CN110766104A - System and method for detecting number of people in vehicle and compartment - Google Patents
System and method for detecting number of people in vehicle and compartment Download PDFInfo
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- CN110766104A CN110766104A CN201810846613.5A CN201810846613A CN110766104A CN 110766104 A CN110766104 A CN 110766104A CN 201810846613 A CN201810846613 A CN 201810846613A CN 110766104 A CN110766104 A CN 110766104A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
Abstract
The invention discloses a system and a method for detecting the number of people in a vehicle or a carriage, wherein the system comprises the following steps: the vehicle-mounted server sends the people number detection instruction to the reader-writer; receiving the digital signals sent by the reader-writer to determine the number of passengers in the carriage; the reader-writer generates a first radio frequency signal according to the people number detection instruction and sends the first radio frequency signal to the automatic phase modulator; receiving a second radio frequency signal sent by the automatic phase modulator, demodulating the signal to obtain a digital signal, and sending the digital signal to the vehicle-mounted server; the automatic phase modulator is used for performing phase modulation processing on the first radio-frequency signal and sending the first radio-frequency signal to the corresponding antenna array module; receiving a second radio frequency signal sent by the corresponding antenna array module, and sending the signal to the reader-writer; and the antenna array module transmits the phase-modulated first radio-frequency signal to a passenger's riding card, receives a second radio-frequency signal transmitted by the riding card, and transmits the signal to a corresponding automatic phase modulator. The system can accurately determine the number of passengers in the carriage.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a system and a method for detecting the number of people in a carriage and a vehicle with the system.
Background
The number of passengers in the carriage is identified by two techniques: one is a mode of recording head portrait based on shooting of a camera; the other is based on the existing radio frequency identification technology, which is generally developed based on an omnidirectional antenna module, and the actual use effect is not ideal.
The prior art has the disadvantages of unsatisfactory effect and low accuracy for counting people, mainly because the antenna used for detecting the radio frequency identification module is a common omnidirectional antenna (as shown in fig. 1), and the antenna has the characteristics of good directivity but low detection power, for example, under the premise of the same transmission power, the complex environment of a carriage obviously cannot meet the requirement of accurately counting passenger tags, so that the number of people carrying tags in the carriage cannot be accurately determined.
Disclosure of Invention
The present invention is directed to solving at least one of the problems in the art to some extent.
To this end, a first object of the present invention is to provide a system for detecting the number of passengers in a vehicle compartment, which is capable of accurately identifying the number of passengers in the vehicle compartment.
The second purpose of the invention is to provide a method for detecting the number of passengers in the carriage.
A third object of the invention is to propose a vehicle.
In order to achieve the above object, a first embodiment of the present invention provides a system for detecting the number of people in a car, including: the antenna system comprises a vehicle-mounted server, a reader-writer, a plurality of automatic phase modulators and a plurality of antenna array modules, wherein the automatic phase modulators correspond to the antenna array modules one to one; the vehicle-mounted server is used for sending the people number detection instruction to the reader-writer; receiving the digital signals sent by the reader-writer, and determining the number of passengers in the carriage according to the riding card information in the digital numbers; the reader-writer is used for generating a first radio frequency signal according to the people number detection instruction and sending the first radio frequency signal to the automatic phase modulator; receiving the second radio frequency signal sent by the automatic phase modulator, demodulating the second radio frequency signal, and sending the digital signal obtained after demodulation to the vehicle-mounted server; the automatic phase modulator is used for performing phase modulation processing on the first radio-frequency signal and sending the phase-modulated first radio-frequency signal to the corresponding antenna array module; receiving the second radio-frequency signal sent by the corresponding antenna array module, and sending the second radio-frequency signal after phase modulation to the reader-writer; the antenna array module is used for transmitting the first radio-frequency signals after phase modulation to a passenger's riding card, receiving the second radio-frequency signals sent by the riding card, and sending the second radio-frequency signals to the corresponding automatic phase modulator.
