Power supply loop testing device

Abstract

The utility model discloses a power supply loop testing device, which comprises a terminal arranged on a PCB (Printed Circuit Board) and used for inserting the power supply loop testing device into a relay universal base; the shunt resistor is arranged on the PCB, is connected in series with the power supply loop and is used for providing a test source; the voltage measuring module is arranged on the PCB, is connected with the shunt resistor and is used for acquiring a voltage signal of the shunt resistor; the voltage measuring module is arranged on the PCB, the analog-to-digital conversion module is arranged on the PCB, the analog-to-digital conversion module is connected with the voltage measuring module and used for converting the voltage signal into a voltage digital signal, and the processor is arranged on the PCB, connected with the analog-to-digital conversion module and used for processing the voltage digital signal to generate a current digital signal. The power supply loop testing device is simple in structure, low in cost and convenient to carry, is suitable for all conventional relay base working electric loops, and can realize direct control of electric appliances and current detection of the electric loops.

Description

Technical Field

[0001] The utility model relates to the technical field of current detection, in particular to a power supply loop testing device. Background Art

[0002] With the continuous increase of automobile functions, on-board plug-in relays are widely used in automobiles. Often, high-power electrical appliances need to use relays to control the operation of electrical appliances. During automobile debugging or fault inspection, the diagnostic instrument needs to send a working signal or use the car computer to operate the relay to attract the electrical appliance before the electrical appliance can start working. In order to verify the function of a certain electrical appliance, the positive and negative poles of the relay base are usually short-circuited directly. This method is unsafe and can only be started and stopped by plugging and unplugging the terminals, which can easily cause the fuse to blow due to excessive instantaneous current. In the current test of automotive electrical appliances, current clamps are often used to monitor the electrical circuit, but using current clamps to detect a single electrical circuit controlled by a relay is very cumbersome and also has safety issues.

[0003] In the related art, a Chinese patent with publication number CN101533043A discloses a vehicle static current test system to support long-term continuous testing of the vehicle static current. It mainly realizes the vehicle wake-up test at any time and long-term continuous testing by setting relays and standard resistors in the vehicle. However, this method can only test the current of the whole vehicle after sleep, and cannot test the static independent working condition current of electrical appliances. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the utility model proposes a power supply circuit test device, which is used to insert the power supply circuit test device into a universal relay base through a terminal arranged on a PCB board, a shunt resistor arranged on the PCB board, the shunt resistor is connected in series on the power supply circuit, and is used to provide a test source, a voltage measurement module arranged on the PCB board, the voltage measurement module is connected to the shunt resistor, and is used to collect the voltage signal of the shunt resistor, an analog-to-digital conversion module arranged on the PCB board, the analog-to-digital conversion module is connected to the voltage measurement module, and is used to convert the voltage signal into a voltage digital signal, and a processor arranged on the PCB board, the processor is connected to the analog-to-digital conversion module, and is used to process the voltage digital signal to generate a current digital signal, so that the device has a simple structure, low cost, is easy to carry, and is suitable for all conventional relay base working power circuits, and can realize direct control of electrical appliances and current detection of power circuits.

[0005] To achieve the above-mentioned purpose, the utility model proposes a power supply circuit test device, comprising: a terminal arranged on a PCB board, used to insert the power supply circuit test device into a universal base of a relay; a shunt resistor arranged on the PCB board, the shunt resistor is connected in series to the power supply circuit, and is used to provide a test source; a voltage measuring module arranged on the PCB board, the voltage measuring module is connected to the shunt resistor, and is used to collect the voltage signal of the shunt resistor; an analog-to-digital conversion module arranged on the PCB board, the analog-to-digital conversion module is connected to the voltage measuring module, and is used to convert the voltage signal into a voltage digital signal; a processor arranged on the PCB board, the processor is connected to the analog-to-digital conversion module, and is used to process the voltage digital signal to generate a current digital signal.

