Current monitoring equipment

Abstract

The utility model relates to the technical field of electronic component testing, in particular to current monitoring equipment, which comprises a sampling module, a peak detection module, a voltage boosting module, an anomaly detection module, two analog-to-digital conversion modules and a data analysis module. The input ends of the peak detection module, the voltage boosting module and the anomaly detection module are all connected with the output end of the sampling module, the input ends of the two analog-to-digital conversion modules are respectively connected with the output ends of the peak detection module and the voltage boosting module, and the output ends of the two analog-to-digital conversion modules are connected with the input end of the data analysis module. According to the utility model, the abnormity detection module rapidly detects whether the voltage signal is abnormal or not so as to facilitate preliminary judgment, in addition, the maximum value of the voltage signal can be obtained through the peak detection module, and the voltage raising module can raise the voltage signal to a range which can be received by the analog-to-digital conversion module and the data analysis module. The display module can display data of the voltage signals, so that a user can check the data conveniently, and practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of electronic component testing technology, and more specifically, to a current monitoring device. Background Technology

[0002] With the rapid development of the automotive industry, automotive electronic systems have become increasingly complex and intelligent. Modern cars integrate a large number of electronic components, which are responsible for controlling various key functions, such as engine management, braking system, airbags, and entertainment system. In the actual operating environment, cars will face various sources of electromagnetic interference, including other electronic devices in the car, external wireless communication, power system, and electrostatic discharge. These interferences may adversely affect the normal operation of automotive electronic components and even endanger driving safety.

[0003] To ensure that automotive electronic components can operate reliably in complex electromagnetic environments, immunity testing has become an essential step. Current monitoring plays a crucial role in immunity testing. By monitoring the current of electronic components during operation, it is possible to understand the current changes when subjected to electromagnetic interference in real time. This helps to detect whether electronic components can maintain a stable current supply under interference, and whether abnormal current fluctuations or malfunctions occur.

[0004] Current monitoring can also provide valuable diagnostic information. When electronic components malfunction during immunity testing, analyzing current monitoring data can help determine the source and extent of interference, allowing for appropriate corrective actions. Furthermore, it's essential to be able to quickly detect anomalies for initial assessment. Utility Model Content

[0005] The purpose of this invention is to provide a current monitoring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A current monitoring device includes a sampling module, a peak detection module, a voltage boosting module, an anomaly detection module, two analog-to-digital conversion modules, and a data analysis module. The input terminals of the peak detection module, the voltage boosting module, and the anomaly detection module are all connected to the output terminal of the sampling module. The input terminals of the two analog-to-digital conversion modules are respectively connected to the output terminals of the peak detection module and the voltage boosting module. The output terminals of the two analog-to-digital conversion modules are connected to the input terminal of the data analysis module.

[0008] The anomaly detection module includes a window comparison circuit and an alarm circuit. The window comparison circuit includes power supply VCC, resistors R10, R11, R12, and R13, operational amplifier U5, operational amplifier U6, diode D3, and diode D4.

[0009] The first terminal of resistor R10 is connected to the power supply VCC. The first terminal of resistor R11 is connected to the second terminal of resistor R10, and the second terminal of resistor R11 is grounded. The inverting input terminal of operational amplifier U5 is connected to the second terminal of resistor R10. The first terminal of resistor R12 is connected to the power supply VCC. The first terminal of resistor R13 is connected to the second terminal of resistor R12, and the second terminal of resistor R13 is grounded. The non-inverting input terminal of operational amplifier U6 is connected to the second terminal of resistor R12. The non-inverting input terminal of operational amplifier U5 and the inverting input terminal of operational amplifier U6 serve as the input terminals of the abnormality detection module. The anode of diode D3 is connected to the output terminal of operational amplifier U5, the anode of diode D4 is connected to the output terminal of operational amplifier U6, and the cathode of diode D3 is connected to the cathode of diode D4.