The invention discloses a carriage number detection system, which comprises a vehicle-mounted server, a reader-writer, a plurality of automatic phase modulators and a plurality of antenna array modules, wherein the automatic phase modulators and the antenna array modules are in one-to-one correspondence, the vehicle-mounted server sends a number detection instruction to the reader-writer, the reader-writer generates a first radio frequency signal according to the number detection instruction and sends the first radio frequency signal to the automatic phase modulators, the automatic phase modulators phase-modulate the first radio frequency signal and send the phase-modulated first radio frequency signal to the corresponding antenna array modules, the antenna array modules send the phase-modulated first radio frequency signal to a passenger's riding card and receive a second radio frequency signal sent by the riding card and send the second radio frequency signal to the corresponding automatic phase modulators, when the automatic phase modulators receive the second radio frequency signal sent by the corresponding antenna array modules, and when receiving the digital signal sent by the reader-writer, the vehicle-mounted server determines the number of passengers in the carriage according to the information of the riding card in the digital signal. Therefore, the system can accurately determine the number of passengers in the carriage.
In addition, the system for detecting the number of people in the car according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the in-vehicle server is specifically configured to: and periodically sending the people number detection instruction to the reader-writer, or receiving a starting instruction of a user, and sending the people number detection instruction to the reader-writer according to the starting instruction.
According to an embodiment of the present invention, the in-vehicle server is specifically configured to: carrying out duplicate removal processing on the riding card information in the digital signal; and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
According to one embodiment of the invention, the number of the automatic phase modulators is 4, the number of the antenna array modules is 4, and the reader-writer is a 4-channel reader-writer.
According to an embodiment of the present invention, the above-mentioned detection system further includes: the system comprises a switch and a display screen; the switchboard is used for receiving the number of the passengers in the carriage sent by the vehicle-mounted server and sending the number of the passengers in the carriage to the display screen; and the display screen is used for displaying the number of passengers in the carriage.
In order to achieve the above object, a second embodiment of the present invention provides a method for detecting the number of people in a car, including the following steps: the vehicle-mounted server sends the people number detection instruction to the reader-writer; the reader generates a first radio frequency signal according to the people number detection instruction and sends the first radio frequency signal to an automatic phase modulator; the automatic phase modulator is used for performing phase modulation processing on the first radio-frequency signal and sending the phase-modulated first radio-frequency signal to a corresponding antenna array module; the antenna array module transmits the first radio-frequency signals after phase modulation to a passenger riding card, receives the second radio-frequency signals transmitted by the riding card, and transmits the second radio-frequency signals to the corresponding automatic phase modulator; the automatic phase modulator sends the second radio frequency signal to the reader-writer; the reader-writer demodulates the second radio frequency signal and sends a digital signal obtained after demodulation to the vehicle-mounted server; and the vehicle-mounted server determines the number of passengers in the carriage according to the riding card information in the digital signal.
According to the method for detecting the number of people in the carriage, the vehicle-mounted server sends a number detection instruction to the reader-writer, the reader-writer generates a first radio frequency signal according to the number detection instruction and sends the first radio frequency signal to the automatic phase modulator, the automatic phase modulator performs phase modulation on the first radio frequency signal and sends the phase modulated first radio frequency signal to the corresponding antenna array module, the antenna array module transmits the phase modulated first radio frequency signal to a passenger riding card and receives a second radio frequency signal sent by the riding card and sends the second radio frequency signal to the corresponding automatic phase modulator, and the automatic phase modulator sends the second radio frequency signal to the reader-writer; the reader-writer demodulates the second radio frequency signal, and sends the digital signal obtained after demodulation to the vehicle-mounted server, and the vehicle-mounted server determines the number of passengers in the carriage according to the information of the riding card in the digital signal. Therefore, the method can accurately determine the number of passengers in the carriage.
In addition, the method for detecting the number of people in the car according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the vehicle-mounted server sends the people number detection instruction to the reader-writer, and the method comprises the following steps: the vehicle-mounted server periodically sends the people number detection instruction to the reader-writer; or the vehicle-mounted server receives a starting instruction of a user and sends the people number detection instruction to the reader-writer according to the starting instruction.
According to one embodiment of the invention, the determining the number of passengers in the compartment by the vehicle-mounted server according to the riding card information in the digital signal comprises the following steps: the vehicle-mounted server performs duplicate removal processing on the riding card information in the digital signal; and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
According to an embodiment of the present invention, the method for detecting the number of people in the car further includes: the exchanger receives the number of the passengers in the carriage sent by the vehicle-mounted server and sends the number of the passengers in the carriage to a display screen; and the display screen is used for displaying the number of passengers in the carriage.
