CN116436496A - Bluetooth radio frequency signal frequency offset testing device, method and system - Google Patents
Bluetooth radio frequency signal frequency offset testing device, method and system Download PDFInfo
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- CN116436496A CN116436496A CN202310480164.8A CN202310480164A CN116436496A CN 116436496 A CN116436496 A CN 116436496A CN 202310480164 A CN202310480164 A CN 202310480164A CN 116436496 A CN116436496 A CN 116436496A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/73—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for taking measurements, e.g. using sensing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- 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
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Abstract
The invention provides a device, a method and a system for testing frequency offset of a Bluetooth radio frequency signal, wherein the device comprises: the MCU is connected with a Bluetooth modulation clock output pin of a Bluetooth chip in the tested device, and is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested device and calculating the frequency offset value of the modulation frequency; one end of the serial port is connected with the MCU, the other end of the serial port is connected with the upper computer, and the frequency offset value calculated by the MCU is sent to the upper computer; and the crystal oscillator is connected with the MCU and used for providing a reference for calculating the frequency offset value of the Bluetooth radio frequency signal of the tested equipment. According to the Bluetooth radio frequency signal frequency offset testing device provided by the embodiment of the invention, the MCU hardware is connected with the Bluetooth chip of the tested equipment, the modulation frequency of the Bluetooth radio frequency signal is directly obtained, the interference caused by wireless transmission signals among the Bluetooth chips of the testing device is reduced, an independent Bluetooth chip is not needed, the cost is low, the modulation frequency of the Bluetooth radio frequency signal of the tested equipment is directly obtained, the turning calculation is reduced, and the data is more accurate.
Description
Technical Field
The invention relates to the technical field of Bluetooth equipment testing, in particular to a device, a method and a system for testing Bluetooth radio frequency signal frequency offset.
Background
In the production process of bluetooth equipment, the frequency offset test of bluetooth radio frequency signals is also quite important. The current common test method is to calculate the frequency offset by the Bluetooth communication of the test equipment and the tested equipment and by using the synchronous time of the data packet in the Bluetooth communication process, wherein the test equipment comprises an MCU, a serial port for the MCU to communicate with a PC, a crystal oscillator and a Bluetooth chip, and the serial port is used for transmitting the Bluetooth radio frequency signal frequency offset calculated by the MCU to the PC.
In the method for testing the Bluetooth radio frequency signal frequency offset in the prior art, as shown in fig. 1, a schematic diagram of a connection structure between a testing device and tested equipment in the prior art is shown, each testing device needs to be provided with a Bluetooth chip, and the cost is high; during testing, data packets are transmitted between Bluetooth chips through wireless transmission signals, the MCU in the testing device calculates Bluetooth radio frequency signal frequency offset of tested equipment according to the transmission frequency of the data packets, and errors are easy to generate in the calculation process; when the production lines are more and the test devices are more, the signal interference is serious, and the test devices and the production lines cannot be laid in a large scale.
Disclosure of Invention
In view of the above, the invention provides a device, a method and a system for testing frequency offset of a Bluetooth radio frequency signal, which solve the problems of high equipment cost and serious signal interference in a production line in the prior art for testing frequency offset of the Bluetooth radio frequency signal.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a device for testing frequency offset of a bluetooth radio frequency signal, where the device includes:
the MCU is connected with a Bluetooth modulation clock output pin of a Bluetooth chip in the tested device, and is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested device and calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device;
the serial port, one end is connected with MCU, another end is connected with upper computer, the frequency offset value calculated by said MCU is sent to the upper computer, the upper computer sends the preset modulation frequency value to MCU;
and the crystal oscillator is connected with the MCU and used for providing a reference for measuring the modulation frequency value of the Bluetooth radio frequency signal of the tested equipment.
Optionally, the crystal oscillator is a high-precision crystal oscillator, and the error of the crystal oscillator is +/-20 PPM.
