CN117615230A - Video camera system - Google Patents

Video camera system Download PDF

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Publication number
CN117615230A
CN117615230A CN202311459275.7A CN202311459275A CN117615230A CN 117615230 A CN117615230 A CN 117615230A CN 202311459275 A CN202311459275 A CN 202311459275A CN 117615230 A CN117615230 A CN 117615230A
Authority
CN
China
Prior art keywords
switching tube
radio frequency
signal
resistor
wake
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
Application number
CN202311459275.7A
Other languages
Chinese (zh)
Inventor
许孝晨
秦自臻
王聪睿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Hikvision Digital Technology Co Ltd
Original Assignee
Hangzhou Hikvision Digital Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hangzhou Hikvision Digital Technology Co Ltd filed Critical Hangzhou Hikvision Digital Technology Co Ltd
Priority to CN202311459275.7A priority Critical patent/CN117615230A/en
Publication of CN117615230A publication Critical patent/CN117615230A/en
Pending legal-status Critical Current

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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
    • H04N23/50—Constructional details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Transceivers (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The application provides a camera system, camera system include built-in RFID subassembly's dome camera, and the dome camera includes casing subassembly, lens subassembly, antenna boom and main circuit board. And the antenna bracket is electrically connected with the RFID component and the antenna through the spring needle, and the longitudinal height of the RFID component is lower than that of the lens bracket and the antenna bracket. The RFID component comprises a radio frequency wake-up circuit, and the radio frequency wake-up circuit is used for sending out a radio frequency instruction signal so as to control the electronic tag to be switched from a low-power consumption state to a working state. According to the method, the RFID component is arranged in the dome camera, the RFID technology is combined with the video monitoring, after the wake-up signal is received, the radio frequency wake-up circuit arranged through the RFID component wakes up the external electronic tag, data communication and photographing are completed, functions of the dome camera are enriched, and the application range is wider.

Description

Video camera system
Technical Field
The present application relates to the field of communications technologies, and in particular, to a camera system.
Background
RFID and video surveillance are currently being implemented as two independent systems. In applications where there are many demands to be used in combination with RFID and video monitoring, there is still room for improvement if RFID technology can be integrated into a camera system in video monitoring.
Disclosure of Invention
The present application provides an improved camera system.
The application provides a camera system, including built-in RFID subassembly's dome, the dome includes:
a housing assembly having a built-in cavity;
the lens assembly comprises a lens support and a lens which is supported by the lens support and can rotate in a pitching mode, wherein the lens support comprises an annular part and two side walls which extend longitudinally along the annular part and are oppositely arranged, the side walls support the lens, and the circumferential edge of the annular part is provided with a notch which is concave in a radial direction;
the antenna bracket comprises a first arc-shaped part which extends horizontally and a second arc-shaped part which extends longitudinally, wherein the first arc-shaped part and the shell component have the same arc center, and the arc length of the first arc-shaped part is larger than that of the opening of the annular part;
the main circuit board is arranged in the built-in cavity and is opposite to the inner surface of the shell component;
the RFID component and the antenna bracket are longitudinally and sequentially arranged in a longitudinal space defined by the notch, wherein the RFID component is electrically connected with the main circuit board through a pin, the RFID component is electrically connected with the antenna through a spring pin, and the longitudinal height of the RFID component is lower than that of the lens bracket and the antenna bracket; the RFID component comprises a radio frequency wake-up circuit, and the radio frequency wake-up circuit is used for sending out a radio frequency instruction signal so as to control an external electronic tag to be switched from a low-power consumption state to a working state.
Optionally, the main circuit board is configured to trigger the radio frequency wake-up circuit to send a radio frequency instruction signal after receiving an instruction that the user instructs the electronic tag to switch to a working state.
Optionally, the radio frequency wake-up circuit includes a signal receiving unit, a signal amplifying unit, a signal transmitting unit and a power supply unit.
Optionally, the signal receiving unit includes:
the signal receiving end and the first switching tube are connected with the signal receiving end, and the first switching tube is connected with the power end and the grounding end; the first switching tube receives a wake-up signal through a signal receiving end, and the on-off of the first switching tube is controlled by the wake-up signal;
the first resistor is connected between the signal receiving end and the first end of the first switching tube;
the second resistor is connected between the power end and the second end of the first switch tube;
the third resistor is connected between the first end and the second end of the first switch tube;
the fourth resistor is connected between the first end of the first switch tube and the grounding end;
the first capacitor is connected between the first end of the first switch tube and the grounding end;
the first switching tube is an NPN triode.
Optionally, the signal amplifying unit includes:
the second switching tube is connected with the first switching tube and the power end, the third switching tube is connected with the first switching tube and the grounding end, and the on-off of the second switching tube and the third switching tube is controlled by the on-off of the first switching tube;
the fifth resistor is connected between the second end of the first switching tube and the first end of the second switching tube; the second end of the first switch tube is connected with the first end of the third switch tube;
the sixth resistor and the seventh resistor are connected between the second end of the second switching tube and the second end of the third switching tube;
the second switch tube is an NPN triode;
the third switching tube is a PNP triode.
