Writing system for counting usage amount and using time of refill

[0017] Such as figure 1 As shown, a writing system for counting the amount of refills and usage time, including: an infrared distance measuring module 1, an LCD driver module 2, an LCD display module 3, a refill 4, a battery 5, a processor 6, a Bluetooth transmitter module 7, Bluetooth receiving module 8 , host computer 9 , pen case 10 , mobile phone 11 . Wherein, the infrared ranging module 1, the LCD driver module 2, the LCD display module 3, the pen core 4, the battery 5, the processor 6, and the Bluetooth transmitting module 7 are arranged in the The inside of the pen case 11; the Bluetooth receiving module 8 and the host computer 9 are located in the mobile phone 11; the LCD driver module 2 is electrically connected to the LCD display module 3; the processor 6 is connected to the infrared The ranging module 1, the bluetooth transmitting module 7, and the LCD driver module 2 are all connected; the battery 5 is respectively connected to the infrared ranging module 1, the LCD