Output power multi-gear automatic calibration method, device, equipment and medium

Abstract

The present invention discloses a method, device, equipment and medium for automatic calibration of multiple output power levels. The method realizes automatic calibration of power amplification equipment through a calibration system. The present invention uses a digital control attenuator to control the radio frequency output power, and combines the power amplifier test platform software, hardware platform, SCPI programmable instrument standard instructions and a custom communication protocol to achieve closed-loop calibration of multiple power levels, significantly improving the efficiency and accuracy of calibration.

Description

Technical Field

[0001] The present invention belongs to the technical field of array amplifier calibration, and particularly relates to a method, device, equipment and medium for automatic calibration of multi-gear output power. Background Art

[0002] With the steady development of communication, radar, electronic countermeasure and other fields in military and civilian applications, high-frequency high-power transmitting devices have been successfully applied to various fields such as radar, guidance and aerospace. As the core component of the transmitting device, the accuracy of the output power of the solid-state power amplifier directly affects its performance, and thus affects the entire system.

[0003] Currently, there are increasingly high requirements for power control and output power of radio frequency systems, which requires radio frequency power amplifiers to gradually operate in the non-linear region or even the saturation region. However, due to factors such as inconsistent device parameters, different input excitation powers, and inconsistent amplitude-frequency response curves of digital control attenuators, the control of the output power of the power amplifier shows a non-linear relationship. Therefore, it is necessary to calibrate the output power of each system level by level.

[0004] Traditional calibration uses hardware equalization or manual mode. In this mode, the former cannot meet the multi-gear power control, and for the latter, the calibration personnel need to continuously modify the set value of the digital control attenuator, and at the same time record the power meter display and the set attenuation value of the digital control attenuator. This method is not only greatly affected by the subjective factors of the calibration personnel, but also when the power amplifier has a wide frequency band and a large gain flatness band, the calibration accuracy is often not guaranteed. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, device, equipment and medium for automatic calibration of multi-gear output power to overcome the defects of the prior art. By using a digital control attenuator to control the radio frequency output power, and combining the power amplifier test platform software, hardware platform, SCPI programmable instrument standard instructions and custom communication protocols to achieve multi-gear power closed-loop calibration, the calibration efficiency and accuracy are significantly improved.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] An output power multi-gear automatic calibration method. The method realizes the automatic calibration of a power amplification device through a calibration system. The system includes a test host, which contains a test platform and calibration software. The test platform is respectively communicatively connected to a power meter, a signal source, and the calibration software. The radio frequency power control module is respectively communicatively connected to the calibration software, the signal source, and the power meter. The radio frequency power control module is used to control the radio frequency output power and store calibration information. The radio frequency power control module includes a digital control attenuator. The test platform is used to control the signal source to set the calibration frequency step and provide an excitation signal, and at the same time control the power meter to read the output power of the current power amplifier. The calibration software is used to control the test platform and send a set attenuation command to the radio frequency power control module at the same time. The method includes:

[0008] S100: Set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital control attenuator;

[0009] S200: In response to the received calibration instruction, set the digital control attenuator at a frequency point. The value of the digital control attenuator starts from the initial value and goes to the maximum attenuation according to the attenuation step;

[0010] S300: After each digital control attenuation setting is completed, the calibration software sends a read command to the test platform. After the test platform finishes reading, it uploads the read data to the calibration software. Only after the calibration software receives the read data does it start to set the next attenuation value;

[0011] S400: After all attenuation values at a frequency point are set, it will be restored to the set initial value, and at the same time, a command for the next frequency point will be sent to the test platform, and then steps S200 - S400 are repeated until all frequency points are scanned;

[0012] S500: The calibration software reads the gear information to be calibrated and finds all the power values closest to the target gear at a frequency point, then finds the minimum error value and temporarily stores the data set of this frequency point in the calibration data;

[0013] S600: Generate a calibration document after all gears are calibrated.

