LVDS-COAX signal enhancer and vehicle

Abstract

The present invention discloses an LVDS-COAX signal enhancer and a vehicle. The LVDS-COAX signal enhancer includes a serial addition module and a deserialization module; the deserialization module is connected to an LVDS camera, and the deserialization module is used to deserialize the video signal collected by the LVDS camera; the serial addition module is connected to the deserialization module, and the serial addition module is used to serialize the video signal after deserialization; the serial addition module is connected to a receiver, and the serial addition module is used to transmit the video signal after serial addition to the receiver. The present invention converts the video signal through the serial addition module and the deserialization module to enhance the transmission quality of the signal, solves the problem of excessive signal loss due to the long wiring harness, thereby causing signal distortion, improves the signal quality, and can be applied to large vehicles such as buses and trucks with long bodies.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an LVDS-COAX signal enhancer and a vehicle. Background Art

[0002] In order to enhance the safety of drivers, current cars are equipped with a large number of cameras for use in advanced driver assistance systems, reversing monitoring, panoramic monitoring and other application scenarios. The application of these scenarios inevitably brings about the increase in eye comfort and the requirement for high resolution of machine algorithms. Therefore, cars require higher and higher resolution for cameras, and the increase in resolution inevitably brings about an increase in transmission costs. The most cost-effective video transmission method in the current market is LVDS (Low Voltage Differential Signaling) - COAX. The transmitted signal can be high-fidelity, and its transmission method uses coaxial cables for transmission, with fewer wiring harnesses, so the cost is lower, and therefore it is widely used in the passenger car market.

[0003] The serialization and deserialization chips used in LVDS-COAX transmission currently on the market include TI's FPD-LINK transmission method, MAXIM's GMSL transmission method, and THINE's V-BY-ONE transmission method. However, these transmission methods all have an obvious feature, that is, the maximum transmission distance allowed is about 15m. If the distance exceeds this, either the performance cannot be guaranteed, that is, the signal quality is lost, or a transmission harness with ultra-high quality and no standard requirements is selected. Therefore, so far, it has been limited to the passenger car market with a shorter body, and there is no suitable solution for large vehicles such as buses and trucks with longer bodies and more prone to traffic accidents. Summary of the invention

[0004] The embodiment of the present invention provides an LVDS-COAX signal enhancer, which can solve the problem of excessive signal loss caused by too long a wiring harness, thereby causing signal distortion, improves signal quality, and is suitable for large vehicles such as buses and trucks with long bodies.

[0005] In a first aspect, an embodiment of the present invention provides an LVDS-COAX signal enhancer, including a serial addition module and a deserialization module;

[0006] The deserialization module is connected to the LVDS camera, and the deserialization module is used for deserialization processing of the video signal collected by the LVDS camera;

[0007] The string adding module is connected to the deserializing module, and the string adding module is used for performing string adding processing on the video signal after deserializing processing;

[0008] The string adding module is connected to the receiver, and is used to transmit the video signal after string adding processing to the receiver.

[0009] Optionally, the LVDS-COAX signal enhancer further includes a serializing POC module and a deserializing POC module;

[0010] The input end of the POC module for adding strings is connected to the receiver, the output end of the POC module for adding strings is connected to the input end of the POC module for deserializing strings, and the POC module for adding strings is used to receive the power supply voltage provided by the receiver;

[0011] The output end of the deserialization POC module is connected to the LVDS camera, and the deserialization POC module is used to supply power to the LVDS camera.

[0012] Optionally, the LVDS-COAX signal enhancer also includes a power supply module, the input end of the power supply module is connected to the output end of the string adding POC module, the output end of the power supply module is connected to the deserializing module and the string adding module, and the power supply module is used to supply power to the deserializing module and the string adding module.

[0013] Optionally, the LVDS-COAX signal enhancer further includes a reset module, the reset module is connected to the deserialization module and the string addition module, and the reset module is used to send a reset signal to the deserialization module and the string addition module;

[0014] The reset module is connected to the output end of the power module, and the power module is used to supply power to the reset module.

[0015] Optionally, the string adding module includes a first processing chip and a first isolation capacitor;

[0016] The signal output pin of the first processing chip is connected to the first end of the first isolation capacitor, and the second end of the first isolation capacitor is connected to the receiver;

[0017] The signal input pin of the first processing chip is connected to the deserialization module.

[0018] Optionally, the deserialization module includes a second processing chip and a second isolation capacitor;

[0019] The signal input pin of the second processing chip is connected to the first end of the second isolation capacitor, and the second end of the second isolation capacitor is connected to the LVDS camera;

[0020] The signal output pin of the second processing chip is connected to the string adding module.

