperature steady state), peak 2.5W
Working Temp| 10℃～40℃
Storage Temp| -40℃～60℃
Dimension| 70mm×40mm×53mm
Install port| 2 M2 threaded holes on the bottom, 1 1/4′-20UNC threaded hole, 4
M2 threaded holes on the back
Lens| Athermalized fixed focus infrared lens
Focus| f3.85mm/F1.0
FOX| 29.7°×38.9°
PC Software| Provide Windows version PC software, can view images, temperature
measurement, etc.
SDK| Provide SDK, including data receiving, sending, parsing, output mode
switching, filtering algorithm switch, automatic gain
switch, pseudo-color calling, and distance correction interface
---|---
Mechanical Parameters
The dimensions of the module are shown in Picture 2(unit： mm)
Picture
2：Module dimension
Electrical Parameters
The module output interface is a USB Type-A male data cable, which works in
USB2.0 mode.
Power requirements input range 4.4V ~ 5.5V, currently greater than 500mA, more
than 1A is recommended
Software protocol
The module is a UVC slave device with a VC interface and a VS interface
inside.
The VC interface is used for module control, and the VS interface is used for
image and temperature data output.
Use the “contrast” adjustment command in the VC interface to issue control
commands, upload module response information, and control the basic
composition and format of transmission data packets as shown in Table 3.
Table 3：Packet format
| No. | Definition | Bytes | Format |
|---|---|---|---|
| 1 | start byte | 1 | Fixed number：0x6e |
| 2 | status code | 1 | 0x00 |
| 3 | reserved bit | 1 | 0x00 |
| 4 | script | 1 | As shown in Table 4 |
| 5 | Data length (high order) | 1 | Indicates the length of number 9 data, see |
Table 4 “Data Length” column
6| Data length (low order)| 1
7| CRC1 (high order)| 1| check code
8| CRC1 (low order)| 1
9| data| changeable| Actual data sent in little-endian mode, with variable
length
10| CRC2 (high order)| 1| check code
11| CRC2 (low order)| 1
CRC1 check: CCITT-16 checksum is used, CRC-CCITT （ 0xFFFF ）， that is CRC-16
/CCITT-FALSE
a) The check operation is performed on the four parts of “No. 1”-“No. 6”.
b) The check is formed at the backend and is checked at the module side. If
the check fails, it needs to be retransmitted.
CRC2 check: CCITT-16 checksum is used, CRC-CCITT （ 0xFFFF ）， that is CRC-16
/CCITT-FALSE。
a) The check operation is performed on the six parts of “No. 1” – “No. 9”.
b) The check is formed at the backend and is checked at the module side. If
the check fails, it needs to be retransmitted.
The table used for CRC1 and CRC2 checks is shown in Appendix 1
Table 4：Command
Code| D i r e action| D a t a|
**Length| D e s c r i p t i o
n**
---|---|---|---|---
0x04| Serial down| 0x00:Turn on single-point calibration (manual calibration)
Example：6e 00 00 04 00 01 1d 4a 00 00 00| 1| Manual single-point calibration
0x2a| Serial down| Auto Gain and Pseudo Color On
Example：6e 00 00 2a 00 02 b0 ee 02 00 66 62 Auto Gain and Pseudo Color Off
Example：6e 00 00 2a 00 02 b0 ee 02 01 76 43| 2| Automatic gain and pseudo-
color switch
Serial down| The module temperature measurement data enables the human body
compensation mode Example：6e 00 00 2a 00 02 b0 ee 0c 00 45 6d The module
temperature measurement data closes the human body compensation mode
Example：6e 00 00 2a 00 02 b0 ee 0c 01 55 4C| 2| On/off state, it will take
effect after the next shutter release, and it will be automatically saved in
the
module
0x84| Serial down| Parameter 1～2: The number of data packets of the upgrade
file
Example：6e 00 00 84 00 02 16 73 05 00 ff f5| 2| Notify the module to upgrade,
and inform the number of data packages, Note 2
| Serial up| Parameter 1～2: Request the packet number of the next data packet,
the packet number starts from 0
Example：6e 00 00 84 00 02 16 73 00 00 00 00| 2| The module responds with 0x00
---|---|---|---|---
Serial down| Parameters 1 to 4: file length (sent in little-endian mode)
Parameters 5 to 6: CRC of the entire file (sent in little-endian mode)
Parameter 7～18: The modification time of the file (year, month, day, hour,
minute) Parameters 19~30: The version number of the file (included in the file
name)
Parameter 31~50: reserved parameter, default 00.
Example：6e 00 00 84 00 32 20 20 04 e7 00 00 dc 35 32 30 32 31 30 38 32 34 31
32 31 39 5a 32 30 30 30 38 32 34 31 32 31 39 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 40 1f| 50| Firmware file length, verification, file
modification time, version number, and other information.
