Portable handheld detection terminal and control method

Abstract

The invention discloses a portable handheld detection terminal and a control method. The terminal comprises a control unit, a sound display module and a DSRC data processing module, wherein the control unit is respectively connected with the sound display module and the DSRC data processing module; wherein the DSRC data processing module calculates the position information of the card through a 5.8 GHz radio frequency channel, a double-array element microstrip antenna and a phase difference resolving method, and the position information comprises an incident angle and a distance. The terminal can be installed on a vehicle or a low-altitude unmanned aerial vehicle or other rapid moving vehicles, whether a lost card exists or not is automatically detected through the DSRC technology, the position of the card is rapidly estimated, and therefore a client is efficiently helped to locate and recycle the lost card.

Description

Technical Field

[0001] The invention relates to the technical field of electronic non-stop toll collection, and more specifically to a portable handheld detection terminal and a control method. Background Art

[0002] The ETC (Electronic Toll Collection) handheld detection terminal is a key device in the electronic toll collection system, mainly used to issue and detect OBU (On-Board Unit) devices. The device uses RFID (Radio Frequency Identification) technology to establish a microwave communication link with the on-board radio frequency tag through DSRC (Dedicated Short-Range Communication).

[0003] As the core technology of the ETC system, DSRC technology provides physical transmission channels between RSU (highway road test unit, Roadside Unit), on-board unit, CPC (customer payment card, Customer Payment Card) pass card, etc., and ensures information security. In addition, DSRC technology also has important applications in smart city construction fields such as parking lot management, congestion charging, and Internet of Vehicles. As an advanced communication technology, DSRC requires dedicated RF communication equipment, including 5.8GHz RF IC, processor, RF transceiver link and antenna components. At present, handheld detection terminals are mainly used in ETC business outlets, mobile workstations, high-speed toll stations, ETC parking lots and gas stations, etc., providing OBU card issuance, ETC charging, OBU fault detection, vehicle inspection, special situation charging and other functions.

[0004] However, there are some problems in actual application. Highway owners reported that the CPC card loss rate is high, and some car owners discard the cards due to negligence or intentional, or even intentionally discard the cards to evade tolls. This leads to the loss of tolls and cards, and it is also very difficult to manually find lost cards.

[0005] Therefore, it is necessary to design a new terminal that can be installed on fast-moving vehicles such as vehicles or low-altitude drones. It can automatically detect whether there are lost cards through DSRC technology and quickly estimate the location of the cards, thereby efficiently helping customers locate and recover lost cards. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a portable handheld detection terminal and a control method.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a portable handheld detection terminal, comprising: a control unit, a sound display module and a DSRC data processing module, wherein the control unit is connected to the sound display module and the DSRC data processing module respectively; wherein the DSRC data processing module calculates the location information of the card through a 5.8GHz radio frequency channel, a dual-element microstrip antenna and a phase difference solution method, and the location information includes an incident angle and a distance.

[0008] Its further technical solution is: the DSRC data processing module includes a DSRC data processing control unit, a first 5.8G radio frequency unit, a second 5.8G radio frequency unit, a first low intermediate frequency unit, a second low intermediate frequency unit, a synchronous local oscillator and a dual-pin element microstrip antenna unit; the synchronous local oscillator is connected to the first 5.8G radio frequency unit and the second 5.8G radio frequency unit;

[0009] The first 5.8G RF unit and the second 5.8G RF unit are respectively used to receive and demodulate the RF signal from the dual-element microstrip antenna unit, and convert the RF signal into an intermediate frequency signal through a mixing process; the first low intermediate frequency unit and the second low intermediate frequency unit are respectively used to amplify and filter the intermediate frequency signals from the first 5.8G RF unit and the second 5.8G RF unit; the DSRC data processing control unit is used to receive the signals output by the first low intermediate frequency unit and the second low intermediate frequency unit to calculate the phase difference between the two signals, and solve the incident angle and distance of the signal based on the phase difference.

[0010] Its further technical solution is: the first 5.8G RF unit includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low-pass filter connected in sequence; the second 5.8G RF unit includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low-pass filter connected in sequence; the 5.8G RF transceiver is connected to the dual-needle microstrip antenna unit; the low-pass filter of the first 5.8G RF unit is connected to the first low intermediate frequency unit; the low-pass filter of the second 5.8G RF unit is connected to the second low intermediate frequency unit.

