Circuit board and electronic device

Abstract

The application discloses a kind of circuit board and electronic device, wherein the circuit board includes annular first insulating substrate;The end surface of first insulating substrate is provided with first circuit part and the first interface of connecting external element;The other end surface of first insulating substrate is printed with first spiral conductive circuit;Two ends of first spiral conductive circuit are connected with first circuit part.Electronic device includes above-mentioned circuit board, and also includes fixed element, fixed element has second spiral conductive circuit and the second circuit part of connecting two ends of second spiral conductive circuit;Second spiral conductive circuit is concentric with first spiral conductive circuit and is arranged opposite.In the application, wireless power supply and signal transmission can be carried out by the same pair of spiral conductive circuit, and the first spiral conductive circuit and the first circuit part are arranged on the front and back sides of the first insulating substrate, which can effectively avoid the signal interference between the first spiral conductive circuit and the first circuit part, and make the circuit board structure small, simple and integrated.

Description

Technical Field

[0001] This invention relates to the field of circuit board technology, and in particular to a circuit board and electronic device for acquiring operating parameters of rotating components. Background Technology

[0002] In various commodities and equipment, it is often necessary to obtain various operating parameters of continuously rotating parts through data acquisition units. Since the data acquisition unit is installed on the rotating part, it is difficult to power the data acquisition unit and output the data acquired by the data acquisition unit. In the existing technology, power supply and data output are generally carried out through electric slip rings. Electric slip rings are generally large in size, have high requirements for installation space, and have low reliability. Therefore, a completely new method for data acquisition is needed. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a small circuit board and electronic device that can realize wireless power supply and signal output.

[0004] Technical solution: To achieve the above objective, the circuit board of the present invention includes an annular first insulating substrate; a first circuit portion and a first interface for connecting external components are provided on one end face of the first insulating substrate; a first spiral conductive line is printed on the other end face of the first insulating substrate; both ends of the first spiral conductive line are connected to the first circuit portion.

[0005] Furthermore, an amplification circuit is also provided on the first insulating substrate, and the amplification circuit and the first circuit portion are located on the same end face of the first insulating substrate; the first interface is connected to the first circuit portion through the amplification circuit.

[0006] Furthermore, the amplifier circuit includes two half-bridges, which are disposed opposite each other on both sides of the central through hole on the first insulating substrate; the two half-bridges are connected by a connection line printed on the first insulating substrate, which extends along the edge of the central through hole.

[0007] Furthermore, the inner diameter of the central through hole is greater than or equal to 20 mm.

[0008] An electronic device includes the circuit board described above, and also includes a fixing element having a second spiral conductive line and a second circuit portion connecting the two ends of the second spiral conductive line; the second spiral conductive line is concentrically arranged opposite to the first spiral conductive line.

[0009] Furthermore, the fixing element is in the form of a circuit board, which also includes a ring-shaped second insulating substrate, the second spiral conductive line is printed on one end face of the second insulating substrate, and the second circuit portion is disposed on the other end face of the second insulating substrate.

[0010] Furthermore, in both the first and second vortex conductive lines, the spacing between adjacent coils is 0.127-0.245 mm.

[0011] Furthermore, the inner and outer ring dimensions of the first spiral conductive circuit are 48.3±5mm and 52±5mm, respectively; the inner and outer ring dimensions of the second spiral conductive circuit are 48±5mm and 54±5mm, respectively.

[0012] Furthermore, the inner and outer ring dimensions of the first spiral conductive circuit are 41.8±5mm and 45.2±5mm, respectively; the inner and outer ring dimensions of the second spiral conductive circuit are 40.25±5mm and 46.5±5mm, respectively.

[0013] Furthermore, the first vortex conductive circuit and the second vortex conductive circuit have 4 turns and 10 turns, respectively.

[0014] Beneficial Effects: The circuit board and electronic device of the present invention, by setting a circuit board with a first spiral conductive line and a first circuit portion, allows the circuit board to rotate with a rotating component and connect to a data acquisition unit on the rotating component during use. Power is supplied to the circuit board through electromagnetic induction between the second spiral conductive line on the fixed element and the first spiral conductive line on the circuit board. Furthermore, the circuit board can transmit data acquired by the data acquisition unit through electromagnetic induction between the two spiral conductive lines, achieving wireless signal output. The circuit board and electronic device of the present invention are compact, easy to install, and do not require a large installation space on the product or equipment. Placing the first spiral conductive line and the first circuit portion on opposite sides of the first insulating substrate effectively avoids signal interference between the first spiral conductive line and the first circuit portion, resulting in a compact, simple, and integrated circuit board structure with high transmission efficiency, stable signal, and extremely low power consumption, which is beneficial for the miniaturization of electronic devices and their associated equipment. Attached Figure Description

[0015] Figure 1 This is a first end view of the first insulating substrate;

[0016] Figure 2 This is a second end view of the first insulating substrate;

[0017] Figure 3 This is the circuit diagram for a bridge circuit;

[0018] Figure 4This is a schematic diagram of the electronic device.

