CN2222345Y

CN2222345Y - Colour sign sensor

Info

Publication number: CN2222345Y
Application number: CN 94231191
Authority: CN
Inventors: 陈尧生
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-28
Filing date: 1994-12-28
Publication date: 1996-03-13
Anticipated expiration: 2004-12-28

Abstract

The utility model relates to a color code sensor, which belongs to the technical field of photoelectric testing. The utility model is characterized in that a light source is arranged on the focal point of a spherical lens, a viewing window is also provided with a self-focusing lens which receives a light signal, the period length of the self-focusing lens is 1/2, and the numerical aperture of the self-focusing lens is 0.1-0.16. By adopting the color code sensor, the distance between an object to be measured and a receiving terminal has no obvious influence on an output signal, and the sensitivity of distance change, which is caused by the bouncing or the jitter of the object to be measured, is reduced. The utility model has the characteristics of small size, strong anti-astigmation capability and high color distinguishing rate, and can be used with printing industry and packing machinery.

Description

A kind of color mark sensor

The utility model belongs to the photoelectricity test technical field, relates to the color mark sensor in printing industry and the package packing machine.

Traditional color mark sensor has two kinds, and a kind of is emitting optical fiber and the optical fiber color mark sensor that is subjected to the light optical fiber combination, and is responsive especially to the shake of measured object though antijamming capability is strong, so measuring accuracy is low.Another kind is the plain edition color mark sensor, light source is converged to luminous point through beam splitter and lens, after being mapped to the measured object surface reflection, received by photodetector through beam splitter again, because the measured object surface changes to the distance of receiving end, evident difference then appears in output signal thereupon, thus this color mark sensor adjust the distance very sensitive, not high to the resolution capability of color.

The purpose of this utility model is to provide a kind of antijamming capability strong, and color discrimination is high and measured object beated or shake insensitive color mark sensor

The technical solution of the utility model realizes as follows: color mark sensor includes housing, light source, lens, observation window, photodetector, signal processing apparatus and gain knob and contrast adjustment switch, on housing, have an observation window, its spherical lens is embedded in the observation window inboard, light source and observation window over against and be fixed on by fixed mount on the focus of spherical lens, the signal processing apparatus that joins with photodetector also is installed in housing, the outer wall of housing is provided with gain-adjusted knob and contrast adjustment switch, and the telescope of receiving optical signals also is installed at observation window.

Telescope is 1/2 Cycle Length, and numerical aperture is 0.1～0.16 GRIN Lens, and its end is fixed on the observation window, other end alignment light electric explorer, and simultaneously, the emergent light angle θ of GRIN Lens and spherical lens is 8 °～15., and be fixed in the housing by support.

Adopt the utility model compared with prior art, distance does not have obvious influence to output signal between the receiving end of color mark sensor and measured object, having reduced measured object beats or shakes and cause the susceptibility that distance changes to have the advantages that little, the anti-parasitic light ability of volume is strong, color discrimination is high.

Fig. 1 is the utility model structural representation; Fig. 2 is a side view of the present utility model.

Accompanying drawing is a specific embodiment of the present utility model, below in conjunction with accompanying drawing the utility model is further described:

Sequence number among accompanying drawing 1, Fig. 2 is represented to be: 1 is housing, and 2 is light source, and 3 is lens, and 4 is telescope, 5 is signal processing apparatus, and 6 is the gain-adjusted knob, and 7 is the contrast adjustment switch, and 8 is pilot lamp, 9 is observation window, and 10 is photodetector, and 11 is fixed mount, and 12 is support.

As shown in Figure 1: this color mark sensor includes housing 1, light source 2, lens 3, telescope 4, photodetector 10, signal processing apparatus 5 and gain-adjusted knob 6 and contrast adjustment switch 7, on housing 1, have an observation window 9, its lens 3 are embedded in the inboard of observation window 9, light source 2 by be fixed on fixed mount 11 on housing 1 inwall and be placed on the focus of spherical lens and with observation window 9 over against, the Cycle Length of GRIN Lens is 1/2, numerical aperture gets 0.12, its end is fixed on the observation window 9, other end alignment light electric explorer 10, simultaneously, GRIN Lens becomes 10 with the emergent light of spherical lens.Angle, and be fixed in the housing by support 12, photodetector 10 joins with signal processing apparatus 5, also is provided with gain-adjusted knob 6 and contrast adjustment switch 7 in addition on the outer wall of housing 1.

Referring to Fig. 1, Fig. 2: light source 2 is an incandescent lamp, sending the white light that comprises shades of colour concentration becomes parallel light emergence to reflect behind the measured object surface through spherical lens again, by the GRIN Lens receiving optical signals and clear picture ground become on the sensitive area of photodetector 10, resulting signal conveys is to signal processing apparatus 5, at this colour code basal signal as low level, tested colour code signal is as high level, high-low level contrast back output, give corresponding topworks with output signal, during the output high level, pilot lamp 8 is luminous, and pilot lamp 8 extinguishes during low level.When lens 3 exit facets to the distance on measured object surface during in 26～33mm range, the voltage signal of its output changes between 256～260mV, domain of walker only is 4mV, i.e. 1.54% scope.

If 7 groups on contrast adjustment switch can be held to " low " when judging the close colour code of color; If when judging the tangible colour code of contrast, 7 groups on switch is held to " height ".To different colours, this look obviously different with the voltage signal of sensor output: redness is 247mV, and yellow is 279mV, and green is 267mV, and blue look is 337mV, and black is 740mV.

Claims

1. color mark sensor, it includes housing (1), light source (2), lens (3), observation window (9), photodetector (10), signal processing apparatus (5) and gain-adjusted knob (6), with contrast adjustment switch (7), on housing (1), have an observation window (9), its lens (3) are embedded in observation window (9) inboard, light source (2) and watch window (9) over against, and be fixed in the housing (1) by fixed mount (11), the signal processing apparatus (5) that joins with photodetector (10) also is installed in housing (1), the outer wall of housing (1) is provided with gain-adjusted knob (6) and contrast adjustment switch (7), it is characterized in that described lens (3) are spherical lens, described light source (2) is placed on the focus of spherical lens, and the telescope (4) of receiving optical signals also is installed at watch window (9).

2. color mark sensor according to claim 1, it is characterized in that described telescope (4) is the GRIN Lens of 1/2 Cycle Length, one end is fixed on the watch window (9), the other end is facing to photodetector (10), simultaneously the angle theta that emergent light became from focus lens and lens (3) is 8 °～15 °, and is fixed in the housing (1) by support (12).

3. color mark sensor according to claim 2, the numerical aperture that it is characterized in that described GRIN Lens is 0.1～0.16.