[0011] A further technical solution is: the synchronous local oscillator is connected to the mixer of the first 5.8G radio frequency unit and the mixer of the second 5.8G radio frequency unit respectively.

[0012] Its further technical solution is: the first low intermediate frequency unit and the second low intermediate frequency unit respectively include an intermediate frequency amplifier and an intermediate frequency filter connected in sequence; the intermediate frequency amplifier of the first low intermediate frequency unit is connected to the low pass filter of the first 5.8G radio frequency unit; the intermediate frequency amplifier of the second low intermediate frequency unit is connected to the low pass filter of the second 5.8G radio frequency unit; the intermediate frequency filter is connected to the DSRC data processing control unit.

[0013] A further technical solution is as follows: the dual-element microstrip antenna unit includes two microstrip arrays with a fixed spacing.

[0014] Its further technical solution is: it also includes a power module, a PSAM safety module, a storage module, and a bus communication interface; the power module, the PSAM safety module, the storage module, and the bus communication interface are respectively connected to the control unit.

[0015] Its further technical solution is: it also includes a positioning module; the positioning module is connected to the control unit.

[0016] The present invention also provides a control method using the above-mentioned portable handheld detection terminal, comprising:

[0017] Power on and reset the portable handheld detection terminal and initialize it;

[0018] When there is an external trigger signal, determine whether the signal requires continuous card detection;

[0019] If the signal requires continuous card detection, the DSRC data processing control unit is used to search for the card and calculate the location information of the card;

[0020] Obtaining a unique identifier of the card, and determining whether the card is a new card based on the unique identifier;

[0021] When the card is a new card, the GPS coordinates of the portable handheld detection terminal are obtained, and the location information is bound and uploaded to the background.

[0022] A further technical solution is: the DSRC data processing control unit is used to search for a card and calculate the location information of the card, including:

[0023] In the transmission mode, the DSRC data processing control unit controls the selected 5.8G radio frequency channel and synchronizes the local oscillator signal to transmit data;

[0024] When in receiving mode, the dual-element microstrip antenna unit receives the DSRC signal and generates two independent RF signals;

[0025] The synchronous local oscillator uses an external synchronization mechanism to generate two local oscillator signals with equal phases according to two independent radio frequency signals, and inputs them into the first 5.8G radio frequency unit and the second 5.8G radio frequency unit respectively;

[0026] The first 5.8G radio frequency unit and the second 5.8G radio frequency unit convert the received radio frequency signal into an intermediate frequency signal;

[0027] The intermediate frequency signal is input to the first low intermediate frequency unit and the second low intermediate frequency unit for amplification and filtering, and two low intermediate frequency signals are output;

[0028] The DSRC data processor unit analyzes the two low-intermediate frequency signals, calculates and determines the incident direction and coordinate information of the received signal.

[0029] Compared with the prior art, the present invention has the following beneficial effects: the present invention can realize automatic card detection through DSRC technology by setting a control unit, a sound display module and a DSRC data processing module; the location information of the card, including the incident angle and distance, is calculated by using a 5.8GHz radio frequency channel, a dual-element microstrip antenna and a phase difference solution method. The device can be installed on fast-moving vehicles such as vehicles or low-altitude drones to detect in real time whether there are lost cards; through accurate location information estimation, the terminal can quickly determine the location of the lost card; it helps to efficiently recover lost cards and enhance the customer's convenient experience.

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0032] Figure 1 A schematic block diagram of a portable handheld detection terminal provided by an embodiment of the present invention;

[0033] Figure 2 A schematic block diagram of a DSRC data processing module provided in an embodiment of the present invention;

[0034] Figure 3 A schematic structural diagram of a dual-pin element microstrip antenna unit provided in an embodiment of the present invention;

[0035] Figure 4 A block diagram of a phase difference calculation method provided by an embodiment of the present invention;

[0036] Figure 5A schematic flow chart of a control method for a portable handheld detection terminal provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of a sub-flow diagram of a control method for a portable handheld detection terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0040] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0041] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] The ETC handheld detection terminal is the core equipment in the electronic toll collection system, mainly used for the issuance and detection of OBU equipment. It uses DSRC technology to communicate with the on-board radio frequency tag to ensure the security of information transmission. This technology provides physical transmission channels for highways, parking lots, and vehicle networks, and is widely used. The handheld terminal is mainly used for issuing cards, detecting faults, and inspecting vehicles. It is widely used in ETC business outlets, toll stations, and gas stations. In actual applications, the CPC card loss rate is high, and some car owners deliberately discard the cards to evade charges, resulting in toll losses.