[0019] Figure 5 This is a first end view of the second insulating substrate;

[0020] Figure 6 This is a second end view of the second insulating substrate.

[0021] In the diagram: 1-Circuit board; 11-First circuit section; 12-First interface; 13-First spiral conductive line; 14-Amplifier circuit; 141-Half bridge; 142-Connecting line; 15-Central through hole; 16-First insulating substrate; 2-Fixing element; 21-Second spiral conductive line; 22-Second circuit section; 221-Second interface; 23-Second insulating substrate; 231-Mounting ear; 3-Signal acquisition element; 4-Rotating component; 5-Base; 6-First bracket; 61-Matching part; 7-Second bracket. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] like Figures 1-2 The circuit board 1 shown includes a first insulating substrate 16 with a main body in the shape of a ring. A first circuit portion 11 and a first interface 12 for connecting external components are provided on one end face of the first insulating substrate 16. The first circuit portion 11 is composed of conductive lines and electronic components printed on the first insulating substrate 16. The first interface 12 is used to connect a signal acquisition element 3. A first spiral conductive line 13 is printed on the other end face of the first insulating substrate 16. Both ends of the first spiral conductive line 13 are connected to the first circuit portion 11. Conductors that connect the conductive lines printed on the two end faces of the first insulating substrate 16 can be embedded in the first insulating substrate 16 to realize the connection between the first spiral conductive line 13 and the first circuit portion 11.

[0024] Based on the aforementioned circuit board, the present invention also discloses an electronic device, such as... Figure 4 As shown, it includes the aforementioned circuit board 1 and a fixing element 2. The fixing element 2 has a second spiral conductive line 21 and a second circuit portion 22 connecting the two ends of the second spiral conductive line 21. The second spiral conductive line 21 is concentrically aligned with the first spiral conductive line 13. The second circuit portion 22 has a second interface 221 for connecting to an external power supply and outputting signals to the outside.

[0025] Preferably, such as Figures 5-6As shown, the fixing element 2 is also in the form of a circuit board, which further includes a ring-shaped second insulating substrate 23. The second spiral conductive line 21 is printed on one end face of the second insulating substrate 23, and the second circuit portion 22 is disposed on the other end face of the second insulating substrate 23. The second insulating substrate 23 has a plurality of mounting ears 231 with mounting holes. The end face of the second insulating substrate 23 on which the second spiral conductive line 21 is printed is mounted opposite to the end face of the first insulating substrate 16 on which the first spiral conductive line 13 is printed.

[0026] By setting the first spiral conductive line 13 and the circuit on both sides of the circuit board 1, signal interference between the first spiral conductive line 13 and the circuit can be effectively avoided. This also makes the circuit board 1 structurally simple and small in size, facilitating its installation on the rotating component 4 of the existing device. Similarly, by placing the second circuit portion 22 and the second spiral conductive line 21 on both sides of the second insulating substrate 23 in the fixing element 2, signal interference between the second spiral conductive line 21 and the second circuit portion 22 can be effectively avoided while minimizing the size of the fixing element 2, resulting in a compact structure for the entire electronic device.

[0027] Preferably, an amplification circuit 14 is further provided on the first insulating substrate 16, and the amplification circuit 14 and the first circuit portion 11 are located on the same end face of the first insulating substrate 16; the first interface 12 is connected to the first circuit portion 11 through the amplification circuit 14. The electrical signal collected by the signal acquisition element 3 is amplified by the amplification circuit 14 and then input to the first circuit portion 11.

[0028] Preferably, the amplifier circuit 14 includes, as follows: Figure 3 The bridge circuit shown includes two half-bridges 141, which are disposed opposite each other on both sides of the central through-hole 15 on the first insulating substrate 16. The two half-bridges 141 are connected by a connecting line 142 printed on the first insulating substrate 16, which extends along the edge of the central through-hole 15. In actual use, each of the two half-bridges 141 is connected to a signal acquisition element 3 for acquiring the operating parameters of the rotating component 4 through a first interface 12. In this way, two signal acquisition elements 3 can be arranged at positions with a central angle interval of 180° on the rotating component 4 (e.g., ...). Figure 4 (As shown), to improve detection accuracy. The above-mentioned connecting line 142 extends along the edge of the central through hole 15, which can effectively avoid electromagnetic interference with the first spiral conductive line 13.

