CN116185784A - Calibration device, calibration system and acquisition system - Google Patents

Abstract

The application discloses calibration device, calibration system and acquisition system belongs to the computer technology field. The calibration device comprises a voltage output module and at least one calibration module; the output end of each calibration module is connected with at least one detection channel of n detection channels in the acquisition device; the voltage output module outputs a first voltage to each calibration module, each calibration module outputs a second voltage and a third voltage to a connected detection channel when the first voltage is input, each detection channel is used for detecting a target current value according to the second voltage input by the detection channel and detecting a target voltage value according to the third voltage input by the calibration module, a current calibration parameter corresponding to each detection channel is determined according to a theoretical current value and a target current value, and a voltage calibration parameter corresponding to each detection channel is determined according to the theoretical voltage value and the target voltage value. The detection precision of the detection device can be improved.

Description

Calibration device, calibration system and acquisition system

technical field

The present application relates to the field of computer technology, in particular to a calibration device, a calibration system and an acquisition system.

Background technique

With the rapid development of computer technology, electronic devices have more and more functions and more and more application scenarios. In order to improve the battery life experience of electronic devices, it is particularly important to evaluate the power consumption of electronic devices. Currently, a collection device can be used to collect the current and voltage of a load in an electronic device, so as to determine the corresponding power consumption accordingly. However, due to manufacturing influences, there will inevitably be deviations between the theoretical value and the detected value of the acquisition device, resulting in a decrease in the detection accuracy of the acquisition device. Therefore, there is an urgent need for a calibration device to calibrate the acquisition device, so as to improve the detection accuracy of the acquisition device.

Contents of the invention

The application provides a calibration device, a calibration system and an acquisition system, which can improve the detection accuracy of the acquisition device. Described technical scheme is as follows:

In a first aspect, a calibration device is provided, and the calibration device includes: a voltage output module and at least one calibration module.

The output terminal of the voltage output module is connected to the input terminal of each calibration module in the at least one calibration module, and the output terminal of each calibration module in the at least one calibration module is used to connect with at least one detection channel in the n detection channels in the acquisition device , n is an integer greater than or equal to 2.

The voltage output module is used to output the first voltage to each calibration module in the at least one calibration module, and each calibration module in the at least one calibration module outputs the second voltage and The third voltage, each detection channel in the n detection channels is used to detect the target current value according to the second voltage input by the connected detection channel and the third voltage detection target voltage value according to the connected calibration module input, each The current calibration parameters corresponding to the detection channels are determined according to the theoretical current value and the target current value, and the voltage calibration parameters corresponding to each detection channel are determined according to the theoretical voltage value and the target voltage value.

Optionally, the calibration device and the acquisition device are used for connection through a board-to-board connector.

In this application, since the circuit structure of each calibration module in at least one calibration module is known in advance, so in the case that the voltage output module outputs the first voltage to each calibration module in at least one calibration module, it can be known in advance that at least A theoretical current value and a theoretical voltage value expected to be detected by each calibration module in a calibration module by the connected detection channel. For any detection channel among the n detection channels, what this detection channel actually obtains after detecting the connected calibration module is a target current value and a target voltage value. In this case, according to the theoretical current value corresponding to the calibration module connected to the detection channel and the target current value actually detected by the detection channel, the current calibration parameters corresponding to the detection channel can be determined, and, according to the detection channel The theoretical voltage value corresponding to the connected calibration module and the target voltage value actually detected by this detection channel can determine the voltage calibration parameters corresponding to this detection channel, so that a set of calibration parameters corresponding to this detection channel can be obtained. A set of calibration parameters corresponding to this detection channel is used to calibrate the actual detection value of this detection channel to a theoretical value, that is, the current calibration parameters corresponding to this detection channel are used to calibrate the current value actually detected by this detection channel to a value close to Or equal to the theoretical current value, and calibrate the actual detected voltage value of this detection channel to be close to or equal to the theoretical voltage value. Since the calibrated detection value is close to or equal to the theoretical value, the detection accuracy of the acquisition device can be effectively improved.

Optionally, the voltage output module includes a reference voltage source, a second processing unit and a digital-to-analog converter DAC. The two output terminals of the reference voltage source are connected to the two reference voltage terminals of the DAC one by one, the output terminal of the second processing unit is connected to the input terminal of the DAC, and the output terminal of the DAC is connected to the input of each calibration module in at least one calibration module end connection.

The reference voltage source is a power supply for outputting two reference voltages. One of the two reference voltages is the maximum value of the preset voltage range, and the other reference voltage is the minimum value of the preset voltage range. Under the action of the two reference voltages output by the reference voltage source, the DAC can output the required voltage stably and accurately.

When the acquisition device needs to be calibrated, the second processing unit may output the digital value of the first voltage (ie, the digital voltage) to the DAC. The DAC can convert the digital voltage into an analog voltage (that is, the analog value of the first voltage) according to the two reference voltages input by the reference voltage source, and the analog voltage is within a preset voltage range. The DAC can then output the analog voltage to each of the at least one calibration module.

Optionally, the voltage output module further includes two first voltage followers, and one of the two first voltage followers is connected between an output terminal of the reference voltage source and a reference voltage terminal of the DAC , another first voltage follower is connected between the other output end of the reference voltage source and the other reference voltage end of the DAC.

Since the input impedance of the voltage follower is approximately infinite and the output impedance is extremely small, it can function as an isolation buffer. Therefore, the two first voltage followers can make the two reference voltages output from the reference voltage source to the DAC more stable.

Optionally, any calibration module in at least one calibration module includes a second resistor and a third resistor, the first end of the second resistor is connected to the output end of the voltage output module, and the second end of the second resistor is connected to the third resistor The first end of the third resistor is connected to the ground wire, and the two ends of the second resistor are used to connect to at least one detection channel in the n detection channels.

In this case, the voltage of the second resistor is the above-mentioned second voltage, the voltage of the third resistor is the above-mentioned third voltage, and the resistance values of the second resistor and the third resistor are known. Since the resistance value of the second resistor and the resistance value of the third resistor are known, in the case of predicting the first voltage output from the voltage output module to the second resistor, the real current value of the second resistor (that is, the theoretical current value) and the real voltage value (that is, theoretical voltage value) of the third resistor, which predicts the theoretical current value and theoretical voltage value corresponding to each detection channel in the n detection channels.

Optionally, a calibration module further includes a second voltage follower, and the second voltage follower is connected between the output terminal of the voltage output module and the first terminal of the second resistor to ensure the accuracy of the first voltage output by the voltage output module. stability.

Optionally, the calibration device further includes a third voltage follower, and the third voltage follower is connected between the output terminal of the voltage output module and the input terminal of each calibration module in at least one calibration module, so as to improve the voltage output module. carrying capacity.

In a second aspect, a calibration system is provided, and the calibration system includes a calibration device, an acquisition device, and electronic equipment.

The calibration device includes a voltage output module and at least one calibration module, and the acquisition device includes n detection channels and a first processing unit, where n is a positive integer greater than or equal to 2. The output terminal of the voltage output module is connected to the input terminal of each calibration module in the at least one calibration module; the output terminal of each calibration module in the at least one calibration module is connected to at least one detection channel in the n detection channels; the first processing unit The n acquisition ends of the n detectors are connected to n detection channels one by one. The voltage output module is used to output the first voltage to each calibration module in the at least one calibration module; each calibration module in the at least one calibration module outputs the second voltage and third voltage. Each of the n detection channels is used to detect the target current value according to the second voltage input by the connected detection channel and detect the target voltage value according to the third voltage input by the connected calibration module; the first processing unit is used for The target current value and the target voltage value detected by each detection channel are obtained, and the target current value and the target voltage value are sent to the electronic device. The electronic device is used to determine the current calibration parameters corresponding to each detection channel according to the theoretical current value and the target current value, and determine the voltage calibration parameters corresponding to each detection channel according to the theoretical voltage value and the target voltage value, so as to obtain the n detection channel There are n sets of calibration parameters in one-to-one correspondence, and each set of calibration parameters in the n sets of calibration parameters includes current calibration parameters and voltage calibration parameters.

In this application, since the circuit structure of each calibration module in at least one calibration module is known in advance, so in the case that the voltage output module outputs the first voltage to each calibration module in at least one calibration module, it can be known in advance that at least A theoretical current value and a theoretical voltage value expected to be detected by each calibration module in a calibration module by the connected detection channel. For any detection channel among the n detection channels, what this detection channel actually obtains after detecting the connected calibration module is a target current value and a target voltage value. In this case, according to the theoretical current value corresponding to the calibration module connected to the detection channel and the target current value actually detected by the detection channel, the current calibration parameters corresponding to the detection channel can be determined, and, according to the detection channel The theoretical voltage value corresponding to the connected calibration module and the target voltage value actually detected by this detection channel can determine the voltage calibration parameters corresponding to this detection channel, so that a set of calibration parameters corresponding to this detection channel can be obtained. A set of calibration parameters corresponding to this detection channel is used to calibrate the actual detection value of this detection channel to a theoretical value, that is, the current calibration parameters corresponding to this detection channel are used to calibrate the current value actually detected by this detection channel to a value close to Or equal to the theoretical current value, and calibrate the actual detected voltage value of this detection channel to be close to or equal to the theoretical voltage value. Since the calibrated detection value is close to or equal to the theoretical value, the detection accuracy of the acquisition device can be effectively improved.

Optionally, the electronic device is used to send a calibration instruction to the voltage output module; the voltage output module is used to set the first voltage to Outputting the first voltage to each calibration module in at least one calibration module is the minimum value of the preset voltage range; when it is determined that the calibration instruction currently received is not the first calibration instruction received during this calibration process Next, if it is determined that the first voltage is less than the maximum value of the preset voltage range, the first voltage is increased by the preset voltage, and the first voltage is output to each calibration module in at least one calibration module, if it is determined that the first voltage is equal to the preset voltage If the maximum value of the voltage range is set, the calibration process ends.

In this application, the electronic device can send multiple calibration instructions to the voltage output module. Each time the electronic device sends a calibration command to the voltage output module, after receiving the target current value and target voltage value sent by the first processing unit, for any one of the n detection channels, the electronic device will obtain the detection channel corresponding to A set of calibration current values, this set of calibration current values includes theoretical current values and target current values, and the electronic device will obtain a set of calibration voltage values corresponding to this detection channel, this set of calibration voltage values includes theoretical voltage values and target voltage values .