[0043] To this end, an embodiment of the present invention provides a portable handheld detection terminal that can be installed on fast-moving transportation vehicles such as vehicles or low-altitude drones. It can automatically detect whether there are lost cards through DSRC technology and quickly estimate the location of the card, thereby efficiently helping customers locate and recover lost cards.

[0044] Specifically, see Figure 1 , Figure 1 A schematic block diagram of a portable handheld detection terminal provided by an embodiment of the present invention. A portable handheld detection terminal includes: a control unit 10, a sound display module 20 and a DSRC data processing module 30, wherein the control unit 10 is connected to the sound display module 20 and the DSRC data processing module 30 respectively; wherein the DSRC data processing module 30 calculates the location information of a card through a 5.8 GHz radio frequency channel, a dual-element microstrip antenna and a phase difference solution method, and the location information includes an incident angle and a distance.

[0045] In this embodiment, the control unit 10 is the core of the system and is responsible for coordinating and managing the operations of all other modules. It communicates with the DSRC data processing module 30 to obtain transaction information or card detection information, and controls the sound display module 20 for user interaction (such as display information and sound prompts).

[0046] The sound display module 20 is connected to the control unit 10 and is used to provide visual and auditory feedback to the user, ensuring that the operator can intuitively understand the equipment status and results.

[0047] The DSRC data processing module 30 is a key part for realizing wireless communication and position calculation, and is composed of a 5.8GHz radio frequency channel, a dual-element microstrip antenna, and a phase difference calculation method. The task of this module is to receive signals from external DSRC devices (such as on-board units OBU or cards), analyze them, and calculate the target's position information based on the received data, including but not limited to the incident angle θ and the distance S.

[0048] In one embodiment, see Figure 2 The above-mentioned DSRC data processing module 30 includes a DSRC data processing control unit 31, a first 5.8G radio frequency unit 32, a second 5.8G radio frequency unit 33, a first low intermediate frequency unit 34, a second low intermediate frequency unit 35, a synchronous local oscillator 36 and a dual-pin element microstrip antenna unit 37; the synchronous local oscillator 36 is connected to the first 5.8G radio frequency unit 32 and the second 5.8G radio frequency unit 33;

[0049] The first 5.8G RF unit 32 and the second 5.8G RF unit 33 are respectively used to receive and demodulate the RF signal from the dual-element microstrip antenna unit, and convert the RF signal into an intermediate frequency signal through a mixing process; the first low intermediate frequency unit 34 and the second low intermediate frequency unit 35 are respectively used to amplify and filter the intermediate frequency signals from the first 5.8G RF unit 32 and the second 5.8G RF unit 33; the DSRC data processing control unit 31 is used to receive the signals output by the first low intermediate frequency unit 34 and the second low intermediate frequency unit 35 to calculate the phase difference between the two signals, and solve the incident angle and distance of the signal based on the phase difference.

[0050] Specifically, in the transmit mode, one of the channels T1 or T2 can be selected to send signals; in the receive mode, two receive channels are used simultaneously. Each receive channel contains a 5.8G RF transceiver with low intermediate frequency output, a low noise amplifier (LNA), a mixer and a low-pass filter to convert and demodulate the received RF signal. In order to ensure the same phase between the two receive channels, the system generates two equal-phase local oscillator signals L, which are input to the two RF channels respectively.

[0051] like Figure 3 As shown, the dual-element microstrip antenna unit 37 includes two microstrip arrays R1 and R2 with a fixed spacing, which are used to receive radio frequency signals. When the radio frequency signal returned by the card is received, a phase difference PD will be generated on the two elements due to the path difference.

[0052] like Figure 4 As shown, the phase difference PD is calculated using the formula PD = ω*TD = 2πf*TD = 2π*(c / λ)*d*sin(θ) / c = 2π*d*sin(θ) / λ, where d is the distance between the two array elements, θ is the incident angle, and λ is the wavelength of the 5.8GHz signal. The incident angle θ is then determined by θ = arcsin(PD / (2π·n)), where n is a fixed value related to the antenna design.

[0053] According to the time difference t1 of the microwave signal from the card to the antenna and the known propagation speed v, the distance S from the card to the antenna can be calculated by the formula S=t1·v.

