CN114283667B - Maintenance teaching device of satellite navigation receiver - Google Patents
Maintenance teaching device of satellite navigation receiver Download PDFInfo
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- CN114283667B CN114283667B CN202111356960.8A CN202111356960A CN114283667B CN 114283667 B CN114283667 B CN 114283667B CN 202111356960 A CN202111356960 A CN 202111356960A CN 114283667 B CN114283667 B CN 114283667B
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Abstract
The application belongs to the field of teaching aids, and particularly relates to a maintenance teaching device of a satellite navigation receiver. The application provides a maintenance teaching device of a satellite navigation receiver for solving the technical problems. The device is characterized in that the modules are separated from each other, the separated modules are spliced on the overhaul bottom plate, and connection points are arranged on the surfaces of the separated modules, so that students can better know the specific structure of the receiver in teaching, meanwhile, the connection points are arranged on the separated modules, and the students can easily connect the measuring instrument to the connection points in teaching, so that detection of each module in the receiver is realized.
Description
Technical Field
The invention belongs to the field of teaching aids, and particularly relates to a maintenance teaching device of a satellite navigation receiver.
Background
At present, satellite navigation is widely applied to a plurality of fields such as transportation, marine fishery, hydrologic monitoring, weather forecast, forest fire prevention, communication systems, power dispatching, disaster relief and reduction and the like.
The teaching equipment aiming at the satellite navigation receiver does not keep pace with a satellite navigation system, and the composition structure of the navigation receiver cannot be intuitively displayed only by means of the existing navigation receiver in the satellite navigation teaching process. In addition, the existing navigation receiver has high integration level, so that the navigation receiver is inconvenient to use as a teaching aid, and the teaching quality can be greatly influenced.
Disclosure of Invention
The application provides a maintenance teaching device of a satellite navigation receiver for solving the technical problems. The device is characterized in that the modules are separated from each other, the separated modules are spliced on the overhaul bottom plate, and connection points are arranged on the surfaces of the separated modules, so that students can better know the specific structure of the receiver in teaching, meanwhile, the connection points are arranged on the separated modules, and the students can easily connect the measuring instrument to the connection points in teaching, so that detection of each module in the receiver is realized.
The invention provides a maintenance teaching device of a satellite navigation receiver, which comprises: the device comprises an overhaul bottom plate, an antenna module, a radio frequency module, a baseband module, a resolving module, a clock module, a power module and an interface module; the maintenance bottom plate is provided with a double-row type plug-in connector, and a connecting circuit is arranged in the maintenance bottom plate; the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module are separately spliced on the plug-in interface; the connecting circuit is used for connecting the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module; the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module are respectively provided with connection points, and the connection points are used for being connected with a detection instrument.
In some embodiments, the service teaching device of the satellite navigation receiver further comprises a reference receiver; the reference receiver is arranged on the overhaul bottom plate and is used for detecting the environmental satellite signals.
In some embodiments, the connection points include a voltage test connection point and a signal test connection point.
In some embodiments, the power module includes: the radio frequency power supply module is spliced on the overhaul bottom plate and is used for supplying power to the radio frequency module; and the baseband power supply module is spliced on the overhaul bottom plate and is used for supplying power to the baseband module.
In some embodiments, the antenna module, the radio frequency module, the baseband module, the resolution module, the clock module, the power module, and the interface module all have two models, the two models including: normal operation model and failure model.
In some embodiments, the working method of the radio frequency module includes the following steps: filtering the received antenna signals; amplifying the signal by low noise amplification; performing frequency conversion treatment on the amplified signal, and converting the signal into an analog intermediate frequency signal; and converting the analog intermediate frequency signal into a digital intermediate frequency signal and outputting the digital intermediate frequency signal to the baseband module.
In some embodiments, the data output by the resolving module is TTL serial data.
In some embodiments, the interface module converts the data output by the calculation module to 232 level or 422 level.
