CN111988516A - Control device and control method of remote line control camera - Google Patents
Control device and control method of remote line control camera Download PDFInfo
- Publication number
- CN111988516A CN111988516A CN201910425050.7A CN201910425050A CN111988516A CN 111988516 A CN111988516 A CN 111988516A CN 201910425050 A CN201910425050 A CN 201910425050A CN 111988516 A CN111988516 A CN 111988516A
- Authority
- CN
- China
- Prior art keywords
- signal
- adjusting
- control
- module
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
Abstract
The embodiment of the application discloses a control device and a control method of a remote line control camera. The device includes: the main control module is used for sending out an adjusting signal; the self-adaptive resistance adjusting module is used for receiving an adjusting signal and adjusting the voltage dividing resistance value of the voltage dividing resistance so as to adjust the control signal; the input/output interface is used for transmitting a control signal to the remote line control camera; and receiving a video signal; the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal; the main control module is used for judging whether the remote line control camera makes correct response to the control signal according to the frame image of the video signal, and sending an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module. By executing the technical scheme provided by the embodiment, the effect of self-adaptive output of the control signal can be realized for different cameras and cameras connected by cables at different distances.
Description
Technical Field
The embodiment of the application relates to the technical field of signal control, in particular to a control device and a control method of a remote line control camera.
Background
With the rapid development of social economy and the gradual improvement of the technological level, the coverage area of a video monitoring system is gradually increased in order to ensure the personal safety and the property safety of the masses.
In video monitoring transmission, the market share of analog high definition (CVI, TVI and AHD) is not negligible, and especially in the transformation of old cells, the analog high definition has the advantages of being compatible with the existing coaxial cable transmission, so that the analog high definition has the unique advantages.
The key of the analog high definition (CVI, TVI and AHD) is image transmission, PTZ control (Pan Tilt Zoom, Pan Tilt omni-directional control, such as up, down, left and right movement, Zoom control of a lens), and menu selection control (such as movement control and selection control of a frame selection position of a menu on a camera interface), and the transmission distance is very long due to the self-adaptive equalization function in the chip in the image transmission. However, the control of the PTZ is TTL (transistor-transistor Logic) level control, and a receiving end cannot implement processing such as equalization, so that when the PTZ is transmitted in a long distance, due to cable attenuation, the signal amplitude is too low, which causes the PTZ control to be abnormal, and thus the control function cannot be normally implemented; in a short distance, the TTL level amplitude of the control signal is too large, so that the level amplitude of a receiving end is too large, and the level of a receiving pin is damaged. In addition, the output control voltages of the three mainstream analog high-definition protocols are inconsistent, and the PTZ control abnormality is more likely to occur when different protocol devices are docked. Therefore, the distance between the PTZ and the camera affects the correct response of the camera to the control of the high and low voltages of the control signal, and the self-variability between the cameras also affects the control of the PTZ.
Disclosure of Invention
The embodiment of the application provides a control device and a control method of a remote line control camera, which can realize the effect of self-adaptive output of control signals for different cameras and cameras connected by cables at different distances.
In a first aspect, an embodiment of the present application provides a control apparatus for a remote line control camera, where the apparatus includes:
the main control module is used for sending an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module;
the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors and is used for receiving an adjusting signal sent by the main control module and adjusting the divider resistance of the divider resistors according to the adjusting signal so as to adjust the control signal;
the input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera;
the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal;
the main control module is further used for judging whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and sending an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module.
Furthermore, each divider resistor is provided with an adjusting switch;
and after the self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module, the on-off of the adjusting switch is controlled to adjust the voltage dividing resistance value on the control signal circuit.
Further, the regulating switch includes a switching transistor.
Furthermore, the at least two divider resistors are connected in a control signal circuit in a serial and/or parallel manner.
Further, the main control module is further configured to:
and if all the voltage division resistance values of the self-adaptive resistance adjusting module are traversed, judging that the remote line control camera does not make correct response according to the frame image of the video signal, and sending prompt information which cannot control the remote line control camera.
Further, the device also comprises a switch control module;
the main control module is used for sending an adjusting instruction to the switch control module;
and the switch control module is used for adjusting the voltage division resistance value of the self-adaptive resistance adjusting module by controlling the adjusting switch of the voltage division resistor when the adjusting instruction is received.
