A power calibration method, calibration equipment and calibration system for wireless module

Abstract

The present application discloses a power calibration method, which includes: selecting a frequency point as a characteristic frequency point from the working frequency band of the target wireless module, calibrating the power transmission parameters of the wireless module at the characteristic frequency point based on the first current transmission power of the wireless module at the characteristic frequency point, and using the power transmission parameters of the wireless module at the characteristic frequency point to calibrate the power transmission parameters of the wireless module at other frequency points. In the above manner, the present application can improve the calibration time of the wireless module, thereby improving the production efficiency of the wireless module.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a power calibration method, calibration equipment and calibration system for a wireless module. Background Art

[0002] Due to the differences in chips, materials, boards and mounting processes between wireless modules, there will be some differences in the power response of devices in the same frequency band. In order to ensure the power consistency between the produced devices, it is necessary to calibrate the power of the wireless module on the production line so that the difference between the power sent by the wireless module in the actual working mode and the target power is within the set error range.

[0003] The existing power calibration method requires that the power values ​​of multiple frequency points working in a certain frequency band be measured and calibrated respectively. For example, for Wifi devices working in the ISM frequency band (referring to the working frequency band of 2400-2483.5MHz), if there are a total of 3 channels CH1-CH13, when performing power calibration, CH1, CH7, CH13, that is, channels 1, 7, and 13 are often selected for power measurement to obtain the current transmit power of channels 1, 7, and 13, and power calibration is performed on channels 1, 7, and 13 based on the current transmit power of channels 1, 7, and 13. The existing power calibration method requires that the power of multiple channels be measured and then calibrated respectively, which takes a long time to calibrate, resulting in increased production costs. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a power calibration method, calibration equipment and calibration system for a wireless module, which can quickly calibrate the power of the wireless module.

[0005] To solve the above technical problems, the first aspect of the present application provides a power calibration method for a wireless module, the method comprising: selecting a frequency point as a characteristic frequency point from the working frequency band of the target wireless module; calibrating the power transmission parameters of the target wireless module at the characteristic frequency point based on the first current transmission power of the target wireless module at the characteristic frequency point; and using the power transmission parameters of the characteristic frequency point to calibrate the power transmission parameters of the target wireless module at other frequency points.

[0006] In order to solve the above technical problems, the second aspect of the present application provides a power calibration device, which includes a memory and a processor connected to each other, the memory stores program instructions, and the processor is used to execute the program instructions to implement the power calibration method of the first aspect.

[0007] To solve the above-mentioned technical problems, the third aspect of the present application provides a power calibration system, which includes a power detector and a power calibration device that are interconnected. The power calibration device is the device provided by the second aspect above. In this power calibration system, the power calibration device is communicatively connected to the target wireless module to control the target wireless module to transmit a signal; the power detector is connected to the target wireless module by conduction, and is used to detect the transmission power of the target wireless module and feed back the transmission power to the power calibration device.

[0008] The beneficial effects of the present application are as follows: Different from the prior art, the present application selects a frequency point as a characteristic frequency point from the working frequency band of the target wireless module, calibrates the power transmission parameters of the target wireless module at the characteristic frequency point based on the first current transmission power of the target wireless module at the characteristic frequency point, and then uses the power transmission parameters of the characteristic frequency point to calibrate the power transmission parameters of the target wireless module at other frequency points. This calibration method only requires power measurement of the characteristic frequency point and then calibration of the power transmission parameters, while the power transmission parameters at other frequency points can be directly calibrated using the power transmission parameters of the characteristic frequency point, so the power of the wireless module can be quickly calibrated, significantly reducing the calibration time of the wireless module, thereby improving the production efficiency of the wireless module and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a flow chart of an implementation method of a power calibration method of a wireless module of the present application;

[0010] Figure 2 It is a schematic diagram of a flow chart of an implementation method of obtaining a first response curve in the present application;

[0011] Figure 3 is a second frequency response curve diagram of an implementation mode of a sample wireless module of the present application;

[0012] Figure 4 is a first frequency response curve diagram of an implementation mode of the target wireless module of the present application;

