Power supply voltage and current monitoring system

Abstract

The utility model provides a power supply voltage and current monitoring system, which comprises a first monitoring circuit for monitoring the output voltage of a power supply, a second monitoring circuit for monitoring the output current of the power supply, a first adjusting module for adjusting the output voltage, a communication module and a remote monitoring module, wherein the second monitoring circuit comprises a self-adaptive resistance circuit capable of dynamically adjusting the resistance based on the temperature of the power supply, and the communication module is connected with the first monitoring circuit and the first adjusting circuit and can generate a first monitoring signal sent to the remote monitoring module. And the remote monitoring module generates a first adjusting signal based on the first monitoring signal and returns the first adjusting signal. The system provided by the utility model can monitor the output voltage and current of the power supply in real time, a user can carry out adjustment through remote monitoring, the requirements of field operation are reduced, the convenience and manageability of the system are improved, potential abnormal conditions can be timely found and processed, and the safety of the power supply system is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supply monitoring, and particularly relates to a power supply voltage and current monitoring system. Background Art

[0002] In modern power systems, the requirements for the stability and reliability of power supplies are getting higher and higher. The output voltage and current of a power supply system are important parameters affecting the system performance and safety. Therefore, it is very important to monitor and adjust them in real time. Today, with the increasing complexity and intelligence of power systems and electronic devices, the requirements for the stability, safety, and manageability of power supplies are also increasing.

[0003] Most traditional power supply monitoring systems focus on the single monitoring of the output voltage, which is realized through a monitoring circuit with fixed parameters, lacking comprehensive consideration of the power supply output current and the working state of the power supply itself. Especially in high-temperature or extreme working environments, the changes in power supply performance are often difficult to be captured and effectively responded to in a timely manner.

[0004] Moreover, the power supply voltage monitoring systems in the prior art usually adopt static monitoring circuits. Although such systems can basically meet the monitoring requirements for voltage stability, they are unable to cope with complex situations such as fluctuations in the power supply output current and performance offsets caused by changes in the internal temperature of the power supply. In addition, most systems lack a flexible adaptive adjustment mechanism and cannot dynamically adjust the monitoring parameters according to the actual working state of the power supply, which limits the accuracy and timeliness of monitoring. Content of the Utility Model

[0005] In order to overcome the defects of the above-mentioned prior art, the utility model provides a power supply voltage and current monitoring system, which includes:

[0006] A first monitoring circuit for monitoring the output voltage value of the power supply;

[0007] A second monitoring circuit for monitoring the output current value of the power supply, including an adaptive resistance circuit physically connected to the power supply, and the adaptive resistance circuit is used to dynamically adjust the resistance based on the temperature of the power supply;

[0008] A first adjustment module for adjusting the output voltage value;

[0009] A communication module, which is respectively connected to the first monitoring circuit and the first adjustment module, and is used to generate a first monitoring signal based on the output voltage value;

[0010] A remote monitoring module, which is signal-connected to the communication module, and is used to receive the first monitoring signal, generate a first adjustment signal for driving the first adjustment module based on the first monitoring signal and send it.

[0011] Specifically, the first monitoring circuit includes a comparator connected to the power supply through a first input terminal, a second input terminal of the comparator is connected to a reference voltage, and an output terminal of the comparator is connected to the communication module.

[0012] Further, the first monitoring circuit further includes a voltage dividing circuit disposed between the power supply and the comparator.

[0013] Specifically, the voltage dividing circuit includes a first resistor and a second resistor. A first end of the first resistor is connected to the power supply, a second end of the first resistor and a first end of the second resistor are commonly connected to the first input terminal of the comparator, and a second end of the second resistor is grounded.

[0014] Preferably, the first adjustment module includes a voltage stabilizing triode, a charge pump, an oscillator, and a filter capacitor. A first input terminal of the charge pump is connected to the output terminal of the comparator through the voltage stabilizing triode, a second input terminal of the charge pump is connected to the oscillator, an output terminal of the charge pump and the power supply are commonly connected to a first end of the filter capacitor, and a second end of the filter capacitor is grounded.

[0015] Optionally, the communication module is further connected to the second monitoring circuit, and the system further includes:

[0016] A second adjustment module, the second adjustment module is connected to the communication module, and the communication module is further configured to generate a second monitoring signal based on the output current value, so that the remote monitoring module receives the second monitoring signal, and generates and sends a second adjustment signal for driving the second adjustment module based on the second monitoring signal.

[0017] Specifically, the second monitoring circuit further includes a current sensor connected to the power supply.

[0018] Preferably, the current sensor includes a high-voltage side coil connected to the power supply, a low-voltage side coil disposed in a sub-circuit, and an iron core magnetic circuit for connecting the high-voltage side coil and the low-voltage side coil. The high-voltage side coil and the low-voltage side coil are respectively connected to the communication module.