In some embodiments, the detection apparatus comprises: multimeter, spectrometer and oscilloscope. The universal meter is used for being connected with a voltage test connection point; the spectrometer and the oscilloscope are used for being connected with a signal testing connection point.
In some embodiments, the satellite navigation system receivable by a receiver formed by the overhaul base plate, the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module comprises: the Beidou satellite navigation system (BDS), the Galileo satellite navigation system (GALILEO), the Global satellite navigation System (GPS) and the GLONASS satellite navigation system (GLONASS). .
The application has the beneficial effects that: the application separates the modules of the receiver and inserts the modules into the overhaul bottom plate to form the receiver with complete functions. However, the teaching device of the application separates the modules of the receiver and can be disassembled at will, so that students can better know the specific structure of the receiver during teaching. Meanwhile, the connection point is arranged on the discrete module, so that students can easily connect the measuring instrument to the connection point during teaching, and the receiver is detected under the condition that the operation of the receiver is not affected, and the teaching purpose is better completed.
Drawings
The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. The drawings included herein are:
FIG. 1 is a schematic diagram of the teaching device;
FIG. 2 is a schematic diagram of a structure with a reference receiver added;
In the figure: the system comprises a 1-overhaul bottom plate, a 2-reference receiver, a 31-interface module, a 32-clock module, a 33-power module, a 34-radio frequency module, a 35-baseband module, a 36-resolving module and a 37-antenna module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the implementation method of the present invention will be given with reference to the accompanying drawings and examples, by which the technical means are applied to solve the technical problems, and the implementation process for achieving the technical effects can be fully understood and implemented accordingly.
The integrated level of the satellite navigation receiver is higher, so that the teaching purpose of maintenance and detection of the satellite navigation receiver is not facilitated. The application provides an overhaul teaching device of a satellite navigation receiver. The device is characterized in that the modules are separated from each other, the separated modules are spliced on the overhaul bottom plate 1, and connection points are arranged on the surfaces of the separated modules, so that students can better know the specific structure of the receiver in teaching, meanwhile, the connection points are arranged on the separated modules, and the students can easily connect measuring instruments to the connection points in teaching, so that detection of each module in the receiver is realized.
As shown in fig. 1, a maintenance teaching device for a satellite navigation receiver includes: the device comprises an overhaul bottom plate 1, an antenna module 37, a radio frequency module 34, a baseband module 35, a resolving module 36, a clock module 32, a power supply module 33 and an interface module 31. Wherein, be provided with double formula interface on the maintenance bottom plate 1, the inside of maintenance bottom plate 1 is provided with connecting circuit. The antenna module 37, the radio frequency module 34, the baseband module 35, the resolving module 36, the clock module 32, the power module 33 and the interface module 31 are separately plugged on the plug-in interface. The connection circuit is used for connecting the antenna module 37, the radio frequency module 34, the baseband module 35, the resolving module 36, the clock module 32, the power module 33 and the interface module 31. The antenna module 37, the radio frequency module 34, the baseband module 35, the resolving module 36, the clock module 32, the power module 33 and the interface module 31 are respectively provided with connection points, and the connection points are used for connecting with a detection instrument.
The application inserts the separated modules into the overhaul bottom plate 1 to form a receiver with complete functions. However, the teaching device of the application separates the modules of the receiver and can be disassembled at will, so that students can better know the specific structure of the receiver during teaching. Meanwhile, connection points are arranged on each module, so that students can easily connect the measuring instrument to the connection points during teaching, and the purpose of better completing teaching is achieved by detecting the receiver under the condition that the operation of the receiver is not affected.
The functions of each discrete module in the satellite navigation detection maintenance teaching are as follows:
The antenna module 37 is configured to receive satellite signals and transmit the satellite signals to the rf module 34.
The radio frequency module 34 is responsible for filtering the received antenna signal by a filter, amplifying the signal by a low noise amplifier, and then performing down-conversion processing to convert the signal into an analog intermediate frequency signal. The analog intermediate frequency signal is then converted into a digital intermediate frequency signal by an AD converter. The final digital intermediate frequency signal is sent to the baseband module 35 for subsequent processing.
The baseband module 35 is responsible for processing the digital intermediate frequency signals, and each channel thereof performs the operations of capturing, tracking, despreading, demodulating, etc. each satellite signal in parallel.
The resolving module 36 includes a processor, which can receive the navigation message, pseudo code, carrier phase and other original data output by the baseband module 35, perform positioning resolving, output NMEA data generated by the interface through a serial port, and output TTL serial port data.
The NMEA data output analysis is to connect a detection receiver with an RS-232 serial port on the detection overhaul bottom plate 1, monitor the navigation data of the Beidou receiver continuously output NMEA0183 format through NEMA data, and analyze visual satellite signal distribution, satellite signal intensity, positioning position, speed, time and other information through decoding software.
The clock module 32 is responsible for generating the 16M clock signal for use by other modules.
The interface module 31 is responsible for converting the TTL serial data output by the resolving module 36 into 232 or 422 level and outputting as the final result of the receiver.
As shown in fig. 2, in some embodiments, the service teaching device of the satellite navigation receiver further comprises a reference receiver 2. The reference receiver 2 is mounted on the service floor 1 for detecting ambient satellite signals. The reference receiver 2 can detect the satellite signal condition of the current environment, and smooth development of learning is ensured. Also, the reference receiver 2 can be used to detect the antenna feed and whether the antenna has problems.
Take the receiver of the Beidou satellite navigation system as an example. The discrete modules in the application are a Beidou radio frequency module 34, a Beidou antenna module 37, a Beidou baseband module 35, a Beidou resolving module 36, a clock module 32, a power module 33 and an interface module 31 aiming at the Beidou navigation satellite system receiver. Be provided with various tie points on each module wherein based on beidou navigation system receiver, the student can be through connecting the measuring instrument that is commonly used such as spectrum analyzer, universal meter and oscilloscope etc. on the tie point, just can obtain the operating condition of each module through measuring instrument, helps the student at the operating condition of each module of during operation, and can not influence the work of receiver. Each module is inserted on the overhaul bottom plate 1, so that each module can be easily replaced without complex and precise operation. In view of the fact that the teaching environment may have a weak satellite signal, a reference receiver 2 is also provided in the apparatus, through which reference receiver 2 the satellite signal problem can be known. Likewise, the reference receiver 2 may be used to detect whether there is a problem with the Beidou antenna feed and the Beidou antenna.
Such as: when the reference receiver 2 detects the environmental satellite signals, if the reference receiver 2 works normally for BDSB and GPS L1 satellite receiving and positioning, the environmental satellite signals are normal, otherwise, the environmental satellite signals are abnormal.
When the antenna feeder is detected by the reference receiver 2, if the satellite receiving positioning of BDSB and the GPS L1 by the reference receiver 2 works normally, the Beidou antenna feeder is a qualified product, otherwise, the Beidou antenna feeder is a fault product.
When the antenna is detected by the reference receiver 2, if the satellite receiving positioning work of the reference receiver 2 on BDSB and the GPS L1 is normal, the Beidou antenna is a qualified product, otherwise, the Beidou antenna is a fault product.
For better understanding of the role of the various modules in the receiver. The antenna module 37, the radio frequency module 34, the baseband module 35, the resolving module 36, the clock module 32, the power module 33, and the interface module 31 all have two types including: normal operation model and failure model.
The fault models corresponding to the same module are also various, and the fault models are designed for different faults respectively. During teaching, students can better understand what faults occur in different modules, and what influences are generated on the whole. So with each module grafting on the maintenance bottom plate 1 also can make the replacement of module more convenient, promote the efficiency of giving lessons, unnecessary consuming time in the reduction teaching. Therefore, in actual teaching, the teaching purpose can be realized by replacing the normal model of each module with the corresponding fault model.
In some embodiments, for convenience and brevity of replacement, each module is plugged on the overhaul base plate 1 through double rows of pins.
