JPH05176214A - Remote control television camera device - Google Patents

Abstract

PURPOSE:To easily and simply provide a device on any location, to eliminate the need for a power supply for a television camera section and a means vary ing its image pickup direction installed to a supervised location, to transmit a control signal used for controlling the power supply and the camera section, etc., through a coaxial cable from a remote location being a base location and to transmit a video signal and an audio signal picked-up and recorded by the television camera section to the base location. CONSTITUTION:A camera section, etc., and a remote box section 2 are provided on a supervised location. On the other hand, they are connected to a base location from which the camera section, etc., is controlled through one coaxial cable 3. A DC power supply is supplied from the camera control section 1 of the base location to the remote section and a signal used for controlling the camera section, etc., is carried by a multiplex transmission circuit. The control such as image pickup/sound collection start, its end and image pickup direction is implemented for the camera section, etc., of the remote section by a control signal and a video signal and an audio signal obtained by the image pickup are carried simultaneously to the base location. The device is easily provided even on a location where no power supply is available.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention installs a television camera and a microphone at a location (remote location) 200 to 300 meters away from a base (base) where an operator is located, and sends a wide range of images and accompanying sound to the base. More specifically, the present invention relates to a remote control television camera device that can be suitably used for monitoring livestock at a livestock farmer, monitoring wildlife, and the like.

[0002]

2. Description of the Related Art It is often unfavorable to monitor living things, livestock, etc. by waiting nearby. For example, being in the vicinity of the place itself impedes the appearance of the observed organisms, and it is extremely difficult to always accompany the animals in the cold area, especially in the middle of the night to give birth or treat diseases. .. In such a case, it is desirable to be able to stay in a remote place, constantly monitor the situation, and go to the place if necessary from the situation.

In general, a monitored place is a place where it is difficult to carry in equipment easily or there is a problem in power supply. Therefore, it is necessary to spend a considerable amount of time and money to prepare a system by preparing a large-scale equipment and a battery, and operate these devices by separating them to a position where there is no obstacle. In the case of long-term monitoring, even if the battery has a large capacity, the power supply is insufficient, and in order to solve this, the power must be drawn from either. In addition, there are many places where the power cannot be pulled in depending on the place. In addition, as a monitoring system, for example, there is a system in which equipment for monitoring is provided in advance when building a building and the device is used. However, such a device is expensive and cannot be monitored except in a preset location, and is not mobile or portable.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the purpose thereof is to easily carry out at any place.
In addition, it is easy to install, and it is not necessary to prepare a power source for the TV camera unit installed in the surveillance area and the means for changing the imaging direction, and to operate the power source and the camera unit with a single coaxial cable from a remote location as a base. It is an object of the present invention to provide a remote-controlled television camera device capable of transmitting the control signal of (1) and transmitting the image and sound picked up by the television camera section to the base.

[0005]

In order to achieve the above object, a remote-controlled television camera apparatus according to the present invention comprises a monitor receiver and an operation section for giving an operation instruction, and a camera for sending a control signal and supplying electric power. A control base including a control unit, a television camera unit, an electric movable means for changing the image capturing direction of the camera, and a control signal from the control base to change the image capturing direction of the TV camera unit and change the image capturing direction. A remote unit including a remote box unit for controlling and returning a video signal and an audio signal picked up by the TV camera unit, and a control signal, a video signal, and an audio signal between the control base and the remote unit. It is composed of one coaxial cable that transmits by a multiplex transport system and also transmits power. Also,
A microphone is provided in the camera control unit and an earphone or a speaker is provided in the remote unit, and the speaker or the earphone of the monitor receiver and the microphone of the television camera unit are used together to enable mutual communication. Further, the television camera unit has an illumination lamp.