Optionally, the signal transmitting unit includes:
the connector comprises a first connecting end, a second connecting end, a first test point and a second test point, wherein the first connecting end is connected with the second switch tube and the third switch tube, and the second connecting end is connected with the grounding end; the first test point and the second test point are connected with the transmitting antenna;
the second capacitor is connected between the second connecting end and the grounding end;
the third capacitor is connected between the second connecting end and the grounding end;
a connector; the radio frequency wake-up circuit is integrated on the radio frequency circuit board, and the radio frequency circuit board is connected with the transmitting antenna in a plugging manner through the connector;
the fourth capacitor is connected between the power end and the grounding end;
a connector; the radio frequency wake-up circuit is integrated on the radio frequency circuit board, and the radio frequency circuit board is connected with the transmitting antenna in a plugging manner through the connector.
Optionally, the power supply unit includes a 5V power supply and a fourth capacitor.
Optionally, the signal receiving unit includes a signal receiving end, a first switching tube connected with the signal receiving end, a first resistor and a second resistor, wherein the first switching tube is connected with a power end and a grounding end; the first switching tube receives a wake-up signal through the signal receiving end, and the on-off of the first switching tube is controlled by the wake-up signal; the first resistor is connected between the signal receiving end and the first end of the first switching tube, and the second resistor is connected between the power end and the second end of the first switching tube; the first switch tube is an NPN triode; the signal amplifying unit comprises a second switching tube, a third switching tube and a fifth resistor, wherein the second switching tube is connected with the first switching tube and the power end, the third switching tube is connected with the first switching tube and the grounding end, and the on-off of the second switching tube and the third switching tube is controlled by the on-off of the first switching tube; the second switching tube is an NPN triode, and the third switching tube is a PNP triode; the fifth resistor is connected between the second end of the first switching tube and the first end of the second switching tube, and between the second end of the first switching tube and the first end of the third switching tube.
According to the camera system, the RFID component is arranged in the dome camera, the RFID technology is combined with the video monitoring, after the wake-up signal is received, the radio frequency wake-up circuit arranged through the RFID component wakes up the external electronic tag, data communication and photographing are completed, functions of the dome camera are enriched, and the application range is wider.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic diagram showing the structure of an embodiment of the camera system of the present application.
Fig. 2 shows an exploded view of the camera system shown in fig. 1.
Fig. 3 is a schematic view showing a part of the structure of the camera system shown in fig. 1.
Fig. 4 is a schematic view showing a part of the structure of the camera system shown in fig. 1.
Fig. 5 is a schematic diagram of a view of the radio frequency circuit board of the camera system of fig. 1.
Fig. 6 is a schematic diagram of another view of the radio frequency circuit board of the camera system of fig. 5.
Fig. 7 is a schematic diagram of a further view of the radio frequency circuit board of the camera system of fig. 5.
Fig. 8 is a functional block diagram of one embodiment of a radio frequency wake-up circuit of the camera system of the present application.
Fig. 9 is a circuit diagram of the radio frequency wake-up circuit shown in fig. 8.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
The application provides a camera system capable of solving the problem of too fast power consumption of an electronic tag. The camera system of the present application will be described in detail below with reference to the accompanying drawings. The features of the examples and embodiments described below may be combined with each other without conflict.
Fig. 1 shows a schematic structural diagram of an embodiment of a camera system 1 of the present application. Fig. 2 shows an exploded view of the camera system 1 shown in fig. 1. Fig. 3 is a schematic view showing a part of the structure of the camera system 1 shown in fig. 1. Fig. 4 is a schematic view showing a part of the structure of the camera system 1 shown in fig. 1. Fig. 5 is a schematic structural diagram of a view of the radio frequency circuit board of the camera system 1 shown in fig. 1. Fig. 6 is a schematic structural diagram of another view of the radio frequency circuit board of the camera system 1 shown in fig. 5. Fig. 7 is a schematic structural diagram of a further view of the radio frequency circuit board of the camera system 1 shown in fig. 5. As shown in connection with fig. 1 to 7, the camera system 1 may be a security surveillance camera system. The camera system 1 includes a housing assembly 11, a lens module 12, a main circuit board 13, a radio frequency circuit board 14, and an antenna assembly 15. The lens module 12 is assembled to the housing assembly 11. The main circuit board 13 is assembled to the housing assembly 11. The radio frequency circuit board 14 is assembled on the housing assembly 11 and is connected with the main circuit board 13 in a plugging manner. The housing assembly 11 is used for accommodating the lens module 12, the main circuit board 13, the radio frequency circuit board 14 and the antenna assembly 15. The lens module 12 includes a lens holder 121 and a lens assembly 122 disposed on the lens holder 121. The lens holder 121 is used for fixing the lens assembly 122, and the lens assembly 122 is used for capturing images. The main circuit board 13 is also used for connecting with the lens assembly 122 and controlling and driving the lens assembly 122 to work. The antenna assembly 15 includes an antenna bracket 151 and a transmitting antenna 152 assembled on the antenna bracket 151, the antenna bracket 151 is assembled on the housing assembly 11, and the transmitting antenna 152 is connected with the radio frequency circuit board 14 in a plugging manner. In the above scheme, the camera system 1 is provided with the radio frequency circuit board 14, and the radio frequency circuit board 14 is provided with the wake-up circuit 2, so that the electronic tag can be wake-up after receiving the wake-up signal, the problem that the electronic tag is too fast in power consumption can be solved, the radio frequency technology can be applied to the camera system 1, the camera system 1 can wake-up the other equipment (generally the electronic tag) through the radio frequency wake-up circuit in the radio frequency circuit board 14, then data communication and photographing and shooting are completed, the functions of the camera system 1 are enriched, and the application scene of the camera system 1 is increased.
