JP2011082652A - Universal head device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems, wherein in a universal head that outputs a digital video signal where a rotary shaft performs endless rotation, signal quality is deteriorated by the occurrence of noise, when a high-frequency signal, such as the digital video signal, is caused to pass through a slip ring and that cost is required because a circuit scale is increased and the configuration of a light-emitting/light-receiving element is necessary, when a digital video signal is converted to an optical signal to pass through a shaft part in order to prevent quality deterioration. <P>SOLUTION: The slip ring is configured, in matching with a rotary shaft and a rotating center, and a plurality of digital signals obtained by dividing the digital video signal by a signal division circuit are made to pass to the slip ring. A signal combination circuit combines the plurality of digital signals passing through the slip ring into a single original digital video signal, and the original digital video signal is output from the universal head device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pan / tilt head device equipped with a device that outputs a high-definition video signal.

  A general pan / tilt head device is equipped with an imaging camera, and changes a photographing direction by rotating in a horizontal direction and a vertical direction. The shooting range of the pan / tilt head device is often limited by the rotation range in the horizontal direction, and if the rotation in the horizontal direction is 360 ° or more, the blind spot of shooting is almost eliminated.

  However, a cable for passing a video signal, a control signal, and a power supply often passes through the rotating shaft of the pan head device, and the cable is twisted and cut when the shaft rotates 360 ° or more.

  Therefore, in the pan head device whose rotation axis is 360 ° or more, that is, endless rotation, as in Patent Document 1, a slip ring that transmits a signal between the fixed portion and the rotating portion is configured and electrically connected. There are many cases.

  In addition, with the higher definition of the photographing camera, the signal capacity of the video signal is increased, and the influence of noise generated on the signal transmission path on the image quality is increased.

  In Patent Document 1, a digital video signal is converted into an analog video signal, further separated into an analog luminance signal and an analog color signal, passed through a slip ring, and converted again into a digital video signal. .

  This prevents cross color and prevents deterioration in image quality due to passing the analog composite video signal through the slip ring.

  In Patent Document 2, the video signal is exchanged simultaneously with the slip ring to increase the transmission capacity, thereby preventing the deterioration of the video signal.

JP 2007-049523 A Japanese Patent No. 3687453

  In general, a slip ring transmits a signal by sliding a conductive brush and a conductive ring as a pair (hereinafter referred to as “pole”) while the conductive brush and the conductive ring are kept in contact with each other. Electrically connect the moving parts.

  When exchanging signals via the slip ring, the signal is affected by the effect of noise caused by changes in the contact between the conductive brush and the conductive ring, or by the change in the angular positional relationship between the terminal connected to the conductive ring and the conductive brush. Changes in transmission performance.

  This tendency is particularly noticeable in high-frequency signals, and it is difficult to transmit high-definition video signals typified by HD-SDI signals via slip rings.

  In addition, when a signal is transmitted through a slip ring as described above, a passing signal may be affected by noise, and an analog signal like Patent Document 1 is difficult to restore when the signal is deteriorated by noise. become.

  Further, in order to use a slip ring and an optical signal as in Patent Document 2, a slip ring, an E / O conversion circuit, an O / E conversion circuit, a light emitting element, and a light receiving element are necessary, which may increase the manufacturing cost. There is.

  Accordingly, an exemplary object of the present invention is to provide a pan head apparatus that can endlessly rotate the pan shaft of the pan head apparatus with a simple configuration and can output a high-quality high-quality digital video signal.

  In order to achieve the above object, the pan / tilt head device of the present invention is equipped with a device for outputting a digital video signal, a slip ring having the same rotation axis as the horizontal direction, and a digital video signal from the original digital video. A signal dividing circuit that divides the signal into a plurality of digital signals having a frequency lower than the signal frequency of the signal, and a signal synthesis circuit that combines the divided digital signals into the original digital video signal. A plurality of divided digital signals are transmitted.

  Further objects and other features of the present invention will be made clear by the preferred embodiments described below with reference to the accompanying drawings.

