CN116133012B - Communication device, test method, system, equipment and storage medium - Google Patents

Communication device, test method, system, equipment and storage medium Download PDF

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Publication number
CN116133012B
CN116133012B CN202310395801.1A CN202310395801A CN116133012B CN 116133012 B CN116133012 B CN 116133012B CN 202310395801 A CN202310395801 A CN 202310395801A CN 116133012 B CN116133012 B CN 116133012B
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module
communication
positioning module
communication equipment
main control
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CN116133012A (en
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李国锋
万如
张树民
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Zhidao Network Technology Beijing Co Ltd
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Zhidao Network Technology Beijing Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G01S19/48—Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The application provides a communication device, a test method, a system, equipment and a storage medium, and relates to the technical field of vehicle-mounted communication, wherein the device comprises: communication equipment provided with a communication main control module and an internal positioning module, and an external auxiliary positioning module; the communication main control module and the internal positioning module are arranged on a circuit board of the communication equipment; the external auxiliary positioning module is connected with the test point of the circuit board through the probe; the internal positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in a first working state; the external auxiliary positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in the second working state so as to assist in testing the communication equipment. The continuous synchronous signal is provided for the communication equipment to be tested by the uninterruptible positioning module, the testing time is effectively shortened, and the testing efficiency of a factory is improved.

Description

Communication device, test method, system, equipment and storage medium
Technical Field
The present application relates to the field of vehicle-mounted communications technologies, and in particular, to a communications device, a test method, a system, a device, and a storage medium.
Background
The V2X device (vehicle to everything) may be used for vehicle-to-outside information exchange. The system and the method enable the vehicles to communicate with each other, the vehicles to communicate with the base station and the base station to further obtain a series of traffic information such as real-time road conditions, road information, pedestrian information and the like, thereby improving driving safety, reducing congestion, improving traffic efficiency, providing vehicle-mounted entertainment information and the like. The communication equipment such as V2X equipment and the like needs to rely on the synchronous signals provided by the GPS when in normal operation, and the positioning and time service information provided by an internal common GPS module is generally adopted when the communication equipment is independently used.
At present, normal operation of communication equipment such as V2X equipment depends on internal GPS synchronous information, and an internal GPS module generally needs more than 20s from power-on to synchronous state acquisition, and then the V2X complete machine equipment can start normal communication, so that when factory production test can be caused, the time for testing a single V2X equipment is longer, and further the factory production line test time is long.
Disclosure of Invention
In view of this, an object of the embodiments of the present application is to provide a communication device, a test method, a system, a device and a storage medium, by adding an external auxiliary positioning module and a power supply module, a probe is used to provide a synchronous signal for auxiliary test for a circuit board of a communication device, and meanwhile, a corresponding adaptation improvement is performed on the circuit board of the communication device, that is, a power supply module and a switch control unit are added, so that a continuous synchronous signal is provided for the communication device to be tested by using a positioning module without power failure, the test time is effectively reduced, and the factory test efficiency is improved.
In a first aspect, an embodiment of the present application provides a communication device, including: communication equipment provided with a communication main control module and an internal positioning module, and an external auxiliary positioning module; the communication main control module and the internal positioning module are arranged on a circuit board of the communication equipment; the external auxiliary positioning module is connected with the test point of the circuit board through a probe; the internal positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in a first working state; the external auxiliary positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in the second working state so as to assist in testing the communication equipment.
In the implementation process, the external auxiliary positioning module is adopted to provide the synchronous signal for the communication equipment to be tested, and meanwhile, the control information of the main control module in the communication equipment to be tested is adjusted to be in an external synchronous signal mode during factory testing, so that continuous synchronous signals are provided for the communication equipment to be tested by the positioning module without power failure, the testing time is effectively shortened, and the factory testing efficiency is improved.
Optionally, the communication master control module includes: a positioning data receiving interface and a synchronous pulse receiving interface; the internal positioning module comprises: a positioning data serial port and a synchronous pulse transmission interface are transmitted; the transmitting positioning data serial port is connected with the receiving positioning data interface through a first circuit board connecting wire, and the transmitting synchronous pulse interface is connected with the receiving synchronous pulse interface through a second circuit board connecting wire; the internal positioning module is used for providing synchronous signals for the communication equipment through the transmission of the first circuit board connecting wire and the second circuit board connecting wire when the control signal output by the communication main control module is high.
In the implementation process, through two-way transmission of the first circuit board connecting wire and the second circuit board connecting wire, the internal positioning module can provide synchronous pulse signals of time positioning data for the communication main control module, and the working efficiency of communication equipment is improved.
