Electric quantity detection device of expressway CPC card
After the reader/writer terminal interacts with the CPC card and shuts off the magnetic field, the electromagnetic leakage monitoring device identifies the CPC card's battery level, resolving billing disputes and manual inspection issues caused by low CPC card battery levels. This achieves efficient and accurate battery screening and saves manpower.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2026-03-24
AI Technical Summary
Existing highway composite toll cards (CPC cards) are prone to low battery issues during use, leading to toll disputes and requiring significant manpower for manual detection and identification, thus affecting traffic efficiency.
After the reader/writer terminal interacts with the CPC card, the magnetic field of the card reader coil is turned off. The electromagnetic leakage monitoring device monitors the spectrum information to determine whether there is electromagnetic leakage within a preset frequency range, so as to identify the power status of the CPC card.
It enables efficient and accurate identification of CPC cards with no battery power, improves screening efficiency, saves manpower, and ensures accurate charging and efficient passage.
Smart Images
Figure CN121721371A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the field of intelligent highway traffic technology. More particularly, it relates to a power detection device for a highway CPC card. BACKGROUND
[0002] At present, the development of highways provides convenience for people's daily travel. With the promotion of the work of canceling provincial boundary toll stations, in order to improve the traffic situation of the highway and optimize the charging efficiency of the highway, under the condition that ETC (Electronic Toll Collection) has not been completely popularized nationwide, the highway composite pass card (CPC card) provides highway pass demand for vehicles without ETC installation, and realizes the pass and billing functions of the vehicle.
[0003] In the process of using the existing highway composite pass card (CPC card), the vehicle obtains the composite pass card (CPC card) with transaction information written in at the highway entrance lane, and when the vehicle reaches the highway exit lane, the transaction information written in the composite pass card (CPC card) is read to further calculate the highway fee.
[0004] However, with the large use of the composite pass card (CPC card) and the increase of the use time, it is easy to cause some composite pass cards (CPC cards) to have low power and other quality problems, causing disputes and difficulties in clearing and settling the charges of the vehicle on the highway. In addition, the composite pass cards (CPC cards) with problems need to be detected, recognized and classified by manual operation, and then need to be cancelled, repaired or allocated, which consumes a lot of manpower. SUMMARY
[0005] The purpose of the present disclosure is to provide a highway CPC card power detection device for efficiently screening CPC cards without power, in order to solve at least one of the problems in the prior art.
[0006] In order to achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:
[0007] The present disclosure provides a highway CPC card power detection device, comprising:
[0008] a read-write terminal and an electromagnetic leakage monitoring device;
[0009] The read-write terminal interacts with the CPC card through the read card coil and closes the magnetic field of the read card coil after the data interaction is completed;
[0010] The electromagnetic leakage monitoring device is used to monitor the frequency spectrum information of the CPC card after the magnetic field of the read card coil is closed and to determine whether there is electromagnetic leakage in the preset frequency range in the frequency spectrum information; if yes, the CPC card has power, otherwise the CPC card has no power;
[0011] The monitoring time of the electromagnetic leakage monitoring device is a preset monitoring time.
[0012] Optionally, the preset frequency range is 3MHz to 10MHz.
[0013] Optionally, the preset monitoring time is greater than or equal to 5 seconds.
[0014] Optionally, the electromagnetic leakage monitoring device includes, but is not limited to, a spectrum analyzer or an SDR device.
[0015] Optionally, the CPC card includes a read-write module and a master control module.
[0016] The read-write module is configured to interact with a read-write terminal through a first communication interface.
[0017] The master control module is configured to operate the read-write module through a second communication interface after the magnetic field of the read-write terminal is turned off, to query information of the data interaction.
[0018] Optionally, the read-write module includes an embedded security control module.
[0019] Optionally, the first communication interface includes a 13.56MHz coil.
[0020] Optionally, the 13.56MHz coil is also configured to supply power to the read-write module when the read-write module interacts with the read-write terminal through the first communication interface.
[0021] Optionally, the second communication interface includes an ISO 7816 interface.
[0022] Optionally, the CPC card further includes a battery module.