  According to the present invention, it is possible to reduce deterioration of a signal passing through a slip ring in a pan head device that uses a slip ring for electrical connection between a fixed part and a rotating part to rotate the rotating shaft endlessly. it can.

  In addition, since the signal passing through the slip ring, which may cause signal degradation, is a digital signal, it can be restored even when the signal level is lowered, and the digital video signal output from the pan head device can be kept in high quality. Can do.

Typical configuration of the pan head apparatus of the first embodiment of the present invention Typical configuration of the pan head apparatus of the second embodiment of the present invention Typical configuration of the pan head device of the third embodiment of the present invention Typical configuration of the pan head apparatus of the fourth embodiment of the present invention

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 shows the configuration of a pan / tilt head device according to the first embodiment of the present invention.

  In FIG. 1, the pan head apparatus is roughly composed of a fixed portion 13 and a rotating portion 14. The fixed unit 13 and the rotating unit 14 of the camera platform device are electrically connected by the first slip ring 3 and the second slip ring 4. Among the lines indicating electrical wiring, the white line indicates a signal line, and the black line indicates a ground which is a reference voltage line.

  The imaging device 1 that outputs a digital video signal is mounted on the rotating unit 14 of the pan / tilt head device. Specifically, the imaging device 1 is a television camera having an HD-SDI output.

  The signal dividing circuit 2 is provided in the rotating unit 14 of the camera platform device, and the digital video signal output from the imaging device 1 is divided into n digital signals by the signal dividing circuit 2, and the divided digital signal The signal frequency is 1 / n of the signal frequency of the original digital video signal.

  In FIG. 1, since the number of signal lines output from the signal dividing circuit 2 is three, when the digital video signal is an HD-SDI signal, the signal frequency is about 1.5 Gbps. Three 500 Mbps digital signals are generated.

  The first slip ring 3 and the second slip ring 4 are mounted so that the rotation axis in the horizontal direction of the pan head device and the rotation center are the same, and by frictional contact between a conductive ring (not shown) and a conductive brush (not shown). The fixed unit 13 and the rotating unit 14 of the camera platform device are electrically connected.

  The signal dividing circuit 2 to the signal synthesis circuit 4 through the first slip ring 3 are connected by n digital signal lines and 1 or more and n or less reference voltage lines.

  The number of poles of the first slip ring 3 is more than the total number of digital signals n and reference voltage lines.

  In FIG. 1, the number of reference voltage lines is one for three digital signal lines, and one digital reference voltage is shared by three digital signals.

  The signal synthesis circuit 5 is provided in the fixed unit 13 of the camera platform device, and the n digital signals are synthesized into one original digital video signal by the signal synthesis circuit 5 and output from the camera platform device.

  In FIG. 1, the signal synthesis circuit 5 synthesizes three digital signals of about 500 Mbps into HD-SDI signals of about 1.5 Gbps and outputs them from the signal synthesis circuit 5.

  The power supply current and the control signal are respectively input to the fixed unit 13 of the camera platform device from a power supply device (not shown) and a camera platform controller (not shown). The power source current and the control signal are input to the power source circuit 6 and the pan head control circuit 7 in the rotating unit 14 of the pan head device via the second slip ring 4. The number of poles of the second slip ring 4 is provided more than the total number of power supply lines and control signal lines.

  In FIG. 1, the first slip ring 3 is accommodated inside the hollow shaft of the second slip ring 4 so that the axial length of the slip ring portion is reduced.

  Therefore, the diameter of the conductive ring (not shown) of the second slip ring 4 is larger than the diameter of the conductive ring (not shown) of the first slip ring 3.

  However, the present invention is not limited to this, and the diameter of the conductive ring (not shown) of the second slip ring 4 may be the same as the diameter of the conductive ring (not shown) of the first slip ring 3.

  The shield material 8 is provided so as to surround the first slip ring 3 and prevents high-frequency noise such as radio waves generated between the first slip rig 3 and the second slip ring 4.

