Method and system for automatically monitoring vehicle operation status in a site

Abstract

The present invention discloses a method and system for automatically monitoring the operating status of vehicles in a site. The method includes: affixing a unique RFID tag to each vehicle entering the site; and providing a unique antenna for transmitting and receiving RFID tag signals at each loading and unloading position in the site; judging the operating status of the vehicle based on the strength, frequency, and speed of the signals received by the antennas provided at each loading and unloading position in the site from the time the vehicle enters the site to the time it leaves the site; the vehicle operating status includes arrival at the loading and unloading position, switching between loading and unloading positions, and leaving the loading and unloading position. The technical solution of the present invention can accurately locate the position and time of a vehicle's stop at a loading and unloading position, facilitate segmented travel analysis, and display the vehicle's stop status at each loading and unloading position in real time, thereby optimizing the queuing and parking arrangements of vehicles in the site, improving the operational efficiency of vehicles in the site, and reducing unnecessary waste of manpower and transportation capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle monitoring, and in particular to a method and system for automatically monitoring the running status of vehicles in a site. Background Art

[0002] With the rapid development of the logistics industry, logistics companies are expanding in size. The need to accurately locate vehicle movements within logistics parks and efficiently utilize transportation resources is becoming increasingly prominent, even becoming a core competitive advantage for companies in the industry. However, monitoring the arrival and departure of vehicles at loading and unloading bays is currently done manually through observation and statistics, which cannot accurately reflect the arrival status of vehicles at the bays. Furthermore, existing vehicle GPS positioning technology is unreliable due to factors such as poor vehicle movement signals, equipment damage, and positional offsets. This prevents dispatchers within logistics parks from accurately understanding the usage of loading and unloading bays, resulting in a waste of transportation capacity. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention provide a method and system for automatically monitoring the operating status of vehicles in a site, which overcome the above problems or at least partially solve the above problems.

[0004] According to one aspect of an embodiment of the present invention, a method for automatically monitoring the operating status of vehicles in a site is provided, comprising:

[0005] Each vehicle entering the site is affixed with a unique RFID tag, and each loading and unloading location within the site is equipped with a unique antenna for transmitting and receiving RFID tag signals. From the time a vehicle enters the site to the time it leaves the site, the vehicle's operating status is determined based on the strength, frequency, and speed of the signals received by the antennas installed at each loading and unloading location within the site. The vehicle's operating status includes arrival at a loading and unloading location, switching between loading and unloading locations, and leaving a loading and unloading location.

[0006] Furthermore, the operation status of the vehicle arriving at the loading and unloading position is determined, including:

[0007] Polling all antennas to monitor whether an RFID tag signal is received for a first preset time period;

[0008] If so, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna that has received the RFID tag signal for the first preset time period; if there are multiple antennas that have received the RFID tag signal for the first preset time period, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna that receives the signal the most times.

[0009] Furthermore, within a second preset time period after determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the vehicle is monitored for arrival stability, including:

[0010] If the signal is received continuously and the number of times by the antenna corresponding to the loading and unloading position where the vehicle arrives is the largest, it is finally determined that the vehicle has arrived at the loading and unloading position;

[0011] If the signal reception continues but the antenna with the most reception times is not the antenna corresponding to the loading and unloading position that the vehicle has arrived at, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna with the most reception times, and arrival stability monitoring is performed.

[0012] Furthermore, during the arrival stability monitoring, if no antenna receives the RFID tag signal corresponding to the arriving vehicle or the received signal is discontinuous, the original judgment on the vehicle's arrival at the loading and unloading position is canceled and the vehicle's arrival at the loading and unloading position operating status judgment is performed again.

[0013] Furthermore, the vehicle loading and unloading position switching operation state judgment includes:

[0014] After determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the arriving vehicle is monitored with a second preset time length as the polling cycle;

[0015] During the polling cycle, if signal reception continues but the antenna with the most reception times is not the antenna corresponding to the loading and unloading position the vehicle has arrived at, obtain the vehicle speed. If the vehicle speed is greater than 0, the vehicle loading and unloading position is determined to be switched to the loading and unloading position corresponding to the antenna with the most reception times. If the vehicle speed is 0, no loading and unloading position switching is determined.

[0016] Furthermore, the operation status of the vehicle leaving the loading and unloading position is determined, including:

[0017] After determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the arriving vehicle is monitored with a second preset time length as the polling cycle;

[0018] During the polling cycle, when no antenna receives the RFID tag signal corresponding to the arriving vehicle, the vehicle speed is obtained. If the vehicle speed is greater than 0, it is determined that the vehicle has left. If the vehicle speed is 0, the vehicle speed and its corresponding RFID tag signal are continuously monitored within a third preset time period. If the vehicle speed is greater than 0 or there is no signal during this period, it is determined that the vehicle has left. Otherwise, the vehicle's operating status is maintained as having arrived at the loading and unloading position.

[0019] Furthermore, a judgment is made as to whether the vehicle has left the loading and unloading position. When no antenna receives the RFID tag signal corresponding to the arriving vehicle, before obtaining the vehicle speed, including within the fourth preset time period, if the RFID tag signal corresponding to the vehicle is received again, the vehicle operating status is maintained as the judgment of arriving at the loading and unloading position.

[0020] According to another aspect of an embodiment of the present invention, a system for automatically monitoring the operating status of vehicles in a site is provided, the system comprising:

[0021] RFID tags are set on the vehicles entering the venue and are uniquely matched;

[0022] Antenna, installed at the loading and unloading position of the site, used to transmit and receive RFID tag signals;

[0023] A reader / writer, configured to collect RFID tag signals received by the antenna and send them to a processing terminal;

[0024] The vehicle terminal is used to obtain the vehicle speed and send it to the processing terminal;

[0025] The processing terminal is used to determine the vehicle's operating status based on the strength, number of signals received by the antenna and the vehicle's speed; the vehicle's operating status includes arrival at the loading and unloading position, switching between loading and unloading positions, and leaving the loading and unloading position.

[0026] Furthermore, the processing terminal includes:

[0027] RFID tag signal module, used to control the power, naming, opening and closing of the antenna, and send the received RFID tag signal to the processing module;

[0028] The processing module is used to determine the vehicle's operating status based on the strength and number of signals received by the antenna and the vehicle's speed.

[0029] Furthermore, the automatic monitoring system for vehicle operation status in the site also includes

[0030] The RFID handheld terminal is used to enter, replace and unbind the binding between the RFID tag and the vehicle, and send the binding information to the processing terminal.

[0031] The present invention provides a method and system for automatically monitoring the operating status of vehicles within a site. By attaching a unique RFID tag to a vehicle entering the site, and providing a unique antenna for transmitting and receiving RFID tag signals at each loading and unloading location within the site, the vehicle's operating status, including arrival at the loading and unloading location, switching between loading and unloading locations, and leaving the loading and unloading location, is monitored based on the strength, frequency, and vehicle speed of the signals received by the antennas provided at each loading and unloading location within the site from the time the vehicle enters the site to the time it leaves the site. The technical solution of the present invention can accurately locate the location and time of a vehicle's stop at a loading and unloading location, facilitate segmented travel analysis, and monitor the vehicle's stop status at each loading and unloading location in real time, thereby optimizing the queuing and parking arrangements of vehicles within the site, effectively improving the operational efficiency of vehicles within the site, and reducing unnecessary waste of manpower and transportation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0033] Figure 1 This is a flow chart of a method for automatically monitoring the running status of vehicles in a site according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of vehicles arriving at the loading and unloading position;

[0035] Figure 3 This is a schematic diagram of vehicles passing through the loading and unloading position;

[0036] Figure 4 This is a schematic diagram of a vehicle leaving the loading and unloading position;

[0037] Figure 5 Schematic diagram of an automatic monitoring system for vehicle operation status within a site according to an embodiment. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] Figure 1 The flowchart of an embodiment of a method for automatically monitoring the running status of vehicles in a site disclosed in the present invention is shown, comprising:

[0040] S110: Each vehicle entering the site is affixed with a unique RFID tag, and a unique antenna for transmitting and receiving RFID tag signals is installed at the loading and unloading area within the site;

[0041] Each vehicle entering the site is pre-attached with an RFID tag, which uniquely corresponds to the vehicle, thus binding the two and ensuring uniqueness. Furthermore, antennas for transmitting and receiving RFID tag signals are pre-installed at each loading and unloading station. To ensure good signal reception, the antennas are positioned in the middle of each loading and unloading station, at a certain height above the ground. Similarly, each loading and unloading station is uniquely associated with the antenna, which is also pre-stored.

[0042] S120: From the time the vehicle enters the site to the time it leaves the site, the vehicle's operating status is determined based on the strength and frequency of signals received by the antennas provided at each loading and unloading location in the site, as well as the vehicle's speed.

[0043] From the moment a vehicle enters the site, the vehicle's operating status is judged by combining the strength and frequency of the RFID tag signal corresponding to the vehicle received by the antennas at each loading and unloading position, as well as the vehicle's speed. This is done until the vehicle leaves the site, thereby achieving automatic monitoring of the vehicle's operating status within the site. The vehicle's operating status includes arriving at a loading and unloading position, switching between loading and unloading positions, and leaving a loading and unloading position.

[0044] This solution can accurately locate the location and time of vehicle stops at loading and unloading locations, facilitate segmented journey analysis, and monitor the parking conditions of vehicles at various loading and unloading locations on the site in real time, thereby optimizing the queuing and parking arrangements of vehicles on the site, effectively improving the operational efficiency of vehicles on the site, and reducing unnecessary waste of manpower and transportation capacity.

[0045] As an embodiment of the present invention, the vehicle's arrival at the loading and unloading position operation status determination includes polling all antennas to monitor whether an RFID tag signal is received continuously for a first preset time period; if so, determining that the vehicle has arrived at the loading and unloading position corresponding to the antenna that has received the RFID tag signal continuously for the first preset time period; if there are multiple antennas that have received the RFID tag signal continuously for the first preset time period, determining that the vehicle has arrived at the loading and unloading position corresponding to the antenna that has received the signal the most times.

[0046] Preferably, the first preset duration is 20 seconds. As one embodiment of the present invention, when a vehicle equipped with an RFID tag enters the site and approaches a loading and unloading position, the site antenna receives the RFID tag signal on the vehicle. When an antenna continuously receives the signal for 20 seconds, the vehicle is determined to have arrived at that loading and unloading position. If multiple antennas simultaneously and continuously receive the RFID tag signal from the vehicle, the total number of times each antenna continuously receives the signal within 20 seconds is compared, and the loading and unloading position corresponding to the antenna with the most received signals is determined to be the loading and unloading position that the vehicle ultimately arrived at.

[0047] In one embodiment of the present invention, when determining a vehicle's arrival at a loading / unloading location, antennas with a continuous signal for 20 seconds, including the first and last 5 seconds, are selected as the corresponding antennas. This embodiment uses the presence of a signal for the first and last 5 seconds to determine signal continuity, and receiving the same RFID tag signal from the same antenna for 20 consecutive seconds confirms that the vehicle was within the corresponding antenna's signal range from the beginning to the end of the 20-second period.

[0048] Figure 2 This is a schematic diagram of the vehicle arriving at the loading and unloading position, such as Figure 2As shown, when vehicle CL-0000001 (named after the label attached to the vehicle) is docked at the loading and unloading position corresponding to antenna TX-002, antennas TX-001, TX-002, and TX-003 all read the RFID tag signal on the vehicle. The number of times the signal is read is 100, 80, and 20, respectively. However, the signal read by antenna TX-001 is discontinuous, while antennas TX-002 and TX-003 both read continuous RFID tag signals. It is determined that vehicle CL-0000001 is docked at the loading and unloading position corresponding to antenna TX-002, which has a continuous RFID tag signal and the largest number of signal readings.

[0049] Preferably, within a second preset time period after determining that the vehicle has arrived at the loading and unloading position, the arrival stability monitoring of the RFID tag signal corresponding to the vehicle is performed, including: if the signal is received continuously and the most times by the antenna corresponding to the loading and unloading position where the vehicle has arrived, it is finally determined that the vehicle has arrived at the loading and unloading position; if the signal is received continuously but the antenna with the most times is not the antenna corresponding to the loading and unloading position where the vehicle has arrived, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna that receives the signal the most times, and the arrival stability monitoring is performed.

