Source meter range management method, source meter and computer program product

Abstract

A source meter range management method, a source meter and a computer program product are applied to the technical field of source meters, the source meter range management method comprises output range switching and measuring range switching, and the measuring range switching comprises measuring range up-switching and measuring range down-switching. The source meter range management method corresponding to output range switching comprises the following steps: performing an output range switching mode: switching a current source meter configuration mode, and configuring the switched source meter configuration mode based on a voltage value measured by a current circuit and a current value measured by the current circuit; under the switched source meter configuration mode, switching the actual output range into a target output range; and switching the switched source meter configuration mode back to the current source meter configuration mode, so that the target output range takes effect. The current source meter configuration mode is switched, and the voltage value measured by the current circuit and the current value measured by the current circuit can be maintained, so that current interruption or voltage interruption can be avoided, sudden change of current and voltage is reduced, and the switching requirement is met.

Description

Technical Field

[0001] The present application relates to the technical field of source meters, and particularly to a source meter range management method, a source meter, and a computer program product. Background Art

[0002] A source meter can be used as a source for output or as a meter for measurement, that is, it includes a four-quadrant voltage source, a four-quadrant current source, a voltmeter, and an ammeter. Therefore, source meters can be widely used in fields such as automated testing and semiconductor packaging and testing.

[0003] Among them, to achieve high-precision output and measurement, a source meter needs to switch to an appropriate range. Therefore, the range switching of the source meter must meet the switching characteristics of the source, that is, seamless switching without voltage or current interruption during range switching, and also meet the switching characteristics of the meter, that is, when switching ranges, the impact on the voltage and current changes of the load is minimized.

[0004] However, in the current technical solutions, when the source meter switches ranges, it directly performs range switching, making it difficult to meet the above switching requirements. In this regard, new technical solutions are still needed. Summary of the Invention

[0005] The main technical problem to be solved by the present application is that the range switching of the source meter cannot meet the switching requirements.

[0006] According to a first aspect, in one embodiment, a source meter range management method is provided, including: Obtaining configuration parameters, where the configuration parameters include a target output range; Obtaining the current source meter configuration mode, and obtaining the actual output range, the measured voltage value of the current circuit, and the measured current value of the current circuit in the current source meter configuration mode; wherein, the source meter configuration mode includes a voltage source mode and a current source mode; Performing an output range switching mode: switching the current source meter configuration mode to obtain a switched source meter configuration mode, and configuring the switched source meter configuration mode based on the measured voltage value of the current circuit and the measured current value of the current circuit, so that the switched source meter configuration mode can maintain the measured voltage value of the current circuit and the measured current value of the current circuit; wherein, if the current source meter configuration mode is the voltage source mode, the switched source meter configuration mode is the current source mode; if the current source meter configuration mode is the current source mode, the switched source meter configuration mode is the voltage source mode; In the switched source meter configuration mode, switching the actual output range to the target output range; Switching the switched source meter configuration mode back to the current source meter configuration mode to complete the output range switching mode and make the target output range effective.

[0007] In some embodiments, configuring the switched source meter configuration mode based on the measured voltage value and the measured current value of the current circuit includes: If the switched source meter configuration mode is the current source mode, configure the current output value of the current source mode as the measured current value of the current circuit in the voltage source mode before switching, and configure the voltage limit value of the current source mode to include the measured voltage value of the current circuit in the voltage source mode before switching; If the switched source meter configuration mode is the voltage source mode, configure the voltage output value of the voltage source mode as the measured voltage value of the current circuit in the current source mode before switching, and configure the current limit value of the voltage source mode to include the measured current value of the current circuit in the current source mode before switching.

[0008] In some embodiments, before switching the switched source meter configuration mode back to the current source meter configuration mode, it further includes: In the switched source meter configuration mode, switch the limit range in the switched source meter configuration mode to match the target output range.

[0009] In some embodiments, the source meter range management method further includes: Judge the magnitude relationship between the actual output range and the target output range; If the actual output range is less than the target output range, first switch the actual output range to the target output range, and then switch the limit range in the switched source meter configuration mode to match the target output range; If the actual output range is greater than the target output range, first switch the limit range in the switched source meter configuration mode to match the target output range, and then switch the actual output range to the target output range.

[0010] In some embodiments, the source meter range management method further includes: Obtain the actual measurement range in the current source meter configuration mode, and judge whether the actual measurement range meets the measurement range switching condition; If the measurement range switching condition is met, perform the measurement range switching mode based on the target measurement range: Configure the current source meter configuration mode based on the measured voltage value and the measured current value of the current circuit, so that the current source meter configuration mode can maintain the measured voltage value and the measured current value of the current circuit; In the current source meter configuration mode, switch the actual measurement range to the target measurement range, and switch the limit output of the current source meter configuration mode to match the target measurement range, so as to complete the measurement range switching mode and make the target measurement range effective.

[0011] In some embodiments, the configuration parameters further include a maximum measurement range and a minimum measurement range, and the source meter range management method further includes: Obtain the actual measurement range in the current source meter configuration mode; If the actual measurement range is less than the minimum measurement range, perform a measurement range up-switching measurement range switching mode to switch the measurement range of the current source meter configuration mode to the minimum measurement range; If the actual measurement range is greater than the maximum measurement range, perform a measurement range down-switching measurement range switching mode to switch the measurement range of the current source meter configuration mode to the maximum measurement range; If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the measured voltage value of the current circuit or the measured current value of the current circuit is greater than the maximum threshold value under the actual measurement range, perform a measurement range up-switching measurement range switching mode to switch the actual measurement range to the measurement range corresponding to the measured voltage value of the current circuit or the measured current value of the current circuit; If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the measured voltage value of the current circuit or the measured current value of the current circuit is less than the maximum threshold value under the actual measurement range, perform a measurement range down-switching measurement range switching mode to switch the actual measurement range to the measurement range corresponding to the measured voltage value of the current circuit or the measured current value of the current circuit.