In a second aspect, an embodiment of the present application provides a method for controlling a remote line control camera, where the method includes:
The main control module sends an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module;
the self-adaptive resistance adjusting module receives an adjusting signal sent by the main control module and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to adjust the control signal; the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors;
the input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera;
the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal;
and the main control module judges whether the remote line control camera makes correct response to the control signal according to the frame image of the video signal, and sends an adjusting signal to the self-adaptive resistance adjusting module again to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module when judging that the correct response is not made.
Further, the method further comprises:
and if all the adjusting modes of the self-adaptive resistance adjusting module are traversed, and the remote line control camera is judged not to make correct response according to the frame image of the video signal, sending out prompt information which cannot be adjusted.
Further, the control signal includes an on-screen menu adjustment.
Further, the control signal is a pulse signal;
the self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to improve the high level value of the pulse signal.
The technical scheme provided by the embodiment of the application comprises the following steps: the main control module is used for sending an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module; the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors and is used for receiving an adjusting signal sent by the main control module and adjusting the divider resistance of the divider resistors according to the adjusting signal so as to adjust the control signal; the input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera; the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal; the main control module is further used for judging whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and sending an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module. Through adopting the technical scheme that this application provided, can realize the effect of control signal's self-adaptation output to the camera of the cable connection of different cameras to and different distances.
Drawings
FIG. 1 is a circuit diagram of a control signal output of a PTZ provided by an embodiment of the present application;
FIG. 2 is an input circuit diagram of a remote line control camera provided by an embodiment of the present application;
fig. 3 is a schematic diagram of a control apparatus of a remote line control camera according to an embodiment of the present application;
fig. 4 is a flowchart of a control method of a remote line control camera according to a second embodiment of the present application;
fig. 5 is a schematic diagram of a control device of a remote line control camera according to a third embodiment of the present application;
fig. 6 is a schematic diagram of a control device of a remote line control camera according to a third embodiment of the present application;
fig. 7 is a schematic diagram of a control apparatus of a remote line control camera according to a third embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
In video monitoring transmission, the market share of analog high definition (CVI, TVI and AHD) is not negligible, and especially in the transformation of old cells, the analog high definition has the advantages of being compatible with the existing coaxial cable transmission, so that the analog high definition has the unique advantages.
The key of simulating high definition (CVI, TVI and AHD) is image transmission and PTZ control, and the chip inside the image transmission has a self-adaptive equalization function, so the transmission distance is very long. The PTZ control is TTL level control, and the receiving end is not subjected to processing such as equalization and the like, so that when long-distance transmission is carried out, due to cable attenuation, the signal amplitude is too low, and the PTZ control is abnormal; in a short distance, the TTL level amplitude of the control signal is too large, so that the level amplitude of a receiving end is too large, and the level of a receiving pin is damaged. In addition, the output control voltages of the three mainstream analog high-definition protocols are inconsistent, and the PTZ control abnormality is more likely to occur when different protocol devices are docked. The purpose of this patent is to solve the problem of adaptive matching of the PTZ control signal under different protocol conditions. The drive-by-wire signal is a group of control commands, and the NVR/DVR completes the interaction with the front-end computer information through the signal.
The embodiment provided by the application can be used for solving the problems in the prior art. Fig. 1 is a circuit diagram of a control signal output circuit of a PTZ provided in an embodiment of the present application. As shown in fig. 1, the PTZOUT _2 is an output pin of a control signal, and by setting resistance values of R31 and R251, which are 75 ohms and 10 ohms, respectively, an output level value of the control signal can be obtained under the control of a pull-down resistor R5, as shown in fig. 1, the left side is a control signal output end, the control signal can reach the remote line control camera through a coaxial line, in a general case, a control signal access end of the remote line control camera is also provided with a grounded pull-down resistor, and the resistance value is also 75 ohms, so that a high level and a low level of the control signal actually received by the remote line control camera are constant values, and an effect of adjusting the output level value of the control signal cannot be achieved. As the above data, a level value of the control signal actually received by the remote-by-wire camera may be exemplarily calculated.
PTZ swing＝3.0V*[37.5/(R31+R251+37.5)]。
The PTZ swing is a level value of the control signal, and 37.5 ohms is obtained by connecting two resistances of a remote line control camera terminal and a PTZ terminal R5 in parallel, wherein the two resistances are 75 ohms.