Optionally, the apparatus further comprises: an auxiliary test tool unit; the external auxiliary positioning module is arranged on the auxiliary test tool unit; the external auxiliary positioning module comprises: positioning a data synchronization probe and a synchronization pulse probe; the positioning data synchronous probe is connected with a test point on the first circuit board connecting line, and the synchronous pulse probe is connected with a test point on the second circuit board connecting line; the external auxiliary positioning module is used for providing a synchronous signal for the communication equipment through the transmission of the positioning data synchronous probe and the synchronous pulse probe when the control signal output by the communication main control module is low.
In the implementation process, the synchronous signal of the positioning data is provided for the main control module by the positioning data synchronous probe and the synchronous pulse probe of the external auxiliary positioning module when the communication equipment to be tested is tested, so that the continuous synchronous signal is provided for the communication equipment to be tested by the positioning module without power failure, the test time is effectively shortened, and the factory test efficiency is improved.
Optionally, the auxiliary test tool unit further includes: a power supply module; the power supply module includes: a power supply probe; the power supply probe is connected with a test point on the output end of a power supply module on the circuit board of the communication equipment; the power supply module is used for continuously supplying power to the external auxiliary positioning module when the control signal output by the communication main control module is low, and providing a synchronous signal for the communication equipment through the external auxiliary positioning module.
In the implementation process, the independent power supply module is arranged on the auxiliary test tool unit, so that the capability of continuous power supply and uninterrupted power supply of the external auxiliary positioning module can be ensured, the external auxiliary positioning module can continuously provide synchronous signals for the main control module conveniently, the test time is effectively shortened, and the factory test efficiency is improved.
Optionally, the apparatus further comprises: a power supply module and a switch control unit; the power module and the switch control unit are arranged on a circuit board of the communication equipment; the input end of the power supply module is connected with the communication main control module and the internal positioning module together, and the output end of the power supply module is connected with the switch control unit; the switch control unit is used for switching to a closed state when a control signal output by the communication main control module is high so as to control the power supply module to supply power to the internal positioning module and provide a synchronous signal for the communication equipment through the internal positioning module; the switch control unit is used for switching to a disconnection state when a control signal output by the communication main control module is low so as to receive power supply of the external auxiliary positioning module and provide a synchronous signal for the communication equipment through the external auxiliary positioning module.
In the implementation process, the control signal of the main control module can realize the switching of power supply of the internal GPS positioning module and the external auxiliary positioning module in a physical logic circuit mode through the matching of the power supply module and the switch control unit, so that the cost is low and the efficiency is high.
Optionally, the switch control unit includes: a transistor and a control resistor; the control signal output end of the communication main control module is connected with the control resistor, the control resistor is connected with one end of the transistor, and the other end of the transistor is connected with the output end of the power supply module.
In the implementation process, the switch control unit formed by the transistor and the control resistor is arranged, so that the control signal of the main control module can realize power supply switching of the internal GPS positioning module and the external auxiliary positioning module in a physical logic circuit mode, the control speed is high, the circuit cost is low, and the efficiency is high.
Optionally, the synchronization signal is obtained by the internal positioning module and the external auxiliary positioning module receiving satellite positioning signals by using a satellite positioning antenna.
In the implementation process, the synchronous signals of the internal positioning module and the external auxiliary positioning module are obtained by receiving satellite positioning signals through the satellite positioning antenna, so that the cost is low, the precision is high, and the efficiency is high.
In a second aspect, embodiments of the present application provide a testing method, where the method is applied to any of the communication devices; the communication device includes: communication equipment consisting of a communication main control module and an internal positioning module and an external auxiliary positioning module; the communication main control module and the internal positioning module are arranged on a circuit board of the communication equipment; the external auxiliary positioning module is connected with the test point of the circuit board through a probe; the method comprises the following steps: the internal positioning module is used for providing a synchronous signal for the communication equipment when the control signal output by the communication main control module is high; and when the control signal output by the vehicle-mounted main control module is low, the external auxiliary positioning module provides a synchronous signal for the communication equipment so as to assist in testing the communication equipment.
In the implementation process, the external auxiliary positioning module and the power supply part are placed on the test fixture, the probe is used for providing corresponding synchronous signals for the communication equipment, and meanwhile, corresponding adaptation improvement is carried out on the communication equipment, so that continuous synchronous signals can be provided for the communication equipment to be tested by the external auxiliary positioning module without power failure, the test time is effectively shortened, and the factory test efficiency is improved.
In a third aspect, embodiments of the present application further provide an electronic device, including: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method described above when the electronic device is run.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
In a fifth aspect, embodiments of the present application provide a test system, where the test system includes any one of the communication devices described above.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic functional block diagram of a communication device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a communication device according to an embodiment of the present application;
fig. 3 is a circuit block diagram of a communication device according to an embodiment of the present disclosure;
FIG. 4 is a flow chart of a test method provided in an embodiment of the present application;
fig. 5 is a block diagram of an electronic device that provides a testing method according to an embodiment of the present application.
Icon: 01-communication means; 10-communication equipment; 11-a communication master control module; 12-an internal positioning module; 13-an external auxiliary positioning module; 300-an electronic device; 311-memory; 312-a storage controller; 313-processor; 314-peripheral interface; 315-an input-output unit; 316-display unit.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
Before describing the embodiments of the present application, a brief description will be first made of technical concepts related to the present application.
PPS signal: (1) PPS is a low power pulse level signal, with a drive current of only 0.5mA, and 20mA more, with several synchronization nodes, and tens of times more difficult. (2) PPS is an unshielded single-wire pulse signal, and tens of PPS wires are shuttled inside the vehicle, and are extremely susceptible to the interference of the severe electromagnetic environment inside the vehicle, and at that time, it is not possible to distinguish whether it is an interference pulse or a synchronization pulse at all. (3) taking pps+gprmc as an example: the GPRMC sends a synchronous message through an RS232 serial port, wherein RS232 is a one-to-one full duplex communication mode, and a pair of several data transmission GNSS can output two pieces of information through a master-slave mode, and one piece of information is a synchronous pulse signal PPS with the time period of 1s and the pulse width of 5ms to 100ms; one is to output a GPRMC standard time synchronization message through a standard serial port.
V2X device: the necessary vehicle-mounted communication equipment in the vehicle-road cooperation field can provide communication among vehicles, roads and clouds. For the V2X device, a general GPS module is generally adopted in the V2X device, and a V2X module main control portion on a main board (circuit board) of the V2X device receives positioning and time service information provided by the internal GPS module: wherein time and positioning data are typically transmitted as a physical serial port to transmit NMEA-0183 code stream, pulses per second, and signals at 1pps level.
The inventors have noted that the proper operation of a communication device 10 such as a V2X device may depend on the synchronization signal provided by the internal GPS module. When the communication device 10 such as the V2X device is used independently, the positioning and time service information provided by the internal common GPS module is generally adopted, but when the device is used for factory production test, no matter the synchronous GPS satellite signal or the GPS signal simulator is adopted for providing the positioning and time service information, the synchronization time of the device is longer, and the problem of long testing time of the factory production line is caused. In view of this, the long power-on external auxiliary positioning module 13 of the external test fixture is used to provide the synchronization signal for the communication device 10 to be tested, and meanwhile, the control information of the main control module in the communication device 10 to be tested is adjusted to be in the external synchronization signal mode during the factory test, so that the test time can be effectively reduced, the production efficiency is improved, and in particular, the embodiment of the application provides a communication method as described below.
Referring to fig. 1, fig. 1 is a schematic functional block diagram of a communication device 01 according to an embodiment of the present application. The embodiments of the present application are explained in detail below. The device comprises: a communication device 10 provided with a communication main control module 11 and an internal positioning module 12, and an external auxiliary positioning module 13. The communication main control module 11 and the internal positioning module 12 are arranged on a circuit board of the communication equipment 10; the external auxiliary positioning module 13 is connected with the test point of the circuit board through a probe.
The internal positioning module 12 is configured to provide a synchronization signal to the communication device 10 when the communication master control module 11 is in the first working state; the external auxiliary positioning module 13 is configured to provide a synchronization signal to the communication device 10 when the communication master control module 11 is in the second working state, so as to assist in testing the communication device 10.
Illustratively, the first operating state may be: the communication master control module is switched to a certain working state by switching control modes, for example: the output control signal is set high; the second operating state may be: the communication master control module is switched to a certain working state by switching control modes, for example: the output control signal is set low. The communication device 10 may be: any communication device 10 that needs to communicate using positioning information generally needs to receive positioning and time information provided by the internal positioning module 12 for debugging testing during factory production testing. For example: the communication device 10 may be a V2X device shown in fig. 2, where a V2X module main control CPU (communication main control module 11) on a V2X device circuit board receives time and positioning data provided by an internal GPS module (internal positioning module 12) and PPS low-level synchronization pulse signals provided by the internal GPS module; the internal GPS module receives GPS satellite signal generation time and positioning data through a GPS antenna; the time and position data is typically transmitted as NMEA-0183 streams over a physical serial port, with the second pulses being signaled at the 1PPS level. The external auxiliary positioning module 13 may be: similar to the internal positioning module 12 on the circuit board of the communication device 10, the communication master control module 11 can provide the same positioning and time information, and the communication device 10 realizes signal transmission by the connection mode of the probe-circuit board test point, and is located outside the communication device 10. For example: the external auxiliary positioning module 13 is arranged on a test tool, and the test tool is connected with a circuit board of the communication equipment 10 to be tested in a probe mode to provide power supply and GPS synchronous signals for the circuit board; the probes are connected with corresponding test points on the circuit board, so that stable signals can be provided.