Optionally, the electronic device is configured to, for any one of the n detection channels after the calibration process ends, determine a The current calibration parameters corresponding to the detection channel, each set of calibration current values in multiple sets of calibration current values include theoretical current values and target current values, and are determined according to multiple sets of calibration voltage values corresponding to one detection channel obtained during this calibration process A voltage calibration parameter corresponding to a detection channel, and each set of calibration voltage values in multiple sets of calibration voltage values includes a theoretical voltage value and a target voltage value. In this way, a set of calibration parameters corresponding to each of the n detection channels can be obtained, which can meet the multi-channel calibration requirements.

Optionally, the electronic device is configured to send n sets of calibration parameters to the first processing unit for storage.

Optionally, the electronic device is used to: generate a data packet carrying n sets of calibration parameters; acquire the remaining size of the buffer space of the first processing unit; if the size of the data packet is less than or equal to the remaining size of the buffer space, send the data packet to The first processing unit; if the size of the data packet is greater than the remaining size of the buffer space, a new data packet is generated according to at least one set of calibration parameters in the data packet, the size of the newly generated data packet is less than or equal to the remaining size of the buffer space, and the new data packet is generated The generated data packet is sent to the first processing unit; if there is one or more sets of calibration parameters that have not been sent to the first processing unit in the n sets of calibration parameters, then generate a data packet carrying one or more sets of calibration parameters, and re- The step of obtaining the remaining size of the cache space of the first processing unit and subsequent steps are performed until all the n sets of calibration parameters are sent to the first processing unit.

In this application, a buffer space adaptive method is provided, which adjusts the size of the data packet carrying the calibration parameters to be delivered by monitoring the remaining size of the buffer space of the first processing unit in real time, thereby ensuring that the first processing unit The normal operation of the system can also reduce the resource consumption of the acquisition device.

In a third aspect, a collection system is provided. The collection system includes electronic equipment and multiple collection devices, and the electronic device is connected to the multiple collection devices.

The plurality of acquisition devices are all acquisition devices calibrated by the calibration device described in the first aspect above, and each acquisition device in the plurality of acquisition devices stores the current calibration parameters corresponding to each detection channel in its own n detection channels And voltage calibration parameters, data acquisition is synchronized when multiple acquisition devices are working. Any two acquisition devices among the multiple acquisition devices are used to collect current and voltage data of different objects or to collect current and voltage data of the same object; each of the multiple acquisition devices uses current calibration parameters and voltage calibration parameters to adjust the current The voltage data is then calibrated and sent to the electronics.

According to this, the electronic device can realize the confirmation of the power consumption of more loads of the same object, or can realize the confirmation of the power consumption of loads of different objects. In this way, the acquisition system can realize the power consumption measurement of more channels through the extended use of multiple acquisition devices, and has considerable flexibility.

Optionally, the electronic device is connected to multiple acquisition devices through a USB interface extender.

In some embodiments, the electronic device can be connected to multiple acquisition devices through a USB interface extender, and the multiple acquisition devices are all connected to an object, so as to collect the current and voltage data of the object. Moreover, the electronic device can also be connected to other multiple acquisition devices through another USB interface expander, and these multiple acquisition devices can be connected to another object. In this way, the electronic device can implement power consumption measurement for multiple objects through multiple USB interface extenders.

In other embodiments, the electronic device can be connected to multiple acquisition devices through a USB interface extender, and the multiple acquisition devices can be connected to different objects to collect current and voltage data of different objects. In this way, the electronic device can implement power consumption measurement for multiple objects through a USB interface extender.

Optionally, after the multiple collection devices are connected to the electronic device, the specified pins of each collection device in the multiple collection devices are connected to the same node. The electronic equipment is used to: when it is recognized that there is a collection device connected, if it is determined that the number of currently connected collection devices is greater than or equal to 2, then the first connected collection device is determined to be the master device, and the first connected collection device is determined to be the master device. The device sends an indication message. The first connected acquisition device is used to determine itself as the master device after receiving the indication message, and pull up the level of its designated pin to generate a synchronous pulse signal. Other acquisition devices are used to: if it detects that the level of its designated pin is pulled high, it determines itself as a slave device, and performs data acquisition according to the synchronization pulse signal generated on its designated pin.

In this application, the master-slave logic control function is designed. The electronic equipment will define the master-slave devices in multiple acquisition devices according to the identification order of the acquisition devices. The master acquisition device will generate synchronous pulse signals, and all detection channels of multiple acquisition devices Data collection and transmission will be carried out under the control of the synchronous pulse signal.

In a fourth aspect, an electronic device is provided, the structure of the electronic device includes a processor and a memory, and the memory is used to store a program that supports the electronic device to perform the operations performed by the electronic device in the above aspect, and stores a program for Data involved in implementing the operations performed by the electronic device in the above aspect. The processor is configured to execute programs stored in the memory. The electronic device may also include a communication bus for establishing a connection between the processor and the memory.

In a fifth aspect, a computer-readable storage medium is provided, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, it causes the computer to perform the operations performed by the electronic device in the above aspect.

In a sixth aspect, there is provided a computer program product including instructions, which, when run on a computer, cause the computer to perform the operations performed by the electronic device in the above aspect.

Description of drawings

FIG. 1 is a schematic structural diagram of an acquisition device 100 provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of the connection between the first collection device 100 and the target object 200 provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of the connection between the second collection device 100 and the target object 200 provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of communication between the first collection device 100 and the electronic device 300 provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of communication between the second collection device 100 and the electronic device 300 provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a first calibration device 400 provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a second calibration device 400 provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a third calibration device 400 provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a fourth calibration device 400 provided in an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a fifth calibration device 400 provided in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a sixth calibration device 400 provided in an embodiment of the present application;

Fig. 12 is a schematic diagram of a calibration system provided by an embodiment of the present application;

FIG. 13 is a schematic diagram of a calibration process of an acquisition device 100 provided in an embodiment of the present application;

FIG. 14 is a schematic diagram of a cache space adaptive manner provided by an embodiment of the present application;

FIG. 15 is a schematic diagram of the working process of an acquisition device 100 provided by an embodiment of the present application;

Fig. 16 is a schematic diagram of an acquisition system provided by an embodiment of the present application;

Fig. 17 is a schematic diagram of a synchronous pulse signal provided by an embodiment of the present application;

Fig. 18 is a schematic diagram of a master-slave logic control function provided by the embodiment of the present application;

FIG. 19 is a schematic structural diagram of an electronic device 300 provided in an embodiment of the present application;

FIG. 20 is a schematic diagram of a software system of an electronic device 300 provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manner of the present application will be further described in detail below in conjunction with the accompanying drawings.

It should be understood that the "plurality" mentioned in this application means two or more. In the description of this application, unless otherwise specified, "/" means or means, for example, A/B can mean A or B; "and/or" in this article is just a description of the relationship between associated objects, It means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to clearly describe the technical solution of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

Phrases such as "one embodiment" or "some embodiments" described in this application mean that a particular feature, structure, or characteristic described by the embodiment is included in one or more embodiments of the present application. Thus, appearances of "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this application are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. In addition, the terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless specifically stated otherwise.

The application scenarios involved in the embodiments of the present application are described below.

With the rapid development of computer technology, electronic devices have more and more functions and more and more application scenarios. In order to improve the battery life experience of electronic devices, it is particularly important to evaluate the power consumption of electronic devices. For example, in some application scenarios, with the in-depth development of the Internet of Things, more and more battery-powered terminals have begun to appear. Various devices based on Bluetooth (BT), wireless fidelity (Wi-Fi), Terminals of communication technologies such as long range (LoRa), narrow band internet of things (NB-IoT), and the 4th generation mobile communication technology (4G) need to be deployed in places that cannot supply power. location, which leads to battery power supply as the only option. In this case, it is very important to evaluate the power consumption of these terminals during the research and development stage. In other application scenarios, more and more wearable devices have penetrated into people's daily life. Wearable devices such as Bluetooth headsets, Bluetooth bracelets, smart watches, temperature detectors, blood pressure monitors, and blood glucose monitors are all There are strict requirements on power consumption.

Low power consumption is a key performance indicator for devices such as mobile phones, personal computers (PCs), and tablets. The characteristics of the low power consumption test mainly include the following four points: 1. The current is small: the battery with a small capacity needs to compare the power consumption in order to achieve a long battery life, which requires that the equipment used for the power consumption test has enough small current Resolving power, uA (microampere) is the basic requirement. 2. Large dynamic range: when many products are in sleep, the current can reach the uA level, but once woken up, the current will quickly rise to tens of mA (milliampere) or even A (ampere) level, which needs to be used for power consumption testing The device can accommodate transient changes in current from close to 0 to several A, and can maintain sufficient accuracy. 3. Large number of channels: When testing the power consumption of a product, it is not only necessary to pay attention to the power consumption performance of the whole machine, but also to pay attention to the power consumption performance of various loads. Through detailed power consumption splitting, the power consumption of the whole machine can be grasped. consumption distribution, and then find a suitable optimization strategy to achieve the purpose of increasing battery life. 4. It is necessary to record the V-I-P (voltage-current-power) characteristic curve: it is best to record the operating current and voltage changes according to actual needs, so as to facilitate hardware and software debugging (debug), or analysis and research.

Considering the above four requirements, the embodiment of the present application provides a power consumption detection solution that supports multi-channel, high-precision detection and value recording. The power consumption detection solution provided in the embodiment of the present application can be applied to detect the power consumption of the product under development in the product development stage, and can also be applied to the power consumption detection of the released product, which is not limited in the embodiment of the present application.

The power consumption detection solution provided in the embodiment of the present application can be implemented by means of acquisition devices, calibration devices and electronic devices.

The acquisition device provided by the embodiment of the present application is explained in detail below.

FIG. 1 is a schematic structural diagram of an acquisition device 100 provided by an embodiment of the present application. Referring to FIG. 1 , an acquisition device 100 includes a first processing unit 102 and n detection channels 101 . n is an integer greater than or equal to 2, for example, n may be 50. It should be noted that, in FIG. 1, the collection device 100 includes more than or equal to 4 detection channels 101 as an example, and FIG. 1 does not limit the number of detection channels 101 included in the collection device 100. In practical applications, , the collection device 100 may include two or more detection channels 101 .

