CN106780843A - A kind of power supply is automatically selected and video switching device - Google Patents
A kind of power supply is automatically selected and video switching device Download PDFInfo
- Publication number
- CN106780843A CN106780843A CN201710085172.7A CN201710085172A CN106780843A CN 106780843 A CN106780843 A CN 106780843A CN 201710085172 A CN201710085172 A CN 201710085172A CN 106780843 A CN106780843 A CN 106780843A
- Authority
- CN
- China
- Prior art keywords
- port
- level signal
- capacitor
- camera
- resistor
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 239000003990 capacitor Substances 0.000 claims description 78
- 230000005669 field effect Effects 0.000 claims description 32
- 239000000470 constituent Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Studio Devices (AREA)
Abstract
The present invention proposes a kind of power supply and automatically selects and video switching device, wherein, including：The right side flash lamp detection port detected for whether working right side flash lamp, the back-up lamp detection port detected for whether working back-up lamp, single-chip microcomputer, normal open switch, normally closed switch, power supply, the first camera, second camera, electronic switch, VT, ACC management circuit, ACC output ends；Realized with this and conveniently operated, it is ensured that the safety for using, and can easily switch both sides picture when being moveed backward or being prepared and driven, can simultaneously consult the situation of automobile opposite side and caudal.
Description
Technical Field
The invention relates to the field of safety monitoring equipment, in particular to a power supply automatic selection and video switching device.
Background
In the prior art, a plurality of driving cameras exist in the current market, all the driving cameras are used by combining a driving recorder, the left side of a vehicle and the tail part of the vehicle are looked up by a person through the cameras when the person backs the vehicle, and the accident is avoided by judging whether obstacles exist or not. However, this is obviously inconvenient and disadvantageous to safety.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a power supply automatic selection and video switching device to ensure the use safety and convenience.
The embodiment of the invention provides a power supply automatic selection and video switching device, which comprises: the device comprises a right side flash lamp detection port for detecting whether a right side flash lamp works, a backup lamp detection port for detecting whether the backup lamp works, a single chip microcomputer, a normally open switch, a normally closed switch, a power supply, a first camera, a second camera, an electronic switch, a video signal output end, an ACC management circuit and an ACC output end; wherein,
the single chip microcomputer comprises 4 ports which are respectively a first port, a second port, a third port and a fourth port;
the right flash lamp detection port is connected with the first port; the backup lamp detection port is connected with the second port;
the third port is connected with the ACC management circuit; the ACC management circuit is connected with the ACC output end;
the fourth port is connected with the electronic switch, the normally open switch and the normally closed switch;
the normally open switch is connected with the power supply; the power supply is connected with the normally closed switch;
the normally open switch is connected with the first camera; the first camera is connected with the electronic switch;
the normally closed switch is connected with the second camera; the second camera is connected with the electronic switch;
the electronic switch is connected with the video signal output end;
when the right flash lamp is detected to work, the right flash lamp detection port outputs a high level signal; when the right flash lamp is detected to be out of work, the right flash lamp detection port outputs a low level signal;
when the backup lamp is detected to work, the backup lamp detection port outputs a high-level signal; when detecting that the backup lamp does not work, the backup lamp detection port outputs a low-level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera stops working; the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works;
the single chip microcomputer controls the signal output of the third port and the signal output of the fourth port according to the signal input of the first port and the signal input of the second port, so that the signals of the camera realize control without priority circulation; the single chip microcomputer is also used for carrying out time delay processing on the flash lamp pulse voltage detected by the first port, so that when the right flash lamp works, the first port detects a stable time delay high-level signal.
In a specific embodiment, when the first port and the second port both detect a low level signal, the third port and the fourth port both output a low level signal at the same time;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
In a specific embodiment, when the first port detects that the signal changes from a low level signal to a high level signal, and the second port detects that the signal keeps the low level, the third port and the fourth port output high level signals at the same time;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
In a specific embodiment, when the first port detects that a high level signal is kept and the second port detects that a low level signal changes into a high level signal, the third port outputs a high level signal; the fourth port outputs a low level signal;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
In a specific embodiment, when the first port detects a high signal after detecting a low signal for more than 100-; the fourth port outputs a high level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
In a specific embodiment, the electronic switch is used for switching on the signal channel of the second camera if the fourth port is at a low level, and switching on the signal channel of the first camera if the fourth port is at a high level; the electronic switch is specifically the SPDT CMOS switch.