[0012] In some embodiments, the measurement range up-switching measurement range switching mode includes: Based on the actual measurement range and the measured voltage value of the current circuit or the measured current value of the current circuit corresponding to the actual measurement range, determine whether the actual measurement range meets the measurement range up-switching of a preset level, and the preset level is greater than or equal to two levels; If the measurement range up-switching of the preset level is met, perform the measurement range up-switching of the preset level on the actual measurement range, so that the level of the measurement range after up-switching is the current level of the actual measurement range plus the preset level.

[0013] In some embodiments, the configuration parameter further includes a minimum preset measurement range, which is greater than the minimum measurement range and less than the maximum measurement range. The source meter range management method further includes: Obtaining the actual measurement range in the current source meter configuration mode; When the measured voltage value or the measured current value of the current circuit corresponding to the actual measurement range is zero, and the actual measurement range is greater than the minimum preset measurement range, switching the actual measurement range to the minimum preset measurement range; and / or When the measured voltage value or the measured current value of the current circuit changes from zero to non-zero, switching from the minimum preset measurement range to the measurement range corresponding to the measured voltage value or the measured current value of the current circuit.

[0014] According to a second aspect, an embodiment provides a source meter range management method, including: Obtaining the actual measurement range in the current source meter configuration mode, and determining whether the actual measurement range meets the measurement range switching condition; If the measurement range switching condition is met, then performing a measurement range switching mode based on the target measurement range: Configuring the current source meter configuration mode based on the measured voltage value and the measured current value of the current circuit, so that the current source meter configuration mode can maintain the measured voltage value and the measured current value of the current circuit; In the current source meter configuration mode, switching the actual measurement range to the target measurement range, and switching the limit output of the current source meter configuration mode to match the target measurement range, so as to complete the measurement range switching mode and make the target measurement range effective.

[0015] According to a third aspect, an embodiment provides a source meter, including: A source output module for performing voltage output and current output; A current measurement module for measuring the current of the load; A voltage measurement module for measuring the voltage of the load; A processor for implementing the method described in the first aspect or the second aspect when executing a computer program and / or instructions by the processor.

[0016] According to a fourth aspect, an embodiment provides a computer program product, including a computer program and / or instructions, which implement the method described in the first aspect or the second aspect when executed by a processor.

[0017] A source meter range management method, a source meter, and a computer program product according to the above embodiments. When switching the output range, first obtain the current source meter configuration mode, the actual output range in the current source meter configuration mode, the measured voltage value of the current circuit, and the measured current value of the current circuit. Then, switch the current source meter configuration mode, and configure the switched source meter configuration mode based on the measured voltage value of the current circuit and the measured current value of the current circuit, so that the switched source meter configuration mode can maintain the measured voltage value of the current circuit and the measured current value of the current circuit. In the switched source meter configuration mode, switch the actual output range to the target output range, and then switch the switched source meter configuration mode back to the current source meter configuration mode to complete the switching of the output range and make the target output range effective. Since the current source meter configuration mode is switched and the measured voltage value of the current circuit and the measured current value of the current circuit can be maintained, switching the actual output range to the target output range in the switched source meter configuration mode can avoid current interruption or voltage interruption caused by switching the output range, and at the same time can reduce the sudden change of current and voltage, thus meeting the switching requirements of output range switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of a source meter according to an embodiment; Figure 2 FIG. is a schematic structural diagram of a source meter according to another embodiment; Figure 3 FIG. is a schematic structural diagram of a source output module according to an embodiment; Figure 4 FIG. is a schematic structural diagram of a voltage measurement module according to an embodiment; Figure 5 FIG. is a schematic flow diagram of a source meter range management method according to an embodiment; Figure 6 FIG. is a schematic time diagram of output range switching according to an embodiment; Figure 7 FIG. is a schematic flow diagram of a source meter range management method according to an embodiment; Figure 8 FIG. is a schematic flow diagram of a source meter range management method according to an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present application will be further described in detail below in conjunction with specific embodiments and the accompanying drawings. Similar elements in different embodiments are denoted by related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and the related operations can be fully understood based on the descriptions in the specification and general technical knowledge in the art.

[0020] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0022] In some embodiments of the present application, when switching the output range, it is necessary to switch the configuration mode of the current source meter configuration mode, and in the switched source meter configuration mode, switch the actual output range to the target output range, so that switching the actual output range to the target output range in the switched source meter configuration mode can avoid current interruption or voltage interruption caused by switching the output range. Further, the switched source meter configuration mode will also be reconfigured based on the measured voltage value and measured current value of the current circuit, so that the switched source meter configuration mode can maintain the measured voltage value and measured current value of the current circuit, thereby reducing the sudden change of current and voltage when switching the output range in the switched source meter configuration mode to meet the switching requirements of the output range switching.

[0023] In some embodiments, a source meter is provided. The source meter can be used as a source to output voltage and current, and can also be used as a meter to measure voltage and current. Please refer to Figure 1 , the source meter includes a source output module 10, a current measurement module 20, a voltage measurement module 30, and a processor 40, which will be specifically described below.

[0024] The source output module 10 is used for voltage output and current output.

[0025] In some embodiments, the source output module 10 can be in a voltage source mode or a current source mode under the control of a processor. In the voltage source mode, a constant voltage can be output, and a current limited in the voltage source mode can be output. In the current source mode, a constant current can be output, and a voltage limited in the current source mode can be output.

[0026] Please refer to Figure 2 , in some embodiments, the source output module 10 includes a DAC (digital-to-analog converter) and an operational amplifier module. The digital-to-analog converter is used to convert a digital signal (codeword) representing a voltage value or a current value into an analog signal for output, so as to achieve an analog voltage output or an analog current output with a corresponding amplitude. The operational amplifier module is used to amplify or reduce the analog voltage output or the analog current output and then use it as the output of the source output module 10 to meet the output requirements.

[0027] In some embodiments, the digital-to-analog converter can be implemented based on the digital-to-analog converter.

[0028] Please refer to Figure 3 , in some embodiments, the operational amplifier module includes an operational amplifier and a plurality of resistor groups (such as resistor Ri1, resistor Ri2, resistor Ri3, and resistor Ri4). Each resistor group can include one or more resistors. Different resistor groups can make the operational amplifier have different amplification factors or reduction factors. Therefore, different resistor groups can be selected to adjust the output of the amplifier, so that different resistor groups can correspond to different output ranges of the operational amplifier. By adjusting the operational amplifier to connect to different resistor groups, the corresponding output range is adjusted.

[0029] The current measurement module 20 is used to measure the current of the load.

[0030] Please refer to Figure 2 , in some embodiments, the current measurement module 20 includes a sampling resistor group, an operational amplifier, and an ADC (analog-to-digital converter). The sampling resistor group includes a plurality of sampling resistors (resistor R1, resistor R2... resistor Rn). The sampling resistors are used to be connected in series with the load to collect the current of the load. Specifically, the amplifier respectively obtains the voltages at both ends of the sampling resistor and performs amplification processing and then outputs them to the analog-to-digital converter. The analog-to-digital converter performs analog-to-digital conversion on the voltage and then outputs it to the processor. The processor is used to calculate the current value measured by the corresponding sampling resistor based on the voltage value. Among them, the resistance values of different sampling resistors are different. Therefore, by selecting different sampling resistors to be connected, different current measurement ranges can be correspondingly selected.

[0031] The voltage measurement module 30 is used to measure the voltage of the load.

[0032] Please refer to Figure 2 In some embodiments, the voltage measurement module 30 includes an operational amplifier module and an ADC (analog-to-digital converter). The input end of the operational amplifier module is used to connect to the input end of the load, that is, the input end of the operational amplifier module is bypass-connected to the output port of the source meter. The operational amplifier module amplifies or reduces the voltage at its input end and then outputs it to the analog-to-digital converter. The analog-to-digital converter performs analog-to-digital conversion on the voltage and then outputs it to the processor, and the processor is used to calculate the corresponding voltage value.

[0033] Please refer to Figure 4 In some embodiments, the operational amplifier module includes an operational amplifier and multiple resistor groups (such as resistor Rv1, resistor Rv2, resistor Rv3, and resistor Rv4). Each resistor group can include one or more resistors. Different resistor groups can make the operational amplifier have different amplification factors or reduction factors. Therefore, selecting different resistor groups can correspond to different output ranges of the operational amplifier. Thus, the corresponding voltage measurement range can be adjusted by adjusting the operational amplifier to connect to different resistor groups.

[0034] The processor 40 is used to control the source output module 10, the current measurement module 20, and the voltage measurement module 30. For example, it controls the configuration mode and output range of the source output module 10 to meet the output requirements, for example, controls the current measurement range of the current measurement module 20 to meet the current measurement accuracy requirements, and for example, controls the voltage measurement range of the voltage measurement module 30 to meet the voltage measurement accuracy requirements. In some embodiments, the processor can be implemented based on devices with processing functions such as FPGA, CPU, and microcontroller.

[0035] In some embodiments, the processor 40 can control the output of the source output module 10 based on the current loop algorithm and the voltage loop algorithm. Among them, the current loop algorithm is used to control the output current of the source output module 10 to meet the requirements, and the voltage loop algorithm is used to control the output voltage of the source output module 10 to meet the requirements. Both the current loop algorithm and the voltage loop algorithm can adopt existing feedback control algorithms. For example, based on the current loop algorithm, a target output current is set. At this time, the processor controls the source output module 10 to output based on the target output current, and obtains the current output current based on the current measurement module 20. The current loop algorithm calculates the difference between the current output current and the target output current, and the processor then adjusts the output of the source output module 10 based on this difference, so that the output of the source output module 10 reaches the target output current through feedback control. The specific implementation process of this existing feedback control algorithm will not be elaborated here.

[0036] The above is some description of the source meter. The following will specifically describe the range management control of the source meter. In some embodiments, a source meter range management method is provided, which can be applied to the above source meter. Please refer to Figure 5 The source meter range management method may include the following steps: Step 100: Obtain configuration parameters.

[0037] In some embodiments, the source meter can obtain the configuration parameters set by the user based on the corresponding control panel. For example, the configuration parameters can be obtained based on touch screens, buttons, knobs, etc., or can be obtained based on wired communication and wireless communication for the configuration parameters sent by the user.

[0038] In some embodiments, the configuration parameters at least include the target output range. For example, in the voltage source mode, the target output range is the corresponding target voltage output range, and in the current source mode, the target output range is the corresponding target current output range. By configuring different output ranges, the source output module 10 of the source meter can output within a larger output range or a smaller output range.

[0039] In some embodiments, the configuration parameters can also include configuring the source meter configuration mode, as well as information such as the target output value, limit value, and measurement range in this source meter configuration mode. Among them, the source meter configuration mode includes the voltage source mode and the current source mode. For example, configure the current source meter configuration mode as the voltage source mode, and the voltage output value, current limit value (including positive current limit value and negative current limit value), and current measurement range in the voltage source mode. For example, configure the current source meter configuration mode as the current source mode, and the current output value, voltage limit value (including positive voltage limit value and negative voltage limit value), and voltage measurement range in the current source mode.

[0040] Step 110: Obtain the current source meter configuration mode, and obtain the actual output range, the measured voltage value of the current circuit, and the measured current value of the current circuit in the current source meter configuration mode.

[0041] In some embodiments, current measurement and voltage measurement can be performed after the source meter output is stable to obtain the measured voltage value of the current circuit and the measured current value of the current circuit. For example, in the current source meter configuration mode, the corresponding target output value and limit value are configured. When the actual output reaches the target output value or reaches the limit value, the source meter output reaches stability.

[0042] Step 120: Switch the current source meter configuration mode, and configure the switched source meter configuration mode based on the measured voltage value of the current circuit and the measured current value of the current circuit.

[0043] Before switching the output range, first switch the current source meter configuration mode to obtain the switched source meter configuration mode. Among them, the configuration mode switch needs to be performed after the source meter output reaches stability.

[0044] In some embodiments, if the current source meter configuration mode is the voltage source mode, the voltage output range of the voltage source mode needs to be switched currently. At this time, the switched source meter configuration mode is the current source mode; if the current source meter configuration mode is the current source mode, the current output range of the current source mode needs to be switched currently. At this time, the switched source meter configuration mode is the voltage source mode. Among them, switching the output range is actually switching the resistor group related to the magnification or reduction factor in the source output module 10, and the voltage source mode and the current source mode have different resistor groups respectively. The resistor group corresponding to the voltage source mode is used to switch the voltage output range, and the resistor group corresponding to the current source mode is used to switch the current output range.

[0045] In some embodiments, if the current source meter configuration mode is the voltage source mode, the source meter will control the output voltage in the voltage source mode to be the target output voltage and measure the current of the load to control the output current in the voltage source mode within the limit current range. Among them, when the source meter controls the output of the target output voltage, it can perform feedback control based on the voltage loop algorithm. For example, when the output voltage is greater than the target output voltage, the difference is calculated based on the voltage loop algorithm to reduce the output voltage to the target output voltage. On the contrary, when the output voltage is less than the target output voltage, the output voltage is increased to the target output voltage. At this time, the voltage loop algorithm plays a controlling role. When the source meter controls the output current within the limit current range, it can perform feedback control based on the current loop algorithm. For example, when the output current exceeds the limit current range, the difference is calculated based on the current loop algorithm to reduce or increase the output current to within the limit current range. At this time, the current loop algorithm plays a controlling role. For example, the limit current range includes less than the positive limit current and greater than the negative limit current.

[0046] In some embodiments, if the current source meter configuration mode is the current source mode, the source meter will control the output current in the current source mode to be the target output current. At this time, the current loop algorithm plays a controlling role and measures the voltage of the load to control the output voltage in the current source mode within the limit current range. At this time, the voltage loop algorithm plays a controlling role. The specific control process can refer to the above voltage source mode and will not be elaborated here.

[0047] As can be seen from the above, whether in the voltage source mode or in the current source mode, the voltage output of the source meter will be controlled based on the voltage loop algorithm, and the current output of the source meter will be controlled based on the current loop algorithm, so that both the current output and the voltage output of the source meter meet the output requirements.

[0048] After the source meter configuration mode is switched, it is necessary to configure the switched source meter configuration mode based on the measured voltage value and the measured current value of the current circuit, so that the switched source meter configuration mode can maintain the measured voltage value and the measured current value of the current circuit.

[0049] In some embodiments, if the source meter configuration mode after switching is the current source mode, configure the current output value of the current source mode as the current value measured by the current circuit in the voltage source mode, so that the current value measured by the current circuit is output in the current source mode, thereby maintaining the current value measured by the current circuit and avoiding current mutations caused by load changes. And configure the voltage limit value of the current source mode to include the voltage value measured by the current circuit in the voltage source mode. For example, when the voltage value measured by the current circuit is negative, the voltage limit value of the current source mode at least includes this negative value, and may also include the positive value corresponding to the voltage value measured by the current circuit, so that the limited voltage in the current source mode is the voltage value measured by the current circuit, avoiding voltage mutations caused by load changes.

[0050] In some embodiments, if the source meter configuration mode after switching is the voltage source mode, configure the voltage output value of the voltage source mode as the voltage value measured by the current circuit in the current source mode, and configure the current limit value of the voltage source mode to include the current value measured by the current circuit in the current source mode. The specific configuration process can refer to the above current source mode and will not be elaborated here.

[0051] Step 130: In the source meter configuration mode after switching, switch the actual output range to the target output range.

