JPS6199470A - Image pickup device of moving object - Google Patents

Abstract

PURPOSE:To prevent blur of pictures by preventing the overlap between the irradiation period of illumination to an object to be picked up and the period when the electric charge of a photo diode is transferred to a vertical register in a CCD element. CONSTITUTION:The electric charge is transferred from the photo diode in the CCD element to the vertical register in the period when a waveform A is in the high level. The leading edge of the high level of an illuminating lamp inhibit signal B is ealier than the electric charge transfer period by the illuminating lamp lighting time at least, and the trailing edge is slightly later than the electric charge transfer period. If the illumination trigger signal inputted to a terminal 5 of an illumination controller 11 is not in the period, when the illuminating lamp inhibit signal B sent from a terminal 1 of a CCD camera 10 is in the high level, as shown in a figure C, the illumination controller 11 outputs immediately an illuminating lamp control signal D from a terminal 3 to light an illuminating lamp 12. If the illumination trigger signal is in the period, when the inhibit signal B is in the high level, as shown in a figure F, the illumination controller 11 outputs an illuminating lamp control signal G from the terminal to light the illuminating lamp 12 after the inhibit signal B is changed to the low level.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mobile object imaging device using a CCD camera.

(Prior Art) Traditionally, the mobile imaging system in this building has been known to capture images continuously when objects move in relation to each other, and when the camera is in field accumulation mode, it captures only the amount that the object moves in 1/60 seconds. The object is large, that is.

The image will be captured with a blurred outline. In order to prevent such blurring of the image, a method can be considered to obtain a 1 Ikl image without blur by irradiating the object with illumination light for a short period of time, but in this case as well, the illumination period and the charge of the photodiode in the COD element of the camera are If the period in which the fields are transferred to the vertical register overlaps, the video signal may be divided into two fields or the video signal output level may drop depending on the degree of overlap.

(Object of the Invention) The object of the present invention is to eliminate such drawbacks and to prevent the irradiation period 1 of illumination onto the object to be imaged from overlapping with the period in which the charge of the photodiode is transferred to the duty register in the COD element. An object of the present invention is to provide a mobile imaging device that prevents blurring of images.

(Structure of the Invention) The mobile object imaging device wFi of the present invention includes a CCD camera that images a moving object to be imaged, a lighting device that illuminates the moving object for a predetermined timing signal, and a drive trigger of the lighting device that is input. a lighting control device that forms the timing signal with a predetermined width from the trigger or from the trailing edge of the prohibition signal when the trigger is within the prohibition signal excluding before and after the charge transfer time of the CCD camera; It is composed of zami.

(Example) Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 (4-4) are operational waveform diagrams of FIG. 1. In the figure, 10 is a CCD camera that images a high-speed moving object, and this camera 1O
A Kd video signal output terminal 2 and a lighting lamp INI (IBIT signal output terminal 1) are provided. 11 is a lighting control device;
It has an input terminal 4 for an illumination lamp INHIBIT signal inputted from the camera 10, an illumination trigger signal input terminal 5, and an illumination lamp control signal output terminal 3, and the illumination lamp 12
Illumination lamp: l1lJ Its lighting is controlled by a signal from three signal output terminals.

FIG. 2 IAI shows the charge transfer period from the photodiode of the CCD element to the vertical register in the CCD camera, and the charge transfer is performed during the period )・Irepel.

FIG. 2 fBl, CB') shows the waveform of the illumination lamp INHIBIT signal, and although they are arranged separately for timing comparison, they are the same waveform. This no-i level period is the charge transfer period (5) with the front N&wo at least longer than the illumination lamp lighting time and the rear f& being extended by a very small amount, for example, about 1 μs, and the illumination lamp is not turned on during this period. IF+ is the illumination trigger signal, and it will be a very short high-level pulse at the timing when you want to send the signal to the CCD camera. FIG. 2 (Crow, to+h illumination light control signal waveform) - All illumination lights 12 are turned on during the illumination level. Figure 2 (Yen, @ is the video output signal waveform of the camera.