[0021] Optionally, the string-adding POC module includes a first magnetic bead;

[0022] The first end of the first magnetic bead is connected to the receiver, and the second end of the first magnetic bead is connected to the input end of the deserializing POC module and the input end of the power module.

[0023] Optionally, the deserialization POC module includes a second magnetic bead;

[0024] The first end of the second magnetic bead is connected to the LVDS camera, and the second end of the second magnetic bead is connected to the output end of the string-adding POC module and the input end of the power module.

[0025] Optionally, the power supply module includes a third processing chip, a first resistor and a second resistor;

[0026] The power input pin of the third processing chip is connected to the output end of the string-added POC module;

[0027] The power output pin of the third processing chip is connected to the deserializing module and the string adding module;

[0028] A first end of the first resistor is connected to a power output pin of the third processing chip, a second end of the first resistor is connected to a first end of the second resistor, and a second end of the second resistor is grounded;

[0029] The first end of the second resistor is connected to a feedback pin of the third processing chip.

[0030] Optionally, the reset module includes a fourth processing chip and a grounding capacitor;

[0031] The power input terminal of the fourth processing chip is connected to the output terminal of the power module;

[0032] The output end of the fourth processing chip is connected to the deserializing module and the string adding module;

[0033] A first end of the grounding capacitor is connected to a power input end of the fourth processing chip, and a second end of the grounding capacitor is grounded.

[0034] In a second aspect, an embodiment of the present invention provides a vehicle, comprising the LVDS-COAX signal enhancer provided in the first aspect of the present invention.

[0035] The LVDS-COAX signal enhancer provided by the embodiment of the present invention includes a serial addition module and a deserialization module, the deserialization module is connected to the LVDS camera, the deserialization module is used to deserialize the video signal collected by the LVDS camera, the serial addition module is connected to the deserialization module, the serial addition module is used to serialize the video signal after deserialization, the serial addition module is connected to the receiver, and the serial addition module is used to transmit the video signal after serial addition to the receiver. The present invention converts the video signal through the serial addition module and the deserialization module to enhance the transmission quality of the signal, solves the problem of excessive signal loss due to the long wiring harness, thereby causing signal distortion, improves the signal quality, and can be applied to large vehicles such as buses and trucks with long bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0037] Figure 1 A schematic diagram of the structure of an LVDS-COAX signal enhancer provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of another LVDS-COAX signal enhancer provided in an embodiment of the present invention;

[0039] Figure 3 A circuit diagram of a string adding module provided by an embodiment of the present invention;

[0040] Figure 4 A circuit diagram of a deserialization module provided in an embodiment of the present invention;

[0041] Figure 5 A circuit diagram of a POC module with a serial connection provided by an embodiment of the present invention;

[0042] Figure 6 A circuit diagram of a deserializing POC module provided by an embodiment of the present invention;

[0043] Figure 7 A circuit diagram of a power module provided by an embodiment of the present invention;

[0044] Figure 8 A circuit diagram of a reset module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0048] The embodiment of the present invention provides a LVDS-COAX signal enhancer. Figure 1 A schematic diagram of the structure of an LVDS-COAX signal enhancer provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the LVDS-COAX signal enhancer includes a serial addition module 110 and a deserialization module 120 .

[0049] The deserialization module 120 is connected to the LVDS camera 200, and the deserialization module 120 is used to deserialize the video signal collected by the LVDS camera 200. The LVDS camera refers to a camera using an LVDS interface. For example, the LVDS camera 200 can be arranged around the vehicle body to collect video information around the vehicle body. The LVDS camera 200 performs serial processing on the collected video information, converting the low-speed parallel signal into a high-speed serial signal. The deserialization module 120 is used to deserialize the serial signal, convert the video signal into a parallel signal, and send it to the serialization module 110.

[0050] The serial adding module 110 is connected to the deserializing module 120 , and the serial adding module 110 is used for performing serial adding processing on the video signal after the deserializing processing, and converting the parallel signal into a serial signal.

[0051] The string adding module 110 is connected to the receiver 300, and is used to transmit the video signal after string adding to the receiver 300. For example, the receiver 300 may be an ECU (Electronic Control Unit) control box or a navigation host.

[0052] The LVDS-COAX signal enhancer provided by the embodiment of the present invention includes a serial addition module and a deserialization module, the deserialization module is connected to the LVDS camera, the deserialization module is used to deserialize the video signal collected by the LVDS camera, the serial addition module is connected to the deserialization module, the serial addition module is used to serialize the video signal after deserialization, the serial addition module is connected to the receiver, and the serial addition module is used to transmit the video signal after serial addition to the receiver. The present invention converts the video signal through the serial addition module and the deserialization module to enhance the transmission quality of the signal, solves the problem of excessive signal loss due to the long wiring harness, thereby causing signal distortion, improves the signal quality, and can be applied to large vehicles such as buses and trucks with long bodies.