In addition, fig. 2 is an input circuit diagram of the remote line control camera provided in the embodiment of the present application. As shown in fig. 2, after receiving the DVR coaxial control signal input from the back end at the camera end, the DVR coaxial control signal input is compared with a voltage setting "X" by a comparator, and if the level value of the received control signal is greater than X, the received control signal is considered as a high level, and if the level value of the received control signal is less than X, the received control signal is considered as a low level. It follows that the identification of control signals may be different if X is different for different remote-by-wire camera settings. Meanwhile, since the transmission of the coaxial cable has a resistance value, when the length of the coaxial cable is long, for example, exceeds 800 meters or more, a certain attenuation may be caused to the level value of the control signal, which may also result in that the control signal cannot be correctly identified.
It can be seen that the prior art has the following disadvantages:
disadvantage 1:
the front-end machine adopts a circuit of a comparator relative to the processing of the PTZ drive-by-wire signal, and if the output signal is higher than a certain value, a high level is output, otherwise, a low level is output. As shown in fig. 2, however, in the CVI, TVI and AHD standard protocols, the voltage setting values of the "-" poles of the corresponding comparators may be different, which results in the problem that the PTZ line control cannot be controlled when the lengths of the coaxial cables are different;
And (2) disadvantage:
the CVI, TVI and AHD protocols support video image signals with the distance of 800 meters or more, and in order to achieve the purposes of visibility and controllability, PTZ control under the three protocols is mutually compatible, so that the level voltage division of a PTZ control circuit of the DVR is not suitable in a resistance constant value mode.
Example one
Fig. 3 is a schematic diagram of a control apparatus of a remote line control camera according to an embodiment of the present disclosure, where the present embodiment may be suitable for a case where a remote camera is controlled through a cable, and the apparatus may be implemented by software and/or hardware, and may be integrated in an omni-directional control pan/tilt head.
As shown in fig. 3, the control apparatus of the remote line control camera includes:
the main control module 310 is configured to send an adjustment signal to the adaptive resistance adjustment module 320 to adjust a voltage division resistance value of the adaptive resistance adjustment module;
the adaptive resistance adjusting module 320 is arranged on the control signal circuit, and includes at least two voltage dividing resistors 321, and is configured to receive an adjusting signal sent by the main control module, and adjust a voltage dividing resistance value of the voltage dividing resistor 321 according to the adjusting signal to adjust the control signal;
an input/output interface 330, configured to send the control signal adjusted by the adaptive resistance adjustment module 320 to a remote line control camera through a cable; receiving a video signal returned by the remote line control camera;
The analog video decoding module 340 is configured to decode the video signal to obtain a frame image of the video signal;
the main control module 310 is further configured to determine whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and send an adjustment signal to the adaptive resistance adjustment module 320 again when it is determined that the correct response is not made, so as to adjust the voltage dividing resistance value of the adaptive resistance adjustment module 320.
The master control module can be a control chip and can be used for sending out a control signal, sending out an adjusting signal for a voltage dividing resistance value and receiving images or video data returned by the remote line control camera.
In this embodiment, the adaptive resistance adjustment module is disposed at any position on the control signal circuit, as long as the voltage value of the control signal output by the main control module can be changed. The adaptive resistance adjusting module comprises at least two divider resistors, wherein the at least two divider resistors can be connected to the control signal circuit in a serial and/or parallel manner, and can play a role in pulling up or pulling down the level value of the control signal on the circuit. The self-adaptive resistance adjusting module is used for receiving an adjusting signal sent by the main control module and adjusting the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to adjust the control signal.
It should be noted that, in this embodiment, a control signal that is not adjusted or a control signal that is adjusted by default may be used as the initial control signal, and if this control signal cannot obtain a correct response, the control signal may be adjusted up or down by adjusting the voltage dividing resistance value of the adaptive resistance adjusting module until the control signal can be correctly responded.
And the input/output interface can send the control signal adjusted by the self-adaptive resistance adjusting module to the remote line control camera through a cable so as to realize the control of the camera, such as zooming, steering and the like. And the input-output interface can also receive a video signal returned by the remote line control camera. The video signal can be information recorded by a remote line control camera at a remote end.
The analog video decoding module may decode the video signal after receiving the video signal, to obtain a frame image of the video signal.
The main control module can judge whether the remote line control camera makes correct response to the control signal according to the frame image of the video signal, and sends out an adjusting signal to the self-adaptive resistance adjusting module again when judging that no correct response is made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module.
