Power calibration method for wireless modules

Abstract

The present invention discloses a power calibration method for a wireless module, wherein the method is to obtain the actual power level of the wireless module, determine whether the actual power level meets the target power level range, and if it is determined to meet a first defined calibration range or a second defined calibration range according to calibration data, then the calibration is determined to be completed. The power calibration method can be executed according to a test device to write calibration data to the wireless module.

Description

Technical Field

[0001] The invention relates to a wireless module power calibration, in particular to a wireless module power calibration method. Background Art

[0002] Wireless module products have a testing link in the production process, that is, they need to go through a power calibration procedure to ensure that the power level emitted by the wireless module is correct. However, in the actual operation experience of the test, the calibration may cause the signal attenuation of the expected test path to change due to poor contact of the test needle holder or other reasons such as changing different test wires for testing, thereby causing calibration deviation. However, this problem cannot be detected under the verification of a machine at the same station, so the test station is generally divided into at least two different stations, one station for power calibration and the other station for verification, and the two machines are used for testing respectively. This requires repeated equipment investment and more testing man-hours. Summary of the invention

[0003] In view of the problems raised by the prior art, the problems of long calibration time, repeated equipment investment and calibration errors caused by calibration deviation are solved.

[0004] According to one embodiment of the present invention, a power calibration method for a wireless module is proposed, which is applicable to a test device of a single test station. The method includes: determining whether an actual power level of the wireless module conforms to a target power level range; and determining whether a calibration data used for calibration of the wireless module conforms to a first defined calibration range; wherein when the actual power level conforms to the target power level range and the calibration data conforms to the first defined calibration range, the calibration is completed.

[0005] The possible technical effect of the present invention is that a single test device can independently complete power calibration and verification, reducing equipment investment and testing time. On the one hand, the present invention can also simultaneously integrate the use of two test devices and avoid the occurrence of adverse test results caused by calibration errors.

[0006] Furthermore, when comparing whether the calibration data is within the defined range, under normal data distribution, most of the wireless modules meet the defined range requirements, and only a very small number require another program to determine. The present invention can provide a large number of power verification test needs.

[0007] In order to further understand the technology, methods and technical effects adopted by the present invention to achieve the established objectives, please refer to the following detailed description and drawings of the present invention. It is believed that the objectives, features and characteristics of the present invention can be deeply and specifically understood thereby. However, the drawings in the specification are only provided for reference and explanation and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A power calibration method flow of a wireless module is presented according to an embodiment of the present invention.

[0009] Figure 2 A waveform diagram showing the corresponding relationship between the actual power level and the target power level of the wireless module and the output power and the channel displayed in the range according to an embodiment of the present invention is presented.

[0010] Figure 3 A data histogram showing the relationship between calibration quantity and calibration offset value of the calibration data is presented, showing a defined calibration range of the calibration data according to an embodiment of the present invention.

[0011] Figure 4 An embodiment of the present invention is presented. Figure 2 The waveform diagram showing the relationship between output power and calibration compensation value.

[0012] Figure 5 An embodiment of the present invention is presented. Figure 1 After the wireless module power calibration is judged to be completed, the method also includes writing the calibration data judged to be completed into the wireless module.

[0013] Figure 6 A test device according to an embodiment of the present invention is presented, which is a schematic diagram of the structure of the test device for calibrating a wireless module using a power calibration method of a wireless module. DETAILED DESCRIPTION

[0014] The following is an explanation of the implementation method of the "power correction method of wireless module" disclosed in the present invention through specific specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following implementation methods will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For technicians with general knowledge and ordinary skills in this field, other drawings can be obtained based on these drawings without making too much effort.

[0016] The present invention discloses a power calibration method for a wireless module. The method can be constructed as a computer application, or constructed in a touch screen of a user interface or any computer or handheld intelligent device with control and computing functions, and connected with a wireless module to perform one-time or multiple calibration and judgment on the power level of the wireless module. The wireless module can be, for example, a radio frequency test performed on a device such as an antenna, radio, Bluetooth, WiFi, a positioning system, near field communication, a wireless radio frequency identification tag, ZigBee communication or a mobile phone communication, or can refer to a test performed on any device having a wireless radio frequency module.