Alternatively, as shown in fig. 3, the communication device 10 is exemplified by a V2X device, and the positioning module is exemplified by a GPS module. The V2X main control module of the V2X equipment to be tested and the internal GPS module are basically consistent with the existing V2X equipment in FIG. 2, and the internal GPS module provides 1PPS and time positioning data synchronous signals for the V2X main control module. (1) When the V2X device to be tested works normally, a synchronization signal provided by an internal GPS module needs to be adopted: at this time, the main control module sets the CPU control signal Power_EN high, and the GPS module synchronizes the GPS signal output of the satellite to 1PPS and time position information to the V2X main control module, so that the V2X equipment works normally; (2) When the factory tests the V2X device to be tested, the V2X device needs to use the GPS synchronization signal provided by the external auxiliary positioning module 13: at this time, the main control module sets the CPU control signal power_en low, the internal GPS module does not output, and the GPS synchronization signal probe of the external auxiliary positioning module 13 collides with the corresponding test point of the V2X device circuit board, so as to provide a synchronization signal for the V2X device.
The external auxiliary positioning module 13 is adopted to provide the synchronous signal for the communication equipment 10 to be tested, and meanwhile, the control information of the main control module in the communication equipment 10 to be tested is adjusted to be in an external synchronous signal mode during factory testing, so that continuous synchronous signals are provided for the communication equipment 10 to be tested by the positioning module without power failure, the testing time is effectively shortened, and the factory testing efficiency is improved.
In one embodiment, the communication master control module 11 includes: a positioning data receiving interface and a synchronous pulse receiving interface; the internal positioning module 12 includes: a positioning data serial port and a synchronous pulse transmission interface are transmitted; the transmitting positioning data serial port is connected with the receiving positioning data interface through a first circuit board connecting wire, and the transmitting synchronous pulse interface is connected with the receiving synchronous pulse interface through a second circuit board connecting wire;
the internal positioning module 12 is configured to provide a synchronization signal to the communication device 10 through transmission of the first circuit board connection line and the second circuit board connection line when the control signal output by the communication master control module 11 is set high.
Illustratively, the first circuit board connection line may be: the transmission lines of the communication master control module 11 and the internal positioning module 12 for receiving and transmitting time and positioning data can be serial connection lines, and the transmission lines are used for transmitting the time positioning data of the NMEA-0183 code stream in a physical serial form, and are positioned on a circuit board where the communication equipment 10 is positioned. The second circuit board connection line may be: the transmission lines of the communication master control module 11 and the internal positioning module 12 for receiving and transmitting the synchronous pulse signals can be any communicated wires, and the synchronous pulse signals are transmitted in a 1pps level second pulse form, and are positioned on a circuit board where the communication equipment 10 is positioned.
With continued reference to fig. 3, the positioning data receiving interface and the synchronization pulse receiving interface may be a "positioning data acquiring unit" and a "pps_in" interface of the main control CPU IN the figure, and the positioning data transmitting serial port and the synchronization pulse transmitting interface may be a "uart_tx" serial port and a "1PPS" interface of the internal GPS module IN the figure, respectively; the V2X main control module and the internal GPS module of the V2X equipment to be tested are connected physically through two paths of connecting wires. When the V2X device to be tested works normally, a synchronization signal provided by an internal GPS module needs to be adopted: at this time, the main control module sets the CPU control signal Power_EN high, and the internal GPS module transmits through two paths of the first circuit board connecting wire and the second circuit board connecting wire to provide synchronous signals of 1PPS and time positioning data for the V2X main control module.
Through two transmissions of the first circuit board connecting wire and the second circuit board connecting wire, the internal positioning module 12 can provide synchronous pulse signals of time positioning data for the communication main control module 11, and the working efficiency of the communication equipment 10 is improved.
In one embodiment, the communication device 01 further comprises: an auxiliary test tool unit; the external auxiliary positioning module 13 is arranged on the auxiliary test tool unit; the external auxiliary positioning module 13 includes: positioning a data synchronization probe and a synchronization pulse probe; the positioning data synchronous probe is connected with a test point on a connecting line of the first circuit board, and the synchronous pulse probe is connected with a test point on a connecting line of the second circuit board; the external auxiliary positioning module 13 is configured to provide a synchronization signal to the communication device 10 through transmission of the positioning data synchronization probe and the synchronization pulse probe when the control signal output by the communication master control module 11 is set low.