Wherein it can be determined whether the remote control camera has made a correct response from information in the frame image. For example, the aforementioned control signal may be an on-screen menu type adjustment signal, such as an image with a menu displayed on the screen, after the platform receives the frame image, the image therein may be identified, and if the image with the menu exists, it may indicate that a correct response can be made. Or the camera can enter a specific menu page by sending out the control signal again, and whether the camera responds correctly can be determined by identifying whether the menus of the two times are the same or not and whether the menu page into which the camera is actually controlled enters. In addition, the control command can be identified by other means, such as storing the corresponding control command in a blanking signal in a video signal returned by the remote line-control camera, and making a correct response to whether the control command in the blanking signal is executed, so as to determine whether the remote line-control camera can correctly receive the control command. Wherein the blanking signal is for the imaging scanning circuit of the picture tube. The electron beam from the electron gun scans from the top left corner of the screen to the right (line pass), and after one line scan, the electron beam is moved from the right back to the left to scan the second line (line pass), and the electron beam continues to move in the zigzag pattern, finally scanning all lines of one frame of image (field pass). The retrace line, which occurs during retrace, of the beam interferes with the image being conveyed in the forward stroke, during which time a signal must be applied to the circuit to disable the beam from emitting, a signal which prevents the retrace line from generating being called a line blanking signal. For example, whether or not the rotation control of the camera is performed may be recognized by recognizing key points of the frame image. The camera can also be controlled to display the image of the number 1 or the number 2 on the page after recording a frame of picture, so that when the frame image is identified, if the image of the number 1 or the number 2 is identified, the control signal is indicated to be correctly responded.
In this embodiment, optionally, each voltage dividing resistor is provided with an adjusting switch; and after the self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module, the on-off of the adjusting switch is controlled to adjust the voltage dividing resistance value on the control signal circuit. The voltage divider can be used for controlling the on-off of the adjusting switch by adjusting signals, so that the value of the voltage divider resistance is changed. The advantage of setting up like this can simplify the adjustment mode of the partial pressure resistance of self-adaptation adjusting module, adopts simple regulation logic, is favorable to the realization of this scheme.
In this embodiment, optionally, the regulating switch includes a switching transistor. The base electrode of the transistor can be connected with the adjusting signal, so that the on-off of the transistor can be controlled only by controlling the voltage value of the adjusting signal, and the resistance value of the voltage divider is adjusted.
In this embodiment, optionally, the at least two voltage dividing resistors are connected to the control signal circuit in a serial and/or parallel manner. If the control signals are connected in series, the voltage dividing resistance value can be adjusted from low to high, so that the remote line control camera can adapt to the distance from near to far, the control signals can be accurately identified, and the circuit can be protected from being influenced by overhigh level value of the control signals. If the parallel connection mode is adopted, the voltage dividing resistance value can be controlled from low to high, but the adjustment signal output each time is only to switch off the switches of the voltage dividing resistance one by one.
In this embodiment, optionally, the main control module is further configured to: and if all the voltage division resistance values of the self-adaptive resistance adjusting module are traversed, judging that the remote line control camera does not make correct response according to the frame image of the video signal, and sending prompt information which cannot control the remote line control camera. Wherein, if all partial pressure resistance values are traversed, all remote line control cameras can not be effectively controlled, uncontrollable prompt information can be output, and workers can timely find and intervene and process in a manual mode. The uncontrollable process may be caused by the problem of overlong cable or the problem of over-driving, and the cable process affects the level amplitude of the control signal, so that the high level cannot be correctly read (for example, the high level is lower than the voltage setting "X") and the resistance value of the divider resistor is continuously increased to increase the level amplitude of the high level of the control signal, and if the high level is not correctly responded to the highest level, the uncontrollable information can be prompted. On the other hand, if the level amplitude of the low level is still larger than the voltage setting "X", there may be an over-driving problem, so that in the case of traversing all the divider resistances, if the control signal cannot be made to correspond correctly, there may be an over-driving problem. The remote line control camera has the advantage that the remote line control camera can be controlled in time.
The technical scheme provided by the embodiment of the application comprises the following steps: the main control module is used for sending an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module; the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors and is used for receiving an adjusting signal sent by the main control module and adjusting the divider resistance of the divider resistors according to the adjusting signal so as to adjust the control signal; the input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera; the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal; the main control module is further used for judging whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and sending an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module. Through adopting the technical scheme that this application provided, can realize the effect of control signal's self-adaptation output to the camera of the cable connection of different cameras to and different distances.