Serial up| Parameter 1~2: Request the packet number of the next data packet,
the packet number starts from 1
Example：6e 00 00 84 00 02 16 73 01 00 33 31| 2| The module responds to the
packet number 0x01; the next step starts to send the data packet of the file.
Serial down| Parameter 1~2: the package number of the current package,
starting from 1 Parameter 3~4: effective data length
Parameter 5～: Valid data| ≤12800| data pack
0x88| Serial down| switch to a grayscale image
Example：6e 00 00 88 00 01 53 71 00 00 00 00 switch to temperature image
Example：6e 00 00 88 00 01 53 71 01 10 21 00| 1| switch to grayscale image and
temperature image
0x8a| Serial down| 0x00:Module reset restart
Example：6e 00 00 8a 00 01 3d 11 00 00 00| 1| Module restart
0xa4| Serial down| Parameter 1：02 Parameter:2～5：distance, Unit is centimeter,
float type
Example：6e 00 00 a4 00 05 e0 52 02 00 00 a0 41 01 18| 5| The example is
20.0cm, the float value is 41 a0 00 00,sent in little
| | | | endian mode
---|---|---|---|---
Note 1: The command packet is transmitted by using the “contrast”
adjustment command of UVC. Only 2 bytes must be transmitted at a time.
Therefore, when the length of the command packet (number of bytes) is not an
even number, it needs to be filled with zeros at the end. Special attention
should be paid to the high and low bits of the sending command. For example,
the length (number of bytes) of the first 6e 00 00 04 00 01 1d 4a 00 00 00 is
odd, and 0 should be added to 6e 00 00 04 00 01 1d 4a 00 00 00 00 , the
module needs to receive the information in this order. If it is sent from a
computer, the computer transmits the problem of size end and the content that
needs to be sent on the computer is as follows
0x6e 0x00;
0x00 0x04;
0x00 0x01;
0x1d 0x4a;
0x00 0x00;
0x00 0x00;
Note 2; Firmware Upgrade Instructions
The firmware data is sent to upgrade through UVC instruction, and 0x84 is
used.
The process is:
A. Send the 0x84 downlink command for the first time, notify the module to
enter the firmware upgrade state, and inform the firmware of the number of
data packets (Byte), the module responds to the 0x84 command and returns
0x00, indicating that it is ready;
B. Send the 0x84 downlink command for the second time to notify the module of
the total length, check the code, modification time, and version number of the
firmware file to be upgraded. The module responds with 0x01, indicating that
the packet number of the first data packet is requested, starting from 1;
C. Next, divide the firmware size into multiple packages by 12796Byte each
time, each package is accompanied by the package number and length of the
current package, and send all firmware data in turn through the 0x84 command.
Note that CRC2 needs to be calculated correctly, and the modulo Each time the
group receives a 0x84 firmware data packet, it will return a 0x84 response
command to notify the upper computer that the reception is completed and
request the packet number of the next data packet. If there is no 0x84
response, the current packet needs to be resent.
The last data packet may be less than 12800Byte in length, and it is sent
according to the actual data length.
UVC Output
The module is a UVC slave device, and the VS interface is used for data
transmission. When outputting data, the format is YUYV, and the size of each
pixel is 2Byte.
The default state of the module is to output a pseudo-color image and
temperature image at the same time, and the output resolution is 120×322.
Lines 1 to 160 are pseudo-color images, lines 161 to 320 are temperature data,
and the last two lines are status information.
The module can also be switched to output only pseudo-color image data, or
only output temperature data, the output resolution is 120×162, the first row
to the 160th row is pseudo-color image data or temperature data, and the last
two rows are status information.
When acquiring data, the data is first read in the YUYV method, the pseudo-
color image data is directly converted to RGB output, and the temperature data
is converted to grayscale. The conversion relationship between the temperature
measurement value Tc (°C) of the detection target and the grayscale value Vc
(grayscale) of the temperature data is Tc= Vc/10–273;
In the output data, the last two lines are used to display the status information, and the information of each part is shown in Table 5. For the information of the two lines of status bits, the starting position is at the position of 0 points of the last two lines, after outputting the data of the previous array, the next 12Byte is the detector type. That is, Table 5 is output in order from the 0-point position of the last two lines.