[0014] Furthermore, the power meter includes a programmable power meter for reading the output power, and the signal source includes a programmable signal source for providing an excitation input to the entire calibration system. Before step S100, the method further includes selecting appropriate programmable power meters and programmable signal sources according to the specific implementation environment.

[0015] Further, the test platform is set as a local TCP server, the calibration software is set as a client, the information interaction between the test platform and the calibration software adopts the JSON format, and the calibration attenuation table saved by the calibration software adopts the JSON format.

[0016] Further, the RF power control module further includes an MCU processor, and the internal FLSAH of the MCU processor is used to store the calibration attenuation table.

[0017] Further, the scanned data and gear classification include the excitation frequency, excitation power, power meter reading, actual RF power, forward detection voltage, reverse detection voltage, forward detection power, reverse detection power, and set attenuation value of the current frequency point.

[0018] Further, the calibration document includes a scanned data document, a gear classification document, and a calibration attenuation table document.

[0019] Further, the calibration document can be manually modified.

[0020] On the other hand, the present invention also provides an output power multi-gear automatic calibration device, which is used to implement the method described in claim 1, including:

[0021] A frequency setting module, which is used to execute step S100: set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital control attenuator;

[0022] An attenuation setting module, which is used to execute step S200: in response to the received calibration instruction, set the digital control attenuator at a frequency point, and the value of the digital control attenuator starts from the starting value and steps to the maximum attenuation according to the attenuation step;

[0023] A data uploading module, which is used to execute step S300: after each digital control attenuation setting is completed, the calibration software sends a read command to the test platform, and the test platform uploads the read data to the calibration software after the reading is completed. The calibration software starts to set the next attenuation value only after receiving the read data;

[0024] A frequency point scanning module, which is used to execute step S400: after all attenuation values at a frequency point are set, it will be restored to the set starting value, and at the same time send a command for the next frequency point to the test platform, and then repeat steps S200 - S400 until all frequency points are scanned;

[0025] A minimum error finding module, which is used to execute step S500: the calibration software reads the gear information to be calibrated and finds all power values closest to the target gear at a frequency point, then finds the minimum error value and temporarily stores the data set of this frequency point in the calibration data;

[0026] A document generation module, configured to execute step S600: generate a scan data document, a gear classification document, and a calibration attenuation table document after all gear calibrations are completed.

[0027] On the other hand, the present invention also provides a computer device, which includes a processor and a memory. A computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement any one of the above output power multi-gear automatic calibration methods.

[0028] On the other hand, the present invention also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement any one of the above output power multi-gear automatic calibration methods.

[0029] The beneficial effects of the present invention are as follows:

[0030] (1) The output power multi-gear automatic calibration method, device, equipment, and medium provided by the present invention only need to provide frequency and gear information to achieve closed-loop calibration of radio frequency output power.

[0031] (2) The output power multi-gear automatic calibration method, device, equipment, and medium provided by the present invention have a fine frequency step, and the power flatness of multiple gears is close to the ±1.0 dB level, exceeding or equaling the existing power calibration methods, and greatly improving the system calibration efficiency.

[0032] (3) The present invention can manually modify the documents generated by calibration according to the actual situation without re-calibrating and re-generating the calibration data file, significantly reducing the calibration time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic flowchart of the output power multi-gear automatic calibration method provided by the present invention;

[0034] Figure 2 is a block diagram of the software and hardware connection of the present invention;

[0035] Figure 3 is a flowchart of the automatic calibration control of the present invention;

[0036] Figure 4 is a flowchart of the automatic calibration power search and matching of the present invention;

[0037] Figure 5 is a power curve diagram after calibrating four sample gears randomly selected from a 200W product in an embodiment of the present invention;

[0038] Figure 6 is a block diagram of the structure of the output power multi-gear automatic calibration device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following specific examples illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0040] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0041] Traditional calibration adopts hardware equalization or manual mode. In this mode, the former cannot meet the multi-gear power control, and for the latter, the calibration personnel need to continuously modify the set value of the digital controlled attenuator, and at the same time record the power meter display and the attenuation value of the set digital controlled attenuator. This method is not only greatly affected by the subjective factors of the calibration personnel, but also when the power amplifier has a wide frequency band and a large gain flatness band, the accuracy of calibration often cannot be guaranteed.