[0029] In actual use, circuit board 1 is mounted on rotating component 4, and signal acquisition element 3 connected to first interface 12 is mounted on rotating component 4. In addition, fixing element 2 is set to work with circuit board 1, and fixing element 2 is mounted on fixed base 5.

[0030] Specifically, the circuit board 1 is mounted on the rotating component 4 via the first bracket 6. The first bracket 6 is fixed on the rotating component 4. The central through hole 15 of the circuit board 1 has a circular hole portion, and two square holes are symmetrically arranged on both sides of the circular hole portion. Correspondingly, the first bracket 6 has a fitting portion 61 corresponding to the shape of the central through hole 15. That is, the fitting portion 61 has a cylindrical portion and two square portions symmetrically arranged on both sides of the cylindrical portion. The fitting portion 61 is a hollow structure. The signal acquisition element 3 is mounted on the rotating component 4 and placed inside the square portion. It is connected to the circuit board 1 through the hole on the square portion. In this way, the circuit board 1 can be stably mounted and the circuit board 1 can be prevented from rotating relative to the rotating component 4.

[0031] The fixing element 2 is connected to the base 5 via the second bracket 7.

[0032] The first circuit section 11 includes a signal modulation circuit and a power receiving circuit. The second circuit section 22 includes an electromagnetic excitation circuit and a signal demodulation circuit.

[0033] The electromagnetic excitation circuit is connected to an external power source and generates an alternating current that is applied to the second vortex conductive line 21, causing the second vortex conductive line 21 to generate an alternating magnetic field. The first vortex conductive line 13 senses the alternating magnetic field and generates an alternating current. This alternating current is rectified and filtered by the power receiving circuit and converted into direct current to power the first circuit section 11. The signal modulation circuit modulates the signal acquired by the signal acquisition element 3 to generate a carrier signal that is applied to the first vortex conductive line 13. The first vortex conductive line 13 generates an alternating magnetic field, and the second vortex conductive line 21 senses the alternating magnetic field and generates an alternating current signal. This signal is then restored to a data signal by the signal demodulation circuit. The above-mentioned signal modulation circuit, power receiving circuit, electromagnetic excitation circuit, and signal demodulation circuit all use existing technologies. These circuits are common in the field of wireless charging. Since these circuits are not the innovation of this invention, their specific circuits will not be described in detail here. In contrast, in the field of wireless charging, the transmitting coil and the receiving coil are set independently on their respective PCB boards. In this application, a spiral conductive line printed on one end face of an insulating substrate is used for power supply and communication, and the circuit is set on the other end face of the insulating substrate. Both power supply and communication use the same pair of spiral conductive lines (i.e., the first spiral conductive line 13 and the second spiral conductive line 21), which makes the structure of the entire electronic device much simpler and more compact, and easier to install.

[0034] As can be seen from the above process, on the one hand, the fixed element 2 is connected to the power supply, which supplies power to the first spiral conductive line 13 through the second spiral conductive line 21, enabling the circuit board 1 to operate. On the other hand, the signal acquisition element 3 can collect the operating data of the rotating part 4. The first circuit part 11 processes the collected operating data, modulates the processed data, and loads it onto the first spiral conductive line 13. In this way, the first spiral conductive line 13 can generate an electromagnetic signal. The fixed element 2 receives the electromagnetic signal through the second spiral conductive line 21 and demodulates it to obtain the operating data of the rotating part 4. This achieves power supply and signal output, simplifying the structure of the electronic device.

[0035] To prevent interference between power supply and signal transmission, the alternating magnetic field for power supply generated by the first vortex conductive line 13 and the alternating magnetic field for data transmission generated by the second vortex conductive line 21 have frequencies that differ by at least one order of magnitude. Furthermore, the frequency of the alternating magnetic field for data transmission is higher, thus effectively avoiding signal interference.

[0036] Preferably, the spacing between adjacent coils in the first spiral conductive line 13 is 0.127-0.245 mm, more preferably 0.152 mm. Similarly, in the second spiral conductive line 21, the spacing between adjacent coils is 0.127-0.245 mm, more preferably 0.152 mm. The first spiral conductive line 13 and the second spiral conductive line 21 have 4 and 10 coils, respectively.

[0037] Preferably, the inner diameter of the central through hole 15 is greater than or equal to 20 mm.