[0019] Further, the second adjustment module includes a second feedback loop connected to the communication module.

[0020] Preferably, the remote monitoring module includes a terminal having a display screen and a key. The display screen is configured to display the current output voltage value and the output current value, and the key is configured to generate and send the first adjustment signal and / or the second adjustment signal.

[0021] The utility model has at least the following beneficial effects:

[0022] The system proposed by the present utility model monitors the output voltage and output current of the power supply in real time through the first monitoring circuit and the second monitoring circuit respectively, ensuring immediate grasp of the power supply status. By connecting the communication module with the remote monitoring module, remote monitoring and management of the power supply status can be realized. Without on-site operation, the power supply status can be viewed in real time, alarm information can be received, and remote adjustment can be carried out, greatly improving the management efficiency and response speed. The system adopts a modular design, which is convenient for upgrading, maintenance and expansion. The adaptive resistance circuit in the second monitoring circuit can dynamically adjust the resistance according to the power supply temperature, further improving the accuracy of current monitoring and the overall safety of the system;

[0023] Furthermore, the comparator and voltage dividing circuit in the first monitoring circuit enhance the accuracy and flexibility of voltage monitoring. The first adjustment module adopts a combination of a voltage stabilizing triode, a charge pump, an oscillator and a filter capacitor to realize intelligent adjustment based on the output signal of the comparator, enabling the power supply to provide a stable power supply in cooperation with the charge pump. The current sensor in the second monitoring circuit uses a design with an additional sub-circuit combined with high-voltage side and low-voltage side coils, making current monitoring more accurate and safe, realizing non-contact measurement of current, reducing measurement errors and potential safety hazards;

[0024] In addition, the remote monitoring module can include a terminal with a display screen and buttons, enabling users to intuitively view the current output voltage value and output current value through devices such as mobile phones and tablets, and generate and send adjustment signals through the buttons. The overall operation process is relatively simple and easy to use, improving the user experience, while enhancing the flexibility and operability of the system.

[0025] Thus, the present utility model provides a power supply voltage and current monitoring system. The system proposed by the present utility model can monitor the output voltage and current of the power supply in real time, and users can adjust it through remote monitoring, reducing the need for on-site operation, improving the convenience and manageability of the system, helping to detect and handle potential abnormal situations in a timely manner, and thus improving the safety of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the module structure of the power supply voltage and current monitoring system provided for Embodiment 1;

[0028] Figure 2Schematic diagram of the circuit structures of the first monitoring circuit and the first adjustment module;

[0029] Figure 3 Schematic diagram of the circuit structure of the second monitoring circuit;

[0030] Figure 4 Schematic diagram of the circuit structure of the second adjustment circuit;

[0031] Figure 5 Schematic diagram of the terminal;

[0032] Figure 6 Schematic diagram of the overall structure of the power supply voltage and current monitoring system provided in Embodiment 1.

[0033] Reference numerals

[0034] 1 - Power supply; 2 - First monitoring circuit; 3 - Second monitoring circuit; 4 - First adjustment module; 5 - Communication module; 6 - Remote monitoring module; 7 - Second adjustment module; 8 - Circuit board; 71 - Display screen; 72 - Buttons; 81 - Heat dissipation structure; 82 - Temperature sensor. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0036] Hereinafter, various embodiments of the present utility model will be described more comprehensively. The present utility model can have various embodiments and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present utility model to the specific embodiments disclosed herein, but the present utility model should be understood to cover all adjustments, equivalents, and / or alternative solutions falling within the spirit and scope of the various embodiments of the present utility model.

[0037] Hereinafter, the term "comprising" or "may comprise" which may be used in various embodiments of the present utility model indicates the presence of disclosed functions, operations or elements, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present utility model, the terms "comprising", "having" and their cognates are only intended to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as precluding the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items first.

[0038] In various embodiments of the present utility model, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the recited words. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0039] Expressions (such as "first", "second", etc.) used in various embodiments of the present utility model may modify various constituent elements in various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present utility model, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0040] It should be noted that: in the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, those of ordinary skill in the art need to understand that the terms indicating orientation or positional relationship in the text are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] The terms used in the various embodiments of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the various embodiments of the present utility model. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present utility model belong. The terms (such as those defined in a general use dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or being overly formal unless clearly defined in the various embodiments of the present utility model.