  As described above, according to the present embodiment, the shielding material 8 prevents high-frequency noise such as radio waves, thereby reducing the deterioration of the quality of the digital signal and further improving the quality of the digital video signal output from the pan / tilt head device. .

  FIG. 2 shows a configuration of a pan / tilt head apparatus according to the second embodiment of the present invention.

  In FIG. 2, the pan head apparatus is roughly composed of a fixed portion 13 and a rotating portion 14. The fixed unit 13 and the rotating unit 14 of the camera platform device are electrically connected by the first slip ring 3 and the second slip ring 4. Among the lines indicating electrical wiring, the white line indicates a signal line, and the black line indicates a ground which is a reference voltage line.

  A communication device 9 that outputs a digital video signal is mounted on the rotating unit 14 of the pan head device. Specifically, the communication device 9 is a digital FPU that outputs HD-SDI.

  The signal dividing circuit 2 is provided in the fixed unit 13 of the camera platform device, and the digital video signal input to the camera platform device is divided into n digital signals by the signal dividing circuit 2, and the signal of the divided digital signal is obtained. The frequency is 1 / n of the signal frequency of the original digital video signal.

  In FIG. 2, since the number of signal lines output from the signal dividing circuit 2 is three, when the digital video signal is an HD-SDI signal, the signal frequency is about 1.5 Gbps. Three 500 Mbps digital signals are generated.

  The first slip ring 3 and the second slip ring 4 are mounted so that the rotation axis in the horizontal direction of the pan head device and the rotation center are the same, and by frictional contact between a conductive ring (not shown) and a conductive brush (not shown). The fixed unit 13 and the rotating unit 14 of the camera platform device are electrically connected.

  The signal dividing circuit 2 to the signal synthesis circuit 5 through the first slip ring 3 are connected by n digital signal lines and 1 or more and n or less reference voltage lines.

  The number of poles of the first slip ring 3 is more than the total number of digital signals n and reference voltage lines.

  In FIG. 2, the number of reference voltage lines is one with respect to the number of digital signal lines, and three reference signals are shared by three digital signals.

  The signal synthesis circuit 5 is provided in the rotation unit 14 of the camera platform device, and the n digital signals are synthesized into one original digital video signal by the signal synthesis circuit 5 and input to the communication device 9.

  In FIG. 2, the signal synthesis circuit 5 synthesizes three digital signals of about 500 Mbps into HD-SDI signals of about 1.5 Gbps and outputs them from the signal synthesis circuit 5.

  The synthesized digital video signal is converted into a radio wave or an optical signal by the communication device 9 and output.

  The power supply current and the control signal are respectively input to the fixed unit 13 of the camera platform device from a power supply device (not shown) and a camera platform controller (not shown). The power source current and the control signal are input to the power source circuit 6 and the pan head control circuit 7 in the rotating unit 14 of the pan head device via the second slip ring 4. The number of poles of the second slip ring 4 is provided more than the total number of power supply lines and control signal lines.

  In FIG. 2, the first slip ring 3 is housed inside the hollow shaft of the second slip ring 4 so that the axial length of the slip ring portion is reduced.

  Therefore, the diameter of the conductive ring (not shown) of the second slip ring 4 is larger than the diameter of the conductive ring (not shown) of the first slip ring 3.

  However, the present invention is not limited to this, and the diameter of the conductive ring (not shown) of the second slip ring 4 may be the same as the diameter of the conductive ring (not shown) of the first slip ring 3.

  The shield material 8 is provided so as to surround the first slip ring 3 and prevents high-frequency noise such as radio waves generated between the first slip rig 3 and the second slip ring 4.

  As described above, according to the present embodiment, the shielding material 8 prevents high-frequency noise such as radio waves, so that deterioration of the quality of the digital signal can be reduced and the quality of the digital video signal output from the communication device 9 can be further improved. .

  FIG. 3 shows the configuration of a pan / tilt head apparatus according to the third embodiment of the present invention.