[0042] To solve the above technical problems, the following various embodiments of a method, device, equipment and medium for multi-gear automatic calibration of output power according to the present invention are proposed.

[0043] Embodiment 1

[0044] This embodiment uses a digital controlled attenuator to control the RF output power, combines a hardware platform such as a power amplifier automated test platform software (including a programmable power meter, a programmable signal source) RS422 - 485 / RJ45, and combines the SCPI programmable instrument standard instruction and a custom communication protocol to provide a multi-gear power closed-loop calibration method, which significantly improves the calibration efficiency and accuracy.

[0045] Specifically, the method provided in this embodiment consists of an automatic test platform, automatic calibration software, and a radio frequency power control module. The automatic test platform is used to control the signal source to set the calibration frequency step, provide an excitation signal, and at the same time control the power meter to read the output power of the current power amplifier. As a local server, it sends calibration data and relevant configuration information to the automatic calibration software. The automatic calibration software is used to control the automatic test platform software and send a set attenuation command to the radio frequency power control module to achieve different power outputs. After calibration is completed, it will also generate a calibration data file and an Excel spreadsheet file for subsequent data processing and data storage. The radio frequency power control module is used to set the digital controlled attenuator and store calibration data. Finally, by applying the automation platform software and data acquisition, etc., it achieves rapid calibration of power and setting the attenuation value of the digital controlled attenuator, and realizes the calibration of array amplification or single-channel amplification.

[0046] In this embodiment, the automatic test platform and the automatic calibration software communicate in the form of a local server and a client, the information interaction adopts the JSON format, and the calibration attenuation table saved by the automatic calibration software adopts the JSON format.

[0047] In this embodiment, the radio frequency control module includes an MCU processor and a digital controlled attenuator. The internal FLSAH of the MCU processor is used to store the attenuation table, and the digital controlled attenuator is controlled in parallel.

[0048] This embodiment adopts a step of 25 MHz and power levels of 10 W, 50 W, and 200 W.

[0049] Refer to Figure 1 and 2 As Figure 1 shown is the schematic diagram of the process of the multi-level automatic calibration method for output power provided in this embodiment. As Figure 2 shown is the block diagram of the software and hardware connection of this embodiment. Based on this implementation environment, the method specifically includes the following steps:

[0050] Before the specific calibration, it includes preliminary steps:

[0051] S0: Select a programmable signal source to provide excitation input to the entire calibration system; a programmable power meter to read the output power; the automatic test platform and the automatic calibration software achieve information interaction through local communication; the radio frequency power control module is used to control the radio frequency output power and store calibration information.

[0052] S1: Based on the appropriate frequency step and power level information selected in step S0, initialize the internal default attenuation table of the radio frequency power control module, which includes three pieces of information: frequency, power level, and attenuation value, and store it in its FLSAH memory. Therefore, it is necessary to select an appropriate attenuation step according to actual requirements.

[0053] S2: Based on step S0, design the overall architecture of the software system. Set the automatic test platform as the local TCP server and the automatic calibration software as the client to achieve the communication linkage between the automatic test platform and the automatic calibration software.

[0054] S3: Based on steps S0, S1, and S2, design the communication protocols between the automatic test platform and the automatic calibration software, and between the automatic calibration software and the RF power control module. Select a suitable digital controlled attenuator according to the attenuation step in step S1 and write the relevant driver.

[0055] After the pre - steps are completed, start the calibration. Refer to Figure 3 and Figure 4 As Figure 3 shown is the automatic calibration control flowchart of this embodiment, and as Figure 4 shown is the automatic calibration power search and matching flowchart of this embodiment.

[0056] S100: Set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital controlled attenuator.

[0057] Specifically, through the automatic platform, set the calibration frequency range, frequency step, and at the same time set the maximum attenuation and attenuation step of the digital controlled attenuator, and then start the calibration, ensuring that the automatic calibration software is opened and connected to the automatic test platform.