In the embodiment shown in fig. 2 to 3, the housing assembly 11 includes a bottom case 111 and an upper cover 112 disposed above the bottom case 111, the bottom case 111 and the upper cover 112 are assembled to form a housing cavity 113, and the lens module 12, the antenna assembly 15, the radio frequency circuit board 14 and the main circuit board 13 are assembled in the housing cavity 113. In the present embodiment, the lens module 12 includes a lens holder 121 and a lens assembly 122 assembled to the lens holder 121, and the antenna holder 151 is assembled to a peripheral side of the lens holder 121. When the camera system 1 is assembled, the main circuit board 13 is first assembled in the bottom case 111, and then the radio frequency circuit board 14 is assembled above the main circuit board 13 and is connected with the main circuit board 13 in a plugging manner. Then, the lens holder 121 is assembled to the edge of the bottom case 111, the lens assembly 122 is assembled to the lens holder 121, then, the antenna holder 151 with the transmitting antenna 152 is assembled to the bottom case 111, the antenna holder 151 is assembled to the peripheral side of the lens holder 121, and finally, the upper cover 112 is assembled to the top of the bottom case 111. In the present embodiment, the lens module 12, the antenna assembly 15, the rf circuit board 14 and the main circuit board 13 are fixed in the housing assembly 11 by the fixing member 114. The assembly mode is simple and has good stability.
In the embodiment shown in fig. 2, the bottom case 111 and the upper cover 112 are assembled by a fixing member 114, which may be a fixing member such as a bolt or a latch, and the fixing stability is good. In the embodiment shown in fig. 2, the upper cover 112 is made of plastic. The projection area of the fixing member 114 disposed on the bottom case 111 is staggered from the projection area of the rf circuit board 14 on the bottom case 111, so that the fixing member 114 cannot be located in the vertical projection area of the rf circuit board 14, and metal shielding is avoided, thereby affecting the antenna performance. In the embodiment shown in fig. 2, the projection area of the lens module 12 on the bottom shell 111 is offset from the projection area of the rf circuit board 14 on the bottom shell 111. By the arrangement, the lens module 12 is prevented from overlapping with the vertical projection area of the radio frequency circuit board 14, and signal interference and performance influence are avoided.
In the embodiment shown in fig. 2, the transmitting antenna 152 is disposed on a side of the antenna mount 151 facing the central axis of the housing cavity 113, such as the a-side shown in fig. 2. In the embodiment shown in fig. 2, the transmitting antenna 152 is attached to a side of the antenna mount 151 facing the central axis of the housing cavity 113 by laser technology. The antenna bracket 151 is made of plastic. The antenna is attached to the surface of the antenna stand 151 made of plastic material by an LDS technology (Laser-Direct-structuring technology). So set up, make transmitting antenna 152 more stable, can avoid the interference of inside components and parts, also can save more simultaneously and establish the equipment space, make the structure compacter, small.
In the embodiment shown in fig. 4 to 7, the camera system 1 further comprises an electrical connector for making an electrical connection between the main circuit board 13 and the radio frequency circuit board 14, and between the radio frequency circuit board 14 and the transmitting antenna 152. In the embodiment shown in fig. 1 to 7, the electrical connectors comprise a first electrical connector 161 and a second electrical connector 162, the main circuit board 13 being in plug-in connection with the radio frequency circuit board 14 by means of a plug-in fit of the first electrical connector 161 with the second electrical connector 162.
In some embodiments, one of the first electrical connector 161 and the second electrical connector 162 is a receptacle and the other is a pin. In the embodiment shown in fig. 4, the first electrical connector 161 may be a socket. The second electrical connector 162 may be a pin. The socket is inserted into one side of the main circuit board 13, and the contact pin is inserted into one side of the radio frequency circuit board 14. The main circuit board 13 is in plug-in connection with the radio frequency circuit board 14 through the socket and the pin. The socket is connected with the contact pin in a plugging manner, so that the assembly mode is simple, the electric connection is stable, and the transmission signal is stable and reliable. In other embodiments, the first electrical connector 161 is a pin. The second electrical connector 162 may be a socket. In other embodiments, the first electrical connector 161 and the second electrical connector 162 may be other electrical connectors.
In the embodiment shown in fig. 4, the electrical connectors further comprise a third electrical connector 163, by means of which third electrical connector 163 the radio frequency circuit board 14 is plug-connected to the transmitting antenna 152. In this embodiment, the third connector 163 may be a latch. The radio frequency circuit board 14 is connected with the transmitting antenna 152 in a plug-in connection through a spring pin. The spring needle is connected with the transmitting antenna 152, so that the assembly mode is simple, the electric connection is stable, and the transmission signal is stable and reliable. In other embodiments, the third electrical connector 163 may also be other electrical connectors.
