Wireless Bio-Radar Sensor for Respiration and Sleep Monitoring LST24BDA
This radar is a self-contained space sensing sensor, which is a module composed of RF antenna, radar chip and high-speed main frequency MCU, relying on the stable and flexible algorithmic architecture core, to solve the user’s needs for detection of various scenarios, and it can be equipped with a host or host computer to flexibly output the detection status and data, and satisfy a few groups of GPIOs for user customization and development.
Operating Principle
The radar transmits 24G band millimeter wave signal, the measured target reflects electromagnetic wave signal, demodulates the transmitted signal, and then obtains echo demodulated signal data through amplification, filtering, ADC and other processing. The amplitude, frequency and phase of echo signal are solved in MCU unit, and finally the measurement of target parameters (breathing, motion, micro motion, и т. д.) and scene evaluation are realized.
Precautions for Hardware Design
The rated power supply voltage of the radar shall meet 4.9 – 6V..
Under normal working conditions, the rated current requires an input of mor e than 200mA. Power supply design, power ripple shall be ≤ 100mV.
Description of Functions
| Function Points | Time of State Change/Explanation |
| DP1：somebody/nobody | nobody to somebody, report within 0.5s somebody to nobody, output “No” in 1to
2mins |
| DP2：stationary/moving | shift between stationary and moving states, report within 0.5s |
| DP3：personnel approaching/leaving/no directional movement |
output every 2s |
| DP4：parameter of body motion amplitude from 0 – 100 | output every 5s refer to（section 6.2) |
| DP5：sensitivity gear from 0 – 9 | 10 gears for default scenario |
| DP7：scenario（bed,bathroom,hotel,bedr oom,office,default） |
different scenarios according to size of coverage |
| DP8：confirm reminder of false alarm of nobody | |
| DP9：switch for falling detection | default:shut down, only effective when turned on |
| DP10：in bed/out of bed | output state in 3s |
| DP11：Times of in bed/out of bed | summarize times of in bed/out of bed in a day |
| DP12: sleep assessment | three states, output every 10 min |
| DP13：awake time duration | |
| DP14：light sleep time duration | |
| DP15：deep sleep time duration | |
| DP16：respiratory rate | test normal respiratory rate |
| DP17：respiratory rate detecting signal | output states like distance, range and etc |
| DP18：sleep quality score（optional,
users may stipulate depending on will） |
score every day’s sleep quality |
Product function introduction
Product Features
▶Static Body Detection
▶Vital Signs Detection
▶24GHz millimeter wave radar sensor
▶Based on Doppler radar technology, realize the radar scanning area people sensing function.
▶Realize the synchronous sensing function of moving and stationary people.
▶Maximum distance for human sleep quality monitoring: ≤2.75m
▶Maximum distance of human respiration frequency detection: ≤1.5m
▶Antenna beam width: R24BSM1AU: Horizontal 40 ° / Vertical 40 ° fan-shaped beams
▶With scene recognition ability, recognizing occupied/unoccupied and personnel activity state, output body movement.
▶Unaffected by temperature, humidity, noise, airflow, dust, light, и т. д., suitable for harsh environments.
▶Small output power, no harm to human body for long time irradiation.
▶Unoccupied to occupied detection time: within 0.5 seconds.
▶Detection time from occupied to unoccupied: больше, чем 1 minute
Main functions include
A. Breathing detection function;
(1) Maximum detection distance: ≤ 2.75 meters;
(2) Reflection time: ≤60s;
B. Breathing frequency statistics function:
(3) Maximum detection distance: ≤1.5 meters;
(4) Maximum respiratory detection frequency: ≤30 times;
(5) Minimum respiratory detection frequency: ≥12 times;
C. Sleep quality assessment function;
D. Sleep time recording function;
E. Environmental state assessment function;
Фон. Early warning design function.
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: Виктор Чжан
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