In a specific embodiment, when the ACC management circuit receives a low signal, the ACC management circuit outputs the low signal to the ACC output;
when the ACC management circuit receives a high level signal, the ACC management circuit outputs the high level signal to the ACC output terminal.
In a specific embodiment, the normally open switch comprises: the circuit comprises a first triode, a first field effect transistor, a first resistor, a first capacitor, a second capacitor and a third capacitor; wherein,
the base electrode of the first triode is connected with the fourth port; the emitting electrode of the first triode is grounded; a collector of the first triode is connected with one end of a first resistor and a GATE end of the first field effect transistor;
the other end of the first resistor is connected with a SOURCE end of the first field effect transistor; the SOURCE end of the first field effect transistor is connected with one end of the first capacitor and an external power supply; the DRAIN end of the first field effect transistor is connected with one end of the second capacitor, one end of the third capacitor and the first camera;
the other end of the first capacitor is grounded; the other end of the second capacitor is grounded; the other end of the third capacitor is grounded.
In a specific embodiment, the normally closed switch comprises: the second field effect transistor, the second resistor, the fourth capacitor, the fifth capacitor and the sixth capacitor; wherein,
one end of the second resistor is grounded; the other end of the second resistor is connected with a GATE end of the second field effect transistor;
the GATE end of the second field effect transistor is connected with the fourth port; the DRAIN end of the second field effect transistor is connected with one end of the fifth capacitor, one end of the sixth capacitor and the second camera; the SOURCE end of the second field effect transistor is connected with one end of the fourth capacitor and an external power supply;
the other end of the fourth capacitor is grounded; the other end of the fifth capacitor is grounded; the other end of the sixth capacitor is grounded.
In a specific embodiment, the ACC management circuit includes: the circuit comprises a third resistor, a second triode, a third triode, a fourth resistor, a fifth resistor, a sixth resistor, a seventh capacitor and an eighth capacitor; wherein,
one end of the third resistor is connected with the third port; the other end of the third resistor is connected with the base electrode of the second triode and one end of the seventh capacitor;
the other end of the seventh capacitor is grounded;
the emitter of the second triode is grounded; a collector of the second triode is connected with one end of the fourth resistor, one end of the fifth resistor and a base of the third triode;
the other end of the fourth resistor is connected with an external 12V power supply; the other end of the fifth resistor is connected with an external USB power supply;
the emitter of the third triode is grounded; a collector of the third triode is connected with one end of the sixth resistor, one end of the seventh resistor, one end of the eighth capacitor and an ACC output end;
the other end of the sixth resistor is connected with an external 12V power supply, and the other end of the seventh resistor is connected with an external USB power supply;
the other end of the eighth capacitor is grounded.