[0010] Preferably, the sampling module includes a current transformer, an operational amplifier U1, a resistor R1, and a diode D1;

[0011] The current transformer is used to measure the current in the conductor. The two output terminals of the current transformer are connected to the two input terminals of the operational amplifier U1, respectively. The first terminal of the resistor R1 is connected to the inverting input terminal of the operational amplifier U1, and the second terminal of the resistor R1 is connected to the output terminal of the operational amplifier U1. The non-inverting input terminal of the operational amplifier U1 is grounded. The positive terminal of the diode D1 is connected to the output terminal of the operational amplifier U1, and the negative terminal of the diode D1 serves as the output terminal of the sampling module.

[0012] Preferably, the peak detection module includes a resistor R2, an operational amplifier U2, a diode D2, and a capacitor C1;

[0013] The first end of resistor R2 serves as the input terminal of the peak detection module, the second end of resistor R2 is connected to the non-inverting input terminal of operational amplifier U2, the positive terminal of diode D2 is connected to the output terminal of operational amplifier U2, the negative terminal of diode D2 serves as the output terminal of the peak detection module, the inverting input terminal of operational amplifier U2 is connected to the negative terminal of diode D2, the first end of capacitor C1 is connected to the negative terminal of diode D2, and the second end of capacitor C1 is grounded.

[0014] Preferably, the voltage boost module includes resistors R3, R4, R5, R6, R7, R8, and R9, capacitor C2, operational amplifier U3, and operational amplifier U4.

[0015] The first terminal of resistor R3 is connected to the power supply VCC, the second terminal of resistor R3 is connected to the first terminal of resistor R4, and the second terminal of resistor R4 is grounded. The first terminal of capacitor C2 is connected to the second terminal of resistor R3, and the second terminal of capacitor C2 is grounded. The non-inverting input terminal of operational amplifier U3 is connected to the second terminal of resistor R3. The first terminal of resistor R5 is connected to the inverting input terminal of operational amplifier U3, and the second terminal of resistor R5 is connected to the output terminal of operational amplifier U3. The first terminal of resistor R6 is connected to the output terminal of operational amplifier U3, and the second terminal of resistor R6 is connected to the non-inverting input terminal of operational amplifier U4. The first terminal of resistor R7 serves as the input terminal of the voltage boosting module, and the second terminal of resistor R7 is connected to the non-inverting input terminal of operational amplifier U4. The first terminal of resistor R8 is grounded, and the second terminal of resistor R8 is connected to the inverting input terminal of operational amplifier U4. The first terminal of resistor R9 is connected to the inverting input terminal of operational amplifier U4, and the second terminal of resistor R9 is connected to the output terminal of operational amplifier U4. The output terminal of operational amplifier U4 serves as the output terminal of the voltage boosting module.

[0016] Preferably, the alarm circuit in the anomaly detection module includes resistor R14, resistor R15, transistor Q, resistor R16, indicator light L, diode D5, and buzzer HA.

[0017] Resistor R14 is connected to the cathode of diode D4 at its first end and to the base of transistor Q at its second end. Resistor R15 is connected to power supply VCC at its first end and to the base of transistor Q at its second end. Transistor Q's emitter is connected to power supply VCC. Transistor Q's collector is connected to the first end of buzzer HA, and buzzer HA's second end is grounded. Resistor R16 is connected to the collector of transistor Q at its first end and to the first end of indicator light L at its second end, and indicator light L's second end is grounded. Diode D5's anode is grounded, and diode D5's cathode is connected to the collector of transistor Q.

[0018] Preferably, the system also includes a display module, which is signal-connected to the data analysis module.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention converts current signals into voltage signals using a sampling module, and an anomaly detection module quickly detects whether the voltage signal is abnormal, facilitating preliminary judgment. In addition, a peak detection module can obtain the maximum value of the voltage signal, reducing the computational load of the data analysis module. A voltage boosting module can boost the voltage signal to a range that can be received by the analog-to-digital conversion module and the data analysis module. A display module can display the waveform and related data of the voltage signal, making it easy for users to view and enhancing its practicality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a circuit diagram of the sampling module in the utility model.

[0023] Figure 3 This is a circuit diagram of a peak value detection module for a utility model.

[0024] Figure 4 This is a circuit diagram of the voltage boost module in the utility model.

[0025] Figure 5 This is a circuit diagram of the anomaly detection module in the utility model.