Further, the camera control section instructs the television camera section and the electric movable means to start a predetermined operation such as start / stop of photographing, enlargement / reduction of a photographing range, lighting of an illumination, and electric movable means up / down / left / right operation. A Manchester code conversion unit for converting into a Manchester code corresponding to the signal generated by the operation means, a modulation means for modulating a carrier wave with the Manchester code, and a coaxial circuit for superposing the modulated wave and a predetermined DC power source. And a video signal and an audio signal which are sent via the coaxial cable and are separated and sent to the monitor receiver. The remote unit is sent via the coaxial cable. Video signal separated by the incoming carrier wave and DC power source and captured by the TV camera section And a sending / separating means for sending an audio signal to the coaxial cable, a demodulating means for detecting the carrier wave and demodulating it into a Manchester code, and a decoding control code for decoding the Manchester code to restore a corresponding control signal. It is composed of a Manchester code decoding unit for operating the electric movable means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a block diagram showing an outline of a remote control television camera device according to the present invention. The television camera section is composed of a camera 5, a microphone 8 attached to the camera 5, and an illumination lamp 7. The camera 5 is mounted on the electric pan head 6 and is capable of panning and tilting so that the imaging direction of the camera can be swung vertically and horizontally. The device for monitoring the video and audio is connected to the remote box unit 2. The remote unit including the TV camera unit and the remote box unit 2 is installed near the object to be photographed.

This remote unit is connected to a base (base) consisting of a monitor receiver 4 and a camera control unit 1 at a distance of 200 to 300 meters by one coaxial cable 3. Coaxial cable for relay is 3C-2V
(JIS standard) 200 m, 5C-2V can transmit about 300 m. The remote unit does not need a power source for the TV camera unit and the electric camera platform 6, is fed from the base by the coaxial cable 3, and an operation signal for operating the TV camera unit and the electric camera platform 6 is transmitted by the carrier wave. It On the other hand, the video signal and the audio signal picked up and picked up by the remote unit are transmitted to the base by the carrier wave by the coaxial cable 3. A microphone 10 is connected to the camera control unit 1 and an earphone 9 is connected to the remote box unit 2. By using the monitor receiver 4 on the base side and the microphone 8 on the remote unit, the base unit and the remote unit can be connected. They can talk to each other.

FIG. 2 is a circuit diagram showing in detail an embodiment of the camera control section 1 and the remote box section 2 of FIG. The camera control unit 1 is provided with a DC power source 20 of DC 24V (rated), which is turned on by turning on the power switch. This DC power supply 20 can use a 24V battery or can be made from AC85V-265V. The DC power source 20 is connected to both ends of the bypass capacitor C31 of 455 KHz, and the − side is connected to the outer conductor side of the coaxial cable 3 in relation to the camera and other devices. Also,
A large-capacity electrolytic capacitor C33 is inserted in parallel. On the other hand, in the remote box unit 2, input 12V ~ 2
4V (rated value) (actually covers 10.5 to 28V)
The DC-DC converter 33 corresponding to is provided so that the voltage adjustment by the cable length becomes unnecessary up to the maximum cable length. In this example, the DC-DC converter 3
3 can supply DC 6V, 1A. DC-DC
The input of the converter 33 is connected to both ends of the 455 KHz bypass capacitor C32 connected to the receiving end side of the remote box unit 2, and the-side thereof is connected to the outer conductor of the coaxial cable 3. Further, a large-capacity electrolytic capacitor C34 is provided in parallel with the bypass capacitor C32 so as to absorb the fluctuation of the voltage on the receiving end side.
Has been inserted.

An operation signal input to the camera control section 1 is converted into a 16-bit control signal by a Manchester code and transmitted to the remote box section 2 via a coaxial cable 3 by a carrier wave. Since the Manchester code is repeatedly and repeatedly transmitted, the operation signal is immediately transmitted. The main operation signals are a signal for moving the camera angle up, down, left and right, a signal for setting the zoom lens to the telephoto side and a wide angle, auto panning (automatic swing) of the camera, and a blinking signal of the illumination lamp. The above is 1
8 out of 6 bits are used. When a contact signal instructing a specific operation is input by the operation button 11, the Manchester code conversion IC 12 outputs a serial signal of a corresponding Manchester code. In order to repeatedly generate this signal, an oscillator 13 is connected to the Manchester code conversion IC 12 and a start pulse is repeatedly applied to the Manchester code conversion IC 12.