Next, the operation of this embodiment will be explained.

To Figure 2 ~ (In the case of uniform, the lighting trigger signal tC input to the lighting trigger signal input terminal 5 of the lighting control device 11)
is the illumination light INHIBIT signal sent from the illumination light IN) IIBIT (inhibit) signal output terminal 1 of the camera 10 (the illumination light INHIBIT signal is outside the uniform high level period, that is, it is a period in which it is permissible to turn on the illumination light). , lighting control device 11
Immediately, the illumination light control signal (FIG. 2 (DJ)) is output from the illumination light control signal output terminal 3, and the illumination light 12 is turned on.
A video output signal (FIG. 2 (average)) is output to the video signal output terminal 2 of the CCD camera 10.

In the case of (1k) to (1k) to (1k) to (1k) in FIG. 2, the lighting trigger signal (in FIG.
Signal output terminal Signal deer terminal INHIBI of the lighting light
Since this overlaps with the high level period of the T signal (Fig. 2 (B')'), that is, this is a period in which the illumination lamp should not be turned on, the lighting control device 11 controls the illumination lamp's IN) [IB
After the IT signal (FIG. 2 (B')) changes from high level to low level, the illumination light control signal (FIG. 2 0) is output from the illumination light control signal output terminal 3 to turn on the illumination light 12. A video output signal (FIG. 2 1) 1) '! is sent to the video signal output terminal 2 of the CCD camera 10. I- can be obtained.

In addition, in the single-cusp embodiment, the signals sent from the camera to the lighting control device at the timing shown in FIG. 2 have been explained.

The signal sent to the lighting control device is, for example, a vertical drive signal (VL
)) or other CCI) It goes without saying that any device that can detect the drive timing of the camera may be used.

(Effects of the Invention) As described above, the present invention includes a lighting device and a lighting control device 11 that is controlled by QN-OFF of this lighting control device, and a lighting trigger input terminal and a camera drive device. Equipped with an input terminal for detecting timing, the illumination lamp turns on only during the period of charge transfer from the photodiode of the camera's CCD element to the vertical register.
By performing IBIT, it is possible to obtain an image without image blur and with a stable video output level.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the present invention, and FIGS. In fig. l...Lighting light INHIBIT signal output terminal, 2
......Video signal output terminal, 3..Lighting light control signal output terminal, 4..Lighting light INHIBIT signal input terminal, 5..Lighting trigger signal input terminal , 10... CCD camera, 11... Lighting control device, 12... Lighting lamp. $ 2nd Procedural Amendment (Method) Showa 1°2' Dear Commissioner of the Japanese Patent Office, ``Guha l''! Display of $note 1981 Patent Application No. 2
1985.1 Straddle 2, Title of the invention: Mobile imaging device 3, Relationship to the amended person case Applicant: 5-33-1 Shiba, Minato-ku, Tokyo (423) NEC Corporation Representative: Tadahiro Sekimoto 4; Agent I Subject of Amendment 1311 Each column of ``Detailed Description of the Invention'' and ``Brief Description of Drawings'' as well as the two chicken figures in the drawing. - Contents of the amendment (11 Specification, page 4, line 6 and page 7, line 2 r
, (H') Delete J. (2) "B'" on page 5 v414th line and 17th line of the specification is corrected to rBJ. (3) Figure 2 of the drawings shall be amended as shown in the attached sheet.

Claims (1)

[Claims] A CCD camera that images a moving object to be imaged, an illumination device that illuminates the moving object for a predetermined timing signal, and when a driving trigger of this illumination device is input, the charge of the CCD camera is and a lighting control device that forms the timing signal with a predetermined width from the trailing edge of the prohibition signal when the timing signal is within the prohibition signal including before and after the transfer time.