In order to achieve the above object, a third embodiment of the present invention provides a vehicle including the above passenger compartment number detection system.
According to the vehicle provided by the embodiment of the invention, the number of passengers in the carriage can be accurately determined through the detection system for the number of passengers in the carriage.
Drawings
Fig. 1 is a schematic view of a general omni-directional antenna in the related art;
FIG. 2 is a block diagram of a system for detecting the number of persons in a compartment according to an embodiment of the present invention;
fig. 3 is a schematic view of the installation of a plurality of antenna array modules on a vehicle cabin according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a system for detecting the number of people in a compartment, according to one embodiment of the present invention;
FIG. 5 is a flow chart of a method of detecting a number of people in a car according to one embodiment of the invention; and
fig. 6 is a flowchart of a method of detecting the number of persons in a car according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A system for detecting the number of persons in a vehicle, a method for detecting the number of persons in a vehicle, and a vehicle having the system according to embodiments of the present invention will be described below with reference to the accompanying drawings.
Before introducing the system for detecting the number of people in a car according to the embodiment of the present invention, how to improve the recognition effect in terms of the antenna performance standard will be described.
There are two types of improvements in the recognition effect in terms of antenna performance criteria: one is to improve tag antenna performance; another is to improve reader antenna performance. The parameter of the performance of the tag antenna is the reading distance r of the tag antenna, the tag antenna has a gain of at least more than 0dB in order to guarantee a longer reading distance r, meanwhile, for a circuit formed by the tag antenna and a tag chip, a higher power transmission coefficient is required from the tag antenna to the tag chip, and a higher power transmission system is realized by better matching of the tag antenna and a new tag product. Secondly, in terms of the design requirements of the tag antenna, the tag is shaped and sized to be embedded in or attached to the object to be identified, or the tag antenna is attached to the inside of the printed tag. In addition, the manufacturing cost of the tag must be controlled, which requires the tag antenna to be simple in structure. Therefore, it is unlikely that the accuracy of reading information is improved solely from the tag antenna in the tag carried by the passenger.
Therefore, the accuracy of information reading is improved from the antenna at the reader end, the antenna of the reader after the adjustment enables the signal coverage of the whole system to be wide, the signal penetrating power to be strong, the information acquisition to be accurate, and the phased array electromagnetic signal electromagnetic space scanning has no dead angle. The improved reader-writer antenna has strong penetrating power, and can be used as an example of gain, the gain of a general omnidirectional antenna is 0dB, and the gain of the improved reader-writer antenna can reach 15 dB.
Fig. 2 is a block diagram of a system for detecting the number of persons in a vehicle compartment according to an embodiment of the present invention. As shown in fig. 2, a system for detecting the number of people in a car according to an embodiment of the present invention includes: the antenna array module comprises a vehicle-mounted server 10, a reader-writer 20, a plurality of automatic phase modulators 30 and a plurality of antenna array modules 40, wherein the automatic phase modulators 30 correspond to the antenna array modules 40 one to one.
The vehicle-mounted server 10 is configured to send a people number detection instruction to the reader/writer 20; receives the digital signal transmitted from the reader/writer 20, and determines the number of passengers in the vehicle compartment based on the card information in the digital signal.
It can be understood that the vehicle-mounted server 10 described in this embodiment is a platform for storing system software, and the software mainly realizes the functions of sending an automatic start passenger number detection instruction to the reader/writer 20, receiving and comparing passenger card information in a carriage, such as ID (identification) information, from the reader/writer 20, realizing a passenger number accumulation algorithm, outputting the passenger number information through a network, and the like. The in-vehicle server 10 and the reader/writer 20 are connected by a data connection line such as a serial line to communicate with each other. In practical applications, the onboard server 10 may be replaced by a control computer.
The reader-writer 20 is used for generating a first radio frequency signal according to the people number detection instruction and sending the first radio frequency signal to the automatic phase modulator 30; and receiving the second radio frequency signal sent by the automatic phase modulator 30, demodulating the second radio frequency signal, and sending the digital signal obtained after demodulation to the vehicle-mounted server 10.