[0058] S200: In response to the received calibration instruction, set the digital controlled attenuator at a frequency point, and the value of the digital controlled attenuator starts from the starting value and goes to the maximum attenuation according to the attenuation step.

[0059] Specifically, after the automatic calibration software receives the start calibration command, at a frequency point, it will set the digital controlled attenuator, whose value starts from 0.00 dB, according to the set step (0.25 dB in this embodiment), and ends at the set maximum value.

[0060] S300: After each digital controlled attenuation setting is completed, the calibration software sends a read command to the test platform. After the test platform finishes reading, it uploads the read data to the calibration software, and the calibration software starts to set the next attenuation value only after receiving the read data.

[0061] Before setting the next attenuation value, it is necessary to wait for the current attenuation setting to be completed, and receiving the data can determine that this attenuation setting is completed.

[0062] S400: After all attenuation values at a frequency point are set, it will be restored to the set starting value, and at the same time, a command for the next frequency point will be sent to the test platform, and then repeat steps S200 - S400 until all frequency points are scanned.

[0063] S500: The calibration software reads the grading information to be calibrated and searches for all power values closest to the target grade at a frequency point. In this embodiment, the grading is 10W, 50W, and 200W. Then, it finds the minimum error value and temporarily stores the data set at this frequency point in the calibration data. Taking 100W as an example, 100W converted to logarithmic measurement is 50.00dBm. Denote the power of each scan as Pi, and the error value △Pi = |50.00 - Pi|. Then, find the minimum error value △Pmin and temporarily store the data set at this point in the calibration data.

[0064] In this embodiment, the method of finding the minimum error value is to find the only optimal solution. If other methods are used, such as a method that satisfies within the error range, assuming the absolute value of the error ≤ 0.5dBm, then errors of 0.4, -0.3, 0.2, -0.1 all satisfy the case of ≤ 0.5. At this time, there will be multiple values, and they are not necessarily the optimal solutions, making it difficult to obtain the most accurate calibration data.

[0065] S600: After all grades are calibrated, a calibration document is generated.

[0066] Specifically, after all grades are calibrated, an Excel file and a calibration attenuation table file will be generated. The Excel file contains two worksheets. One worksheet is all data, which contains all the scan data. The other worksheet is cal data, which contains the data classified by grade after calibration. The calibration attenuation table file is in a custom format and only contains information such as grade and attenuation value. The frequency follows the previously defined step and is hidden in the number of data. For example, if the starting frequency is 1000MHz and the frequency step is 10MHz, then the first attenuation value is 1000MHz, the second attenuation value is 1010MHz, and the subsequent attenuation values follow this pattern.

[0067] As an implementation method, in the Excel file of this embodiment, it includes Freq (excitation frequency), Pin (excitation power), Pout (power meter reading), TruePout (actual RF power), mv_f (forward detection voltage), mv_r (reverse detection voltage), dBm_f (forward detection power), dBm_r (reverse detection power), and amp_att (set attenuation value) of the current frequency point.

[0068] Refer to Figure 5 , as Figure 5 shown is the power curve graph after calibrating four sample grades randomly selected from the 200W product of this embodiment. Figure 5 are the test data after calibration of the 200W product in the embodiment, reaching within ±1dB. The horizontal axis information is a total of 60 frequency points. Devices 1 to 4 are the data distributions of 4 groups of similar products formed by using the method of the embodiment.

[0069] The output power multi - gear automatic calibration method provided by this embodiment only needs to provide frequency and gear information to achieve closed - loop calibration of RF output power. This method has a fine frequency step, and the power flatness of multiple selectable gears is close to the ±1.0dB level, exceeding or equaling the existing power calibration methods, and significantly improving the system calibration efficiency. This method can manually modify the calibration - generated document according to the actual situation without re - calibrating and re - generating the calibration data file, significantly reducing the calibration time.