[0006] According to the power supply circuit test device of the utility model, the terminal arranged on the PCB board is used to insert the power supply circuit test device into the universal base of the relay, the shunt resistor arranged on the PCB board, the shunt resistor is connected in series on the power supply circuit, and is used to provide a test source, the voltage measurement module arranged on the PCB board, the voltage measurement module is connected to the shunt resistor, and is used to collect the voltage signal of the shunt resistor, the analog-to-digital conversion module arranged on the PCB board, the analog-to-digital conversion module is connected to the voltage measurement module, and is used to convert the voltage signal into a voltage digital signal, and the processor arranged on the PCB board, the processor is connected to the analog-to-digital conversion module, and is used to process the voltage digital signal to generate a current digital signal. Therefore, the device has a simple structure, low cost, is easy to carry and is suitable for all conventional relay base working power circuits, and can realize direct control of electrical appliances and current detection of power circuits.

[0007] In addition, the power supply circuit test device according to the utility model may also have the following additional technical features:

[0008] Specifically, the device further includes: a display screen, which is connected to the processor and is used to display the current digital signal.

[0009] Specifically, the processor is communicatively connected to an external terminal device so as to send the current digital signal to the external terminal device for display.

[0010] Specifically, the device further includes: a voltage stabilizing module, which is used to convert the direct current of the entire vehicle to power the voltage measuring module and the processor.

[0011] Specifically, the device further includes: a housing, the PCB board is arranged inside the housing, one end of the terminal is arranged on the PCB board, and the other end of the terminal is outside the housing.

[0012] Specifically, the length of the shell is greater than 2 cm.

[0013] Specifically, the device further includes: a switch component, and the switch component is used to switch the working state of the power supply loop testing device.

[0014] Specifically, the switch assembly is arranged on the housing.

[0015] Specifically, the first end and the second end of the terminal are respectively connected to the power supply circuit, and the third end and the fourth end of the terminal are respectively connected to the control circuit.

[0016] Specifically, the terminal is a male terminal.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a block diagram of a power supply circuit testing device according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a power supply circuit testing device according to a specific embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of a housing of a power supply circuit testing device according to an embodiment of the utility model;

[0021] Figure 4 Schematic diagram of the terminals of the power supply circuit testing device according to an embodiment of the present utility model.

[0022] Among them, 10 is a terminal; 20 is a shunt resistor; 30 is a voltage measurement module; 40 is an analog-to-digital conversion module; 50 is a processor; 60 is a PCB board; 70 is a voltage regulator module; 80 is a housing; 90 is a switch component; and a power supply circuit test device 100 is provided. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The power supply circuit testing device provided in the embodiment of the utility model is described below with reference to the accompanying drawings.

[0025] Figure 1 Schematic diagram of a power supply circuit testing device according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the power supply loop testing device 100 of the present invention may include: a terminal 10 (not shown in the figure), a shunt resistor 20 , a voltage measurement module 30 , an analog-to-digital conversion module 40 and a processor 50 .

[0027] Among them, the terminal 10 arranged on the PCB (Printed Circuit Board) board 60 is used to insert the power supply circuit test device 100 into the universal base of the relay. The shunt resistor 20 arranged on the PCB board 60 is connected in series to the power supply circuit and is used to provide a test source. The voltage measurement module 30 arranged on the PCB board 60 is connected to the shunt resistor 20 and is used to collect the voltage signal of the shunt resistor 20. The analog-to-digital conversion module 40 arranged on the PCB board 60 is connected to the voltage measurement module 30 and is used to convert the voltage signal into a voltage digital signal. The processor 50 arranged on the PCB board 60 is connected to the analog-to-digital conversion module 40 and is used to process the voltage digital signal to generate a current digital signal.

[0028] Specifically, the terminal 10 provided on the PCB board 60 is used to insert the power supply circuit test device 100 into the universal base of the relay, which can ensure the retention force of the power supply circuit test device 100 after insertion. After successful insertion, the power supply circuit test device 100 can test the power supply circuit of the relay, such as determining whether there is a circuit break, short circuit or other faults in the power supply circuit of the relay, or verifying whether the relay can work normally when powered on. A shunt resistor 20 is provided on the PCB board 60, and the shunt resistor 20 is connected in series to the power supply circuit to provide a test source, that is, when the current passes through the shunt resistor 20, a voltage drop will be generated, and this voltage drop is proportional to the current passing through the resistor. The shunt resistor 20 is connected in series in the power supply circuit, which means that the current must pass through the shunt resistor 20 to flow through the rest of the circuit, thereby providing a stable voltage source for testing and measuring the current in the circuit. In addition, the shunt resistor 20 can also be used as a protective element of the circuit to limit the current passing through the circuit and prevent overcurrent from damaging other components.

