Detection apparatus for phase foreign body in fluid

Abstract

The invention relates to a phase foreign-matter detection device in liquid. The existing technique is easily subjected to the external interference, has low signal-noise ratio and sensitivity and complicated system constitutes. Using a phase contrast technique and light-signal modulation technique, the emergent light-beam of a light-source module is modulated by a signal generator and then processed by a light-beam shaping device, fluid to be tested, a phase contrast imaging object-lens module and a photo detector array; the modulated light-beam permeation signal acquired by the photo detector array is demodulates by a signal demodulator and the information of the presence of the phase foreign-matter is detected. The phase foreign-matter detection device has features of high sensitivity and signal-to-noise ratio, high stability, strong anti-interference capability, simple and reasonable structure, low mechanical location requirement.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a foreign matter detection device, in particular to a phase foreign matter detection device in a fluid. It is mainly used for foreign body detection of fluid products such as medicines, infusion solutions, oral liquids, and beverages in the pharmaceutical and beverage industries. technical background [0002] The foreign matter detection device refers to the device for quality inspection of transparent or translucent medicines, infusion bottles, oral liquids and other fluid products during the production and quality inspection of medicines and beverages. The detection of foreign matter in bottled fluid products mainly detects whether the fluid contains various substances that are insoluble in the fluid, such as glass fragments, solid impurities, etc. As people pay more and more attention to the quality of medicines and food, and the country improves the quality inspection system,...

AI Technical Summary

Problems solved by technology

This method requires a lot of manpower and material resources, the monitoring efficiency and automation are low, and the detection standard is difficult to control and adjust

[0003] There is also an automatic foreign matter inspection machine with double signal reception in the prior art (see the utility model patent "Automatic foreign matter inspection machine with double signal reception", utility model patent number: ZL200720074851.6), and the optical path of this device is sequentially arranged with The luminous tube assembly, the light-emitting light-collecting mirror, the light-receiving light-collecting mirror, the imaging mirror, the beam splitter, and the diaphragm and the light-receiving sensor array set on the two light-splitting optical paths, use the diaphragm in the light path to improve the signal-to-noise ratio and sensitivity of the system , this device has certain advantages, but there are still deficiencies: using the aperture to improve the signal-to-noise ratio and sensitivity of the system, the degree of improvement of the signal-to-noise ratio and sensitivity is limited; the light-receiving sensor array in the system can also receive signal light while receiving signal light. Interfering light from the outside world will cause measurement noise, which will be greatly affected by external interference, which will affect the detection stability; the optical system is complex and requires a high degree of mechanical positioning.

Images