In the embodiment shown in fig. 4, the camera system 1 further comprises at least one support 17, by means of which at least one support 17 the radio frequency circuit board 14 is supported above the main circuit board 13. The supporting piece 17 plays a role in fixing, so that a gap is formed between the radio frequency circuit board 14 and the main circuit board 13, the radio frequency circuit board 14 is prevented from being contacted with the main circuit board 13, and the heat dissipation requirement can be met. In this embodiment, the supporting member 17 may be a supporting member such as a bolt or a fixing pin, and is not limited in this application.
The radio frequency circuit board 14 is provided with a radio frequency wake-up circuit 2 as shown in the embodiment of fig. 8 and 9. The radio frequency wake-up circuit 2 is integrated in the radio frequency circuit board 14. The radio frequency wake-up circuit 2 can wake up the electronic tag after receiving the wake-up signal, and can solve the problem of too fast power consumption of the electronic tag. See in particular figures 8 and 9 below.
Fig. 8 is a functional block diagram of one embodiment of the radio frequency wake-up circuit 2 of the present application. As shown in fig. 8, the radio frequency wake-up circuit 2 includes a power source terminal 201, a signal receiving circuit 202, a signal amplifying circuit 203 and a signal transmitting circuit 204. The power terminal 201 is for connection to a power source. The power source may be a direct current power source. The power supply voltage of the dc power supply was 5V. The signal receiving circuit 202 is connected to the power terminal 201 and is configured to receive a wake-up signal. The signal amplifying circuit 203 is connected to the signal receiving circuit 202 and the power supply terminal 201, and is configured to receive the wake-up signal and amplify the wake-up signal. The signal transmitting circuit 204 is connected to the signal amplifying circuit 203 and the transmitting antenna 152, and is configured to receive the amplified wake-up signal, transmit the amplified wake-up signal to the transmitting antenna 152, and transmit the wake-up signal to the electronic tag 3 through the transmitting antenna 152.
The wake-up signal of the above scheme may be a wake-up signal issued by the controller 18. The controller 18 is provided within the main circuit board 13 as shown in the embodiments of figures 1 to 7 above. In other embodiments, the wake-up signal may be an external electrical signal, not limited in this application. The radio frequency wake-up circuit 2 receives a wake-up signal by the signal receiving circuit 202, the signal amplifying circuit 203 and the signal transmitting circuit 204, receives the wake-up signal by the signal receiving circuit 202, amplifies the wake-up signal by the signal amplifying circuit 203, receives the amplified wake-up signal by the signal transmitting circuit 204, transmits the amplified wake-up signal to the transmitting antenna 152, and transmits the wake-up signal to the electronic tag 3 through the transmitting antenna 152. The electronic tag can be awakened after the awakening signal is received, the problem that the electronic tag is too fast in power consumption can be solved, the circuit structure is simple, the cost is low, and the maintenance is convenient.
Fig. 9 is a circuit diagram of the radio frequency wake-up circuit shown in fig. 8. As shown in fig. 8 and 9, the signal receiving circuit 202 includes a signal receiving terminal SHD and a first switching tube Q1 connected to the signal receiving terminal SHD, where the first switching tube Q1 is connected to the power source terminal 201 and the ground terminal GND; the first switching tube Q1 receives a wake-up signal through the signal receiving end SHD, and the on-off of the first switching tube Q1 is controlled by the wake-up signal. In this embodiment, the signal receiving terminal SHD is connected to the control terminal of the controller 18. The controller 18 outputs a wake-up signal through the control terminal to control the on-off of the first switching tube Q1.
In the embodiment shown in fig. 9, the first switching transistor Q1 is an NPN transistor. The signal receiving circuit 202 further includes a first resistor R1, and the first resistor R1 is connected between the signal receiving terminal SHD and the first terminal of the first switching tube Q1. In this embodiment, the first end of the first switching tube Q1 is a base. The first resistor R1 is connected between the signal receiving terminal SHD and the base of the first switching tube Q1. The first resistor R1 may be a current limiting resistor, and plays a role in current limiting. In the embodiment shown in fig. 9, the signal receiving circuit 202 further includes a second resistor R2, and the second resistor R2 is connected between the power supply terminal 201 and the second terminal of the first switching tube Q1. In this embodiment, the second end of the first switching tube Q1 is a collector. The second resistor R2 is connected between the power supply terminal 201 and the collector of the first switching tube Q1. The second resistor R2 may be a pull-up resistor, which stabilizes the second terminal of the first switching tube Q1 to the stabilized voltage of the power supply terminal 201. In the embodiment shown in fig. 9, the signal receiving circuit 202 further includes a third resistor R3, and the third resistor R3 is connected between the first end and the second end of the first switch tube Q1. In this embodiment, the first end of the first switching tube Q1 is a base, and the second end is a collector. The third resistor R3 is connected between the base and the collector of the first switching tube Q1. The third resistor R3 may be a bias resistor, which functions to provide a bias current. In the embodiment shown in fig. 9, the signal receiving circuit 202 further includes a fourth resistor R4, and the fourth resistor R4 is connected between the first end of the first switching tube Q1 and the ground GND. In this embodiment, the first end of the first switching tube Q1 is a base. The fourth resistor R4 is connected between the base of the first switching transistor Q1 and the ground GND. The fourth resistor R4 may be a pull-down resistor, which pulls the current of the base of the first switching tube Q1 down to the ground GND. In the embodiment shown in fig. 9, the signal receiving circuit 202 further includes a first capacitor C1, and the first capacitor C1 is connected between the first end of the first switch Q1 and the ground GND. In the present embodiment, the first capacitor C1 is connected between the fourth resistor R4 and the ground GND. The first capacitor C1 acts as a filter.