Therefore, the embodiment of the invention provides a power supply automatic selection and video switching device, wherein the device comprises: the device comprises a right side flash lamp detection port for detecting whether a right side flash lamp works, a backup lamp detection port for detecting whether the backup lamp works, a single chip microcomputer, a normally open switch, a normally closed switch, a power supply, a first camera, a second camera, an electronic switch, a video signal output end, an ACC management circuit and an ACC output end; the single chip microcomputer comprises 4 ports which are a first port, a second port, a third port and a fourth port respectively; the right flash lamp detection port is connected with the first port; the backup lamp detection port is connected with the second port; the third port is connected with the ACC management circuit; the ACC management circuit is connected with the ACC output end; the fourth port is connected with the electronic switch, the normally open switch and the normally closed switch; the normally open switch is connected with the power supply; the power supply is connected with the normally closed switch; the normally open switch is connected with the first camera; the first camera is connected with the electronic switch; the normally closed switch is connected with the second camera; the second camera is connected with the electronic switch; the electronic switch is connected with the video signal output end; when the right flash lamp is detected to work, the right flash lamp detection port outputs a high level signal; when the right flash lamp is detected to be out of work, the right flash lamp detection port outputs a low level signal; when the backup lamp is detected to work, the backup lamp detection port outputs a high-level signal; when detecting that the backup lamp does not work, the backup lamp detection port outputs a low-level signal; the normally closed switch is in a closed state when receiving a high level signal, so that the second camera stops working; the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works; the single chip microcomputer controls the signal output of the third port and the signal output of the fourth port according to the signal input of the first port and the signal input of the second port, so that the signals of the camera realize control without priority circulation; the single chip microcomputer is also used for carrying out time delay processing on the flash lamp pulse voltage detected by the first port, so that when the right flash lamp works, the first port detects a stable time delay high-level signal. Therefore, convenient and fast operation is realized, the use safety is ensured, pictures on two sides can be conveniently switched when backing or preparing to drive, and the conditions of the other side and the tail side of the automobile can be simultaneously consulted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an automatic power selection and video switching apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an automatic power selection and video switching apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a normally open switch according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a normally closed switch according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ACC management circuit according to an embodiment of the present invention.
Description of the figures
1: right side flash detection port 2: backup lamp detection port
3: the single chip microcomputer 31: first port 32: second port 33: third port
34: fourth port
4: normally open switch 41: first transistor 42: first field-effect transistor 43: a first resistor
44: first capacitance 45: second capacitance 46: third capacitor
5: normally closed switch 51: second field-effect transistor 52: second resistor 53: fourth capacitor
54: fifth capacitance 55: sixth capacitor
6: the power supply 7: first camera 8: second camera
9: the electronic switch 10: video signal output terminal
11: the ACC management circuit 111: third resistance 112: second triode
113: third transistor 114: fourth resistor 115: fifth resistor
116: sixth resistor 117: seventh resistor 118: seventh capacitor
119: eighth capacitor
12: ACC output terminal
Detailed Description
Various embodiments of the present disclosure will be described more fully hereinafter. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather, the disclosure is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.
Hereinafter, the term "includes" or "may include" used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present disclosure, the terms "comprising," "having," and their derivatives, are intended to be only representative of the particular features, integers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to one or more other features, integers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the disclosure, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The term "user" used in various embodiments of the present disclosure may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).
The terminology used in the various embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in various embodiments of the present disclosure.
Example 1
Embodiment 1 of the present invention discloses a video switching apparatus, as shown in fig. 1, including: the device comprises a right-side flash lamp detection port 1 for detecting whether a right-side flash lamp works, a backup lamp detection port 2 for detecting whether the backup lamp works, a single chip microcomputer 3, a normally open switch 4, a normally closed switch 5, a power supply 6, a first camera 7, a second camera 8, an electronic switch 9, a video signal output end 10, an ACC management circuit 11 and an ACC output end 12; wherein,
the single chip microcomputer 3 comprises 4 ports, namely a first port 31, a second port 32, a third port 33 and a fourth port 34;
the right flash lamp detection port is connected with the first port; the backup lamp detection port is connected with the second port;
the third port is connected with the ACC management circuit; the ACC management circuit is connected with the ACC output end;
the fourth port is connected with the electronic switch, the normally open switch and the normally closed switch;
the normally open switch is connected with the power supply; the power supply is connected with the normally closed switch;
the normally open switch is connected with the first camera; the first camera is connected with the electronic switch;
the normally closed switch is connected with the second camera; the second camera is connected with the electronic switch;
the electronic switch is connected with the video signal output end;
when the right flash lamp is detected to work, the right flash lamp detection port outputs a high level signal; when the right flash lamp is detected to be out of work, the right flash lamp detection port outputs a low level signal;
when the backup lamp is detected to work, the backup lamp detection port outputs a high-level signal; when detecting that the backup lamp does not work, the backup lamp detection port outputs a low-level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera stops working; the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works;
the single chip microcomputer controls the signal output of the third port and the signal output of the fourth port according to the signal input of the first port and the signal input of the second port, so that the signals of the camera realize control without priority circulation; the single chip microcomputer is also used for carrying out time delay processing on the flash lamp pulse voltage detected by the first port, so that when the right flash lamp works, the first port detects a stable time delay high-level signal.