According to the Bluetooth radio frequency signal frequency offset testing device provided by the embodiment of the invention, an independent Bluetooth chip is not needed, and the modulation frequency of the Bluetooth radio frequency signal of the equipment to be tested is directly obtained through the MCU, so that the structure of the testing device is simplified, and the cost is reduced.
In a second aspect, an embodiment of the present invention provides a method for testing frequency offset of a bluetooth radio frequency signal, which is applied to an MCU in the device for testing frequency offset of a bluetooth radio frequency signal in the first aspect, where the method includes:
acquiring the modulation frequency of a Bluetooth radio frequency signal of the tested equipment based on the crystal oscillator frequency of the testing device;
and calculating the frequency offset value of the Bluetooth radio frequency signal of the tested equipment by taking the preset modulation frequency value as a reference.
Optionally, the calculating the frequency offset value of the bluetooth radio frequency signal of the tested device includes:
subtracting a preset modulation frequency value from the modulation frequency of the Bluetooth radio frequency signal, and taking an absolute value as a frequency offset value of the Bluetooth radio frequency signal of the tested device by the obtained result, wherein the preset modulation frequency value is input by an upper computer through a serial port.
Optionally, the method further comprises:
and judging whether the tested equipment is qualified or not by comparing the frequency offset value with a preset frequency offset range.
Optionally, the judging standard for judging whether the tested device is qualified is:
if the frequency offset value exceeds the preset frequency offset range, outputting 0, and representing that the tested equipment is unqualified;
if the frequency offset value does not exceed the preset frequency offset range, outputting '1', and representing that the tested equipment is qualified.
According to the Bluetooth radio frequency signal frequency offset testing method provided by the embodiment of the invention, the Bluetooth chips are connected through hardware, so that the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, the interference caused by wireless transmission signals among the Bluetooth chips when the production lines are more and the testing devices are more is reduced, and meanwhile, the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, and the turning calculation through the data packet is reduced, so that the obtained data is more accurate.
In a third aspect, an embodiment of the present invention provides a system for testing frequency offset of a bluetooth radio frequency signal, where the system includes:
the acquisition module is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested equipment based on the crystal oscillator frequency of the testing device;
the calculating module is used for calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device by taking the preset modulation frequency value as a reference.
According to the Bluetooth radio frequency signal frequency offset testing system provided by the embodiment of the invention, the Bluetooth chips are connected through hardware, so that the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, the interference caused by wireless transmission signals among the Bluetooth chips when the production lines are more and the testing devices are more is reduced, and meanwhile, the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, and the turning calculation through the data packet is reduced, so that the obtained data is more accurate.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing computer instructions for causing a computer to perform the method of the second aspect, or any one of the optional embodiments of the second aspect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a device for testing frequency offset of bluetooth radio frequency signals in the prior art according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a testing device for bluetooth radio frequency signal frequency offset according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for testing frequency offset of a bluetooth radio frequency signal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a test system for bluetooth radio frequency signal frequency offset according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The technical features of the different embodiments of the invention described below may be combined with one another as long as they do not conflict with one another.
Example 1
The embodiment of the invention provides a testing device for Bluetooth radio frequency signal frequency offset, as shown in fig. 1, the testing device comprises:
the MCU is connected with a Bluetooth modulation clock output pin of a Bluetooth chip in the tested device, and is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested device and calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device; the serial port, one end connects MCU, another end connects the upper computer, is used for sending the frequency offset value calculated by MCU to the upper computer, the upper computer sends the value of the preset modulation frequency to MCU; and the crystal oscillator is connected with the MCU and used for providing a reference for measuring the modulation frequency of the Bluetooth radio frequency signal of the tested equipment. Specifically, in one embodiment, the crystal oscillator is a high-precision crystal oscillator, and the error is ±20PPM.