[0050] When there are many vehicles in the site and they need to queue up to enter the loading and unloading position, due to slow driving, the loading and unloading position initially judged to have arrived is only a passing one, and not the loading and unloading position the vehicle will eventually arrive at. Therefore, within the second preset time period after the vehicle is judged to have arrived at the loading and unloading position, the arrival stability of the RFID tag signal corresponding to the vehicle is monitored to determine the loading and unloading position the vehicle finally arrives at. Within the second preset time period, if the antenna corresponding to the loading and unloading position corresponding to the first judgment that the vehicle has arrived at receives the RFID tag signal corresponding to the vehicle continuously and the most times, then it is finally determined that the vehicle has arrived at the loading and unloading position; if the antenna that receives the RFID tag signal corresponding to the vehicle continuously and the most times is another antenna, then the previous loading and unloading position arrival judgment is canceled, and instead the vehicle is judged to have arrived at the loading and unloading position corresponding to the antenna that received the signal the most times, and the arrival stability monitoring is performed again in the same way. In this embodiment, the second preset time period is preferably 60 seconds.

[0051] Furthermore, in the arrival stability monitoring, if no antenna receives the RFID tag signal corresponding to the arriving vehicle or the received signal is discontinuous, the original judgment of the vehicle arriving at the loading and unloading position is canceled and the vehicle arrival at the loading and unloading position operation status judgment is performed again.

[0052] Figure 3 Schematic diagram of vehicles passing through the loading and unloading position, such as Figure 3As shown, if vehicle CL-0000002 wants to park at the loading and unloading position corresponding to antenna TX-003, it needs to pass through the loading and unloading positions corresponding to antennas TX-001 and TX-002. When there are many vehicles in the site, vehicle CL-0000002 needs to queue up and drive slowly to reach the target loading and unloading position. The vehicle operation status determined by the above method of automatic monitoring of vehicle operation status is as follows: the vehicle is first determined to have arrived at the loading and unloading position corresponding to antenna TX-001, and after arrival stability monitoring, the arrival is cancelled. Then the vehicle is determined to have arrived at the loading and unloading position corresponding to antenna TX-002, and after arrival stability monitoring, the arrival is cancelled again. Finally, the vehicle arrives at the loading and unloading position corresponding to antenna TX-003. After arrival stability monitoring, it is confirmed that the vehicle has finally arrived at the loading and unloading position corresponding to antenna TX-003.

[0053] As an embodiment of the present invention, the vehicle loading and unloading position switching operation status judgment includes, after judging that the vehicle has arrived at the loading and unloading position, monitoring the RFID tag signal corresponding to the arriving vehicle with a second preset time length as the polling period; during the polling period, when the signal reception continues but the antenna with the most times is not the antenna corresponding to the loading and unloading position arrived by the vehicle, obtaining the vehicle speed; if the vehicle speed is greater than 0, judging that the vehicle loading and unloading position is switched to the loading and unloading position corresponding to the antenna with the most times of signal reception; if the vehicle speed is 0, no loading and unloading position switching judgment is made.

[0054] After the vehicle confirms that it has arrived at the loading and unloading position, the site antenna will continue to read the vehicle's RFID tag signal and verify the signal stability. Specifically, the signal continuity and multi-antenna number comparison are continuously performed with the second preset time length as a period. When the RFID tag signal corresponding to the vehicle arriving at the loading and unloading position is continuously received, but the number of times the antenna corresponding to the currently parked loading and unloading position receives this signal is no longer the largest, it indicates that the vehicle may be preparing to switch to the loading and unloading position. Then, the real-time speed of the vehicle is obtained to determine whether the vehicle is switching to the loading and unloading position. If the vehicle speed is greater than 0, it is determined that the vehicle has switched to the new loading and unloading position; if the vehicle speed is equal to 0, the determination of the vehicle switching to the loading and unloading position is cancelled, and the vehicle's operating status is maintained as the judgment of arriving at the loading and unloading position. By combining the vehicle's speed status for auxiliary verification, the problem of incorrect vehicle switching judgment caused by temporary instability of the antenna signal can be solved.

[0055] The following example illustrates the determination of loading and unloading positions. For example, vehicle CL-0000003 is parked at the loading and unloading position corresponding to antenna TX-002. When a metal rolling door is lowered, partially blocking the antenna, the total signal from the adjacent antenna TX-003 will exceed the total signal received by antenna TX-002. At this point, it is pre-determined that vehicle CL-0000003 is about to switch loading and unloading positions. If the vehicle speed is detected to be zero, the determination of switching loading and unloading positions is blocked, and the vehicle is still determined to remain parked at the loading and unloading position corresponding to the original antenna TX-002.

[0056] Preferably, when the number of signals received by another antenna exceeds 10% of the number of signals received by the original vehicle loading / unloading position antenna, the vehicle is determined to have switched to the loading / unloading position corresponding to that antenna. As one embodiment of the present invention, a 10% threshold is used to determine whether a vehicle is switching loading / unloading positions. Testing has determined that using a 10% threshold, raising the threshold for switching determination, effectively avoids the problem of minimal signal differences between different antennas leading to the vehicle's operating status being interpreted as a loading / unloading position switch, while also preventing the switch determination from being too slow or delayed.

[0057] As an embodiment of the present invention, the determination of the running state of a vehicle leaving a loading and unloading position includes:

[0058] After determining that the vehicle has arrived at the loading and unloading position, the RFID tag signal corresponding to the arriving vehicle is monitored with a second preset time period as the polling period; during the polling period, when no antenna receives the RFID tag signal corresponding to the arriving vehicle, the vehicle speed is obtained. If the vehicle speed is greater than 0, it is determined that the vehicle has left; if the vehicle speed is 0, the vehicle speed and its corresponding RFID tag signal are continuously monitored within a third preset time period. During this period, if the vehicle speed is greater than 0 or there is no signal, it is determined that the vehicle has left; otherwise, the operating state is maintained as the judgment of arriving at the loading and unloading position.

[0059] Specifically, after a vehicle is confirmed to be parked at a loading and unloading location, the site antenna will continuously read the vehicle's corresponding RFID tag signal in a 60-second cycle. If no antenna reads the vehicle's RFID tag signal within 60 seconds, it is pre-judged that the vehicle has left the loading and unloading location. The vehicle's speed is then obtained. If the vehicle speed is greater than 0, the vehicle is confirmed to have left the loading and unloading location. If the vehicle speed is 0, the pre-judgment that the vehicle has left the loading and unloading location is revoked, and the vehicle speed and the vehicle's corresponding RFID tag signal are continuously monitored for a third preset duration. If during this period, the vehicle speed is greater than 0 or the antenna does not read the RFID tag signal within the entire site, the vehicle is confirmed to have left the loading and unloading location. However, if the RFID tag signal is read, the pre-judgment that the vehicle has left the loading and unloading location is revoked, and the vehicle's operating status is maintained as the judgment that the vehicle has arrived at the loading and unloading location. Preferably, in this embodiment, the third preset duration is 300 seconds.

[0060] Figure 4 This is a schematic diagram of the vehicle leaving the loading and unloading position, as shown in Figure 4 As shown, vehicle CL-0000004 is parked at the loading and unloading position corresponding to antenna TX-001. At time T1, the signal of vehicle CL-0000001 is interrupted. At T1+60S, no antenna receives the signal, which satisfies the 60-second pre-judgment condition for vehicle departure. By obtaining the vehicle speed, it is found to be 20km / h. Therefore, vehicle CL-0000004 successfully leaves the loading and unloading position corresponding to antenna TX-001 at time T1. If the vehicle speed is 0, it cannot be determined whether the vehicle has left the loading and unloading position. Then, from T1+60S to T1+60S, the vehicle leaves the loading and unloading position. During the period of S+300S, the vehicle speed status and the RFID tag signal corresponding to the vehicle are continuously obtained. During this period: if the antenna TX-001 re-acquires the RFID tag signal of the vehicle CL-0000001, the pre-judgment that the vehicle has left the loading and unloading position is cancelled, and the vehicle is finally judged to be still in the state of arriving at the loading and unloading position; if the vehicle speed obtained is greater than 0, it is confirmed that the vehicle has left the loading and unloading position; if the vehicle speed is still 0, but the RFID tag signal of the vehicle CL-0000001 has not been obtained, it is confirmed that the vehicle has left the loading and unloading position.

[0061] Furthermore, a determination is made regarding whether the vehicle has left the loading and unloading position. If no antenna receives the RFID tag signal corresponding to the arriving vehicle, and before obtaining the vehicle speed, including within a fourth preset time period, if the RFID tag signal corresponding to the vehicle is received again, the determination that the vehicle has arrived at the loading and unloading position is maintained. The fourth preset time period is shorter than the second preset time period. In this embodiment, the fourth preset time period is 40 seconds. Since the failure to receive the RFID tag signal corresponding to the vehicle may be due to an occasional malfunction, if the signal is received again within the fourth preset time period, the pre-determination that the vehicle has left the loading and unloading position is revoked, and the determination that the vehicle has arrived at the loading and unloading position is maintained. If the RFID tag signal corresponding to the vehicle is still not received within the fourth preset time period, the vehicle's departure from the loading and unloading position is further determined in combination with the vehicle speed.

