Multi-channel current detection control system

Abstract

The utility model relates to a multichannel current detection control system, which comprises a control module, a comparison module, a multiplexing module and at least two current detection circuits, and is characterized in that the multiplexing module comprises an output end and at least two input ends; the input end of the current detection circuit is connected with a load to be detected, and the output end of the current detection circuit is independently connected to one input end of the multiplexing module; the first input end of the comparison module is connected with the output end of the multiplexing module, the second input end of the comparison module is connected with the first direct-current voltage source, and the output end of the comparison module is connected to the first end of the control module; the second end of the control module is connected with the control interface of the multiplexing module, and the control module is used for sending a channel switching signal to the multiplexing module. The multi-channel current detection control system can realize current value detection of a plurality of loads to be detected, detect whether the current state of the loads to be detected is normal or not and perform feedback control, thereby protecting the loads to be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric energy detection technical field especially relates to a kind of multi-channel current detection control system. BACKGROUND

[0002] At present, current detection circuit can only detect the current of single circuit, cannot realize the detection of multiple circuits simultaneously, and current detection circuit needs to realize the function of current detection by multiple MOS tubes, and the circuit structure is complex and single function, which is not conducive to control, and does not have the functions of detection feedback and the like. UTILITY MODEL CONTENTS

[0003] In order to solve at least one technical problem proposed above, the utility model provides a kind of multi-channel current detection control system.

[0004] According to some embodiments of the utility model, a kind of multi-channel current detection control system is provided, the system includes control module, comparison module, multiplexing module and at least two current detection circuits, the multiplexing module includes one output end and at least two input ends;The input end of the current detection circuit is connected to the load to be measured, and the output end of the current detection circuit is individually connected to one input end of the multiplexing module;The first input end of the comparison module is connected with the output end of the multiplexing module, and the second input end of the comparison module is connected first DC voltage source, and the output end of the comparison module is connected to the first end of the control module;The second end of the control module is connected with the control interface of the multiplexing module, and the control module is used to send channel switching signal to the multiplexing module.

[0005] Based on the above scheme, the multiplexing module is connected with multiple current detection circuits, each current detection circuit can be connected with independent load to be measured, the control module controls the connection between specified input end and output end in the multiplexing module, by switching the input end connected with the output end in the multiplexing module, the current value detection of multiple loads to be measured can be realized;And the comparison module determines whether the current state of the load to be measured is normal according to the comparison result between the detection voltage signal output by the multiplexing module and the first DC voltage source, so that the system realizes current abnormality detection and feedback control on the basis of current value detection, thereby protecting the load to be measured.

[0006] In some possible implementation manners, the current detection circuit comprises a sampling resistor and a current detection chip, a first end of the sampling resistor is connected to the second DC voltage source, and a second end of the sampling resistor is connected to the load to be detected; a first input end of the current detection chip is connected to the first end of the sampling resistor, a second input end of the current detection chip is connected to the second end of the sampling resistor, and an output end of the current detection chip is individually connected to one input end of the multiplexing module, and the current detection chip is configured to output a corresponding detection voltage signal according to a voltage value between the sampling resistor.

[0007] According to the above scheme, the sampling resistor is arranged in series with the load to be detected, the current of the sampling resistor is the same as that of the load to be detected, the voltage between the sampling resistor is obtained through the current detection chip, the current information is converted into voltage information, and subsequent chip identification signals and processing and calculation are facilitated.

[0008] In some possible implementation manners, the current detection circuit further comprises a feeding inductor and a fuse, a first end of the fuse is connected to the second end of the sampling resistor, a second end of the fuse is connected to a first end of the feeding inductor, and a second end of the feeding inductor is connected to the load to be detected.

[0009] According to the above scheme, the feeding inductor arranged in the current detection circuit helps to stabilize the voltage and the current, ensures the normal operation of the current detection circuit, and the feeding inductor can also improve the anti-interference capability of the current detection circuit, so that the current detection circuit is not affected by other circuits and external interference.

[0010] In some possible implementation manners, in different current detection circuits, the resistance values of the sampling resistors are different.

[0011] According to the above scheme, the resistance values of the sampling resistors in different current detection circuits are limited to be different, so that the current threshold values measured in different current detection circuits are different, and the system can perform current detection control on different types of loads to be detected.

[0012] In some possible implementation manners, the comparison module comprises a comparator and a voltage dividing circuit, the voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, a first end of the first voltage dividing resistor is connected to the first DC voltage source, a second end of the first voltage dividing resistor is connected to a first end of the second voltage dividing resistor, and a second end of the second voltage dividing resistor is grounded; a first input end of the comparator is connected to the output end of the multiplexing module, a second input end of the comparator is connected to the second end of the first voltage dividing resistor, and an output end of the comparator is connected to a first end of the control module.

[0013] Based on the above scheme, by setting the voltage dividing circuit, the voltage signal value of the second input end of the comparator can be accurately set, so as to accurately set the current threshold in the current detection control.

[0014] In some possible implementation manners, the first voltage dividing resistor and / or the second voltage dividing resistor is a variable resistor.

[0015] Based on the above scheme, the voltage dividing circuit comprises at least one variable resistor, and the resistance value of the variable resistor can be adjusted. By adjusting the resistance value of the variable resistor, the voltage signal value of the second input end of the comparator can be adjusted, that is, the current threshold in the current detection control can be changed.

[0016] In some possible implementation manners, the system further comprises a direct current power supply module, the direct current power supply module comprises at least two different independent power supply output channels, and the direct current power supply module is connected with the control module, the comparison module, the multiplexing module and the current detection circuit respectively to provide direct current power supply.

[0017] Based on the above scheme, the direct current power supply module supplies power to the multiple functional modules through the independent power supply output channels respectively, which helps to reduce the signal interference between the modules and improve the accuracy of signal processing.

[0018] In some possible implementation manners, the direct current power supply module comprises a multi-channel adjustable direct current power supply, and at least one independent power supply output channel of the multi-channel adjustable direct current power supply is connected to the voltage dividing circuit.

[0019] Based on the above scheme, the voltage value of the independent power supply output channel of the multi-channel adjustable direct current power supply is adjustable. By adjusting the voltage value of the independent power supply output channel, the voltage signal value of the second input end of the comparator can be adjusted, that is, the current threshold in the current detection control can be changed, so that the adjustment control step is simple and easy to operate, and the use experience is enhanced.

[0020] In some possible implementation manners, the control module comprises a single-chip microcomputer and an upper computer, a first end of the single-chip microcomputer is connected with an output end of the comparison module, a second end of the single-chip microcomputer is connected with a control interface of the multiplexing module, and the single-chip microcomputer is in communication connection with the upper computer.

[0021] Based on the above scheme, the single-chip microcomputer, the comparison module and the multiplexing module are directly connected, the single-chip microcomputer, the comparison module, the multiplexing module and the current detection circuit can be integrated in one device, and the modular design of the system is facilitated.

[0022] In some possible implementation manners, the current detection circuit comprises a sampling resistor and a differential amplification circuit, a first end of the sampling resistor is connected to a first direct current voltage source, and a second end of the sampling resistor is connected to the load to be detected; a first input end of the differential amplification circuit is connected to the first end of the sampling resistor, a second input end of the differential amplification circuit is connected to the second end of the sampling resistor, and an output end of the differential amplification circuit is separately connected to one input end of the multiplexing module.

[0023] Based on the above scheme, the sampling resistor is arranged in series with the load to be detected, the current of the sampling resistor is the same as that of the load to be detected, the voltage across the sampling resistor is obtained through the differential amplification circuit, the current information can also be converted into voltage information, and subsequent chip identification signals and processing and calculation are facilitated.

[0024] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, rather than limiting the present application.

[0025] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions and advantages of the embodiments in the present specification or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present specification, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0027] Figure 1 A first structural block diagram of a multi-channel current detection control system according to an embodiment of the present application is shown;

[0028] Figure 2 A second structural block diagram of a multi-channel current detection control system according to an embodiment of the present application is shown;

[0029] Figure 3 A third structural block diagram of a multi-channel current detection control system according to an embodiment of the present application is shown;

[0030] Figure 4 A fourth structural block diagram of a multi-channel current detection control system according to an embodiment of the present application is shown;

[0031] Figure 5 A circuit structural diagram of a multi-channel current detection control system according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described in the specification of the present application combined with the drawings of the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present application.

