Automobile key frequency detection device
By designing a car key frequency detection device including a main control chip, a frequency acquisition module and a display module, the problem of difficulty in detecting whether the car remote control key is invalid in the prior art is solved, and fast and convenient frequency detection and intuitive effectiveness judgment are achieved.
Patent Information
- Application Number
- CN202421052895.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-05-11
AI Technical Summary
It is difficult for the prior art to quickly and conveniently detect whether the car remote control key fails, and it is difficult for ordinary users to judge whether the detection results are normal.
A car key frequency detection device is designed, including a main control chip, a frequency acquisition module and a display module. The main control chip stores data from multiple frequency bands. The frequency acquisition module collects the frequency of the key to be tested and compares it with the stored frequency band data. The display module displays the corresponding frequency band average frequency or abnormal reminder information.
It realizes the rapid detection of the frequency of different car keys, and allows users to judge whether the key to be tested is valid through intuitive display of information, avoiding users' need to understand complex detection standards.
Smart Images
Figure CN222825607U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of frequency detection, in particular to a vehicle key frequency detection device. Background Art
[0002] With the development of automobiles, car remote control keys have become popular, and the number of remote control failures of remote control keys has also increased. The current common detection method is to use a special frequency detector for detection, but most users do not have such a professional frequency detection device at home. If there is a problem with the remote control key, it is necessary to go to a car repair shop or 4S shop for detection, which is time-consuming and laborious. How to quickly and conveniently detect whether the car remote control key is invalid has become a concern for car owners. To solve this problem, the prior art proposes a detection device for detecting car keys, which includes a frequency detection circuit, but the detection device can only detect the current frequency of the key to be tested, and the detection result generally has errors. Ordinary users are not clear about the frequency specifications of conventional car keys, and it is difficult to determine whether the frequency data obtained by the detection is normal. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art and to provide a car key frequency detection device which is convenient for quickly detecting the frequencies of different car keys and convenient for judging whether the key to be tested is valid.
[0004] According to the embodiment of the utility model, the automobile key frequency detection device includes a main control chip, a frequency acquisition module and a display module. The main control chip is electrically connected to the frequency acquisition module and the display module respectively. The main control chip stores data of multiple frequency bands, and the data of the multiple frequency bands include the frequencies of automobile key samples of multiple brands / models. The frequency acquisition module collects the frequency data of the key to be tested and feeds the frequency data back to the main control chip. The main control chip can compare the frequency data with multiple frequency bands to determine whether the frequency data falls into one of the frequency bands. If the frequency data falls into one of the frequency bands, the display module displays the average frequency of the frequency band. If the frequency data does not fall into the frequency band, the display module displays abnormal reminder information.
[0005] According to some embodiments of the present invention, a power detection module is included, the power detection module is electrically connected to the main control chip to detect the battery power of the key to be tested, and the display module can display the detected battery power information.
[0006] According to some embodiments of the present invention, four frequency bands are included, namely 315MHz±0.6, 433MHz±0.6, 868MHz±0.6, and 902MHz±0.6.
[0007] According to some embodiments of the present utility model, the frequency acquisition module includes a frequency receiving chip U1 and a filter circuit, and the filter circuit is electrically connected to the frequency receiving end of the frequency receiving chip U1.
[0008] According to some embodiments of the utility model, the filtering circuit includes a resistor R265, a resistor R266, a capacitor C150, a capacitor C151 and a capacitor C152, one end of the resistor R265 and one end of the capacitor C150 are respectively electrically connected to the RFIP pin of the frequency receiving chip U1, the other end of the capacitor C150 is respectively electrically connected to one end of the resistor R266 and one end of the capacitor C151, the other end of the resistor R266 and the other end of the resistor R265 are respectively grounded, the other end of the capacitor C151 is electrically connected to one end of the capacitor C152, and the other end of the capacitor C152 is electrically connected to the RFIP pin of the frequency receiving chip U1.