On the basis of the above technical solutions, optionally, the apparatus further includes a switch control module; the main control module is used for sending an adjusting instruction to the switch control module; and the switch control module is used for adjusting the voltage division resistance value of the self-adaptive resistance adjusting module by controlling the adjusting switch of the voltage division resistor when the adjusting instruction is received. Wherein, if need adjust the partial pressure resistance, then main control module as long as output adjust command to switch control module can, there is the switch control module to carry out concrete control to every partial pressure resistance's switch, the benefit that sets up like this can reduce the demand to main control module's control chip's pin quantity, as long as there is a pin output adjust command can to can simplify the design of the main control module of PTZ platform.
Example two
Fig. 4 is a flowchart of a control method of a remote line-control camera according to a second embodiment of the present application. The embodiment can be realized by the device provided by the embodiment of the application.
As shown in fig. 4, the control method of the remote line control camera includes:
s410, the main control module sends out an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module.
S420, the self-adaptive resistance adjusting module receives an adjusting signal sent by the main control module, and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to adjust the control signal; the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors.
S430, an input/output interface, which is used for sending the control signal adjusted by the self-adaptive resistance adjusting module to a remote line control camera through a cable; and receiving a video signal returned by the remote line control camera.
S440, the analog video decoding module decodes the video signal to obtain a frame image of the video signal.
And S450, the main control module judges whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and sends an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module.
The present embodiment provides a control method for a remote-control camera on the basis of the above embodiments, which has the advantage that the effect of adaptively outputting control signals can be achieved for different cameras and cameras connected by cables at different distances.
On the basis of the above technical solutions, optionally, the method further includes:
and if all the adjusting modes of the self-adaptive resistance adjusting module are traversed, and the remote line control camera is judged not to make correct response according to the frame image of the video signal, sending out prompt information which cannot be adjusted.
On the basis of the above technical solutions, optionally, the control signal includes a screen menu type adjustment signal.
On the basis of the above technical solutions, optionally, the control signal is a pulse signal;
the self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to improve the high level value of the pulse signal.
The method can be executed by the device provided by any embodiment of the application, and has the functional modules and the beneficial effects corresponding to the device.
EXAMPLE III
The present application also provides preferred embodiments in order to enable those skilled in the art to more clearly understand the embodiments of the present application.
Fig. 5 is a schematic diagram of a control apparatus of a remote line control camera according to a third embodiment of the present application. As shown in fig. 5, the scheme is a hardware scheme, in which resistor voltage division is set for several stages, and a controller (e.g., a CPU) controls a corresponding gating signal to implement correct matching of level amplitudes of a corresponding PTZ control circuit. Specifically, the main control chip can control the switching on and off of the switching transistors corresponding to R1 and R2 through the resistor condition control end until Rn, so that the magnitude of the voltage division resistance value is adjusted. For example, in an initial state, all the switch transistors are in an off state, the control signal sending module may directly output to the BNC interface according to the level amplitude output by the main control chip, if the remote line control camera cannot respond to the control signal, the switch transistor corresponding to R1 may be turned on, and a control signal is output, if the remote line control camera has not responded, the transistor corresponding to R1 is turned off, the transistor corresponding to R2 is turned on, and so on, if Rn is connected, the voltage division resistance at this time is R1+ R2+ … + Rn, and if the remote line control camera has not responded to the control signal, the prompt information that the remote line control camera cannot be controlled may be sent.
Fig. 6 is a schematic diagram of a control apparatus of a remote line control camera according to a third embodiment of the present application. As shown in fig. 6, an integrated digital potentiometer may be used instead of the divider resistor, and the hardware block diagram is as shown in fig. 6: the scheme has the advantages that: the circuit layout is single, the requirement on IO (input/output) resources of the controller is low, and linear adjustment can be realized; the scheme is insufficient: the tunable resistor is costly and adds to the cost of the design.
Fig. 7 is a schematic diagram of a control apparatus of a remote line control camera according to a third embodiment of the present application. As shown in fig. 7, a manner of building a gating circuit by itself is used to replace a voltage dividing resistor, and a hardware block diagram is as shown in fig. 7: the scheme has the advantages that: the requirement on IO resources of the controller is low, linear adjustment can be realized, and the scheme is more flexible than that of a digital potentiometer; the scheme is insufficient: the cost of the design is increased, and the design is more complicated than the design of a digital potentiometer.