For example, the external auxiliary positioning module 13 may be disposed on the auxiliary test fixture unit by using a common GPS module, and receives satellite GPS signals to obtain synchronization signals, and provides the synchronization signals to the V2X device to be tested. The auxiliary test tool unit is connected with the circuit board of the communication equipment 10 to be tested in a probe mode, and provides power supply and GPS synchronous signals for the circuit board; the probes are connected with corresponding test points on the circuit board, so that stable signals can be provided. Particularly, the external auxiliary positioning module 13 is not powered off in the test process, and can continuously provide a synchronous signal for the V2X equipment to be tested, and the synchronous signal can be obtained as soon as the V2X equipment to be tested is powered on, so that the test efficiency is improved.
As shown in fig. 3, the circuit board of the V2X communication device 10 to be tested has probe test points therein: the V2X internal probe test point is used for being connected with a probe of the test fixture, and the related test points comprise a 1PPS probe test point and a UART_TX probe test point; the 1PPS probe test point is arranged on a 1PPS interface transmission line (synchronous pulse probe) of the external GPS module and is used for replacing a second circuit board transmission line to transmit PPS level pulse signals; the UART_TX probe test point is arranged on a UART_TX serial port transmission line (positioning data synchronous probe) of the external GPS module and is used for replacing the transmission time and positioning data of the transmission line of the first circuit board. When the factory tests the V2X equipment to be tested, the V2X equipment needs to adopt the GPS synchronous signal provided by the external GPS module, at the moment, the main control module sets the CPU control signal Power_EN low, the internal GPS module does not output the GPS synchronous signal, and the GPS synchronous signal probe of the external GPS module is abutted against the corresponding test point of the circuit board of the V2X equipment to provide the synchronous signal for the V2X equipment.
By using the synchronous probe of the positioning data and the synchronous pulse probe of the external auxiliary positioning module 13 to provide the synchronous signal of the positioning data for the main control module when the communication equipment 10 to be tested is tested, the continuous synchronous signal is provided for the communication equipment 10 to be tested by using the positioning module without power off, the test time is effectively shortened, and the factory test efficiency is improved.
In one embodiment, the auxiliary test tooling unit further comprises: a power supply module; the power supply module includes: a power supply probe; the power probe is connected with a test point on the output end of a power module on the circuit board of the communication equipment 10; the power supply module is configured to continuously supply power to the external auxiliary positioning module 13 when the control signal output by the communication main control module 11 is low, and provide a synchronization signal to the communication device 10 through the external auxiliary positioning module 13.
For example, in addition to the necessary external auxiliary positioning module 13, an independent power supply module may be further disposed on the auxiliary test fixture unit, so as to ensure the capability of the external auxiliary positioning module 13 to continuously supply power and not to break power. The auxiliary test tool unit supplies power to the communication equipment 10 and is provided on a test point of a power supply probe on a circuit board of the communication equipment 10 to replace continuous power supply after internal power failure. As shown in fig. 3, the circuit board of the V2X communication device 10 to be tested has a probe test point inside, and the V2X internal probe test point is connected with a probe of the auxiliary test fixture unit to transmit related signals, and the related test point includes a power supply probe test point in addition to a 1PPS probe test point and a uart_tx probe test point. When the factory tests the V2X equipment to be tested, the main control module sets the CPU control signal Power_EN low, and three probes on the auxiliary test tool unit are abutted against corresponding test points of the V2X equipment circuit board to continuously provide synchronous signals for the V2X equipment.
By arranging the independent power supply module on the auxiliary test tool unit, the capability of continuous power supply and uninterrupted power of the external auxiliary positioning module 13 can be ensured, the external auxiliary positioning module 13 can continuously provide synchronous signals for the main control module conveniently, the test time is effectively shortened, and the factory test efficiency is improved.
In one embodiment, the communication device 01 further comprises: a power supply module and a switch control unit; the power supply module and the switch control unit are arranged on a circuit board of the communication equipment 10; the input end of the power supply module is connected with the communication main control module 11 and the internal positioning module 12 together, and the output end of the power supply module is connected with the switch control unit; the switch control unit is used for switching to a closed state when a control signal output by the communication main control module 11 is high so as to control the power supply module to supply power to the internal positioning module 12 and provide a synchronous signal for the communication equipment 10 through the internal positioning module 12; the switch control unit is configured to switch to an off state when a control signal output from the communication main control module 11 is low, so as to receive power supplied from the external auxiliary positioning module 13, and provide a synchronization signal to the communication device 10 through the external auxiliary positioning module 13.
