Anti-interference device and remote control device comprising same
By introducing isolation components such as inductors into wireless communication devices, the problem of malfunction caused by electromagnetic interference was solved, and the stable operation and performance improvement of the devices were achieved.
Patent Information
- Application Number
- CN202511552308.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2018-01-04
- Publication Date
- 2026-01-16
AI Technical Summary
Wireless communication devices, such as RKE/PKE systems, are prone to malfunctions in electromagnetic interference environments, leading to performance degradation.
Anti-interference devices are used, including a first circuit module and isolation components. The isolation components, such as inductors, are connected in series in the circuit to reduce parasitic current and ensure stable circuit operation.
It effectively resists electromagnetic interference, reduces misoperation, and improves the operational performance and stability of the device.
Smart Images
Figure CN121354331A_ABST
Abstract
Description
[0001] This application is a divisional application of Chinese invention patent application (application number: 201810009240.6) filed on January 4, 2018, entitled "Anti-interference device and remote control device including said anti-interference device". Technical Field
[0002] This disclosure relates to wireless communication technology, and more specifically, to an anti-interference device and a remote control device including the anti-interference device. Background Technology
[0003] With the development of electronic devices, more and more electronic devices and devices are being controlled by remote control devices for user convenience. For example, wireless communication technology is widely used in various applications such as remote access control (RKE) / keyless access control systems (PKE).
[0004] However, the performance of RKE / PKE systems is often affected by various interferences present in the environment. For example, electromagnetic interference in the environment can cause the RKE / PKE system to generate erroneous induced currents, leading to malfunctions.
[0005] Therefore, there is a need for an anti-interference device and a remote control device including the anti-interference device, which can resist interference present in the environment, thereby improving the operating performance of the device. Summary of the Invention
[0006] The purpose of this invention is to provide an anti-interference device and a remote control device including the anti-interference device, so that...
[0007] To achieve the above-mentioned objectives, the technical solution of the present invention is implemented in the following ways:
[0008] According to a first aspect of this disclosure, an anti-interference device is provided, which may include: a first circuit module configured to perform a first operation; and an isolation component electrically connected to the first circuit module and configured to isolate interference to the first circuit module.
[0009] As an example, the anti-interference device may further include a second circuit module configured to perform a second operation and interfere with the first circuit module.
[0010] As an example, the second circuit module may be a loop antenna for transmitting RF power, and the first circuit module may be a switching circuit located in the loop antenna.
[0011] As an example, the isolation component may be one or more selected from inductors, coils, ferrite beads, or resistors.
[0012] As an example, the isolation component can be connected in series in the first circuit module.
[0013] According to a second aspect of this disclosure, a remote control device is provided, which may include: a loop antenna configured to transmit RF power; and one or more anti-interference devices located within the loop antenna. Each of the one or more anti-interference devices includes: a first circuit module configured to perform a first operation; and an isolation component electrically connected to the first circuit module and configured to isolate interference to the first circuit module, wherein the isolation component is arranged such that: when the loop antenna transmits RF power, no parasitic current is generated in the one or more anti-interference devices; and when the first circuit module of the one or more anti-interference devices is in operation, the radiated power of the loop antenna is unaffected.
[0014] As an example, the remote control device could be a keyless start switch for a car.
[0015] As an example, the isolation component may be one or more selected from inductors, coils, ferrite beads, or resistors.
[0016] As an example, the isolation component can be connected in series in the first circuit module.
[0017] As an example, the frequency range of the RF power emitted by the loop antenna can be from 300MHz to 1GHz. Attached Figure Description
[0018] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:
[0019] Figure 1 A block diagram illustrating the structure of an anti-interference device according to an exemplary embodiment of the present disclosure is shown;
[0020] Figure 2 A circuit diagram of an anti-interference device according to an example embodiment of the present disclosure is shown; and
[0021] Figure 3 A circuit diagram illustrating a specific implementation of a remote control device according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation
[0022] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.
[0023] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “a,” “an,” and “the,” as used herein, should also include the meanings of “a plurality” and “multiple,” unless the context clearly indicates otherwise. Furthermore, the terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0024] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.