[0017] Therefore, the present invention is aimed at testing wireless module products, for example, during the production process, and can first make a preliminary correction to the original power level of the wireless module product, and then judge whether the actual power level of the wireless module product after correction is within or outside the target power level, and make a preliminary screening. And, it is judged whether the calibration data meets the range of the defined calibration data to confirm whether the wireless module has been calibrated. In addition, the server can also receive or obtain the current calibration data corresponding to the currently tested wireless module to establish a database of calibration data stored in the server, so that the calibration data of the same wireless module can be compared with the assistance of the background data, and human judgment errors can be avoided. After the correction and judgment are completed, the calibration data that has been judged to be completed is finally written to the wireless module by the test equipment, and the wireless module product with the correct output power level is obtained, and there is no need to check again whether the output power level of the wireless module is correct.

[0018] According to one embodiment of the present invention, see Figure 1 , Figure 1 The power calibration method flow of a wireless module shown in an embodiment of the present invention is presented. The present invention provides a power calibration method for a wireless module, which is applicable to a test device of a single test station, and the method includes but is not limited to: step S100, using a single test device to calibrate the original power level of the wireless module using a calibration data. Step S101, verifying the corrected transmission power level of the wireless module by a single test device to obtain the actual power level of the wireless module. Step S103, judging whether the actual power level of the wireless module meets a target power level range. Step S105, judging whether the calibration data used in step S100 meets a first defined calibration range. Step S107, sending the calibration data to a server. Step S109, confirming whether the calibration data meets a second defined calibration range of the server. Step S111, calibration is completed. Step S113, calibration fails.

[0019] In one embodiment, please continue to refer to Figure 1 , and refer to Figure 2 , Figure 3 , Figure 2 A waveform diagram showing the corresponding relationship between the actual power level and the target power level of the wireless module and the output power and the channel displayed in the range according to an embodiment of the present invention is presented. Figure 3 A data histogram showing the relationship between calibration quantity and calibration offset value of the calibration data is presented, showing a defined calibration range of the calibration data according to an embodiment of the present invention.

[0020] In step S100, the power level of the wireless module to be calibrated can be measured by a single test device to obtain the original power level of the wireless module. In this embodiment, according to the different frequency bands (Channels) used for the output power of the wireless module, it can be known that the multiple original power levels of the wireless module tested multiple times are an unstable curve in different channel ranges. In order to make the transmission power of the wireless module fall within the upper or lower limit of the target power level range when it leaves the factory, in step S100, the original power level of the wireless module is calibrated using a calibration data by a single test device. Then, step S101 is performed to verify the calibrated transmission power level of the wireless module by a single test device to obtain the actual power level of the wireless module.

[0021] In one embodiment, the process proceeds to step S103. In this step, if it is determined that the actual power level of the wireless module does not meet the target power level range, for example, the actual power level of the wireless module exceeds or far exceeds the target power level range, the process proceeds to step S113, indicating that the calibration has failed, and the calibration judgment process can be terminated. On the contrary, if it is determined that the actual power level of the wireless module meets the target power level range, the process proceeds to step S105.

[0022] It is also possible that the original power level of the wireless module directly meets the target power level range without the need for correction adjustment of the wireless module.

[0023] Therefore, in one embodiment, according to Figure 2 The example shows that if the wireless module needs to be power calibrated, and the original power level of the wireless module is to be adjusted to the ideal target power level, Figure 2 The data value may firstly generate calibration data corresponding to the following Table 1, and then execute step S100.

[0024]

[0025] Table 1

[0026] It is worth mentioning that the calibration data is not necessarily data displayed in a table format, but can also be a program code containing a calibration calculation formula or various data that can be input into the calibration calculation formula and program.

