Device for supplying power to vehicle-mounted optical fiber camera by utilizing millimeter waves

Abstract

The invention provides a device for supplying power to a vehicle-mounted optical fiber camera by using millimeter waves, and relates to the technical field of power supply of vehicle-mounted cameras. The system comprises a first optical transceiver located at a terminal, a second optical transceiver located at a vehicle-mounted optical fiber camera end, a first light wave millimeter wave splitter, a second light wave millimeter wave splitter, a millimeter wave generation assembly, a millimeter wave rectification assembly and a DC-DC circuit. According to the invention, the light wave and the millimeter wave are combined into one path by using the light wave and millimeter wave splitter at the transmitting end and are coupled into the dielectric waveguide, the light wave and the millimeter wave are separated from the dielectric waveguide by using the light wave and millimeter wave splitter at the receiving end, and the light wave is in data communication with the light receiver. After resonance and rectification, the millimeter waves are sent to a post-stage DC-DC circuit for further voltage stabilization to supply power to the camera, thereby realizing power supply to the vehicle-mounted optical fiber camera, replacing a copper cable for power supply, and simplifying the arrangement circuit of the vehicle-mounted optical fiber camera.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted camera power supply, and in particular to a device for supplying power to a vehicle-mounted optical fiber camera by using millimeter waves. Background Art

[0002] As global warming worsens, the importance of carbon neutrality becomes increasingly prominent. Specifically in the automotive field, reducing the weight of the vehicle has always been an important means to achieve energy conservation, emission reduction and carbon neutrality; currently, the in-vehicle intelligent driving system has developed rapidly and gradually become the standard of major automobile brands. However, the intelligent in-vehicle driving system cannot be separated from the cooperation of the camera, and the fiber optic camera has become the mainstream of the in-vehicle camera.

[0003] Fiber optic cameras use optical fibers instead of copper cables for data transmission, which not only improves the communication rate, but also reduces the weight of the vehicle to a certain extent. However, the power supply of the camera has not yet been separated from the use of copper cables, and one or two copper cables are often required to power the camera. Although fiber optic cameras can use their own optical fiber bundles to transmit information and carry energy. However, the energy conversion efficiency of photoelectric receivers is generally low, generally not exceeding 40%. This requires the energy transmitter to provide energy far greater than the demand. Such high-energy light beams are very likely to cause irreversible damage to the human eye when the optical fiber is accidentally damaged. Electromagnetic waves in the millimeter wave band are not as harmful to the human body as high-energy light bands. They can be used for low-power power transmission and the technology is mature and easy to implement. Based on the above, the present invention provides a device that uses millimeter waves to power a vehicle-mounted fiber optic camera. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device for powering a vehicle-mounted fiber optic camera using millimeter waves, thereby solving the problem of complex wiring layout of the vehicle-mounted fiber optic camera (requiring additional copper wire layout).

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A device for using millimeter waves to power a vehicle-mounted optical fiber camera, comprising:

[0007] A first optical transceiver located at the terminal, and a second optical transceiver located at the vehicle-mounted optical fiber camera end;

[0008] a first optical wave millimeter wave splitter and a second optical wave millimeter wave splitter, wherein a first dielectric waveguide is connected between the first optical wave millimeter wave splitter and the second optical wave millimeter wave splitter, a first optical transceiver is optically connected to the first optical wave millimeter wave splitter, and a second optical transceiver is optically connected to the second optical wave millimeter wave splitter;

[0009] A millimeter wave generating component, wherein the millimeter wave generating component is connected to the first optical wave millimeter wave splitter through a second dielectric waveguide, and the first optical wave millimeter wave splitter combines the millimeter wave generated by the millimeter wave generating component with the optical wave generated by the first optical transceiver, and transmits the combined combination through the first dielectric waveguide;

[0010] A millimeter wave rectifying component, wherein the millimeter wave rectifying component is connected to the second optical wave millimeter wave splitter through a second dielectric waveguide, the second optical wave millimeter wave splitter receives the light and millimeter wave combined signal transmitted from the first dielectric waveguide, separates the optical wave from the millimeter wave, transmits the millimeter wave to the millimeter wave rectifying component, and transmits the optical wave to the second optical transceiver;

[0011] The DC-DC circuit is electrically connected to the millimeter wave rectifier component, and the DC-DC circuit is used to power the vehicle-mounted fiber optic camera.

[0012] The first dielectric waveguide can transmit millimeter waves and optical waves simultaneously, and the second dielectric waveguide can transmit millimeter waves.