[0054] In one embodiment, see Figure 2 The first 5.8G RF unit 32 includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low pass filter connected in sequence; the second 5.8G RF unit 33 includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low pass filter connected in sequence; the 5.8G RF transceiver is connected to the dual-pin element microstrip antenna unit 37; the low pass filter of the first 5.8G RF unit 32 is connected to the first low intermediate frequency unit 34; the low pass filter of the second 5.8G RF unit 33 is connected to the second low intermediate frequency unit 35.

[0055] The first 5.8G radio frequency unit 32 corresponds to the first 5.8G radio frequency channel; the second 5.8G radio frequency unit 33 corresponds to the second 5.8G radio frequency channel.

[0056] In one embodiment, see Figure 2 The synchronous local oscillator 36 is connected to the mixer of the first 5.8G radio frequency unit 32 and the mixer of the second 5.8G radio frequency unit 33 respectively.

[0057] In one embodiment, see Figure 2 The first low intermediate frequency unit 34 and the second low intermediate frequency unit 35 respectively include an intermediate frequency amplifier and an intermediate frequency filter connected in sequence; the intermediate frequency amplifier of the first low intermediate frequency unit 34 is connected to the low pass filter of the first 5.8G radio frequency unit 32; the intermediate frequency amplifier of the second low intermediate frequency unit 35 is connected to the low pass filter of the second 5.8G radio frequency unit 33; the intermediate frequency filter is connected to the DSRC data processing control unit 31.

[0058] The first low intermediate frequency unit 34 corresponds to the first low intermediate frequency channel; the second low intermediate frequency unit 35 corresponds to the second low intermediate frequency channel.

[0059] In one embodiment, see Figure 3 The above-mentioned dual-element microstrip antenna unit includes two microstrip arrays with a fixed spacing.

[0060] Specifically, the DSRC data processing module 30 uses advanced radio frequency and signal processing technologies to ensure efficient and accurate data transmission and reception. Specifically, both 5.8GHz radio frequency channel 1 and channel 2 are equipped with a 5.8GHz radio frequency transceiver with low intermediate frequency output, a low noise amplifier (LNA), a mixer, and a low-pass filter. These components work together to perform frequency conversion demodulation on the received signals of their respective channels. In addition, each radio frequency channel also has a built-in power amplifier (PA) and a ground intermediate frequency 5MHz filter to further optimize the signal quality.

[0061] The first 5.8 GHz RF channel: responsible for frequency conversion demodulation of the signal received by channel 1.

[0062] The second 5.8GHz RF channel is responsible for the frequency conversion demodulation of the signal received by channel 2.

[0063] In order to enhance the quality of the IF signal, two independent low IF channels are set up in the system:

[0064] The first low intermediate frequency channel includes an intermediate frequency amplifier and an intermediate frequency filter, which are used to amplify and filter the intermediate frequency signal S12 obtained from the 5.8 GHz radio frequency channel 1, so as to generate a clearer signal S13.

[0065] The second low intermediate frequency channel is also configured with an intermediate frequency amplifier and an intermediate frequency filter, and is used to process the intermediate frequency signal S22 from the 5.8 GHz radio frequency channel 2 and output the processed signal S23.

[0066] The synchronous local oscillator 36L is a key component of the terminal. It can generate two equal-phase RF local oscillator signals, which is essential to ensure the consistency and accuracy of the received signal. In the transmission mode, one of the T1 or T2 channels is selected as the transmission path by default, and the DSRC data processing control unit 31 directly controls the 5.8 GHz RF channel 1 and the 5.8 GHz RF channel 2, as well as the synchronous local oscillator 36 to perform the data transmission task.

[0067] In receiving mode, the DSRC signal is received through a special dual-element microstrip antenna unit. The antenna unit includes two independent and fixed-spacing microstrip arrays R1 and R2, which receive the RF signals S11 and S21 replied from the card respectively. Subsequently, these signals are assisted by the externally provided synchronous local oscillator 36 signal L, and the RF signals are converted into intermediate frequency signals S12 and S22 using the mixers in their respective 5.8GHz RF channels. These two intermediate frequency signals then enter the corresponding low intermediate frequency channels for further amplification and filtering, and finally obtain S13 and S23 signals. The DSRC data processor unit M will perform in-depth data analysis and phase resolution on these two intermediate frequency signals to determine the incident direction of the received signal and calculate the coordinate information of the DSRC signal.