[0013] Figure 5 It is a flowchart of an implementation method of calibrating the power transmission parameters of the target wireless module at other frequency points in the present application;

[0014] Figure 6 yes Figure 5 A schematic flow chart of an implementation method of step S531;

[0015] Figure 7 is a first frequency response curve of another implementation mode of the target wireless module of the present application;

[0016] Figure 8It is a flow chart of another implementation method of the power calibration method of the target wireless module of the present application;

[0017] Fig. 9 It is a schematic diagram of a framework of an implementation method of a wireless module targeted by the present application;

[0018] Fig.10 It is a schematic diagram of a framework of an implementation method of a power calibration device of the present application;

[0019] Fig.11 It is a schematic diagram of the framework of an implementation scheme of the power calibration system of the present application. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that in the embodiments of the present application, there are descriptions involving "first", "second", etc., which are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] The power calibration method, calibration device and calibration system of a wireless module provided by the present application will be described in more detail below in combination with the accompanying drawings and specific embodiments.

[0023] See also Figure 1 , Figure 1 : is a flow chart of an embodiment of a method for power calibration of a wireless module of the present application, the method may include the following steps:

[0024] S110: Select a frequency point from the working frequency band of the target wireless module as a characteristic frequency point.

[0025] Specifically, the selection strategy of the characteristic frequency point can be determined according to the actual situation. In some embodiments, when the target wireless module operates in a certain frequency band, a first frequency response curve of the target wireless module can be made based on different frequency points in the frequency band and the power values ​​of each frequency point, and a frequency point is selected as the characteristic frequency point in the first frequency response curve. The characteristic frequency point can be selected from the frequency point with a preset change trend in the first frequency response curve. The specific preset change trend can be determined according to the actual situation and is not limited here.

[0026] In one embodiment, the characteristic frequency point may be a frequency point corresponding to a sharp mutation position in the first frequency response curve. The sharp mutation position is the turning point between the increasing phase and the decreasing phase in the first frequency response curve, such as Figure 7 The turning point A where the increasing phase turns into the decreasing phase and the turning point B where the decreasing phase turns into the increasing phase are shown. Further, the sharp mutation position can be further defined as the turning point where the slope of the increasing and / or decreasing phase is greater than the preset slope value among all the above turning points.

[0027] In another embodiment, the characteristic frequency point may be a frequency point at a position having symmetric characteristics in the first frequency response curve. The position having symmetric characteristics may be understood as two line segments extending from the position having symmetric characteristics to the left and right sides in the first frequency response curve respectively being symmetrical about an axis passing through the position having symmetric characteristics.

[0028] S120: Calibrate a power transmission parameter of the target wireless module at the characteristic frequency point based on a first current transmission power of the target wireless module at the characteristic frequency point.

[0029] The power transmission parameter is used to determine the transmission power of the wireless module, wherein different power transmission parameters correspond to different transmission powers. In one embodiment, the power transmission parameter is represented by an Index value, and the transmission power of the target wireless module is corrected by adjusting the Index value. For example, in a certain platform, an Index value represents a power change of 0.25dB. If the power change to be adjusted is 1dB, the power transmission parameter needs to be adjusted by 4 Index values.

[0030] In one embodiment, the correspondence between the transmission power and the power transmission parameter can be preset. After the first current transmission power of the target wireless module at the characteristic frequency point is measured, the first power difference between the first current transmission power and the target power is calculated. According to the preset correspondence, the power transmission parameter for calibrating the transmission power of the target wireless module at the characteristic frequency point can be obtained. For example, the target power of the target wireless module at the characteristic frequency point is 16dBm, and the corresponding original power transmission parameter is Index0. An Index value is preset to represent the power change of 0.25dB. If the first current transmission power is measured to be 15.5dBm, and the first power difference is calculated to be 0.5dB, then the power transmission parameter corresponding to the first power difference is 2 Index values, and the power transmission parameter of the calibrated characteristic frequency point is Index0-2. The above target power can be preset and determined. Generally, wireless modules produced by the same production platform or wireless modules of the same model have the same target power value. For example, a platform requires the target power to be 16dBm in 11B (a wireless LAN standard) working mode, and the target power of the wireless modules on the subsequent related production line is 16dBm. In addition, the target power of each working frequency of the wireless module can be the same. In this case, the power calibration of each frequency of the wireless module on the related production line is performed around this target power value.