[0026] In the picture:

[0027] 1. Sampling module;

[0028] 2. Peak detection module;

[0029] 3. Voltage boost module;

[0030] 4. Anomaly detection module;

[0031] 5. Analog-to-digital conversion module;

[0032] 6. Data Analysis Module;

[0033] 7. Display module. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Please see Figures 1-5 The present invention provides the following technical solution:

[0036] A current monitoring device includes a sampling module 1, a peak detection module 2, a voltage boosting module 3, an anomaly detection module 4, two analog-to-digital converter modules 5, and a data analysis module 6. The input terminals of the peak detection module 2, the voltage boosting module 3, and the anomaly detection module 4 are all connected to the output terminal of the sampling module 1. The input terminals of the two analog-to-digital converter modules 5 are respectively connected to the output terminals of the peak detection module 2 and the voltage boosting module 3. The output terminals of the two analog-to-digital converter modules 5 are connected to the input terminals of the data analysis module 6. The data analysis module 6 can use a DSP or an FPGA.

[0037] The anomaly detection module 4 includes a window comparison circuit and an alarm circuit. The window comparison circuit includes power supply VCC, resistors R10, R11, R12, and R13, operational amplifier U5, operational amplifier U6, diode D3, and diode D4.

[0038] Resistor R10 is connected to power supply VCC at its first end, resistor R11 is connected to resistor R10 at its first end, and resistor R11 at its second end is grounded. Operational amplifier U5's inverting input is connected to resistor R10 at its second end, resistor R12's first end is connected to power supply VCC, resistor R13's first end is connected to resistor R12 at its second end, and resistor R13 at its second end is grounded. Operational amplifier U6's non-inverting input is connected to resistor R12 at its second end. Operational amplifiers U5's non-inverting input and U6's inverting input serve as the input terminals of the anomaly detection module 4. Diode D3's anode is connected to the output terminal of operational amplifier U5, diode D4's anode is connected to the output terminal of operational amplifier U6, and diode D3's cathode is connected to the cathode of diode D4. Operational amplifiers U5 and U6 constitute a window comparator circuit. When the output signal of sampling module 1 is within the reference voltage range of the window comparator circuit, the window comparator circuit outputs a high level; otherwise, it outputs a low level, used for rapid detection of abnormal conditions.

[0039] In this embodiment, the sampling module 1 includes a current transformer, an operational amplifier U1, a resistor R1, and a diode D1;

[0040] The current transformer is used to measure the current in the conductor. The current transformer is sleeved outside the conductor. The two output terminals of the current transformer are connected to the two input terminals of the operational amplifier U1, respectively. The first terminal of the resistor R1 is connected to the inverting input terminal of the operational amplifier U1, and the second terminal of the resistor R1 is connected to the output terminal of the operational amplifier U1. The non-inverting input terminal of the operational amplifier U1 is grounded. The positive terminal of the diode D1 is connected to the output terminal of the operational amplifier U1, and the negative terminal of the diode D1 serves as the output terminal of the sampling module 1, which converts the current signal into a voltage signal for subsequent signal processing.

[0041] Specifically, the peak detection module 2 includes a resistor R2, an operational amplifier U2, a diode D2, and a capacitor C1;

[0042] The first terminal of resistor R2 serves as the input terminal of peak detection module 2, and the second terminal of resistor R2 is connected to the non-inverting input terminal of operational amplifier U2. The positive terminal of diode D2 is connected to the output terminal of operational amplifier U2, and the negative terminal of diode D2 serves as the output terminal of peak detection module 2. The inverting input terminal of operational amplifier U2 is connected to the negative terminal of diode D2. The first terminal of capacitor C1 is connected to the negative terminal of diode D2, and the second terminal of capacitor C1 is grounded. Through the unidirectional conductivity of diode D2, the voltage signal of capacitor C1 is maintained at its maximum value, thereby reducing the computational load of data analysis module 6.

[0043] Furthermore, the voltage boost module 3 includes resistors R3, R4, R5, R6, R7, R8, R9, capacitor C2, operational amplifier U3, and operational amplifier U4.