[0025] The accompanying drawings show some block diagrams and / or flowcharts. It should be understood that some blocks or combinations thereof in the block diagrams and / or flowcharts can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when executed by the processor, these instructions can create means for implementing the functions / operations described in these block diagrams and / or flowcharts.
[0026] Therefore, the technology disclosed herein can be implemented in hardware and / or software (including firmware, microcode, etc.). Additionally, the technology disclosed herein can take the form of a computer program product stored on a computer-readable medium, which can be used by or in conjunction with an instruction execution system. In the context of this disclosure, a computer-readable medium can be any medium capable of containing, storing, transmitting, propagating, or transmitting instructions. For example, a computer-readable medium can include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, apparatuses, or propagation media. Specific examples of computer-readable media include: magnetic storage devices, such as magnetic tape or hard disk drives (HDDs); optical storage devices, such as optical discs (CD-ROMs); memories, such as random access memory (RAM) or flash memory; and / or wired / wireless communication links.
[0027] In real-life environments, various interferences often exist, which can affect the performance of devices such as remote access control (RKE) / keyless start (PKE) systems. Specifically, in the presence of electromagnetic interference, the device may erroneously generate induced currents, leading to malfunctions.
[0028] Embodiments of this disclosure provide an anti-interference device and a remote control device including the anti-interference device. The anti-interference device and the remote control device including the anti-interference device can resist interference present in the environment, thereby improving the operational performance of the device.
[0029] Figure 1 A block diagram showing the structure of an anti-interference device 100 according to an exemplary embodiment of the present disclosure is illustrated.
[0030] Specifically, such as Figure 1 As shown in Figure (a), the anti-interference device 100 according to an exemplary embodiment of the present disclosure may include: a first circuit module 111 configured to perform a first operation; and an isolation component 113 electrically connected to the first circuit module 111 and configured to isolate interference to the first circuit module 111. Specifically, the anti-interference device 100 may be implemented as any device performing a specific function (e.g., a switching function, a signal sensing function, and a notification function), wherein the specific function may be performed by the first circuit module 111. Furthermore, the isolation component may be one or more selected from inductors, coils, ferrite beads, or resistors. According to an exemplary embodiment of the present disclosure, the isolation component is connected in series in the first circuit module.
[0031] As previously mentioned, electromagnetic interference in the external environment can cause parasitic currents to be generated in the first circuit module 111, which can easily lead to malfunctions (e.g., generating false signals) in the first circuit module 111. In this example, by connecting the isolation component 113 in series in the first circuit module (e.g., an inductor), the anti-interference device 100 according to this example embodiment can resist interference from the outside, thereby avoiding malfunctions.
[0032] In addition, such as Figure 1 As shown in Figure (b), except for the reference Figure 1 In addition to the components described in (a) above, the anti-interference device 100 according to another exemplary embodiment of this disclosure may further include a second circuit module 115 configured to perform a second operation and interfere with the first circuit module 111. For example, the second circuit module 115 may be a circuit module performing communication. It should be noted that further details regarding the interference with the first circuit module 111 will not be repeated here. Figure 1 The components are similar to those in Figure (a).
[0033] Specifically, the second circuit module 115 can be a loop antenna for transmitting RF power, and the first circuit module 111 can be a switching circuit located in the loop antenna. In this case, the first circuit module 111 and the second circuit module 115 are mutually coupled, i.e., there is interference. To weaken or eliminate the mutual coupling between the two components, an isolation component can be connected in series in the first circuit module 111, thereby eliminating the influence of the second circuit module 115 on the first circuit module 111 and preventing malfunctions in the first circuit module 111. Furthermore, the configuration scheme according to this example embodiment can also ensure that the second circuit module 115 is not affected by the parasitic resistance in the first circuit module 111, thereby ensuring the normal operation of the second circuit module 115.
[0034] It should be noted that the principles of this disclosure are illustrated below using the example of implementing the anti-interference device as a switching circuit with a switching function. However, those skilled in the art will recognize that this disclosure is not limited thereto, and the anti-interference device according to the example embodiments of this disclosure can be implemented in other forms. For example, the anti-interference device can also be a smoke alarm device installed in a building, wherein the smoke alarm device generates an alarm when smoke is sensed.
[0035] Figure 2 A circuit diagram of an anti-interference device according to an example embodiment of the present disclosure is shown.