[0038] In the first embodiment, the inner and outer ring dimensions of the first spiral conductive line 13 are 48.3±5mm and 52±5mm, respectively; the inner and outer ring dimensions of the second spiral conductive line 21 are 48±5mm and 54±5mm, respectively. Here, taking the inner circle size of the first spiral conductive line 13 as an example, which is 48.3±5mm, representing the range [43.3, 53.3], preferably, the inner circle size of the first coil 11 can be any value within the range of 48.3±5mm with a step interval of 0.01mm, with the optimal value being 48.3mm; similarly, the outer circle size of the first spiral conductive line 13, provided it is larger than the inner circle size, can be any value within the range of 52±5mm with a step interval of 0.01mm, with the optimal value being 52mm; the inner and outer circle sizes of the second spiral conductive line 21 are 48±5mm and 54±5mm respectively, with the optimal values ​​being 48mm and 54mm respectively.

[0039] Based on this, the inner and outer diameters of the main body of the first insulating substrate 16 are 41±5mm and 66±5mm, respectively; the second insulating substrate 23 is annular, with inner and outer diameters of 35±5mm and 57±5mm, respectively. Similarly, the above dimensions can be any value within the corresponding numerical range with a step interval of 0.01mm, and must satisfy the premise that the outer diameter is greater than the inner diameter.

[0040] In the second embodiment, the inner and outer ring dimensions of the first spiral conductive line 13 are 41.8±5mm and 45.2±5mm, respectively; the inner and outer ring dimensions of the second spiral conductive line 21 are 40.25±5mm and 46.5±5mm, respectively. Each of these dimensions can be any value within a corresponding numerical range, with a step interval of 0.01mm, and must satisfy the condition that the outer diameter is greater than the inner diameter.

[0041] Based on this, the inner and outer diameters of the main body of the first insulating substrate 16 are 30.5±5mm and 52±5mm, respectively; the second insulating substrate 23 is annular, with inner and outer diameters of 30.5±5mm and 53±5mm, respectively. Similarly, the above dimensions can be any value within the corresponding numerical range, with a step interval of 0.01mm, and must satisfy the premise that the outer diameter is greater than the inner diameter.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A circuit board comprising an annular first insulating substrate (16); a first circuit portion (11) and a first interface (12) for connecting external components are disposed on one end face of the first insulating substrate (16); characterized in that, A first spiral conductive line (13) is printed on the other end face of the first insulating substrate (16); both ends of the first spiral conductive line (13) are connected to the first circuit part (11); an amplification circuit (14) is also provided on the first insulating substrate (16), the amplification circuit (14) and the first circuit part (11) are located on the same end face of the first insulating substrate (16); the first interface (12) is connected to the first circuit part (11) through the amplification circuit (14); the amplification circuit (14) includes two half-bridges (141), the two half-bridges (141) are disposed opposite to each other on both sides of the central through hole (15) on the first insulating substrate (16); the two half-bridges (141) are connected by a connecting line (142) printed on the first insulating substrate (16), the connecting line (142) extends along the edge of the central through hole (15).

2. The circuit board according to claim 1, characterized in that, The inner diameter of the central through hole (15) is greater than or equal to 20 mm.

3. An electronic device, characterized in that, It includes the circuit board according to any one of claims 1-2, and further includes a fixing element (2), the fixing element (2) having a second spiral conductive line (21) and a second circuit portion (22) connecting the two ends of the second spiral conductive line (21); the second spiral conductive line (21) and the first spiral conductive line (13) are arranged concentrically opposite each other.

4. The electronic device according to claim 3, characterized in that, The fixing element (2) is in the form of a circuit board, which also includes a ring-shaped second insulating substrate (23). The second spiral conductive line (21) is printed on one end face of the second insulating substrate (23), and the second circuit part (22) is disposed on the other end face of the second insulating substrate (23).

5. The electronic device according to claim 4, characterized in that, In the first vortex conductive line (13) and the second vortex conductive line (21), the spacing between adjacent coils is 0.127-0.245mm.

6. The electronic device according to claim 4, characterized in that, The inner and outer ring dimensions of the first vortex conductive line (13) are 48.3±5mm and 52±5mm, respectively; the inner and outer ring dimensions of the second vortex conductive line (21) are 48±5mm and 54±5mm, respectively.

7. The electronic device according to claim 4, characterized in that, The inner and outer ring dimensions of the first spiral conductive line (13) are 41.8±5mm and 45.2±5mm, respectively; the inner and outer ring dimensions of the second spiral conductive line (21) are 40.25±5mm and 46.5±5mm, respectively.

8. The electronic device according to claim 3, characterized in that, The first vortex conductive line (13) and the second vortex conductive line (21) have 4 turns and 10 turns, respectively.

Images