[0031] S130: Using the power transmission parameters of the characteristic frequency point, calibrate the power transmission parameters of the target wireless module at other frequency points.

[0032] In this embodiment, the power transmission parameter compensation value between other frequency points and the characteristic frequency point of the target wireless module can be predetermined, that is, the difference between the power transmission parameters of other frequency points and the power transmission parameters of the characteristic frequency point. After obtaining the power transmission parameters of the characteristic frequency point, the power transmission parameters of the target wireless module at other frequency points can be obtained by using the power transmission parameters of the characteristic frequency point and the corresponding power transmission parameter compensation value.

[0033] Please refer to Figure 2-4 , Figure 2 is a schematic diagram of a process for obtaining a first response curve in one embodiment of the present application, Figure 3 is a second frequency response curve diagram of a sample wireless module in one embodiment of the present application, Figure 4 It is a first frequency response curve diagram of a target wireless module in one embodiment of the present application.

[0034] In one embodiment, during the execution of S110, a first frequency response curve of the target wireless module may be determined first, and based on the first frequency response curve, a frequency point may be selected from the working frequency band of the target wireless module as a characteristic frequency point. The specific steps of determining the first frequency response curve may include:

[0035] S211: Control at least one sample wireless module to transmit a first test signal at each frequency point in the working frequency band, and obtain the transmission power corresponding to each sample wireless module at each frequency point obtained by scanning the first test signal.

[0036] In this embodiment, a wireless module of the same model produced in the same production batch as the target wireless module can be selected as a sample wireless module. Of course, the production batch may not be limited, as long as the model is the same as the target wireless module. At least one sample wireless module can be randomly selected from the sample wireless modules, and the sample wireless module is controlled to send the first test signal of all channels. The first test signal is a sub-signal of each channel of the working frequency band of the sample wireless module. Each signal passes through each corresponding frequency point of the working frequency band of the sample wireless module, and the power value of each signal at each corresponding frequency point is detected. Specifically, in one embodiment, the sample wireless module is a Wifi module, and the sample wireless module works in the ISM frequency band (referring to the working frequency band at 2400-2483.5MHz). The radio frequency unit of the sample wireless module is controlled to transmit a single tone, that is, a Singletone form, and transmits signals of different frequencies to each channel of the working frequency band of the sample wireless module. Each signal passes through each corresponding frequency point of the working frequency band of the sample wireless module, and obtains the transmission power corresponding to each sample wireless module at each frequency point obtained by scanning each signal.

[0037] Specifically, in one embodiment, taking the Wifi module working in the ISM frequency band as an example, the Wifi module has a total of 13 channels in the ISM frequency band, and the sample wireless module is controlled to transmit a signal with different frequencies to each channel respectively. The frequency of the signal in channel 1 is 2412MHz, and the frequency in channel 2 is 2417MHz. From channel 1 to channel 13, the signal frequency increases every 5MHz, and the frequency in channel 13 is 2472MHz, and the actual power value of the Wifi module in CH1, CH2, ... CH13 is obtained. It can be understood that in other embodiments, the channel frequency can also increase or decrease every 2MHz or 3MHz, which is not limited here.

[0038] S212: Based on the transmission power of each frequency point corresponding to each sample wireless module, generate a second frequency response curve representing the transmission power of each frequency point corresponding to each sample wireless module.

[0039] After obtaining the transmission power corresponding to each frequency point of each sample wireless module, a coordinate system is established, in which the horizontal axis is all the frequency points of each sample wireless module, and the vertical axis is the transmission power corresponding to each frequency point of each sample wireless module. For each sample wireless module, the transmission power of each frequency point of the sample wireless module is found in the coordinate system and the found points are connected. The obtained curve is the second frequency response curve of the transmission power corresponding to each frequency point of the sample wireless module.