Table 5: Information Format
| Name | No(Byte) | Remark |
|---|---|---|
| Module Info | Detector type | 12 |
1st byte ~ 12th byte on line 321
Detector number| 12| Example： P2235A
12th byte~24th byte
Firmware version number| 12| Example： C20210081556 25th byte~36th byte
bootloader version| 12| 37th byte~48th byte
Module model| 12| Example： MD16U
49th byte~60th byte
reserved| 12| 61st byte~72th byte
Shutter grayscale| 2| 91st byte~92th byte
TOUT gray value| 2| 93rd byte~94th byte
Center point information| 12| Row coordinate (UINT16) starts at byte 105
column coordinates (UINT16) temperature (float) Grayscale (UINT32)
Highest point information| 12| Row coordinate (UINT16) starts at byte 117
column coordinates (UINT16)
| | temperature (float)
Grayscale (UINT32)
---|---|---
Lowest point information| 12| Row coordinate (UINT16) starts at byte 129
column coordinates (UINT16) temperature (float)
Grayscale (UINT32)
any point information| 12| Row coordinate (UINT16) starts at byte 141
column coordinates (UINT16) temperature (float)
Grayscale (UINT32)
Note 1: TOUT gray value, shutter gray value, center point information,
highest point information, and lowest point information are all in little-
endian mode.
Note 2: The conversion relationship between the internal temperature of
the detector Ts (°C) and the module TOUT gray value Vs (gray) is:
Ts = 190.64 – 0.02164 × Vs
(The following page is Appendix 1)
Appendix 1：
CRC checklist
I t e m| CRC v a l u e| I t
e m| CRC v a l u e| I t e m|
CRC v a l u e| I t e m| CRC
v a l u e
---|---|---|---|---|---|---|---
0x00| 0x0000| 0x40| 0x48c4| 0x80| 0x9188| 0xc0| 0xd94c
0x01| 0x1021| 0x41| 0x58e5| 0x81| 0x81a9| 0xc1| 0xc96d
0x02| 0x2042| 0x42| 0x6886| 0x82| 0xb1ca| 0xc2| 0xf90e
0x03| 0x3063| 0x43| 0x78a7| 0x83| 0xa1eb| 0xc3| 0xe92f
0x04| 0x4084| 0x44| 0x0840| 0x84| 0xd10c| 0xc4| 0x99c8
0x05| 0x50a5| 0x45| 0x1861| 0x85| 0xc12d| 0xc5| 0x89e9
0x06| 0x60c6| 0x46| 0x2802| 0x86| 0xf14e| 0xc6| 0xb98a
0x07| 0x70e7| 0x47| 0x3823| 0x87| 0xe16f| 0xc7| 0xa9ab
0x08| 0x8108| 0x48| 0xc9cc| 0x88| 0x1080| 0xc8| 0x5844
0x09| 0x9129| 0x49| 0xd9ed| 0x89| 0x00a1| 0xc9| 0x4865
0x0a| 0xa14a| 0x4a| 0xe98e| 0x8a| 0x30c2| 0xca| 0x7806
0x0b| 0xb16b| 0x4b| 0xf9af| 0x8b| 0x20e3| 0xcb| 0x6827
0x0c| 0xc18c| 0x4c| 0x8948| 0x8c| 0x5004| 0xcc| 0x18c0
0x0d| 0xd1ad| 0x4d| 0x9969| 0x8d| 0x4025| 0xcd| 0x08e1
0x0e| 0xe1ce| 0x4e| 0xa90a| 0x8e| 0x7046| 0xce| 0x3882
0x0f| 0xf1ef| 0x4f| 0xb92b| 0x8f| 0x6067| 0xcf| 0x28a3
0x10| 0x1231| 0x50| 0x5af5| 0x90| 0x83b9| 0xd0| 0xcb7d
0x11| 0x0210| 0x51| 0x4ad4| 0x91| 0x9398| 0xd1| 0xdb5c
0x12| 0x3273| 0x52| 0x7ab7| 0x92| 0xa3fb| 0xd2| 0xeb3f
0x13| 0x2252| 0x53| 0x6a96| 0x93| 0xb3da| 0xd3| 0xfb1e
0x14| 0x52b5| 0x54| 0x1a71| 0x94| 0xc33d| 0xd4| 0x8bf9
0x15| 0x4294| 0x55| 0x0a50| 0x95| 0xd31c| 0xd5| 0x9bd8