[0062] The automatic monitoring method for the operation status of vehicles in a site disclosed in the present invention can accurately locate the position and time of vehicle parking and loading and unloading positions, facilitate segmented analysis of the journey, and monitor the parking status of vehicles at each loading and unloading position in the site in real time, thereby optimizing the queuing and parking arrangements of vehicles in the site, effectively improving the operating efficiency of vehicles in the site, and reducing unnecessary waste of manpower and transportation capacity.

[0063] Figure 5 This is a schematic diagram of an automatic monitoring system for vehicle operation status within a site according to an embodiment of the present application. Figure 5As shown, the automatic monitoring system 1 for vehicle operation status in the site includes an RFID tag 21 attached to the vehicle, an antenna 31 , a vehicle-mounted terminal 32 , an RFID handheld terminal 33 , a reader / writer 41 and a processing terminal 50 .

[0064] RFID tag 21, set on the vehicle entering the venue and uniquely corresponds to it;

[0065] Antenna 31, provided at the loading and unloading position of the site, for transmitting and receiving signals from the RFID tag 21;

[0066] The reader / writer 41 is used to collect the signals of the RFID tag 21 received by the antenna 31 and send them to the processing terminal 50;

[0067] The vehicle terminal 32 is used to obtain the vehicle speed and send it to the processing terminal 50;

[0068] The processing terminal 50 is used to determine the vehicle operation status based on the strength, number and vehicle speed of the signal received by the antenna 31; the vehicle operation status includes arrival at the loading and unloading position, loading and unloading position switching and leaving the loading and unloading position.

[0069] Preferably, the processing terminal 50 further includes an RFID tag signal module 51 for controlling the power, naming, turning on and off of the antenna 31 and sending the received signal of the RFID tag 21 to the processing module 52;

[0070] Preferably, the processing terminal 50 further includes a processing module 52 for determining the vehicle operating state according to the strength and number of signals received by the antenna 31 and the vehicle speed.

[0071] Preferably, the automatic monitoring system 1 for vehicle operation status within the site further includes an RFID handheld terminal 33 for entering, replacing, and unbinding the binding between the RFID tag 21 and the vehicle, and sending the binding information to the processing terminal 50 .

[0072] The automatic monitoring system for the operation status of vehicles in the site disclosed by the present invention can accurately locate the position and time of vehicle parking and loading and unloading positions, facilitate segmented analysis of the journey, and display the parking status of vehicles at various loading and unloading positions in the site in real time, thereby optimizing the queuing and parking arrangements of vehicles in the site, improving the operating efficiency of vehicles in the site, and reducing unnecessary waste of manpower.

[0073] For other details about the technical solutions for implementing each module in the system for automatically monitoring the running status of vehicles on site in the above embodiment, please refer to the description of the method for automatically monitoring the running status of vehicles on site in the above embodiment, which will not be repeated here.

[0074] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similarities between the various embodiments can be referred to in conjunction with each other. For system-related embodiments, since they are generally similar to method-related embodiments, their description is relatively simple. For relevant details, refer to the description of the method-related embodiments.

[0075] The above detailed description of the specific embodiments of the invention is intended to be illustrative only, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the invention are also within the scope of the present invention. Therefore, equivalent changes, modifications, and improvements made without departing from the spirit and scope of the present invention are also encompassed within the scope of the present invention.

