CN112078818A - Airplane wheel gear positioning system and method - Google Patents
Airplane wheel gear positioning system and method Download PDFInfo
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- CN112078818A CN112078818A CN201910506139.6A CN201910506139A CN112078818A CN 112078818 A CN112078818 A CN 112078818A CN 201910506139 A CN201910506139 A CN 201910506139A CN 112078818 A CN112078818 A CN 112078818A
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Abstract
The invention discloses an airplane wheel gear positioning system and method, wherein the system comprises: the base station, the tag and the data processing module are arranged in each airplane wheel gear; the base station is used for distributing an ID number to the label of the airplane wheel gear where the base station is located, locating the airplane wheel gear, matching the base station with the label of the other appointed airplane wheel gear, measuring the distance between the two airplane wheel gears, and sending the locating information and the distance value to the data processing module; all base stations and labels are in one-to-one correspondence; the tag is used for communicating and ranging with a base station of the airplane wheel gear assigned with the same ID number; and the data processing module is used for distributing an ID number for each base station, receiving the positioning information and the distance value sent by each base station, generating corresponding information and sending the corresponding information. The system and the method can position the airplane wheel guard in the airport, thereby having the function of alarming and reminding the missed wheel guard placement and the less wheel guard placement so as to reduce the occurrence of accidents.
Description
Technical Field
The invention relates to the field of airplane wheel fender detection in airports, in particular to an airplane wheel fender positioning system and method.
Background
In the process of towing an airplane by airplane maintenance personnel of a certain domestic airline company, one maintenance personnel is rolled by the airplane and is treated as invalid because of the problem of the mode of the wheel block. The main reasons for this event are that the aircraft does not build an effective hydraulic brake during towing and that the trailer is mopped up when the wheel block is not in place, causing the aircraft to slip. Another major reason is the lack of safety awareness by maintenance personnel to properly and timely stop the wheel chock. This behavior of the wheel block must be viewed in mind with varying degrees of consequence. The phenomena of leakage, late blocking, non-blocking and the like of the wheel block generate potential safety hazards. At present, no corresponding research is available in the field of wheel gear positioning at home and abroad.
Disclosure of Invention
The invention aims to overcome the technical defects and provides an airplane wheel fender positioning system and an airplane wheel fender positioning method.
In order to achieve the above object, the present invention provides an aircraft wheel fender positioning system, which comprises: the base station, the tag and the data processing module are arranged in each airplane wheel gear;
the base station is used for distributing an ID number to the label of the airplane wheel gear where the base station is located, locating the airplane wheel gear, matching the base station with the label of the other appointed airplane wheel gear, measuring the distance between the two airplane wheel gears, and sending the locating information and the distance value to the data processing module; all base stations and labels are in one-to-one correspondence;
the tag is used for communicating and ranging with a base station of the airplane wheel gear assigned with the same ID number;
and the data processing module is used for distributing an ID number for each base station, receiving the positioning information and the distance value sent by each base station, generating corresponding information and sending the corresponding information.
As an improvement of the above system, the base station comprises: the device comprises a first low-power-consumption processor, a positioning module, a first UWB chip and a communication module;
the first low-power processor is used for receiving the ID number sent by the data processing module and distributing the ID number to the label of the airplane wheel gear where the first low-power processor is located; the system is also used for receiving the time stamps of the communication between the base station and the matched tag and calculating the distance value between the base station and the matched tag; the positioning module is also used for receiving positioning information sent by the positioning module;
the positioning module is used for positioning the wheel gear when the airplane wheel gear is not placed under the airplane wheel and sending positioning information to the first low-power-consumption processor;
the first UWB chip is used for communicating with a tag of another appointed airplane wheel gear;
and the communication module is used for sending the positioning information and the distance value of the first low-power processor to the data processing module.
As an improvement to the above system, the tag comprises: a second low power processor and a second UWB chip;
the second low-power processor is used for calculating a timestamp of the communication of the tag and reporting the running state of the tag;
the second UWB chip is used for communicating with the paired base stations.
As an improvement of the above system, the data processing module comprises: a data receiving unit, a base station ID allocating unit and an information generating and transmitting unit;
the data receiving unit is used for receiving the positioning information and the distance value sent by each base station;
the base station ID distribution unit is used for distributing an ID number to each base station;
the information generating and sending unit is used for judging whether the wheel gear moves according to the positioning information when the airplane stops at the airport, and generating and sending information for reminding a worker to place the wheel gear if the wheel gear does not move; the distance value is compared with a theoretical distance value, if the absolute value of the difference between the distance value and the theoretical distance value is greater than a threshold value, alarm information is generated, and an instruction for checking whether the wheel gear is correctly placed is issued to the captain of the airplane; otherwise, the relative position of the group of wheel files accords with the wheel file placement requirement, and information of wheel file placement completion is sent.
As an improvement of the above system, the assigning of the ID number to the tag of the airplane wheel fender where the tag is located specifically includes: after each base station receives the ID number sent by the data processing module, the ID number is distributed to the label of the same airplane wheel gear through a serial port, and the ID number is the ID +1 of the base station; the ID number of the base station of the ith airplane wheel gear is the same as the ID number of the label of the (i + 1) th airplane wheel gear, and i is more than or equal to 1 and less than or equal to N-1; and (3) enabling the ID number of the base station of the Nth airplane wheel gear to be the same as the ID number of the label of the 1 st airplane wheel gear, wherein N is the total number of the airplane wheel gears.
Based on the system, the invention also provides an aircraft wheel gear positioning method, which comprises the following steps:
the positioning module of the base station of each airplane wheel gear sends the positioning information of the airplane wheel gear to the first low-power processor, and the first low-power processor sends the positioning information to the data processing module through the communication module;
the method comprises the steps that when a certain airplane lands and the speed is about to be lower than a certain limit speed, if the received position information of all wheel gears is not changed within a certain time, the data processing module sends reminding information for placing the wheel gears to workers;
when the positioning module does not send positioning information, the data processing module allocates an ID number to the base station of each airplane wheel gear; each base station distributes an ID number to the label of the airplane wheel gear of the base station;
each base station is paired with a label of another appointed airplane wheel gear according to the ID number of the base station, and then the distance value of the two airplane wheel gears is calculated; sending the distance value to a data processing module, comparing the obtained distance value with a theoretical distance value by the data processing module, if the absolute value of the difference between the distance value and the theoretical distance value is greater than a threshold value, sending alarm information, and sending an instruction for checking whether the wheel gear is correctly placed to the captain of the airplane; otherwise, the relative position of the group of wheel files accords with the wheel file placement requirement, and information of wheel file placement completion is sent.
As an improvement of the above method, the data processing module assigns an ID number to the base station of each aircraft gear; each base station distributes an ID number to the label of the airplane wheel gear of the base station; the method specifically comprises the following steps: the data processing module sequentially distributes the ID numbers to the base stations of the N airplane wheel files, and after each base station obtains the ID numbers, the ID numbers are distributed to the labels of the same airplane wheel file through the serial ports, wherein the ID numbers are ID +1 of the base stations; the ID number of the label of the (i + 1) th airplane wheel gear is the same as the ID number of the base station of the ith airplane wheel gear, and i is more than or equal to 1 and less than or equal to N-1; the ID number of the tag of the 1 st airplane wheel fender is the same as the ID number of the base station of the nth airplane wheel fender.