Specifically, the ACC output 12 and the video signal output 10 may be connected to an external display, and only when the ACC output 12 outputs a high level, the display operates normally, and the video signal is displayed under the normal operation of the display. The specific first camera is correspondingly arranged on the right side of the automobile, and the second camera is exclusively arranged on the rear side of the automobile.
Therefore, in a specific control process, when the first port and the second port both detect a low level signal, the third port and the fourth port both output a low level signal at the same time;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
The first port and the second port detect low level signals, which indicates that the corresponding right flashlight and the corresponding backup lamp do not work; in this case, the ACC management circuit outputs a low level signal, and thus the external display does not operate.
Otherwise, when the first port detects that the signal changes from a low level signal to a high level signal (corresponding to the right-side flash lamp being started and starting to operate), and the second port detects that the signal keeps a low level (corresponding to the backup lamp not operating yet), the third port and the fourth port both output high level signals at the same time;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
When the first port detects that a high level signal is kept (corresponding to the continuous work of the right flashlight), and the second port detects that the low level signal is changed into a high level signal (corresponding to the start of the work of the backup light), the third port outputs a high level signal; the fourth port outputs a low level signal;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
And when the first port detects a high level signal (for example, the right side flash lamp is not started to started) after detecting a low level signal exceeding 100-; the fourth port outputs a high level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
Specifically, the electronic switch is configured to conduct the signal channel of the second camera when the fourth port is at a low level, and conduct the signal channel of the first camera when the fourth port is at a high level; as shown in fig. 2, the electronic switch is embodied as the SPDT CMOS switch.
Specifically, when the ACC management circuit receives a low level signal, the ACC management circuit outputs the low level signal to the ACC output terminal;
when the ACC management circuit receives a high level signal, the ACC management circuit outputs the high level signal to the ACC output terminal.
In a specific embodiment, as shown in fig. 3, the normally open switch 4 includes: a first triode 41, a first field effect transistor 42, a first resistor 43, a first capacitor 44, a second capacitor 45 and a third capacitor 46; wherein,
the base electrode of the first triode is connected with the fourth port; the emitting electrode of the first triode is grounded; a collector of the first triode is connected with one end of a first capacitor and a GATE end of the first field effect transistor;
the other end of the first resistor is connected with a SOURCE end of the first field effect transistor; the SOURCE end of the first field effect transistor is connected with one end of the first capacitor and an external power supply; the DRAIN end of the first field effect transistor is respectively connected with one end of the second capacitor, one end of the third capacitor and the first camera;
the other end of the first capacitor is grounded; the other end of the second capacitor is grounded; the other end of the third capacitor is grounded.
Specifically, as shown in fig. 4, the normally closed switch 5 includes: a second field effect transistor 51, a second resistor 52, a fourth capacitor 53, a fifth capacitor 54, and a sixth capacitor 55; wherein,
one end of the second resistor is grounded; the other end of the second resistor is connected with a GATE end of the second field effect transistor;
the GATE end of the second field effect transistor is connected with the fourth port; the DRAIN end of the second field effect transistor is connected with one end of the fifth capacitor, one end of the sixth capacitor and the second camera; the SOURCE end of the second field effect transistor is connected with one end of the fourth capacitor and an external power supply;
the other end of the fourth capacitor is grounded; the other end of the fifth capacitor is grounded; the other end of the sixth capacitor is grounded.
In a specific embodiment, as shown in fig. 5, the ACC management circuit 11 includes: a third resistor 111, a second triode 112, a third triode 113, a fourth resistor 114, a fifth resistor 115, a sixth resistor 116, a seventh resistor 117, a seventh capacitor 118 and an eighth capacitor 119; wherein,
one end of the third resistor is connected with the third port; the other end of the third resistor is connected with the base electrode of the second triode and one end of the seventh capacitor;
the other end of the seventh capacitor is grounded;
the emitter of the second triode is grounded; a collector of the second triode is connected with one end of the fourth resistor, one end of the fifth resistor and a base of the third triode;
the other end of the fourth resistor is connected with an external 12V power supply; the other end of the fifth resistor is connected with an external USB power supply;
the emitter of the third triode is grounded; a collector of the third triode is connected with one end of the sixth resistor, one end of the seventh resistor, one end of the eighth capacitor and an ACC output end;
the other end of the sixth resistor is connected with an external 12V power supply, and the other end of the seventh resistor is connected with an external USB power supply;
the other end of the eighth capacitor is grounded.