As shown in fig. 2, a schematic connection diagram of a test device and a tested device is shown, the tested device is provided with bluetooth chips, each bluetooth chip is provided with a special bluetooth modulation clock output pin, an MCU is directly connected with the bluetooth modulation clock output pin, when the tested device sends a bluetooth radio frequency signal, the modulation frequency of the bluetooth radio frequency signal is output through the bluetooth modulation clock output pin, and the MCU in the test device detects the clock signal frequency output by the bluetooth modulation clock output pin.
According to the Bluetooth radio frequency signal frequency offset testing device provided by the embodiment of the invention, an independent Bluetooth chip is not needed, the modulation frequency of the Bluetooth radio frequency signal of the equipment to be tested is directly obtained through the MCU, the structure of the testing device is simplified, the cost is low, and the maintenance is easy.
Example 2
The embodiment of the invention provides a testing method of Bluetooth radio frequency signal frequency offset, which is applied to an MCU in a testing device of Bluetooth radio frequency signal frequency offset of embodiment 1, as shown in FIG. 3, and comprises the following steps:
step S1: and acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested equipment based on the crystal oscillator frequency of the testing device. The tested equipment is provided with a Bluetooth chip, and the tested equipment sends the data packet, and simultaneously sends the modulation clock frequency of the Bluetooth data packet through a Bluetooth modulation clock output pin of the Bluetooth chip, so that the modulation frequency of the Bluetooth radio frequency signal of the tested equipment obtained by the MCU is more accurate based on the high-precision crystal oscillator frequency of the testing device.
Step S2: and calculating the Bluetooth radio frequency signal frequency offset value of the tested equipment by taking the preset modulation frequency value as a reference. The process of calculating the Bluetooth radio frequency signal frequency offset value of the tested equipment by taking the preset modulation frequency value provided by the upper computer as a reference is different from the existing process of generating more Bluetooth signal interference based on the Bluetooth wireless transmission signal and the existing test equipment.
Specifically, in an embodiment, calculating the frequency offset value of the bluetooth radio frequency signal of the tested device includes: subtracting a preset modulation frequency value from the modulation frequency of the Bluetooth radio frequency signal, and taking an absolute value as a frequency offset value of the Bluetooth radio frequency signal of the tested device by the obtained result, wherein the preset modulation frequency value is input by the upper computer through the serial port. And further judging whether the tested equipment is qualified or not by comparing the frequency offset value with a preset frequency offset range.
Specifically, in one embodiment, the criterion for determining whether the device under test is acceptable is: if the frequency offset value exceeds the preset frequency offset range, outputting 0, and representing that the tested equipment is unqualified; if the frequency offset value does not exceed the preset frequency offset range, outputting a 1, representing that the tested equipment is qualified, and uploading the output result to an upper computer to directly obtain the checking test result.
According to the Bluetooth radio frequency signal frequency offset testing method, the Bluetooth chips are connected through hardware, the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, interference caused by wireless transmission signals among the Bluetooth chips when the production lines are more and the testing devices are more can be avoided, meanwhile, the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, turning calculation through data packets is reduced, and the obtained data are more accurate.
Example 3
The embodiment of the invention provides a system for testing frequency offset of a Bluetooth radio frequency signal, as shown in fig. 4, the system comprises:
the acquisition module 1 is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested device based on the crystal oscillator frequency of the testing device. Details refer to the related description of step S1 in the above method embodiment, and will not be described herein.
And the calculating module 2 is used for calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device by taking the preset modulation frequency value as a reference. For details, refer to the related description of step S2 in the above method embodiment, and no further description is given here.
According to the Bluetooth radio frequency signal frequency offset testing system provided by the embodiment of the invention, the Bluetooth chips are connected through hardware, so that the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, the interference caused by wireless transmission signals among the Bluetooth chips when the production lines are more and the testing devices are more is reduced, and meanwhile, the modulation frequency of the Bluetooth radio frequency signals of the tested equipment is directly obtained, and the turning calculation through the data packet is reduced, so that the obtained data is more accurate.
