system u201c b u201d may store a software program that is used to perform the signal processing before the reflected spectrum is compared with the reference spectrum the waveform of the reflected spectrum may be normalized to remove the abnormal signals or noises however this is not taken as a limited sense the computer system u201c b u201d may also store the reference spectrum which may be updated by the user 39 s input furthermore the computer system u201c b u201d may be connected to the light guiding member 3 of the puncturing instrument u201c a u201d through a light cable u201c c u201d one end of the light cable u201c c u201d connected to the light guiding member 3 may be provided with a light emitting element c 1 such as a white light emitting diode and at least one image retrieving element c 2 such as a charge coupled device ccd or a micro lens the light emitting element c 1 can emit the light towards the light guiding member 3 the at least one image retrieving element c 2 can retrieve the reflected spectrum from the light guiding member 3 the light cable u201c c u201d and the light guiding member 3 may be engaged with each other by an engaging assembly formed by a male tenon and a female tenon which are not shown in the drawings the puncturing equipment may further include an air valve u201c d u201d such as a conventional fluid regulating valve that is coupled to one end of the puncturing equipment opposite to the gas outlet 22 the air.