In the present embodiment, when the wake-up signal output from the controller 18 is a high-level signal, the received high-level signal acts on the first resistor R1 after passing through the first resistor R1, and a current input to the base of the first switching transistor Q1 is formed, so that the collector and emitter paths of the first switching transistor Q1 are formed. When the wake-up signal output from the controller 18 is a low level signal, the current input to the base of the first switching tube Q1 cannot be generated in the first resistor R1, and the collector and the emitter of the first switching tube Q1 are opened.
In the embodiment shown in fig. 9, the signal amplifying circuit 203 includes a second switching tube Q2 and a third switching tube Q3, the second switching tube Q2 is connected to the first switching tube Q1 and the power supply terminal 201, the third switching tube Q3 is connected to the first switching tube Q1 and the ground terminal GND, and the on-off of the second switching tube Q2 and the third switching tube Q3 is controlled by the on-off of the first switching tube Q1. In this embodiment, the on/off of the second switching tube Q2 and the third switching tube Q3 is controlled by the on/off of the first switching tube Q1.
In the embodiment shown in fig. 9, the second switching transistor Q2 is an NPN transistor. In the embodiment shown in fig. 9, the third switching transistor Q3 is a PNP transistor. The signal amplifying circuit 203 further includes a fifth resistor R5, where the fifth resistor R5 is connected between the second end of the first switching tube Q1 and the first end of the second switching tube Q2; and is connected between the second end of the first switching tube Q1 and the first end of the third switching tube Q3. In this embodiment, the second end of the first switching tube Q1 is a collector. The first end of the second switching tube Q2 is a base electrode. The first end of the third switching tube Q3 is a base electrode. The fifth resistor R5 is connected between the collector of the first switching tube Q1 and the base of the second switching tube Q2; and is connected between the collector of the first switching tube Q1 and the base of the third switching tube Q3. The fifth resistor R5 may be a current limiting resistor, and plays a role in current limiting.
In the embodiment shown in fig. 9, the signal amplifying circuit 203 further includes a sixth resistor R6 and a seventh resistor R7, where the sixth resistor R6 and the seventh resistor R7 are connected between the second end of the second switching tube Q2 and the second end of the third switching tube Q3. In this embodiment, the second end of the second switching tube Q2 is an emitter. The second end of the third switching tube Q3 is an emitter. The sixth resistor R6 and the seventh resistor R7 are connected between the emitter of the second switching tube Q2 and the emitter of the third switching tube Q3. The sixth resistor R6 and the seventh resistor R7 may be voltage dividing resistors.
In this embodiment, when the wake-up signal output by the controller 18 is a high level signal and the first switching tube Q1 is on, the fifth resistor R5 cannot generate the current input to the base of the second switching tube Q2 and the base of the third switching tube Q3, so that the emitter and collector of the second switching tube Q2 are open, and the emitter and collector of the third switching tube Q3 are on. At this time, the connection between the sixth resistor R6 and the seventh resistor R7 is at the low level of ground. In this embodiment, when the wake-up signal output by the controller 18 is a low level signal and the first switching tube Q1 is opened, the fifth resistor R5 generates current input to the base of the second switching tube Q2 and the base of the third switching tube Q3, so that the emitter and collector of the second switching tube Q2 are connected, and the emitter and collector of the third switching tube Q3 are opened. At this time, the connection between the sixth resistor R6 and the seventh resistor R7 is at a high level of the 5V power connected to the power supply terminal 201.
In the embodiment shown in fig. 9, the signal transmitting circuit 204 further includes a connector JP1, where the connector JP1 includes a first connection terminal IF1, a second connection terminal IF2, a first test point TP1, and a second test point TP2, the first connection terminal IF1 is connected to the second switching tube Q2 and the third switching tube Q3, and the second connection terminal IF2 is connected to the ground GND. The first test point TP1 and the second test point TP2 are connected to a transmitting antenna. In the embodiment shown in fig. 9, the signal transmitting circuit 204 further includes a second capacitor C2 connected between the second connection terminal IF2 and the ground terminal GND. In the embodiment shown in fig. 9, the signal transmitting circuit 204 further includes a third capacitor C3 connected between the second connection terminal IF2 and the ground terminal GND. In the present embodiment, the first connection terminal IF1 is connected to the connection between the sixth resistor R6 and the seventh resistor R7. The second connection terminal IF2 is connected to the ground terminal GND through the second capacitor C2 and the third capacitor C3. In the present embodiment, the radio frequency circuit board 14 and the transmitting antenna 152 are plug-connected by the connector JP 1. The connector JP1 may be a latch. In the embodiment shown in fig. 9, the radio frequency wake-up circuit further includes a fourth capacitor C4 connected between the power supply terminal 201 and the ground terminal GND. The fourth capacitor C4 acts as a filter.