The n detection channels 101 are used to connect with n loads C in the target object 200 one by one, so as to detect the current value and voltage value of each load C in the n loads C. The n acquisition terminals of the first processing unit 102 are connected to the n detection channels 101 one by one, so as to obtain the current value and the voltage value detected by each detection channel 101 in the n detection channels 101 .

The target object 200 is an object that requires power consumption detection. The target object 200 may be various devices, such as a mobile phone, a tablet computer, a wearable device, an augmented reality (augmented reality, AR) device, a virtual reality (virtual reality, VR) device, a notebook computer, an ultra mobile personal computer (ultra -mobile personalcomputer, UMPC), netbook, personal digital assistant (personal digital assistant, PDA), etc., which are not limited in this embodiment of the present application.

The n loads C may include various types of loads. For example, the n loads C may include a central processing unit (central processing unit, CPU), a graphics processing unit (graphics processing unit, GPU), a baseband processor, an internal memory, an external memory, a display screen, a camera, a speaker, and a communication module , a voltage conversion unit, a sensor (sensor), etc., which are not limited in this embodiment of the present application.

Optionally, referring to FIG. 2, the target object 200 includes n target modules 201, each target module 201 includes a power supply V, a first resistor R1 and a load C, and the first end of the first resistor R1 is connected to the positive pole of the power supply V, The second end of the first resistor R1 is connected to the first end of the load C, and the second end of the load C is connected to the negative pole of the power supply V and the ground wire GND. Since the first resistor R1 is connected in series with the load C, the first resistor R1 The current is the current of the load C. In this case, n target modules 201 correspond to n detection channels 101 one by one, and each detection channel 101 in the n detection channels 101 is connected to both ends of the first resistor R1 in the corresponding target module 201 . Any one of the n detection channels 101 can detect the current of the first resistor R1 (ie, the current of the load C) and the voltage of the load C.

Exemplarily, the detection channel 101 may also be called a power detector. Any one of the n detection channels 101 may include a current detection channel, a voltage detection channel and an analog-to-digital converter (analog-to-digital converter, ADC) acquisition module. The current detection channel is used to detect the current of the load C, and transmit the detected analog current to the ADC acquisition module. The ADC acquisition module can convert the analog current into a digital current (that is, the above current value), and the converted current value is stored in In the register in the ADC acquisition module. The voltage detection channel is used to detect the voltage of the load C, and transmit the detected analog voltage to the ADC acquisition module. The ADC acquisition module can convert the analog voltage into a digital voltage (that is, the above voltage value), and the converted voltage value is stored in In the register in the ADC acquisition module. In this case, the first processing unit 102 can read the voltage value and the current value from the register in the ADC acquisition module in each of the n detection channels 101 .

It should be noted that the ADC acquisition module in the embodiment of the present application can be a high-bit ADC acquisition module, and the high-bit ADC acquisition module can ensure the time resolution and accuracy of fast signals, thereby accurately capturing tiny signals. In this way, It can guarantee the ability to distinguish small currents. In addition, the ADC acquisition module in the embodiment of the present application may choose an ADC acquisition module with a larger dynamic range, so that it can adapt to a large transient change of current, and then ensure sufficient accuracy. For example, in the embodiment of the present application, through the selection of the ADC acquisition module, the current measurement accuracy can be guaranteed to be 1% of 0.5mA (ie 5uA), and the voltage measurement accuracy can be guaranteed to be 1% of 0.5V (ie 5mV).

The first processing unit 102 obtains the current value and voltage value detected by each detection channel 101 in the n detection channels 101, that is, obtains n sets of current and voltage data corresponding to the n detection channels 101 one-to-one, and each set of current and voltage The data includes a current value and a voltage value detected by a corresponding detection channel 101 , that is, each set of current and voltage data includes a current value and a voltage value of the load C detected by a corresponding detection channel 101 . The first processing unit 102 is used for processing current and voltage data. For example, the first processing unit 102 may be a field-programmable gate array (FPGA) device, and of course, the first processing unit 102 may also be other devices capable of processing current and voltage data. This is not limited. It should be noted that, in the case where the first processing unit 102 is an FPGA, the acquisition device 100 adopts a parallel acquisition scheme of the FPGA, thereby ensuring that the sampling rate does not decrease as the number of channels increases. For example, the channel sampling rate can be 7ksps (kilo samples per second, thousands of samples per second).

For example, any one of the n collection terminals of the first processing unit 102 may be an integrated circuit (inter-integrated circuit, I2C) interface. The first processing unit 102 can read the voltage value and current value from the detection channel 101 through the I2C interface. Of course, the acquisition end of the first processing unit 102 can also be other interfaces, as long as it can realize reading the voltage value and current value from the detection channel 101 .

In the embodiment of the present application, the collection device 100 can collect the current value and voltage value of each load C in the n loads C in the target object 200, that is, the collection device 100 can perform multi-channel current and voltage on the target object 200 Based on the data collection, the overall power consumption of the target object 200 and the power consumption of each load C can be confirmed subsequently, which can make the power consumption detection more accurate and flexible. In this way, through detailed power consumption splitting, technicians can grasp the power consumption distribution of the whole machine, so that they can find a suitable optimization strategy to achieve the purpose of increasing battery life.

The overall power consumption of the target object 200 is the sum of the power consumption of n loads C in the target object 200 . For example, the power consumption of any load C may be the power of the load C, that is, the power consumption of the load C may be obtained by multiplying the current value of the load C by the voltage value. Alternatively, the power consumption of any load C can be the electric energy used by the load C within a preset time period (such as 10 seconds, 30 seconds or 60 seconds), that is, the current value of the load C can be multiplied by the voltage value and then Multiply by the preset duration to get the power consumption of this load C.

It should be noted that, when the acquisition device 100 needs to be used for power consumption detection, the acquisition device 100 can be connected with the target object 200 . After the acquisition device 100 is connected to the target object 200, the n detection channels 101 in the acquisition device 100 are connected to the n loads C in the target object 200 one by one, so that the acquisition device 100 can detect n loads C in the target object 200 The current value and voltage value of each load C in the load C. For example, as shown in FIG. 3, the acquisition device 100 and the target object 200 can be connected through a BTB connector (also called a board-to-board connector). Of course, the acquisition device 100 and the target object 200 can also be connected through other connectors The connection is performed, which is not limited in this embodiment of the present application.

Optionally, the first processing unit 102 can configure each detection channel 101 among the n detection channels 101 , for example, it can implement functions such as sampling rate configuration and sampling resistance parameter configuration of each detection channel 101 . For example, the first processing unit 102 may obtain channel configuration parameters, and then configure each detection channel 101 according to the channel configuration parameters, specifically, the channel configuration parameters may be sent to each detection channel 101, so that each detection channel 101 performs Configuration, such as configuring sampling rate, sampling resistance parameters, etc. Optionally, the channel configuration parameter may be sent to the first processing unit 102 by other devices, and optionally, the channel configuration parameter may be preset by a technician.

In some embodiments, referring to FIG. 4 , after acquiring n sets of current and voltage data, the first processing unit 102 may send the n sets of current and voltage data to the electronic device 300 . Optionally, referring to FIG. 4 , the acquisition device 100 includes an interface chip 103, and the first processing unit 102 can send the n sets of current and voltage data to the electronic device 300 through the interface chip 103. For example, the interface chip 103 can be a universal serial A universal serial bus (universal serial bus, USB) interface chip (integrated circuit, IC), such as a USB2.0 interface chip. Further, referring to FIG. 4 , the acquisition device 100 may also include a transmission interface 104 (including but not limited to a Type-c interface), and the first processing unit 102 may send the n sets of current and voltage data to the electronic device 300 .

The electronic device 300 is a host computer, which can determine the corresponding power consumption according to the current and voltage data. For example, after receiving n sets of current and voltage data sent by the collection device 100 , the electronic device 300 can confirm the overall power consumption of the target object 200 and the power consumption of each load C in the target object 200 according to the n sets of current and voltage data.

Optionally, referring to FIG. 5 , driver software and interface software may be installed in the electronic device 300 . Wherein, after the driver software obtains the n sets of current and voltage data sent by the acquisition device 100, it can perform data processing on the n sets of current and voltage data, such as filter processing, calibration processing, power consumption confirmation, or other extended processing, etc., which are not limited in this embodiment of the present application. After the driving software performs data processing on the n sets of current and voltage data, it can report the data processing results to the interface software. The interface software can display the data according to the data processing results. For example, the interface software can display the V-I-P characteristic curve, so that technicians can know the changes of voltage, current and power in time. In some embodiments, the interface software can also perform relevant mathematical calculations on the data processing results, for example, can calculate the average value of the V-I-P characteristic curve and the like. Optionally, the interface software can also have function buttons, which can be used to implement operations such as zooming, for example, the displayed V-I-P characteristic curve can be zoomed in or out. In this way, it is convenient for technicians to perform hardware and software troubleshooting, analysis and research according to the data processing results of the driver software and the data display of the interface software.

Optionally, the driver software can also set the channel configuration parameters of each detection channel 101 in the acquisition device 100, and send the channel configuration parameters to the first processing unit 102 in the acquisition device 100, and the first processing unit 102 can use the The configuration parameters configure each detection channel 101 .

It should be noted that due to manufacturing reasons, most components are produced with errors, for example, there may be deviations between the theoretical value and the detected value of the detection channel 101 . In this case, in order to improve the detection accuracy of the acquisition device 100 , the current value and voltage value detected by the detection channel 101 may be calibrated. Specifically, referring to FIG. 1 to FIG. 5 , the acquisition device 100 may also include a memory 105, and the memory 105 stores n sets of calibration parameters corresponding to the n detection channels 101 one-to-one, and each set of calibration parameters in the n sets of calibration parameters includes Current calibration parameters and voltage calibration parameters. For any detection channel 101 among the n detection channels 101, after the first processing unit 102 obtains the current value and voltage value detected by the detection channel 101, it can obtain a group of corresponding detection channels 101 from the memory 105 calibration parameters, and then use the current calibration parameters in this set of calibration parameters to calibrate the current value detected by the detection channel 101, and use the voltage calibration parameters in this set of calibration parameters to calibrate the voltage value detected by the detection channel 101 , sending the calibrated current value and voltage value to the electronic device 300 as a set of current and voltage data. In this way, high-precision detection can be ensured.