[0023] The battery module is configured to supply power to the read-write module and the master control module, respectively, after the magnetic field of the read-write terminal is turned off.
[0024] The present disclosure has the following advantages:
[0025] The present disclosure interacts with the CPC card through the read-write terminal, and turns off the magnetic field of the read-write terminal after the data interaction is completed, to trigger the internal data operation of the CPC card, so that the electromagnetic leakage of the CPC card can be generated when the CPC card has power. The electromagnetic leakage monitoring device monitors the spectrum information in the CPC card after the magnetic field of the read-write terminal is turned off, and determines whether the electromagnetic leakage in the preset frequency range exists in the spectrum information, to identify whether the CPC card has power. The present disclosure can automatically identify whether the CPC card has power, improve the screening efficiency of the CPC card without power, and has high identification accuracy and speed, to greatly save labor. BRIEF DESCRIPTION OF DRAWINGS
[0026] The specific embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0027] Figure 1 An overall structure schematic diagram of a power detection device of a highway CPC card is shown.
[0028] Figure 2 A structure schematic diagram of a CPC card is shown.
[0029] Figure 3 A flow chart of a power detection method of a highway CPC card is shown. DETAILED DESCRIPTION
[0030] In order to more clearly illustrate the present disclosure, the present disclosure will be further described below with reference to the embodiments and the accompanying drawings. Similar components are denoted by the same reference numerals in the drawings. It should be understood by those skilled in the art that the specific description below is illustrative rather than limiting, and should not limit the protection scope of the present disclosure.
[0031] As shown in Figure 1 An embodiment of the present disclosure provides a power detection device of a highway CPC card, characterized in that it comprises:
[0032] a read-write terminal and an electromagnetic leakage monitoring device;
[0033] The read-write terminal performs data interaction with an Electronic Toll Collection Card (CPC card) through a card reading coil, and turns off the magnetic field of the card reading coil after the data interaction is completed;
[0034] The electromagnetic leakage monitoring device is used to monitor the frequency spectrum information of the CPC card after the magnetic field of the card reading coil is turned off, and to determine whether there is electromagnetic leakage in a preset frequency range in the frequency spectrum information; if yes, the CPC card has power, otherwise the CPC card has no power;
[0035] The monitoring time of the electromagnetic leakage monitoring device is a preset monitoring time.
[0036] The application realizes the triggering of the internal data operation of the CPC card by reading and writing the terminal and the CPC card and closing the magnetic field of the card reading coil after the data interaction is completed, so that the electromagnetic leakage can be generated when the CPC card has electricity; the spectrum information in the CPC card is monitored by the electromagnetic leakage monitoring device after the magnetic field of the card reading coil is closed, and it is judged whether the electromagnetic leakage in the preset frequency range exists in the spectrum information, so as to realize the identification of whether the CPC card has electricity, improve the screening efficiency of the non-electricity CPC card, and the identification has high precision and speed, which greatly saves the labor.
[0037] In a possible implementation manner, the preset frequency range is 3MHz to 10MHz.
[0038] In a possible implementation manner, the preset monitoring time is greater than or equal to 5 seconds.
[0039] In a possible implementation manner, as shown in Figure 2 The CPC card includes a reading and writing module and a master control module;
[0040] The reading and writing module is used for data interaction with the reading and writing terminal through the first communication interface;
[0041] The master control module is used for operating the reading and writing module through the second communication interface after the magnetic field of the card reading coil of the reading and writing terminal is closed, so as to query the information of the data interaction.
[0042] In a specific embodiment, the reading and writing module in the embodiment mainly is a 13.56M reading and writing module. The module includes an embedded secure control module (ESAM).