As an improvement of the method, each base station selects tag pairs with the same ID number in other airplane wheel files according to the ID information, and then performs ranging; the method specifically comprises the following steps:
the method comprises the steps that a tag sends a ranging request pulse signal to a base station at a first moment, and the base station receives the ranging request pulse signal at a second moment; recording the time T of the signal transmitted by the tag arriving at the base stationof；
The base station sends a response signal to the tag at a third moment, and the time from the receiving of the signal of the tag to the giving of the corresponding signal of the tag is recorded as Db(ii) a The tag receives the response signal at a fourth time; recording the time that the label firstly sends a signal to the base station and returns a response signal to the label to the base station as Ra；
The tag sends a communication end signal to the base station at the fifth moment, and the time from the time when the tag receives the response signal of the base station to the time when the tag sends a signal to the base station for the second time is recorded as Da(ii) a The base station B receives the end signal at a sixth moment; recording the time when the base station receives the signal transmitted by the label for the second time as Rb；
And calculating the distance between the base station and the tag according to the time:
calculating one-way time of flight Tof：
The distance d between the tag and the base station is then:
where C is the signal transmission speed.
As an improvement of the above method, the method further comprises: when the distance value of the two airplane wheel gears has great deviation with a set theoretical value or the data processing module starts to receive positioning information again; the data processing module sends an instruction that the position of the wheel file changes, and an operator judges whether the withdrawal of the wheel file belongs to normal withdrawal or not.
The invention has the advantages that:
the system and the method can position the airplane wheel guard in the airport, thereby having the function of alarming and reminding the missed wheel guard placement and the less wheel guard placement so as to reduce the occurrence of accidents.
Drawings
FIG. 1 is a block diagram of an aircraft wheel fender positioning system of the present invention;
FIG. 2 is a flowchart of airport background location of the present invention;
FIG. 3 is a flow chart of base station ranging ID of the present invention;
FIG. 4 is a flowchart of airport background ID assignment of the present invention;
FIG. 5 is a block diagram of a ranging phase of the present invention;
FIG. 6 is a block diagram of two-sided ranging of the present invention;
FIG. 7 is a flow chart of tag ranging according to the present invention;
FIG. 8 is a flow chart of base station ranging according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1
The embodiment 1 of the invention provides an airplane wheel fender positioning system which can be used for positioning the position of a person or an object and uploading corresponding information to an airport background, for example, the system is applied to the field of valuable asset position change reminding, but the main application field of the invention is the positioning of airplane wheel fenders in an airport, and the system comprises a plurality of pairs of base stations, tags and the airport background. When the airplane wheel gear is not placed under the airplane wheel, the wheel gear is accurately positioned through the GPS, and therefore whether the position of the wheel gear changes when the airplane stops is judged. When the wheel shelves are placed under the aircraft wheel, because the GPS positioning accuracy is damaged or the positioning cannot be carried out, the wheel shelf position information cannot be given to the terminal, therefore, the DW1000 chip based on the UWB technology is switched to measure the distance, the states of the baffles are judged according to the distance threshold values among the baffles, the state information is uploaded to the airport background through 4G signals, the airport background gives the captain different working information according to different states, and the accident caused by the fact that the baffles are missed to be placed or are not placed is reduced.
The system of the invention comprises a plurality of pairs of base stations, tags and airport backgrounds. A pair of base stations and tags are placed in each of the flights of the aircraft. The distance information in the base station is sent to an airport background (a computer) through a 4G signal, and the airport background issues different operation commands to the captain according to different received information.
The airport background is a computer which can be connected with the internet and is placed in the machine room. The airport background can receive distance information sent by the base station through the 4G signal, the obtained real-time distance and a set threshold value are judged, if the real-time distance is smaller than or larger than a certain range of the set threshold value, a certain wheel gear is probably not placed under an airplane wheel, the background can send alarm information at the moment, and an instruction for checking whether the wheel gear is correctly placed or not is given to an airplane captain.
The base station is placed in the wheel chock; the base station consists of a low-power processor, a GPS chip, a DW1000 chip based on UWB technology and a 4G module.