Illustratively, the power module, the switch control unit, may be considered as an adaptive assembly retrofit to the interior of the communication device 10 for more convenient introduction or control of the external auxiliary positioning module 13 to provide a synchronization signal to the master control module. Optionally, the V2X device of fig. 2 is adapted, and the internal GPS module uses a new power supply unit (power supply module) having a switching signal and controlled by the main control module CPU through the control switch control unit. As shown in fig. 3, a switch control unit is newly added on the output channel of the Power module, the control signal power_en of the main control module is shared with the control signal of the radio frequency switch chip, and when the control signal power_en is low level, the switch of the switch control unit is disconnected and does not supply Power to the internal GPS module, and the Power supply of the external auxiliary positioning module 13 is received; when the control signal Power_EN is high, the switch of the switch control unit is closed to supply Power to the internal GPS.
(1) When the equipment is normal, the synchronous signal provided by the internal GPS module is adopted, the master control module sets the power_EN high, the switch of the switch control unit is closed, the Power supply module supplies Power to the internal GPS module, the GPS module synchronizes the satellite GPS signal output 1PPS and time position information to the V2X module, and the V2X equipment works normally. (2) During factory testing, the auxiliary test tool unit is used for providing GPS synchronous signals, the master control module sets power_EN low, the switch of the switch control unit is disconnected, the internal GPS module does not output, the GPS synchronous signal probes (1 PPS and UART_TX) and the Power supply probes on the auxiliary test tool unit are abutted against corresponding test points of the single board, and synchronous signals are provided for the V2X module of the equipment.
Through the cooperation of power module and switch control unit for the control signal of main control module can be with the switching of the power supply of the outside auxiliary positioning module 13 of the inside GPS positioning module of form realization with the physical logic circuit, with low costs, efficient.
In one embodiment, the switch control unit includes: a transistor and a control resistor; the control signal output end of the communication main control module 11 is connected with a control resistor, the control resistor is connected with one end of a transistor, and the other end of the transistor is connected with the output end of the power supply module.
The switch control unit may be a logic switch circuit composed of a transistor and a control resistor, and the transistor may be an NPN transistor, a MOS transistor, or the like. As shown in fig. 3, the switch control circuit is implemented by an NPN transistor Q1, a P-MOS transistor Q2, and corresponding control resistors. The control signal output end (Power_EN) of the CPU of the V2X master control module is connected with a control resistor R1, the control resistor R1 is connected with one end of a transistor Q1, the transistor Q1 is connected with a transistor Q2, and the other end of the transistor Q2 is connected with the output end of the 3.3V Power supply module; the corresponding ends of the NPN tube Q1 and the P-MOS tube Q2 are connected with respective control resistors R2, R3 and R4.
The switch control unit composed of the transistor and the control resistor is arranged, so that the control signal of the main control module can realize power supply switching of the internal GPS positioning module and the external auxiliary positioning module 13 in the form of a physical logic circuit, the control speed is high, the circuit cost is low, and the efficiency is high.
In one embodiment, the synchronization signal is obtained by the internal positioning module 12 and the external auxiliary positioning module 13 receiving satellite positioning signals using a satellite positioning antenna.
For example, the internal positioning module 12 and the external auxiliary positioning module 13 can both adopt a common GPS module, receive satellite GPS signals by using a satellite positioning antenna of the GPS module to obtain time positioning data, and transmit NMEA-0183 code stream and 1pps level second pulse synchronous signals after being processed by logic circuits of the internal positioning module 12 and the external auxiliary positioning module 13. The synchronous signals of the internal positioning module 12 and the external auxiliary positioning module 13 are obtained by receiving satellite positioning signals through the satellite positioning antenna, so that the cost is low, the precision is high, and the efficiency is high.
Referring to fig. 4, fig. 4 is a flowchart of a testing method according to an embodiment of the present application. The method is applied to the communication device 01. The communication device 01 includes: a communication device 10 composed of a communication main control module 11 and an internal positioning module 12, and an external auxiliary positioning module 13; the communication main control module 11 and the internal positioning module 12 are arranged on a circuit board of the communication equipment 10; the external auxiliary positioning module 13 is connected with the test point of the circuit board through a probe. The test method comprises the following steps: step 100 and step 120.
Step 100: the internal positioning module 12 provides a synchronizing signal for the communication equipment 10 when the control signal output by the communication main control module 11 is set high;
step 120: when the control signal output by the vehicle-mounted main control module is low, the external auxiliary positioning module 13 provides a synchronous signal for the communication equipment 10 to assist in testing the communication equipment 10.
Illustratively, the communication device 10 is exemplified by a V2X device, and the internal positioning module 12 and the external auxiliary positioning module 13 are exemplified by a GPS module, respectively. When the equipment is electrified, the default equipment is in a normal working mode, and at the moment, a Power switch signal Power_EN of the GPS module is set high, and a V2X module adopts a synchronous signal provided by an internal GPS unit; when the device is detected to be in a factory test state, the master control sets power_EN low, the GPS module in the device is powered off, and the V2X module adopts a synchronous signal provided on the fixture probe for testing.