[0013] Preferably, the first optical wave millimeter wave splitter comprises:

[0014] A beam splitter prism encapsulated in the housing, wherein a first end of the beam splitter prism corresponds to an end of the first dielectric waveguide, and a second end of the beam splitter prism corresponds to a bifurcated cable assembly;

[0015] The bifurcated cable assembly includes, from inside to outside, a central optical cable, a first cladding layer, an outer ring optical cable, and a second cladding layer.

[0016] Preferably, the second cladding is coated on the outside of the shell of the beam splitter prism, and the outer ring optical cable is located outside the beam splitter prism.

[0017] Preferably, the millimeter wave generating component includes:

[0018] A millimeter wave oscillator and a first resonant cavity, wherein the millimeter wave oscillator is connected to the first resonant cavity via a coaxial cable or a PCB transmission line, and one end of the first resonant cavity is connected to the first optical wave millimeter wave splitter via a second dielectric waveguide.

[0019] Preferably, the millimeter wave rectifying component comprises:

[0020] A millimeter wave rectifier and a second resonant cavity, wherein the millimeter wave rectifier is connected to the second resonant cavity through a coaxial cable or a PCB transmission line, and one end of the second resonant cavity is connected to the second optical wave millimeter wave splitter through a second dielectric waveguide. Preferably, the frequency of the millimeter wave transmitted in the first dielectric waveguide is greater than the main mode frequency in the first dielectric waveguide, and is transmitted in a single-mode mode; the frequency of the optical wave transmitted in the first dielectric waveguide is greater than the millimeter wave frequency, and is transmitted in a multi-mode mode.

[0021] Preferably, the voltage at the output end of the DC-DC circuit is a constant voltage of 5-12V.

[0022] Preferably, the DC-DC circuit supplies power to the second optical transceiver.

[0023] The present invention provides a device for using millimeter waves to power a vehicle-mounted optical fiber camera. It has the following beneficial effects:

[0024] 1. The present invention combines light waves and millimeter waves into one path and combines them into a dielectric waveguide by using a light wave millimeter wave splitter at the transmitting end, and separates light waves and millimeter waves from the dielectric waveguide by using a light wave millimeter wave splitter at the receiving end. The light waves are sent to the optical receiver for data communication, and the millimeter waves are sent to the subsequent DC-DC circuit for further voltage stabilization to power the camera after resonance and rectification. The light waves can be bidirectionally transmitted in the splitter, that is, the transmitting end and the receiving end can be interchangeable, which meets the requirements of bidirectional communication between the camera and the control end such as the intelligent controller, and the millimeter waves are unidirectionally transmitted, from the transmitting end to the receiving end, to realize the power supply to the vehicle-mounted optical fiber camera, thereby being able to replace the copper cable for power supply, and simplifying the layout of the vehicle-mounted optical fiber camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a transmitting end of a device for powering a vehicle-mounted optical fiber camera using millimeter waves, as proposed by the present invention;

[0026] Figure 2 A schematic diagram of a receiving end of a device for powering a vehicle-mounted optical fiber camera using millimeter waves proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of a first optical wave millimeter wave splitter of a device for powering a vehicle-mounted optical fiber camera using millimeter waves proposed by the present invention.

[0028] Among them, 1. first light wave millimeter wave splitter; 101. splitter prism; 102. central optical cable; 103. first cladding; 104. outer ring optical cable; 105. second cladding; 2. first dielectric waveguide; 3. first optical transceiver; 4. first resonant cavity; 5. millimeter wave oscillator; 6. second light wave millimeter wave splitter; 7. second optical transceiver; 8. second resonant cavity; 9. millimeter wave rectifier; 10. DC-DC circuit; 11. optical fiber; 12. second dielectric waveguide; 13. optical fiber; 14. second dielectric waveguide. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1-3 As shown, an embodiment of the present invention provides a device for powering a vehicle-mounted fiber optic camera using millimeter waves, comprising: a first optical transceiver 3 located at a terminal, a second optical transceiver 7 located at an end of the vehicle-mounted fiber optic camera, a first optical wave millimeter wave splitter 1, a second optical wave millimeter wave splitter 6, a millimeter wave generating component, a millimeter wave rectifying component and a DC-DC circuit 10.

[0032] The first optical transceiver 3 is a transmitter and receiver of communication signals, and is connected to the second optical transceiver 7 through the first dielectric waveguide 2. The second optical transceiver 7 is also a transmitter and receiver of communication signals, thereby realizing two-way communication and data transmission between the terminal (display, data processor, intelligent console, etc.) and the vehicle-mounted optical fiber camera end. The first dielectric waveguide 2 is connected between the first optical wave millimeter wave splitter 1 and the second optical wave millimeter wave splitter 6, and the first dielectric waveguide can transmit millimeter waves and optical waves at the same time.