[0040] S213: Obtain a first frequency response curve by using the second frequency response curve of each sample wireless module.

[0041] The frequency response characteristics of the sample wireless modules on the same platform are generally consistent, and slight data differences can be obtained by fitting and averaging the samples to obtain the final frequency response curve. Therefore, the transmission power corresponding to each frequency point in the second frequency response curves of multiple sample wireless modules can be averaged to obtain a new point, and the new point is connected with a line to obtain the first frequency response curve. Of course, in other embodiments, the second frequency response curve of a sample wireless module located in the middle position of the second frequency response curves of each sample wireless module can also be used as the first frequency response curve, so there is no specific limitation on how to use the second frequency response curve to obtain the first frequency response curve.

[0042] Please continue reading Figure 3 and Figure 4 In one embodiment, three sample wireless modules are randomly selected for testing, and the three sample wireless modules are named as sample 1, sample 2, and sample 3. The three sample modules are respectively controlled to transmit first signals of different frequencies to each channel in the working frequency band. The first signals pass through the corresponding frequency points of the working frequency band of the sample modules respectively, and the power values ​​of the first signals of different frequencies transmitted by the three sample modules after passing through the corresponding frequency points are obtained. A coordinate system is established, and the power values ​​are represented by points in the coordinate system. The points representing the power values ​​of the three sample modules are respectively connected to obtain the second frequency response curves of the three sample modules. The second frequency response curves of the three sample modules are fitted to obtain the first frequency response curve. It can be understood that in other embodiments, four or more sample wireless modules can also be selected for testing to obtain the second frequency response curve, and the four or more second frequency response curves are fitted to obtain the first frequency response curve. The number of the selected sample wireless modules is not limited here.

[0043] Since the frequency response characteristics of sample wireless modules on the same platform are generally consistent, when calibrating the target wireless module on the production line, the first frequency response curve obtained through data fitting can be used as the frequency response curve of the target wireless module.

[0044] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic diagram of a flow chart of calibrating the power transmission parameters of the target wireless module at other frequency points in an embodiment of the present application, Figure 6 yes Figure 5 A flowchart of an implementation method of step S131 in FIG.

[0045] In this implementation, the above step S130 may specifically include:

[0046] S531: Determine a power transmission parameter compensation value between other frequency points and the characteristic frequency point.

[0047] The power transmission parameter compensation value is the difference between the power transmission parameters of the target wireless module at other frequency points and the power transmission parameters of the target wireless module at the characteristic frequency point. The power transmission parameter compensation value can be determined by manual input, or determined by a power calibration device according to the power relationship of each frequency point of the target wireless module, such as the power relationship of the frequency points on the first frequency response curve of the target wireless module.

[0048] In this embodiment, step S531 may include the following sub-steps:

[0049] S531a: Obtain a second power difference between other frequency points and the characteristic frequency point on the first frequency response curve of the target wireless module.

[0050] After obtaining the first frequency response curve of the target wireless module through the above method, the transmission power of the target wireless module at each frequency point can be obtained from the curve, and the difference between the transmission power of the target wireless module at other frequency points and the transmission power of the characteristic frequency point is calculated. This difference is the second power difference.

[0051] S531b: Determine the power transmission parameter compensation values ​​corresponding to other frequency points by using the second power difference values ​​corresponding to other frequency points.

[0052] The power transmission parameter compensation value is the difference between the power transmission parameter of the target wireless module at other frequencies and the power transmission parameter of the target wireless module at the characteristic frequency. After obtaining the second power difference corresponding to the other frequencies, the power transmission parameter compensation value corresponding to the second power difference can be determined according to the corresponding relationship between the power transmission parameter and the transmission power.

[0053] S532: Determine the power transmission parameters of the target wireless module at other frequency points by using the power transmission parameter compensation values ​​corresponding to other frequency points and the power transmission parameters of the characteristic frequency points.