[0043] Embodiment 1

[0044] This embodiment provides a power supply voltage and current monitoring system. Please refer to Figure 1-4 , the system includes:

[0045] A first monitoring circuit 2 for monitoring the output voltage value of the power supply 1;

[0046] A second monitoring circuit 3 for monitoring the output current value of the power supply 1, including an adaptive resistance circuit physically connected to the power supply 1, and the adaptive resistance circuit is used to dynamically adjust the resistance based on the temperature of the power supply 1;

[0047] A first adjustment module 4 for adjusting the output voltage value;

[0048] A communication module 5, the communication module 5 is respectively connected to the first monitoring circuit 2 and the first adjustment module 4, and is used to generate a first monitoring signal based on the output voltage value;

[0049] A remote monitoring module 6, the remote monitoring module 6 is signal-connected to the communication module 5, and is used to receive the first monitoring signal, generate a first adjustment signal for driving the first adjustment module 4 based on the first monitoring signal and send it.

[0050] Specifically, the first monitoring circuit 2 includes a comparator U1 connected to the power supply 1 through a first input terminal. The second input terminal of the comparator U1 is connected to a reference voltage Vref, and the output terminal of the comparator U1 is connected to the communication module 5, so that the communication module 5 can monitor the output voltage of the power supply 1 based on the reference voltage through the comparator U1 and generate a first detection signal.

[0051] Comparator U1 has a limited input voltage range. In order to adjust the output voltage of Power Supply 1 to a voltage level suitable for the input range of Comparator U1, further, the first monitoring circuit 2 further includes a voltage dividing circuit disposed between Power Supply 1 and Comparator U1. In this embodiment, the voltage dividing circuit includes a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to Power Supply 1, and the second end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to the first input terminal of the comparator. The second end of the second resistor R2 is grounded.

[0052] Preferably, the first adjustment module 4 includes a voltage stabilizing triode Q1, a charge pump CP, an oscillator OSC, and a filter capacitor C1. The first input terminal of the charge pump CP is connected to the output terminal of Comparator U1 through the voltage stabilizing triode Q1. The second input terminal of the charge pump CP is connected to the oscillator OSC. The output terminal of the charge pump CP and Power Supply 1 are commonly connected to the first end of the filter capacitor C1. The second end of the filter capacitor C1 is grounded.

[0053] It should be noted that the oscillator OSC can provide a stable clock signal, which is used for the internal circuit of the charge pump CP to enable the charge pump CP to achieve voltage up and down conversion. The charge pump CP can generate a voltage value higher than the voltage VCC of Power Supply 1, so that the system can adjust the connection mode of the resistor network through the instruction of the communication module 5, and change the output voltage of the charge pump in real time, so as to achieve precise adjustment of the output voltage. The filter capacitor C1 can remove high-frequency noise in Power Supply 1, provide a smoother DC voltage, and at the same time help maintain a stable voltage output and reduce the instantaneous voltage fluctuation generated by the operation of the charge pump CP. Therefore, the system proposed in this embodiment can jointly determine the output voltage by Power Supply 1 and the charge pump, and has good safety, stability and flexibility.

[0054] Optionally, the communication module 5 is also connected to the second monitoring circuit 3. The system further includes:

[0055] A second adjustment module 7, the second adjustment module 7 is connected to the communication module 5. The communication module 5 is also used to generate a second monitoring signal based on the output current value, so that the remote monitoring module 6 receives the second monitoring signal, and generates and sends a second adjustment signal for driving the second adjustment module 7 based on the second monitoring signal.

[0056] In a specific embodiment, the adaptive resistance circuit may include a high-precision thermistor RT. The temperature coefficient of the thermistor RT is designed to match the temperature change of Power Supply 1 to ensure that the output voltage of Power Supply 1 remains stable under various temperature conditions.

[0057] Specifically, the second monitoring circuit 3 further includes a current sensor L1 connected to the power supply 1. Preferably, the current sensor L1 includes a high-voltage side coil connected to the power supply 1, a low-voltage side coil disposed on the sub-circuit, and an iron core magnetic circuit for connecting the high-voltage side coil and the low-voltage side coil. The high-voltage side coil and the low-voltage side coil are respectively connected to the communication module 5. The sub-circuit may be provided with a display screen for displaying circuit parameters. The arrangement of the high-voltage side coil and the low-voltage side coil enables the system proposed in this embodiment to measure the current of the power supply 1 with high precision by means of a current transformer. Among them, the high-voltage side coil is used to sense the current of the main circuit, and the low-voltage side coil converts the current on the high-voltage side into a lower-voltage signal through the current transformer, thereby improving the safety and accuracy of the measurement. At the same time, the circuit on the low-voltage side is protected from the direct influence of the high-voltage side current, enhancing the safety of the system.

[0058] Further, the second adjustment module 7 includes a second feedback loop connected to the communication module 5. In this embodiment, the second feedback loop includes a comparator U2, a first transistor Q2, a second transistor Q3, a third transistor Q4, a fourth transistor Q5, a third resistor R3, and a fourth resistor R4. The output terminal of the comparator U2 is connected to the communication module 5. Among them, the first transistor Q2 and the second transistor Q3 may include, but are not limited to, MOS transistors, and the third transistor Q4 and the fourth transistor Q5 may be composed of several triodes.