[0033] The first optical transceiver 3 is connected to the first optical wave millimeter wave splitter 1 by optical fiber, and the second optical transceiver 7 is connected to the second optical wave millimeter wave splitter 6 by optical fiber. The first optical wave millimeter wave splitter 1 is used to combine optical wave and millimeter wave signals so that the combined signal is transmitted in the first dielectric waveguide 2. The second optical wave millimeter wave splitter 6 receives the signal at the other end of the first dielectric waveguide and decomposes the signal into optical wave and millimeter wave signals.

[0034] The millimeter wave generating component is connected to the first optical wave millimeter wave splitter 1 through the second dielectric waveguide, and the second dielectric waveguide can transmit millimeter waves. The first optical wave millimeter wave splitter 1 combines the millimeter wave generated by the millimeter wave generating component with the optical wave generated by the first optical transceiver 3, and transmits it through the first dielectric waveguide 2. The millimeter wave rectifying component is connected to the second optical wave millimeter wave splitter 6 through the second dielectric waveguide. The second optical wave millimeter wave splitter 6 receives the combined signal transmitted from the first dielectric waveguide 2, and separates the optical wave and the millimeter wave. The millimeter wave is transmitted to the millimeter wave rectifying component, and the optical wave is transmitted to the second optical transceiver 7.

[0035] The DC-DC circuit 10 is electrically connected to the millimeter wave rectifier component. The DC-DC circuit 10 is used to power the vehicle-mounted fiber optic camera. The DC-DC circuit is used to transform / stabilize the voltage output by the millimeter wave rectifier component.

[0036] The specific principle is as follows: the millimeter wave generating component is arranged on the vehicle body near the power supply position and is powered by the vehicle-mounted power supply. The millimeter wave generating component generates millimeter wave electromagnetic waves. The millimeter wave electromagnetic waves and the light waves generated by the first optical transceiver 3 are combined into the first dielectric waveguide through the first light wave millimeter wave splitter 1. The second light wave millimeter wave splitter 6 decomposes the combined signal into millimeter wave electromagnetic waves and light waves, wherein the light waves are transmitted to the second optical transceiver 7 to realize the optical signal communication between the second optical transceiver 7 and the first optical transceiver 3, and the optical signal communication between the second optical transceiver 7 and the first optical transceiver 3 is bidirectional. The decomposed millimeter wave electromagnetic waves are rectified by the millimeter wave rectifying component and sent to the DC-DC circuit 10 for further voltage stabilization to power the vehicle-mounted optical fiber camera.

[0037] In one embodiment, the first lightwave millimeter wave splitter 1 includes: a beam splitter prism 101 encapsulated inside a shell, the first end of the beam splitter prism 101 corresponds to the end of the first dielectric waveguide 2, the second end of the beam splitter prism 101 corresponds to a forked cable assembly, and the combined signal light passes through the beam splitter prism 101. Since the wavelength of the light wave is short, the angle of refraction is large and it is irradiated on the periphery of the forked cable assembly. The forked cable assembly includes a central optical cable 102, a first cladding 103, an outer ring optical cable 104, and a second cladding 105 from the inside to the outside. The light wave is transmitted through the outer ring optical cable 104, and the outer ring optical cable 104 transmits the optical signal to the second optical transceiver 7. The millimeter wave is transmitted to the meter wave rectifier assembly through the central optical cable 102, and is converted into electrical energy output by the meter wave rectifier assembly.

[0038] In one embodiment, the second cladding 105 is coated on the outside of the shell of the beam splitter prism, and the outer ring optical cable 104 is located outside the beam splitter prism 10 . The light waves are combined and enter the outer ring optical cable 104 after passing through the beam splitter prism 10 .

[0039] In one embodiment, the millimeter wave generating component includes: a millimeter wave oscillator 5 and a first resonant cavity 4 .

[0040] The millimeter wave oscillator 5 is connected to the first resonant cavity 4 through a coaxial cable or a PCB transmission line. One end of the first resonant cavity 4 is connected to the first optical wave millimeter wave splitter 1 through a second dielectric waveguide. The millimeter wave frequency generated by the millimeter wave oscillator 5 needs to match the main mode frequency of the first resonant cavity, so that the first resonant cavity operates at the lowest resonant frequency and filters out other clutter frequency components.

