Requirements Of Answering Machine
An answering machine is an electronic device that automatically responds to a radio interrogation signal when it receives it. So what are the requirements for such a device?
1. The answering machine is powered by two 1.5V dry batteries, and the reader is powered by an external single power supply. The reader uses light-emitting diodes to display the identification results and can identify the presence or absence of answering machines when the distance between the two coupling coils is as large as possible. The recognition accuracy rate is 80%, the recognition time is 5 seconds, and the distance between coupling coils is 5cm.
2. The answering machine adds a code preset function, and the four-digit binary code can be preset with a switch. The reader can correctly identify and display the preset code of the answering machine. The display accuracy rate is 80%, the response time is 5 seconds, and the distance between coupling coils is 5cm.
3. The power supply energy required by the answering machine is all obtained from the coupling coil (the energy is obtained by filtering the combined signal), and the use of batteries and integrated circuits containing batteries is not allowed. The reader can correctly read and display the four-digit binary code preset on the answering machine. The display accuracy rate is 80%, the response time is 5 seconds, and the distance between coupling coils is 5cm.
4. The reader is powered by a single power supply. In the identification state, the power supply power is 2W. Under the condition that the display coding accuracy rate is 80% and the response time is 5 seconds, increase the distance between coupling coils as much as possible.
5. The answering machine increases the information storage function, and its storage capacity is greater than or equal to two four-digit binary numbers. After the device is powered off, the information stored in the answering machine will not be lost. The wireless identification device has the function of writing in the reader and reading the information stored in the answering machine.
