| 摘要 |
Emergency Searching System of Cutaway Parachutes designed to automatically determine cutaway moment and automation of the search, increase the accuracy of the search, reducing the hardware cost, power consumption, size and weight. Emergency Searching System of Cutaway Parachutes consists of three devices: "beacon" device, located in a balloon pilot chute; an automatic start-up device, secured on the inside of the strap of parachute backpack under the "cushion" uncoupling device, while at the "cushion” fixed flexible magnetized tape; the searching device with personal computer equipped with a built-in GPS. The "beacon" device contains of an active GPS antenna, GPS receiver, microcontroller (MCU), power supply controller, rechargeable battery, the output of active GPS antenna connected with input of GPS receiver, and it's output connected with input of microcontroller, one of it's output connected with the input of power supply controller, the second input of which connected with the output of rechargeable battery (accumulator), and outputs of which connected with all units of device, in the "beacon" device additionally include analog-to-digital convertor (ADC), volatile memory, USB interface, start button, real-time clock (RTC), digital ISM transceiver, undirected ISM antenna, and another output of rechargeable battery connected with the input of ADC, which output connected with the second input of MCU, which input/outputs connected with relevant input/outputs of volatile memory, USB interface, RTC, digital ISM transceiver, which output connected with undirected ISM antenna, and next output of rechargeable battery connected with the input of GPS receiver, and two inputs of power supply controller connected with outputs of USB interface and start button. An automatic start-up device consists of microcontroller (MCU), power supply controller, rechargeable battery, analog-to-digital convertor (ADC), volatile memory, USB interface, real-time clock (RTC), digital ISM transceiver, undirected ISM antenna, start button, magnetic sensor and two LEDs, the input/outputs of MCU connected with relevant input/outputs of volatile memory, USB interface, RTC and digital ISM transceiver, which output connected with undirected ISM antenna, another outputs of MCU connected with the inputs of first and second LEDs and power supply controller, next inputs of which connected with outputs of USB, start button, magnetic sensor, and input/outputs of power supply controller connected with rechargeable battery, which output also connected with input of ADC, and output of ADC connected with next input of MCU, and power supply controller outputs connected with all units of device. Searching device consists of microcontroller (MCU), USB interface, ISM transceiver, directed ISM antenna and power supply controller, the input/outputs of MCU connected with USB and ISM transceiver, which output connected with directed ISM antenna, next outputs of MCU connected with inputs of power supply controller, which outputs connected with all units of the device. |