[0054] In this embodiment, the power transmission parameter of the target wireless module at other frequency points is the sum of the power transmission parameter compensation value corresponding to the other frequency points and the power transmission parameter of the characteristic frequency point.

[0055] See also Figure 7 , Figure 7 It is the first frequency response curve of another embodiment of the target wireless module of the present application. Specifically, in one embodiment, the power transmission parameter is represented by an Index value, and the working platform of the target wireless module to be calibrated includes 13 working channels (i.e., the working frequency of the target wireless module). In this platform, an Index value represents a power change of 0.25 dB. After data fitting, the frequency response curve of the target wireless module is obtained, such as Figure 7 As shown in the figure, frequency 6 is selected as the characteristic frequency, and the corresponding transmit power of frequency 6 is 15.25dBm. At this time, the corresponding Index value of the target wireless module is 17. Assume that the target power to be calibrated is 16.00dBm. The difference between the target power to be calibrated and the current transmit power of the target wireless module at frequency 6 is 0.75dB. Since an Index value represents a power change of 0.25dB, the corresponding Index value should be increased by 3 values. Therefore, the Index value of the target wireless module needs to be calibrated to 20 to make the transmit power of the target wireless module at frequency 6 16.00dBm.

[0056] When calibrating the transmit power of other frequencies, it is necessary to calculate the power transmission parameter compensation values ​​corresponding to other frequencies, as well as the transmit power difference between the target wireless module at other frequencies and the characteristic frequency. Specifically, from the frequency response curve of the target wireless module, it can be obtained that the transmit power corresponding to the target wireless module at frequency 4 is 15.75dBm, and the difference in transmit power between frequency 4 and frequency 6 when not calibrated is 0.50dB. Since an Index value represents a power change of 0.25dB, it can be known that the difference between the power transmission parameter of frequency 4 and the power transmission parameter of frequency 6 is 2, that is, the difference between the Index value of frequency 4 and the Index value of frequency 6 is 2, and this difference is the power transmission parameter compensation value corresponding to frequency 4. When calibrating the transmission power of the target wireless module at frequency 4, the power transmission parameter of the target wireless module at frequency 4 is calibrated. The power transmission parameter of frequency 4 is the sum of the power transmission parameter compensation value corresponding to frequency 4 and the power transmission parameter of the characteristic frequency. In this embodiment, the parameter of the power transmission parameter of the target wireless module at frequency 4 is 22.

[0057] See also Figure 8 , Figure 8 FIG. 5 is a flow chart of another embodiment of the power calibration method of the target wireless module of the present application. After executing step S130, the power calibration method of the target wireless module further includes:

[0058] S840: Write the power transmission parameters of the characteristic frequency point and other frequency points into the non-volatile memory of the target wireless module.

[0059] Among them, the power transmission parameters of each frequency point stored in the non-volatile memory are used to determine the subsequent transmission power of the target wireless module at the corresponding frequency point. In one embodiment, the power transmission parameters of the characteristic frequency point and each other frequency point obtained after calibration are written into a specific area in the non-volatile memory of the target wireless module. When the target wireless module is subsequently applied, the power transmission parameters in a specific mode are directly called from the specific area in the non-volatile memory of the target wireless module. At this time, the transmission power of the target wireless module at each frequency point is the power corresponding to the power transmission parameters of each frequency point after calibration.

[0060] Please refer to Fig. 9 , Fig. 9 It is a schematic diagram of the framework of an implementation method of the target wireless module of the present application. The target wireless module 90 includes: a radio frequency transceiver unit 91, a non-volatile memory 92, a power supply unit 93, etc., wherein the radio frequency transceiver unit 91 is used to receive the control instructions provided by the power calibration device and transmit signals; the non-volatile memory 92 is used to store the power transmission parameters of the target wireless module 90 after calibration at each frequency point, and the power transmission parameters of each frequency point stored in the non-volatile memory 92 are used to determine the subsequent transmission power of the target wireless module 90 corresponding to each frequency point. The non-volatile memory 92 can specifically be a read-only memory (ROM, Read-Only Memory) or a flash memory (Flash memory).