[0036] like Figure 2 As shown in (a) of Figure 1, although the first circuit module 111 is implemented as a switching circuit and the isolation component 113 is implemented as an inductor in this example, those skilled in the art will recognize that this disclosure is not limited thereto. Specifically, as shown, the switching circuit is equivalent to a circuit including resistors Z1, Z2, ..., Zi, inductor L2, capacitor C, and an ideal button, where Z1, Z2, ..., Zi are the parasitic resistances of the switching circuit, L2 is the equivalent inductance of the switching circuit, and C is the equivalent capacitance of the switching circuit. Furthermore, the interference source affecting the switching circuit is equivalent to a circuit including inductor L1, resistor Za, and capacitor Ca, where L1 is the inherent inductance of the interference source, Za is its equivalent resistance, and Ca is its inherent capacitance. The interference between the interference source and the switching circuit is represented by the mutual coupling M between L1 and L2. As described above, due to the mutual coupling between L1 and L2, an induced current may be generated in the switching circuit, thereby causing malfunction.
[0037] According to embodiments of this disclosure, by connecting an isolation component (inductor L3 in this embodiment) in series in the switching circuit (e.g.) Figure 2As shown in (b) of the diagram, this allows for the mitigation or resistance of interference sources to the switching circuit. By connecting inductor L3 in series with the switching circuit, the total impedance within the switching circuit is increased, correspondingly reducing the parasitic current generated due to interference, thereby preventing malfunctions. For the switching circuit, the increased total impedance reduces the parasitic current caused by interference sources, thus preventing the illusion that the switch has been pressed. Therefore, in this example, without affecting the normal operation of the switching circuit, the impedance value of the isolation component should be selected as large as possible; for example, L3 should be selected as a 100nH inductor to achieve a better isolation effect.
[0038] Embodiments of the present invention also provide a remote control device, comprising: a loop antenna configured to transmit RF power; and one or more anti-interference devices located within the loop antenna, each of the one or more anti-interference devices comprising: a first circuit module configured to perform a first operation; and an isolation component electrically connected to the first circuit module and configured to isolate interference to the first circuit module, wherein the isolation component is arranged such that: no parasitic current is generated in the one or more anti-interference devices when the loop antenna transmits RF power; and the radiated power of the loop antenna is unaffected when the first circuit module of the one or more anti-interference devices is in operation. The remote control device can be applied as a keyless start switch for automobiles. Furthermore, the frequency range of the RF power transmitted by the loop antenna is from 300 MHz to 1 GHz.
[0039] Figure 3 A circuit diagram illustrating a specific implementation of a remote control device according to an exemplary embodiment of the present disclosure is shown.
[0040] Figure 3 A circuit diagram is shown that uses the keyless start switch of a car as a remote control. Specifically, in Figure 3 In the illustrated embodiment, the switching circuit is surrounded by a loop antenna. The switching circuit may include multiple switches, such as SW1, SW2, and SW3. The operating frequency of the loop antenna can range from 300 MHz to 1 GHz. As mentioned above, mutual interference between the loop antenna and the switching circuit can lead to malfunctions in the switching circuit. For example, a large parasitic current may be generated in the switching circuit, causing it to be mistakenly interpreted as one or more of switches SW1, SW2, and SW3 being pressed, thus performing the corresponding operation. Furthermore, mutual interference between the loop antenna and the switching circuit can cause the RF radiated power of the loop antenna to change with variations in the parasitic capacitance in the switching circuit, resulting in unstable antenna performance.
[0041] To at least partially address the aforementioned problems, improvements have been made to the remote control device. The remote control device according to an exemplary embodiment of this disclosure includes a loop antenna and one or more anti-interference devices. In this embodiment, a 100nH inductor L31 is connected in series in the switching circuit, such as... Figure 3 As shown in the figure. It should be noted that the position of inductor L31 is not limited to the position shown in the figure, and can be any position in the switching circuit, as long as it enables: no parasitic current to be generated in one or more switching circuits when the loop antenna transmits RF power; and the radiated power of the loop antenna to be unaffected when the one or more switching circuits are in operation.
[0042] The test results for the above implementation will be described below.