[0053] Figure 2 A schematic diagram of the structure of another LVDS-COAX signal enhancer provided in an embodiment of the present invention. In some embodiments of the present invention, Figure 2 As shown, based on the above embodiment, the LVDS-COAX signal enhancer further includes a POC (Power Over Coaxia) module 130 and a POC module 140. The input end of the POC module 130 is connected to the receiver 300 via a coaxial cable, and the output end of the POC module 130 is connected to the input end of the POC module 140, and the POC module 130 is used to receive the power supply voltage provided by the receiver 300. The output end of the POC module 140 is connected to the LVDS camera 200 via a coaxial cable, and the POC module 140 is used to supply power to the LVDS camera 200.

[0054] In this embodiment, the receiver 300 supplies power to the LVDS camera 200 through the POC module 130 and the POC module 140. POC is a technology based on video, coaxial control, and power superposition of coaxial cables. In coaxial cable transmission, high-definition video signals, coaxial signals, and power are transmitted, that is, high-definition video, coaxial signals, and power supply are combined together. This solves the difficulty of integrated wiring and reduces the number of wiring.

[0055] The serial addition POC module 130 is used to filter out the signal part from the receiver 300, isolate the signal from the serial addition module 110, retain the power part, and output a clean power supply voltage to the deserialization POC module 140. The deserialization POC module 140 is used to isolate the signals from the deserialization module 120 and the LVDS camera 200 to avoid affecting the stability of the power supply to the LVDS camera 200.

[0056] Based on the above embodiments, Figure 2 As shown, the LVDS-COAX signal enhancer also includes a power module 150, the input end of the power module 150 is connected to the output end of the string adding POC module 130, the output end of the power module 150 is connected to the deserialization module 120 and the string adding module 110, and the power module 150 is used to supply power to the deserialization module 120 and the string adding module 110. That is, in this embodiment, the receiver 300 supplies power to the deserialization module 120 and the string adding module 110 through the string adding POC module 130 and the power module 150. Exemplarily, the string adding POC module 130 filters out the signal part from the receiver 300, outputs a clean power supply voltage to the power module 150, and the power module 150 converts the power supply voltage into the working voltage required by the deserialization module 120 and the string adding module 110. In this embodiment, the LVDS-COAX signal enhancer is powered by the receiver 300, and there is no need to add an additional power supply, which reduces the cost, reduces the difficulty of integrated wiring, and reduces the number of wiring.

[0057] Based on the above embodiments, Figure 2 As shown, the LVDS-COAX signal enhancer further includes a reset module 160 , which is connected to the deserialization module 120 and the string adding module 110 . The reset module 160 is used to send a reset signal to the deserialization module 120 and the string adding module 110 .

[0058] The reset module 160 is connected to the output end of the power module 150 , and the power module 150 is used to supply power to the reset module 160 .

[0059] After the power module 150 supplies power to the string adding module 110 and the deserializing module 120, because the string adding module 110 and the deserializing module 120 need to perform some parameter configuration, the string adding module 110 and the deserializing module 120 need to be reset after configuration, so the reset module 160 needs to delay (the delay time is about 200ms) to output a low level, reset the string adding module 110 and the deserializing module 120, and then the reset module 160 stably outputs a high level to maintain the normal operation of the string adding module 110 and the deserializing module 120.

[0060] Figure 3 A circuit diagram of a serial adding module provided by an embodiment of the present invention, such as Figure 3 As shown, based on the above embodiment, the string adding module 110 includes a first processing chip U1 and peripheral circuits.

[0061] The signal input pins (DIN2-DIN9) of the first processing chip U1 are connected to the deserialization module 120, and are used to receive the parallel signals input by the deserialization module 120. The first processing chip U1 performs serialization processing on the received parallel signals, converts them into serial signals, and outputs them through the signal output pin (DOUT+) of the first processing chip U1.

[0062] The peripheral circuit of the first processing chip U1 includes a first isolation capacitor C9, a signal output pin (DOUT+) of the first processing chip U1 is connected to a first end of the first isolation capacitor C9, and a second end of the first isolation capacitor C9 is connected to a receiver 300. Exemplarily, the second end of the first isolation capacitor C9 is connected to a coaxial interface LVDS1, and the coaxial interface LVDS1 is connected to the receiver 300 via a coaxial cable. The first isolation capacitor C9 is used to isolate the power supply voltage from the receiver to prevent excessive power supply voltage from damaging the first processing chip U1.

[0063] Exemplarily, the model of the first processing chip U1 is DS90UB913A, and the peripheral circuit of the first processing chip U1 also includes capacitor C7, resistor R9, magnetic bead L9, capacitor C13, capacitor C14, magnetic bead L10, capacitor C16, capacitor C17, magnetic bead L11, capacitor C19, capacitor C20, magnetic bead L12, capacitor C21, and capacitor C22.