[0068] See also Figure 4 In this system, the device uses the 5.8GHz RF band, and the DSRC module of the handheld terminal will actively transmit RF signals to wake up the card and receive its feedback signals. When the card is in a fixed position, it will return RF signals, which are received by antenna elements R1 and R2, thereby generating a phase difference. Assuming that the vertical direction of the antenna is 0 degrees, the direction of electromagnetic wave propagation is shown by the arrow, and the RF signal returned by the card has an incident angle θ, with a positive angle on the left and a negative angle on the right. The dotted line represents the electromagnetic wave plane, and the path difference is 0 at all positions on the plane. However, when the signal reaches the antenna, the signal received by the right element R2 will travel a longer path, so the signal will have a longer propagation time and a larger phase difference.

[0069] The calculation formula of phase difference PD is as follows: First, the time delay TD of microwave signal reaching R2 relative to R1 is: Where d is the fixed distance between antenna elements and c is the speed of light.

[0070] The phase difference PD can be calculated from the time delay: Among them, λ is the wavelength of the 5.8GHz signal, and f is the frequency of the signal (5.8GHz). According to the formula, the expression of the phase difference is finally obtained: It can be further expressed as: Where n is a known fixed value representing the antenna beam grating lobe suppression ratio.

[0071] Thus, the relationship between the calculated phase difference and the incident angle θ is: PD = 2π·n·sin(θ);

[0072] The DSRC data processing unit 31 calculates the actual phase difference PD based on the received two intermediate frequency signals S13 and S23 through signal acquisition and internal processing. Ideally, the phase difference between two adjacent antennas should be fixed. The incident angle θ can be calculated through the phase difference PD: Wherein, PD is the phase difference calculated by the DSRC data processing unit 31, and n is the beam grating lobe suppression ratio of the antenna.

[0073] In addition, the distance S from the card signal to the dual-element microstrip antenna unit 37 can be calculated through the time difference t1 between the transmission and reception of the microwave signal and the propagation speed of the RF signal in the air: S=t1·v; where v is the propagation speed of the RF signal in the air.

[0074] In summary, the terminal of this embodiment not only provides an accurate card location positioning function, but also greatly improves the efficiency of users finding lost cards. By introducing an innovative phase difference solution method, the terminal of this embodiment can achieve fast and accurate card location detection in a complex environment, which is of great significance for improving the user experience and service level of the ETC system. In addition, this technical solution also helps to expand the application scenarios of DSRC technology, such as applications within cities or other areas that support 5.8GHz payment, thereby bringing higher economic benefits and social value.

[0075] In one embodiment, see Figure 1 The above-mentioned portable handheld detection terminal also includes a power module 40, a PSAM security module 50, a storage module 60, and a bus communication interface 70; the power module 40, the PSAM security module 50, the storage module 60, and the bus communication interface 70 are respectively connected to the control unit 10.

[0076] In one embodiment, see Figure 1 The above-mentioned portable handheld detection terminal also includes a positioning module 80; the positioning module 80 is connected to the control unit 10.

[0077] Specifically, the power management module supports multiple power input modes, including but not limited to vehicle power and standard adapter power, to ensure that the device can obtain stable power supply in different environments. It provides the required operating voltage for various components of the system, such as the control unit 10, the positioning module 80, the PSAM security module 50, and the sound display module 20, to ensure the stable operation of each module.

[0078] The PSAM security authentication module is specially designed to install an external PSAM card to enhance the security of the DSRC module during data transmission. By implementing a powerful encryption and decryption algorithm, it not only protects the security of the sent and received data, but also ensures the authenticity and reliability of the transaction.

[0079] The data storage module 60 is used to store various data records generated in daily operations to facilitate subsequent data analysis and maintenance management. It is responsible for saving the configuration files required for card positioning to ensure that the latest setting parameters can be accurately loaded each time it is started.

[0080] The positioning service module integrates global satellite navigation systems such as Beidou or GPS, enabling the controller to accurately obtain the location coordinates of the current device, which is particularly important for application scenarios that require precise geographic information, such as vehicle location confirmation in the Electronic Toll Collection (ETC) system.

[0081] The bus communication interface provides a variety of communication port options, such as Ethernet interface or serial interface, for efficient communication with external devices. These interfaces support function selection, protocol level control, and information reading, which enhances the interoperability and expansion capabilities of the system.