The low-power processor is used for receiving the communication time stamps of the base station and the tags, calculating the distance values of the base station and the tags, and then sending the distance value information to the airport background through 4G signals. The low power consumption processor preferably uses a minimal single chip system, such as the STM32F1 series. The series has rich and reasonable peripherals, reasonable power consumption and reasonable price. Strong software support and rich software package.
The GPS chip is used for accurately positioning the wheel gear when the airplane wheel gear is not placed under an airplane wheel, and when an airplane stops in an airport, if the position movement does not occur to the wheel gear, the low-power-consumption processor sends alarm information to a background so as to remind a worker not to forget to place the wheel gear.
DW1000 enables base station and tag communications. The positioning precision is as high as 10 cm. The data transmission rate is as high as 6.8Mb/s, and the communication distance is 300 meters. Short packet mode communication is used, and the density of the tags is up to 11000 tags within a radius of 20 meters. The multi-path fading wireless communication system has stronger anti-jamming capability and can carry out reliable communication under high fading environment. Low power consumption, battery power supply and long-term use.
And the 4G module is used for sending the distance information in the low-power processor to the airport background. The 4G module is an important carrier of a connector and an object and is one of core components of the terminal equipment accessing the Internet of things. The 4G module is a general name of a product which is loaded to a specified frequency band by hardware, supports a standard LTE protocol by software and is highly integrated and modularized by the hardware and the software. The method has the characteristics of high communication speed, wide network spectrum, flexible communication and the like.
The label is placed in the wheel chock. The tag is composed of a low-power processor and a DW1000 chip based on UWB technology. The low power processor model and function are the same as those of the base station.
DW1000 employs a two-sided ranging method. Recording the time that the label firstly sends a signal to the base station and returns a response signal to the label to the base station as Ra(ii) a Recording the time from the receiving of the signal of the label to the giving of the corresponding signal of the label at the base station as Db(ii) a Recording the time T of the signal transmitted by the tag arriving at the base stationof(ii) a Recording the time from the time when the tag receives the base station response signal to the time when the tag sends a signal to the base station for the second time as Da(ii) a Recording the time when the base station receives the signal transmitted by the label for the second time as Rb。
According to the communication process, the time relation can be obtained:
and performing product operation on the two formulas to obtain:
Ra*Rb＝Da*Db+2Tof(Da+Db)+(4Tof)2 (2)
solve for one-way flight time Tof：
The distance d between the tag and the base station is then:
fig. 1 is the overall design of the system. When the wheel gear is not placed under an airplane wheel, the wheel gear is firstly positioned through a GPS or a Beidou, and 4G signals transmitted by a 4G module are transmitted to an airport background, the airport background determines when to start a base station and a label and distributes ID (identity) to the base station and the label according to the received information, the distance measurement is started after the base station and the label are started, the measured distance information is transmitted to the airport background through the 4G signals, and the airport background can perform corresponding judgment according to the received distance value and transmits a corresponding operation instruction to a captain. According to the system design, the number of the returned distance values is three, and if the actual returned value is less than three, a command for confirming whether the wheel gear is properly arranged is issued to the captain again; if three distance values are returned but the difference between the three distance values and the set threshold value is larger, a command for confirming whether the wheel gear is properly arranged is sent to the captain, and therefore the danger of missing and missing the wheel gear is reduced.
Example 2
Based on the above system, embodiment 2 of the present invention provides an aircraft wheel gear positioning method, where the method includes:
step 1) a positioning module of a base station of each airplane wheel fender sends positioning information of the airplane wheel fender to a low-power-consumption processor, and the low-power-consumption processor sends the positioning information of the positioning module to a data processing module through a communication module;
step 2) the data processing module acquires that a certain airplane lands and the speed is less than a certain limit speed, but the received position information of all wheel files is unchanged within a certain time, and then sends reminding information to an operator to remind the operator to place the wheel files;
step 3), after the positioning module does not send positioning information, the data processing module allocates an ID number to the base station of each airplane wheel gear; each base station distributes an ID number to the label of the airplane wheel gear of the base station;
step 4) each base station selects tags with the same ID number in other airplane wheel files to pair according to the ID number of each base station, and then the distance value of the two airplane wheel files is calculated; sending the distance value to a data processing module, comparing the obtained distance value with a theoretical distance value by the data processing module, if the absolute value of the difference between the distance value and the theoretical distance value is greater than a threshold value, sending alarm information, and sending an instruction for checking whether the wheel gear is correctly placed to the captain of the airplane; otherwise, the relative position of the group of wheel files accords with the wheel file placement requirement, and information of wheel file placement completion is sent.