The Manchester code is 4 by the modulator 15.
It is placed on the carrier wave of 55 KHz, and the carrier wave is the switch 18.
The signal is amplified to a proper level by the amplifier 19 via the.
The amplified carrier wave is sent to the coaxial cable 3 via the 1: 1 ring core transformer T21. The remote box unit 2 connected to the receiving end of the coaxial cable 3 is also provided with a 1: 1 ring core transformer T22 as in the transmitting end side, and the carrier wave sent via the coaxial cable 3 is a ring core transformer. It is added to a terminating resistor 25 connected in parallel to the transformer through T22. This carrier wave is detected by the detection amplifier 24 and demodulated, and then input to the Manchester code conversion IC 29 via the switch 27. The Manchester code conversion IC 29 converts the serial signal into a control signal corresponding to the Manchester code. The corresponding analog switch 32 is connected and controlled by this control signal, and a signal for operating the recording of the camera, the platform, the lighting, etc. is sent to the corresponding device.

Here, 455 KHz is selected as the carrier because the components can be easily obtained as the intermediate frequency of the radio and the cost is low, and it is commonly used for the original oscillation of the parallel signal Manchester code conversion IC. Because you can. Needless to say, a frequency different from 455 KHz can be selected. In addition, when connecting to the coaxial cable 3, the camera control unit 1 side and the remote box unit 2 are connected.
Each side has a sufficiently large ring core choke coil L
The reason why 21 and 22 are used is to avoid the saturation of the transformer core due to the direct current. Therefore, one end of the choke coils L21, 22 and the transformer T2
Capacitors C21 and 22 for blocking direct current and connecting as alternating current are connected between the ends of the coils 1 and T22. Since the capacitor C21 causes resonance between the choke coil L21 and the coil of the transformer T21, the resistor R21 is connected to the capacitor C2 for damping.
1 connected in parallel. For the same reason, the resistance R
22 is connected in parallel with the capacitor C22. The inductance of the choke coils L21, 22 is set to around 120 μH so that the frequency is around 455 KHz due to resonance with the capacitors C11 and C12. As described above, power can be supplied from the camera control unit 1 to the remote box unit 2 and operation signals can be transmitted.

Next, the operation of sending a video signal and an audio signal from the remote box section 2 side to the camera control section 1 will be described. The NTSC video signal and audio signal are input from the camera 5 to the RFMOD IC 34 and CH1 or C
Modulate the carrier wave of H2. Whether to set CH1 or CH2 is selected by previously switching to either of the two crystal oscillators or the output of the ceramic oscillator 37 by the switch 36. This modulated VHF is amplified to a proper level by an amplifier 35 and then added to the primary side of a 1: 1 ring core transformer T11. One end of the secondary coil of the transformer T11 is connected to the center conductor of the coaxial cable, and the other end is connected to the outer conductor of the coaxial cable 3 through the capacitor C11 (1000 pF).

In the camera control unit 1, one end of the 1: 1 transformer T12 on the primary side is connected to the center conductor of the coaxial cable 3, and the other end is connected to the outer conductor via the capacitor C12. The secondary side of the transformer T12 is connected to the antenna input of the monitor receiver 4. The booster amplifier 22 is inserted as needed. The modulated VHF from the remote box unit 2 is input to the monitor receiver 4 via the transformer T12 (through the booster amplifier 22 as necessary) and is reproduced. If the booster amplifier 22 is not provided, the terminating resistance of the coaxial cable becomes the impedance of the antenna input of the receiver. Therefore, if it does not match the impedance of the coaxial cable (3C-2V, 5C-2V is 75 ohms), matching is performed. There is a need. Also, the input impedance of the booster amplifier 22 needs to be matched. The 1000 pF capacitor used for the connection with the external conductor has a reactance of about 1.6 ohm at the frequency of CH1 or CH2 (about 100 MHz), and does not cause any problem.