[0052] In some embodiments, after the output of the source meter configuration mode after switching stabilizes, in the source meter configuration mode after switching, switch the actual output range to the target output range. Since when switching the output range in the current source meter configuration mode, first perform the configuration mode switching and make the source meter configuration mode after switching be able to maintain the actual current output and actual voltage output. Therefore, when switching the resistor bank corresponding to the output range, it is possible to avoid current interruption or voltage interruption caused by switching the output range, and at the same time avoid current and voltage mutations, so as to meet the switching requirements of the output range switching. Finally, switch the source meter configuration mode after switching back to the current source meter configuration mode to complete the output range switching and make the target output range effective. Among them, it is necessary to switch back the configuration mode after the source meter output reaches stability.

[0053] The above process of performing the output range switching can be regarded as the output range switching mode of the source meter, and after the source meter completes the output range switching mode, the corresponding output range switching can be completed, such as switching the actual output range to the target output range.

[0054] In some embodiments, when switching the source meter configuration mode after switching back to the current source meter configuration mode, in order to avoid current and voltage mutations caused by range changes from affecting the hardware safety, before switching back, in the source meter configuration mode after switching, switch the limited range in the source meter configuration mode after switching to match the target output range, thereby improving the hardware safety during the switching back process.

[0055] In some embodiments, in the switched source table configuration mode, it is also necessary to consider the switching order between switching the restricted range to match the target output range and switching the actual output range to the target output range. Since at the instant of switching the output range, the code word of the control output value has not been updated to the corresponding code word in the new range, that is, the code word remains unchanged. And the same code word has different outputs in different output ranges, that is, the output value represented by the same code word is larger in the small range. Therefore, if the output range changes while the code word remains unchanged, it will cause a change in the output value. For this, it is possible to first determine whether the current output range switch is from a small range to a large range, that is, a range upshift, or from a large range to a small range, that is, a range downshift, and then select the corresponding switching order to perform the restricted range switch and the output range switch.

[0056] In some embodiments, first determine the size relationship between the actual output range and the target output range. If the actual output range is less than the target output range, that is, a range upshift, then first perform the switch of the actual output range to the target output range, and then perform the switch of the restricted range in the switched source table configuration mode to match the target output range. At this time, the restricted range based on the small range can avoid the output reduction caused by the range upshift. If the actual output range is greater than the target output range, that is, a range downshift, then first perform the switch of the restricted range in the switched source table configuration mode to match the target output range, and then perform the switch of the actual output range to the target output range. At this time, the restricted range based on the large range can avoid the output increase caused by the range downshift.

[0057] In the above embodiments, taking the range upshift of the output range as an example, the process of switching the output range can be referred to in chronological order Figure 6 , that is, first perform the configuration mode switch, and then perform the target output range switch and the restricted range switch in the switched configuration mode.

[0058] The above is some descriptions of switching the output range of the source table.

[0059] In some embodiments, the source table can also perform a switch of the measurement range. Among them, in the voltage source mode, it is to perform a switch of the current measurement range, and the current measurement range corresponds to the actual current output. And in the current source mode, it is to perform a switch of the voltage measurement range, and the voltage measurement range corresponds to the actual voltage output. The following specifically describes the process of switching the measurement range.

[0060] In some embodiments, the configuration parameters can also include the maximum measurement range and the minimum measurement range. Please refer to Figure 7 , and the source table range management method can also include the following steps: Step 200: Obtain the actual measurement range in the current source table configuration mode.

[0061] In some embodiments, after obtaining the measured voltage value of the current circuit in the current source mode, the corresponding actual measurement range of the voltage can be determined according to the measured voltage value of the current circuit. In some embodiments, after obtaining the measured current value of the current circuit in the voltage source mode, the corresponding actual measurement range of the current can be determined according to the measured current value of the current circuit.

[0062] Step 210: If the actual measurement range is less than the minimum measurement range, perform a measurement range upshift measurement range switching mode to switch the measurement range of the current source meter configuration mode to the minimum measurement range.

[0063] Step 220: If the actual measurement range is greater than the maximum measurement range, perform a measurement range downshift measurement range switching mode to switch the measurement range of the current source meter configuration mode to the maximum measurement range.

[0064] In some embodiments, a measurement range upshift means switching from a small range to a large range, and conversely, a measurement range downshift means switching from a large range to a small range. In some embodiments, the measurement range switching mode is a process of switching the measurement range of the source meter. For example, after completing the measurement range switching mode, the measurement range of the current source meter configuration mode can be switched to the minimum measurement range. For example, after completing the measurement range switching mode, the measurement range of the current source meter configuration mode can be switched to the maximum measurement range. In this embodiment, when the actual measurement range is not within the range of the maximum measurement range and the minimum measurement range, the measurement range needs to be switched to the maximum measurement range or the minimum measurement range.

[0065] Step 230: If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the measured voltage value of the current circuit or the measured current value of the current circuit is greater than the maximum threshold under the actual measurement range, perform a measurement range upshift measurement range switching mode to switch the actual measurement range to the measurement range corresponding to the measured voltage value of the current circuit or the measured current value of the current circuit.

[0066] Step 240: If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the measured voltage value of the current circuit or the measured current value of the current circuit is less than the maximum threshold under the actual measurement range, perform a measurement range downshift measurement range switching mode to switch the actual measurement range to the measurement range corresponding to the measured voltage value of the current circuit or the measured current value of the current circuit.

[0067] In some embodiments, in the voltage source mode, if the measured current value of the current circuit is greater than the maximum threshold under the actual current measurement range, then an upshift of the measurement range is required. Conversely, if the measured current value of the current circuit is less than the minimum threshold under the actual current measurement range, then a downshift of the measurement range is required. Among them, if the measured current value of the current circuit is greater than the minimum threshold of a certain current measurement range and less than the maximum threshold of that certain current measurement range, then that certain current measurement range is the measurement range corresponding to the measured current value of the current circuit.