[0064] A first end of the capacitor C7 is connected to the signal output pin (DOUT-) of the first processing chip U1 , a second end of the capacitor C7 is connected to a first end of the resistor R9 , and a second end of the resistor R9 is grounded.

[0065] The first end of the magnetic bead L9 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L9 is connected to the phase-locked loop power supply pin (VDDPLL) of the first processing chip U1. The first end of the capacitor C13 is connected to the second end of the magnetic bead L9, and the second end of the capacitor C13 is grounded. The first end of the capacitor C14 is connected to the second end of the magnetic bead L9, and the second end of the capacitor C14 is grounded. The power module 150 provides a phase-locked loop voltage to the first processing chip U1. The magnetic bead L9, the capacitor C13 and the capacitor C14 constitute an LC filter circuit to filter out possible AC signals output by the power module 150.

[0066] The first end of the magnetic bead L10 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L10 is connected to the analog output power supply pin (VDDT) of the first processing chip U1. The first end of the capacitor C16 is connected to the second end of the magnetic bead L10, and the second end of the capacitor C16 is grounded. The first end of the capacitor C17 is connected to the second end of the magnetic bead L10, and the second end of the capacitor C17 is grounded. The power module 150 provides an analog output voltage to the first processing chip U1. The magnetic bead L10, the capacitor C16 and the capacitor C17 constitute an LC filter circuit to filter out the possible AC signal output by the power module 150.

[0067] The first end of the magnetic bead L11 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L11 is connected to the current mode logic power supply pin (VDDCML) of the first processing chip U1. The first end of the capacitor C19 is connected to the second end of the magnetic bead L11, and the second end of the capacitor C19 is grounded. The first end of the capacitor C20 is connected to the second end of the magnetic bead L11, and the second end of the capacitor C20 is grounded. The power module 150 provides the current mode logic power supply and the bidirectional channel driving power supply to the first processing chip U1. The magnetic bead L11, the capacitor C19 and the capacitor C20 constitute an LC filter circuit to filter out the possible AC signal output by the power module 150.

[0068] The first end of the magnetic bead L12 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L12 is connected to the digital power supply pin (VDDD) of the first processing chip U1. The first end of the capacitor C21 is connected to the second end of the magnetic bead L12, and the second end of the capacitor C21 is grounded. The first end of the capacitor C22 is connected to the second end of the magnetic bead L12, and the second end of the capacitor C22 is grounded. The power module 150 provides digital power to the first processing chip U1. The magnetic bead L12, the capacitor C21 and the capacitor C22 constitute an LC filter circuit to filter out possible AC signals output by the power module 150.

[0069] Exemplarily, the peripheral circuit of the first processing chip U1 further includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a magnetic bead L18, a capacitor C10, and a capacitor C11.

[0070] The first end of the resistor R12 is connected to the output end (VDD_1.8V) of the power module 150, the second end of the resistor R12 is connected to the first end of the resistor R13, the second end of the resistor R13 is grounded, and the first end of the resistor R13 is connected to the MODE pin of the first processing chip U1.

[0071] The first end of the resistor R14 is connected to the output end (VDD_1.8V) of the power module 150, the second end of the resistor R14 is connected to the first end of the resistor R15, the second end of the resistor R15 is grounded, and the first end of the resistor R15 is connected to the ID pin of the first processing chip U1.

[0072] The first end of the magnetic bead L18 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L18 is connected to the VDDIO pin of the first processing chip U1. The first end of the capacitor C10 is connected to the second end of the magnetic bead L18, and the second end of the capacitor C10 is grounded. The first end of the capacitor C11 is connected to the second end of the magnetic bead L18, and the second end of the capacitor C11 is grounded.

[0073] The first end of the resistor R10 is connected to the VDDIO pin of the first processing chip U1, and the second end of the resistor R10 is connected to the SDA pin of the first processing chip U1. The first end of the resistor R11 is connected to the VDDIO pin of the first processing chip U1, and the second end of the resistor R11 is connected to the SCL pin of the first processing chip U1.

[0074] Figure 4 A circuit diagram of a deserialization module provided by an embodiment of the present invention, such as Figure 4 As shown, based on the above embodiment, the deserialization module 120 includes a second processing chip U2 and peripheral circuits.