Next, the intercom line will be described. In order to make a mutual call between the camera control unit 1 and the remote box unit 2, the switches 18 and 27 are switched from the contact positions shown to the other contact position. The voice input from the microphone 16 is AM-modulated by the amplification modulator 14 and then sent to the coaxial cable 3. In the remote box unit 2, after being detected and amplified by the detection amplifier 24, it can be heard by the earphone 28. The microphone 8 of the camera 5 and the speaker or earphone of the monitor receiver 4 are used for audio input and output from the remote box unit 2 to the camera control unit 1.

The choke coil, the coil of the transformer and the capacitor in the above multiplex transmission circuit form a low-pass filter, which does not hinder the transmission of direct current. Only the DC resistance matters. Moreover, the reason why the transformer coupling is used for transmitting and receiving each carrier wave is that the power source of each circuit can be supplied by one DC power source, and the ground potential can be the same as the outer conductor of the coaxial cable. .. It can be floated when no power supply is needed. Since the circuit configuration is as shown in FIG. 2, no influence is caused by turning on / off the DC power supply. In this embodiment, ring cores are used for both the transformer and the choke coil, but there is no particular problem even if a pot-shaped core or an EI-shaped core is used. When adding a carrier wave, an intercom line of about 100 KHz can be used. Further, for data transmission, 10.7 MHz, which is an intermediate frequency of FM and is easy to obtain parts, or 4.5 MHz, which is an intermediate frequency of sound of a television, can be used.

3A and 3B are views showing the outer appearance of the camera control unit of the base, FIG. 3A is a view of the camera control unit casing seen from the top, and FIG. 3B is a view seen from the side. .. A coaxial cable 55 for connecting the antenna input terminal of the monitor receiver 4, a DC power input cord 50, and an AC power input cord 49 are drawn out from the rear surface of the camera control housing 56. Further, on the back side, a BNC connector 54 for connecting the remote unit, an AC-DC changeover switch 53 for switching between DC power input and AC power input, an AC power fuse and holder 51 and D.
A C power supply fuse and a holder 52 are provided. An intercom microphone 48 is embedded in the center of the front surface of the camera control housing 56.

The operation switches for operating the camera unit and the like are arranged on the inclined portion of the upper surface of the camera control unit casing 56. At the center of the inclined portion, button switches 40 (upward angle operation), 41 (downward angle operation), 42 (leftward angle operation) and 43 (rightward direction) for operating the imaging angle of the electric platform. Angle operation) is arranged in a circular shape. Further, a zoom telephoto switch 38 and a zoom wide angle switch 39 for operating the imaging range of the camera in the telephoto wide angle are provided on the left side of the inclined portion, and a changeover switch for switching between the camera operation and the intercom microphone is provided below the zoom telephoto switch 38 and the zoom wide angle switch 39. 46 are provided respectively. On the other hand, a switch 44 for turning on / off the illumination lamp, a switch 45 for turning on / off the auto panning, and a power switch 47 are provided on the right side of the inclined portion. The switches 38 to 43 are momentary type switches, and the switches 44 to 47 are alternate type (in operation, pilot lighting) switches.

[0019]

As described above, since the remote-controlled television camera device according to the present invention is configured to supply power to the remote unit from the base, it is not necessary to prepare a power source at the camera installation location, and the relay is used. Since it is configured to be performed by one coaxial cable, there is an effect that it is easy to install and move the camera at the shooting target location. Also,
Since the consumer equipment can be used except for the camera control section of the base of this apparatus and the remote box section of the remote section, there is an advantage that it is extremely economical and can be manufactured at a low price. Therefore, this device is used by general and livestock farmers to monitor livestock and other wildlife. Anti-blurring measures for the elderly in old-age homes, such as towers, underground, underwater monitoring, automated factory monitoring, etc. Wide-ranging surveillance in supermarkets, etc. Measures for serious illness in hospitals It can be widely used for analysis of sports athletes' movements and is considered to be socially useful.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a remote control television camera device according to the present invention.

FIG. 2 is a circuit block diagram showing an embodiment of a camera control unit and a remote box of FIG.

FIG. 3 is a diagram showing an appearance of a camera control unit of the base.

[Explanation of symbols]

1 ... Camera control part 2 ... Remote box part 3, 55 ... Coaxial cable 4 ... Monitor receiver 5 ... Camera 6 ... Electric platform 7 ... Illumination lamp 8 ... Microphone 9 ... Earphone 10 ... Microphone 11 ... Operation button (operating means) 12 ... Manchester code conversion IC 13 ... Oscillator 14 ... Amplification modulator 15 ... Modulator 16 ... Microphone 17, 37 ... Crystal oscillator or ceramic oscillator 18 ... Switch 19 ... Amplifier 20 ... DC power supply 22, 35 ... Booster amplifier 24 ... Detection amplifier 25 ... Termination resistance 27, 36 ... Switch 28 ... Earphone 29 ... Manchester code conversion IC 32 ... Analog switch etc. 33 ... DC-DC converter 34 ... RF modulator 38, 39 ... Zoom operation button switch 40, 41, 42 , 43 ... Button switch for operating imaging angle 44 ... Lighting run Button switch for push-off operation 45 ... Button switch for automatic panning on / off operation 46 ... Button switch for switching camera operation and intercom microphone 47 ... Power switch 48 ... Intercom microphone 49 ... AC power input cord 50 ... DC power input cord 51 ... AC power source fuse and holder 52 ... DC power source fuse and holder 53 ... AC-DC switch 54 ... BNC connector 56 ... Camera control unit housing

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[Procedure amendment]

[Submission date] May 19, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (4)

[Claims] 1. A control base including a monitor receiver and an operation unit for giving an operation instruction, and a control base comprising a camera control unit for transmitting a control signal and supplying power, a television camera unit, and an image pickup direction of the camera is changed. And a control signal from the control base to control the start and end of shooting of the TV camera unit and change of the shooting direction, and return the video signal and the audio signal picked up by the TV camera unit. A remote box part including a remote box part; and a coaxial cable for transmitting a control signal, a video signal, and an audio signal between the control base and the remote part by a multi-carrier system and power transmission. A remote control TV camera device characterized by the above. 2. A microphone is provided in the camera control section,
The remote-controlled television camera device according to claim 1, wherein the remote unit is provided with an earphone or a speaker, respectively, and the speaker or the earphone of the monitor receiver and the microphone of the television camera unit are used together to enable mutual communication. 3. The remote-controlled television camera device according to claim 1, wherein the television camera unit has an illumination lamp. 4. The operation means for instructing the television camera portion and the electrically movable means to start and stop photographing, enlarge / reduce the photographing range, turn on the illumination, and move the electrically movable means up and down and left and right. A Manchester code conversion unit for converting a Manchester code corresponding to a signal generated by the operation unit; a modulation unit for modulating a carrier wave by the Manchester code; and a coaxial cable by superposing the modulated wave and a predetermined DC power source power. The video signal and the audio signal which are sent to the monitor receiver by separating the video signal and the audio signal sent via the coaxial cable, and the remote unit is sent via the coaxial cable. The incoming carrier wave and DC power source are separated, and the video signal captured by the TV camera unit and And sending separating means for sending a voice signal to the coaxial cable, and demodulation means for demodulating the Manchester code by detecting said carrier,
4. The remote controller according to claim 1, wherein the Manchester code is decoded to restore a corresponding control signal, and the Manchester code decoding unit that operates the television camera unit and the electric movable means. Operation TV camera device.