[0033] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological order. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server including a series of steps or units does not necessarily have to include those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0034] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings represent functionally the same or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0035] The word "exemplary" is used herein in the sense of being an example, illustration, or demonstration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0036] The term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" in the present application means any one of a plurality of or any combination of at least two of a plurality of, for example, including at least one of A, B and C can mean including any one or more elements selected from the set consisting of A, B and C.

[0037] The term "connection" in the present application can be understood as A directly connected to B, or A connected to B through an intermediate component, which can be an electrical element, a circuit, a chip and a module, etc.

[0038] In addition, in order to better illustrate the utility model, numerous specific details are given in the specific embodiments below. Those skilled in the art should understand that the utility model can also be implemented without certain specific details. In some examples, methods, means, elements and circuits familiar to those skilled in the art are not described in detail in order to highlight the main idea of the utility model.

[0039] The utility model embodiment provides a kind of multi-channel current detection control system, the system includes multiple current detection channels, each current detection channel can connect one load to be measured, system can carry out current detection control to the load to be measured on multiple current detection channels, and system can identify the current value of the load to be measured connected by each current detection channel whether in preset current range, and feedback when the current value of the load to be measured exceeds preset current range, to facilitate the protection of load to be measured.

[0040] Please refer to Figure 1 The multi-channel current detection control system of the embodiment includes a control module, a comparison module, a multiplexing module, and at least two current detection circuits. The multiplexing module includes one output terminal and at least two input terminals. The multiplexing module can adjust different input terminals based on a channel switching signal of an external controller, so that the system performs current detection control on the load to be measured in different current detection circuits.

[0041] As Figure 1 shown, the circuit structure of the system of the utility model embodiment includes: the input terminal of the current detection circuit is connected to the load to be measured, the output terminal of the current detection circuit is individually connected to one input terminal of the multiplexing module, the first input terminal of the comparison module is connected to the output terminal of the multiplexing module, the second input terminal of the comparison module is connected to the first direct current voltage source, the output terminal of the comparison module is connected to the first end of the control module, the second end of the control module is connected to the control interface of the multiplexing module, and the control module is used to send a channel switching signal to the multiplexing module.

[0042] Based on the above structure, the control module switches the current detection channel by sending a channel switching signal. One current detection circuit corresponds to one current detection channel. The multiplexing module responds to the above channel switching signal, so that the output signal of the specified current detection circuit is sent to the first input terminal of the comparison module through the output terminal of the multiplexing module. The comparison module is used to output a corresponding comparison feedback signal according to the voltage comparison of the first input terminal and the second input terminal. The control module determines whether the current state of the load to be measured connected by the current detection channel is abnormal according to the comparison feedback signal output by the comparison module.

[0043] In the embodiment of the utility model, current detection circuit outputs voltage signal, and the voltage signal amplitude that outputs is positive correlation with the current value of the load to be measured connected with it, namely the current value of the load to be measured is bigger, voltage signal amplitude is bigger. The voltage signal of current detection circuit sends to the first input end of comparison module, comparison module compares the voltage signal value of first input end with the voltage signal value of second input end, when the voltage signal value of first input end is less than the voltage signal value of second input end, comparison module outputs first feedback signal, when the voltage signal value of input end is greater than the voltage signal value of second input end, comparison module outputs second feedback signal, wherein one of first feedback signal and second feedback signal is low level signal, and the other is high level signal.

[0044] The purpose of the embodiment limiting the voltage signal output by the current detection circuit is to convert the current information into voltage information, and the output voltage signal is convenient for the comparison module and the control module to directly identify and process, so that the additional conversion circuit can be omitted, thereby achieving the effect of simplifying the circuit structure.

[0045] In some embodiments, please refer to Figure 2 The current detection circuit includes a sampling resistor and a current detection chip, the first end of the sampling resistor is connected to the second DC voltage source, the second end of the sampling resistor is connected to the load to be measured, the first input end of the current detection chip is connected to the first end of the sampling resistor, the second input end of the current detection chip is connected to the second end of the sampling resistor, and the output end of the current detection chip is separately connected to one input end of the multiplexing module. The current detection chip is used to output a corresponding detection voltage signal according to the voltage value between the two ends of the sampling resistor. Based on the above structure, the sampling resistor and the load to be measured are connected in series, and the second DC voltage source supplies power to the sampling resistor and the load to be measured. Under the action of the second DC voltage source, the sampling resistor and the load to be measured generate a current, and the current flows through the sampling resistor to make the two ends of the sampling resistor have a potential difference (i.e. voltage). According to Ohm's law, the voltage of the sampling resistor in the nth current detection circuit is Un=In*Rn, and the voltage of the second DC voltage source is VCC2+. The output voltage of the current detection chip follows the following rules: if Un>VCC2+, the current detection chip outputs a voltage of Un to the multiplexing module, and if Un≤VCC2+, the current detection chip outputs a voltage of VCC2+ to the multiplexing module.