For example, the memory 105 may be a flash memory (also called a flash memory), and of course, the memory 105 may also be other types of memory, which is not limited in this embodiment of the present application. Optionally, data transmission may be performed between the memory 105 and the first processing unit 102 through a serial peripheral interface (serial peripheral interface, SPI), and of course, data transmission between the memory 105 and the first processing unit 102 may also be performed through other interfaces Data transmission is not limited in this embodiment of the application.

It should be noted that before using the acquisition device 100 to detect the power consumption of the target object 200 , the calibration device 100 may also be calibrated first to obtain the above n sets of calibration parameters.

The calibration device is explained in detail below.

FIG. 6 is a schematic structural diagram of a calibration device 400 provided by an embodiment of the present application. Referring to FIG. 6 , the calibration device 400 may include a voltage output module 401 and at least one calibration module 402 . It should be noted that in FIG. 6, the calibration device 400 includes four calibration modules 402 as an example for illustrative purposes. FIG. 6 does not limit the number of calibration modules 402 included in the calibration device 400. In practical applications, the calibration device 400 may include one or more calibration modules 402 .

The output terminal of the voltage output module 401 is connected to the input terminal of each calibration module 402 in the at least one calibration module 402 , and the output terminal of each calibration module 402 in the at least one calibration module 402 is used to connect with the acquisition device 100 . Specifically, any calibration module 402 in at least one calibration module 402 is connected to at least one detection channel 101 among the n detection channels 101 in the acquisition device 100. In this case, each detection channel 101 in the at least one detection channel 101 The channel 101 is used to detect the calibration module 402 to obtain the target current value and target voltage value.

The voltage output module 401 is used for outputting the first voltage to each calibration module 402 in at least one calibration module 402 . Each calibration module 402 in the at least one calibration module 402 is used to simulate the target module 201 in the target object 200, and each calibration module 402 in the at least one calibration module 402 supplies the connected detection channel with the input of the first voltage 101 outputs the second voltage and the third voltage. Each detection channel 101 in the n detection channels 101 is used to detect the target current value according to the second voltage input from the connected calibration module 402 and detect the target voltage value according to the third voltage input from the connected calibration module 402 . Optionally, the second voltage is a bipolar differential voltage, and the third voltage is a common-mode voltage.

Since the circuit structure of each calibration module 402 in the at least one calibration module 402 is known in advance, so in the case that the voltage output module 401 outputs the first voltage to each calibration module 402 in the at least one calibration module 402, it can be known in advance that at least Each calibration module 402 in one calibration module 402 is expected to detect a theoretical current value and a theoretical voltage value detected by the connected detection channel 101 . For any detection channel 101 among the n detection channels 101 , what this detection channel 101 actually obtains after detecting the connected calibration module 402 is a target current value and a target voltage value. In this case, the current calibration parameters corresponding to the detection channel 101 can be determined according to the theoretical current value corresponding to the calibration module 402 connected to the detection channel 101 and the target current value actually detected by the detection channel 101, and, according to The theoretical voltage value corresponding to the calibration module 402 connected to the detection channel 101 and the target voltage value actually detected by the detection channel 101 can determine the voltage calibration parameters corresponding to the detection channel 101, so that the detection channel 101 is obtained The corresponding set of calibration parameters. A set of calibration parameters corresponding to the detection channel 101 is used to calibrate the actual detection value of the detection channel 101 to a theoretical value, that is, the current calibration parameters corresponding to the detection channel 101 are used to calibrate the current actually detected by the detection channel 101 The value is calibrated to be close to or equal to the theoretical current value, and the actual detected voltage value of the detection channel 101 is calibrated to be close to or equal to the theoretical voltage value. Since the calibrated detection value is close to or equal to the theoretical value, the detection accuracy of the acquisition device 100 can be effectively improved.

Optionally, referring to FIG. 7, the voltage output module 401 may include a reference voltage source 4011, a second processing unit 4012, and a digital-to-analog converter (Digital to analog converter, DAC) 4013, and the two output terminals of the reference voltage source 4011 are It is connected to the two reference voltage terminals of the DAC 4013 , the output terminal of the second processing unit 4012 is connected to the input terminal of the DAC 4013 , and the output terminal of the DAC 4013 is connected to the input terminal of each calibration module 402 in at least one calibration module 402 .

The reference voltage source 4011 is a power supply for outputting two reference voltages. One of the two reference voltages is the maximum value of the preset voltage range, and the other reference voltage is the minimum value of the preset voltage range. For example, if the preset voltage range is -5 volts to 5 volts, then one of the two reference voltages is -5 volts, and the other reference voltage is 5 volts.

The second processing unit 4012 is a device for outputting a digital voltage. For example, the second processing unit 4012 may be a micro controller unit (micro controller unit, MCU). Of course, the second processing unit 4012 may also be other devices capable of outputting digital voltages, which is not limited in this embodiment of the present application. Optionally, the second processing unit 4012 may receive a calibration instruction sent by the electronic device 300, and then output a digital voltage to the DAC 4013 according to the calibration instruction. Wherein, the calibration instruction is used to instruct the second processing unit 4012 to calibrate the acquisition device 100 . The calibration instruction may be automatically triggered by the electronic device 300, or manually triggered by a technician in the electronic device 300, which is not limited in this embodiment of the present application.

When the acquisition device 100 needs to be calibrated, the second processing unit 4012 can output the digital quantity of the first voltage (ie, the digital voltage) to the DAC 4013 . The DAC 4013 can convert the digital voltage into an analog voltage (that is, the analog value of the first voltage) according to the two reference voltages input by the reference voltage source 4011, and the analog voltage is within a preset voltage range. Afterwards, the DAC 4013 can output the analog voltage to each calibration module 402 in the at least one calibration module 402 .

For example, the DAC 4013 in the embodiment of the present application can be a high-precision DAC, so that under the action of the two reference voltages output by the reference voltage source 4011, the DAC 4013 can output the required voltage stably and accurately.

Further, referring to FIG. 8 , the voltage output module 401 may further include two first voltage followers A1, wherein one first voltage follower A1 is connected between an output terminal of the reference voltage source 4011 and a reference voltage terminal of the DAC 4013 Between, another first voltage follower A1 is connected between the other output end of the reference voltage source 4011 and the other reference voltage end of the DAC 4013 . Since the input impedance of the voltage follower is approximately infinite and the output impedance is extremely small, it can function as an isolation buffer. Therefore, the two first voltage followers A1 can make the two reference voltages output from the reference voltage source 4011 to the DAC 4013 more efficient. Stablize.

For example, data transmission between the second processing unit 4012 and the DAC 4013 can be performed through SPI. Of course, data transmission between the second processing unit 4012 and the DAC 4013 can also be performed through other interfaces, which is not limited in this embodiment of the present application.

Optionally, referring to FIG. 9, any calibration module 402 in at least one calibration module 402 may include a second resistor R2 and a third resistor R3, the first end of the second resistor R2 is connected to the output end of the voltage output module 401, The second end of the second resistor R2 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the ground line GND. The second resistor R2 is used to simulate the first resistor R1 in the target module 201 in the target object 200 , and the third resistor R3 is used to simulate the load C in the target module 201 in the target object 200 . Both ends of the second resistor R2 are used to connect to each detection channel 101 of at least one detection channel 101 among the n detection channels 101 in the acquisition device 100 . In this case, the voltage of the second resistor R2 is the above-mentioned second voltage, the voltage of the second resistor R2 is a bipolar differential voltage, the voltage of the third resistor R3 is the above-mentioned third voltage, and the voltage of the third resistor R3 is the common mode voltage, the resistance values of the second resistor R2 and the third resistor R3 are known. Since the resistance value of the second resistor R2 and the resistance value of the third resistor R3 are known, in the case of predicting the first voltage output by the voltage output module 401 to the second resistor R2, the actual value of the second resistor R2 can be predicted. The current value (ie theoretical current value) and the real voltage value (ie theoretical voltage value) of the third resistor R3 predict the theoretical current value and theoretical voltage value corresponding to each detection channel 101 in the n detection channels 101 .

The detection channel 101 connected to both ends of the second resistor R2 can detect the current value of the second resistor R2 (ie the current value of the third resistor R3 ) and the voltage value of the third resistor R3 . Exemplarily, any one of the n detection channels 101 includes a current detection channel, a voltage detection channel and an ADC acquisition module. The current detection channel is used to detect the current of the third resistor R3, and transmit the detected analog current to the ADC acquisition module. The ADC acquisition module can convert the analog current into a digital current (that is, the above-mentioned target current value), and convert it into the target current Values are stored in registers in the ADC acquisition module. The voltage detection channel is used to detect the voltage of the third resistor R3, and transmit the detected analog voltage to the ADC acquisition module. The ADC acquisition module can convert the analog voltage into a digital voltage (that is, the above-mentioned target voltage value), and convert it into the target voltage Values are stored in registers in the ADC acquisition module. In this case, the first processing unit 102 can read the target voltage value and target current value from the register in the ADC acquisition module in the detection channel 101 .

Further, referring to FIG. 10 , any calibration module 402 of the at least one calibration module 402 may further include a second voltage follower A2. The second voltage follower A2 is connected between the output terminal of the voltage output module 401 and the first terminal of the second resistor R2 to ensure the stability of the first voltage output by the voltage output module 401 .

Optionally, referring to FIG. 11 , the calibration device 400 may further include a third voltage follower A3, and the third voltage follower A3 is connected between the output terminal of the voltage output module 401 and each calibration module 402 in at least one calibration module 402 between the input terminals to improve the load capacity of the voltage output module 401.

For example, the calibration device 400 and the acquisition device 100 may be connected through a BTB connector. Of course, the calibration device 400 and the acquisition device 100 may also be connected through other connectors, which is not limited in this embodiment of the present application.