[0059] It should be noted that the comparator U2 is used to compare the input current value with the reference current value. The output terminal of the comparator U2 is connected to the communication module 5, so that the communication module 5 can monitor the output current of the power supply 1 based on the reference current through the comparator U2 and generate a second detection signal, and control the switching states of the first transistor Q2 and the second transistor Q3 based on the second adjustment signal, thereby adjusting the path of the current flowing through the feedback loop, and the third transistor Q4 and the fourth transistor Q5 can further amplify the feedback signal.

[0060] Preferably, please refer to Figure 5 , the remote monitoring module 6 includes a terminal having a display screen 71 and a button 72. The display screen 71 is used to display the current output voltage value and output current value. The button 72 is used to generate a first adjustment signal and / or a second adjustment signal and send them. In a specific embodiment, the display screen 71 may be configured as a touch screen, and the button 72 may be correspondingly configured as a virtual button on the touch screen.

[0061] Embodiment 2

[0062] This embodiment is another implementation manner of the power supply voltage and current monitoring system proposed in Embodiment 1. Please refer to Figure 6 , in the power supply voltage and current monitoring system proposed in this embodiment, the power supply 1 may be disposed on the circuit board 9, and a heat dissipation structure 91 is disposed outside the power supply 1;

[0063] Preferably, the power supply 1 is connected to a temperature sensor 92 which is connected to the communication module 5. The communication module 5 can output the temperature of the power supply 1 to the remote monitoring module 6 based on the signal sent by the temperature sensor 92.

[0064] In summary, the present utility model provides a power supply voltage and current monitoring system. The system proposed by the present utility model can monitor the output voltage and current of the power supply in real time. Users can adjust it through remote monitoring, reducing the need for on-site operation, improving the convenience and manageability of the system, helping to promptly detect and handle potential abnormal situations, and thus improving the safety of the power supply system.

[0065] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A power supply voltage and current monitoring system, characterized in that, The system includes: A first monitoring circuit for monitoring the output voltage value of the power supply; A second monitoring circuit for monitoring the output current value of the power supply, including an adaptive resistance circuit physically connected to the power supply, and the adaptive resistance circuit is used to dynamically adjust the resistance based on the temperature of the power supply; A first adjustment module for adjusting the output voltage value; A communication module, the communication module is respectively connected to the first monitoring circuit and the first adjustment module, and is used to generate a first monitoring signal based on the output voltage value; A remote monitoring module, the remote monitoring module is signal-connected to the communication module, and is used to receive the first monitoring signal, so as to generate and send a first adjustment signal for driving the first adjustment module based on the first monitoring signal.

2. The system according to claim 1, wherein The first monitoring circuit includes a comparator connected to the power supply through a first input terminal, a second input terminal of the comparator is connected to a reference voltage, and an output terminal of the comparator is connected to the communication module.

3. The system according to claim 2, wherein, The first monitoring circuit further includes a voltage dividing circuit arranged between the power supply and the comparator.

4. The system according to claim 3, wherein The voltage dividing circuit includes a first resistor and a second resistor. A first end of the first resistor is connected to the power supply, a second end of the first resistor and a first end of the second resistor are commonly connected to a first input terminal of the comparator, and a second end of the second resistor is grounded.

5. The system according to any one of claims 2-4, characterized in that, The first adjustment module includes a voltage stabilizing triode, a charge pump, an oscillator and a filter capacitor. A first input terminal of the charge pump is connected to the output terminal of the comparator through the voltage stabilizing triode, a second input terminal of the charge pump is connected to the oscillator, an output terminal of the charge pump and the power supply are commonly connected to a first end of the filter capacitor, and a second end of the filter capacitor is grounded.

6. The system according to claim 1, wherein The communication module is also connected to the second monitoring circuit, and the system further includes: A second adjustment module, the second adjustment module is connected to the communication module, and the communication module is also used to generate a second monitoring signal based on the output current value, so that the remote monitoring module receives the second monitoring signal, and generates and sends a second adjustment signal for driving the second adjustment module based on the second monitoring signal.

7. The system according to claim 6, wherein, The second monitoring circuit further includes a current sensor connected to the power supply.

8. The system according to claim 7, characterized in that The current sensor includes a high-voltage side coil connected to the power supply, a low-voltage side coil arranged in a sub-circuit, and an iron core magnetic circuit for connecting the high-voltage side coil and the low-voltage side coil. The high-voltage side coil and the low-voltage side coil are respectively connected to the communication module.

9. The system according to claim 6, wherein The second adjustment module includes a second feedback loop connected to the communication module.

10. The system according to claim 6, characterized in that The remote monitoring module includes a terminal with a display screen and a button. The display screen is used to display the current output voltage value and the output current value, and the button is used to generate and send the first adjustment signal and / or the second adjustment signal.

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