Step 5) after the airplane wheel bumper is withdrawn, the distance value of the two airplane wheel bumpers has great deviation with a set theoretical value or the data processing module starts to receive positioning information again; the data processing module sends an instruction that the position of the wheel file changes, and an operator performs subsequent operations according to whether the wheel file withdrawal belongs to normal withdrawal.
FIG. 2 is a flow chart of airport background positioning. When the background of the airport does not detect that the airplane is stopped, whether the airplane is stopped or not is detected every 20 s; when the airplane is detected to be stopped, the airport background detects whether the position of the wheel gear is changed or not by detecting a 4G signal sent by a GPS chip in the base station through a 4G module. If the change occurs at the Tmin, the change indicates that the working personnel operates the wheel gear; if the change does not occur at the Tmin, the airport background reminds the staff to operate the gear until the gear position is changed.
Fig. 3 is a ranging ID flow diagram. If the base station does not receive the information sent by the airport background, the detection is carried out all the time; if the base station receives the 4G information sent by the airport background, the ID distributed by the airport background is extracted, and the base station transmits the ID value to the label through the serial port after obtaining the ID.
FIG. 4 is a flow chart of airport background ID assignment. And when the GPS positioning is finished, the airport background sends information of the assigned ID to the moved wheel gear through a 4G signal. If the low-power processor in the base station does not receive the ID information within T1min, performing next round detection; and if the ID information is received within T1min, finishing the ID information distribution.
Figure 5 is a ranging phase block diagram. The airport background assigns an ID number to the base station in the wheel gear through the 4G signal, and then the low-power processor in the base station assigns an ID to the tag through the serial port. For example: if 100001, 200001, 30001 are assigned to the UWB signals of the base stations in the gear 1, 2, 3, the base stations assign 100002, 200002, 30002 to their tags, respectively. The low power processors are selectively paired according to the ID number of the DW1000 chip. The base station of wheel section 1 will pair with the tags of wheel sections 2, 3 and not with the tags of the same wheel section. Wherein the wheel blocks 1, 2, 3 are respectively placed on the same side of each landing gear wheel. After the pairing is completed, the tags of the wheel gear 2 and 3 and the base station of the wheel gear 1 perform distance measurement, and similarly, the base stations of the wheel gear 2 and 3 perform distance measurement with other two tags. The measured distance information can be sent to an airport background through a 4G module, the airport background can compare the distance information monitored in real time with a set threshold value, and different instructions are issued to the pilot according to different comparison results.
Another way of distribution: the data processing module sequentially distributes the ID numbers to the base stations of the N airplane wheel files, and after each base station obtains the ID numbers, the ID numbers are distributed to the labels of the same airplane wheel file through the serial ports, wherein the ID numbers are ID +1 of the base stations; the ID number of the label of the (i + 1) th airplane wheel gear is the same as the ID number of the base station of the ith airplane wheel gear, and i is more than or equal to 1 and less than or equal to N-1; the ID number of the tag of the 1 st airplane wheel fender is the same as the ID number of the base station of the nth airplane wheel fender.
Figure 6 is a block diagram of two-sided ranging. The distance measuring steps are as follows:
the node A sends a ranging request pulse signal to the node B at a first moment;
the node B receives the request pulse signal at a second moment;
the node B sends a response signal to the node A at a third time;
the node A receives the response signal at a fourth moment;
the node A sends a communication ending signal to the node B at the fifth moment;
the node B receives the end signal at a sixth time.