[0044] Resistor R3 has its first terminal connected to power supply VCC, its second terminal connected to the first terminal of resistor R4, and its second terminal grounded. Capacitor C2 has its first terminal connected to the second terminal of resistor R3, and its second terminal grounded. The non-inverting input of operational amplifier U3 is connected to the second terminal of resistor R3. Resistor R5 has its first terminal connected to the inverting input of operational amplifier U3, and its second terminal connected to the output of operational amplifier U3. Resistor R6 has its first terminal connected to the output of operational amplifier U3, and its second terminal connected to the non-inverting input of operational amplifier U4. Resistor R7 has its first terminal as the input of voltage boosting module 3, and its second terminal connected to the non-inverting input of operational amplifier U4. Resistor R8 has its first terminal grounded, and its second terminal connected to the inverting input of operational amplifier U4. Resistor R9 has its first terminal connected to the inverting input of operational amplifier U4, and its second terminal connected to the output of operational amplifier U4. The output of operational amplifier U4 serves as the output of voltage boosting module 3, used to boost the output signal of sampling module 1 to a suitable range for subsequent processing.

[0045] It is worth noting that the alarm circuit in the anomaly detection module 4 includes resistor R14, resistor R15, transistor Q, resistor R16, indicator light L, diode D5, and buzzer HA.

[0046] Resistor R14 is connected to the cathode of diode D4 at its first terminal and to the base of transistor Q at its second terminal. Resistor R15 is connected to power supply VCC at its first terminal and to the base of transistor Q at its second terminal. Transistor Q's emitter is connected to power supply VCC. Transistor Q's collector is connected to the first terminal of buzzer HA, and buzzer HA's second terminal is grounded. Resistor R16 is connected to the collector of transistor Q at its first terminal and to the first terminal of indicator light L at its second terminal, and indicator light L's second terminal is grounded. Diode D5's anode is grounded, and its cathode is connected to the collector of transistor Q. When transistor Q's base is high, transistor Q is cut off, and buzzer HA does not work. When transistor Q's base is low, transistor Q is turned on, and buzzer HA works to alert the user.

[0047] It is worth noting that a display module 7 is also included. The display module 7 is connected to the data analysis module 6 via a signal. The display module 7 can use an LCD display, an OLED display, or an LED display to display signal waveforms and related data.

[0048] In use, the current monitoring device of this utility model converts the current signal into a voltage signal using the sampling module 1. The input signal of the peak detection module 2 charges the capacitor C1, and since diode D2 only allows current to flow in one direction, capacitor C1 cannot discharge through diode D2, thus maintaining the maximum voltage value of the input signal. Operational amplifier U2 is used to solve the voltage drop problem of diode D2. The operational amplifier U4 and its peripheral circuits in the voltage boosting module 3 form an adder, and operational amplifier U3 and its peripheral circuits form one of the input voltages. The voltage signal output by the sampling module 1 is the other input voltage, boosting the voltage to a suitable range for subsequent processing. The anomaly detection module 4 can perform rapid detection. When the output signal of the peak detection module 2 is within the normal range defined by the window comparison circuit in the anomaly detection module 4, the window voltage circuit outputs a high level, and transistor Q is cut off. Conversely, transistor Q is turned on, and buzzer HA sounds a warning, enabling rapid detection of anomalies. Afterward, the data analysis module 6 can calculate relevant data, and the display module 7 displays the signal waveform and relevant data.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A current monitoring device, characterized in that: It includes a sampling module (1), a peak detection module (2), a voltage boosting module (3), an anomaly detection module (4), two analog-to-digital conversion modules (5) and a data analysis module (6). The input terminals of the peak detection module (2), the voltage boosting module (3) and the anomaly detection module (4) are all connected to the output terminal of the sampling module (1). The input terminals of the two analog-to-digital conversion modules (5) are respectively connected to the output terminals of the peak detection module (2) and the voltage boosting module (3). The output terminals of the two analog-to-digital conversion modules (5) are connected to the input terminal of the data analysis module (6). The anomaly detection module (4) includes a window comparison circuit and an alarm circuit. The window comparison circuit includes power supply VCC, resistors R10, R11, R12, and R13, operational amplifier U5, operational amplifier U6, diode D3, and diode D4. The first end of resistor R10 is connected to power supply VCC, the first end of resistor R11 is connected to the second end of resistor R10, the second end of resistor R11 is grounded, the inverting input of operational amplifier U5 is connected to the second end of resistor R10, the first end of resistor R12 is connected to power supply VCC, the first end of resistor R13 is connected to the second end of resistor R12, the second end of resistor R13 is grounded, the non-inverting input of operational amplifier U6 is connected to the second end of resistor R12, the non-inverting input of operational amplifier U5 and the inverting input of operational amplifier U6 serve as the input terminals of the abnormality detection module (4), the positive terminal of diode D3 is connected to the output terminal of operational amplifier U5, the positive terminal of diode D4 is connected to the output terminal of operational amplifier U6, and the negative terminal of diode D3 is connected to the negative terminal of diode D4.