[0075] The peripheral circuit of the second processing chip U2 includes a second isolation capacitor C41, a first end of the second isolation capacitor C41 is connected to the signal input pin (RIN1+) of the second processing chip U2, and a second end of the second isolation capacitor C41 is connected to the LVDS camera 200. Specifically, exemplarily, the second end of the second isolation capacitor C41 is connected to the coaxial interface LVDS2, and the coaxial interface LVDS2 is connected to the LVDS camera 200 through a coaxial cable. The second isolation capacitor C41 is used to isolate the power supply voltage from the deserialization POC module 140 to prevent the second processing chip U2 from being damaged by an excessively high power supply voltage.

[0076] The second processing chip U2 receives the serial signal from the LVDS camera 200 and deserializes the serial signal to obtain a parallel signal. The signal output pins (ROUT[2]-ROUT[9]) of the second processing chip U2 are respectively connected to the signal input pins (DIN2-DIN9) of the first processing chip U1, for sending parallel signals to the first processing chip U1.

[0077] The HSYNC pin, VSYNC pin, PCLK pin, GPIO[0]-GPIO[3] pin, SDA pin, and SCL pin of the second processing chip U2 are respectively connected to the HSYNC pin, VSYNC pin, PCLK pin, GPIO[0]-GPIO[3] pin, SDA pin, and SCL pin of the first processing chip U1.

[0078] Exemplarily, the model of the second processing chip U2 is DS90UB914A, and its peripheral circuit further includes a resistor R31, a light-emitting diode D1, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R41 and a resistor R42.

[0079] The first end of the resistor R31 is connected to the LOCK pin of the second processing chip U2, the second end of the resistor R31 is connected to the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is grounded. When the phase-locked loop inside the second processing chip U2 is in a locked state, the LOCK pin outputs a high level, and the light emitting diode D1 is lit. When the phase-locked loop inside the second processing chip U2 is in an unlocked state, the LOCK pin outputs a low level, and the light emitting diode D1 is extinguished.

[0080] The first end of the resistor R34 is connected to the IDx[0] pin of the second processing chip U2, and the second end of the resistor R34 is grounded. The first end of the resistor R35 is connected to the IDx[1] pin of the second processing chip U2, and the second end of the resistor R35 is grounded.

[0081] The first end of the resistor R36 is connected to the SEL pin of the second processing chip U2, and the second end of the resistor R36 is grounded. The first end of the resistor R37 is connected to the BISTEN pin of the second processing chip U2, and the second end of the resistor R37 is grounded. The first end of the resistor R38 is connected to the OSS_SEL pin of the second processing chip U2, and the second end of the resistor R38 is grounded. The first end of the resistor R39 is connected to the OEN pin of the second processing chip U2, and the second end of the resistor R39 is grounded.

[0082] The first end of the resistor R41 is connected to the output end (VDD_1.8V) of the power module 150, the second end of the resistor R41 is connected to the first end of the resistor R42, and the second end of the resistor R42 is grounded. The first end of the resistor R42 is connected to the MODE pin of the second processing chip U2.

[0083] Exemplarily, the peripheral circuit of the second processing chip U2 also includes resistor R40, capacitor C40, magnetic bead L13, capacitor C23, capacitor C24, capacitor C25, magnetic bead L14, capacitor C27, capacitor C28, capacitor C29, magnetic bead L15, capacitor C31, capacitor C32, capacitor C33, magnetic bead L16, capacitor C35 and capacitor C36.

[0084] A first end of the capacitor C40 is connected to the RIN1-pin of the second processing chip U2, a second end of the capacitor C40 is connected to a first end of the resistor R40, and a second end of the resistor R40 is grounded.

[0085] The first end of the magnetic bead L13 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L13 is connected to the VDDD pin and the VDDSSCG pin of the second processing chip U2. The first ends of the capacitors C23, C24, and C25 are all connected to the second end of the magnetic bead L13, and the second ends of the capacitors C23, C24, and C25 are all grounded. The magnetic bead L13, the capacitor C23, the capacitor C24, and the capacitor C25 form an LC filter circuit to filter out possible AC signals output by the power module 150.

[0086] The first end of the magnetic bead L14 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L14 is connected to the VDDIO

[01] -VDDIO

[03] pins of the second processing chip U2. The first ends of the capacitors C27, C28, and C29 are all connected to the second end of the magnetic bead L14, and the second ends of the capacitors C27, C28, and C29 are all grounded. The magnetic bead L14, the capacitors C27, C28, and C29 form an LC filter circuit to filter out possible AC signals output by the power module 150.

[0087] The first end of the magnetic bead L15 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L15 is connected to the VDDR pin, VDDCML0 pin and VDDCML1 pin of the second processing chip U2. The first ends of the capacitors C31, C32 and C33 are all connected to the second end of the magnetic bead L15, and the second ends of the capacitors C31, C32 and C33 are all grounded. The magnetic bead L15, the capacitor C31, the capacitor C32 and the capacitor C33 form an LC filter circuit to filter out the possible AC signal output by the power module 150.

[0088] The first end of the magnetic bead L16 is connected to the output end (VDD_1.8V) of the power module 150, and the second end of the magnetic bead L16 is connected to the VDDPLL pin of the second processing chip U2. The first ends of the capacitors C35 and C36 are both connected to the second end of the magnetic bead L16, and the second ends of the capacitors C35 and C36 are both grounded. The magnetic bead L16, the capacitor C35, and the capacitor C36 form an LC filter circuit to filter out possible AC signals output by the power module 150.

[0089] Figure 5 A circuit diagram of a POC module with a serial connection is provided in an embodiment of the present invention, such as Figure 5 As shown, based on the above embodiment, the string-added POC module 130 includes a first magnetic bead L1, an inductor L2, a resistor R2, an inductor L3, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C6 and a magnetic bead L7.

[0090] The first end of the first magnetic bead L1 is connected to the coaxial interface LVDS1, and the coaxial interface LVDS1 is connected to the receiver 300 through a coaxial cable. The second end of the first magnetic bead L1 is connected to the first end of the inductor L2, the second end of the inductor L2 is connected to the first end of the inductor L3, the second end of the inductor L3 is connected to the first end of the magnetic bead L7, and the second end of the magnetic bead L7 is connected to the input end of the deserialization POC module 140 and the input end of the power module 150.

[0091] The first end of the resistor R2 is connected to the first end of the inductor L2, and the second end of the resistor R2 is connected to the second end of the inductor L2. The first end of the resistor R3 is connected to the first end of the inductor L3, and the second end of the resistor R3 is connected to the second end of the inductor L3.

[0092] The first ends of capacitors C1, C2, C5 and C6 are all connected to the first end of magnetic bead L7, and the second ends of capacitors C1, C2, C5 and C6 are all grounded. Magnetic bead L7, capacitor C1, C2, C5 and C6 form an LC filter circuit to further filter out AC signals in the power supply voltage.

[0093] The power supply voltage from the receiver 300 passes through the first magnetic bead L1, the inductor L2, the inductor L3 and the magnetic bead L7, and the AC signal in the power supply voltage is filtered out, and the clean 12V power supply voltage is transmitted to the deserialization POC module 140 and the power supply module 150. In abnormal conditions (such as instantaneous high voltage such as lightning strike), the inductor L2 and the inductor L3 are discharged through the resistor R2 and the resistor R3 to prevent the instantaneous high voltage from damaging the circuit.

[0094] Figure 6 A circuit diagram of a deserializing POC module provided by an embodiment of the present invention, such as Figure 6As shown, based on the above embodiment, the deserialization POC module 140 includes a second magnetic bead L4, an inductor L5, a resistor R5, an inductor L6, a resistor R6, a capacitor C3, a capacitor C4, a capacitor C8, a capacitor C30 and a magnetic bead L8.

[0095] The first end of the second magnetic bead L4 is connected to the coaxial interface LVDS2, and the coaxial interface LVDS2 is connected to the LVDS camera 200 through a coaxial cable. The second end of the second magnetic bead L4 is connected to the first end of the inductor L5, the second end of the inductor L5 is connected to the first end of the inductor L6, the second end of the inductor L6 is connected to the first end of the magnetic bead L8, and the second end of the magnetic bead L8 is connected to the input end of the POC module 130 (i.e., the second end of the magnetic bead L7) and the input end of the power module 150.

[0096] The first end of the resistor R5 is connected to the first end of the inductor L5, and the second end of the resistor R5 is connected to the second end of the inductor L5. The first end of the resistor R6 is connected to the first end of the inductor L6, and the second end of the resistor R6 is connected to the second end of the inductor L6.

[0097] The first ends of capacitors C3, C4, C8 and C30 are all connected to the first end of magnetic bead L8, and the second ends of capacitors C3, C4, C8 and C30 are all grounded. Magnetic bead L8, capacitor C3, C4, C8 and C30 form an LC filter circuit to further filter out AC signals in the power supply voltage.

[0098] The power supply voltage from the POC module 130 is filtered out of the AC signal in the power supply voltage through the second magnetic bead L4, the inductor L5, the inductor L6 and the magnetic bead L8, and the clean power supply voltage is transmitted to the LVDS camera 200. In abnormal conditions (such as instantaneous high voltage such as lightning strike), the inductor L5 and the inductor L6 are discharged through the resistor R5 and the resistor R6 to prevent the instantaneous high voltage from damaging the circuit.

[0099] Figure 7 A circuit diagram of a power module provided by an embodiment of the present invention, such as Figure 7 As shown, the power module 150 includes a third processing chip U3, a first resistor R27, a second resistor R26, a resistor R24, a capacitor C12, a capacitor C15, a capacitor C26, a capacitor C34 and a capacitor C37.

[0100] The power input pin (IN) of the third processing chip U3 is connected to the output end of the POC module 130 (i.e., the second end of the magnetic bead L7). The power output pin (OUT) of the third processing chip U3 is used as the output end (VDD_1.8V) of the power module 150 and is connected to the deserializing module 120 and the serializing module 110.

[0101] The first end of the first resistor R27 is connected to the power output pin (OUT) of the third processing chip U3, the second end of the first resistor R27 is connected to the first end of the second resistor R26, and the second end of the second resistor R26 is grounded. The first end of the second resistor R26 is connected to the feedback pin (FB) of the third processing chip U3. The potential of the feedback pin (FB) is constant at 0.8V, and the output voltage V OUT The calculation formula is as follows:

[0102]

[0103] Therefore, as needed, the output voltage V of the power module 150 can be adjusted by adjusting the values ​​of the first resistor R27 and the second resistor R26. OUT size.

[0104] The first end of the resistor R24 ​​is connected to the output end of the POC module 130 (i.e., the second end of the magnetic bead L7), and the second end of the resistor R24 ​​is connected to the enable pin (EN) of the third processing chip U3. When the third processing chip U3 is powered on, the enable pin (EN) of the third processing chip U3 receives an enable signal, thereby activating the third processing chip U3.

[0105] The first ends of capacitors C26 and C37 are connected to the power output pin (OUT) of the third processing chip U3, and the second ends of capacitors C26 and C37 are grounded. Capacitors C26 and C37 are used to maintain the stability of the output voltage of the power output pin (OUT) of the third processing chip U3.

[0106] The first ends of capacitors C12, C15 and C34 are connected to the power input pin (IN) of the third processing chip U3, and the second ends of capacitors C12, C15 and C34 are grounded. Capacitors C12, C15 and C34 are used to maintain the stability of the voltage received by the power input pin (IN) of the third processing chip U3.

[0107] An analog ground pin (AGND) and a protection ground pin (PGND) of the third processing chip U3 are grounded.

[0108] Figure 8 A circuit diagram of a reset module provided by an embodiment of the present invention, such as Figure 8 As shown, the reset module 160 includes a fourth processing chip U4 and a grounding capacitor C18.

[0109] The power input terminal (VCC) of the fourth processing chip U4 is connected to the output terminal (VDD_1.8V) of the power module 150. The output terminal (OUT) of the fourth processing chip U4 is connected to the deserialization module 120 and the serialization module 110. Specifically, the output terminal (OUT) of the fourth processing chip U4 is connected to the PDB pin of the first processing chip U1 and the PDB pin of the second processing chip U2. The fourth processing chip U4 is used to send a reset signal to the first processing chip U1 and the second processing chip U2.

[0110] A first end of the grounding capacitor C18 is connected to the power input terminal (VCC) of the fourth processing chip U4, and a second end of the grounding capacitor C18 is grounded. The grounding capacitor C18 is used to maintain the voltage stability of the power input terminal (VCC) of the fourth processing chip U4.

[0111] In the above embodiment, the model and parameters of each electronic component have been recorded in detail in the accompanying drawings, and the embodiments of the present invention will not be repeated here. It should be noted that the model and parameters of each electronic component in the above embodiment are exemplary descriptions of the present invention, rather than limiting the present invention. In other embodiments of the present invention, for example, the signal of the first processing chip can be MAX96705, and the model of the second processing chip can be MAX96706.

[0112] The embodiment of the present invention also provides a vehicle, and further the vehicle is a large vehicle such as a bus or a truck with a long body. The vehicle includes the LVDS-COAX signal enhancer provided in the above embodiment, and the LVDS-COAX signal enhancer includes a serial addition module and a deserialization module.

[0113] The deserialization module is connected to the LVDS camera. The LVDS camera 200 can be arranged around the vehicle body to collect video information around the vehicle body. The LVDS camera performs serial processing on the collected video information and converts the low-speed parallel signal into a high-speed serial signal. The deserialization module is used to deserialize the video signal collected by the LVDS camera, convert the video signal into a parallel signal, and send it to the serialization module.

[0114] The serial adding module is connected to the deserializing module, and the serial adding module is used for performing serial adding processing on the video signal after the deserializing processing, and converting the parallel signal into a serial signal.

[0115] The string adding module is connected to the receiver, and is used to transmit the video signal after string adding to the receiver. For example, the receiver may be an ECU control box or a navigation host.

[0116] The embodiment of the present invention provides a vehicle, including an LVDS-COAX signal enhancer, the LVDS-COAX signal enhancer includes a serial addition module and a deserialization module, the deserialization module is connected to the LVDS camera, the deserialization module is used to deserialize the video signal collected by the LVDS camera, the serial addition module is connected to the deserialization module, the serial addition module is used to serialize the video signal after deserialization, the serial addition module is connected to a receiver, and the serial addition module is used to transmit the video signal after serial addition to the receiver. The present invention converts the video signal through the serial addition module and the deserialization module to enhance the transmission quality of the signal, solves the problem of excessive signal loss due to the long wiring harness, thereby causing signal distortion, improves the signal quality, and can be applied to large vehicles such as buses and trucks with long bodies.

[0117] The specific structure of the LVDS-COAX signal enhancer has been described in detail in the aforementioned embodiments, and will not be described in detail in the embodiments of the present invention.

[0118] In the description of this article, it is necessary to understand that the terms "up", "down", "left", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0119] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0120] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0121] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An LVDS-COAX signal enhancer, characterized in that: Including string adding module and de-stringing module; The deserialization module is connected to the LVDS camera, and the deserialization module is used for deserialization processing of the video signal collected by the LVDS camera; The string adding module is connected to the deserializing module, and the string adding module is used for performing string adding processing on the video signal after deserializing processing; The string adding module is connected to the receiver, and the string adding module is used to transmit the video signal after string adding processing to the receiver; It also includes a POC module for adding strings and a POC module for deserializing strings; The input end of the POC module for adding strings is connected to the receiver, the output end of the POC module for adding strings is connected to the input end of the POC module for deserializing strings, and the POC module for adding strings is used to receive the power supply voltage provided by the receiver; The output end of the deserialization POC module is connected to the LVDS camera, and the deserialization POC module is used to supply power to the LVDS camera; The serial addition POC module is also used to filter out the signal part from the receiver, and to isolate the signal from the serial addition module, retain the power supply part, and output a clean power supply voltage to the deserialization POC module. The deserialization POC module is also used to isolate the signals from the deserialization module and the LVDS camera.

2. The LVDS-COAX signal enhancer according to claim 1, characterized in that: It also includes a power supply module, the input end of the power supply module is connected to the output end of the string adding POC module, the output end of the power supply module is connected to the de-stringing module and the string adding module, and the power supply module is used to supply power to the de-stringing module and the string adding module.

3. The LVDS-COAX signal enhancer according to claim 2, characterized in that: It also includes a reset module, the reset module is connected to the deserialization module and the string adding module, and the reset module is used to send a reset signal to the deserialization module and the string adding module; The reset module is connected to the output end of the power module, and the power module is used to supply power to the reset module.

4. The LVDS-COAX signal enhancer according to claim 1, characterized in that: The string adding module includes a first processing chip and a first isolation capacitor; The signal output pin of the first processing chip is connected to the first end of the first isolation capacitor, and the second end of the first isolation capacitor is connected to the receiver; The signal input pin of the first processing chip is connected to the deserialization module.

5. The LVDS-COAX signal enhancer according to claim 1, characterized in that: The deserialization module includes a second processing chip and a second isolation capacitor; The signal input pin of the second processing chip is connected to the first end of the second isolation capacitor, and the second end of the second isolation capacitor is connected to the LVDS camera; The signal output pin of the second processing chip is connected to the string adding module.

6. The LVDS-COAX signal enhancer according to claim 2, characterized in that: The string-adding POC module includes a first magnetic bead; The first end of the first magnetic bead is connected to the receiver, and the second end of the first magnetic bead is connected to the input end of the deserializing POC module and the input end of the power module.

7. The LVDS-COAX signal enhancer according to claim 2, characterized in that: The deserialization POC module includes a second magnetic bead; The first end of the second magnetic bead is connected to the LVDS camera, and the second end of the second magnetic bead is connected to the output end of the string-adding POC module and the input end of the power module.

8. The LVDS-COAX signal enhancer according to claim 2, characterized in that: The power supply module includes a third processing chip, a first resistor and a second resistor; The power input pin of the third processing chip is connected to the output end of the string-added POC module; The power output pin of the third processing chip is connected to the deserializing module and the string adding module; A first end of the first resistor is connected to a power output pin of the third processing chip, a second end of the first resistor is connected to a first end of the second resistor, and a second end of the second resistor is grounded; The first end of the second resistor is connected to a feedback pin of the third processing chip.

9. The LVDS-COAX signal enhancer according to claim 3, characterized in that: The reset module includes a fourth processing chip and a grounding capacitor; The power input terminal of the fourth processing chip is connected to the output terminal of the power module; The output end of the fourth processing chip is connected to the deserializing module and the string adding module; A first end of the grounding capacitor is connected to a power input end of the fourth processing chip, and a second end of the grounding capacitor is grounded.

10. A vehicle, characterized in that: It comprises the LVDS-COAX signal enhancer as described in any one of claims 1 to 9.

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