As a specific example, the reader/writer 20 may be a 4-channel reader/writer. The 4-channel reader-writer is a reader-writer which can be simultaneously connected with 4-channel radio frequency channels, and the 4-channel reader-writer can realize 4-channel communication through a pair of four power dividers and can also realize 4-channel communication by sequentially opening each radio frequency channel through software. The 4-channel reader-writer can awaken the riding card of a passenger in the carriage by connecting the 4-channel antenna array module 40, so that the riding card becomes an active tag to read riding card information, not only can read the ID information of the riding card, but also can read data in a storage area of the riding card; not only can the information of a single bus card be read, but also the information of a plurality of bus cards in the range of antenna waves can be simultaneously read. In addition, the reader/writer 20 has a data serial port, and can be connected to a controller or a PC through a standard communication interface, such as an RS232 interface, to perform data communication exchange.
The automatic phase modulator 30 is configured to perform phase modulation on the first radio frequency signal, and send the phase-modulated first radio frequency signal to the corresponding antenna array module 40; receive the second rf signal sent by the corresponding antenna array module 40, and send the second rf signal to the reader/writer 20. That is, the auto phase modulator 30 can implement the phase modulation processing effect on the radio frequency signal sent by the reader/writer 20 by setting preset software.
It should be noted that the number of the plurality of auto-condensers 30 may be set according to actual needs. As a specific example, the plurality of auto phase modulators 30 is 4 in number, and may be, for example, a first auto phase modulator 31, a second auto phase modulator 32, a third auto phase modulator 33, and a fourth auto phase modulator 34, respectively.
The antenna array module 40 is configured to transmit the phase-modulated first radio frequency signal to a passenger's riding card, receive a second radio frequency signal transmitted by the riding card, and transmit the second radio frequency signal to the corresponding auto phase modulator 30. That is, the antenna array module 40 can realize automatic scanning of the electromagnetic beam in the space (car). The antenna array module 40 is directly connected to the auto phase modulator 30 to correspondingly receive the radio frequency signals with continuously changed phases, and simultaneously, due to the reciprocity principle of the antennas, the antenna array module 40 continuously feeds back the riding card information of passengers to the corresponding auto phase modulator 30.
As a specific example, the number of the antenna array modules 40 is 4, for example, the antenna array modules may be a first antenna array module 41, a second antenna array module 42, a third antenna array module 43, and a fourth antenna array module 44, and the first auto-phase modulator 31, the second auto-phase modulator 32, the third auto-phase modulator 33, and the fourth auto-phase modulator 34 are disposed in one-to-one correspondence with the first antenna array module 41, the second antenna array module 42, the third antenna array module 43, and the fourth antenna array module 44.
Referring to fig. 3, the first antenna array module 41, the second antenna array module 42, the third antenna array module 43, and the fourth antenna array module 44 of the antenna array module 40 may be disposed at four positions on the front, rear, left, and right sides of the vehicle compartment, and preferably, the first antenna array module 41, the second antenna array module 42, the third antenna array module 43, and the fourth antenna array module 44 are disposed at the center position of each side of the vehicle compartment. According to the phased array technology, the antenna array module 40 can achieve single-dimensional 180-degree electromagnetic coverage and strong coverage above 135 degrees, so that the system is known to be electromagnetic beam transmission without dead angles.
According to an embodiment of the present invention, the onboard server 10 is specifically configured to: the people number detection instruction is periodically sent to the reader/writer 20, or the user start instruction is received, and the people number detection instruction is sent to the reader/writer 20 according to the start instruction.
Specifically, when the number of passengers in the vehicle needs to be determined, the user may actively send a start instruction to the vehicle-mounted server 10, for example, remotely send the start instruction to the vehicle-mounted server 10 through a terminal device such as a mobile phone, or send the start instruction to the vehicle-mounted server 10 through a button disposed in the vehicle, and then the vehicle-mounted server 10 sends a number detection instruction to the reader/writer 20 through a serial port line medium; the user may also set in advance that the in-vehicle server 10 periodically (e.g., every ten minutes) sends the people number detection instruction to the reader/writer 20 through the serial line medium.
After receiving the passenger number detection command, the reader/writer 20 starts a program for identifying the information of the bus card and transmits a first radio frequency signal for activating the bus card to the auto phase modulator 30. When the first rf signal is phase-modulated by the auto phase modulator 30, the phase of the first rf signal changes according to a predetermined rule of the auto phase modulator 30, so that the phase of the first rf signal also changes according to a predetermined phase. The first rf signal is phase modulated and then sent to the antenna array module 40 through the rf path between the auto phase modulator 30 and the antenna array module 40. The antenna array module 40 sends the phase change of the first radio-frequency signal after phase modulation to the radio-frequency channel to realize space scanning of approximately 180 degrees, so that electromagnetic waves irradiate the passenger car card, the passenger car card is activated to realize an active state, and a second radio-frequency signal with the car card is sent back to the antenna array module 40 along the radio-frequency channel.
After receiving the second rf signal, the antenna array module 40 sends the second rf signal to the corresponding auto phase modulator 30. After receiving the second radio frequency signal sent by the corresponding antenna array module 40, the automatic phase modulator 30 directly sends the second radio frequency signal to the reader/writer 20, so as to implement spatial reading of the second radio frequency signal of the riding card. The reader/writer 20 demodulates the second radio frequency signal to obtain a digital signal with the information of the riding card, and transmits the digital signal back to the onboard server 10 through the serial port line.
According to an embodiment of the present invention, the onboard server 10 is specifically configured to: carrying out duplicate removal processing on the riding card information in the digital signal; and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
That is, after receiving the digital signal with the riding card information obtained after the second radio frequency signal is demodulated by the reader/writer 20, the in-vehicle server 10 performs deduplication processing on the riding card information in the digital signal, for example, a series of algorithms such as screening and accumulating the riding card information, and finally determines the number of passengers in the vehicle cabin, so that a reading process can be realized once.
Therefore, the system has strong signal penetrating power and can realize better identification performance, so that the number of passengers in the carriage can be detected more quickly and accurately.
Further, as shown in fig. 4, the above passenger compartment number detection system further includes: a switch 50 and a display screen 60. The switch 50 is configured to receive the number of passengers in the vehicle cabin transmitted by the vehicle-mounted server 10, and transmit the number of passengers in the vehicle cabin to the display screen 60, where the display screen 60 is configured to display the number of passengers in the vehicle cabin.
It should be noted that the hanging position of the display screen 60 described in this embodiment can be selected from various options, such as hanging outside the vehicle cabin or hanging inside the vehicle cabin. The display screen 60 is provided with a switch board card, and can be connected with the switch 50 through a network cable. The switch 50 connects the display screen 60 and the in-vehicle server 10, and functions to connect the display screen 50 and the in-vehicle server 10.
Specifically, when the display screen 60 is hung outside the carriage, the display screen 60 can provide the number of passengers in the carriage for passengers and operators at the platform, so as to guide the passengers to get on the vehicle; when the display screen 60 is hung on the inside, the display screen 60 can provide the number of passengers in the vehicle compartment and crew members with the number of passengers in the vehicle compartment.
In order to make the present invention more clear to those skilled in the art, as shown in fig. 5, the method for detecting the number of people in a car includes the following steps:
and S101, the workstation sends a people number detection instruction to the radio frequency reader-writer.
S102, the radio frequency reader-writer transmits a radio frequency signal to the automatic phase modulator.
And S103, the automatic phase modulator automatically modulates the radio frequency signal and transmits the radio frequency signal to the antenna array module.
And S104, the antenna array module transmits the radio-frequency signals after phase modulation to the riding card of the passenger.
And S105, activating the bus card, and transmitting the information of the bus card back to the antenna array module in a radio frequency signal mode.
S106, the antenna array module transmits the radio frequency signal back to the reader-writer.
And S107, the reader demodulates the radio frequency signal, takes the bus card information and transmits the bus card information back to the workstation for people number confirmation.
And S108, detecting whether the information of the vehicle card is repeated or not by the workstation. If yes, returning to the step S107; if not, step S109 is performed.
And S109, the work station carries out duplicate removal processing on the information of the bus cards and accumulates the number of passengers.
And S110, after the counting period of the workstation is finished, the information of the number of people is transmitted to the switchboard.
And S111, the exchanger transmits the information of the number of people to a display screen for display.