After the calibration device 400 is connected to the collection device 100 , each calibration module 402 of at least one calibration module 402 in the calibration device 400 is connected to at least one detection channel 101 of the n detection channels 101 in the collection device 100 . In some embodiments, the n detection channels 101 in the acquisition device 100 are divided into at least one group, the number of groups of at least one group of detection channels 101 is the same as the number of at least one calibration module 402, at least one group of detection channels 101 and At least one calibration module 402 is in one-to-one correspondence. After the calibration device 400 is connected to the acquisition device 100, the output terminal of each calibration module 402 in the at least one calibration module 402 is connected to each detection channel 101 in the corresponding group of detection channels 101 Each detection channel 101 in each group of detection channels 101 in at least one group of detection channels 101 can detect a corresponding calibration module 402 to obtain a target current value and a target voltage value.

It should be noted that one calibration module 402 in the calibration device 400 can specifically be connected to several detection channels 101 , which may be obtained through prior experiments by technicians. For example, technicians can connect a calibration module 402 in the calibration device 400 to some number of detection channels 101, and use the voltage detection device to detect the calibration when the voltage output module 401 outputs the first voltage to the calibration module 402. The second voltage and the third voltage output by the module 402; if the voltage difference between the sum of the second voltage and the third voltage and the first voltage is less than or equal to the preset voltage difference, then it is determined that the calibration module 402 can at least be compatible with these Number of detection channels 101 are connected, that is, the calibration module 402 can support the number of currently connected detection channels 101; if the voltage difference between the sum of the second voltage and the third voltage and the first voltage is greater than the preset voltage difference, Then it is determined that the calibration module 402 cannot support the number of detection channels 101 currently connected. Wherein, the preset voltage difference may be set in advance, for example, the preset voltage difference may be set according to the first voltage, for example, the preset voltage difference may be one-thousandth of the first voltage. Afterwards, the technician can increase or decrease the number of detection channels 101 connected to the calibration module 402 accordingly according to whether the calibration module 402 supports the number of detection channels 101 currently connected, and then continue to control the voltage output module 401 outputs the first voltage to the calibration module 402. In this case, use a voltage detection device to detect the second voltage and the third voltage output by the calibration module 402, and then determine whether the calibration module 402 can support the currently connected The number of detection channels 101. In this way, through multiple tests, the maximum number of detection channels 101 that can be connected to the calibration module 402 can be obtained. According to the maximum number of detection channels 101 that can be connected to one calibration module 402, the n detection channels 101 in the acquisition device 100 can be divided into at least one group, and the number of detection channels 101 in each group of detection channels 101 is less than or equal to one The maximum number of detection channels 101 that can be connected to the calibration module 402 .

It should be noted that, the calibration process of the acquisition device 100 can be completed through a calibration system. Fig. 12 is a schematic diagram of a calibration system provided by an embodiment of the present application. Referring to FIG. 12 , the calibration system may include a calibration device 400 , an acquisition device 100 and an electronic device 300 . When the acquisition device 100 needs to be calibrated, the calibration device 400 is connected to the acquisition device 100 , and the acquisition device 100 can communicate with the electronic device 300 . Optionally, the calibration device 400 can also communicate with the electronic device 300 . In addition, since the calibration device 400 is connected to the acquisition device 100 , the second processing unit 4012 in the calibration device 400 and the first processing unit 102 in the acquisition device 100 can also communicate.

Next, the calibration process of the acquisition device 100 will be described in conjunction with the calibration system shown in FIG. 12 :

FIG. 13 is a schematic diagram of a calibration process of an acquisition device 100 provided by an embodiment of the present application. Referring to FIG. 13 , the calibration process may include steps 1301 to 1310 as follows.

Step 1301 : configure n detection channels in the acquisition device 100 .

Optionally, the electronic device 300 sends the channel configuration parameters to the first processing unit 102 in the acquisition device 100 . After receiving the channel configuration parameter, the first processing unit 102 configures each detection channel 101 in the n detection channels 101 according to the channel configuration parameter. After the configuration of each detection channel 101 among the n detection channels 101 is completed, the acquisition device 100 can work normally.

Step 1302: Connect the calibration device 400 to the collection device 100 to start performing calibration.

Step 1303 : the electronic device 300 sends a calibration instruction to the voltage output module 401 in the calibration device 400 .

Optionally, the electronic device 300 can communicate directly with the calibration device 400 . In this case, the electronic device 300 may directly send a calibration instruction to the voltage output module 401 .

Alternatively, the electronic device 300 may send a calibration instruction to the voltage output module 401 through the first processing unit 102 in the acquisition device 100 . For example, the electronic device 300 may send the calibration instruction to the first processing unit 102 , and the first processing unit 102 sends the calibration instruction to the second processing unit 4012 in the voltage output module 401 .

Step 1304: After the voltage output module 401 receives the calibration instruction, if it is determined that the currently received calibration instruction is the first calibration instruction in this calibration process, then set the first voltage to the minimum value of the preset voltage range, and send Each calibration module 402 of the at least one calibration module 402 outputs a first voltage.

After the calibration device 400 is connected to the acquisition device 100 , the voltage output module 401 determines to start the calibration process. The first calibration instruction in this calibration process is the first calibration instruction received by the voltage output module 401 after the calibration device 400 is connected to the acquisition device 100 .

Optionally, after the second processing unit 4012 receives the calibration instruction, if it is determined that the currently received calibration instruction is the first calibration instruction in this calibration process, then the first voltage is set to the minimum value of the preset voltage range , output the digital quantity of the first voltage to the DAC4013, and the DAC4013 converts the digital quantity of the first voltage into an analog quantity and then outputs it to each calibration module 402 in the at least one calibration module 402.

In this case, each calibration module 402 of the at least one calibration module 402 outputs the second voltage and the third voltage to the connected detection channel 101 . Each of the n detection channels 101 in the acquisition device 100 can detect the connected detection channel 101 .

Step 1305: collect the target current value and target voltage value detected by each detection channel 101 in the n detection channels 101 in the device 100, and the first processing unit 102 obtains the target detected by each detection channel 101 in the n detection channels 101 The current value and the target voltage value are sent to the electronic device 300 .

It should be noted that, after the electronic device 300 sends a calibration instruction to the voltage output module 401 during this calibration process, the magnitude of the first voltage output by the voltage output module 401 can be predicted, because the circuit structure of the calibration module 402 is predictable , so when the magnitude of the first voltage output from the voltage output module 401 to the calibration module 402 is predicted, the theoretical current value and theoretical voltage value expected to be detected by the calibration module 402 can be predicted, that is, the n detection channels can be predicted The theoretical current value and theoretical voltage value corresponding to each detection channel 101 in 101, the theoretical current value is the current value detected by the detection channel 101, and the theoretical voltage value is the voltage value detected by the detection channel 101.

When the electronic device 300 receives the target current value and target voltage value detected by each of the n detection channels 101 sent by the first processing unit 102, the electronic device 300 obtains the target current value and the target voltage value of each of the n detection channels 101. The target current value and the target voltage value corresponding to the detection channel 101 , the target current value is the current value actually detected by the detection channel 101 , and the target voltage value is the voltage value actually detected by the detection channel 101 .

In this case, each time the electronic device 300 sends a calibration instruction to the voltage output module 401, after receiving the target current value and the target voltage value sent by the first processing unit 102, for any one of the n detection channels 101, the detection channel 101. The electronic device 300 will obtain a set of calibration current values corresponding to the detection channel 101. The set of calibration current values includes a theoretical current value and a target current value, and the electronic device 300 will obtain a set of calibration voltage values corresponding to the detection channel 101. , the set of calibration voltage values includes theoretical voltage values and target voltage values.

Step 1306: the electronic device 300 continues to send the next calibration instruction to the voltage output module 401 .

Step 1307: After the voltage output module 401 receives the calibration command, if it is determined that the currently received calibration command is not the first calibration command in this calibration process, then determine whether the first voltage is less than the maximum value of the preset voltage range.

Step 1308: When the first voltage is less than the maximum value of the preset voltage range, the voltage output module 401 increases the first voltage by a preset voltage, and outputs the first voltage to each calibration module 402 in at least one calibration module 402 .

The preset voltage can be set in advance. Optionally, the preset voltage can be set according to the difference between the minimum value and the maximum value of the preset voltage range, for example, the preset voltage can be set as the difference between the minimum value and the maximum value of the preset voltage range one tenth.

In this case, each calibration module 402 of the at least one calibration module 402 outputs the second voltage and the third voltage to the connected detection channel 101 . Each of the n detection channels 101 in the acquisition device 100 can detect the connected detection channel 101 .

Step 1309: collect the target current value and target voltage value detected by each detection channel 101 in the n detection channels 101 in the device 100, and the first processing unit 102 obtains the target detected by each detection channel 101 in the n detection channels 101 The current value and the target voltage value are sent to the electronic device 300 .

In this case, after the electronic device 300 sends multiple calibration instructions to the voltage output module 401, for any one of the n detection channels 101, the electronic device 300 will obtain multiple sets of calibration currents corresponding to the detection channel 101 Each set of calibration current values includes a theoretical current value and a target current value, and the electronic device 300 will obtain multiple sets of calibration voltage values corresponding to the detection channel 101, and each set of calibration voltage values includes a theoretical voltage value and a target voltage value.

After that, the electronic device 300 can continue to send the next calibration instruction to the voltage output module 401 . After the voltage output module 401 receives the calibration instruction, if it is determined that the currently received calibration instruction is not the first calibration instruction in this calibration process, and it is determined that the first voltage is less than the maximum value of the preset voltage range, then the first The voltage is increased by a preset voltage, and the first voltage is output to each of the at least one calibration module 402 to continue the calibration process. However, if the voltage output module 401 receives the calibration command and determines that the currently received calibration command is not the first calibration command in this calibration process, and determines that the first voltage is equal to the maximum value of the preset voltage range, then it does not send The calibration module 402 outputs a voltage to end the calibration process.

Optionally, after the voltage output module 401 determines to end the current calibration process, it may also send an end message to the electronic device 300 to indicate to the electronic device 300 that the current calibration process has ended. For example, the voltage output module 401 may send an end message to the electronic device 300 through the first processing unit 102 .

After this calibration process ends, the electronic device 300 can determine a set of calibration parameters corresponding to each detection channel 101 among the n detection channels 101 , each set of calibration parameters includes current calibration parameters and voltage calibration parameters.

Step 1310: The electronic device 300 determines a set of calibration parameters corresponding to each of the n detection channels 101, so as to obtain n sets of calibration parameters.