[0070] Embodiment 2

[0071] Refer to Figure 6 ,as Figure 6 shown in the block diagram of the output power multi - gear automatic calibration device provided by this embodiment. This device is used to implement the output power multi - gear automatic calibration method provided by the foregoing embodiment. Specifically, this device includes:

[0072] A frequency setting module 10, configured to execute step S100: set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital control attenuator;

[0073] An attenuation setting module 20, configured to execute step S200: in response to the received calibration instruction, set the digital control attenuator at a frequency point, and the value of the digital control attenuator starts from the starting value and steps to the maximum attenuation according to the attenuation step;

[0074] A data uploading module 30, configured to execute step S300: after each digital control attenuation setting is completed, the calibration software sends a read command to the test platform, and the test platform uploads the read data to the calibration software after the reading is completed. Only when the calibration software receives the read data does it start to set the next attenuation value;

[0075] A frequency point scanning module 40, configured to execute step S400: after all attenuation values at a frequency point are set, it will be restored to the set starting value, and at the same time send a command for the next frequency point to the test platform, and then repeat steps S200 - S400 until all frequency points are scanned;

[0076] A minimum error finding module 50, configured to execute step S500: the calibration software reads the gear information to be calibrated and finds all power values closest to the target gear at a frequency point, then finds the minimum error value and temporarily stores the data set of this frequency point in the calibration data;

[0077] A document generating module 60, configured to execute step S600: generate a scan data document, a gear classification document, and a calibration attenuation table document after all gears are calibrated.

[0078] The output power multi - gear automatic calibration device provided by this embodiment only needs to provide frequency and gear information to achieve closed - loop calibration of radio frequency output power. The device has a fine frequency step, multiple selectable gears, and the power flatness is close to the ±1.0 dB level, exceeding or equaling the existing power calibration methods, and significantly improving the system calibration efficiency. The device can manually modify the calibration - generated document according to the actual situation without re - calibrating and re - generating the calibration data file, significantly reducing the calibration time.

[0079] Embodiment 3

[0080] This preferred embodiment provides a computer device. This computer device can implement the steps in any of the embodiments of the output power multi - gear automatic calibration method provided by the embodiments of the present application. Therefore, it can achieve the beneficial effects of the output power multi - gear automatic calibration method provided by the embodiments of the present application. For details, see the previous embodiments and will not be elaborated here.

[0081] Embodiment 4

[0082] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above - mentioned embodiments can be completed by instructions or by controlling related hardware through instructions. These instructions can be stored in a computer - readable storage medium and loaded and executed by a processor. For this reason, an embodiment of the present invention provides a storage medium in which multiple instructions are stored. These instructions can be loaded by a processor to execute the steps in any of the embodiments of the output power multi - gear automatic calibration method provided by the embodiments of the present invention.

[0083] Among them, the storage medium can include: read - only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc.

[0084] Since the instructions stored in this storage medium can execute the steps in any of the embodiments of the output power multi - gear automatic calibration method provided by the embodiments of the present invention, it can achieve the beneficial effects that any of the output power multi - gear automatic calibration methods provided by the embodiments of the present invention can achieve. For details, see the previous embodiments and will not be elaborated here.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic calibration method for multi - gear output power, characterized in that, The method realizes automatic calibration of a power amplification device through a calibration system. The system includes a test host, which contains a test platform and calibration software. The test platform is communicatively connected to a power meter, a signal source, and the calibration software respectively. The radio frequency power control module is communicatively connected to the calibration software, the signal source, and the power meter respectively. The radio frequency power control module is used to control the radio frequency output power and store calibration information. The radio frequency power control module includes a digital control attenuator. The test platform is used to control the signal source to set the calibration frequency step and provide an excitation signal, and at the same time control the power meter to read the output power of the current power amplifier. The calibration software is used to control the test platform and send a set attenuation command to the radio frequency power control module at the same time. The method includes: S100: Set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital control attenuator; S200: In response to the received calibration instruction, set the digital control attenuator at a frequency point. The value of the digital control attenuator starts from the starting value and goes to the maximum attenuation according to the attenuation step; S300: After each digital control attenuation setting is completed, the calibration software sends a read command to the test platform. After the test platform finishes reading, it uploads the read data to the calibration software. The calibration software starts to set the next attenuation value only after receiving the read data; S400: After all attenuation values at a frequency point are set, it will be restored to the set starting value, and at the same time a command for the next frequency point will be sent to the test platform, and then steps S200 - S400 are repeated until all frequency points are scanned; S500: The calibration software reads the grading information to be calibrated and finds all power values closest to the target grade at a frequency point, then finds the minimum error value and temporarily stores the data set of this frequency point in the calibration data; S600: Generate a calibration document after all grades are calibrated; after all grades are calibrated, an Excel file and a calibration attenuation table file will be generated. The Excel file contains two worksheets. One worksheet is all data, which contains all the scanned data, and the other worksheet is cal data, which contains the data classified by grade after calibration; the calibration attenuation table file is in a custom format, which only contains grade and attenuation value information, and the frequency is in the defined step, hidden in the number of data.