[0068] In some embodiments, in the current source mode, if the measured voltage value of the current circuit is greater than the maximum threshold under the actual voltage measurement range, then an upshift of the measurement range is required. Conversely, if the measured voltage value of the current circuit is less than the minimum threshold under the actual voltage measurement range, then a downshift of the measurement range is required. Among them, if the measured voltage value of the current circuit is greater than the minimum threshold of a certain voltage measurement range and less than the maximum threshold of that certain voltage measurement range, then that certain voltage measurement range is the measurement range corresponding to the measured voltage value of the current circuit.

[0069] In some embodiments, each level of the measurement range has a corresponding minimum threshold and maximum threshold. The maximum threshold of the current level measurement range is equal to the minimum threshold of the previous level measurement range, and the minimum threshold of the current level measurement range is equal to the maximum threshold of the next level measurement range. That is, in the current level measurement range, if the actual output is greater than the minimum threshold and less than the maximum threshold of the current level measurement range, then the actual output matches the current level measurement range, that is, the measurement accuracy is the highest in the current level measurement range. If the actual output is greater than the maximum threshold of the current level measurement range, then at least the previous level measurement range needs to be matched to ensure the measurement accuracy. If the actual output is less than the minimum threshold of the current level measurement range, then at least the next level measurement range needs to be matched to ensure the measurement accuracy.

[0070] In some embodiments, when performing a downshift of the measurement range, if a multi-level downshift of the measurement range is performed at one time, it is likely to cause the measured value read to change from a non-full value to a full value, thereby lengthening the time for the source meter to output stably. Therefore, it is necessary to perform a one-level downshift of adjacent measurement ranges. For example, first switch the actual measurement range to the adjacent lower-level measurement range. If the actual output value is still less than the minimum threshold of the lower-level measurement range, then continue to switch to the adjacent lower-level measurement range until the measurement range corresponding to the actual output value is reached.

[0071] In some embodiments, when performing an upshift of the measurement range, since the measured value read currently is already a full value, a multi-level upshift of the measurement range can be performed at one time, so as to reduce the number of switches, thereby reducing the overall switching time of the upshift of the measurement range.

[0072] In some embodiments, when performing an upshift of the measurement range, first, based on the actual measurement range and the voltage value or current value measured by the current circuit corresponding to the actual measurement range, it is determined whether the actual measurement range meets the upshift of the measurement range at a preset level, where the preset level is greater than or equal to two levels. Among them, in the current source mode, the voltage value measured by the current circuit corresponding to the actual voltage measurement range is compared with the maximum threshold of the measurement range that is greater than the actual voltage measurement range by a preset level. If the measured voltage value of the current circuit is greater than the maximum threshold, or the measured voltage value of the current circuit is less than the maximum threshold but greater than the minimum threshold of the measurement range that is greater than the actual voltage measurement range by a preset level, then the actual measurement range meets the upshift of the measurement range at the preset level. Conversely, if the measured voltage value of the current circuit is less than the maximum threshold, it does not meet the upshift of the measurement range at the preset level. In this embodiment, if too many levels of upshift of the measurement range are performed at one time, it will also cause the time for the source meter output to stabilize to be extended. Therefore, the preset level can be determined according to the actual situation. For example, the preset level is set to three levels.

[0073] In some embodiments, if the actual measurement range meets the upshift of the measurement range at the preset level, the actual measurement range is upshifted by the preset level, so that the level of the upshifted measurement range is the current level of the actual measurement range plus the preset level. In some embodiments, if the measured voltage value of the current circuit is greater than the maximum threshold of the measurement range that is greater than the actual voltage measurement range by a preset level, after performing an upshift of the measurement range at the preset level once, it can be continuously determined whether it meets the upshift of the measurement range at the preset level until it is switched to the measurement range corresponding to the actual output value.

[0074] In some embodiments, if the actual measurement range does not meet the upshift of the measurement range at the preset level. It can be determined whether the actual measurement range meets the upshift of the measurement range at a level one less than the preset level. If it meets, the corresponding upshift of the measurement range is performed. If it does not meet, it is continuously determined whether the actual measurement range meets the upshift of the measurement range at a level two less than the preset level until it is switched to the measurement range corresponding to the actual output value, or until it is switched to the measurement range at the adjacent upper level of the actual measurement range. For example, when the preset level is three levels, first determine whether the measured current value of the current circuit meets the upshift of the current measurement range by three levels of the current measurement range, that is, compare whether the measured current value of the current circuit is greater than the maximum threshold corresponding to the upshift of the current measurement range by three levels. If it is greater than the maximum threshold, or greater than the corresponding minimum threshold and less than the maximum threshold, the current measurement range will be upshifted by three levels. If it does not meet. Then continue to compare whether the measured current value of the current circuit is greater than the maximum threshold corresponding to the upshift of the current measurement range by two levels. If the corresponding switching condition is met, the current measurement range will be upshifted by two levels. If it does not meet, the current measurement range will be upshifted by one level.

[0075] In some embodiments, when the measured voltage value or the measured current value of the current circuit becomes zero, for example, when the source meter stops outputting or the output value decreases to a level where it cannot be detected, the actual measurement range will step down level by level to the minimum measurement range. When the measured voltage value or the measured current value of the current circuit changes from zero to non-zero, it is necessary to step up from the minimum measurement range to the measurement range corresponding to the measured voltage value or the measured current value of the current circuit. Since it is necessary to step down to the minimum measurement range each time and then step up from the minimum measurement range, more switching times and more switching time are required.