[0027] Therefore, in step S105, Table 1 is used according to Figure 3, confirm whether the calibration data meets the first defined calibration range of the calibration data, and if it meets the first defined calibration range, execute step S111, that is, the calibration is completed.

[0028] In one embodiment, the data of the first defined calibration range is data corresponding to the number of calibration compensation values ​​in a plurality of calibration data. The first defined calibration range has a limited range, and the data within the limited range conforms to the range defined by the calibration data.

[0029] In one embodiment, since most of the wireless modules whose output power does not meet the target power level range have been excluded in step S103, the judgment of the calibration data performed in step S105, under the normal distribution of data in the defined calibration range of the calibration data, most of the wireless modules can meet the range requirements of this defined calibration range, and only a very small number of wireless modules need to be re-judged.

[0030] Therefore, if it is determined that it does not meet the requirements after executing step S105, it may be because the calibration data does not meet the first defined calibration range, or the first defined calibration range currently used is incorrect and cannot be used to compare the calibration data. Therefore, if it is impossible to compare or confirm whether the calibration data is correct, steps S107 and S109 are executed to send the calibration data to the server, and then the calibration data of the wireless module currently being calibrated is compared with a second defined calibration range of the server. After judging and comparing, if it is confirmed that the calibration data of the wireless module meets the second defined calibration range, step S111 is executed, that is, the calibration is completed, otherwise step S113 is executed, that is, the calibration fails. In one embodiment, in step S107, sending the calibration data to the server also includes storing the calibration data on the server.

[0031] According to the above steps, in one embodiment, the calibration data can be multiple calibration data that conform to different operating frequency bands of the wireless module at one time, and especially multiple calibration data that calibrates the output power of the wireless module at one time. And the construction of the calibration data in the server can also be the calibration data used specifically for each type of wireless module to be verified by different test equipment each time, because the range of calibration data definition corresponding to each type of wireless module is different.

[0032] according to Figure 4 And cooperate Figure 2 And Table 1, Figure 4 An embodiment of the present invention is presented. Figure 2The waveform diagram showing the corresponding relationship between the output power and the calibration offset value. In one embodiment, the calibration data is calculated based on the difference between the original power level and the ideal target power level and divided by a calibration parameter. For example, the calibration offset value of channel 1 in Table 1 is negative six, that is, when the calibration offset value (Cal Offset) is reduced by one unit of the constant value, the calibration adjustment of the output power can be reduced by 0.25dB. The constant value of 0.25 is the calibration parameter. The calibration parameters of each wireless module of different types or specifications are different. Figure 2 , Figure 4 For example, the target power level of the wireless module's output power is expected to be adjusted to 16dBm, but the original power level is 17.5dBm, which is 17.5-16=1.5dBm more than expected. This means that the entire original power level curve must be adjusted down by 1.5dBm, and according to Figure 2 , the original power level is adjusted to the target power level. In fact, the output power after correction is an actual power level, which may have a slight error with the ideal target power level.

[0033] Continue reading Figure 5 , Figure 6 , Figure 5 An embodiment of the present invention is presented. Figure 1 After the wireless module power calibration is judged to be completed, the method also includes writing the calibration data judged to be completed into the wireless module. Figure 6 The present invention shows a test device shown in an embodiment of the present invention, and a schematic diagram of the structure of the test device for calibrating a wireless module using a power calibration method of a wireless module. In one embodiment, when the calibration data of the wireless module is written by the test device 1, the test device 1 may include a transmission line 2 that can transmit a radio frequency signal, a radio frequency signal transmission connector 3, a development board 4 (Evaluation Board), a test needle holder 5, and a test object 6 such as a wireless module. The specific structure of the test device 1 of the present invention is not limited to the aforementioned, and can also be any existing verification test device or a verification test device that can execute a program. The mechanism or test module should have, Figure 6 The illustrations are for illustrative purposes only.

[0034] In one embodiment, before executing steps S100 and S101 , step S100A may be executed first, that is, measuring the wireless module by a single testing device to obtain the original power level of the wireless module.