[0029] A voltage measuring module 30 is also provided on the PCB board 60. The voltage measuring module 30 is connected to the shunt resistor 20 and can collect the voltage signal of the shunt resistor 20. That is, the shunt resistor 20 will divide the voltage in the circuit to generate a lower voltage signal proportional to the original circuit voltage. The voltage measuring module 30 receives the divided signal to facilitate the needs of subsequent circuit measurement and control. An analog-to-digital conversion module 40 is also provided on the PCB board 60. The analog-to-digital conversion module 40 is connected to the voltage measuring module 30 and can convert the voltage signal into a voltage digital signal. This conversion is to allow the processor 50 or other digital systems to read, process and analyze the voltage signal, that is, the digital signal is easier to process, store and transmit later. Through analog-to-digital conversion, the voltage signal can be further processed to achieve complex calculations, analysis and decision-making. A processor 50 is also provided on the PCB board 60. The processor 50 is connected to the analog-to-digital conversion module 40 and can process the voltage digital signal to generate a current digital signal. For example, the voltage signal can be converted into a current signal according to known circuit parameters (such as the value of the shunt resistor 20). For example, using Ohm's law, the processor 50 can calculate the actual current value. The processor 50 can not only calculate the current signal, but also use these signals in the feedback loop of the control system to achieve accurate control and regulation. For example, in a power management system, the charging or discharging rate can be adjusted according to the current signal. Thus, a processor 50 is set on the PCB board 60 and connected to the analog-to-digital conversion module 40 to process the voltage digital signal to generate the current digital signal, which not only improves the accuracy and flexibility of the system, but also provides a solid foundation for realizing complex control and monitoring functions.

[0030] In addition, the terminal 10, the shunt resistor 20, the voltage measurement module 30, the analog-to-digital conversion module 40 and the processor 5050 are all arranged on the PCB board 60, which can realize a compact circuit design, reduce the occupation of physical space, and the integrated design can reduce material and manufacturing costs, and reduce the cost of production and assembly. Therefore, the device has a simple structure, low cost, and is easy to carry and is suitable for all conventional relay base working power circuits, and can realize direct control of electrical appliances and current detection of power circuits.

[0031] According to an embodiment of the present invention, the power supply loop testing device 100 further includes: a display screen, which is connected to the processor 50 and is used to display the current digital signal.

[0032] Specifically, the power supply circuit testing device 100 also includes a display screen, which is connected to the processor 50 and can display the current digital signal, that is, the display screen can display the current value in the current circuit in real time, so that the user can directly observe the changes in the current. The intuitive digital display makes the operation easier and the user can more easily obtain the required information. The user can monitor and analyze the data on the display screen and take timely measures when abnormal situations are found to ensure the safe operation of the circuit.

[0033] According to an embodiment of the present invention, the processor 50 is connected to the external terminal device for communication so as to send the current digital signal to the external terminal device for display.

[0034] Specifically, the processor 50 is connected to the external terminal device in communication so as to send the current digital signal to the external terminal device for display, that is, the processor 50 can send the measured current digital signal to the external terminal device through the communication interface to realize data transmission and sharing. For example, remote monitoring can be realized, such as through an external terminal device (such as a computer, a tablet computer or a smart phone), the user can monitor the current condition of the power supply circuit in real time at a remote location. The external terminal device can store the received current data and use special software for further analysis and processing to help the user make more accurate judgments and decisions. Therefore, sending the current digital signal to the external terminal device for display not only enhances the function and application scope of the power supply circuit test device 100, but also improves the user's operating convenience and data processing capabilities, thereby improving the overall performance of the device and user experience.

[0035] According to one embodiment of the utility model, Figure 2 As shown, the power supply circuit testing device 100 further includes: a voltage stabilizing module 70 , which is used to convert the direct current of the vehicle to power the voltage measuring module 30 and the processor 50 .