Fig. 7 is a tag ranging flow diagram. And starting initialization parameters, starting the broadcast signal playing by the tag, continuing to transmit the broadcast signal if the broadcast signal is not ended, and stopping transmitting the broadcast signal if the broadcast signal is ended.
Fig. 8 is a base station ranging flow diagram. And starting to initialize parameters, detecting whether the broadcast signals of the tags are received or not, if not, continuing to detect, and if so, entering a ranging stage. If the distance measurement is not finished, the distance measurement is continued, and if the distance measurement is finished, the distance information is sent to the airport background through the 4G module. If the transmission is not finished, the transmission is continued, and if the transmission is finished, the operation is finished.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. An aircraft wheel fender positioning system, the system comprising: the base station, the tag and the data processing module are arranged in each airplane wheel gear;
the base station is used for distributing an ID number to the label of the airplane wheel gear where the base station is located, locating the airplane wheel gear, matching the base station with the label of the other appointed airplane wheel gear, measuring the distance between the two airplane wheel gears, and sending the locating information and the distance value to the data processing module; all base stations and labels are in one-to-one correspondence;
the tag is used for communicating and ranging with a base station of the airplane wheel gear assigned with the same ID number;
and the data processing module is used for distributing an ID number for each base station, receiving the positioning information and the distance value sent by each base station, generating corresponding information and sending the corresponding information.
2. An aircraft wheel gear positioning system according to claim 1, wherein the base station comprises: the device comprises a first low-power-consumption processor, a positioning module, a first UWB chip and a communication module;
the first low-power processor is used for receiving the ID number sent by the data processing module and distributing the ID number to the label of the airplane wheel gear where the first low-power processor is located; the system is also used for receiving the time stamps of the communication between the base station and the matched tag and calculating the distance value between the base station and the matched tag; the positioning module is also used for receiving positioning information sent by the positioning module;
the positioning module is used for positioning the wheel gear when the airplane wheel gear is not placed under the airplane wheel and sending positioning information to the first low-power-consumption processor;
the first UWB chip is used for communicating with a tag of another appointed airplane wheel gear;
and the communication module is used for sending the positioning information and the distance value of the first low-power processor to the data processing module.
3. An aircraft wheel fender positioning system according to claim 2, wherein the tag comprises: a second low power processor and a second UWB chip;
the second low-power processor is used for calculating a timestamp of the communication of the tag and reporting the running state of the tag;
the second UWB chip is used for communicating with the paired base stations.
4. An aircraft wheel gear positioning system according to claim 2, wherein the data processing module comprises: a data receiving unit, a base station ID allocating unit and an information generating and transmitting unit;
the data receiving unit is used for receiving the positioning information and the distance value sent by each base station;
the base station ID distribution unit is used for distributing an ID number to each base station;
the information generating and sending unit is used for judging whether the wheel gear moves according to the positioning information when the airplane stops at the airport, and generating and sending information for reminding a worker to place the wheel gear if the wheel gear does not move; the distance value is compared with a theoretical distance value, if the absolute value of the difference between the distance value and the theoretical distance value is greater than a threshold value, alarm information is generated, and an instruction for checking whether the wheel gear is correctly placed is issued to the captain of the airplane; otherwise, the relative position of the group of wheel files accords with the wheel file placement requirement, and information of wheel file placement completion is sent.
5. An aircraft wheel fender positioning system according to claim 1 or 2, wherein the ID number is assigned to the tag of the aircraft wheel fender in which the tag is located, specifically: after each base station receives the ID number sent by the data processing module, the ID number is distributed to the label of the same airplane wheel gear through a serial port, and the ID number is the ID +1 of the base station; the ID number of the base station of the ith airplane wheel gear is the same as the ID number of the label of the (i + 1) th airplane wheel gear, and i is more than or equal to 1 and less than or equal to N-1; and (3) enabling the ID number of the base station of the Nth airplane wheel gear to be the same as the ID number of the label of the 1 st airplane wheel gear, wherein N is the total number of the airplane wheel gears.