In a specific embodiment, the single chip microcomputer is further configured to perform delay processing on the flash lamp pulse voltage detected by the first port, so that when the right flash lamp works, the first port detects a stable delay high-level signal.
Thus, as shown in fig. 2, IO _1 is a right flash detection port (i.e., a first port); IO _2 is a backup light detection port (i.e. a second port) and the following description is a continuous operation principle:
because the power supply of the automobile right side flash lamp is pulse voltage, when IO _1 detects the pulse voltage of the automobile right side flash lamp under any condition, the state of IO _1 is delayed for 800-3000 milliseconds inside the single chip microcomputer, so that IO _1 can detect a stable delayed high level when the right side flash lamp works. Specifically, the right side flash lamp can be turned on when the automobile is started, and the backup lamp can be turned on when the automobile is backed, so that the starting and the backing are monitored).
When IO _1 and IO _2 are detected to be low level, IO _3 (corresponding to a third port) and IO _4 (corresponding to a fourth port) of the MCU output to be low level, at this time (ACC output management circuit) outputs low level to (ACC _ OUT), (normally closed switch) is in on output state, (camera 2) works, (camera 2) signal passes through (signal output 2) and is output to (AV-OUT) through an electronic switch, (normally open switch) is in off state, (camera 1) does not work, (signal output 1) and (AV-OUT) are disconnected.
When IO _1 is at a high level (i.e. IO _2 still maintains a low level) in the above state, IO _3 and IO _4 are simultaneously output at a high level, at this time, (ACC output management circuit) outputs a high level to (ACC _ OUT), (normally closed switch) is closed to stop (camera 2) from working, and (normally open switch) is turned on to electrify (camera 1) for working, and (camera 1) signal passes through (signal output 1) and is output to (AV _ OUT) through an electronic switch.
When the high level is detected (i.e. IO _1 is high level) at this time (IO _2), IO _3 of the MCU keeps outputting high level, IO _4 outputs low level,
in the above state, if the high level is detected again when the low level exceeding 800-3000 milliseconds is detected by (IO _1) (IO _2 is kept at the high level at this time), then the high level output is kept by (IO _3) and the high level output by (IO _4), thereby realizing the output control of the camera signal without priority loop.
Has the following characteristics: the novel video switching device is small in size, convenient to install, use, upgrade and update, capable of reducing power consumption of the camera for the power source by utilizing the switching of the single chip microcomputer for the power source and signals, capable of avoiding the power consumption problem of docking equipment, large in working voltage range, accurate in ACC control video switching time, capable of controlling ACC output through the single chip microcomputer, and capable of effectively avoiding interference influence on video signals due to power pulses.
Example 2
Embodiment 2 of the present invention further provides an automobile including the power automatic selection and video switching apparatus described in embodiment 1.