[0036] Specifically, the power supply circuit test device 100 also includes a voltage stabilizing module 70, which can convert the DC power of the whole vehicle to power the voltage measurement module 30 and the processor 50. For example, the voltage stabilizing module 70 is a voltage stabilizer, which can convert the 12V power of the whole vehicle into the working voltage of the voltage measurement module 30 and the processor 50. Through the adjustment of the voltage stabilizing module 70, the influence of voltage fluctuation on the equipment is avoided, the stability and reliability of the power supply are guaranteed, and the normal operation of the voltage measurement module 30 and the processor 50 is ensured, so that the power supply circuit test device 100 does not need to have its own power supply. In addition, the voltage stabilizing module 70 can protect the voltage measurement module 30 and the processor 50 from overvoltage or undervoltage, extend the service life of the equipment, and improve the safety of the power supply circuit test device 100 through the protection function of the voltage stabilizing module 70.

[0037] According to one embodiment of the utility model, Figure 3 As shown, the power supply circuit test device 100 further includes: a housing 80, a PCB board 60 is disposed in the housing 80, one end of the terminal 10 is disposed on the PCB board 60, and the other end of the terminal 10 is outside the housing 80. The length of the housing 80 is greater than 2 cm.

[0038] Specifically, the power supply circuit test device 100 also includes a housing 80, and the PCB board 60 is arranged in the housing 80. The housing 80 can provide physical protection for the PCB board 60 and other internal components to prevent dust, moisture, collision, etc. in the external environment from damaging the components. The housing 80 not only protects the internal components, but also provides a solid structure, making the entire test device more stable and reliable. One end of the terminal 10 is arranged on the PCB board 60 to ensure the stability of the electrical connection, and the other end of the terminal 10 is outside the housing 80, which is convenient for connection with an external device or a test point to realize signal input or output. In addition, the overall boundary of the housing 80 is adapted to a conventional relay base, and in order to fully load the PCB board 60 and other components of this power supply circuit test device 100, the length of the housing 80 can be longer than that of a conventional plug-in relay. For example, the length of the housing 80 can be greater than 2 cm.

[0039] According to one embodiment of the utility model, Figure 3 As shown, the power supply circuit test device 100 further includes: a switch assembly 90, and the switch assembly 90 is used to switch the working state of the power supply circuit test device 100. The switch assembly 90 is arranged on the housing.

[0040] Specifically, the power supply circuit test device 100 also includes a switch assembly 90, which can switch the working state of the power supply circuit test device 100, that is, the switch assembly 90 can control the power supply of the power supply circuit test device 100, so that the user can turn on or off the device when needed. Through the switch assembly 90, the user can easily control the operating state of the device, simplifying the operation process. The switch assembly 90 may include buttons, toggle switches, rotary switches, etc., and the user can switch the device state through simple operations. In addition, an electronic switch can also be used to achieve more flexible operation through key or touch control. The switch assembly 90 is set on the housing to ensure that the user can easily contact and operate the switch, and the switch position on the housing can be ergonomically designed to ensure comfort and convenience of operation.

[0041] According to one embodiment of the utility model, Figure 4 As shown, the first end and the second end of the terminal 10 are respectively connected to the power supply circuit, and the third end and the fourth end of the terminal 10 are respectively connected to the control circuit, wherein the terminal 10 is a male end.

[0042] Specifically, the first and second ends of the terminal 10 are respectively connected to the power supply circuit, and are connected in series to the internal voltage measurement module 30 to ensure that the current and voltage signals can be detected and measured by the power supply circuit test device 100. The third and fourth ends of the terminal 10 are respectively connected to the control circuit, and the connectivity of this circuit can be controlled by the vehicle control signal to achieve control and regulation of the power supply circuit test device 100, that is, the main function of the third and fourth ends is to receive signals from the control circuit, control the working state, mode and other operations of the equipment, etc., wherein the first and second ends are the two terminals on the inner side, and the third and fourth ends are the two terminals on the outer side. In addition, the terminal 10 uses a male end design, which can be easily connected to the corresponding female end to ensure the standardization and compatibility of the electrical connection, and the male end plug is usually designed to be relatively sturdy, and a stable connection can be formed after being inserted into the female end, reducing the risk of looseness and poor contact.

