JPH01173296A - Monitoring device - Google Patents

Abstract

PURPOSE:To freely use plural operating devices by eliminating regulation on wiring between the operating device and a controller by forming a prescribed monitoring device by connecting plural operating devices and controllers by a bus shape control signal transmission path. CONSTITUTION:When a power source is applied, the operating devices 21 and 22 monitor the state of a control signal line 24 at a comparison part 35 via a reception part 34, and start to transmit a control signal only when no reception data exists. On the other hand, when the data exists on the control signal line 24, a reception state is set by terminating the issuing of output from a transmission part 33 by a transmission control part 36. While the control signal is transmitted from the transmission part 33, transmission data is compared with the reception data at the comparison part 35, then, the coincidence of the reception data is confirmed. When discrepancy is detected, the transmission is terminated. Meanwhile, in the reception state, the presence/absence of the reception state is decided at the comparison part 35, and when a state where no reception data is received continues for a prescribed period or more, a mode is set at a transmission mode. A conversion part 32 analyzes the reception data, and displays an operating state on a display part 37.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a monitoring device that controls and monitors one or more TV cameras at a plurality of locations within the premises of a building, factory, or the like.

[Prior art and its drawbacks]

Conventionally, when controlling a TV camera with two or more operating devices, operating devices 11, 12, a switching unit 13,
Control unit 14, TV camera 15, monitor TV 16.17
A switching section 13 was required to select the control signal from the operating devices 11 and 12. This switching unit 13 is connected to one of the operating devices (for example, operating device B12) or the controller 1.
Built into 4. However, when using this method by switching between the controller All and the controller B12, a signal line is required to transmit the switching signal from the controller A11 to the switching section 13 in addition to the control signal.

Further, as shown in FIG. 5, a data presence/absence determination section 181 is provided for determining whether or not there is data from the operation device 11 among the control signals from the operation device 11 and the operation device 12. When it is determined that there is a large control signal in the data presence/absence determining section 181, the Q output of the data presence/absence determining section 181 is 1''; , the Q output of the data presence/absence determining unit 181 becomes 0#. Therefore, when it is determined that there is a control signal from the controller 11, the control data is sent to the NAND circuit 1.
82, 183 to the controller 14, and the controller 1
If it is determined that there is no control signal from 1, the control data is output to the controller 14 via NAND circuits 184 and 185.

In this method of controlling the switching unit 13 depending on the presence or absence of a control signal, the operation "17111.
It becomes difficult to control the switching unit I3 from the switching unit 12, and in order to accept forced interruptions, it is necessary to determine the content of the control signal, and the configuration of the switching unit 13 becomes complicated.

Furthermore, in either method, the switching unit 13
12, the controller is Bll, 12, controller I.
4 is centrally determined, and there is no freedom in wiring. Furthermore, when the switching unit 13 is built into the controller 14, it is necessary to individually wire control signal lines from the operating devices A and B to the controller 14, which increases the amount of wiring work.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and in a monitoring device that controls one or more TV left camera pan heads using a plurality of operating devices, it eliminates restrictions on the wiring between the operating devices and The purpose is to provide a monitoring device that can be used freely.

[Key points of the invention]

a controller for controlling one or more television cameras and pan heads;
A television camera monitoring device comprising a plurality of operating devices connected to a single control line from the controller, and a plurality of monitor devices provided for each of the operating devices connected to a signal line from the television camera, The transmission data output from the transmission section and the reception data input from the reception section are constantly compared in the comparison section, and if the comparison results do not match, the transmission from the transmission section is stopped, and the control line Transmission is performed only when there is no control data.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. The configuration of an embodiment of the present invention is shown in Figure 1c. In FIG. 1, an operation device 121, an operation r#B 22, a controller 23
are connected by a control signal line 24 connected in a nose shape using a coaxial cable or the like. The controller 23 outputs control signals for the pan head, lens, etc. to the TV right camera 5, and the TV right camera 5 outputs video signals to the monitor TVs 26 and 27.

Next, the configuration of the operating devices 21 and 22 will be explained with reference to FIG.