To sum up, the system for detecting the number of people in a carriage of the embodiment of the invention comprises a vehicle-mounted server, a reader-writer, a plurality of automatic phase modulators and a plurality of antenna array modules, wherein the plurality of automatic phase modulators and the plurality of antenna array modules are in one-to-one correspondence, the vehicle-mounted server sends a number detection instruction to the reader-writer, the reader-writer generates a first radio frequency signal according to the number detection instruction and sends the first radio frequency signal to the automatic phase modulators, the automatic phase modulators perform phase modulation on the first radio frequency signal and send the phase modulated first radio frequency signal to the corresponding antenna array modules, the antenna array modules send the phase modulated first radio frequency signal to a passenger's riding card and receive a second radio frequency signal sent by the riding card and send the second radio frequency signal to the corresponding automatic phase modulators, when the automatic phase modulators receive the second radio frequency signal sent by the corresponding antenna array modules, and when receiving the digital signal sent by the reader-writer, the vehicle-mounted server determines the number of passengers in the carriage according to the information of the riding card in the digital signal. Therefore, the system can accurately detect the number of the passengers in the carriage.
Fig. 6 is a flowchart of a method of detecting the number of persons in a car according to an embodiment of the present invention. As shown in fig. 6, the method for detecting the number of people in a car according to the embodiment of the present invention includes the following steps:
and S1, the vehicle-mounted server sends the people number detection instruction to the reader-writer.
And S2, generating a first radio frequency signal by the reader according to the people number detection instruction, and sending the first radio frequency signal to the automatic phase modulator.
And S3, the automatic phase modulator phase-modulates the first radio-frequency signal and sends the phase-modulated first radio-frequency signal to the corresponding antenna array module.
And S4, the antenna array module transmits the phase-modulated first radio-frequency signal to a passenger' S riding card, receives a second radio-frequency signal transmitted by the riding card, and transmits the second radio-frequency signal to a corresponding automatic phase modulator.
S5, the auto phase modulator sends the second rf signal to the reader.
And S6, the reader demodulates the second radio frequency signal, and sends the digital signal obtained after demodulation to the vehicle-mounted server.
And S7, the vehicle-mounted server determines the number of passengers in the carriage according to the riding card information in the digital signal.
According to one embodiment of the invention, the vehicle-mounted server sends the people number detection instruction to the reader-writer, and the method comprises the following steps: the vehicle-mounted server periodically sends the people number detection instruction to the reader-writer; or the vehicle-mounted server receives a starting instruction of the user and sends the people number detection instruction to the reader-writer according to the starting instruction.
According to one embodiment of the invention, the vehicle-mounted server determines the number of passengers in the compartment according to the riding card information in the digital signal, and the method comprises the following steps: the vehicle-mounted server performs duplicate removal processing on the riding card information in the digital signal; and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
Further, the method for detecting the number of people in the carriage further comprises the following steps: the exchanger receives the number of passengers in the carriage sent by the vehicle-mounted server and sends the number of passengers in the carriage to the display screen; and the display screen is used for displaying the number of passengers in the carriage.
It should be noted that, details that are not disclosed in the method for detecting the number of people in a car according to the embodiment of the present invention refer to details that are disclosed in the system for detecting the number of people in a car according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
In summary, according to the method for detecting the number of people in the carriage, the vehicle-mounted server sends a number detection instruction to the reader-writer, the reader-writer generates a first radio frequency signal according to the number detection instruction and sends the first radio frequency signal to the automatic phase modulator, the automatic phase modulator performs phase modulation on the first radio frequency signal and sends the phase-modulated first radio frequency signal to the corresponding antenna array module, the antenna array module sends the phase-modulated first radio frequency signal to a passenger's riding card and receives a second radio frequency signal sent by the riding card and sends the second radio frequency signal to the corresponding automatic phase modulator, and the automatic phase modulator sends the second radio frequency signal to the reader-writer; the reader-writer demodulates the second radio frequency signal, and sends the digital signal obtained after demodulation to the vehicle-mounted server, and the vehicle-mounted server determines the number of passengers in the carriage according to the information of the riding card in the digital signal. Therefore, the method can accurately detect the number of the passengers in the carriage.
Based on the above embodiment, the invention further provides a vehicle, which comprises the above passenger compartment number detection system.