In some embodiments, in order to better understand the operation state of each module in the receiver, connection points are provided on each module, and the connection points include a voltage test connection point and a signal test connection point.
In some embodiments, the detection instrument comprises: multimeter, spectrometer and oscilloscope. The universal meter is used for being connected with the voltage test connection point; the spectrometer and the oscilloscope are used for being connected with the signal testing connection point.
Through the connection point and the detection instrument, the input signals, the pulse per second signals and the working voltage of each module can be detected.
Take the Beidou receiver of the Beidou navigation system as an example. When the Beidou radio frequency input signal is detected. And detecting a radio frequency input port on the Beidou radio frequency module 34 by using a spectrometer, and measuring in-band integrated power, wherein if the occurrence of envelope signals in BDS B1 and GPS L1 frequency bands is monitored by using the spectrometer, the radio frequency input signal is normal, otherwise, the radio frequency input signal is abnormal.
When the second pulse signal is detected, the Beidou receiver can output a PPS second pulse signal, the amplitude is 3.3V, the frequency is 1Hz, the pulse width is 10ms, the oscilloscope is used for measuring, if the oscilloscope can detect a 10ms rising edge square wave of 1 time per second, the second output signal is normal, and otherwise, the second pulse output signal is abnormal.
When the working voltage is detected, the universal meter is used for measuring the working voltages on the radio frequency power supply module 33, the baseband power supply module 33 and the clock module 32, the measured value is 10% of the nominal value, if the measured value meets the requirement, the working voltage is measured normally, otherwise, the working voltage is abnormal.
The following discloses the name of the connection point on each module, the connection point effect and the measurement method for the connection point.
The voltage test connection point and the signal test connection point set on the baseband module 35 and the test method thereof are as follows:
BB_VCC_5V: the connection point is a 5V voltage input from the power module 33, and the measurement point voltage is measured using a multimeter to check whether it is 5V.
BB_VCC_3.3V: the connection point is 3.3V voltage inputted from the power module 33, and the measurement point voltage is measured using a multimeter to check whether it is 3.3V.
BB_VCC_0.9V: the connection point is a voltage of 0.9V converted by the baseband module 35, and the measurement point voltage is measured with a multimeter to check whether it is 0.9V.
BB_VCC_1.8V: the connection point is 1.8V converted by the baseband module 35, and the measurement point voltage is measured with a multimeter to check whether it is 1.8V.
Sign_l1: the connection point is the SIGN signal of the L1 frequency point input by the radio frequency module 34, and the oscilloscope is used for checking the signal of the measurement point to check whether the waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
Mag_l1: the connection point is the MAG signal of the L1 frequency point input by the radio frequency module 34, and the measuring point signal is checked by an oscilloscope to check whether a waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
Clk_l1: the connection point is a clock signal of the L1 frequency point input by the radio frequency module 34, and the measurement point signal is checked by an oscilloscope to check whether a waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
Sign_b1: the connection point is the SIGN signal of the B1 frequency point input by the radio frequency module 34, and the oscilloscope is used for checking the signal of the measurement point to check whether the waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
Mag_b1: the connection point is the MAG signal of the B1 frequency point input by the radio frequency module 34, and the measuring point signal is checked by an oscilloscope to check whether the waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
Clk_b1: the connection point is a clock signal of the B1 frequency point input by the radio frequency module 34, and the measurement point signal is checked by an oscilloscope to check whether a waveform exists or not, and whether the waveform frequency and the amplitude are correct or not.
BB_CLK_16M: the connection point is a 16M clock signal input from the clock module 32, and the measurement point signal is checked by an oscilloscope to check whether there is a waveform, and whether the waveform frequency and amplitude are correct.
PPS: the connection point is a second pulse signal generated by the baseband module 35, and the oscilloscope is used for checking the measurement point, whether square wave signals exist or not, whether the period is 1Hz or not, and whether the amplitude is correct or not.