The embodiment solves the following problems existing in the current PTZ control circuit:
1. the problem that the DVR can automatically adapt to proper PTZ level voltage under the condition of adapting to high definition analog (CVI, TVI and AHD) cameras with different protocols is solved, and the driving performance of different protocol devices for controlling the PTZ in a butt joint mode is ensured;
2. the problem caused by overlarge length difference of coaxial cables in the wiring process is solved, so that the camera can normally identify a drive-by-wire signal sent by the DVR under the condition that the PTZ control cable is the longest or the shortest;
3. The cost of wire control is solved, so that the cost of the circuit is lowest.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. A control apparatus of a remote line control camera, comprising:
the main control module is used for sending an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module;
the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors and is used for receiving an adjusting signal sent by the main control module and adjusting the divider resistance of the divider resistors according to the adjusting signal so as to adjust the control signal;
The input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera;
the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal;
the main control module is further used for judging whether the remote line control camera makes a correct response to the control signal according to the frame image of the video signal, and sending an adjusting signal to the self-adaptive resistance adjusting module again when judging that the correct response is not made, so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module.
2. The device according to claim 1, wherein each voltage dividing resistor is provided with an adjusting switch;
and after the self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module, the on-off of the adjusting switch is controlled to adjust the voltage dividing resistance value on the control signal circuit.
3. The apparatus of claim 2, wherein the regulating switch comprises a switching transistor.
4. The apparatus of claim 2, wherein the at least two voltage dividing resistors are connected in series and/or in parallel to the control signal circuit.
5. The apparatus of claim 1, wherein the master control module is further configured to:
and if all the voltage division resistance values of the self-adaptive resistance adjusting module are traversed, judging that the remote line control camera does not make correct response according to the frame image of the video signal, and sending prompt information which cannot control the remote line control camera.
6. The apparatus of claim 1, further comprising a switch control module;
the main control module is used for sending an adjusting instruction to the switch control module;
and the switch control module is used for adjusting the voltage division resistance value of the self-adaptive resistance adjusting module by controlling the adjusting switch of the voltage division resistor when the adjusting instruction is received.
7. A method of controlling a remote line control camera, comprising:
the main control module sends an adjusting signal to the self-adaptive resistance adjusting module so as to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module;
the self-adaptive resistance adjusting module receives an adjusting signal sent by the main control module and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to adjust the control signal; the self-adaptive resistance adjusting module is arranged on the control signal circuit and comprises at least two divider resistors;
The input/output interface is used for transmitting the control signal regulated by the self-adaptive resistance regulating module to the remote line control camera through a cable; receiving a video signal returned by the remote line control camera;
the analog video decoding module is used for decoding the video signal to obtain a frame image of the video signal;
and the main control module judges whether the remote line control camera makes correct response to the control signal according to the frame image of the video signal, and sends an adjusting signal to the self-adaptive resistance adjusting module again to adjust the voltage dividing resistance value of the self-adaptive resistance adjusting module when judging that the correct response is not made.
8. The method of claim 7, further comprising:
and if all the adjusting modes of the self-adaptive resistance adjusting module are traversed, and the remote line control camera is judged not to make correct response according to the frame image of the video signal, sending out prompt information which cannot be adjusted.