In this embodiment, when the connection between the sixth resistor R6 and the seventh resistor R7 is at the high level of the 5V power supply, the current is connected from the first test point TP1 of the connector JP1 to the external transmitting antenna 152, and the current flows back to the second test point TP2 of the connector JP1 through the external transmitting antenna 152, at this time, the second capacitor C2 and the third capacitor C3 are charged, and the upper ends of the second capacitor C2 and the third capacitor C3 are positively charged. When the connection between the sixth resistor R6 and the seventh resistor R7 is at the low level of ground, the second capacitor C2 and the third capacitor C3, which are just fully charged, discharge, and current flows from the upper ends of the second capacitor C2 and the third capacitor C3 to the second test point TP2 of the connector JP1, the transmitting antenna 152 connected externally through the current flows back to the first test point TP1 of the connector JP1, and the current is conducted to the connection between the sixth resistor R6 and the seventh resistor R7 through the first test point TP1 of the connector JP1, and then to the ground through the emitter and the collector of the third switching tube Q3.
The radio frequency wake-up circuit 2 may be a low frequency wake-up circuit. By providing the signal receiving circuit 202, the signal amplifying circuit 203, and the signal transmitting circuit 204, the signal receiving circuit 202 receives the wake-up signal, the signal amplifying circuit 203 receives the wake-up signal, amplifies the wake-up signal, and then the signal transmitting circuit 204 receives the amplified wake-up signal, transmits the amplified wake-up signal to the transmitting antenna 152, and transmits the wake-up signal to the electronic tag 3 through the transmitting antenna 152. The electronic tag can be awakened after the awakening signal is received, the problem that the electronic tag is too fast in power consumption can be solved, the circuit structure is simple, the cost is low, and the maintenance is convenient. The low-frequency wake-up circuit can be applied to the camera system 1, so that the camera system can emit a low-frequency wake-up signal, the low-frequency wake-up function of the radio frequency tag is realized, and the functions of the camera system 1 are enriched. Meanwhile, the radio frequency wake-up circuit 2 can wake up the electronic tag 3 when communication with the electronic tag 3 is needed, so that the power consumption of the electronic tag 3 is reduced.
The camera system 1 of the present application may be a dome camera with an RFID component built in, and includes a housing component 11, a lens module 12, an RFID component, an antenna bracket 151, and a main circuit board 13. In this embodiment, the RFID component may be a transmitting antenna 152. The housing assembly 11 has a built-in cavity, which may be a receiving cavity 113. The lens module 12 includes a lens holder 121 and a lens assembly 122 supported by the lens holder 121 and capable of tilting, wherein the lens holder 121 includes an annular portion 1211 and two side walls 1212 extending longitudinally along the annular portion 1211 and disposed opposite to each other, the side walls 1212 support the lens assembly 122, and a circumferential edge of the annular portion 1211 has a radially concave notch 1213. The antenna bracket 151 includes a first arc-shaped portion 1511 extending horizontally and a second arc-shaped portion 1512 extending longitudinally, wherein the first arc-shaped portion 1511 has the same arc center as the housing assembly 11, and the arc length of the first arc-shaped portion 1511 is longer than the arc length of the opening 1213 of the annular portion 1211. The main circuit board 13 is disposed in the built-in cavity (housing cavity 113) and is opposed to the inner surface of the chassis assembly 11. An RFID module and an antenna mount 151 are disposed in sequence longitudinally in a longitudinal space defined by the slit 1213, wherein the RFID module is electrically connected to the main circuit board 13 via a pin, and the RFID module is electrically connected to the antenna mount 151 via a spring pin. The RFID assembly has a longitudinal height lower than the lens holder 121 and the antenna holder 151. Wherein the RFID component comprises a radio frequency wake-up circuit 2. In this embodiment, the RFID component is integrated as a radio frequency circuit board, in which a radio frequency wake-up circuit 2 is provided. The radio frequency wake-up circuit 2 is used for sending out radio frequency instruction signals so as to control the external electronic tag 3 to be switched from a low power consumption state to a working state. The camera system of this application through set up the RFID subassembly at the dome camera, combines RFID technique and video monitoring to use, can wake up outside electronic tags through the radio frequency wake-up circuit that the RFID subassembly set up after receiving the wake-up signal, accomplishes data communication and shoots and make a video recording, has richened the function of dome camera, and application range is wider
In some embodiments, the main circuit board 13 of the camera is configured to trigger the radio frequency wake-up circuit 2 to send a radio frequency command signal after receiving a command that instructs the electronic tag 3 to switch to an operating state. In some embodiments, the radio frequency wake-up circuit 2 comprises a signal receiving unit, a signal amplifying unit, a signal transmitting unit and a power supply unit. The signal receiving unit may be the signal receiving circuit 202. The signal amplifying unit may be the signal amplifying circuit 203. The signal transmitting unit may be the signal transmitting circuit 204. In some embodiments, the signal receiving unit includes a signal receiving terminal SHD and a first switching tube Q1 connected to the signal receiving terminal SHD, where the first switching tube Q1 is connected to the power supply terminal 201 and the ground terminal GND. The first switching tube Q1 receives a wake-up signal through the signal receiving end SHD, and the on-off of the first switching tube Q1 is controlled by the wake-up signal.