The operating devices 21 and 22 include an input section 31 for setting control contents, a conversion section 32 for analyzing the structure of control data, a transmitting section 33 for transmitting control data to the control signal line 24, and a receiving section 3.
4, a comparison section 35 that compares transmitted and received data, a transmission control 36 that controls data transmission, a display section 37 that displays the control status, and a forced interrupt section 38.

Next, the operation of an embodiment of the present invention configured as described above will be explained. When the power is turned on, the controllers 21 and 22
The state of the control signal line 24 is transmitted to the comparing unit 3 via the receiving unit 34.
5, and only when there is no received data, transmission of a control signal is started as shown in FIG. 3 (G). on the other hand,
If there is data on the control signal 1/124, the transmission control section 36 causes the transmission section 33 to not output any data, and enters the receiving state as shown in FIG. 3(B).

By the way, while the control signal is being transmitted from the transmitter 33, the transmitter 35 constantly compares the transmitted data and the received data.
Checking that sent and received data match. If the comparison unit 35 detects a mismatch between the transmitted and received data, the transmission control unit 36 stops the transmission as shown in FIG. 3 (0).

On the other hand, the operating device in the receiving state determines whether or not it is in the receiving state by the constant comparison unit 35, and becomes the transmitting mode if the state in which no received data continues for a certain period of time as shown in FIG. 3 (0). By the way, the control data output from the transmitting section 36 to the control signal line 24 is created by the converting section 32 based on the contents set at the input section 31. Further, the converting section 32 analyzes the received data received by the receiving section 34, and displays the result of the analysis on the display section 37.

Thereby, the operating state of the controller 23 can be displayed both when the operating devices 21 and 22 are in the transmitting state and in the receiving state.

In order to forcibly shift the operating device in the reception state to the transmission state, the transmission control unit 36 is controlled by the forced interrupt unit 38 (forced interrupt switch, etc.), and the operation is forced as shown in Fig. 3 (■). is being sent to. The other controllers that were in the transmitting state stop transmitting because there is a mismatch between the transmitted and received data, but the controller that issued the forced interrupt continues to transmit during the interrupt operation. Even when the forced interrupt operation is canceled (switched on), the controller that performed the interrupt operation can continue to transmit.

Note that the present invention is not limited to the above embodiments,
Three or more controllers can also be connected. Furthermore, two or more controllers can be individually controlled by assigning addresses.

〔Effect of the invention〕

As described in detail above, according to the present invention, a monitoring device can be realized by connecting a plurality of operating devices and controllers through a path-like control signal transmission path, so there are no restrictions on the order of wiring, etc.
The shortest wiring sequence can be used. Further, a special switching section is not required.

Furthermore, even if another controller is in use, the operator can be used by forced interruption.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the operating device of the present invention, FIG. 3 is a diagram showing the mutual operation sequence of the operating devices, and FIG. 4 5 is a diagram showing the configuration of a conventional monitoring device, and FIG. 5 is a diagram showing the configuration of a switching section of the conventional monitoring device. 21.22...operator, 23...controller, 25...
・TV camera, 26.27...Monitor TV133...
- Transmission section, 34... Receiving section, 35... Comparison section, 36
. . . Transmission control section, 37 . . . Display section, 38 . . . Forced interrupt section.

Claims (1)

[Claims] a controller for controlling one or more television cameras and pan heads;
A television camera monitoring device comprising a plurality of operating devices connected to a single control line from the controller, and a plurality of monitor devices provided for each of the operating devices connected to a signal line from the television camera, The operating device includes a transmitter that transmits control data to the control line, a receiver that receives control data from the control line and control data from the transmitter, and a transmission control that controls transmission from the transmitter. and a comparison unit that compares the transmission data input to the transmission unit and the reception data output from the reception unit, and the transmission control unit compares the control data transmitted from the transmission unit and the reception data received by the reception unit. The comparison unit constantly compares the received control data with the control data, and if the comparison results do not match, the transmission from the transmission unit is stopped, and the transmission is started only when there is no control data on the control line. A monitoring device featuring: