Asphalt penetration tester capable of automatically aligning needles based on image recognition

The utility model discloses an asphalt needle penetration tester based on image recognition automatic needle alignment, which comprises a water bath device used for storing and preserving heat of asphalt, the water bath device comprises a bearing base, a water bath box, a test bottle, a heating pipe, asphalt and a transmission device, and the transmission device is used for adjusting the position of an asphalt needle. The transmission device comprises a fixed rod, an extension rod, a gear shaft, a knob, a straight gear, a rack, a rotating shaft, a fixed gear, a limiting block, a reset spring, a cross rod and a detection device, the transmission device is used for detecting asphalt, and the detection device comprises a sliding block, a fixed bolt, a sleeve, an electromagnet and a detection needle. The asphalt liquid level detection device has the beneficial effects that the transmission device is utilized, so that the detection position can be randomly adjusted, multiple times of detection comparison can be ca