Pharmaceutical injection device, and method for controlling pharmaceutical injection device

A method for controlling a pharmaceutical injection device,

• the pharmaceutical injection device comprising:
• a main body case having a holder for a pharmaceutical cartridge;
• a piston configured to push a pharmaceutical of the pharmaceutical cartridge housed in the holder inside the main body case to an outside of the pharmaceutical cartridge;
• a light emitting component configured to emit lights of different colors on the pharmaceutical cartridge in the holder;
• and
• a light receiving component configured to receive the lights emitted from the light emitting component onto the pharmaceutical cartridge and reflected by the pharmaceutical cartridge, and the method comprising:
• measuring an amount of light by successively emitting the lights of different colors from the light emitting component onto the pharmaceutical cartridge by emitting one of the lights which is of one of the different colors and then emitting another of the lights which is of another of the different colors, and receiving the lights of different colors reflected from the pharmaceutical cartridge;
• removing a minimum value and a maximum value from an amount of the light received by the light receiving component for each of the different colors;
• calculating the average value for the amount of light received by the light receiving component for each of the different colors;
• identifying a type of pharmaceutical cartridge on based on the average value for the amount of light received by the light receiving component for each of the different colors
• comparing the average value for the amount of light received by the light receiving component for each of the different colors;
• and
• issuing a warning output when the average value for the color for which the light receiving component received the greatest average value for the amount of light is lower than a specific value.