A circuit for enhancing signal integrity of a USB interface and an industrial camera

Abstract

This utility model relates to a circuit for enhancing USB signal integrity and an industrial camera. The circuit for enhancing USB signal integrity includes a front-end data acquisition module, a front-end signal processing module, a back-end signal processing module, a back-end main system module, a front-end DC power supply module, and a back-end DC power supply module. The front-end data acquisition module includes a first USB interface, and the back-end main system module includes a second USB interface. The front-end DC power supply module is connected to both the front-end data acquisition module and the front-end signal processing module, and the back-end DC power supply module is connected to both the back-end signal processing module and the back-end main system module. The front-end data acquisition module is connected to the front-end signal processing module, the front-end signal processing module is connected to the back-end signal processing module, and the back-end signal processing module is connected to the back-end main system module. This circuit for enhancing USB signal integrity can effectively improve the transmission rate and accuracy of USB signals during long-distance transmission, thereby enhancing USB signal integrity.

Description

Technical Field

[0001] This utility model relates to the field of USB interface technology, and in particular to a circuit and an industrial camera for enhancing the signal integrity of a USB interface. Background Technology

[0002] USB (Universal Serial Bus) is a serial bus standard and an input / output interface technology specification widely used in personal computers, mobile devices, and other information and communication products, and extending to other related fields such as photographic equipment, digital televisions (set-top boxes), and game consoles. However, USB signals suffer from rapid attenuation during transmission, compromising signal integrity and limiting their application scenarios. For example, in complex electromagnetic environments, the data transmission rate, accuracy, and maximum transmission distance of USB signals are significantly reduced. Utility Model Content

[0003] Therefore, it is necessary to address the problem that USB signals attenuate rapidly during transmission, which compromises signal integrity and limits the application scenarios of USB signals. This would require providing a circuit and an industrial camera to enhance the signal integrity of the USB interface.

[0004] A circuit for enhancing USB signal integrity includes a front-end data acquisition module, a front-end signal processing module, a back-end signal processing module, a back-end main system module, a front-end DC power supply module, and a back-end DC power supply module. The front-end data acquisition module includes a first USB interface, and the back-end main system module includes a second USB interface.

[0005] The front-end DC power supply module is connected to the front-end data acquisition module and the front-end signal processing module respectively, and the back-end DC power supply module is connected to the back-end signal processing module and the back-end main system module respectively.

[0006] The front-end data acquisition module is connected to the front-end signal processing module, the front-end signal processing module is connected to the back-end signal processing module, and the back-end signal processing module is connected to the back-end main system module.

[0007] The aforementioned circuit for enhancing USB signal integrity includes a front-end data acquisition module, a front-end signal processing module, a back-end signal processing module, a back-end host system module, a front-end DC power supply module, and a back-end DC power supply module. The front-end data acquisition module includes a first USB interface, and the back-end host system module includes a second USB interface. The front-end DC power supply module is connected to both the front-end data acquisition module and the front-end signal processing module, and the back-end DC power supply module is connected to both the back-end signal processing module and the back-end host system module. The front-end data acquisition module is connected to the front-end signal processing module, which is connected to the back-end signal processing module, and the back-end signal processing module is connected to the back-end host system module. When this circuit for enhancing USB signal integrity is operating, the front-end data acquisition module can acquire data and generate a USB signal, and send the USB signal to the front-end signal processing module through the first USB interface. The front-end signal processing module can perform a first signal enhancement on the USB signal and send the enhanced USB signal to the back-end signal processing module. The back-end signal processing module can perform a second signal enhancement on the USB signal and send the enhanced USB signal to the back-end host system module through the second USB interface. The back-end host system module can perform signal processing on the USB signal and implement specific functions. As can be seen, the front-end and back-end signal processing modules of this circuit for enhancing USB interface signal integrity can perform first and second signal enhancements on the USB signal during transmission, respectively. This prevents the USB signal from attenuating too quickly during transmission, ensuring stable and reliable data transmission even in complex electromagnetic environments. This enhances the anti-interference capability of the USB signal, guarantees stable and reliable transmission, reduces the data error rate during transmission, and significantly reduces the overall system overhead, resulting in smoother system operation. Furthermore, by separately configuring front-end and back-end DC power supply modules to isolate the power supplies, the impact of power supply noise on USB signal transmission can be reduced, effectively blocking the coupling path of electromagnetic interference between the front and back ends. Moreover, this circuit for enhancing USB signal integrity can also appropriately reduce the hardware configuration of the application system, lowering costs and making the product more competitive in the market, improving user efficiency, and enhancing the applicability of the device.

[0008] In one embodiment, the circuit for enhancing USB signal integrity further includes a grounding module, and the front-end signal processing module, the back-end signal processing module, the front-end data acquisition module, and the back-end main system module are respectively connected to the grounding module.

[0009] In one embodiment, the circuit for enhancing USB signal integrity further includes a cable module that connects the front-end signal processing module and the back-end signal processing module, respectively.

[0010] In one embodiment, the circuit for enhancing USB signal integrity further includes a first common-mode inductor module, which is connected to both the front-end data acquisition module and the front-end signal processing module.

[0011] In one embodiment, the circuit for enhancing USB signal integrity further includes a second common-mode inductor module, which is connected to both the back-end host system module and the back-end signal processing module.

[0012] In one implementation, the backend main system module includes a microcontroller.

[0013] In one embodiment, the front-end data acquisition module includes a sensor.

[0014] In one embodiment, the front-end signal processing module includes a first signal processing chip, which is a USB2514.

[0015] In one embodiment, the back-end signal processing module includes a second signal processing chip, which is a USB2514.

[0016] An industrial camera includes the aforementioned circuitry for enhancing USB signal integrity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the circuit for enhancing USB signal integrity according to this utility model;

[0018] Figure 2 This is another schematic diagram of the circuit for enhancing USB signal integrity according to this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the industrial camera of this utility model;

[0020] Among them, 10 is a circuit for enhancing USB signal integrity, 11 is a front-end data acquisition module, 12 is a front-end signal processing module, 13 is a back-end signal processing module, 14 is a back-end main system module, 15 is a front-end DC power supply module, 16 is a back-end DC power supply module, 17 is a grounding module, 18 is a cable module, 191 is a first common-mode inductor module, and 192 is a second common-mode inductor module. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] This utility model discloses a circuit for enhancing USB signal integrity.

[0025] like Figures 1 to 2 As shown, the circuit 10 for enhancing USB signal integrity includes a front-end data acquisition module 11, a front-end signal processing module 12, a back-end signal processing module 13, a back-end host system module 14, a front-end DC power supply module 15, and a back-end DC power supply module 16. The front-end data acquisition module 11 includes a first USB interface, and the back-end host system module 14 includes a second USB interface. The front-end DC power supply module 15 is connected to the front-end data acquisition module 11 and the front-end signal processing module 12, and the back-end DC power supply module 16 is connected to the back-end signal processing module 13 and the back-end host system module 14, respectively. The front-end data acquisition module 11 is connected to the front-end signal processing module 12, the front-end signal processing module 12 is connected to the back-end signal processing module 13, and the back-end signal processing module 13 is connected to the back-end host system module 14.

[0026] The aforementioned circuit for enhancing USB signal integrity includes a front-end data acquisition module, a front-end signal processing module, a back-end signal processing module, a back-end host system module, a front-end DC power supply module, and a back-end DC power supply module. The front-end data acquisition module includes a first USB interface, and the back-end host system module includes a second USB interface. The front-end DC power supply module is connected to both the front-end data acquisition module and the front-end signal processing module, and the back-end DC power supply module is connected to both the back-end signal processing module and the back-end host system module. The front-end data acquisition module is connected to the front-end signal processing module, which is connected to the back-end signal processing module, and the back-end signal processing module is connected to the back-end host system module. When this circuit for enhancing USB signal integrity is operating, the front-end data acquisition module can acquire data and generate a USB signal, and send the USB signal to the front-end signal processing module through the first USB interface. The front-end signal processing module can perform a first signal enhancement on the USB signal and send the enhanced USB signal to the back-end signal processing module. The back-end signal processing module can perform a second signal enhancement on the USB signal and send the enhanced USB signal to the back-end host system module through the second USB interface. The back-end host system module can perform signal processing on the USB signal and implement specific functions. As can be seen, the front-end and back-end signal processing modules of this circuit for enhancing USB interface signal integrity can perform first and second signal enhancements on the USB signal during transmission, respectively. This prevents the USB signal from attenuating too quickly during transmission, ensuring stable and reliable data transmission even in complex electromagnetic environments. This enhances the anti-interference capability of the USB signal, guarantees stable and reliable transmission, reduces the data error rate during transmission, and significantly reduces the overall system overhead, resulting in smoother system operation. Furthermore, by separately configuring front-end and back-end DC power supply modules to isolate the power supplies, the impact of power supply noise on USB signal transmission can be reduced, effectively blocking the coupling path of electromagnetic interference between the front and back ends. Moreover, this circuit for enhancing USB signal integrity can also appropriately reduce the hardware configuration of the application system, lowering costs and making the product more competitive in the market, improving user efficiency, and enhancing the applicability of the device.

[0027] The circuit 10 for enhancing USB signal integrity also includes a grounding module 17, and the front-end signal processing module 12, the back-end signal processing module 13, the front-end data acquisition module 11 and the back-end main system module 14 are respectively connected to the grounding module 17.

[0028] By adding a unified grounding module 17, a low-impedance grounding path can be provided for the front-end signal processing module 12, the back-end signal processing module 13, the front-end data acquisition module 11, and the back-end main system module 14. This eliminates the common-mode voltage shift caused by the ground potential difference between the front-end signal processing module 12, the back-end signal processing module 13, the front-end data acquisition module 11, and the back-end main system module 14, further suppresses the coupling of ground loop interference to the USB signal, improves the anti-common-mode noise capability of the USB signal, and ensures the stability of USB signal transmission.

[0029] The circuit 10 for enhancing USB signal integrity also includes a cable module 18, which connects to both the front-end signal processing module 12 and the back-end signal processing module 13. The cable module 18 uses an anti-interference shielded cable. By connecting the cable module 18 to both the front-end and back-end signal processing modules, USB signal attenuation and external electromagnetic interference during long-distance transmission can be reduced, and USB signal distortion caused by cable radiation or received noise can be avoided. This is particularly suitable for applications with high-frequency interference, such as industrial cameras.

[0030] Furthermore, the circuit 10 for enhancing USB signal integrity also includes a first common-mode inductor module 191, which is connected to both the front-end data acquisition module 11 and the front-end signal processing module 12. The first common-mode inductor module 191 includes a first common-mode inductor. By placing the first common-mode inductor module 191 between the front-end data acquisition module 11 and the front-end signal processing module 12, high-frequency filtering can be performed on common-mode noise (such as high-frequency power supply ripple and environmental radiation interference) introduced by the front-end data acquisition module 11. This suppresses noise from spreading to the front-end signal processing module 12 through the first USB interface, improves the purity of the input signal to the front-end signal processing module 12, and reduces the bit error rate.

[0031] Furthermore, the circuit 10 for enhancing USB signal integrity also includes a second common-mode inductor module 192, which is connected to both the back-end host system module 14 and the back-end signal processing module 13. The second common-mode inductor module 192 includes a second common-mode inductor. By placing the second common-mode inductor module 192 between the back-end signal processing module 13 and the back-end host system module 14, secondary filtering can be performed on the switching noise (such as microcontroller digital signal feedback and power supply transient noise) generated by the back-end host system module 14, blocking common-mode interference from propagating back to the back-end signal processing module 13 through the second USB interface, forming a bidirectional noise isolation barrier, and ensuring electromagnetic compatibility for high-speed data transmission.

[0032] The back-end main system module 14 includes a microcontroller. The back-end main system module 14 can process USB signal patterns using the microcontroller, thereby reducing redundant circuit design, lowering system power consumption and hardware costs, while simultaneously improving the precise control of signal timing, further reducing data errors caused by timing jitter.

[0033] The front-end data acquisition module 11 includes sensors. By setting sensors in the front-end data acquisition module 11, real-time data acquisition and USB signal generation can be achieved through the sensors.

[0034] The front-end signal processing module 12 includes a first signal processing chip, which is a USB2514. Furthermore, the back-end signal processing module 13 includes a second signal processing chip, which is also a USB2514. The USB2514 is a dedicated USB hub chip with built-in signal equalization, impedance matching, and error checking functions. It can actively compensate for signal attenuation and distortion in the transmission link, improve the signal-to-noise ratio of differential signals, and reduce the use of external discrete components, simplifying circuit layout and reducing costs.

[0035] This utility model also discloses an industrial camera. For example... Figure 3 As shown, the industrial camera 20 includes the aforementioned circuit 10 for enhancing USB signal integrity. By including the aforementioned circuit 10 for enhancing USB signal integrity, the industrial camera 20 can achieve stable long-distance transmission of USB signals, and the data transmission rate and accuracy of the USB signal are significantly improved.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circuit for enhancing the signal integrity of a USB interface, characterized in that, It includes a front-end data acquisition module, a front-end signal processing module, a back-end signal processing module, a back-end main system module, a front-end DC power supply module, and a back-end DC power supply module. The front-end data acquisition module includes a first USB interface, and the back-end main system module includes a second USB interface. The front-end DC power supply module is connected to the front-end data acquisition module and the front-end signal processing module respectively, and the back-end DC power supply module is connected to the back-end signal processing module and the back-end main system module respectively. The front-end data acquisition module is connected to the front-end signal processing module, the front-end signal processing module is connected to the back-end signal processing module, and the back-end signal processing module is connected to the back-end main system module.

2. The circuit for enhancing USB interface signal integrity according to claim 1, characterized in that, It also includes a grounding module, and the front-end signal processing module, the back-end signal processing module, the front-end data acquisition module and the back-end main system module are respectively connected to the grounding module.

3. The circuit for enhancing USB interface signal integrity according to claim 2, characterized in that, It also includes a cable module, which is connected to the front-end signal processing module and the back-end signal processing module respectively.

4. The circuit for enhancing USB interface signal integrity according to claim 3, characterized in that, It also includes a first common-mode inductor module, which is connected to the front-end data acquisition module and the front-end signal processing module respectively.

5. The circuit for enhancing USB interface signal integrity according to claim 4, characterized in that, It also includes a second common-mode inductor module, which is connected to the back-end main system module and the back-end signal processing module respectively.

6. The circuit for enhancing USB interface signal integrity according to any one of claims 1 to 5, characterized in that, The backend main system module includes a microcontroller.

7. The circuit for enhancing USB interface signal integrity according to any one of claims 1 to 5, characterized in that, The front-end data acquisition module includes sensors.

8. The circuit for enhancing USB interface signal integrity according to any one of claims 1 to 5, characterized in that, The front-end signal processing module includes a first signal processing chip, which is a USB2514.

9. The circuit for enhancing USB interface signal integrity according to any one of claims 1 to 5, characterized in that, The back-end signal processing module includes a second signal processing chip, which is a USB2514.

10. An industrial camera, characterized in that, The industrial camera includes the circuitry for enhancing USB interface signal integrity as described in any one of claims 1 to 9.

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