[0035] In one embodiment, after executing steps S105 and S109, step S110 is further executed to write calibration data to the wireless module. That is, after the original power level of the wireless module is obtained by the test device 1, the test device 1 can be used to perform relevant steps to verify the original power level emitted by the wireless module being calibrated, and then step S110 is executed to write the calibration data of the calibration judgment completion to the wireless module by the test device 1, and the wireless module is calibrated, and finally step S111 is executed to complete the calibration.

[0036] In one embodiment, when executing step S105, if it is confirmed that the calibration data does not conform to the first defined calibration range, it is necessary to consider whether the signal characteristics of the wireless module cause the calibration data to be inconsistent with the first defined calibration range. At this time, step S107 is executed to send the calibration data of the wireless module to the server for comparison, that is, to confirm whether the calibration data of the wireless module falls within the second defined calibration range. The data of the second defined calibration range is the previous calibration data of the wireless module. Although the signal characteristics of the wireless module cause the calibration data of the wireless module to deviate from the first defined calibration range, the actual power level after correction still conforms to the target power level range. Therefore, as long as the calibration data of the same wireless module is sent to the server and compared with the calibration data of the same wireless module uploaded to the server by other test machines or other calibration data defined ranges, it can be confirmed that the calibration data conforms to the second defined calibration range, and the power calibration of the wireless module can be completed.

[0037] In one embodiment, the execution order of step S103 and step S105 is not Figure 1 or Figure 5 The order of presentation is the main one, and step S105 may be performed first and then step S103, and the power calibration of the wireless module can also be completed.

[0038] [Possible technical effects of the present invention]

[0039] A single test device can independently complete power calibration and verification, thereby reducing equipment investment and test time. On the one hand, the present invention can also simultaneously integrate the use of two test devices, thereby avoiding the occurrence of adverse test results caused by calibration errors.

[0040] Moreover, when comparing whether the calibration data is within the defined range, under the normal distribution of the data, most of the wireless modules meet the requirements of this defined range, and only a very small part requires another program to retest to determine. The present invention can provide a large number of power verification test needs.

[0041] The present invention can also use the calibration data constructed by the server to compare the current calibration data of the wireless module, and use big data analysis to assist in determining whether the calibration data obtained by the wireless module product after executing the power correction judgment is reasonable, thereby improving the accuracy of the wireless module product verification.

[0042] Finally, it should be noted that in the foregoing description, although the concept of the technology of the present invention has been specifically shown and described in a number of exemplary embodiments, those skilled in the art will understand that various changes in form and details may be made thereto without departing from the scope of the concept of the technology of the present invention as defined by the following claims.

Claims

1. A power calibration method for a wireless module, characterized in that: Applicable to a test device of a single test station, the method comprises: Correcting an original power level of the wireless module using calibration data by the single test equipment; Verifying the calibrated transmission power level of the wireless module to obtain an actual power level of the wireless module; Determining whether the actual power level of the wireless module meets a target power level range; When the actual power level meets the target power level range, determining whether calibration data used for calibration of the wireless module meets a first defined calibration range; wherein when the actual power level meets the target power level range and the calibration data meets the first defined calibration range, the calibration is completed; and When the calibration data does not conform to the first defined calibration range, sending the calibration data to a server, and confirming whether the calibration data conforms to a second defined calibration range of the server; When the actual power level meets the target power level range and the calibration data meets the second defined calibration range, the calibration is completed.

2. The power calibration method of the wireless module according to claim 1, characterized in that: When the wireless module is calibrated, the method further includes writing the calibration data into the wireless module.

3. The power calibration method of a wireless module according to any one of claims 1 to 2, characterized in that: The calibration data is a plurality of calibration data that conform to different operating frequency bands of the wireless module.

4. The power calibration method of a wireless module according to any one of claims 1 to 2, characterized in that: When the actual power level does not meet the target power level range, the calibration fails.

5. The power calibration method of a wireless module according to claim 1, characterized in that: The calibration data is obtained by dividing the difference between the original power level and a target power level by a correction parameter.

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