According to the vehicle provided by the embodiment of the invention, the number of the passengers in the carriage can be accurately detected by the detection system for the number of the passengers in the carriage.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A system for detecting the number of people in a carriage, comprising: the antenna system comprises a vehicle-mounted server, a reader-writer, a plurality of automatic phase modulators and a plurality of antenna array modules, wherein the automatic phase modulators correspond to the antenna array modules one to one;
the vehicle-mounted server is used for sending the people number detection instruction to the reader-writer; receiving the digital signal sent by the reader-writer, and determining the number of passengers in the carriage according to the riding card information in the digital signal;
the reader-writer is used for generating a first radio frequency signal according to the people number detection instruction and sending the first radio frequency signal to the automatic phase modulator; receiving a second radio frequency signal sent by the automatic phase modulator, demodulating the second radio frequency signal, and sending the digital signal obtained after demodulation to the vehicle-mounted server;
the automatic phase modulator is used for performing phase modulation processing on the first radio-frequency signal and sending the phase-modulated first radio-frequency signal to the corresponding antenna array module; receiving the second radio-frequency signal sent by the corresponding antenna array module, and sending the second radio-frequency signal to the reader-writer;
the antenna array module is used for transmitting the first radio-frequency signals after phase modulation to a passenger's riding card, receiving the second radio-frequency signals sent by the riding card, and sending the second radio-frequency signals to the corresponding automatic phase modulator.
2. The detection system according to claim 1, wherein the on-board server is specifically configured to:
and periodically sending the people number detection instruction to the reader-writer, or receiving a starting instruction of a user, and sending the people number detection instruction to the reader-writer according to the starting instruction.
3. The detection system according to claim 1, wherein the on-board server is specifically configured to:
carrying out duplicate removal processing on the riding card information in the digital signal;
and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
4. The detection system according to claim 1, wherein the number of the auto phase modulators is 4, the number of the antenna array modules is 4, and the reader/writer is a 4-channel reader/writer.
5. The detection system of claim 1, further comprising: the system comprises a switch and a display screen;
the switchboard is used for receiving the number of the passengers in the carriage sent by the vehicle-mounted server and sending the number of the passengers in the carriage to the display screen;
and the display screen is used for displaying the number of passengers in the carriage.
6. A method for detecting the number of people in a carriage is characterized by comprising the following steps:
the vehicle-mounted server sends the people number detection instruction to the reader-writer;
the reader generates a first radio frequency signal according to the people number detection instruction and sends the first radio frequency signal to an automatic phase modulator;
the automatic phase modulator is used for performing phase modulation processing on the first radio-frequency signal and sending the phase-modulated first radio-frequency signal to a corresponding antenna array module;
the antenna array module transmits the first radio-frequency signals after phase modulation to a passenger riding card, receives the second radio-frequency signals transmitted by the riding card, and transmits the second radio-frequency signals to the corresponding automatic phase modulator;
the automatic phase modulator sends the second radio frequency signal to the reader-writer;
the reader-writer demodulates the second radio frequency signal and sends a digital signal obtained after demodulation to the vehicle-mounted server;
and the vehicle-mounted server determines the number of passengers in the carriage according to the riding card information in the digital signal.
7. The detection method according to claim 6, wherein the vehicle-mounted server sends the people number detection instruction to a reader-writer, and the method comprises the following steps:
the vehicle-mounted server periodically sends the people number detection instruction to the reader-writer; alternatively, the first and second electrodes may be,
the vehicle-mounted server receives a starting instruction of a user and sends the people number detection instruction to the reader-writer according to the starting instruction.
8. The detection method according to claim 6, wherein the determining, by the on-board server, the number of passengers in the vehicle compartment according to the riding card information in the digital signal comprises:
the vehicle-mounted server performs duplicate removal processing on the riding card information in the digital signal;
and determining the number of passengers in the carriage according to the ride card information after the weight removal processing.
9. The detection method according to claim 6, further comprising:
the exchanger receives the number of the passengers in the carriage sent by the vehicle-mounted server and sends the number of the passengers in the carriage to a display screen;
and the display screen is used for displaying the number of passengers in the carriage.
10. A vehicle, characterized by comprising: a system for detecting the number of people in a compartment as claimed in any one of claims 1 to 5.
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| CN201810846613.5A CN110766104B (en) | 2018-07-27 | 2018-07-27 | System and method for detecting number of people in vehicle and compartment |
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| CN201810846613.5A CN110766104B (en) | 2018-07-27 | 2018-07-27 | System and method for detecting number of people in vehicle and compartment |
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