[0043] First, a starting key, model PSA ADML V2 IML (available from Valeo), was used as the test object to conduct a radiation tolerance test in an environment with an electric field strength of 200V / m and a frequency range of 1GHz to 2GHz. The remote control device according to the exemplary embodiment of this disclosure includes the aforementioned anti-interference component. Tests were conducted on both, and the following results were obtained:
[0044] Table 1
[0045]
[0046] In other words, when the remote control device is configured according to an example embodiment of the present disclosure, including an anti-interference device using an isolation component (100nH inductor), the test object can exhibit good anti-interference performance.
[0047] In addition, the performance of the loop antenna was measured. The measurement results show that when the key is operated, the loop antenna inside the starter key without an anti-interference device is very likely to experience overcurrent protection (approximately 10%), while the loop antenna in the remote control device including an anti-interference device according to the exemplary embodiment of the present invention does not exhibit this phenomenon, resulting in more stable performance.
[0048] In addition, the current inside the loop antenna was detected to test the stability of the operating current under different conditions, and the following results were obtained:
[0049] Table 2
[0050]
[0051] Table 3
[0052]
[0053] In other words, without anti-interference devices, the operating current is quite unstable. For example, for sample 2, its operating current is 13.6 mA when unpackaged, 17.3 mA after packaging, 18.6 mA when held in hand, 20 mA when button 1 of the key is pressed, and 18.6 mA when button 2 of the key is pressed. In contrast, in the case of the remote control device with anti-interference devices according to this example embodiment, the operating current is relatively stable. For example, for sample 2, its operating current is 11 mA when unpackaged, 12 mA after packaging, 11.3 mA when held in hand, 11 mA when button 1 of the key is pressed, and 11.5 mA when button 2 of the key is pressed.
[0054] Finally, the radiated power of the loop antenna was tested for multiple samples, and the following results were obtained:
[0055] Table 4
[0056]
[0057] As shown in Table 4, without anti-interference devices, the radiated power of the loop antennas of different samples varies significantly, with a standard deviation of 1.07. However, according to the remote control device with anti-interference devices according to the exemplary embodiments of this disclosure, the radiated power of the loop antennas of different samples varies much less, with a standard deviation of 0.45. In other words, the remote control device with anti-interference devices according to the exemplary embodiments of this disclosure is more stable and more compliant with specifications.
[0058] It should be noted that the embodiments of the present invention are not limited to the field of motor vehicles, but can also be used in wireless communication fields such as television remote control devices, industrial or household robots.
[0059] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention.
[0060] While this disclosure has been shown and described with reference to certain embodiments, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of this disclosure, wherein the scope of this disclosure is defined not by detailed description and embodiments but by the appended claims and their equivalents.
Claims
1. An anti-interference device in a remote control device, comprising: a first circuit loop module configured to perform a first operation; and an isolation component electrically connected to the first circuit loop module and configured to isolate interference to the first circuit loop module, wherein the isolation component is a 100 nH inductor, wherein the isolation component is connected in series in the first circuit loop module to prevent the first circuit loop module from generating a parasitic current due to interference to the first circuit loop.
2. The anti-interference device of claim 1, further comprising a second circuit loop module configured to perform a second operation and interfere with the first circuit loop module.
3. The anti-interference device of claim 2, wherein the second circuit loop module is a loop antenna for transmitting RF power and the first circuit loop module is a switching circuit located in the loop antenna.
4. A remote control device, comprising: a loop antenna configured to transmit RF power; and one or more anti-interference devices located in the loop antenna, each of the one or more anti-interference devices comprising: a first circuit loop module configured to perform a first operation; and an isolation component electrically connected to the first circuit loop module and configured to isolate interference to the first circuit loop module, wherein the isolation component is arranged such that no parasitic current is generated in the one or more anti-interference devices when the loop antenna transmits RF power and the radiated power of the loop antenna is not affected when the first circuit loop module of the one or more anti-interference devices is operating, wherein the isolation component is a 100 nH inductor, and wherein the isolation component is connected in series in the first circuit loop module to prevent the first circuit loop module from generating a parasitic current due to interference to the first circuit loop.
5. The remote control device of claim 4, wherein the remote control device is a keyless go switch device for a vehicle.
6. The remote control device of claim 4, wherein the frequency range of the RF power transmitted by the loop antenna is 300 MHz to 1 GHz.