[0043] Therefore, when using the power supply circuit test device, first ensure that the electrical appliance is not working, unplug the corresponding relay on the fuse box, when the vehicle is in a parked state, determine the power supply circuit that needs to be tested, find the position of the corresponding relay, and unplug the relay when the electrical appliance is not working; insert this device into the corresponding base, ensure that this device is turned off, and insert this device into the position of the original relay; turn on the switch, the electrical appliance starts to work, if there is a number on the display screen, it means that the electrical appliance is working normally, if there is no number on the display screen, it means that the circuit is not connected, check the status of the electrical appliance; check the real-time working current through the display screen, the display screen will display the real-time working current; after the test, turn off the switch, the circuit is disconnected, the electrical appliance stops working, turn off the device switch, there is no number on the display screen, indicating that the electrical appliance has stopped working; unplug this device, and plug the original relay back in, the car electrical box returns to its original state, unplug this device, and restore the entire electrical system to its original state.

[0044] In summary, according to the power supply circuit test device of the utility model, the terminal arranged on the PCB board is used to insert the power supply circuit test device into the universal base of the relay, the shunt resistor arranged on the PCB board, the shunt resistor is connected in series on the power supply circuit, and is used to provide a test source, the voltage measurement module arranged on the PCB board, the voltage measurement module is connected to the shunt resistor, and is used to collect the voltage signal of the shunt resistor, the analog-to-digital conversion module arranged on the PCB board, the analog-to-digital conversion module is connected to the voltage measurement module, and is used to convert the voltage signal into a voltage digital signal, and the processor arranged on the PCB board, the processor is connected to the analog-to-digital conversion module, and is used to process the voltage digital signal to generate a current digital signal. Therefore, the device has a simple structure, low cost, is easy to carry and is suitable for all conventional relay base working power circuits, and can realize direct control of electrical appliances and current detection of power circuits.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A power supply circuit testing device, characterized in that: include: Terminals provided on the PCB board are used to insert the power supply circuit test device into the universal base of the relay; A shunt resistor is arranged on the PCB board, and the shunt resistor is connected in series to the power supply circuit to provide a test source; A voltage measuring module is arranged on the PCB board, the voltage measuring module is connected to the shunt resistor and is used to collect a voltage signal of the shunt resistor; An analog-to-digital conversion module is provided on the PCB board, and the analog-to-digital conversion module is connected to the voltage measurement module and is used to convert the voltage signal into a voltage digital signal. A processor is arranged on the PCB board, the processor is connected to the analog-to-digital conversion module, and is used for processing the voltage digital signal to generate a current digital signal.

2. The power supply circuit testing device according to claim 1, characterized in that: The device also includes: A display screen is connected to the processor and is used to display the current digital signal.

3. The power supply circuit testing device according to claim 1, characterized in that: The processor is communicatively connected to an external terminal device so as to send the current digital signal to the external terminal device for display.

4. The power supply circuit testing device according to claim 1, characterized in that: The device also includes: A voltage stabilizing module is used to convert the direct current of the vehicle to power the voltage measuring module and the processor.

5. The power supply circuit testing device according to claim 1, characterized in that: The device also includes: The PCB board is arranged in the shell, one end of the terminal is arranged on the PCB board, and the other end of the terminal is outside the shell.

6. The power supply circuit testing device according to claim 5, characterized in that: The length of the shell is greater than 2 cm.

7. The power supply circuit testing device according to claim 5, characterized in that: The device also includes: A switch component is used to switch the working state of the power supply loop testing device.

8. The power supply circuit testing device according to claim 7, characterized in that: The switch assembly is arranged on the housing.

9. The power supply circuit testing device according to claim 1, characterized in that: The first end and the second end of the terminal are respectively connected to a power supply circuit, and the third end and the fourth end of the terminal are respectively connected to a control circuit.

10. The power supply circuit testing device according to claim 9, characterized in that: The terminal is a male terminal.

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