Through putting outside auxiliary positioning module 13 and power part on test fixture, utilize the probe to provide corresponding synchronization signal for communications facilities 10, carry out corresponding adaptation improvement on the communications facilities 10 simultaneously, can realize utilizing the outside auxiliary positioning module 13 of uninterrupted power supply to provide continuous synchronization signal for communications facilities 10 that await measuring, reduce test time effectively, improve mill's test efficiency.
Referring to fig. 5, fig. 5 is a block schematic diagram of an electronic device. The electronic device 300 may include a memory 311, a memory controller 312, a processor 313, a peripheral interface 314, an input output unit 315, a display unit 316. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 5 is merely illustrative and is not intended to limit the configuration of the electronic device 300. For example, electronic device 300 may also include more or fewer components than shown in FIG. 5, or have a different configuration than shown in FIG. 5.
The above-mentioned memory 311, memory controller 312, processor 313, peripheral interface 314, input/output unit 315, and display unit 316 are electrically connected directly or indirectly to each other to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The processor 313 is used to execute executable modules stored in the memory.
The Memory 311 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-Only Memory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc. The memory 311 is configured to store a program, and the processor 313 executes the program after receiving an execution instruction, and a method executed by the electronic device 300 defined by the process disclosed in any embodiment of the present application may be applied to the processor 313 or implemented by the processor 313.
The processor 313 may be an integrated circuit chip having signal processing capabilities. The processor 313 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (digital signal processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The peripheral interface 314 couples various input/output devices to the processor 313 and the memory 311. In some embodiments, the peripheral interface 314, the processor 313, and the memory controller 312 may be implemented in a single chip. In other examples, they may be implemented by separate chips.
The input/output unit 315 is used for providing input data to a user. The input/output unit 315 may be, but is not limited to, a mouse, a keyboard, and the like.
The display unit 316 provides an interactive interface (e.g., a user interface) between the electronic device 300 and a user for reference. In this embodiment, the display unit 316 may be a liquid crystal display or a touch display. The liquid crystal display or the touch display may display a process of executing the program by the processor.
The electronic device 300 in the present embodiment may be used to perform each step in each method provided in the embodiments of the present application.
Furthermore, the embodiments of the present application also provide a computer readable storage medium, on which a computer program is stored, which when being executed by a processor performs the steps in the above-described method embodiments.
The embodiment of the application also provides a test system, which comprises the communication device introduced by the embodiment. Optionally, the test system is applied to a test scenario for improving the factory production efficiency of the V2X device, and the long power-on external auxiliary positioning module 13 (for example, a GPS module) of the external tool is used to provide a synchronization signal for the communication device 10 to be tested, and meanwhile, the communication device 10 to be tested is adjusted to be in a mode of adopting the external synchronization signal during factory test, so that the test time can be effectively reduced, and the production efficiency can be improved.
The computer program product of the above method provided in the embodiments of the present application includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to perform steps in the above method embodiment, and specifically, reference may be made to the above method embodiment, which is not described herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, and the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
It should be noted that the functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM) random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (11)

1. A communication device, comprising: the communication equipment is provided with a communication main control module and an internal positioning module, and an external auxiliary positioning module and an auxiliary test tool unit;
the communication main control module and the internal positioning module are arranged on a circuit board of the communication equipment; the external auxiliary positioning module is connected with the test point of the circuit board through a probe;
the internal positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in a first working state; the external auxiliary positioning module is used for providing a synchronous signal for the communication equipment when the communication main control module is in a second working state so as to assist in testing the communication equipment; the first working state is as follows: the communication equipment is in a normal working state; the second working state is as follows: a state of testing the communication device;
The external auxiliary positioning module and the power supply module are arranged on the auxiliary test tool unit; the external auxiliary positioning module is used for carrying out the test of the communication equipment in an auxiliary way through the probe on the auxiliary test tool unit; the power supply module is used for continuously supplying power to the external auxiliary positioning module.
2. The apparatus of claim 1, wherein the communication master module comprises: a positioning data receiving interface and a synchronous pulse receiving interface; the internal positioning module comprises: a positioning data serial port and a synchronous pulse transmission interface are transmitted;
the transmitting positioning data serial port is connected with the receiving positioning data interface through a first circuit board connecting wire, and the transmitting synchronous pulse interface is connected with the receiving synchronous pulse interface through a second circuit board connecting wire;
the internal positioning module is used for providing synchronous signals for the communication equipment through the transmission of the first circuit board connecting wire and the second circuit board connecting wire when the control signal output by the communication main control module is high.