  In FIG. 3, the pan head apparatus is roughly composed of a fixed portion 13 and a rotating portion 14. The fixed part 13 and the rotating part 14 of the camera platform device are electrically connected by a slip ring 10. Among the lines indicating electrical wiring, the white line indicates a signal line, and the black line indicates a ground which is a reference voltage line.

  The imaging device 1 that outputs a digital video signal is mounted on the rotating unit 14 of the pan / tilt head device. Specifically, the imaging device 1 is a television camera having an HD-SDI output.

  The signal dividing circuit 2 is provided in the rotating unit 14 of the camera platform device, and the digital video signal output from the imaging device 1 is divided into n digital signals by the signal dividing circuit 2, and the divided digital signal The signal frequency is 1 / n of the signal frequency of the original digital video signal.

  In FIG. 3, since the number of signal lines output from the signal dividing circuit 2 is three, when the digital video signal is an HD-SDI signal, the signal frequency is about 1.5 Gbps. Three 500 Mbps digital signals are generated.

  The signal synthesis circuit 5 is provided in the fixed unit 13 of the pan head device. The n digital signals separated from the second signal multiplexing / demultiplexing circuit 12 are converted into one original digital video signal by the signal synthesis circuit 5. And output from the pan head device.

  In FIG. 3, the signal synthesis circuit 5 synthesizes three digital signals of about 500 Mbps into HD-SDI signals of about 1.5 Gbps and outputs them from the signal synthesis circuit 5.

  The power supply current and the control signal are respectively input to the fixed unit 13 of the camera platform device from a power supply device (not shown) and a camera platform controller (not shown).

  The first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit multiplex the plurality of digital signals divided by the signal dividing circuit 2, the power supply current and the control signal, and output the multiplexed signal. Further, the input multiplexed signal is separated, separated into a plurality of digital signals, a power supply current and a control signal, and each is output.

  The number of multiplexed signals output from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 is equal to the number of digital signals transmitted from the signal dividing circuit 2, and all signals are converted into digital video. There is no need to multiplex with a digital signal divided from the signal.

  The multiplexed signals output from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 are transmitted between the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12. Sent and received only between.

  The slip ring 10 is mounted so that the rotation axis in the horizontal direction of the pan head apparatus is the same as the center of rotation, and rotates with the fixed portion 13 of the pan head apparatus by frictional contact between a conductive ring (not shown) and a conductive brush (not shown). The part 14 is electrically connected.

  The multiplexed signals sent from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 are transmitted through the slip ring 10 by n signal lines and one or more and n or less reference voltage lines. Connected.

  The number of poles of the slip ring 10 is provided more than the total number of the number n of multiplexed signals and the number of reference voltage lines.

  In FIG. 3, the number of reference voltage lines is one for the number of multiplexed signal lines of three, and one multiplexed reference signal is shared by three multiplexed signals.

  As described above, according to the present embodiment, the number of poles of the slip ring 10 can be reduced by passing the multiplexed signal obtained by multiplexing the divided digital signal, the power supply current and the control signal through the slip ring 10, and the pan head apparatus The cost can be reduced.

  FIG. 4 shows the configuration of a pan / tilt head apparatus according to a fourth embodiment of the present invention.

  In FIG. 4, the pan head apparatus is roughly composed of a fixed portion 13 and a rotating portion 14. The fixed part 13 and the rotating part 14 of the camera platform device are electrically connected by a slip ring 10. Among the lines indicating electrical wiring, the white line indicates a signal line, and the black line indicates a ground which is a reference voltage line.

  A communication device 9 that outputs a digital video signal is mounted on the rotating unit 14 of the pan head device. Specifically, the communication device 9 is a digital FPU that outputs HD-SDI.

  The signal dividing circuit 2 is provided in the fixed unit 13 of the camera platform device, and the digital video signal input to the camera platform device is divided into n digital signals by the signal dividing circuit 2, and the signal of the divided digital signal is obtained. The frequency is 1 / n of the signal frequency of the original digital video signal.