Therefore, an embodiment of the present invention provides an apparatus for automatically selecting a power supply and switching a video, including: the device comprises a right side flash lamp detection port for detecting whether a right side flash lamp works, a backup lamp detection port for detecting whether the backup lamp works, a single chip microcomputer, a normally open switch, a normally closed switch, a power supply, a first camera, a second camera, an electronic switch, a video signal output end, an ACC management circuit and an ACC output end; the single chip microcomputer comprises 4 ports which are a first port, a second port, a third port and a fourth port respectively; the right flash lamp detection port is connected with the first port; the backup lamp detection port is connected with the second port; the third port is connected with the ACC management circuit; the ACC management circuit is connected with the ACC output end; the fourth port is connected with the electronic switch, the normally open switch and the normally closed switch; the normally open switch is connected with the power supply; the power supply is connected with the normally closed switch; the normally open switch is connected with the first camera; the first camera is connected with the electronic switch; the normally closed switch is connected with the second camera; the second camera is connected with the electronic switch; the electronic switch is connected with the video signal output end; when the right flash lamp is detected to work, the right flash lamp detection port outputs a high level signal; when the right flash lamp is detected to be out of work, the right flash lamp detection port outputs a low level signal; when the backup lamp is detected to work, the backup lamp detection port outputs a high-level signal; when detecting that the backup lamp does not work, the backup lamp detection port outputs a low-level signal; the normally closed switch is in a closed state when receiving a high level signal, so that the second camera stops working; the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works; and the single chip microcomputer controls the signal output of the third port and the signal output of the fourth port according to the signal input of the first port and the signal input of the second port, so that the signals of the camera realize the control without priority circulation. Therefore, convenient and fast operation is realized, the use safety is ensured, pictures on two sides can be conveniently switched when backing or preparing to drive, and the conditions of the other side and the tail side of the automobile can be simultaneously consulted.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above-mentioned invention numbers are merely for description and do not represent the merits of the implementation scenarios.
The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. An automatic power selection and video switching apparatus, comprising: the device comprises a right side flash lamp detection port for detecting whether a right side flash lamp works, a backup lamp detection port for detecting whether the backup lamp works, a single chip microcomputer, a normally open switch, a normally closed switch, a power supply, a first camera, a second camera, an electronic switch, a video signal output end, an ACC management circuit and an ACC output end; wherein,
the single chip microcomputer comprises 4 ports which are respectively a first port, a second port, a third port and a fourth port;
the right flash lamp detection port is connected with the first port; the backup lamp detection port is connected with the second port;
the third port is connected with the ACC management circuit; the ACC management circuit is connected with the ACC output end;
the fourth port is connected with the electronic switch, the normally open switch and the normally closed switch;
the normally open switch is connected with the power supply; the power supply is connected with the normally closed switch;
the normally open switch is connected with the first camera; the first camera is connected with the electronic switch;
the normally closed switch is connected with the second camera; the second camera is connected with the electronic switch;
the electronic switch is connected with the video signal output end;
when the right flash lamp is detected to work, the right flash lamp detection port outputs a high level signal; when the right flash lamp is detected to be out of work, the right flash lamp detection port outputs a low level signal;
when the backup lamp is detected to work, the backup lamp detection port outputs a high-level signal; when detecting that the backup lamp does not work, the backup lamp detection port outputs a low-level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera stops working; the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works;
the single chip microcomputer controls the signal output of the third port and the signal output of the fourth port according to the signal input of the first port and the signal input of the second port, so that the signals of the camera realize control without priority circulation; the single chip microcomputer is also used for carrying out time delay processing on the flash lamp pulse voltage detected by the first port, so that when the right flash lamp works, the first port detects a stable time delay high-level signal.
2. The apparatus of claim 1, wherein when both the first port and the second port detect a low signal, both the third port and the fourth port output a low signal at the same time;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
3. The apparatus according to claim 1, wherein when the first port detects a low signal changing to a high signal and the second port detects a low signal, the third port and the fourth port both output a high signal at the same time;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
4. The power auto-selection and video switching apparatus according to claim 1, wherein the third port outputs a high level signal when the first port detects that a high level signal is maintained and the second port detects that a low level signal changes to a high level signal; the fourth port outputs a low level signal;
the normally closed switch is in a conducting state when receiving a low level signal, so that the second camera works; and the normally open switch is in a closed state when receiving a low level signal, so that the first camera stops working.
5. The apparatus as claimed in claim 1, wherein the third port outputs a high level signal when the first port detects a high level signal after detecting a low level signal exceeding 100-; the fourth port outputs a high level signal;
the normally closed switch is in a closed state when receiving a high level signal, so that the second camera does not work; and the normally open switch is in a conducting state when receiving a high level signal, so that the first camera works.