[0041] In one embodiment, the millimeter wave rectification component includes: a millimeter wave rectifier 8 and a second resonant cavity 9.

[0042] The millimeter wave rectifier is connected to the second resonant cavity through a coaxial cable or a PCB transmission line, and one end of the second resonant cavity is connected to the second optical wave millimeter wave splitter through a second dielectric waveguide.

[0043] In one embodiment, the frequency of the millimeter wave transmitted in the first dielectric waveguide is greater than the main mode frequency in the first dielectric waveguide and is transmitted in a single-mode mode; the frequency of the light wave transmitted in the first dielectric waveguide is greater than the millimeter wave frequency and is transmitted in a multi-mode manner.

[0044] In one embodiment, the voltage at the output end of the DC-DC circuit 10 is a constant voltage of 5-12V, which is determined according to specific parameters of the vehicle-mounted optical fiber camera.

[0045] In one embodiment, the DC-DC circuit 10 supplies power to the second optical transceiver 7. The second optical transceiver 7 is arranged near the vehicle-mounted fiber optic camera. The distance between the second optical transceiver 7 and the vehicle-mounted power supply is relatively large, so the DC-DC circuit 10 can also be used to power it.

[0046] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A device for powering a vehicle-mounted optical fiber camera using millimeter waves, comprising: A first optical transceiver located at the terminal, and a second optical transceiver located at the vehicle-mounted optical fiber camera end; It is characterized by further comprising: a first optical wave millimeter wave splitter and a second optical wave millimeter wave splitter, wherein a first dielectric waveguide is connected between the first optical wave millimeter wave splitter and the second optical wave millimeter wave splitter, a first optical transceiver is optically connected to the first optical wave millimeter wave splitter, and a second optical transceiver is optically connected to the second optical wave millimeter wave splitter; A millimeter wave generating component, wherein the millimeter wave generating component is connected to the first optical wave millimeter wave splitter through a second dielectric waveguide, and the first optical wave millimeter wave splitter combines the millimeter wave generated by the millimeter wave generating component with the optical wave generated by the first optical transceiver, and transmits the combined combination through the first dielectric waveguide; A millimeter wave rectifying component, wherein the millimeter wave rectifying component is connected to the second optical wave millimeter wave splitter through a second dielectric waveguide, the second optical wave millimeter wave splitter receives the optical signal transmitted from the dielectric waveguide, separates the optical wave from the millimeter wave, transmits the millimeter wave to the millimeter wave rectifying component, and transmits the optical wave to the second optical transceiver; The DC-DC circuit is electrically connected to the millimeter wave rectifier component, and the DC-DC circuit is used to power the vehicle-mounted fiber optic camera.

2. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The first optical wave millimeter wave splitter comprises: A beam splitter prism encapsulated in the housing, wherein a first end of the beam splitter prism corresponds to an end of the first dielectric waveguide, and a second end of the beam splitter prism corresponds to a bifurcated cable assembly; The bifurcated cable assembly includes, from inside to outside, a central optical cable, a first cladding layer, an outer ring optical cable, and a second cladding layer.

3. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 2, characterized in that: The second cladding is coated on the outside of the shell of the beam splitter prism, and the outer ring optical cable is located on the outside of the beam splitter prism.

4. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The millimeter wave generating component comprises: A millimeter wave oscillator and a first resonant cavity, wherein the millimeter wave oscillator is connected to the first resonant cavity via a coaxial cable or a PCB transmission line, and one end of the first resonant cavity is connected to the first optical wave millimeter wave splitter via a second dielectric waveguide.

5. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The millimeter wave rectifying component comprises: A millimeter wave rectifier and a second resonant cavity, wherein the millimeter wave rectifier is connected to the second resonant cavity via a coaxial cable or a PCB transmission line, and one end of the second resonant cavity is connected to the second optical wave millimeter wave splitter via a second dielectric waveguide.

6. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The first dielectric waveguide can transmit millimeter waves and optical waves simultaneously, and the second dielectric waveguide can transmit millimeter waves.

7. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The frequency of the millimeter wave transmitted in the first dielectric waveguide is greater than the main mode frequency in the first dielectric waveguide, and is transmitted in a single-mode mode; the frequency of the light wave transmitted in the first dielectric waveguide is greater than the millimeter wave frequency, and is transmitted in a multi-mode mode.

8. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The voltage at the output end of the DC-DC circuit is a constant voltage of 5-12V.

9. The device for powering a vehicle-mounted optical fiber camera using millimeter waves according to claim 1, characterized in that: The DC-DC circuit supplies power to the second optical transceiver.

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