Example 4
Embodiments of the present invention provide a computer readable storage medium storing a non-transitory software program, a non-transitory computer executable program, and modules, such as program instructions/modules corresponding to the methods in the method embodiments described above. The MCU executes various functional applications and data processing of the MCU by running non-transitory software programs, instructions and modules, i.e. the method in the above-described method embodiments is implemented.
It will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer program for instructing relevant hardware, and the implemented program may be stored in a computer readable storage medium, and the program may include the steps of the embodiments of the above-described methods when executed. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (8)
1. A testing device for bluetooth radio frequency signal frequency offset, the testing device comprising:
the MCU is connected with a Bluetooth modulation clock output pin of a Bluetooth chip in the tested device, and is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested device and calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device;
the serial port, one end connects MCU, another end connects the upper computer, is used for sending the frequency offset value that the said MCU calculates to the upper computer, the upper computer sends the value of the preset modulation frequency to MCU;
and the crystal oscillator is connected with the MCU and used for providing a reference for measuring the modulation frequency of the Bluetooth radio frequency signal of the tested equipment.
2. The device for testing the frequency offset of the Bluetooth radio frequency signal according to claim 1, wherein the crystal oscillator is a high-precision crystal oscillator, and the error is +/-20 PPM.
3. The method for testing the frequency offset of the Bluetooth radio frequency signal is characterized by being applied to the MCU in the device for testing the frequency offset of the Bluetooth radio frequency signal according to claim 1 or 2, and comprises the following steps:
acquiring the modulation frequency of a Bluetooth radio frequency signal of the tested equipment based on the crystal oscillator frequency of the testing device;
and calculating the frequency offset value of the Bluetooth radio frequency signal of the tested equipment by taking the preset modulation frequency value as a reference.
4. The method for testing the frequency offset of the bluetooth radio frequency signal according to claim 3, wherein the calculating the frequency offset value of the bluetooth radio frequency signal of the tested device comprises:
subtracting a preset modulation frequency value from the modulation frequency of the Bluetooth radio frequency signal, and taking an absolute value as a frequency offset value of the Bluetooth radio frequency signal of the tested device by the obtained result, wherein the preset modulation frequency value is input by an upper computer through a serial port.
5. The method for testing the frequency offset of a bluetooth radio frequency signal according to claim 4, further comprising:
and judging whether the tested equipment is qualified or not by comparing the frequency offset value with a preset frequency offset range.
6. The method for testing frequency offset of bluetooth radio frequency signals according to claim 5, wherein the judging criteria for judging whether the tested device is qualified is:
if the frequency offset value exceeds the preset frequency offset range, outputting 0, and representing that the tested equipment is unqualified;
if the frequency offset value does not exceed the preset frequency offset range, outputting '1', and representing that the tested equipment is qualified.
7. A system for testing frequency offset of a bluetooth radio frequency signal, the system comprising:
the acquisition module is used for acquiring the modulation frequency of the Bluetooth radio frequency signal of the tested equipment based on the crystal oscillator frequency of the testing device;
the calculating module is used for calculating the frequency offset value of the Bluetooth radio frequency signal of the tested device by taking the preset modulation frequency value as a reference.
8. A computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 3-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310480164.8A CN116436496A (en) | 2023-04-28 | 2023-04-28 | Bluetooth radio frequency signal frequency offset testing device, method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310480164.8A CN116436496A (en) | 2023-04-28 | 2023-04-28 | Bluetooth radio frequency signal frequency offset testing device, method and system |
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| CN116436496A true CN116436496A (en) | 2023-07-14 |
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| CN202310480164.8A Pending CN116436496A (en) | 2023-04-28 | 2023-04-28 | Bluetooth radio frequency signal frequency offset testing device, method and system |
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- 2023-04-28 CN CN202310480164.8A patent/CN116436496A/en active Pending
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