6. An aircraft wheel fender positioning method, which is implemented based on the aircraft wheel fender positioning system of one of claims 1 to 5, and comprises the following steps:
the positioning module of the base station of each airplane wheel gear sends the positioning information of the airplane wheel gear to the first low-power processor, and the first low-power processor sends the positioning information to the data processing module through the communication module;
the method comprises the steps that when a certain airplane lands and the speed is about to be lower than a certain limit speed, if the received position information of all wheel gears is not changed within a certain time, the data processing module sends reminding information for placing the wheel gears to workers;
when the positioning module does not send positioning information, the data processing module allocates an ID number to the base station of each airplane wheel gear; each base station distributes an ID number to the label of the airplane wheel gear of the base station;
each base station is paired with a label of another appointed airplane wheel gear according to the ID number of the base station, and then the distance value of the two airplane wheel gears is calculated; sending the distance value to a data processing module, comparing the obtained distance value with a theoretical distance value by the data processing module, if the absolute value of the difference between the distance value and the theoretical distance value is greater than a threshold value, sending alarm information, and sending an instruction for checking whether the wheel gear is correctly placed to the captain of the airplane; otherwise, the relative position of the group of wheel files accords with the wheel file placement requirement, and information of wheel file placement completion is sent.
7. The aircraft wheel file positioning method according to claim 6, wherein the data processing module assigns an ID number to the base station of each aircraft wheel file; each base station distributes an ID number to the label of the airplane wheel gear of the base station; the method specifically comprises the following steps: the data processing module sequentially distributes the ID numbers to the base stations of the N airplane wheel files, and after each base station obtains the ID numbers, the ID numbers are distributed to the labels of the same airplane wheel file through the serial ports, wherein the ID numbers are ID +1 of the base stations; the ID number of the label of the (i + 1) th airplane wheel gear is the same as the ID number of the base station of the ith airplane wheel gear, and i is more than or equal to 1 and less than or equal to N-1; the ID number of the tag of the 1 st airplane wheel fender is the same as the ID number of the base station of the nth airplane wheel fender.
8. The aircraft wheel chock positioning method according to claim 6, wherein said calculating a distance value of two aircraft wheel chocks; the method specifically comprises the following steps:
the method comprises the steps that a tag sends a ranging request pulse signal to a base station at a first moment, and the base station receives the ranging request pulse signal at a second moment; recording the time T of the signal transmitted by the tag arriving at the base stationof；
The base station sends a response signal to the tag at a third moment, and the time from the receiving of the signal of the tag to the giving of the corresponding signal of the tag is recorded as Db(ii) a The tag receives the response signal at a fourth time; recording the time that the label firstly sends a signal to the base station and returns a response signal to the label to the base station as Ra；
The tag sends a communication end signal to the base station at the fifth moment, and the time from the time when the tag receives the response signal of the base station to the time when the tag sends a signal to the base station for the second time is recorded as Da(ii) a The base station B receives the end signal at a sixth moment; recording the time when the base station receives the signal transmitted by the label for the second time as Rb；
And calculating the distance between the base station and the tag according to the time:
calculating one-way time of flight Tof：
The distance d between the tag and the base station is then:
where C is the signal transmission speed.
9. The aircraft wheel file locating method of claim 6, further comprising: when the distance value of the two airplane wheel gears has great deviation with a set theoretical value or the data processing module starts to receive positioning information again; the data processing module sends an instruction that the position of the wheel file changes, and an operator judges whether the withdrawal of the wheel file belongs to normal withdrawal or not.
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| CN201910506139.6A Pending CN112078818A (en) | 2019-06-12 | 2019-06-12 | Airplane wheel gear positioning system and method |
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