In some embodiments, the signal receiving unit includes a first resistor R1, and the first resistor R1 is connected between the signal receiving terminal SHD and the first terminal of the first switching tube Q1. The signal receiving circuit includes a second resistor R2, and the second resistor R2 is connected between the power supply terminal 201 and the second terminal of the first switching tube Q1. The signal receiving circuit includes a third resistor R3, and the third resistor R3 is connected between the first end and the second end of the first switching tube Q1. The signal receiving circuit includes a fourth resistor R4, and the fourth resistor R4 is connected between the first end of the first switching tube Q1 and the ground GND. The signal receiving circuit includes a first capacitor C1, and the first capacitor C1 is connected between a first end of the first switch tube Q1 and the ground GND. The first switching tube Q1 is an NPN triode.
In some embodiments, the signal amplifying unit includes a second switching tube Q2 and a third switching tube Q3, where the second switching tube Q2 is connected to the first switching tube Q1 and the power supply end 201, and the third switching tube Q3 is connected to the first switching tube Q1 and the ground end GND, and the on-off of the second switching tube Q2 and the third switching tube Q3 is controlled by the on-off of the first switching tube Q1. In some embodiments, the signal amplifying unit includes a fifth resistor R5, where the fifth resistor R5 is connected between the second end of the first switching tube Q1 and the first end of the second switching tube Q2; and is connected between the second end of the first switching tube Q1 and the first end of the third switching tube Q3. In some embodiments, the signal amplifying circuit further includes a sixth resistor R6 and a seventh resistor R7, where the sixth resistor R6 and the seventh resistor R7 are connected between the second end of the second switching tube Q2 and the second end of the third switching tube Q3. The second switching transistor Q2 is an NPN transistor. The third switching tube Q3 is a PNP triode.
In some embodiments, the signal transmitting unit includes a connector JP1, where the connector JP1 includes a first connection terminal IF1, a second connection terminal IF2, a first test point TP1, and a second test point TP2, the first connection terminal IF1 is connected to the second switching tube Q2 and the third switching tube Q3, and the second connection terminal IF2 is connected to the ground GND. The first test point TP1 and the second test point TP2 are connected to a transmitting antenna. In some embodiments, the signal transmitting unit includes a second capacitor C2 connected between the second connection terminal IF2 and the ground terminal GND. In some embodiments, the signal transmitting unit includes a third capacitor C3 connected between the second connection terminal IF2 and the ground terminal GND. In some embodiments, the radio frequency wake-up circuit 2 is integrated in a radio frequency circuit board, which is plug-connected with the transmitting antenna via the connector JP 1.
In some embodiments, the radio frequency wake-up circuit 2 further includes a fourth capacitor C4 connected between the power supply terminal 201 and the ground terminal GND. In some embodiments, the power supply unit is composed of a 5V power supply and a fourth capacitor C4 connected to the power supply terminal 201.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (8)

1. A camera system comprising a dome with an RFID component built-in, the dome comprising:
a housing assembly having a built-in cavity;
the lens assembly comprises a lens support and a lens which is supported by the lens support and can rotate in a pitching mode, wherein the lens support comprises an annular part and two side walls which extend longitudinally along the annular part and are oppositely arranged, the side walls support the lens, and the circumferential edge of the annular part is provided with a notch which is concave in a radial direction;
the antenna bracket comprises a first arc-shaped part which extends horizontally and a second arc-shaped part which extends longitudinally, wherein the first arc-shaped part and the shell component have the same arc center, and the arc length of the first arc-shaped part is larger than that of the opening of the annular part;
the main circuit board is arranged in the built-in cavity and is opposite to the inner surface of the shell component;
the RFID component and the antenna bracket are longitudinally and sequentially arranged in a longitudinal space defined by the notch, wherein the RFID component is electrically connected with the main circuit board through a pin, the RFID component is electrically connected with the antenna through a spring pin, and the longitudinal height of the RFID component is lower than that of the lens bracket and the antenna bracket; the RFID component comprises a radio frequency wake-up circuit, and the radio frequency wake-up circuit is used for sending out a radio frequency instruction signal so as to control an external electronic tag to be switched from a low-power consumption state to a working state.
2. The camera system of claim 1, wherein the main circuit board is configured to trigger the radio frequency wake-up circuit to send a radio frequency command signal after receiving a command from a user to instruct the electronic tag to switch to an operating state.