0x16| 0x72f7| 0x56| 0x3a33| 0x96| 0xe37f| 0xd6| 0xabbb
0x17| 0x62d6| 0x57| 0x2a12| 0x97| 0xf35e| 0xd7| 0xbb9a
0x18| 0x9339| 0x58| 0xdbfd| 0x98| 0x02b1| 0xd8| 0x4a75
0x19| 0x8318| 0x59| 0xcbdc| 0x99| 0x1290| 0xd9| 0x5a54
0x1a| 0xb37b| 0x5a| 0xfbbf| 0x9a| 0x22f3| 0xda| 0x6a37
0x1b| 0xa35a| 0x5b| 0xeb9e| 0x9b| 0x32d2| 0xdb| 0x7a16
0x1c| 0xd3bd| 0x5c| 0x9b79| 0x9c| 0x4235| 0xdc| 0x0af1
0x1d| 0xc39c| 0x5d| 0x8b58| 0x9d| 0x5214| 0xdd| 0x1ad0
0x1e| 0xf3ff| 0x5e| 0xbb3b| 0x9e| 0x6277| 0xde| 0x2ab3
0x1f| 0xe3de| 0x5f| 0xab1a| 0x9f| 0x7256| 0xdf| 0x3a92
0x20| 0x2462| 0x60| 0x6ca6| 0xa0| 0xb5ea| 0xe0| 0xfd2e
0x21| 0x3443| 0x61| 0x7c87| 0xa1| 0xa5cb| 0xe1| 0xed0f
0x22| 0x0420| 0x62| 0x4ce4| 0xa2| 0x95a8| 0xe2| 0xdd6c
0x23| 0x1401| 0x63| 0x5cc5| 0xa3| 0x8589| 0xe3| 0xcd4d
0x24| 0x64e6| 0x64| 0x2c22| 0xa4| 0xf56e| 0xe4| 0xbdaa
---|---|---|---|---|---|---|---
0x25| 0x74c7| 0x65| 0x3c03| 0xa5| 0xe54f| 0xe5| 0xad8b
0x26| 0x44a4| 0x66| 0x0c60| 0xa6| 0xd52c| 0xe6| 0x9de8
0x27| 0x5485| 0x67| 0x1c41| 0xa7| 0xc50d| 0xe7| 0x8dc9
0x28| 0xa56a| 0x68| 0xedae| 0xa8| 0x34e2| 0xe8| 0x7c26
0x29| 0xb54b| 0x69| 0xfd8f| 0xa9| 0x24c3| 0xe9| 0x6c07
0x2a| 0x8528| 0x6a| 0xcdec| 0xaa| 0x14a0| 0xea| 0x5c64
0x2b| 0x9509| 0x6b| 0xddcd| 0xab| 0x0481| 0xeb| 0x4c45
0x2c| 0xe5ee| 0x6c| 0xad2a| 0xac| 0x7466| 0xec| 0x3ca2
0x2d| 0xf5cf| 0x6d| 0xbd0b| 0xad| 0x6447| 0xed| 0x2c83
0x2e| 0xc5ac| 0x6e| 0x8d68| 0xae| 0x5424| 0xee| 0x1ce0
0x2f| 0xd58d| 0x6f| 0x9d49| 0xaf| 0x4405| 0xef| 0x0cc1
0x30| 0x3653| 0x70| 0x7e97| 0xb0| 0xa7db| 0xf0| 0xef1f
0x31| 0x2672| 0x71| 0x6eb6| 0xb1| 0xb7fa| 0xf1| 0xff3e
0x32| 0x1611| 0x72| 0x5ed5| 0xb2| 0x8799| 0xf2| 0xcf5d
0x33| 0x0630| 0x73| 0x4ef4| 0xb3| 0x97b8| 0xf3| 0xdf7c
0x34| 0x76d7| 0x74| 0x3e13| 0xb4| 0xe75f| 0xf4| 0xaf9b
0x35| 0x66f6| 0x75| 0x2e32| 0xb5| 0xf77e| 0xf5| 0xbfba
0x36| 0x5695| 0x76| 0x1e51| 0xb6| 0xc71d| 0xf6| 0x8fd9
0x37| 0x46b4| 0x77| 0x0e70| 0xb7| 0xd73c| 0xf7| 0x9ff8
0x38| 0xb75b| 0x78| 0xff9f| 0xb8| 0x26d3| 0xf8| 0x6e17
0x39| 0xa77a| 0x79| 0xefbe| 0xb9| 0x36f2| 0xf9| 0x7e36
0x3a| 0x9719| 0x7a| 0xdfdd| 0xba| 0x0691| 0xfa| 0x4e55
0x3b| 0x8738| 0x7b| 0xcffc| 0xbb| 0x16b0| 0xfb| 0x5e74
0x3c| 0xf7df| 0x7c| 0xbf1b| 0xbc| 0x6657| 0xfc| 0x2e93
0x3d| 0xe7fe| 0x7d| 0xaf3a| 0xbd| 0x7676| 0xfd| 0x3eb2
0x3e| 0xd79d| 0x7e| 0x9f59| 0xbe| 0x4615| 0xfe| 0x0ed1
0x3f| 0xc7bc| 0x7f| 0x8f78| 0xbf| 0x5634| 0xff| 0x1ef0
The initial value of CRC is 0xFFFF.
Note: CRC does not directly check the table in Appendix 1, but is
calculated according to the algorithm. The table in Appendix 1 is the table
called during the calculation process. This table is used in the CRC algorithm
source code.
The CRC check algorithm of the module is CRC-CCITT (0xFFFF), namely CRC-16
/CCITT-FALS.
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