[0076] In response to this, in some embodiments, a user can set a minimum preset measurement range, which is greater than the minimum measurement range and less than the maximum measurement range. When a measurement range switch is required, first obtain the actual measurement range in the current source meter configuration mode. When the measured voltage value or the measured current value of the current circuit corresponding to the actual measurement range is zero and the actual measurement range is greater than the minimum preset measurement range, the actual measurement range is switched to the minimum preset measurement range. Compared with switching to the minimum measurement range, this can reduce the number of range downcuts, thereby reducing the switching time for range downcuts. When the measured voltage value or the measured current value of the current circuit changes from zero to non-zero, it is switched from the minimum preset measurement range to the measurement range corresponding to the measured voltage value or the measured current value of the current circuit. Compared with stepping up from the minimum measurement range, this can reduce the number of range upcuts, thereby reducing the switching time for range upcuts.

[0077] The above is an explanation of the switching process for switching the measurement range. The following is an explanation of the specific implementation process for switching the measurement range.

[0078] In some embodiments, please refer to Figure 8 , the source meter range management method may further include the following steps: Step 300: Obtain the actual measurement range in the current source meter configuration mode and determine whether the actual measurement range meets the measurement range switching condition.

[0079] In some embodiments, when the measurement range of the source meter is in the automatic mode, it will be determined whether the actual current output or the actual voltage output corresponding to the actual measurement range meets the actual measurement range. If not, the actual measurement range meets the measurement range switching condition. In some embodiments, when the user sets a target measurement range, it is determined whether the target measurement range is equal to the actual measurement range. If not, the actual measurement range meets the measurement range switching condition.

[0080] Step 310: If the measurement range switching condition is met, configure the current source meter configuration mode based on the measured voltage value and the measured current value of the current circuit.

[0081] In some embodiments, if the current source meter configuration mode is the voltage source mode, the voltage output value of the voltage source mode is configured as the voltage value measured by the current circuit, and the limiting current of the voltage source mode includes the current value measured by the current circuit, for example, including the positive and negative values corresponding to the current value measured by the current circuit, so that the voltage source mode can maintain the voltage value measured by the current circuit and the current value measured by the current circuit.

[0082] In some embodiments, if the current source meter configuration mode is the current source mode, the current output value of the current source mode is configured as the current value measured by the current circuit, and the limiting voltage of the current source mode includes the voltage value measured by the current circuit, for example, including the positive and negative values corresponding to the voltage value measured by the current circuit, so that the current source mode can maintain the voltage value measured by the current circuit and the current value measured by the current circuit.

[0083] Step 320: In the current source meter configuration mode, switch the actual measurement range to the target measurement range, and switch the limiting output of the current source meter configuration mode to match the target measurement range.

[0084] In some embodiments, the target measurement range can be a switching range set by the user, or a measurement range reached by performing one up-range switching, or a measurement range reached by performing one down-range switching.

[0085] In some embodiments, first judge the magnitude relationship between the actual measurement range and the target measurement range. If the actual measurement range is less than the target measurement range, that is, up-range switching, first perform switching the actual measurement range to the target measurement range, and then perform switching the limiting output of the current source meter configuration mode to match the target measurement range after the output is stable. At this time, based on the smaller limiting output, it is possible to avoid exceeding the limiting output caused by up-range switching. If the actual measurement range is greater than the target measurement range, that is, down-range switching, first perform switching the limiting output of the current source meter configuration mode to match the target measurement range, and then perform switching the actual measurement range to the target measurement range after the output is stable. At this time, based on the larger limiting output, it is possible to avoid exceeding the limiting output caused by down-range switching.

[0086] The above process of performing measurement range switching can be regarded as the measurement range switching mode of the source meter, and after the source meter completes the measurement range switching mode, the corresponding measurement range switching can be completed, such as switching the actual measurement range to the target measurement range.

[0087] In some embodiments, a computer program product is provided, including a computer program and / or instructions, and when the computer program and / or instructions are executed by a processor, the above source meter range management method is implemented.

[0088] Those skilled in the art can understand that all or part of the functions of the various methods in the above embodiments can be implemented in a hardware manner or in a computer program manner. When all or part of the functions in the above embodiments are implemented in a computer program manner, the program can be stored in a computer-readable storage medium. The storage medium can include: read-only memory, random access memory, magnetic disks, optical disks, hard disks, etc. The above functions can be achieved by a computer executing this program. For example, the program is stored in the memory of the device, and when the processor executes the program in the memory, the above-mentioned all or part of the functions can be achieved. In addition, when all or part of the functions in the above embodiments are implemented in a computer program manner, the program can also be stored in a storage medium such as a server, another computer, magnetic disk, optical disk, flash drive or mobile hard disk, and saved to the memory of the local device by downloading or copying, or the system of the local device is updated with a version. When the processor executes the program in the memory, all or part of the functions in the above embodiments can be achieved.

[0089] The above uses specific examples to elaborate on the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the technical field to which the present application pertains, several simple deductions, deformations or substitutions can also be made according to the idea of the present application.