[0046] Based on the above embodiment, further, please refer to Figures 3-5The current detection circuit further comprises a feeding inductor and a fuse, a first end of the fuse is connected with the second end of the sampling resistor, a second end of the fuse is connected with a first end of the feeding inductor, and a second end of the feeding inductor is connected with the load to be detected. In the embodiment, the feeding inductor is arranged to stabilize the voltage and the current, ensure the normal operation of the current detection circuit, and improve the anti-interference capability of the current detection circuit, so that the current detection circuit is prevented from being affected by other circuits and external interference. The fuse is arranged to protect the load to be detected from being damaged by the excessive current.

[0047] In some embodiments, the current detection chip can be replaced by a differential amplification circuit. Specifically, the current detection circuit comprises a sampling resistor and a differential amplification circuit, a first end of the sampling resistor is connected with the first DC voltage source, and a second end of the sampling resistor is connected with the load to be detected; a first input end of the differential amplification circuit is connected with the first end of the sampling resistor, a second input end of the differential amplification circuit is connected with the second end of the sampling resistor, and an output end of the differential amplification circuit is separately connected to an input end of the multiplexing module. The differential amplification circuit in the embodiment has the same effect as the current detection chip in the above embodiment, and both detect the voltage across the sampling resistor and output a corresponding voltage signal. The current detection chip has the advantages of accurate measurement and simple structure of the current detection circuit without the need to arrange too many electrical elements (such as resistors, capacitors, etc.), but the current detection chip needs to be arranged with independent DC power supply. Compared with the current detection chip, the differential amplification circuit is realized based on electrical elements, and the differential amplification circuit does not need additional DC power supply and has low cost. It should be understood that the current detection circuit can be flexibly selected according to actual test requirements. In addition to being replaced by the differential amplification circuit, the current detection chip can also be replaced by other circuit structures, electrical elements or functional modules with the same effect.

[0048] In the embodiment of the utility model, please refer to Figure 4 And Figure 5 The comparison module comprises a comparator and a voltage dividing circuit, the voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, a first end of the first voltage dividing resistor is connected with the first DC voltage source, a second end of the first voltage dividing resistor is connected with a first end of the second voltage dividing resistor, and a second end of the second voltage dividing resistor is grounded. A first input end of the comparator is connected with an output end of the multiplexing module, a second input end of the comparator is connected with the second end of the first voltage dividing resistor, and an output end of the comparator is connected with a first end of the control module.

[0049] Based on the above structure, the comparator compares the voltage of the first input end and the second input end, and outputs a voltage analog signal to the control module, since the voltage of the first input end is equal to the voltage of the current detection channel, and the voltage is positively correlated with the current of the current load to be detected, so that the threshold control of the current detection of the load to be detected can be realized by changing the voltage of the second input end.

[0050] In the embodiments of the utility model, please refer to Figure 5 , the voltage provided by the first DC voltage source is VCC1+, the resistance value of the first voltage dividing resistor is Rd1, the resistance value of the second voltage dividing resistor is Rd2, and the voltage of the second input end of the comparator is U 分压 =Rd2 / (Rd1+Rd2)*(VCC1+). According to the above embodiment, under normal circumstances, the voltage of the first input end of the comparator is Un=In*Rn, wherein n is the serial number of the current detection circuit. Since the values of the sampling resistor, the first voltage dividing resistor, the second voltage dividing resistor and the first DC voltage source are known, the current threshold of the current detection can be determined, and the current threshold is Inθ=Rd2 / (Rd1+Rd2)*(VCC1+)*Rn.

[0051] Based on the above current threshold, if the voltage of the first input end of the comparator is less than that of the second input end, that is, In*Rn

[0052] From the determination process of the above current threshold, it can be known that the factors affecting the current threshold include the sampling resistor and the voltage dividing circuit, wherein the voltage dividing circuit is used for providing a voltage signal to the second input end of the comparator, the larger the voltage signal provided by the voltage dividing circuit, the larger the current threshold, and the adjustment of the voltage dividing circuit affects the current threshold of all current detection circuits; and the sampling resistor only affects the current threshold of the current detection circuit, and the larger the sampling resistor, the smaller the current threshold.

[0053] In some embodiments, the resistance values of the sampling resistors in different current detection circuits are different, i.e., the current threshold values of different current detection circuits are different, so that different current detection circuits can detect different types of to-be-tested loads, improving the compatibility and comprehensiveness of the system.

[0054] Correspondingly, in other embodiments, the resistance values of the sampling resistors in all current detection circuits are consistent, and the current detection circuits are used to connect the same type of to-be-tested load, so that the system can simultaneously detect multiple to-be-tested loads in one test period, improving the efficiency of system detection.

[0055] In order to facilitate the rapid adjustment of the current threshold value, the resistor affecting the current threshold value can be selected to be a variable resistor. That is, the sampling resistor in the current detection circuit can be configured as a variable resistor, and the resistance value of the variable resistor can be adjusted, further improving the compatibility and comprehensiveness of the system. Similarly, at least one variable resistor can also be provided in the voltage dividing circuit, i.e., the first voltage dividing resistor and / or the second voltage dividing resistor is a variable resistor, and by adjusting the resistance value of the first voltage dividing resistor and / or the second voltage dividing resistor, the voltage at the second input end of the comparator can be adjusted, and the current threshold value can be adjusted.

[0056] In some embodiments, the current threshold value can also be adjusted by adjusting the first direct current voltage source, which is another factor affecting the voltage at the second input end of the comparator. By setting the first direct current voltage source as an adjustable direct current source, the output voltage value of the first direct current voltage source can be adjusted, i.e., the adjustment of the current threshold value can be realized.

[0057] In the embodiments of the utility model, please refer to Figure 5 The control module comprises a single-chip microcomputer, a first end of the single-chip microcomputer is connected with an output end of the comparison module, and a second end of the single-chip microcomputer is connected with a control interface of the multiplexing module. The single-chip microcomputer should comprise an ADC (analog-digital conversion) function and no less than three IO interfaces. Based on the above configuration, the single-chip microcomputer, the comparison module and the multiplexing module are directly connected, the single-chip microcomputer, the comparison module, the multiplexing module and the current detection circuit can be integrated in one device, which is helpful for the modular design of the system.

[0058] In some specific cases, please refer to Figure 5The single-chip microcomputer and the multiplexing module are connected through an SPI (Serial Peripheral Interface) signal line, the channel switching signal sent by the single-chip microcomputer to the multiplexing module is an SPI signal, the SPI signal line can be composed of three signal lines, correspondingly, the SPI signal can be controlled through binary coding, for example, the number of current detection channels is four, and the corresponding codes of the four channels are 001, 010, 011 and 100 respectively, and the single-chip microcomputer sends the SPI signal of the corresponding code to realize channel switching.

[0059] In further embodiments, referring to Figure 5 The control module further comprises a host computer, and the single-chip microcomputer is in communication connection with the host computer. The single-chip microcomputer converts the voltage analog signal sent by the comparison module into a digital signal and sends it to the host computer, so as to facilitate the identification and processing of the host computer.

[0060] According to the above embodiments, it can be known that the multi-channel current detection control system of the utility model needs multiple different power supply signals, including: a first DC voltage source connected with the comparison module, a second DC voltage source in the current detection circuit and a power supply for the single-chip microcomputer, the current detection chip and the comparator and the like, the voltage values of the multiple power supply signals are not completely consistent, which leads to the complex redundancy of the system circuit structure.

[0061] In order to simplify the circuit structure of the system, the multiple power supply signals can be integrated, specifically, in some embodiments, the system can further comprise a DC power supply module, the DC power supply module comprises at least two different independent power supply output channels, and the DC power supply module is connected with the control module, the comparison module, the multiplexing module and the current detection circuit respectively to provide a DC power supply. That is to say, the above-mentioned DC power supply module is a multi-channel DC power supply, and the multi-channel DC power supply supplies power to multiple functional modules through independent power supply output channels, which helps to reduce the signal interference between modules and improve the accuracy of signal processing.

[0062] Further, the above-mentioned DC power supply module can be set as a multi-channel adjustable DC power supply, that is, the DC power supply module comprises a multi-channel adjustable DC power supply, and at least one independent power supply output channel of the multi-channel adjustable DC power supply is connected with a voltage dividing circuit. The output voltage of each independent power supply output channel of the above-mentioned multi-channel adjustable DC power supply can be adjusted, and after the voltage dividing circuit is connected with an independent power supply output channel, the voltage of the second input end of the comparison module can be adjusted by adjusting the output voltage of the independent power supply output channel, so as to adjust the current threshold.

[0063] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements in the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A multi-channel current sensing control system, characterized by, The system comprises a control module, a comparison module, a multiplexing module and at least two current detection circuits, the multiplexing module comprises one output end and at least two input ends; The input end of the current detection circuit is connected to a load to be tested, and the output end of the current detection circuit is individually connected to one input end of the multiplexing module; The first input end of the comparison module is connected to the output end of the multiplexing module, the second input end of the comparison module is connected to a first direct current voltage source, and the output end of the comparison module is connected to the first end of the control module; The second end of the control module is connected to the control interface of the multiplexing module, and the control module is used for sending a channel switching signal to the multiplexing module.

2. The multi-channel current sensing control system of claim 1, wherein, The current detection circuit comprises a sampling resistor and a current detection chip, the first end of the sampling resistor is connected to a second direct current voltage source, and the second end of the sampling resistor is connected to the load to be tested; The first input end of the current detection chip is connected to the first end of the sampling resistor, the second input end of the current detection chip is connected to the second end of the sampling resistor, and the output end of the current detection chip is individually connected to one input end of the multiplexing module, and the current detection chip is used for outputting a corresponding detection voltage signal according to the voltage value between the two ends of the sampling resistor.

3. The multi-channel current sensing control system of claim 2, wherein, The current detection circuit further comprises a feeding inductor and a fuse, the first end of the fuse is connected to the second end of the sampling resistor, the second end of the fuse is connected to the first end of the feeding inductor, and the second end of the feeding inductor is connected to the load to be tested.

4. The multi-channel current sensing control system of claim 2, wherein, In different current detection circuits, the resistance values of the sampling resistors are different.

5. The multi-channel current sensing control system of any of claims 2-4, wherein, The comparison module comprises a comparator and a voltage dividing circuit, the voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, the first end of the first voltage dividing resistor is connected to the first direct current voltage source, the second end of the first voltage dividing resistor is connected to the first end of the second voltage dividing resistor, and the second end of the second voltage dividing resistor is grounded; The first input end of the comparator is connected to the output end of the multiplexing module, the second input end of the comparator is connected to the second end of the first voltage dividing resistor, and the output end of the comparator is connected to the first end of the control module.

6. The multi-channel current sensing control system of claim 5, wherein, The first voltage dividing resistor and / or the second voltage dividing resistor are variable resistors.

7. The multi-channel current sensing control system of claim 5, wherein, The system further comprises a direct current power supply module, the direct current power supply module comprises at least two different independent power supply output channels, and the direct current power supply module is connected to the control module, the comparison module, the multiplexing module and the current detection circuit to provide direct current power supply.

8. The multi-channel current sensing control system of claim 7, wherein, The direct current power supply module comprises a multipath adjustable direct current power supply, and at least one independent power supply output channel of the multipath adjustable direct current power supply accesses the voltage dividing circuit.

9. The multi-channel current sensing control system of claim 1, wherein, The control module comprises a single-chip microcomputer and an upper computer, the first end of the single-chip microcomputer is connected to the output end of the comparison module, the second end of the single-chip microcomputer is connected to the control interface of the multiplexing module, and the single-chip microcomputer is in communication connection with the upper computer.

10. The multi-channel current sensing control system of claim 1, wherein, The current detection circuit comprises a sampling resistor and a differential amplification circuit, a first end of the sampling resistor is connected to a first direct current voltage source, and a second end of the sampling resistor is connected to the load to be detected. A first input end of the differential amplification circuit is connected to the first end of the sampling resistor, a second input end of the differential amplification circuit is connected to the second end of the sampling resistor, and an output end of the differential amplification circuit is individually connected to one input end of the multiplexing module.

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