[0061] S850: Control the target wireless module to transmit a second test signal at each frequency point in the working frequency band, and obtain a second current transmit power corresponding to each frequency point obtained based on a test of the second test signal corresponding to each frequency point.

[0062] In this embodiment, the power of the second test signal at each frequency point in the working frequency band transmitted by the target wireless module is theoretically the power corresponding to the power transmission parameter of each frequency point after calibration.

[0063] S860: Determine whether a difference between the second current transmission power of each frequency point and the target power of the target wireless module is less than a preset value.

[0064] S870: If the differences corresponding to each frequency point are all smaller than a preset value, it is determined that the calibration of the target wireless module is successful.

[0065] In one embodiment, the calibrated power transmission parameters of each frequency point are stored in a specific area of ​​the non-volatile memory of the target wireless module, the target wireless module calls the calibrated power transmission parameters of each frequency point, and transmits the second test signal of each frequency point based on the calibrated power transmission parameters of each frequency point; the second current transmission power corresponding to each frequency point obtained by the test based on the second test signal corresponding to each frequency point is obtained, and the difference between the second current transmission power of each frequency point and the target power of the target wireless module is compared to see whether it is less than a preset value. If the differences corresponding to each frequency point are all less than the preset value, it is determined that the calibration of the target wireless module is successful. If there is a difference corresponding to a certain frequency point that is greater than the preset value, the target wireless module is marked as a defective product, and the target wireless module is calibrated again. Among them, the difference between the second current transmission power of each frequency point and the target power of the target wireless module is the absolute value of the difference between the second current transmission power of each frequency point and the target power of the target wireless module.

[0066] Specifically, in one embodiment, the preset value is 0.5dB, that is, the difference between the second current transmission power of each frequency point and the target power of the target wireless module is within the range of 0.5dB, then the calibration of the target wireless module is determined to be successful; if there is a difference between the second current transmission power of a certain frequency point and the target power of the target wireless module that is greater than the range of 0.5dB, the target wireless module is calibrated as a defective product.

[0067] See also Fig.10 , Fig.10 1 is a schematic diagram of a framework of an embodiment of a power calibration device of the present application. The power calibration device 100 includes a memory 102 and a processor 101 coupled to each other, the memory 102 stores program instructions, and the processor 101 is used to execute the program instructions to implement the steps in any of the above power calibration method embodiments. In one embodiment, the power calibration device 100 is a host computer, and the host computer includes a memory 102 and a processor 101 coupled to each other.

[0068] Specifically, the processor 101 is used to control the memory 102 and itself to implement the steps in the above-mentioned power calibration method embodiment applied to the target wireless module 90. The processor 101 can also be called a CPU (Central Processing Unit). The processor 101 may be an integrated circuit chip with signal processing capabilities. The processor 101 can also be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. In addition, the processor 101 can be implemented by multiple integrated circuit chips.

[0069] In the above embodiment, the processor 101 is used to analyze the transmission power of the target wireless module 90 to obtain an analysis result; wherein the analysis result includes determining the difference between the current transmission power of the target wireless module 90 and the target power to be calibrated, and determining whether the difference is within a preset range. If the difference is greater than the preset range, the processor 101 adjusts the power transmission parameters of the target wireless module 90 based on the size of the difference, and writes the calibrated power transmission parameters to the non-volatile memory 92 of the target wireless module 90.

[0070] See also Fig.11 , Fig.11 The system of this embodiment can execute the steps in the above method. For detailed description of the relevant contents, please refer to the above method part, which will not be repeated here.

[0071] The power calibration system 110 includes a power detector 80 and a power calibration device 100 connected to each other. The power detector 80 is used to connect to the target wireless module 90 by conduction, to detect the transmission power of the target wireless module 90, and to feed back the transmission power to the power calibration device 100; the power calibration device 100 is the device described in the previous embodiment, and the power calibration device 100 is used to communicate with the target wireless module 90 to control the target wireless module 90 to transmit a signal.