[0043] The CPC card further includes a 5.8G reading and writing module. When the vehicle passes through the toll station, the 5.8G reading and writing module can automatically read the vehicle information stored in the CPC card, including the vehicle entry information, path information, etc. This fast reading capability ensures the efficiency and accuracy of vehicle passage. In addition to reading information, the 5.8G reading and writing module can also write the vehicle passage record, payment information and other data into the CPC card. These written data provide an important basis for subsequent billing, clearing and other work. The 5.8G reading and writing module in the CPC card communicates with the path recognition system (such as ETC gantry) on the expressway, and can accurately record the actual driving path of the vehicle. This is crucial for cross-provincial toll billing, ensuring the accuracy and fairness of billing. Based on the read vehicle driving path information, the 5.8G reading and writing module can support the segmented billing function. This means that the toll fees for different road segments can be calculated separately, improving the flexibility and accuracy of billing.
[0044] In a possible implementation, the read-write module comprises an embedded security control module.
[0045] In a possible implementation, the first communication interface comprises a 13.56 MHz coil.
[0046] In a possible implementation, the 13.56 MHz coil is further configured to supply power to the read-write module when the read-write module interacts with the read-write terminal through the first communication interface.
[0047] In a specific embodiment, the CPC card in the present embodiment does not need to be powered by a battery when the read-write terminal interacts with the CPC card through the 13.56 M non-contact mode. Instead, the power is provided by the coil.
[0048] In a possible implementation, the second communication interface comprises an ISO 7816 interface. ISO 7816 is a set of smart card communication protocols formulated by the International Organization for Standardization (ISO), which specifies the physical interface, electrical characteristics and data transmission protocols between a smart card (also known as a contact IC card or chip card) and a card reader.
[0049] In a possible implementation, the CPC card further comprises a battery module.
[0050] The battery module is configured to supply power to the read-write module and the master control module, respectively, after the magnetic field of the card reading coil of the read-write terminal is turned off.
[0051] In a specific embodiment, the ISO 7816 interface comprises a VCC (power supply voltage), a RST (reset signal), a CLK (clock signal), a GND (ground signal) and an IO (data input and output). When the master control unit operates the ESAM through the ISO 7816 interface, a clock signal between 3 MHz and 10 MHz is generated. There are slight differences between different manufacturers of CPC cards. When a stable clock signal between 3 MHz and 10 MHz is generated, the circuit board will have a stable electromagnetic leakage between 3 MHz and 10 MHz.
[0052] In a specific embodiment, the design idea of the present embodiment is as follows:
[0053] When the read / write terminal's read card coil interacts with the 13.56M coil of the CPC card and the ESAM chip, after the data interaction is completed, the read / write terminal will turn off the magnetic field of the read card coil; at this time, if the battery module of the CPC card has electricity, the main control unit of the CPC card will operate the ESAM through the ISO 7816 interface to query relevant information within 5 seconds after the magnetic field is turned off, and during the operation of the main control unit on the ESAM, a clock signal with a frequency of 3MHz to 10MHz will be generated, that is, during the operation of the main control unit on the ESAM, an electromagnetic leakage with a frequency of 3MHz to 10MHz will be generated, and the duration of the clock signal is generally more than 10ms; therefore, the leaked electromagnetic signal can be detected by the electromagnetic leakage monitoring device; and if the battery module of the CPC card has no electricity, there is no electromagnetic leakage.
[0054] As Figure 3 shown, based on this design idea, therefore the working principle of the embodiment is specifically:
[0055] Step S1, the read / write terminal interacts with the CPC card through the read card coil, and turns off the magnetic field of the read card coil after the data interaction is completed;
[0056] Step S2, after the magnetic field of the read card coil is turned off, the frequency spectrum information of the CPC card is monitored by the electromagnetic leakage monitoring device;
[0057] Step S3, it is judged whether there is electromagnetic leakage in the preset frequency range in the frequency spectrum information; if yes, the CPC card has electricity, otherwise the CPC card has no electricity.
[0058] In this way, the CPC card without electricity is screened out.
[0059] In the embodiment, the electromagnetic leakage monitoring device includes but is not limited to a spectrum analyzer or a software defined radio (SDR) device, so the electromagnetic leakage monitoring device in the embodiment can be a spectrum analyzer, an SDR software radio or a spectrum monitoring related device, which is not limited here.