Claims

1. A method for automatically monitoring the running status of vehicles in a site, characterized in that: include: Each vehicle entering the site is affixed with a unique RFID tag, and each loading and unloading area within the site is equipped with a unique antenna for transmitting and receiving RFID tag signals; From the time a vehicle enters the site to the time it leaves the site, the vehicle's operating status is determined based on the strength, frequency, and speed of the signals received by the antennas installed at each loading and unloading location within the site; The vehicle operation status includes arrival at the loading and unloading position, switching between loading and unloading positions, and leaving the loading and unloading position; Vehicle loading and unloading position switching operation status judgment, including: After determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the arriving vehicle is monitored with a second preset time length as the polling cycle; During the polling cycle, if signal reception continues but the antenna with the most reception times is not the one corresponding to the loading and unloading position the vehicle has arrived at, obtain the vehicle speed. If the vehicle speed is greater than 0, the vehicle loading and unloading position is determined to be switched to the loading and unloading position corresponding to the antenna with the most reception times. If the vehicle speed is 0, no switching of loading and unloading positions is determined. Determine the running status of the vehicle after leaving the loading and unloading position, including: After determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the arriving vehicle is monitored with a second preset time length as the polling cycle; During the polling cycle, when no antenna receives the RFID tag signal corresponding to the arriving vehicle, the vehicle speed is obtained. If the vehicle speed is greater than 0, it is determined that the vehicle has left. If the vehicle speed is 0, the vehicle speed and its corresponding RFID tag signal are continuously monitored within a third preset time period. If the vehicle speed is greater than 0 or there is no signal during this period, it is determined that the vehicle has left. Otherwise, the operating state is maintained as arriving at the loading and unloading position.

2. The method for automatically monitoring the running status of vehicles in a site according to claim 1, characterized in that: The vehicle's operating status upon arrival at the loading and unloading location is determined, including: Polling all the antennas to monitor whether an RFID tag signal is received for a first preset time period; If so, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna that has received the RFID tag signal for the first preset time period; if there are multiple antennas that have received the RFID tag signal for the first preset time period, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna that receives the signal the most times.

3. The method for automatically monitoring the running status of vehicles in a site according to claim 2, characterized in that: Within a second preset time period after determining that the vehicle has arrived at the loading and unloading location, the RFID tag signal corresponding to the vehicle is monitored for arrival stability, including: If the signal is received continuously and the number of times by the antenna corresponding to the loading and unloading position where the vehicle arrives is the largest, it is finally determined that the vehicle has arrived at the loading and unloading position; If the signal reception continues but the antenna with the most reception times is not the antenna corresponding to the loading and unloading position arrived by the vehicle, it is determined that the vehicle has arrived at the loading and unloading position corresponding to the antenna with the most reception times, and the arrival stability monitoring is performed.

4. The method for automatically monitoring the running status of vehicles in a site according to claim 3, characterized in that: During the arrival stability monitoring, if no antenna receives the RFID tag signal corresponding to the arriving vehicle or the received signal is discontinuous, the original vehicle arrival at the loading and unloading position judgment is canceled and the vehicle arrival at the loading and unloading position operation status judgment is performed again.

5. The method for automatically monitoring the running status of vehicles in a site according to claim 1, characterized in that: To determine if a vehicle has left the loading and unloading location, when no antenna receives the RFID tag signal corresponding to the arriving vehicle, before obtaining the vehicle speed, including: If the RFID tag signal corresponding to the vehicle is received again within the fourth preset time period, the vehicle operation state is maintained as arriving at the loading and unloading position.

6. A system for automatically monitoring the running status of vehicles in a site, the system being used to implement the method for automatically monitoring the running status of vehicles in a site as claimed in any one of claims 1 to 5, characterized in that: include: RFID tags are set on the vehicles entering the venue and are uniquely matched; Antenna, installed at the loading and unloading position of the site, used to transmit and receive RFID tag signals; A reader / writer, configured to collect RFID tag signals received by the antenna and send them to a processing terminal; The vehicle terminal is used to obtain the vehicle speed and send it to the processing terminal; The processing terminal is used to determine the vehicle operation status based on the strength, number and vehicle speed of the signal received by the antenna; the vehicle operation status includes arriving at the loading and unloading position, switching between loading and unloading positions, and leaving the loading and unloading position.

7. The automatic monitoring system for vehicle operation status in a site according to claim 6, characterized in that: The processing terminal includes: RFID tag signal module, used to control the power, naming, opening and closing of the antenna, and send the received RFID tag signal to the processing module; The processing module is used to determine the vehicle's operating status based on the strength and number of signals received by the antenna and the vehicle's speed.

8. The automatic monitoring system for vehicle operation status in a site according to claim 6 or 7, characterized in that: Also includes The RFID handheld terminal is used to enter, replace and unbind the binding between the RFID tag and the vehicle, and send the binding information to the processing terminal.

Images