3. The apparatus of claim 2, wherein the external assisted positioning module comprises: positioning a data synchronization probe and a synchronization pulse probe;
The positioning data synchronous probe is connected with a test point on the first circuit board connecting line, and the synchronous pulse probe is connected with a test point on the second circuit board connecting line;
the external auxiliary positioning module is used for providing a synchronous signal for the communication equipment through the transmission of the positioning data synchronous probe and the synchronous pulse probe when the control signal output by the communication main control module is low.
4. The apparatus of claim 3, wherein the device comprises a plurality of sensors,
the power supply module includes: a power supply probe; the power supply probe is connected with a test point on the output end of a power supply module on the circuit board of the communication equipment;
the power supply module is used for continuously supplying power to the external auxiliary positioning module when the control signal output by the communication main control module is low, and providing a synchronous signal for the communication equipment through the external auxiliary positioning module.
5. The apparatus of claim 1, wherein the apparatus further comprises: a power supply module and a switch control unit;
the power module and the switch control unit are arranged on a circuit board of the communication equipment; the input end of the power supply module is connected with the communication main control module and the internal positioning module together, and the output end of the power supply module is connected with the switch control unit;
The switch control unit is used for switching to a closed state when a control signal output by the communication main control module is high so as to control the power supply module to supply power to the internal positioning module and provide a synchronous signal for the communication equipment through the internal positioning module; the switch control unit is used for switching to a disconnection state when a control signal output by the communication main control module is low so as to receive power supply of the external auxiliary positioning module and provide a synchronous signal for the communication equipment through the external auxiliary positioning module.
6. The apparatus of claim 5, wherein the switch control unit comprises: a transistor and a control resistor;
the control signal output end of the communication main control module is connected with the control resistor, the control resistor is connected with one end of the transistor, and the other end of the transistor is connected with the output end of the power supply module.
7. The apparatus of any one of claims 1-6, wherein the synchronization signal is obtained by the internal positioning module and external assisted positioning module receiving satellite positioning signals using a satellite positioning antenna.
8. A method of testing, wherein the method is applied to a communication device according to any one of claims 1 to 7; the communication device includes: communication equipment consisting of a communication main control module and an internal positioning module, an external auxiliary positioning module and an auxiliary test tool unit; the communication main control module and the internal positioning module are arranged on a circuit board of the communication equipment; the external auxiliary positioning module is connected with the test point of the circuit board through a probe; the external auxiliary positioning module and the power supply module are arranged on the auxiliary test tool unit; the method comprises the following steps:
the internal positioning module is used for providing a synchronous signal for the communication equipment when the control signal output by the communication main control module is high or the communication equipment is in a normal working state;
and when the control signal output by the communication main control module is low or the communication equipment is tested, the external auxiliary positioning module and the power supply module continuously provide synchronous signals for the communication equipment so as to assist in testing the communication equipment through the probes on the auxiliary test tool unit.
9. An electronic device, comprising: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method of claim 8 when the electronic device is run.
10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to claim 8.
11. A test system comprising a communication device according to any one of claims 1-7.
CN202310395801.1A 2023-04-14 2023-04-14 Communication device, test method, system, equipment and storage medium Active CN116133012B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160138887A (en) * 2015-05-26 2016-12-06 한국교통대학교산학협력단 Traffic satety service test system
CN111191379A (en) * 2020-01-08 2020-05-22 河北工业大学 Virtual scene testing system and method for V2X early warning application
CN114019888A (en) * 2022-01-07 2022-02-08 智道网联科技(北京)有限公司 Communication control circuit and method for vehicle-mounted device, vehicle-mounted device and vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107728491B (en) * 2017-09-27 2020-09-29 重庆邮电大学 V2X car networking is at ring simulation system
CN109618303A (en) * 2018-12-11 2019-04-12 安徽江淮汽车集团股份有限公司 A kind of novel V2X system performance testing system
CN113671850A (en) * 2020-05-13 2021-11-19 广州汽车集团股份有限公司 Simulation test system and method for tested V2X vehicle networking terminal
CN114401501A (en) * 2022-01-14 2022-04-26 智道网联科技(北京)有限公司 Time service device and time service method for vehicle-mounted unit of V2X, vehicle V2X device and vehicle
CN218387926U (en) * 2022-09-02 2023-01-24 智道网联科技(北京)有限公司 EMC darkroom test system for V2X equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160138887A (en) * 2015-05-26 2016-12-06 한국교통대학교산학협력단 Traffic satety service test system
CN111191379A (en) * 2020-01-08 2020-05-22 河北工业大学 Virtual scene testing system and method for V2X early warning application
CN114019888A (en) * 2022-01-07 2022-02-08 智道网联科技(北京)有限公司 Communication control circuit and method for vehicle-mounted device, vehicle-mounted device and vehicle

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