[0009] According to some embodiments of the present invention, the display module is an LCD display screen.
[0010] The automobile key frequency detection device according to the embodiment of the utility model has at least the following beneficial effects: first, the frequency of automobile key samples of multiple brands and models is collected through a frequency detector, and the collected data is sorted and summarized to obtain a frequency range including multiple frequency bands, that is, the frequencies of common automobile keys all fall into these N frequency bands. Then, the multiple frequency band data are stored in the main control chip, and the frequency of the key to be tested only needs to be collected through a conventional frequency acquisition module and fed back to the main control chip. The main control chip traverses N frequency bands in turn through a cyclic scanning method to read the corresponding data to compare with the frequency of the key to be tested; when the frequency of the key to be tested falls into a certain frequency band, the average frequency of the frequency band is displayed, which means that the key to be tested is normal; when the frequency of the key to be tested does not fall into the frequency band, it means that the key to be tested is abnormal, and an abnormal reminder message can be displayed. The user can intuitively judge whether the key to be tested is invalid through the information displayed by the display module. As long as the frequency data is displayed, it means that the key to be tested is normal, and it can also be known that it falls into the frequency band where the displayed average frequency is located. As long as the abnormal reminder information is displayed, the abnormal situation of the key to be tested can be known, and there is no need to look up the relevant detection standards based on the tested frequency data to determine whether the data is normal. The detection device can quickly detect the frequency of different car keys through a main control chip that stores the frequency range and a conventional frequency acquisition module, and it is convenient to intuitively judge whether the key to be tested is valid through the display module.
[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings;
[0013] Figure 1 It is a circuit block diagram of a car key frequency detection device;
[0014] Figure 2 This is the circuit schematic diagram of the frequency acquisition module. DETAILED DESCRIPTION
[0015] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0016] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0017] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0018] Reference Figure 1 to Figure 2 The utility model discloses a car key frequency detection device, comprising a main control chip, a frequency acquisition module 10 and a display module. The main control chip is electrically connected to the frequency acquisition module 10 and the display module respectively. The display module can adopt an LCD display screen. The main control chip stores data of multiple frequency bands, and the data of the multiple frequency bands include the frequencies of car key samples of multiple brands / models. The frequency acquisition module 10 acquires the frequency data of the key to be tested and feeds the frequency data back to the main control chip. The main control chip can compare the frequency data with the multiple frequency bands to determine whether the frequency data falls into one of the frequency bands. If the frequency data falls into one of the frequency bands, the display module displays the average frequency of the frequency band. If the frequency data does not fall into the frequency band, the display module displays an abnormal reminder message.
[0019] Furthermore, it also includes a power detection module, which is electrically connected to the main control chip to detect the battery power of the key to be tested. The display module can display the detected battery power information, and the power detection module adopts the existing power detection circuit.
[0020] After collection, it is known that the frequencies of conventional car keys currently include four frequency bands, namely 315MHz±0.6, 433MHz±0.6, 868MHz±0.6, and 902MHz±0.6. When the collected frequency data of the car key to be tested falls into one of the frequency bands, the display module shows that the average frequency of the frequency band is 315MHz, 433MHz, 868MHz or 902MHz.
[0021] like Figure 2 The frequency acquisition module 10 includes a frequency receiving chip U3 and a filtering circuit, and the filtering circuit is electrically connected to the frequency receiving end of the frequency receiving chip U3. The filtering circuit includes a resistor R265, a resistor R266, a capacitor C150, a capacitor C151 and a capacitor C152, one end of the resistor R265 and one end of the capacitor C150 are electrically connected to the RFIP pin of the frequency receiving chip U3, the other end of the capacitor C150 is electrically connected to one end of the resistor R266 and one end of the capacitor C151, the other end of the resistor R266 and the other end of the resistor R265 are grounded, the other end of the capacitor C151 is electrically connected to one end of the capacitor C152, and the other end of the capacitor C152 is electrically connected to the RFIP pin of the frequency receiving chip U3, so as to effectively filter the collected frequency and make the collected data more accurate.