[0082] The control unit 10 is responsible for coordinating and managing the logical relationships between all peripheral modules. It not only interacts with the DSRC module to obtain the transaction details of the on-board unit (OBU) or the detection results of the composite pass card (CPC), but also controls the sound display module 20 to emit a prompt sound or display relevant information according to actual needs to improve the user experience.

[0083] The DSRC data processing unit focuses on the data transmission and reception control of the 5.8GHz radio frequency channel, and has the ability to demodulate the signal received from the intermediate frequency channel, especially the accurate analysis of phase information. The unit uses advanced algorithms to calculate the specific location coordinates of the card, thus providing reliable technical support for location-based services (LBS).

[0084] In summary, the portable handheld detection terminal realizes a one-stop solution from power supply, security encryption, data storage to positioning services and communication interfaces through a carefully designed combination of functional modules. It is particularly suitable for application in the field of intelligent transportation, such as ETC automatic payment system, V2X vehicle networking platform, etc., which greatly promotes the improvement of modern urban traffic management efficiency and service level.

[0085] The above-mentioned portable handheld detection terminal can realize automatic card detection through DSRC technology by setting a control unit 10, a sound display module 20 and a DSRC data processing module 30; the location information of the card, including the incident angle and distance, is calculated by using a 5.8GHz radio frequency channel, a dual-element microstrip antenna and a phase difference solution method. The device can be installed on fast-moving vehicles such as vehicles or low-altitude drones to detect whether there are lost cards in real time; through accurate location information estimation, the terminal can quickly determine the location of the lost card; it helps to efficiently recover lost cards and enhance the customer's convenient experience.

[0086] In one embodiment, see Figure 5 , also provides a control method using the above-mentioned portable handheld detection terminal, including steps S110 to S150.

[0087] S110, power on and reset the portable handheld detection terminal and initialize it;

[0088] S120, when there is an external trigger signal, determining whether the signal requires continuous card detection;

[0089] S130: If the signal requires continuous card detection, the DSRC data processing control unit 31 is used to search for the card and calculate the location information of the card.

[0090] In one embodiment, see Figure 6 , the above-mentioned step S130 may include steps S131 to S136.

[0091] S131, in the sending mode, the DSRC data processing control unit 31 controls the selected 5.8G radio frequency channel and synchronizes the local oscillator 36 signal to send data;

[0092] S132, when in receiving mode, the dual-element microstrip antenna unit receives the DSRC signal to generate two independent RF signals;

[0093] S133, the synchronous local oscillator 36 uses an external synchronization mechanism to generate two local oscillator signals with equal phases according to two independent radio frequency signals, and inputs them into the first 5.8G radio frequency unit 32 and the second 5.8G radio frequency unit 33 respectively;

[0094] S134, the first 5.8G radio frequency unit 32 and the second 5.8G radio frequency unit 33 convert the received radio frequency signal into an intermediate frequency signal;

[0095] S135, inputting the intermediate frequency signal to the first low intermediate frequency unit 34 and the second low intermediate frequency unit 35, amplifying and filtering, and outputting two low intermediate frequency signals;

[0096] S136, the DSRC data processor unit analyzes the two low-intermediate frequency signals, calculates and determines the incident direction and coordinate information of the received signal.

[0097] S140, obtaining a unique identifier of the card, and determining whether the card is a new card according to the unique identifier;

[0098] S150: When the card is a new card, obtain the GPS coordinates of the portable handheld detection terminal, bind the location information, and upload it to the background.

[0099] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the control method of the above-mentioned portable handheld detection terminal can refer to the corresponding description in the aforementioned portable handheld detection terminal embodiment, and for the convenience and brevity of description, it will not be repeated here.

[0100] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0101] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0102] The steps in the method of the embodiment of the present invention can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0103] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, terminal, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.

[0104] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A portable handheld detection terminal, characterized in that: include: A control unit, a sound display module and a DSRC data processing module, wherein the control unit is connected to the sound display module and the DSRC data processing module respectively; wherein the DSRC data processing module calculates the location information of the card through a 5.8 GHz radio frequency channel, a dual-element microstrip antenna and a phase difference solution method, wherein the location information includes an incident angle and a distance.