2. The output power multi-gear automatic calibration method according to claim 1, characterized in that The power meter includes a programmable power meter for reading the output power. The signal source includes a programmable signal source for providing excitation input to the entire calibration system. Before step S100, the method further includes selecting appropriate programmable power meters and programmable signal sources according to the specific implementation environment.

3. The output power multi-gear automatic calibration method according to claim 1, wherein The test platform is set as a local TCP server, and the calibration software is set as a client. The information interaction between the test platform and the calibration software uses the JSON format, and the calibration attenuation table saved by the calibration software uses the JSON format.

4. The output power multi-gear automatic calibration method according to claim 1, characterized in that The radio frequency power control module further includes an MCU processor, and the internal FLSAH of the MCU processor is used to store the calibration attenuation table.

5. The output power multi-gear automatic calibration method according to claim 1, characterized in that The scanning data and gear classification include the excitation frequency, excitation power, power meter reading, actual RF power, forward detection voltage, reverse detection voltage, forward detection power, reverse detection power, and set attenuation value of the current frequency point.

6. The output power multi-gear automatic calibration method according to claim 1, wherein, The calibration document includes a scanning data document, a gear classification document, and a calibration attenuation table document.

7. The output power multi-gear automatic calibration method according to claim 6, characterized in that, The calibration document is manually modified.

8. An output power multi-gear automatic calibration device, characterized in that, The device is used to implement the method described in claim 1, and includes: A frequency setting module, configured to execute step S100: set the frequency range and frequency step, and at the same time set the attenuation range and attenuation step of the digital controlled attenuator; An attenuation setting module, configured to execute step S200: in response to the received calibration instruction, set the digital controlled attenuator at a frequency point, and the value of the digital controlled attenuator starts from the starting value and advances to the maximum attenuation according to the attenuation step; A data uploading module, configured to execute step S300: after each digital controlled attenuation setting is completed, the calibration software sends a read command to the test platform, and the test platform uploads the read data to the calibration software after the reading is completed. The calibration software starts to set the next attenuation value only after receiving the read data; A frequency point scanning module, configured to execute step S400: after all attenuation values at a frequency point are set, it will be restored to the set starting value, and at the same time send a command for the next frequency point to the test platform, and then repeat steps S200 - S400 until all frequency points are scanned; A minimum error searching module, configured to execute step S500: the calibration software reads the grading information to be calibrated and searches for all power values closest to the target gear at a frequency point, then finds the minimum error value and temporarily stores the data set of this frequency point in the calibration data; A document generation module, configured to execute step S600: generate a scanning data document, a gear classification document, and a calibration attenuation table document after all gear calibrations are completed.

9. A computer device, characterized in that, The computer device includes a processor and a memory, and a computer program is stored in the memory. The computer program is loaded and executed by the processor to implement the multi - gear automatic calibration method for output power as described in any one of claims 1 - 7.

10. A computer-readable storage medium, characterized in that, A computer program is stored in the storage medium. The computer program is loaded and executed by the processor to implement the multi - gear automatic calibration method for output power as described in any one of claims 1 - 7.

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