6. The apparatus according to claim 1, wherein the electronic switch is configured to turn on the signal path of the second camera if the fourth port is low, and to turn on the signal path of the first camera if the fourth port is high; the electronic switch is specifically an SPDT CMOS switch.
7. The apparatus of claim 1,
when the ACC management circuit receives a low level signal, the ACC management circuit outputs the low level signal to the ACC output terminal;
when the ACC management circuit receives a high level signal, the ACC management circuit outputs the high level signal to the ACC output terminal.
8. The device of claim 1, wherein the normally open switch comprises: the circuit comprises a first triode, a first field effect transistor, a first resistor, a first capacitor, a second capacitor and a third capacitor; wherein,
the base electrode of the first triode is connected with the fourth port; the emitting electrode of the first triode is grounded; a collector of the first triode is connected with one end of a first resistor and a GATE end of the first field effect transistor;
the other end of the first resistor is connected with a SOURCE end of the first field effect transistor; the SOURCE end of the first field effect transistor is connected with one end of the first capacitor and an external power supply; the DRAIN end of the first field effect transistor is respectively connected with one end of the second capacitor, one end of the third capacitor and the first camera;
the other end of the first capacitor is grounded; the other end of the second capacitor is grounded; the other end of the third capacitor is grounded.
9. The apparatus of claim 1, wherein the normally closed switch comprises: the second field effect transistor, the second resistor, the fourth capacitor, the fifth capacitor and the sixth capacitor; wherein,
one end of the second resistor is grounded; the other end of the second resistor is connected with a GATE end of the second field effect transistor;
the GATE end of the second field effect transistor is connected with the fourth port; the DRAIN end of the second field effect transistor is connected with one end of the fifth capacitor, one end of the sixth capacitor and the second camera; the SOURCE end of the second field effect transistor is connected with one end of the fourth capacitor and an external power supply;
the other end of the fourth capacitor is grounded; the other end of the fifth capacitor is grounded; the other end of the sixth capacitor is grounded.
10. The apparatus of claim 1, wherein the ACC management circuit comprises: the circuit comprises a third resistor, a second triode, a third triode, a fourth resistor, a fifth resistor, a sixth resistor, a seventh capacitor and an eighth capacitor; wherein,
one end of the third resistor is connected with the third port; the other end of the third resistor is connected with the base electrode of the second triode and one end of the seventh capacitor;
the other end of the seventh capacitor is grounded;
the emitter of the second triode is grounded; a collector of the second triode is connected with one end of the fourth resistor, one end of the fifth resistor and a base of the third triode;
the other end of the fourth resistor is connected with an external 12V power supply; the other end of the fifth resistor is connected with an external USB power supply;
the emitter of the second triode is grounded; a collector of the second triode is connected with one end of the sixth resistor, one end of the seventh resistor, one end of the eighth capacitor and an ACC output end;
the other end of the sixth resistor is connected with an external 12V power supply, and the other end of the seventh resistor is connected with an external USB power supply;
the other end of the eighth capacitor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085172.7A CN106780843A (en) | 2017-02-17 | 2017-02-17 | A kind of power supply is automatically selected and video switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085172.7A CN106780843A (en) | 2017-02-17 | 2017-02-17 | A kind of power supply is automatically selected and video switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106780843A true CN106780843A (en) | 2017-05-31 |
Family
ID=58957973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710085172.7A Pending CN106780843A (en) | 2017-02-17 | 2017-02-17 | A kind of power supply is automatically selected and video switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106780843A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234704A (en) * | 2020-10-12 | 2021-01-15 | 维沃移动通信有限公司 | Flash lamp power supply switching circuit, flash lamp control method and electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5530421A (en) * | 1994-04-26 | 1996-06-25 | Navistar International Transportation Corp. | Circuit for automated control of on-board closed circuit television system having side and rear view cameras |