2. A portable handheld detection terminal according to claim 1, characterized in that: The DSRC data processing module includes a DSRC data processing control unit, a first 5.8G radio frequency unit, a second 5.8G radio frequency unit, a first low intermediate frequency unit, a second low intermediate frequency unit, a synchronous local oscillator and a dual-pin element microstrip antenna unit; the synchronous local oscillator is connected to the first 5.8G radio frequency unit and the second 5.8G radio frequency unit; The first 5.8G RF unit and the second 5.8G RF unit are respectively used to receive and demodulate the RF signal from the dual-element microstrip antenna unit, and convert the RF signal into an intermediate frequency signal through a mixing process; the first low intermediate frequency unit and the second low intermediate frequency unit are respectively used to amplify and filter the intermediate frequency signals from the first 5.8G RF unit and the second 5.8G RF unit; the DSRC data processing control unit is used to receive the signals output by the first low intermediate frequency unit and the second low intermediate frequency unit to calculate the phase difference between the two signals, and solve the incident angle and distance of the signal based on the phase difference.

3. A portable handheld detection terminal according to claim 2, characterized in that: The first 5.8G RF unit includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low-pass filter connected in sequence; the second 5.8G RF unit includes a 5.8G RF transceiver, a low noise amplifier, a mixer, and a low-pass filter connected in sequence; the 5.8G RF transceiver is connected to the dual-needle microstrip antenna unit; the low-pass filter of the first 5.8G RF unit is connected to the first low intermediate frequency unit; the low-pass filter of the second 5.8G RF unit is connected to the second low intermediate frequency unit.

4. A portable handheld detection terminal according to claim 3, characterized in that: The synchronous local oscillator is connected to the mixer of the first 5.8G radio frequency unit and the mixer of the second 5.8G radio frequency unit respectively.

5. A portable handheld detection terminal according to claim 4, characterized in that: The first low intermediate frequency unit and the second low intermediate frequency unit respectively include an intermediate frequency amplifier and an intermediate frequency filter connected in sequence; the intermediate frequency amplifier of the first low intermediate frequency unit is connected to the low pass filter of the first 5.8G radio frequency unit; the intermediate frequency amplifier of the second low intermediate frequency unit is connected to the low pass filter of the second 5.8G radio frequency unit; the intermediate frequency filter is connected to the DSRC data processing control unit.

6. A portable handheld detection terminal according to claim 2, characterized in that: The dual-element microstrip antenna unit includes two microstrip arrays with a fixed spacing.

7. A portable handheld detection terminal according to claim 1, characterized in that: It also includes a power module, a PSAM safety module, a storage module, and a bus communication interface; the power module, the PSAM safety module, the storage module, and the bus communication interface are respectively connected to the control unit.

8. The portable handheld detection terminal according to claim 1, characterized in that: It also includes a positioning module; the positioning module is connected to the control unit.

9. A control method using the portable handheld detection terminal according to any one of claims 1 to 8, characterized in that: include: Power on and reset the portable handheld detection terminal and initialize it; When there is an external trigger signal, determine whether the signal requires continuous card detection; If the signal requires continuous card detection, the DSRC data processing control unit is used to search for the card and calculate the location information of the card; Obtaining a unique identifier of the card, and determining whether the card is a new card based on the unique identifier; When the card is a new card, the GPS coordinates of the portable handheld detection terminal are obtained, and the location information is bound and uploaded to the background.

10. A control method for a portable handheld detection terminal according to claim 9, characterized in that: The method of using the DSRC data processing control unit to search for a card and calculate the location information of the card includes: In the transmission mode, the DSRC data processing control unit controls the selected 5.8G radio frequency channel and synchronizes the local oscillator signal to transmit data; When in receiving mode, the dual-element microstrip antenna unit receives the DSRC signal and generates two independent RF signals; The synchronous local oscillator uses an external synchronization mechanism to generate two local oscillator signals with equal phases according to two independent radio frequency signals, and inputs them into the first 5.8G radio frequency unit and the second 5.8G radio frequency unit respectively; The first 5.8G radio frequency unit and the second 5.8G radio frequency unit convert the received radio frequency signal into an intermediate frequency signal; The intermediate frequency signal is input to the first low intermediate frequency unit and the second low intermediate frequency unit for amplification and filtering, and two low intermediate frequency signals are output; The DSRC data processor unit analyzes the two low-intermediate frequency signals, calculates and determines the incident direction and coordinate information of the received signal.

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