[0060] The SDR device can be an SDR receiver, a portable SDR device or a multi-channel SDR system, as long as it can monitor electromagnetic leakage, which is not limited here, wherein:
[0061] SDR receiver: This is the most basic SDR device, used to receive radio signals and digitize them for subsequent signal processing and analysis. The SDR receiver usually includes an antenna, an analog-to-digital converter (ADC) and software for signal processing.
[0062] Portable SDR devices: These devices are typically designed to be small and lightweight, making them easy to carry and use on-site. They may contain built-in batteries, antennas, and display screens that can show received signals in real-time. For example, some portable devices based on RTL-SDR (using RTL2832U chips for SDR hardware) have been widely used in electromagnetic leakage detection.
[0063] Multi-channel SDR systems: For situations where multiple frequency bands or directions need to be monitored simultaneously for electromagnetic leakage, multi-channel SDR systems are an ideal choice. These systems can simultaneously receive and process signals from multiple antennas, providing comprehensive electromagnetic environment monitoring capabilities.
[0064] It should be noted that the read-write terminal in the present application can be used for CPC card sorting, in which case the read-write terminal can be a CPC card sorting machine; it can also be used at manual windows of toll stations; the electromagnetic leakage monitoring device can use a portable SDR device; therefore, the present application can be used in multiple scenarios, and the present application is not limited.
[0065] It should be noted that the no-electricity CPC card in the present application refers to a CPC card with insufficient electric quantity to support normal use of the CPC card.
[0066] In the description of the present disclosure, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. Unless otherwise specified and limited, the terms "mounting", "connection", and "connection" should be interpreted broadly, for example, they can be fixedly connected, or they can be detachably connected, or integrally connected; they can be mechanically connected, or they can be electrically connected; they can be directly connected, or they can be indirectly connected through an intermediate medium; they can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.
[0067] It should also be noted that, in the description of the present disclosure, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.
[0068] Obviously, the above embodiments of the present disclosure are only examples for clearly illustrating the present disclosure, and are not limitations on the embodiments of the present disclosure. Based on the above description, other different forms of changes or variations can be made by those skilled in the art, and it is impossible to enumerate all the embodiments here. Any obvious changes or variations derived from the technical solutions of the present disclosure are still within the protection scope of the present disclosure.
Claims
1. A power detection device for a highway CPC card, characterized in that, include: Reading and writing terminals and electromagnetic leakage monitoring equipment; The reader / writer terminal interacts with the CPC card via a card reader coil and shuts off the magnetic field of the card reader coil after the data interaction is completed. The electromagnetic leakage monitoring device is used to monitor the spectrum information of the CPC card after the magnetic field of the card reader coil is turned off and to determine whether there is electromagnetic leakage in the spectrum information within a preset frequency range; if so, the CPC card is powered; otherwise, the CPC card is not powered. The monitoring time of the electromagnetic leakage monitoring device is a preset monitoring time.
2. The power detection device according to claim 1, characterized in that, The preset frequency range is 3MHz to 10MHz.
3. The power detection device according to claim 1, characterized in that, The preset monitoring time is greater than or equal to 5 seconds.
4. The power detection device according to claim 1, characterized in that, The electromagnetic leakage monitoring equipment includes, but is not limited to, a spectrum analyzer or an SDR device.
5. The power detection device according to claim 1, characterized in that, The CPC card includes a read / write module and a main control module; The read / write module is used to interact with the read / write terminal through the first communication interface; The main control module is used to operate the reading and writing module through the second communication interface to query information of data interaction after the magnetic field of the card reading coil of the reading and writing terminal is turned off.
6. The power detection device according to claim 5, characterized in that, The read / write module includes an embedded security control module.
7. The power detection device according to claim 5, characterized in that, The first communication interface includes a 13.56MHz coil.
8. The power detection device according to claim 7, characterized in that, The 13.56MHz coil is also used to supply power to the read / write module when the read / write module interacts with the read / write terminal through the first communication interface.
9. The power detection device according to claim 5, characterized in that, The second communication interface includes an ISO 7816 interface.
10. The power detection device according to claim 5, characterized in that, The CPC card also includes a battery module; The battery module is used to supply power to the reading module and the main control module respectively after the magnetic field of the card reading coil of the reading terminal is turned off.