9. The method of claim 7, wherein the control signal comprises an on-screen menu adjustment signal.
10. The method of claim 7, wherein the control signal is a pulse signal;
The self-adaptive resistance adjusting module receives the adjusting signal sent by the main control module and adjusts the voltage dividing resistance value of the voltage dividing resistor according to the adjusting signal so as to improve the high level value of the pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425050.7A CN111988516B (en) | 2019-05-21 | 2019-05-21 | Control device and control method of remote line control camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425050.7A CN111988516B (en) | 2019-05-21 | 2019-05-21 | Control device and control method of remote line control camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111988516A true CN111988516A (en) | 2020-11-24 |
| CN111988516B CN111988516B (en) | 2021-12-31 |
Family
ID=73436983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910425050.7A Active CN111988516B (en) | 2019-05-21 | 2019-05-21 | Control device and control method of remote line control camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111988516B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115052026A (en) * | 2022-06-17 | 2022-09-13 | 杭州腾泰智能设备有限公司 | Intelligent control system for common-frequency variable code remote control and network remote interconnection mutual control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674670A (en) * | 2004-03-22 | 2005-09-28 | 株式会社日立国际电气 | Method of a signal transmission and a signal transmission apparatus therefor |
| CN201374779Y (en) * | 2009-02-03 | 2009-12-30 | 厦门市振威安全技术发展有限公司 | Twisted pair video transmission system capable of automatically pre-amplifying and compensating |
| CN101800868A (en) * | 2009-02-10 | 2010-08-11 | 索尼公司 | Receiving equipment, imaging device and method of reseptance |
| CN201986066U (en) * | 2011-03-09 | 2011-09-21 | 深圳市佳信捷电子有限公司 | A transmission system for transferring a plurality of analog signals and digitals signal via a twisted pair |
| CN107517331A (en) * | 2016-06-17 | 2017-12-26 | 浙江大华技术股份有限公司 | A kind of automatic amplitude adjusting method and balanced device for cable transmission |
| US20190068927A1 (en) * | 2017-08-30 | 2019-02-28 | Omnivision Technologies, Inc. | Optical fiber transmission lines for ultra-small image sensors |
-
2019
- 2019-05-21 CN CN201910425050.7A patent/CN111988516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674670A (en) * | 2004-03-22 | 2005-09-28 | 株式会社日立国际电气 | Method of a signal transmission and a signal transmission apparatus therefor |
| CN201374779Y (en) * | 2009-02-03 | 2009-12-30 | 厦门市振威安全技术发展有限公司 | Twisted pair video transmission system capable of automatically pre-amplifying and compensating |
| CN101800868A (en) * | 2009-02-10 | 2010-08-11 | 索尼公司 | Receiving equipment, imaging device and method of reseptance |
| CN201986066U (en) * | 2011-03-09 | 2011-09-21 | 深圳市佳信捷电子有限公司 | A transmission system for transferring a plurality of analog signals and digitals signal via a twisted pair |
| CN107517331A (en) * | 2016-06-17 | 2017-12-26 | 浙江大华技术股份有限公司 | A kind of automatic amplitude adjusting method and balanced device for cable transmission |
| US20190068927A1 (en) * | 2017-08-30 | 2019-02-28 | Omnivision Technologies, Inc. | Optical fiber transmission lines for ultra-small image sensors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115052026A (en) * | 2022-06-17 | 2022-09-13 | 杭州腾泰智能设备有限公司 | Intelligent control system for common-frequency variable code remote control and network remote interconnection mutual control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111988516B (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8970789B2 (en) | Receiving apparatus and control method thereof | |
| US8736768B2 (en) | Video control apparatus and control method thereof | |
| US20110122048A1 (en) | Video wall display system | |
| US20110109799A1 (en) | Video switcher and video switching method | |
| US4751581A (en) | Control system having a plurality of control command sources | |
| AU7921094A (en) | Adaptive videoconferencing system | |
| US8717503B2 (en) | Audio output device connectable with plurality of devices and method of controlling the same | |
| US7106364B1 (en) | Camera control system | |
| US20200351110A1 (en) | Remote automobile diagnostic method, apparatus, and system | |
| US11172136B2 (en) | Image capturing apparatus, control apparatus, storage medium, and control method | |
| CN111988516B (en) | Control device and control method of remote line control camera | |
| US7573500B2 (en) | System and method for communicating data in a video system | |
| US8799939B2 (en) | Video receiving apparatus and video receiving method | |
| US6683597B1 (en) | Monitor connected with a pointing device for adjusting images on a screen | |
| CN106899620A (en) | A kind of data-sharing systems | |
| CN104954846A (en) | Element adjusting method, equipment and system | |
| US8873943B2 (en) | Lens system and image pickup system including the same | |
| US6559963B1 (en) | Image printing apparatus having a camera mountable thereto | |
| US7365772B2 (en) | Communication method and monitoring camera system | |
| KR102046942B1 (en) | Apparatus, method and system for controlling surveillance camera network | |
| US11652954B2 (en) | Information processing apparatus, system, method for controlling information processing apparatus, and storage medium | |
| EP1497828B1 (en) | Method and apparatus for controlling a video signal processing apparatus | |
| CN105262982A (en) | Robot control system | |
| US20060098091A1 (en) | Surveillance system for remotely controlling camera through monitor and method thereof | |
| US7167210B2 (en) | Signal transmission method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |