Digital signal transmission medium and electronic device
By setting up ring conductors between two mutually rotating hardware circuits to form signal coupling, the existing high-speed digital communication solution has solved the problem of increasing hardware complexity and cost, and high-reliability digital signal transmission is achieved.
Patent Information
- Application Number
- CN202311182871.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-13
- Publication Date
- 2025-03-18
AI Technical Summary
The existing high-speed digital communication solution increases the complexity of hardware design and seriously increases product costs when implementing high-speed digital communication between two axial moving hardware circuits.
By providing two mutually rotating ring conductors, signal coupling is formed, thereby achieving close-coupled communication. This solution does not require modulation processing or adding a modulation and demodulation circuit, which reduces costs and does not require mutations in inductive or capacitive components such as LC, thereby improving reliability.
It realizes digital signal transmission with a simple structure and high reliability, reduces hardware design complexity and product costs, and improves communication reliability.
Smart Images
Figure CN119652360A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of communication technology, and in particular to a digital signal transmission medium and electronic equipment. Background Art
[0002] In the design of products such as robotic arms and laser radars, there are situations where two different hardware structures move axially. In order to achieve high-speed digital communication between the two axially moving hardware circuits, the existing solution is generally to use wireless communication technology, that is, by adding analog-to-digital converters (ADC) and digital-to-analog converters (DAC) circuits, and using radio frequency transceiver circuits to achieve high-speed digital communication between the two systems. However, the existing solutions not only increase the complexity of hardware design, but the high-bandwidth ADC circuit will seriously increase product costs. Summary of the invention
[0003] The present application provides a digital signal transmission medium and electronic equipment with simple structure and high reliability.
[0004] In a first aspect, an embodiment of the present application provides a digital signal transmission medium. The digital signal transmission medium includes a first signal transmission module and a second signal transmission module that move relative to each other, the first signal transmission module includes a first circular conductor, the second signal transmission module includes a second circular conductor, the first circular conductor and the second circular conductor are respectively non-closed ring conductors, the first circular conductor and the second circular conductor are arranged concentrically and the first circular conductor and the second circular conductor rotate relative to each other, and signal coupling is formed between the first circular conductor and the second circular conductor, so that the digital signal in one of the first signal transmission module and the second signal transmission module is transmitted to the other.
[0005] In a second aspect, an embodiment of the application provides an electronic device using a digital signal transmission medium, the electronic device comprising a first component and a second component rotating relative to each other, and the above-mentioned digital signal transmission medium, wherein the first signal transmission module and the second signal transmission module in the above-mentioned digital signal transmission medium are respectively arranged in the first component and the second component.
[0006] The digital signal transmission medium and the electronic device are provided with two mutually rotating circular conductors, so that signal coupling is formed between the circular conductors to achieve close-range coupled communication. Since the present application realizes communication through signal coupling between circular conductors, it does not need to undergo modulation processing or add a modulation and demodulation circuit, thereby reducing costs. At the same time, it does not require a sudden change in inductive or capacitive elements such as LC, thereby achieving better reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0008] Figure 1 A schematic diagram of a digital signal transmission medium provided in the first embodiment of the present application.
[0009] Figure 2 This is a schematic diagram of a first circular conductor and a second circular conductor provided in the first embodiment of the present application.
[0010] Figure 3 This is a schematic diagram of a first circular conductor and a second circular conductor provided in the second embodiment of the present application.
[0011] Figure 4 A schematic diagram of the principle topological structure of the digital signal transmission medium provided in an embodiment of the present application.
[0012] Figure 5 A schematic diagram of a digital signal transmission medium provided in accordance with the second embodiment of the present application.
[0013] Figure 6 A schematic diagram of a digital signal transmission medium provided in the third embodiment of the present application.
[0014] Figure 7 A schematic diagram of a digital signal transmission medium provided in the fourth embodiment of the present application.
[0015] Figure 8 A schematic diagram of a digital signal transmission medium provided in the fifth embodiment of the present application.
[0016] Fig. 9 A schematic diagram of a digital signal transmission medium provided in the sixth embodiment of the present application.
[0017] Fig.10 A schematic diagram of an electronic device using a digital signal transmission medium provided in the first embodiment of the present application.
[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0020] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar planning objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate. In other words, the described embodiments are implemented according to an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations may also include other content. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to only those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0021] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0022] The present application provides a digital signal transmission medium, wherein the digital signal transmission medium is provided with two mutually rotating circular conductors, so that signal coupling is formed between the circular conductors to achieve close-range coupled communication. Since the present application achieves communication through signal coupling between circular conductors, it does not require modulation processing or modulation and demodulation circuits, thereby reducing costs. At the same time, it does not require mutations of inductive or capacitive elements such as LC, thereby achieving better reliability.
[0023] Please see Figure 1 , Figure 1The structural diagram of the digital signal transmission medium 100 provided in the first embodiment of the present application is illustrated. The digital signal transmission medium 100 includes a first signal transmission module 10 and a second signal transmission module 20 that rotate relative to each other. Signal transmission is performed between the first signal transmission module 10 and the second signal transmission module 20. Among them, the digital signal transmission medium 100 is applied to electronic devices with two different hardware structures that move axially, such as laser radars and robotic arms. It can be understood that the first signal transmission module 10 and the second signal transmission module 20 are arranged in two different parts that move axially, that is, two different parts rotate relative to each other. Signal transmission is required between two different parts. Taking radar as an example, one of the two different parts can be a part that is provided with an optical transceiver and includes a photoelectric signal conversion; the other can be a part of a system processor that analyzes and calculates electrical signals. Among them, the first signal transmission module 10 is provided with a first circular conductor 11 and the second signal transmission module 20 is provided with a second circular conductor 21. The first circular conductor 11 and the second circular conductor 21 are cocentric and spaced apart, so that signal coupling is formed between the first circular conductor 21 and the second circular conductor 22, thereby enabling communication between the first signal transmission module 10 and the second signal transmission module 20.
[0024] It can be understood that when a changing signal is loaded on one of the first circular conductor 11 and the second circular conductor 21 , the other one generates an induced electromotive force when the first circular conductor 11 and the second circular conductor 21 rotate relative to each other, thereby forming an induced current.
[0025] Further, the rotation mode between the first circular conductor 11 and the second circular conductor 21 is to keep one end of the first circular conductor 11 and the second circular conductor 21 stationary and the other end rotates; or the first circular conductor 11 and the second circular conductor 21 both ends rotate in the same direction at the same time; or the first circular conductor 11 and the second circular conductor 21 rotate in opposite directions, but the two ends of the first circular conductor 11 rotate at the same time and the two ends of the second circular conductor 21 rotate at the same time. In other words, it is sufficient to ensure that the first circular conductor 11 and the second circular conductor 21 generate relative rotation. More specifically, the first signal transmission module 10 and the second signal transmission module 20 are respectively installed on the rotating mechanism, and the relative rotation is driven by the rotating mechanism. For example, the rotating mechanism keeps one of the first signal transmission module 10 and the second signal transmission module 20 moving and the other stationary, so that the first signal transmission module 10 and the second signal transmission module 20 move relative to each other.
[0026] Since the present embodiment realizes communication through the first circular conductor 11 and the second circular conductor 21, no modulation processing or modulation and demodulation circuit is required, thus reducing the cost. At the same time, no sudden change of inductive or capacitive elements such as LC is required, thus improving the reliability.
[0027] The projections of the area surrounded by the first circular conductor 11 and the second circular conductor 21 on a plane parallel to the area partially or completely overlap. The first circular conductor 11 and the second circular conductor 21 are respectively non-closed rings. That is, the first circular conductor 11 and the second circular conductor 21 are respectively circular conductors with openings. The first circular conductor 11 and the second circular conductor 21 can be made of copper material. The first circular conductor 11 includes at least one first sub-circular conductor 110. The second circular conductor 21 includes at least one second sub-circular conductor 210.
[0028] Please see again Figure 1 In this embodiment, the diameter of the first circular conductor 11 is the same as the diameter of the second circular conductor 21, and the first circular conductor 11 and the second circular conductor 21 are spaced apart in the axial direction. The interval between the first circular conductor 11 and the second circular conductor 21 in the axial direction is H1. That is, the projections of the areas surrounded by the first circular conductor 11 and the second circular conductor 21 on the plane parallel to the areas all overlap.
[0029] In some feasible embodiments, the diameter of the first circular conductor 11 is different from the diameter of the second circular conductor 21, and the first circular conductor 11 and the second circular conductor 21 are mutually nested, so that there is a gap between the first circular conductor 11 and the second circular conductor 21 along the diameter. In other words, the projections of the areas surrounded by the first circular conductor 11 and the second circular conductor 21 on a plane parallel to the areas partially overlap.
[0030] Furthermore, the first circular conductor 11 includes a first sub-circular conductor 110 . The second circular conductor 21 includes a second sub-circular conductor 210 .
[0031] Further, the first signal transmission module 10 also includes a circuit board 12, and two first terminals 13 arranged on the first circuit board 12. The second signal transmission module 20 also includes a second circuit board 22, and two second terminals 23 arranged on the second circuit board 22. The two first terminals 13 are used to electrically connect with the two ends of the first circular conductor 11 to form a first loop 14. The two second terminals 23 are used to electrically connect with the two ends of the second circular conductor 21 to form a second loop 24. The two first terminals 13 can be wires arranged on the circuit board 12, or can be arranged on the wiring posts of the circuit board 12. The two second terminals 23 are wiring posts or wires arranged on the second circuit board 22. In this embodiment, the two first terminals 13 and the two second terminals 23 are wires, that is, the wiring of the first circuit board 12 and the second circuit board 22 corresponding to the first circular conductor 11 and the second circular conductor 21 are the same, and the digital signal transmission medium 100 adopts a differential signal wiring method to achieve differential signal transmission.
[0032] Please refer to Figure 2 , Figure 2 The schematic diagram shows that the first annular conductor 11 and the second annular conductor 21 are arranged at intervals in the axial direction.
[0033] The first circular conductor 11 and the second circular conductor 21 have their own self-inductances L1 and L2, and at the same time, there is a mutual inductance M between the first circular conductor 11 and the second circular conductor 21. 12 and mutual capacitance C 12 Appropriate self-inductance L1 and L2 can ensure that the high-speed signal waveform will not collapse, oscillate or suffer other distortions. 12 It is the key to ensure that the signal is coupled from one of the first circular conductor 11 and the second circular conductor 21 to the other. Due to LC resonance, the mutual capacitance C 12 It will limit the available bandwidth for communication. The formula for calculating the resonant frequency is as follows:
[0034]
[0035] Where f is frequency, L is inductance, and C is mutual capacitance. The larger the frequency f of the signal changes, the wider the bandwidth of the signal.
[0036] Please refer to Figure 3 , Figure 3 The diagram shows that the diameter of the first circular conductor 11 is different from the diameter of the second circular conductor 21, and the first circular conductor 11 and the second circular conductor 21 are mutually nested. Similarly, the first circular conductor 11 and the second circular conductor 21 have their own self-inductances L1 and L2, and there is a mutual inductance M between the first circular conductor 11 and the second circular conductor 21. 12 and mutual capacitance C 12 .
[0037] Please refer to Figure 4 , Figure 4 The topological diagram of the signal transmission principle of the digital signal transmission medium 100 is shown. The first signal transmission module 10 and the second signal transmission module 20 rotate to transmit signals. One of the first circular conductor 11 and the second circular conductor 21 is used as a transmitting end TX, and the other is used as a receiving end RX. There is a mutual inductance M between the transmitting end TX and the receiving end RX. 12， The transmission line characteristic impedance Z0. A first loop 14 is formed in the transmitting end TX. A second loop 24 is formed in the receiving end RX. The first loop 14 includes a source impedance R s , the transmitting end impedance The second loop 24 includes a load impedance R L , receiving end impedance The calculation formula for the transmission signal is as follows:
[0038]
[0039] V B =(1+Γ B )V A (2)
[0040]
[0041]
[0042]
[0043]
[0044]
[0045]
[0046]
[0047]
[0048] V D =(1+Γ D )V C (11)
[0049]
[0050] Among them, V S is the initial signal level; V D is the level at point D, that is, the level at the input end of the load; V A is the level at point A; V B is the level at point B; V C is the level at point C; is the level of mutual inductance; is the level of the receiving end RX; is the impedance of the transmitting end TX; is the receiving end impedance; Γ B is the reflection coefficient between the impedance of the first loop conductor 11 and the impedance of the transmission line on the PCB; Γ M is the reflection coefficient between the impedance of the first loop conductor 11 and the impedance of the second loop conductor 21; Γ c is the reflection coefficient between the impedance of the second loop conductor 21 and the impedance of the transmission line on the PCB; Γ D It is the reflection coefficient between the load impedance at the receiving end and the transmission line impedance on the PCB. is the mutual inductance impedance.
[0051] Due to the broadband characteristics of digital signals, it is necessary to meet the transmission requirements within a very wide frequency band. The embodiment of the present application utilizes the inductance and mutual inductance characteristics of the receiving end RX and the transmitting end TX, and considers the limitation of the communication bandwidth on the coupling mutual capacitance between the two to achieve short-distance coupling communication. D The level is at a higher value, which can make the transmitter impedance Receiver impedance and mutual inductance M 12 Therefore, it is necessary to set a higher mutual inductance value and a larger coupling area.
[0052] Furthermore, the mutual capacitance calculation formula is as follows:
[0053]
[0054] Among them, C 12 represents mutual capacitance; ε represents dielectric constant; S represents the plate area; and D represents the distance between the plates.
[0055] There is mutual capacitance coupling between the signal transmitting end TX and the receiving end RX, and the mutual capacitance C 12 With M 12 Forming a parallel relationship, mutual capacitance impedance for:
[0056]
[0057] C 12 With M 12 The impedance after parallel connection is Z eff for:
[0058]
[0059] Among them, the transmitting end impedance Receiver impedance Mutual Inductance 12， , and mutual capacitance impedance The impedance of the transmitting end can be adjusted by changing the diameter, positional relationship, and number of sub-circular conductors contained in the first circular conductor 11 and the second circular conductor 21. Receiver impedance Mutual Inductance 12 , and mutual capacitance impedance More specifically, the larger the diameters of the first circular conductor 11 and the second circular conductor 21, the greater the self-inductance. Under the premise that the relative positions of the first circular conductor 11 and the second circular conductor 21 remain unchanged, the greater the mutual inductance, the greater the mutual capacitance, the smaller the resonant frequency, the better the low-frequency coupling effect, but the smaller the available communication bandwidth.
[0060] Please see Figure 5 , Figure 5 The structural diagram of the digital signal transmission medium 200 provided in the second embodiment of the present application is illustrated. The difference between the digital signal transmission medium 200 provided in the second embodiment and the digital signal transmission medium 100 provided in the first embodiment is that one of the two first terminals 13a is a wire arranged on the circuit board 12a, and the other is a terminal arranged on the circuit board 12a. The two second terminals 23 are terminals arranged on the second circuit board 22a, respectively, and the interval H2 between the first circular conductor 11a and the second circular conductor 21a is smaller than the interval H1. Since the first terminal 13a and the second terminal 23a have changed, that is, the wiring method of the digital signal transmission medium 200 has changed, and a single-ended wiring signal wiring method is adopted, which realizes single-ended signal transmission, thereby providing an application environment suitable for different chips.
[0061] Please see Figure 6 , Figure 6 The structural diagram of the digital signal transmission medium 300 provided in the third embodiment of the present application is illustrated. The difference between the digital signal transmission medium 300 provided in the third embodiment and the digital signal transmission medium 200 provided in the second embodiment is that the first circular conductor 11b includes a plurality of first sub-circular conductors 110b, and the second circular conductor 21b includes a plurality of second sub-circular conductors 210b. The diameter of the first circular conductor 11d is greater than that of the second circular conductor 21d, and each includes a plurality of sub-circular conductors. Due to the plurality of sub-circular conductors, the digital signal transmission medium 100 has the following three characteristics. 1. Under specific structural and processing requirements, the requirements of the self-inductance Ltx of the transmitting end can be met. 2. Multiple rings can increase the mutual inductance M12. 3. The change in mutual capacitance C12 is relatively small. Due to the above three characteristics, the communication bandwidth and cost requirements required by the design can be met to the greatest extent according to the actual product appearance structure and processing requirements.
[0062] Please see Figure 7 , Figure 7 The structure diagram of the digital signal transmission medium 400 provided in the fourth embodiment of the present application is illustrated. The difference between the digital signal transmission medium 400 provided in the fourth embodiment and the digital signal transmission medium 300 provided in the third embodiment is that the two first terminals 13c and the two second terminals 23c are terminals provided on the first circuit board 12c and the second circuit board 22c respectively. Similarly, since the first terminal 13a and the second terminal 23a have changed, that is, the wiring method of the circuit board has changed, that is, the digital signal transmission medium 400 provided in the fourth embodiment adopts a differential signal wiring method, and realizes differential signal transmission, which can match the application environment applicable to different chips with the digital signal transmission medium 300.
[0063] Please see Figure 8 , Figure 8 The structural diagram of the digital signal transmission medium 500 provided in the fifth embodiment of the present application is illustrated. The difference between the digital signal transmission medium 500 provided in the fifth embodiment and the digital signal transmission medium 400 provided in the fourth embodiment is that the diameter R11 of the first circular conductor 11d is greater than the diameter R21 of the second circular conductor 21d, and the first circular conductor 11d is sleeved on the outside of the second circular conductor 21d. Due to the nesting inside and outside, and the diameter of the first circular conductor 11d is greater than that of the second circular conductor 21d, which respectively includes a plurality of sub-circular conductors, the mutual inductance M12 is increased to achieve a better coupling effect. The mutual capacitance C12 is passively increased, because the thickness of a single circular conductor is very small, so the increment of C12 is relatively small.