  In FIG. 4, since the number of signal lines output from the signal dividing circuit 2 is three, when the digital video signal is an HD-SDI signal, the signal frequency is about 1.5 Gbps. Three 500 Mbps digital signals are generated.

  The signal synthesizing circuit 5 is provided in the rotating unit 14 of the pan head device, and the n digital signals separated from the second signal multiplexing / demultiplexing circuit 12 are converted into one original digital image by the signal synthesizing circuit 5. The signal is synthesized and output from the communication device 9.

  In FIG. 4, three digital signals of about 500 Mbps are synthesized by the signal synthesis circuit 5 into HD-SDI signals of about 1.5 Gbps and output from the signal synthesis circuit 5.

  The power supply current and the control signal are respectively input to the fixed unit 13 of the camera platform device from a power supply device (not shown) and a camera platform controller (not shown).

  The first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit multiplex the plurality of digital signals divided by the signal dividing circuit 2, the power supply current and the control signal, and output the multiplexed signal. Further, the input multiplexed signal is separated, separated into a plurality of digital signals, a power supply current and a control signal, and each is output.

  The number of multiplexed signals output from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 is equal to the number of digital signals transmitted from the signal dividing circuit 2, and all signals are converted into digital video. There is no need to multiplex with a digital signal divided from the signal.

  The multiplexed signals output from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 are transmitted between the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12. Sent and received only between.

  The slip ring 10 is mounted so that the rotation axis in the horizontal direction of the pan head apparatus is the same as the center of rotation, and rotates with the fixed portion 13 of the pan head apparatus by frictional contact between a conductive ring (not shown) and a conductive brush (not shown). The part 14 is electrically connected.

  The multiplexed signals sent from the first signal multiplexing / demultiplexing circuit 11 and the second signal multiplexing / demultiplexing circuit 12 are transmitted through the slip ring 10 by n signal lines and one or more and n or less reference voltage lines. Connected.

  The number of poles of the slip ring 10 is provided more than the total number of the number n of multiplexed signals and the number of reference voltage lines.

  In FIG. 4, the number of reference voltage lines is one for the number of multiplexed signal lines of 3, and one multiplexed reference signal is shared by three multiplexed signals.

  As described above, according to the present embodiment, the number of poles of the slip ring 10 can be reduced by passing the multiplexed signal obtained by multiplexing the divided digital signal, the power supply current and the control signal through the slip ring 10, and the pan head apparatus The cost can be reduced.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

DESCRIPTION OF SYMBOLS 1 Imaging device 2 Signal division circuit 3 1st slip ring 4 2nd slip ring 5 Signal synthesis circuit 6 Power supply circuit 7 Pan head control circuit 8 Shielding material 9 Communication apparatus 10 Slip ring 11 First signal multiplexing / separation circuit 12 Second signal multiplexing / demultiplexing circuit 13 Fixed portion 14 Rotating portion

Claims (3)

  A pan head device equipped with a device for outputting a digital video signal, turning at least in the horizontal direction and changing the direction of the device, a slip ring having the same rotation axis as the rotation axis in the horizontal rotation axis, A signal dividing circuit unit for dividing a digital video signal output from the imaging device into a plurality of digital signals having a signal frequency lower than the signal frequency of the digital video signal, and a plurality of digital signals divided by the signal dividing circuit unit And a signal synthesizing circuit unit for combining the signals into an original digital video signal, and the slip ring transmits a plurality of digital signals divided by the signal dividing circuit unit.   The pan head device includes a first slip ring that transmits a plurality of digital signals obtained by dividing the digital video signal, and a second slip ring that transmits a power source and a control signal. The pan / tilt head device according to claim 1, wherein a shield material is formed between the second slip rings.   The pan head device includes a signal multiplexing / separating circuit unit that multiplexes the plurality of digital signals with a power source and a control signal, generates a multiplexed signal, and separates the multiplexed signal into a plurality of digital signals and a power source and a control signal. The pan / tilt head device according to claim 1, wherein the slip ring transmits the multiplexed signal.

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