After this calibration process is over, for any one of the n detection channels 101, there are multiple sets of calibration current values and multiple sets of calibration current values corresponding to this detection channel 101 obtained in the current calibration process in the electronic device 300. Calibration voltage value. The electronic device 300 can determine the current calibration parameters corresponding to the detection channel 101 according to the multiple sets of calibration current values corresponding to the detection channel 101, and determine the voltage calibration parameters corresponding to the detection channel 101 according to the multiple sets of calibration voltage values corresponding to the detection channel 101. . In this way, a set of calibration parameters corresponding to each detection channel 101 among the n detection channels 101 can be obtained, which can meet multi-channel calibration requirements.

Optionally, the electronic device 300 may obtain the current calibration parameter and the voltage calibration parameter by fitting a straight line using the least square method. The least squares method for fitting a straight line is to use multiple given sample data to fit a best fitting straight line. The formula for the least squares method for fitting a straight line is y=ax+b, where a and b are the fitted straight lines The parameter, a is the slope, b is the intercept, x is the abscissa, and y is the ordinate.

In this case, when the electronic device 300 determines the current calibration parameters corresponding to the detection channel 101 according to the multiple sets of calibration current values corresponding to the detection channel 101, each of the multiple sets of calibration current values corresponding to the detection channel 101 can be calibrated The current value is used as a sample data to obtain multiple sample data, the abscissa of each sample data is the target current value, and the ordinate is the theoretical current value; a straight line is fitted according to the multiple sample data to obtain the slope of the fitted line a and intercept b, that is, determine the function y=ax+b; determine the slope a and intercept b of the fitted line as current calibration parameters corresponding to the detection channel 101 .

When the electronic device 300 determines the voltage calibration parameters corresponding to the detection channel 101 according to the multiple sets of calibration voltage values corresponding to the detection channel 101, each set of calibration voltage values in the multiple sets of calibration voltage values corresponding to the detection channel 101 can be used as a sample Data to obtain multiple sample data, the abscissa of each sample data is the target voltage value, and the ordinate is the theoretical voltage value; according to the multiple sample data, a straight line is fitted to obtain the slope a and intercept b of the fitted line , that is, determine the function y=ax+b; determine the slope a and intercept b of the fitted line as the voltage calibration parameters corresponding to the detection channel 101 .

After the electronic device 300 has obtained n sets of calibration parameters, the calibration process of the acquisition device 100 is completed, and at this time, the connection between the calibration device 400 and the acquisition device 100 can be disconnected.

Further, after obtaining the n sets of calibration parameters, the electronic device 300 may also send the n sets of calibration parameters to the first processing unit 102 in the acquisition device 100 for storage. Optionally, the first processing unit 102 may store n sets of calibration parameters into the memory 105 in the acquisition device 100 .

In some embodiments, after receiving the calibration parameters sent by the electronic device 300, the first processing unit 102 first stores the calibration parameters in the cache space of the first processing unit 102, and then writes the calibration parameters in the cache space into the memory 105 in. However, due to the size limitation of the acquisition device 100, the power consumption and logic resources of the first processing unit 102 are very limited, so in this embodiment of the present application, when the electronic device 300 sends the calibration parameters to the first processing unit 102, a A cache space self-adaptive method, by monitoring the remaining size of the cache space of the first processing unit 102 in real time to adjust the size of the data packet carrying the calibration parameters to be delivered, so as to ensure the normal operation of the first processing unit 102, or The resource consumption of the acquisition device 100 is reduced.

FIG. 14 is a schematic diagram of a cache space adaptive manner provided by an embodiment of the present application. Referring to FIG. 14 , the caching space adaptive manner may include steps 1401 to 1405 as follows.

Step 1401: After obtaining n sets of calibration parameters, the electronic device 300 generates a data packet carrying n sets of calibration parameters.

Step 1402: The electronic device 300 acquires the remaining size of the cache space of the first processing unit 102.

The remaining size of the cache space is an unoccupied space in the cache space of the first processing unit 102 .

Optionally, the electronic device 300 may send a cache acquisition request to the first processing unit 102 . After receiving the cache acquisition request sent by the electronic device 300 , the first processing unit 102 may determine its own current remaining size of the cache space, and send the remaining size of the cache space to the electronic device 300 .

If the size of the data packet generated by the electronic device 300 in step 1401 is less than or equal to the remaining size of the cache space, the electronic device 300 executes the following step 1403 . If the size of the data packet is greater than the remaining size of the cache space, the electronic device 300 performs the following step 1404 .

Step 1403: If the size of the data packet is less than or equal to the remaining size of the cache space, the electronic device 300 sends the data packet to the first processing unit 102, and then executes step 1405.

Step 1404: If the size of the data packet is greater than the remaining size of the cache space, the electronic device 300 generates a new data packet according to at least one set of calibration parameters in the data packet, and the size of the newly generated data packet is smaller than or equal to the cache space If there is a remaining size, send the newly generated data packet to the first processing unit 102, and then execute step 1405.

Step 1405: After receiving the data packet, the first processing unit 102 stores the calibration parameters in the data packet into the cache space of the first processing unit 102, and then stores the calibration parameters in the cache space into the memory 105 .

After the electronic device 300 executes the above step 1403 or step 1404, if there are one or more sets of calibration parameters that have not been sent to the first processing unit 102 among the n sets of calibration parameters, the electronic device 300 generates an or data packets of multiple sets of calibration parameters, and then re-execute the above steps 1402 to 1405 until all the n sets of calibration parameters are sent to the first processing unit 102 .

Since the first processing unit 102 continuously stores some data into its own cache space during the working process, and also continuously writes the data in its own cache space into the memory 105, the cache space of the first processing unit 102 remains Size is constantly changing. Therefore, before each time the electronic device 300 needs to send a data packet carrying calibration parameters to the first processing unit 102, it can first obtain the current remaining size of the buffer space of the first processing unit 102, and then adjust the size of the data packet to be sent accordingly. Size, so that the size of the data packet carrying the calibration parameters finally sent to the first processing unit 102 is less than or equal to the current remaining size of the first processing unit 102 cache space, so that the normal operation of the first processing unit 102 can be guaranteed.

It should be noted that the above n groups of calibration parameters may be updated at intervals. For example, every six months, the calibration device 400 can be used to calibrate the acquisition device 100 to obtain new n sets of calibration parameters, and the new n sets of calibration parameters can be updated to the electronic device 300 and the acquisition device 100 for storage. In this way, when the performance of components of the detection channel 101 in the acquisition device 100 changes over time, the high-precision detection of the acquisition device 100 can be maintained through the updated n sets of calibration parameters.

Next, the working process of the acquisition device 100 will be described.

When it is necessary to determine the power consumption of the target object 200 , the technician connects the acquisition device 100 to the target object 200 . After the acquisition device 100 is connected to the target object 200, the n detection channels 101 in the acquisition device 100 are connected to the n loads C in the target object 200 one by one, and each detection channel 101 in the n detection channels 101 can detect the connected The current value and voltage value of the load C. In addition, the first processing unit 102 in the acquisition device 100 can communicate with the electronic device 300 .

FIG. 15 is a schematic diagram of a working process of an acquisition device 100 provided by an embodiment of the present application. Referring to FIG. 15 , the working process may include steps 1501 to 1504 as follows.

Step 1501: the electronic device 300 sends a collection instruction to the first processing unit 102.

The electronic device 300 may send a collection instruction to the first processing unit 102 when the power consumption of the target object 200 needs to be determined. The collection instruction is used to instruct to start collecting current and voltage data. The collection instruction may be automatically triggered by the electronic device 300, or manually triggered by a technician on the electronic device 300, which is not limited in this embodiment of the present application.

Step 1502: After receiving the acquisition instruction sent by the electronic device 300, the first processing unit 102 acquires the current value and voltage value detected by each of the n detection channels 101 to obtain n sets of current and voltage data.

Step 1503: the first processing unit 102 obtains n sets of calibration parameters from the memory 105, and uses the n sets of calibration parameters to calibrate the n sets of current and voltage data.

For a set of current and voltage data detected by any one of the n detection channels 101, the first processing unit 102 can use a set of calibration parameters corresponding to the detection channel 101 to calibrate the set of current and voltage data to obtain Calibrated current and voltage data. For example, the current calibration parameters corresponding to the detection channel 101 include slope a1 and intercept b1, then the first processing unit 102 can multiply the current value detected by the detection channel 101 by a1 and then add it to b1 to obtain the calibration After the current value. The voltage calibration parameters corresponding to the detection channel 101 include slope a2 and intercept b2, then the first processing unit 102 can multiply the voltage value detected by the detection channel 101 by a2 and then add it to b2 to obtain the calibrated voltage value.

Step 1504: the first processing unit 102 sends the n sets of calibrated current and voltage data to the electronic device 300 .

After receiving the calibrated n sets of current and voltage data sent by the first processing unit 102, the electronic device 300 can realize the overall power consumption of the target object 200 and the power consumption of each load C in the target object 200 according to the n sets of current and voltage data. confirmation.

Optionally, driver software and interface software may be installed in the electronic device 300 . Wherein, the driver software can perform data processing on the n sets of current and voltage data, such as filter processing, calibration processing, power consumption confirmation, or other extended processing on the n sets of current and voltage data, which is not limited in this embodiment of the present application . After the driving software performs data processing on the n sets of current and voltage data, it can report the data processing results to the interface software. The interface software can display the data according to the data processing results. For example, the interface software can display the V-I-P characteristic curve, so that technicians can know the changes of voltage, current and power in time. In some embodiments, the interface software can also perform relevant mathematical calculations on the data processing results, for example, can calculate the average value of the V-I-P characteristic curve and the like. Optionally, the interface software can also have function buttons, which can be used to implement operations such as zooming, for example, the displayed V-I-P characteristic curve can be zoomed in or out. In this way, it is convenient for technicians to perform hardware and software troubleshooting, analysis and research according to the data processing results of the driver software and the data display of the interface software.

It should be noted that after the electronic device 300 sends the collection instruction to the first processing unit 102, the first processing unit 102 can continuously obtain the current value and voltage value detected by each detection channel 101 in the n detection channels 101 and use the The calibration parameters are sent to the electronic device 300 after calibration. For example, the first processing unit 102 may periodically (for example, every 1 second) obtain the current value and voltage value detected by each detection channel 101 in the n detection channels 101 and send it to the electronic device after being calibrated using calibration parameters 300. Until the electronic device 300 sends the acquisition end instruction to the first processing unit 102 , the first processing unit 102 ends the acquisition and no longer acquires the current value and voltage value detected by each detection channel 101 in the n detection channels 101 . Afterwards, the technician can disconnect the connection between the acquisition device 100 and the target object 200 .

The electronic device 300 may send a collection end instruction to the first processing unit 102 when there is no need to continue determining the power consumption of the target object 200 . The collection end instruction is used to instruct to stop collecting current and voltage data. The collection end instruction may be automatically triggered by the electronic device 300, or manually triggered by a technician on the electronic device 300, which is not limited in this embodiment of the present application.

In some embodiments, multiple acquisition devices 100 may also be used for extended use in order to meet the testing requirements of multiple channels to the greatest extent. In this case, multiple acquisition devices 100 can be connected to the same object, or multiple acquisition devices 100 can be connected to different objects, and multiple acquisition devices 100 can be connected to the electronic device 300, so as to achieve more Simultaneous acquisition of multiple channels is described below.

Fig. 16 is a schematic diagram of an acquisition system provided by an embodiment of the present application. Referring to FIG. 16 , the acquisition system may include an electronic device 300 and a plurality of acquisition devices 100 . It should be noted that in FIG. 16, the acquisition system includes four acquisition devices 100 as an example for exemplary illustration. FIG. 16 does not limit the number of acquisition devices 100 included in the acquisition system. In practical applications, the acquisition system may include More or fewer acquisition devices 100 than shown.

The electronic device 300 is connected to a plurality of acquisition devices 100 . Optionally, the electronic device 300 and multiple acquisition devices 100 can be connected through a USB interface expander (that is, USB-HUB), and the connection between one electronic device 300 and multiple acquisition devices 100 can be realized through the USB interface expander, realizing 1 Drag and expand. For example, the data transmission rate between the acquisition device 100 and the USB interface extender may be 120 Mbps (megabits per second), and the data transmission rate between the electronic device 300 and the USB interface extender may be 480 Mbps.

The USB interface expander used to connect the electronic device 300 and multiple acquisition devices 100 in the embodiment of the present application may be a single USB interface expander, or may be formed by cascading multiple USB interface expanders. The embodiment does not limit this.

Optionally, the USB interface expander can be set on the object that needs to measure the power consumption. In this case, when the power consumption measurement of the object needs to be performed, the electronic device can be connected through the USB interface expander set on the object 300 and multiple acquisition devices 100.

Exemplarily, the object may be provided with a BTB connector. A USB interface extender may be provided on the BTB connector of the object. In this case, when it is necessary to measure the power consumption of the object, multiple acquisition devices 100 are connected to the BTB connector of the object, and the electronic device 300 is also connected to the BTB connector of the object. In this way, not only The connection between each acquisition device 100 in the plurality of acquisition devices 100 and the load in the object can be realized, and the connection between the plurality of acquisition devices 100 and the electronic device 300 can also be realized.

In some embodiments, the electronic device 300 can be connected to a plurality of acquisition devices 100 through a USB interface extender, and the plurality of acquisition devices 100 are all connected to an object, so as to collect the current and voltage data of the object. Moreover, the electronic device 300 can also be connected to other multiple acquisition devices 100 through another USB interface extender, and these multiple acquisition devices 100 can be connected to another object. In this way, the electronic device 300 can implement power consumption measurement for multiple objects through multiple USB interface extenders.

In other embodiments, the electronic device 300 can be connected to multiple acquisition devices 100 through a USB interface extender, and the multiple acquisition devices 100 can be connected to different objects to collect current and voltage data of different objects. In this way, the electronic device 300 can implement power consumption measurement for multiple objects through a USB interface extender.

It should be noted that the plurality of acquisition devices 100 are all acquisition devices calibrated by the above-mentioned calibration device 400, and each acquisition device 100 in the plurality of acquisition devices 100 stores its own n detection channels 101 in each detection channel 101 Corresponding current calibration parameters and voltage calibration parameters. Any two acquisition devices 100 among the plurality of acquisition devices 100 are used to collect current and voltage data of different objects or to collect current and voltage data of the same object. Each acquisition device 100 among the plurality of acquisition devices 100 calibrates the detected current and voltage data by using the current calibration parameter and the voltage calibration parameter, and then sends it to the electronic device 300 . According to this, the electronic device 300 can realize the confirmation of the power consumption of more loads of the same object, or can realize the confirmation of the power consumption of loads of different objects. In this way, the acquisition system can realize power consumption measurement of more channels by extending the use of multiple acquisition devices 100 , and has considerable flexibility.

Data acquisition is synchronized when multiple acquisition devices 100 work. That is, when multiple acquisition devices 100 work at the same time, it is necessary to ensure the synchronization of data acquisition and transmission among the detection channels 101 of different acquisition devices 100 . In this case, as shown in FIG. 17 , the embodiment of the present application has designed a master-slave logic control function, and the electronic device 300 will define the master-slave devices in the multiple acquisition devices 100 according to the identification order of the acquisition devices 100, and the master acquisition device 100 A synchronous pulse signal will be generated, and all detection channels 101 of the plurality of acquisition devices 100 will collect and transmit data under the control of the synchronous pulse signal. Next, the master-slave logic control function will be described.

Fig. 18 is a schematic diagram of a master-slave logic control function provided by the embodiment of the present application. Referring to FIG. 18 , the master-slave logic control function may include steps 1801 to 1806 as follows.

Step 1801: The electronic device 300 scans for USB devices.

Step 1802: The electronic device 300 recognizes that the first acquisition device 100 is connected.

If the electronic device 300 recognizes that there is a collection device 100 connected, it can obtain the identification of the connected collection device 100, and determine the number of channels of the collection device 100 according to the identification of the collection device 100. The number of channels means that the collection device 100 has The number of detection channels 101.

Step 1803: the electronic device 300 creates an instrument instance.

The instrument instance is used to indicate the total number of channels of all connected acquisition devices 100 , that is, the total number of detection channels 101 .

Step 1804: The electronic device 300 creates a corresponding device instance according to the identification of the collection device 100 .

The device instance corresponding to an acquisition device 100 is used to indicate how many channels the acquisition device 100 has, that is, how many detection channels 101 the acquisition device 100 has.

Step 1805: The electronic device 300 recognizes the second collection device 100 or more collection devices 100 .

After the electronic device 300 recognizes the first acquisition device 100, each time it recognizes a new acquisition device 100, it may update the instrument instance.

Step 1806: The electronic device 300 determines that the number of connected collection devices 100 is greater than or equal to 2, and then determines the master-slave relationship of the connected collection devices 100 .

It should be noted that, after the multiple collection devices 100 are connected to the electronic device 300 , the specified pins of each collection device 100 in the multiple collection devices 100 are connected to the same node.

The electronic device 300 may determine that the first connected collection device 100 is the master device, and send an indication message to the first connected collection device 100 . The acquisition device 100 determines itself as the master device after receiving the indication message, and then pulls the level of its designated pin high to generate a synchronous pulse signal. Since the designated pins of each collection device 100 among the multiple collection devices 100 are connected to the same node, after the collection device 100 pulls up the level of its designated pin, other collection devices 100 will detect its designated pin. When the level of the pin is pulled high, the synchronization pulse signal will be detected. In this case, other acquisition devices 100 determine themselves as slave devices, and perform data collection and transmission according to the detected synchronization pulse signal.

Optionally, after the electronic device 300 determines the master-slave relationship of the connected multiple acquisition devices 100, it may determine the connection information of each of the multiple acquisition devices 100 according to the instrument instance and the device instance, and connect the multiple acquisition devices 100 to The connection information of each acquisition device 100 in 100 is transmitted to the interface software in the electronic device 300, so that the interface software can refer to the connection information for subsequent display when performing data display. For example, the data corresponding to different acquisition devices 100 can be independently displayed. display or joint display.

The electronic device 300 involved in the embodiment of the present application will be described below.

FIG. 19 is a schematic structural diagram of an electronic device 300 provided by an embodiment of the present application. Referring to FIG. 19 , an electronic device 300 includes at least one processor 1901 , a communication bus 1902 , a memory 1903 and at least one communication interface 1904 .

The processor 1901 may be a microprocessor (including a central processing unit (central processing unit, CPU), etc.), an application-specific integrated circuit (application-specific integrated circuit, ASIC), or may be one or more integrated circuit for program execution.

Communication bus 1902 may include a path for communicating information between the components described above.

The memory 1903 can be a read-only memory (read-only memory, ROM), a random access memory (random access memory, RAM), an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), an optical disc (including compact disc read-only memory (CD-ROM, compact disc, laser disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage medium, or other magnetic storage device, or is capable of carrying or storing or any other medium in which desired program code in the form of a data structure can be accessed by a computer, but is not limited thereto. The memory 1903 may exist independently, and is connected to the processor 1901 through the communication bus 1902 . The memory 1903 can also be integrated with the processor 1901.

The communication interface 1904 uses any device such as a transceiver for communicating with other devices or communication networks, such as Ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area network, WLAN) and so on.

In a specific implementation, as an embodiment, the processor 1901 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 19 .

In a specific implementation, as an example, the electronic device 300 may include multiple processors, such as the processor 1901 and the processor 1905 shown in FIG. 19 . Each of these processors can be a single-core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data such as computer program instructions.

In a specific implementation, as an example, the electronic device 300 may further include an output device 1906 and an input device 1907 . Output device 1906 is in communication with processor 1901 and can display information in a variety of ways. For example, the output device 1906 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector), etc. The input device 1907 communicates with the processor 1901 and can receive user input in various ways. For example, the input device 1907 may be a mouse, a keyboard, a touch screen device or a sensing device, etc.

The aforementioned electronic device 300 may be a general-purpose computer device or a special-purpose computer device. In a specific implementation, the electronic device 300 may be a desktop computer, a portable computer, a network server, a palmtop computer, a mobile phone, a tablet computer, a wireless terminal device, a communication device or an embedded device, and the embodiment of the present application does not limit the type of the electronic device 300 .

Wherein, the memory 1903 is used to store the program code 1910 for executing the solution of the present application, and the processor 1901 is used to execute the program code 1910 stored in the memory 1903 . The electronic device 300 may implement the operations performed by the electronic device 300 in the foregoing embodiments through the processor 1901 and the program code 1910 in the memory 1903 .

Next, the software system of the electronic device 300 will be described.

FIG. 20 is a schematic diagram of a software system of an electronic device 300 provided by an embodiment of the present application. Referring to FIG. 20 , the software system of the electronic device 300 may include: interface software 301 , driver software 302 , and embedded software 303 .

Among them, the embedded software 303 can perform functions such as collection and transmission of current data, collection and transmission of voltage data, identification and data synchronization of multiple collection devices, storage and recall of calibration parameters, and the like. The collection and transmission of the current data means that the embedded software 303 can receive the current data sent by the collection device 100 and transmit the current data to the driver software 302 for processing. The collection and transmission of the voltage data means that the embedded software 303 can receive the voltage data sent by the collection device 100 and transmit the voltage data to the driver software 302 for processing. The multi-acquisition device identification and data synchronization means that the embedded software 303 can identify multiple acquisition devices 100 connected to the electronic device 300, and can determine the master-slave relationship between the multiple acquisition devices 100, so as to realize multiple acquisition devices. Data synchronization between 100. The storage and calling of the calibration parameters means that the embedded software 303 can determine the calibration parameters of the acquisition device 100 during the calibration process, and can use the calibration parameters to calibrate the corresponding current and voltage data when necessary.

The driver software 302 can perform data processing on the current and voltage data after obtaining the current and voltage data, such as filter processing, calibration processing, power consumption confirmation, or other extended processing on the current and voltage data, which is not limited in this embodiment of the present application . After the driver software 302 performs data processing on the current and voltage data, it can report the data processing result to the interface software 301 . Optionally, the driver software 302 can also configure the detection channel 101 in the acquisition device 100 .

The interface software 301 can display the data according to the data processing results. For example, the interface software 301 can display the V-I-P characteristic curve, so that technicians can know the changes of voltage, current and power in time. In some embodiments, the interface software 301 can also perform relevant mathematical calculations on the data processing results, for example, can calculate the average value of the V-I-P characteristic curve, and the like. Optionally, the interface software 301 can also have function buttons, which can be used to implement operations such as zooming, for example, the displayed V-I-P characteristic curve can be zoomed in or out. In this way, it is convenient for technicians to perform hardware and software troubleshooting, analysis and research according to the data processing results of the driver software 302 and the data display conditions of the interface software 301 .

In the above embodiments, all or part may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be accessed from a website, computer, server, or data center Transmission to another website site, computer, server or data center via wired (such as: coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as: infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or may be a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a digital versatile disk (Digital Versatile Disc, DVD)), or a semiconductor medium (such as a solid state disk (Solid State Disk, SSD)) wait.

The above-mentioned optional embodiments provided by the application are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the technical scope of the disclosure of the application shall be included in the scope of the application. within the scope of protection.

Claims (15)

1. A calibration device, the calibration device comprising: a voltage output module and at least one calibration module;

the output end of the voltage output module is connected with the input end of each calibration module in the at least one calibration module, the output end of each calibration module in the at least one calibration module is used for being connected with at least one detection channel in n detection channels in the acquisition device, and n is an integer greater than or equal to 2;

the voltage output module is used for outputting a first voltage to each calibration module in the at least one calibration module, each calibration module in the at least one calibration module outputs a second voltage and a third voltage to a connected detection channel under the condition that the first voltage is input, each detection channel in the n detection channels is used for detecting a target current value according to the second voltage input by the connected detection channel and detecting a target voltage value according to the third voltage input by the connected calibration module, a current calibration parameter corresponding to each detection channel is determined according to a theoretical current value and the target current value, and a voltage calibration parameter corresponding to each detection channel is determined according to the theoretical voltage value and the target voltage value.

2. The calibration device of claim 1, wherein the voltage output module comprises a reference voltage source, a second processing unit, and a digital-to-analog converter DAC;

the two output ends of the reference voltage source are connected with the two reference voltage ends of the DAC one by one, the output end of the second processing unit is connected with the input end of the DAC, and the output end of the DAC is connected with the input end of each calibration module in the at least one calibration module.

3. The calibration device of claim 2, wherein the voltage output module further comprises two first voltage followers, one of the two first voltage followers being connected between one output of the reference voltage source and one reference voltage terminal of the DAC, the other first voltage follower being connected between the other output of the reference voltage source and the other reference voltage terminal of the DAC.

4. The calibration device of claim 1, wherein any one of the at least one calibration module comprises a second resistor and a third resistor, a first end of the second resistor being connected to the output of the voltage output module, a second end of the second resistor being connected to a first end of the third resistor, a second end of the third resistor being connected to ground, and two ends of the second resistor being configured to be connected to at least one of the n detection channels.

5. The calibration device of claim 4, wherein the one calibration module further comprises a second voltage follower connected between an output of the voltage output module and a first end of the second resistor.

6. The calibration device of claim 1, further comprising a third voltage follower connected between an output of the voltage output module and an input of each of the at least one calibration module.

7. The calibration device of any one of claims 1 to 6, wherein the calibration device and the acquisition device are configured to be connected by a board-to-board connector.

8. A calibration system, which is characterized by comprising a calibration device, an acquisition device and electronic equipment;

the calibration device comprises a voltage output module and at least one calibration module, the acquisition device comprises n detection channels and a first processing unit, and n is a positive integer greater than or equal to 2;

the output end of the voltage output module is connected with the input end of each calibration module in the at least one calibration module; the output end of each calibration module in the at least one calibration module is connected with at least one detection channel in the n detection channels; the n acquisition ends of the first processing unit are connected with the n detection channels one by one;

The voltage output module is used for outputting a first voltage to each calibration module in the at least one calibration module; each of the at least one calibration module outputs a second voltage and a third voltage to the connected detection channel with the first voltage input;

each of the n detection channels is used for detecting a target current value according to the second voltage input by the connected detection channel and detecting a target voltage value according to the third voltage input by the connected calibration module; the first processing unit is used for acquiring the target current value and the target voltage value detected by each detection channel and sending the target current value and the target voltage value to the electronic equipment;

the electronic device is used for determining current calibration parameters corresponding to each detection channel according to a theoretical current value and the target current value, and determining voltage calibration parameters corresponding to each detection channel according to a theoretical voltage value and the target voltage value so as to obtain n groups of calibration parameters corresponding to the n detection channels one by one, wherein each group of calibration parameters in the n groups of calibration parameters comprises the current calibration parameters and the voltage calibration parameters.

9. The calibration system of claim 8,

the electronic equipment is used for sending a calibration instruction to the voltage output module;

the voltage output module is used for setting the first voltage to be the minimum value of a preset voltage range under the condition that the currently received calibration instruction is the first calibration instruction in the current calibration process, and outputting the first voltage to each calibration module in the at least one calibration module; under the condition that the currently received calibration command is not the first calibration command received in the current calibration process, if the first voltage is determined to be smaller than the maximum value of the preset voltage range, the first voltage is increased by the preset voltage, the first voltage is output to each calibration module in the at least one calibration module, and if the first voltage is determined to be equal to the maximum value of the preset voltage range, the current calibration process is ended.

10. The calibration system of claim 9,

the electronic device is configured to determine, for any one of the n detection channels after the calibration process is finished, a current calibration parameter corresponding to the one detection channel according to a plurality of sets of calibration current values corresponding to the one detection channel obtained in the calibration process, where each set of calibration current values includes the theoretical current value and the target current value, and determine, according to a plurality of sets of calibration voltage values corresponding to the one detection channel obtained in the calibration process, a voltage calibration parameter corresponding to the one detection channel, where each set of calibration voltage values includes the theoretical voltage value and the target voltage value.

11. A calibration system according to any one of claims 8 to 10, wherein the electronic device is arranged to send the n sets of calibration parameters to the first processing unit for storage.

12. The calibration system of claim 11, wherein the electronic device is to:

generating a data packet carrying the n groups of calibration parameters;

obtaining the residual size of the cache space of the first processing unit;

if the size of the data packet is smaller than or equal to the residual size of the buffer space, the data packet is sent to the first processing unit; if the size of the data packet is larger than the residual size of the buffer space, generating a new data packet according to at least one group of calibration parameters in the data packet, wherein the size of the new data packet is smaller than or equal to the residual size of the buffer space, and transmitting the newly generated data packet to the first processing unit;

and if one or more groups of calibration parameters which are not transmitted to the first processing unit exist in the n groups of calibration parameters, generating a data packet carrying the one or more groups of calibration parameters, and re-executing the step of acquiring the residual size of the cache space of the first processing unit and the subsequent steps until the n groups of calibration parameters are transmitted to the first processing unit.

13. The acquisition system is characterized by comprising electronic equipment and a plurality of acquisition devices, wherein the electronic equipment is connected with the plurality of acquisition devices;

the plurality of acquisition devices are all acquisition devices calibrated by the calibration device according to any one of claims 1 to 7, each acquisition device in the plurality of acquisition devices stores current calibration parameters and voltage calibration parameters corresponding to each detection channel in n detection channels of the acquisition devices, and data acquisition is synchronous when the plurality of acquisition devices work;

any two acquisition devices in the plurality of acquisition devices are used for acquiring current and voltage data of different objects or current and voltage data of the same object; and each acquisition device in the plurality of acquisition devices uses the current calibration parameter and the voltage calibration parameter to calibrate the current and voltage data and then sends the current and voltage data to the electronic equipment.

14. The acquisition system of claim 13 wherein the electronic device is coupled to the plurality of acquisition devices through a universal serial bus USB interface extender.

15. The acquisition system of claim 13 or 14, wherein designated pins of each of the plurality of acquisition devices are connected to the same node after the plurality of acquisition devices are connected to the electronic device;

The electronic device is used for: when the acquisition devices are identified to be connected, if the number of the acquisition devices which are connected currently is determined to be more than or equal to 2, determining the acquisition device which is connected first as a main device, and sending an indication message to the acquisition device which is connected first;

the first connected acquisition device is used for: after receiving the indication message, determining the self as main equipment, and raising the level of the appointed pin of the self to generate a synchronous pulse signal;

the other acquisition devices are used for: if the level of the appointed pin of the self is detected to be pulled up, the self is determined to be slave equipment, and data acquisition is carried out according to the synchronous pulse signal generated on the appointed pin of the self.

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