Claims

1. A source meter range management method, characterized in that Including: Obtain configuration parameters, where the configuration parameters include a target output range; Obtain the current source meter configuration mode, and obtain the actual output range, the measured voltage value of the current circuit, and the measured current value of the current circuit in the current source meter configuration mode; wherein, the source meter configuration mode includes a voltage source mode and a current source mode; Perform an output range switching mode: switch the current source meter configuration mode to obtain a switched source meter configuration mode, and configure the switched source meter configuration mode based on the measured voltage value of the current circuit and the measured current value of the current circuit, so that the switched source meter configuration mode can maintain the measured voltage value of the current circuit and the measured current value of the current circuit; wherein, if the current source meter configuration mode is the voltage source mode, the switched source meter configuration mode is the current source mode; if the current source meter configuration mode is the current source mode, the switched source meter configuration mode is the voltage source mode; In the switched source meter configuration mode, switch the actual output range to the target output range; Switch the switched source meter configuration mode back to the current source meter configuration mode to complete the output range switching mode and make the target output range effective.

2. The source table range management method according to claim 1, characterized in that Configuring the switched source meter configuration mode based on the measured voltage value of the current circuit and the measured current value of the current circuit includes: If the switched source meter configuration mode is the current source mode, configure the current output value of the current source mode as the measured current value of the current circuit in the voltage source mode before switching, and configure the voltage limit value of the current source mode to include the measured voltage value of the current circuit in the voltage source mode before switching; If the switched source meter configuration mode is the voltage source mode, configure the voltage output value of the voltage source mode as the measured voltage value of the current circuit in the current source mode before switching, and configure the current limit value of the voltage source mode to include the measured current value of the current circuit in the current source mode before switching.

3. The source table range management method according to claim 1, wherein, Before switching the switched source meter configuration mode back to the current source meter configuration mode, it further includes: In the switched source meter configuration mode, switch the limit range in the switched source meter configuration mode to match the target output range.

4. The source table range management method according to claim 3, wherein, It also includes: Judge the magnitude relationship between the actual output range and the target output range; If the actual output range is less than the target output range, first switch the actual output range to the target output range, and then switch the limit range in the switched source meter configuration mode to match the target output range; If the actual output range is greater than the target output range, first switch the limit range in the switched source meter configuration mode to match the target output range, and then switch the actual output range to the target output range.

5. The source table range management method according to claim 1, wherein, It also includes: Obtain the actual measurement range in the current source meter configuration mode, and judge whether the actual measurement range meets the measurement range switching condition; If the measurement range switching condition is satisfied, perform the measurement range switching mode based on the target measurement range: Configure the current source meter configuration mode based on the voltage value measured by the current circuit and the current value measured by the current circuit, so that the current source meter configuration mode can maintain the voltage value measured by the current circuit and the current value measured by the current circuit; In the current source meter configuration mode, switch the actual measurement range to the target measurement range, and switch the limit output of the current source meter configuration mode to match the target measurement range to complete the measurement range switching mode and make the target measurement range effective.

6. The source table range management method according to claim 1, characterized in that The configuration parameters further include the maximum measurement range and the minimum measurement range, and the source meter range management method further includes: Obtain the actual measurement range in the current source meter configuration mode; If the actual measurement range is less than the minimum measurement range, perform the measurement range switching mode of upward measurement range switching to switch the measurement range of the current source meter configuration mode to the minimum measurement range; If the actual measurement range is greater than the maximum measurement range, perform the measurement range switching mode of downward measurement range switching to switch the measurement range of the current source meter configuration mode to the maximum measurement range; If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the voltage value measured by the current circuit or the current value measured by the current circuit is greater than the maximum threshold value under the actual measurement range, perform the measurement range switching mode of upward measurement range switching to switch the actual measurement range to the measurement range corresponding to the voltage value measured by the current circuit or the current value measured by the current circuit; If the actual measurement range is within the range of the minimum measurement range and the maximum measurement range, and the voltage value measured by the current circuit or the current value measured by the current circuit is less than the maximum threshold value under the actual measurement range, perform the measurement range switching mode of downward measurement range switching to switch the actual measurement range to the measurement range corresponding to the voltage value measured by the current circuit or the current value measured by the current circuit.

7. The source table range management method according to claim 6, characterized in that, The measurement range switching mode of upward measurement range switching includes: Based on the actual measurement range and the voltage value measured by the current circuit or the current value measured by the current circuit corresponding to the actual measurement range, determine whether the actual measurement range meets the measurement range upward cut of a preset level, and the preset level is greater than or equal to two levels; If the measurement range upward cut of the preset level is satisfied, perform the measurement range upward cut of the preset level on the actual measurement range, so that the level of the measurement range after the upward cut is the current level of the actual measurement range plus the preset level.

8. The source table range management method according to claim 1, wherein, The configuration parameters further include the minimum preset measurement range, the minimum preset measurement range is greater than the minimum measurement range and less than the maximum measurement range, and the source meter range management method further includes: Obtain the actual measurement range in the current source meter configuration mode; When the measured voltage value or the measured current value of the current circuit corresponding to the actual measurement range is zero, and the actual measurement range is greater than the minimum preset measurement range, switch the actual measurement range to the minimum preset measurement range; and / or When the measured voltage value or the measured current value of the current circuit changes from zero to non-zero, switch from the minimum preset measurement range to the measurement range corresponding to the measured voltage value or the measured current value of the current circuit.

9. A source meter, characterized in that, Comprising: A source output module for performing voltage output and current output; A current measurement module for measuring the current of the load; A voltage measurement module for measuring the voltage of the load; A processor for implementing the method according to any one of claims 1-8 when the computer program and / or instructions are executed by the processor.

10. A computer program product, comprising a computer program and / or instructions, characterized in that, The computer program and / or instructions implement the method according to any one of claims 1-8 when executed by the processor.

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