| CN201410919Y (en) * | 2009-06-19 | 2010-02-24 | 高春明 | Real time monitoring device for image around rear side of car |
| US20110194002A1 (en) * | 2010-02-10 | 2011-08-11 | Sony Corporation | Imaging device and power supply control method of imaging device |
| CN202098347U (en) * | 2011-06-14 | 2012-01-04 | 吴建林 | Automobile camera shooting switching controller and automobile camera shooting control system |
| CN104175959A (en) * | 2014-08-28 | 2014-12-03 | 中山市高朗电子有限公司 | 360-degree panoramic parking assistance system |
| CN105128781A (en) * | 2015-07-29 | 2015-12-09 | 深圳市新达共创科技有限公司 | Automobile reversal monitoring system |
| CN205311481U (en) * | 2016-01-12 | 2016-06-15 | 广州路派电子科技有限公司 | Image auxiliary system that backs a car is looked on on -vehicle right side |
-
2017
- 2017-02-17 CN CN201710085172.7A patent/CN106780843A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5530421A (en) * | 1994-04-26 | 1996-06-25 | Navistar International Transportation Corp. | Circuit for automated control of on-board closed circuit television system having side and rear view cameras |
| CN201410919Y (en) * | 2009-06-19 | 2010-02-24 | 高春明 | Real time monitoring device for image around rear side of car |
| US20110194002A1 (en) * | 2010-02-10 | 2011-08-11 | Sony Corporation | Imaging device and power supply control method of imaging device |
| CN202098347U (en) * | 2011-06-14 | 2012-01-04 | 吴建林 | Automobile camera shooting switching controller and automobile camera shooting control system |
| CN104175959A (en) * | 2014-08-28 | 2014-12-03 | 中山市高朗电子有限公司 | 360-degree panoramic parking assistance system |
| CN105128781A (en) * | 2015-07-29 | 2015-12-09 | 深圳市新达共创科技有限公司 | Automobile reversal monitoring system |
| CN205311481U (en) * | 2016-01-12 | 2016-06-15 | 广州路派电子科技有限公司 | Image auxiliary system that backs a car is looked on on -vehicle right side |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234704A (en) * | 2020-10-12 | 2021-01-15 | 维沃移动通信有限公司 | Flash lamp power supply switching circuit, flash lamp control method and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8095714B2 (en) | Electronic device capable of automatically switching between a master mode and a slave mode | |
| CN107274818B (en) | LED display screen control circuit with short circuit detection function and control method | |
| US20210027690A1 (en) | Control circuit, display apparatus, and control method for control circuit | |
| US8736752B2 (en) | Imaging device and power supply control method of imaging device | |
| US20160049802A1 (en) | Transmission device and control method thereof | |
| KR102552625B1 (en) | Control circuit, liquid crystal display driving module and liquid crystal display device | |
| CN106780843A (en) | A kind of power supply is automatically selected and video switching device | |
| CN109286220B (en) | Charging circuit, charging processing method, electronic device, and storage medium | |
| US9966757B2 (en) | Over-voltage protection circuit and electronic device | |
| CN206431705U (en) | A kind of power supply is automatically selected and video switching device | |
| CN108811279B (en) | Flash lamp driving method and electronic equipment | |
| US8879229B2 (en) | Display panel driver circuit and overheat protection device thereof | |
| CN207965806U (en) | System and electronic equipment are restarted in power supply | |
| US20030026615A1 (en) | Image signal processor | |
| KR101479076B1 (en) | Discharging control device and indoor junction box, and discharging control method | |
| CN217216733U (en) | Camera switching circuit and camera system | |
| US11202033B2 (en) | Image sensor and transmission system with collision detection based on state of collision detection line | |
| US8996894B2 (en) | Method of booting a motherboard in a server upon a successful power supply to a hard disk driver backplane | |
| US20170153690A1 (en) | Method for saving energy and electronic device using the same | |
| CN108259826A (en) | The image acquisition transmission system of multiple images is shown in same picture | |
| CN211831257U (en) | True and false flash compatible flash circuit and terminal equipment | |
| US8600225B2 (en) | Electronic device, connection detection method and connection detection system | |
| US10262513B1 (en) | Light emitting device | |
| US10305302B2 (en) | Apparatus for controlling power mode of battery pack | |
| CN111865281B (en) | Startup and shutdown control circuit of automobile ADAS equipment |
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 | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20240628 |
|
| AD01 | Patent right deemed abandoned |