Program introduction:
The passenger car seat belt reminder system is a set of devices used for operating passenger cars to give voice reminders to passengers who are not wearing seat belts.
It includes multiple signal collectors installed under the passenger seat, and a host for collecting signals and playing reminder voices. The collector is powered by batteries, connected with two detection switches (one to detect whether the seat is occupied, and the other to detect whether the seat belt is fastened), and the information of not wearing the seat belt will be transmitted wirelessly after someone is seated; the host is powered by the DC power supply in the car , connected to an external speaker (or through a power amplifier), after receiving the information of not wearing a seat belt from the collector, it will broadcast the corresponding voice to remind the passenger of the seat to fasten the seat belt.
1. Product specifications
1. Working frequency: 433.92MHz or 315MHz or other custom frequency
2. Modulation and demodulation method: ASK
3. Coding and decoding method: learning code
4. Host operating voltage: DC24V or DC12V
5. Host standby current: <18mA
6. Host receiving sensitivity: -110dBm
7. The number of collectors supported by the host: 70 (more can be customized)
8. Host external speaker: 8 ohms (other resistances can be customized)
9. Collector working voltage: DC3V (one CR2032 button battery power supply)
10. Collector standby current: <0.2uA
11. Collector transmit power: 0dBm
12. Communication distance: 50 meters.
2. Technical features of the scheme
1. Using unique coding technology, it improves the transmission efficiency while ensuring reliability, and can accommodate information from 6 collectors within 1 second;
2. The transmitting and receiving frequencies can be customized according to customer needs to avoid co-frequency interference;
3. High receiving sensitivity, adopting multiple checks, the receiving signal is reliable, and there is no bit error;
4. The host can easily learn the code of the collector, so that the collector of any seat number can be added or deleted;
5. The battery power of the collector can last for 3 years;
6. It is possible to modify and add prompt voices, as well as modify and add functions according to customer needs;
7. The circuit board can be designed according to the customer's shell;
8. Low product cost and high cost performance;
9. The product is easy to install and easy to maintain.