2. The current monitoring device according to claim 1, characterized in that: The sampling module (1) includes a current transformer, an operational amplifier U1, a resistor R1, and a diode D1; The current transformer is used to measure the current in the conductor. The two output terminals of the current transformer are connected to the two input terminals of the operational amplifier U1 respectively. The first terminal of the resistor R1 is connected to the inverting input terminal of the operational amplifier U1, the second terminal of the resistor R1 is connected to the output terminal of the operational amplifier U1, the non-inverting input terminal of the operational amplifier U1 is grounded, the positive terminal of the diode D1 is connected to the output terminal of the operational amplifier U1, and the negative terminal of the diode D1 is used as the output terminal of the sampling module (1).

3. The current monitoring device according to claim 1, characterized in that: The peak detection module (2) includes a resistor R2, an operational amplifier U2, a diode D2, and a capacitor C1; The first end of resistor R2 serves as the input end of the peak detection module (2), the second end of resistor R2 is connected to the non-inverting input end of operational amplifier U2, the positive terminal of diode D2 is connected to the output end of operational amplifier U2, the negative terminal of diode D2 serves as the output end of the peak detection module (2), the inverting input end of operational amplifier U2 is connected to the negative terminal of diode D2, the first end of capacitor C1 is connected to the negative terminal of diode D2, and the second end of capacitor C1 is grounded.

4. The current monitoring device according to claim 1, characterized in that: The voltage boost module (3) includes resistors R3, R4, R5, R6, R7, R8, and R9, capacitor C2, operational amplifier U3, and operational amplifier U4; The first end of resistor R3 is connected to the power supply VCC, the second end of resistor R3 is connected to the first end of resistor R4, the second end of resistor R4 is grounded, the first end of capacitor C2 is connected to the second end of resistor R3, the second end of capacitor C2 is grounded, the non-inverting input of operational amplifier U3 is connected to the second end of resistor R3, the first end of resistor R5 is connected to the inverting input of operational amplifier U3, the second end of resistor R5 is connected to the output of operational amplifier U3, the first end of resistor R6 is connected to the output of operational amplifier U3, the second end of resistor R6 is connected to the non-inverting input of operational amplifier U4, the first end of resistor R7 is used as the input of the voltage boosting module (3), the second end of resistor R7 is connected to the non-inverting input of operational amplifier U4, the first end of resistor R8 is grounded, the second end of resistor R8 is connected to the inverting input of operational amplifier U4, the first end of resistor R9 is connected to the inverting input of operational amplifier U4, the second end of resistor R9 is connected to the output of operational amplifier U4, and the output of operational amplifier U4 is used as the output of the voltage boosting module (3).

5. The current monitoring device according to claim 1, characterized in that: The alarm circuit in the anomaly detection module (4) includes resistor R14, resistor R15, transistor Q, resistor R16, indicator light L, diode D5 and buzzer HA; Resistor R14 is connected to the cathode of diode D4 at its first end and to the base of transistor Q at its second end. Resistor R15 is connected to power supply VCC at its first end and to the base of transistor Q at its second end. Transistor Q's emitter is connected to power supply VCC. Transistor Q's collector is connected to the first end of buzzer HA, and buzzer HA's second end is grounded. Resistor R16 is connected to the collector of transistor Q at its first end and to the first end of indicator light L at its second end, and indicator light L's second end is grounded. Diode D5's anode is grounded, and diode D5's cathode is connected to the collector of transistor Q.

6. The current monitoring device according to claim 1, characterized in that: It also includes a display module (7), which is signal-connected to the data analysis module (6).

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