[0072] Specifically, in one embodiment, the power detector 80 is a wireless comprehensive tester, and the target wireless module 90 transmits a signal controlled by the power calibration device 100. The control instructions of the power calibration device 100 are sent to the target wireless module 90 through the serial port. The target wireless module 90 contains a radio frequency test point. The radio frequency test point on the target wireless module 90 is connected to the power detector 80 in a conductive manner through a test socket and a radio frequency cable. The power detector 80 tests the power of the signal currently transmitted by the target wireless module 90, and reports the test result to the power calibration device 100 via Ethernet or serial port wired transmission.

[0073] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power calibration method for a wireless module, characterized in that: The method comprises: Obtaining a first frequency response curve of a target wireless module; Based on the first frequency response curve, selecting a frequency point from the working frequency band of the target wireless module as a characteristic frequency point; Based on a first current transmit power of the target wireless module at the characteristic frequency point, calibrating a power transmit parameter of the target wireless module at the characteristic frequency point; Acquire a second power difference between each other frequency point on the first frequency response curve of the target wireless module and the characteristic frequency point; Determine the power transmission parameter compensation value corresponding to each of the other frequency points by using the second power difference corresponding to each of the other frequency points and the correspondence between the power transmission parameter and the transmission power; The power transmission parameter of the target wireless module at each of the other frequency points is determined by using the power transmission parameter compensation value corresponding to each of the other frequency points and the power transmission parameter of the characteristic frequency point.

2. The power calibration method according to claim 1, characterized in that: The characteristic frequency point is a frequency point corresponding to a position with a sharp mutation or a symmetrical characteristic in the first frequency response curve; And / or, obtaining a first frequency response curve of the target wireless module includes: Controlling at least one sample wireless module to transmit a first test signal at each frequency point of the working frequency band, and obtaining the transmission power corresponding to each of the sample wireless modules at each frequency point obtained by scanning the first test signal; Based on the transmission power corresponding to each frequency point corresponding to each of the sample wireless modules, generating a second frequency response curve representing the transmission power corresponding to each frequency point of each of the sample wireless modules; The first frequency response curve is obtained by using the second frequency response curve of each of the sample wireless modules.

3. The power calibration method according to claim 1, characterized in that: The calibrating the power transmission parameter of the target wireless module at the characteristic frequency point based on the first current transmission power of the target wireless module at the characteristic frequency point includes: Acquire a first power difference between the first current transmit power and a target power of the target wireless module; Based on the first power difference, a power transmission parameter of the target wireless module at the characteristic frequency point is obtained.

4. The power calibration method according to claim 1, characterized in that: The method further comprises: The power transmission parameters of the characteristic frequency point and each of the other frequency points are written into the non-volatile memory of the target wireless module, wherein the power transmission parameters of each frequency point stored in the non-volatile memory are used to determine the subsequent transmission power of the target wireless module corresponding to each of the frequency points.

5. The power calibration method according to claim 4, characterized in that: After writing the power transmission parameters of the characteristic frequency point and each of the other frequency points into the non-volatile memory of the target wireless module, the method further includes: Controlling the target wireless module to transmit a second test signal at each frequency point in the working frequency band, and obtaining a second current transmit power corresponding to each frequency point obtained based on a test of the second test signal corresponding to each frequency point; Determine whether a difference between the second current transmit power of each of the frequencies and the target power of the target wireless module is less than a preset value; If the differences corresponding to the frequency points are all smaller than the preset values, it is determined that the calibration of the target wireless module is successful.

6. A power calibration device, characterized in that: The device comprises a memory and a processor connected to each other, wherein: The memory is used to store program instructions; The processor is used to execute the program instructions to implement the power calibration method as described in any one of claims 1-5.

7. A power calibration system, characterized in that: The system comprises a power detector and a power calibration device connected to each other, wherein: The power calibration device is the device according to claim 6, and is used to communicate with the target wireless module to control the target wireless module to transmit a signal; The power detector is used to be connected to the target wireless module by conduction, to detect the transmission power of the target wireless module, and to feed back the transmission power to the power calibration device.

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