The voltage test connection point and the signal test connection point set on the resolving module 36 and the test method thereof are as follows:
Vcc_5v: the connection point is a 5V voltage input from the power module 33, and the measurement point voltage is measured with a multimeter to check whether it is 5V.
Vcc_3.3v: the connection point is 3.3V voltage inputted from the power module 33, and the measurement point voltage is measured with a multimeter to check whether it is 3.3V.
Vcc_1.3v: the connection point is 1.3V converted by the calculation module 36, and the measurement point voltage is measured with a multimeter to check whether it is 1.3V.
BB_VCC_1.8V: the connection point is 1.8V converted by the calculation module 36, and the measurement point voltage is measured with a multimeter to check whether it is 1.8V.
Clk_16m: the connection point is a 16M clock signal input from the clock module 32, and the measurement point signal is checked by an oscilloscope to check whether there is a waveform, and whether the waveform frequency and amplitude are correct.
Rxd0_lvttl: the connection point is a receiving pin of the serial port 0, and the level type is TTL level.
Txd0_lvttl: the connection point is a transmitting pin of the serial port 0, the level type of the connection point is TTL level, and an oscilloscope is used for checking whether the measurement point has a signal.
Rxd1_lvttl: the connection point is a receiving pin of the serial port 1, and the level type is TTL level.
Txd1_lvttl: the connection point is a transmitting pin of the serial port 1, the level type of the connection point is TTL level, and an oscilloscope is used for checking whether the measurement point has a signal.
The voltage test connection point and the signal test connection point set on the power module 33 and the test method thereof are as follows:
Vcc_5v: the connection point is a 5V voltage generated by the power module 33, and the measurement point voltage is measured with a multimeter to check whether it is 5V.
BB_VCC_3.3V: the connection point is 3.3V voltage generated by the power module 33 for feeding to the baseband module 35, and the measurement point voltage is measured with a multimeter to check whether it is 3.3V.
Dsp_vcc_3.3v: the connection point is 3.3V voltage generated by the power module 33, which is supplied to the resolving module 36, and the measurement point voltage is measured with a multimeter to check whether it is 3.3V.
The voltage test connection point and the signal test connection point set on the clock module 32 and the test method thereof are as follows:
Rf_clk_16m: the connection point is a 16M signal generated by the clock module 32, which is sent to the radio frequency module 34, and the oscilloscope is used to check the measurement point signal to see if there is a waveform, and the waveform frequency and amplitude are correct.
Dsp_clk_16m: the connection point is a 16M signal generated by the clock module 32, which is fed to the resolving module 36, and the measurement point signal is checked with an oscilloscope to see if there is a waveform, and the frequency and amplitude of the waveform are correct.
BB_CLK_16M: the connection point is a 16M signal generated by the clock module 32, which is sent to the baseband module 35, and the measurement point signal is checked by an oscilloscope to check whether there is a waveform, and whether the waveform frequency and amplitude are correct.
The voltage test connection point and the signal test connection point set on the interface module 31 and the test method thereof are as follows:
Io_vcc_3.3v: the connection point is 3.3V voltage inputted from the power module 33, and the measurement point voltage is measured with a multimeter to check whether it is 3.3V.
Rxd0_lvttl: the connection point is a receiving pin of serial port 0 of the resolving module 36, and the level type is TTL level.
Txd0_lvttl: the connection point is a transmitting pin of serial port 0 of the resolving module 36, the level type of which is TTL level, and an oscilloscope is used to check whether the measurement point has a signal.
Rxd1_lvttl: the connection point is a receiving pin of the serial port 1 of the resolving module 36, and the level type is TTL level.
Txd1_lvttl: the connection point is a transmitting pin of the serial port 1 of the resolving module 36, the level type is TTL level, and an oscilloscope is used for checking whether the measuring point has a signal.
RS232 rxd0: the connection point is a receiving pin of serial port 0 converted into 232 level, and an oscilloscope is used for checking whether the measurement point has a signal.
RS232 TXD0: the connection point is a transmitting pin of serial port 0 converted into 232 level, and an oscilloscope is used for checking whether the measurement point has a signal.