3. The camera system of claim 2, wherein the radio frequency wake-up circuit comprises a signal receiving unit, a signal amplifying unit, a signal transmitting unit, and a power supply unit.
4. A camera system according to claim 3, wherein the signal receiving unit comprises:
the signal receiving end and the first switching tube are connected with the signal receiving end, and the first switching tube is connected with the power end and the grounding end; the first switching tube receives a wake-up signal through a signal receiving end, and the on-off of the first switching tube is controlled by the wake-up signal;
the first resistor is connected between the signal receiving end and the first end of the first switching tube;
the second resistor is connected between the power end and the second end of the first switch tube;
the third resistor is connected between the first end and the second end of the first switch tube;
the fourth resistor is connected between the first end of the first switch tube and the grounding end;
the first capacitor is connected between the first end of the first switch tube and the grounding end;
the first switching tube is an NPN triode.
5. The camera system according to claim 4, wherein the signal amplifying unit includes:
the second switching tube is connected with the first switching tube and the power end, the third switching tube is connected with the first switching tube and the grounding end, and the on-off of the second switching tube and the third switching tube is controlled by the on-off of the first switching tube;
the fifth resistor is connected between the second end of the first switching tube and the first end of the second switching tube; the second end of the first switch tube is connected with the first end of the third switch tube;
the sixth resistor and the seventh resistor are connected between the second end of the second switching tube and the second end of the third switching tube;
the second switch tube is an NPN triode;
the third switching tube is a PNP triode.
6. The camera system according to claim 5, wherein the signal transmitting unit includes:
the connector comprises a first connecting end, a second connecting end, a first test point and a second test point, wherein the first connecting end is connected with the second switch tube and the third switch tube, and the second connecting end is connected with the grounding end; the first test point and the second test point are connected with the transmitting antenna;
the second capacitor is connected between the second connecting end and the grounding end;
the third capacitor is connected between the second connecting end and the grounding end;
a connector; the radio frequency wake-up circuit is integrated on the radio frequency circuit board, and the radio frequency circuit board is connected with the transmitting antenna in a plugging manner through the connector;
the fourth capacitor is connected between the power end and the grounding end;
a connector; the radio frequency wake-up circuit is integrated on the radio frequency circuit board, and the radio frequency circuit board is connected with the transmitting antenna in a plugging manner through the connector.
7. The camera system of claim 6, wherein the power supply unit comprises a 5V power supply and a fourth capacitor.
8. The camera system according to claim 3, wherein the signal receiving unit comprises a signal receiving end, a first switching tube connected with the signal receiving end, a first resistor and a second resistor, and the first switching tube is connected with a power end and a ground end; the first switching tube receives a wake-up signal through the signal receiving end, and the on-off of the first switching tube is controlled by the wake-up signal; the first resistor is connected between the signal receiving end and the first end of the first switching tube, and the second resistor is connected between the power end and the second end of the first switching tube; the first switch tube is an NPN triode; the signal amplifying unit comprises a second switching tube, a third switching tube and a fifth resistor, wherein the second switching tube is connected with the first switching tube and the power end, the third switching tube is connected with the first switching tube and the grounding end, and the on-off of the second switching tube and the third switching tube is controlled by the on-off of the first switching tube; the second switching tube is an NPN triode, and the third switching tube is a PNP triode; the fifth resistor is connected between the second end of the first switching tube and the first end of the second switching tube, and between the second end of the first switching tube and the first end of the third switching tube.
CN202311459275.7A 2023-06-21 2023-06-21 Video camera system Pending CN117615230A (en)

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CN202310744374.3A CN116502667B (en) 2023-06-21 2023-06-21 Radio frequency wake-up circuit and camera system

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CN202795422U (en) * 2012-04-28 2013-03-13 复旦大学无锡研究院 Radio-frequency wake-up circuit for active RFID electronic tags
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CN105913100B (en) * 2016-05-05 2018-12-04 中国石油集团渤海钻探工程有限公司 Downhole intelligent control system and its control method with low frequency wake-up function
CN206481069U (en) * 2016-12-06 2017-09-08 宁德时代新能源科技股份有限公司 Battery sampling integrated chip wake-up circuit and battery energy storage system
CN109519728A (en) * 2018-11-13 2019-03-26 漳州立达信光电子科技有限公司 A kind of intelligent lamp
CN109474853B (en) * 2018-11-27 2021-11-09 深圳Tcl新技术有限公司 Television wake-up circuit and television with same
CN110417258A (en) * 2019-07-05 2019-11-05 珠海格力电器股份有限公司 A kind of Switching Power Supply that ductility limit is controllable
CN110928212B (en) * 2019-09-19 2022-05-10 中兴通讯股份有限公司 Wake-up circuit and wake-up method
CN216751700U (en) * 2021-12-14 2022-06-14 深圳市正浩创新科技股份有限公司 Switching circuit, energy storage equipment and consumer
CN114785375B (en) * 2022-06-14 2022-09-20 长江信达软件技术（武汉）有限责任公司 Radio frequency double-carrier awakening system and method
CN218887501U (en) * 2022-11-08 2023-04-18 浙江宇视科技有限公司 Lens bracket component and dome camera

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