[0022] According to the automobile key frequency detection device and detection device of the embodiment of the utility model, at least the following beneficial effects are achieved: first, the frequencies of automobile key samples of multiple brands and models are collected through a frequency detector, and the collected data are sorted and summarized to obtain a frequency range including multiple frequency bands, that is, the frequencies of common automobile keys all fall into these N frequency bands. Then, the multiple frequency band data are stored in the main control chip, and the frequency of the key to be tested only needs to be collected through a conventional frequency acquisition module 10 and fed back to the main control chip. The main control chip traverses N frequency bands in turn through a cyclic scanning method to read the corresponding data to compare with the frequency of the key to be tested; when the frequency of the key to be tested falls into a certain frequency band, the average frequency of the frequency band is displayed, indicating that the key to be tested is normal; when the frequency of the key to be tested does not fall into the frequency band, it means that the key to be tested is abnormal, and an abnormal reminder message can be displayed. The user can intuitively judge whether the key to be tested is invalid through the information displayed by the display module. As long as the frequency data is displayed, it means that the key to be tested is normal, and it can also be known that it falls into the frequency band where the displayed average frequency is located. As long as the abnormal reminder information is displayed, the abnormal situation of the key to be tested can be known, and there is no need to look up the relevant detection standards based on the tested frequency data to determine whether the data is normal. The detection device can quickly detect the frequencies of different car keys through a main control chip that stores the frequency range and a conventional frequency acquisition module 10, and it is convenient to intuitively judge whether the key to be tested is valid through the display module.
[0023] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.
[0024] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A car key frequency detection device, characterized in that: include: A main control chip, a frequency acquisition module (10) and a display module, wherein the main control chip is electrically connected to the frequency acquisition module (10) and the display module respectively, wherein the main control chip stores data of multiple frequency bands, wherein the data of the multiple frequency bands include frequencies of automobile key samples of multiple brands / models, wherein the frequency acquisition module (10) acquires the frequency data of the key to be tested and feeds the frequency data back to the main control chip, wherein the main control chip can compare the frequency data with the multiple frequency bands to determine whether the frequency data falls into one of the frequency bands, and if the frequency data falls into one of the frequency bands, the display module displays the average frequency of the frequency band, and if the frequency data does not fall into the frequency band, the display module displays abnormality reminder information.
2. The automobile key frequency detection device according to claim 1, characterized in that: include: A power detection module, the power detection module is electrically connected to the main control chip to detect the battery power of the key to be tested, and the display module can display the detected battery power information.
3. The automobile key frequency detection device according to claim 1, characterized in that: It includes four frequency bands, namely 315MHz±0.6, 433MHz±0.6, 868MHz±0.6, and 902MHz±0.
6.
4. The automobile key frequency detection device according to claim 1, characterized in that: The frequency acquisition module (10) comprises a frequency receiving chip U3 and a filter circuit, wherein the filter circuit is electrically connected to a frequency receiving end of the frequency receiving chip U3.
5. The automobile key frequency detection device according to claim 4, characterized in that: The filtering circuit includes a resistor R265, a resistor R266, a capacitor C150, a capacitor C151 and a capacitor C152, one end of the resistor R265 and one end of the capacitor C150 are respectively electrically connected to the RFIP pin of the frequency receiving chip U3, the other end of the capacitor C150 is respectively electrically connected to one end of the resistor R266 and one end of the capacitor C151, the other end of the resistor R266 and the other end of the resistor R265 are respectively grounded, the other end of the capacitor C151 is electrically connected to one end of the capacitor C152, and the other end of the capacitor C152 is electrically connected to the RFIP pin of the frequency receiving chip U3.
6. The automobile key frequency detection device according to claim 1, characterized in that: The display module is an LCD display screen.