S422_txd0+: the connection point is a transmitting positive pin of the serial port 1 converted to 422 level, and an oscilloscope is used for checking whether the measurement point has a signal.
RS422 TXD0-: the connection point is a transmitting negative pin of the serial port 1 converted to 422 level, and an oscilloscope is used for checking whether the measurement point has a signal.
RS422 rxd0-: the connection point is a receiving negative pin of the serial port 1 converted to 422 level, and an oscilloscope is used for checking whether the measurement point has a signal.
S422_rxd0+: the connection point is a receiving positive pin of the serial port 1 converted to 422 level, and an oscilloscope is used for checking whether the measurement point has a signal.
The receiver overhaul teaching device is not limited to receiving satellite signals of a Beidou satellite navigation system. The satellite navigation system which is composed of an overhaul bottom plate, an antenna module, a radio frequency module, a baseband module, a resolving module, a clock module, a power module and an interface module and can be received comprises: the Beidou satellite navigation system (BDS), the Galileo satellite navigation system (GALILEO), the Global satellite navigation System (GPS) and the GLONASS satellite navigation system (GLONASS).
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Although the embodiments of the present invention are disclosed above, the embodiments are only used for the convenience of understanding the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the present disclosure as defined by the appended claims.
Claims (7)
1. An overhaul teaching device of a satellite navigation receiver, comprising:
The device comprises an overhaul bottom plate, an antenna module, a radio frequency module, a baseband module, a resolving module, a clock module, a power module and an interface module;
The overhaul bottom plate is provided with an inserting port, and a connecting circuit is arranged in the overhaul bottom plate;
The antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module are separately spliced on the plug-in interface;
The connecting circuit is used for connecting the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module;
the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module are respectively provided with connection points, and the connection points are used for connecting a detection instrument;
The connection points comprise a voltage test connection point and a signal test connection point;
The antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module and the interface module are all provided with two types, and the two types comprise: normal working model and fault model;
the maintenance teaching device of the satellite navigation receiver further comprises:
the reference receiver is arranged on the overhaul bottom plate and is used for detecting an environmental satellite signal;
The reference receiver can detect satellite signal conditions of the current environment, so that smooth development of teaching is ensured; the reference receiver may also be used to detect whether the antenna feed and the antenna are problematic.
2. The maintenance teaching device of a satellite navigation receiver according to claim 1, wherein the power module comprises:
The radio frequency power supply module is spliced on the overhaul bottom plate and is used for supplying power to the radio frequency module;
and the baseband power supply module is spliced on the overhaul bottom plate and is used for supplying power to the baseband module.
3. The maintenance teaching device of a satellite navigation receiver according to claim 1, wherein the working method of the radio frequency module comprises the following steps:
filtering the received signal;
Amplifying the signal by low noise amplification;
Performing frequency conversion processing on the amplified signal to convert the signal into an analog intermediate frequency signal;
And converting the analog intermediate frequency signal into a digital intermediate frequency signal and outputting the digital intermediate frequency signal to the baseband module.
4. The maintenance teaching device of the satellite navigation receiver according to claim 1, wherein the data output by the resolving module is TTL serial data.
5. The maintenance teaching device of claim 4, wherein the interface module converts the data output from the resolving module to 232 level or 422 level.
6. The maintenance teaching device of a satellite navigation receiver according to claim 1, wherein the detecting instrument comprises: the universal meter is used for being connected with a voltage test connection point; the spectrometer and the oscilloscope are used for being connected with a signal testing connection point.
7. The maintenance teaching device of any of claims 1 to 6, wherein the satellite navigation system receivable by the receiver comprising the maintenance base plate, the antenna module, the radio frequency module, the baseband module, the resolving module, the clock module, the power module, and the interface module comprises: the Beidou satellite navigation system (BDS), the Galileo satellite navigation system (GALILEO), the Global satellite navigation System (GPS) and the GLONASS satellite navigation system (GLONASS).
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