[0064] Please see Fig. 9 , Fig. 9 The structural schematic diagram of the digital signal transmission medium 600 provided in the sixth embodiment of the present application is illustrated. The difference between the digital signal transmission medium 600 provided in the sixth embodiment and the digital signal transmission medium 500 provided in the fifth embodiment is that the two first wiring terminals 13f are respectively arranged on the first circuit board 12f. The two second wiring terminals 23f are respectively arranged on the second circuit board 22f. That is, the digital signal transmission medium 600 provided in the sixth embodiment adopts a single-ended signal wiring method, and realizes single-ended signal transmission, which can match the application environment applicable to different chips with the digital signal transmission medium 300. And the interval H3 between the first circular conductor 11f and the second circular conductor 21f along the diameter direction is greater than the interval H2 between the first circular conductor 11d and the second circular conductor 21d along the diameter direction.
[0065] It is understandable that the digital signal transmission medium can obtain the required transmission performance by adjusting the diameter, positional relationship, number of sub-circular conductors included, etc. of the first circular conductor and the second circular conductor. For example, the transmitting end impedance Receiver impedance Mutual Inductance 12 , and mutual capacitance impedance The performance value is the best.
[0066] Please see Fig.10 , which is a schematic diagram of an electronic device 99 using the digital signal transmission medium provided by the above embodiment.
[0067] The electronic device 99 includes a first component 990, a second component 992, a rotating mechanism 993 for rotating the first component 990 and the second component 992 relative to each other, and a digital signal transmission medium provided by any embodiment. In this embodiment, the digital signal transmission medium 100 is taken as an example. The first annular conductor 10 and the second annular conductor 20 of the digital transmission medium 100 are respectively arranged on the first component 990 and the second component 992.
[0068] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
[0069] The above examples are only preferred embodiments of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.
Claims
1. A digital signal transmission medium, characterized in that: The digital signal transmission medium includes: a first signal transmission module and a second signal transmission module that move relative to each other, the first signal transmission module includes a first circular conductor, the second signal transmission module includes a second circular conductor, the first circular conductor and the second circular conductor are respectively non-closed ring conductors, the first circular conductor and the second circular conductor are cocentrically arranged and the first circular conductor and the second circular conductor rotate relative to each other, and signal coupling is formed between the first circular conductor and the second circular conductor so that the digital signal in one of the first signal transmission module and the second signal transmission module is transmitted to the other.
2. The digital signal transmission medium according to claim 1, wherein: The first annular conductor and the second annular conductor have the same diameter and are spaced apart in the axial direction.
3. The digital signal transmission medium according to claim 2, wherein: The diameter of the first circular conductor is larger than that of the second circular conductor, and the first circular conductor and the second circular conductor are sleeved.
4. The digital signal transmission medium according to claim 3, characterized in that: The first circular conductor includes at least one first sub-circular conductor; the second circular conductor includes at least one second sub-circular conductor.
5. The display adaptation method according to claim 4, characterized in that: The first circular conductor includes a plurality of identical first sub-circular conductors connected in parallel, and each first sub-circular conductor is arranged concentrically; the second circular conductor includes a plurality of identical second sub-circular conductors connected in parallel and arranged concentrically.
6. The digital signal transmission medium according to claim 4, characterized in that: Each of the first sub-circular ring conductors and each of the second sub-circular ring conductors are non-closed circular rings arranged around a circle.
7. The digital signal transmission medium according to claim 6, characterized in that: The first signal transmission module also includes two first connection terminals, and the second signal transmission module also includes two second connection terminals. The two ends of the first circular conductor are respectively electrically connected to the two first connection terminals to form a first loop; the two ends of the second circular conductor are respectively electrically connected to the two second connection terminals to form a second loop.
8. The digital signal transmission medium according to claim 7, characterized in that: The first signal transmission module further includes a first circuit board, the second signal transmission module further includes a second circuit board, and the first sub-circular conductor and the second sub-circular conductor are respectively arranged on the first circuit board and the second circuit board.
9. The digital signal transmission medium according to claim 8, characterized in that: The two first terminals are terminals or wires respectively arranged on the first circuit board; the two second terminals are terminals or wires respectively arranged on the second circuit board.
10. An electronic device using a digital signal transmission medium, characterized in that: The electronic device comprises a first component and a second component that rotate relative to each other, and the digital signal transmission medium as claimed in any one of claims 1 to 9, wherein the first signal transmission module and the second signal transmission module in the digital signal transmission medium are respectively arranged in the first component and the second component.