Multipath DC bias overload alarm circuit

Abstract

The utility model relates to the technical field of multipath DC bias overload alarm testing, in particular to a multipath DC bias overload alarm circuit. The alarm circuit comprises four alarm lamps, namely an alarm lamp LED1, an alarm lamp LED2, an alarm lamp LED3 and an alarm lamp LED4; and the four adjustable resistors are respectively an adjustable resistor R1, an adjustable resistor R3, an adjustable resistor R5 and an adjustable resistor R7. The utility model provides a multipath DC bias overload alarm circuit, and aims to solve the problems that the set voltage of a DC power supply is easy to touch by mistake and the stepping voltage is too large in the prior art. By integrating four warning lamps, four adjustable resistors, four cathode input fixed resistors, four anode input fixed resistors, four output pin fixed resistors and an LM324 single-power four-path operational amplifier, the multi-path voltage real-time comparison and overload warning functions are realized.

Description

Technical Field

[0001] This utility model relates to the field of multi-channel DC bias overload alarm testing technology, specifically a multi-channel DC bias overload alarm circuit. Background Technology

[0002] DC bias overload testing verifies whether the input voltage withstand capability of low-voltage products is within the standard design range. Currently, DC power supplies are used to directly power prototypes by setting the voltage, typically using rotary or digitally set DC power supplies. However, rotary power supplies are prone to excessive voltage steps, and digital settings are easily accidentally pressed. Inexperienced testers may set values ​​exceeding the withstand voltage of the DC-DC chip, damaging the prototype. Especially during batch testing, prolonged bias setting can easily lead to incorrect withstand voltage settings and activations. Powering on without timely warnings poses a safety hazard and reduces testing efficiency. Utility Model Content

[0003] This invention addresses the technical problems existing in the prior art by providing a multi-channel DC bias overload alarm circuit to solve the problems of easy false triggering and low efficiency in DC bias overload testing.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A multi-channel DC bias overload alarm circuit is provided, the alarm circuit comprising:

[0006] The four warning lights are LED1, LED2, LED3 and LED4.

[0007] Four adjustable resistors, namely adjustable resistor R1, adjustable resistor R3, adjustable resistor R5 and adjustable resistor R7;

[0008] Four fixed resistors for negative input are R2, R4, R6 and R8.

[0009] Four positive input fixed resistors are R9, R11, R13 and R15.

[0010] The four output pin fixed resistors are R10, R12, R14 and R16.

[0011] The system also includes an LM324 single-supply quad operational amplifier. The alarm circuit compares the four voltages using the quad operational amplifier. When the measured voltage exceeds the set reference voltage, the corresponding alarm light illuminates, thus providing overload alarm for multiple DC bias voltages.

[0012] Furthermore, the alarm lights LED1, LED2, LED3, and LED4 are respectively connected to the output terminals of the four operational amplifiers to display the comparison results between the measured voltage and the four reference voltages V1, V2, V3, and V4. When any of the measured voltages exceeds any of the reference voltages, the corresponding alarm light will be lit.

[0013] Furthermore, the adjustable resistors R1, R3, R5, and R7 are used to adjust the corresponding reference voltages V1, V2, V3, and V4 by adjusting their resistance values, so as to set the bias alarm threshold under different test requirements.

[0014] Furthermore, the negative input fixed resistors R2, R4, R6, and R8 can be replaced with resistors of different values ​​to adjust the corresponding reference voltages V1, V2, V3, and V4, thereby setting the bias alarm threshold under different circuit parameters.

[0015] Furthermore, the four operational amplifiers are used to simultaneously compare the four operational voltages V1, V2, V3 and V4 with the voltage under test. When the voltage under test exceeds any reference voltage, the output of the four operational amplifiers triggers the corresponding alarm light to illuminate.

[0016] Furthermore, the positive input fixed resistors R9, R11, R13, and R15 are connected in series in the input loop to reduce the input current and prevent excessive current from entering the four operational amplifiers.

[0017] Furthermore, the output pin fixed resistors R10, R12, R14, and R16 are connected in series in the output loop to reduce the output current and prevent excessive current from entering the alarm light.

[0018] Furthermore, the four operational amplifiers operate at a voltage range of 3V to 32V to accommodate DC power supplies of different voltage levels.

[0019] Furthermore, the alarm circuit also includes a detection terminal for the input voltage. The detection terminal can be connected to the DC power supply terminal or the prototype DC input circuit to detect the voltage under test in real time, so as to ensure that the alarm circuit can respond in a timely manner and issue an alarm.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a multi-channel DC bias overload alarm circuit. Addressing the problems of accidental voltage setting and excessively large step voltages in existing DC power supply circuits, this circuit integrates four alarm lights, four adjustable resistors, four fixed negative input resistors, four fixed positive input resistors, four fixed output pin resistors, and an LM324 single-supply quad operational amplifier. This achieves real-time comparison of multiple voltages and overload alarm functionality. This circuit not only improves testing safety and prevents damage to the prototype due to improper voltage settings, but also allows for flexible adjustment of the adjustable and fixed resistors, enabling simultaneous setting of multiple bias alarm thresholds, significantly improving testing efficiency. Furthermore, the LM324 single-supply quad operational amplifier has a wide operating voltage range and strong adaptability, effectively reducing input and output current, protecting the operational amplifier and alarm lights from overcurrent damage, and ensuring stable and reliable circuit operation. Attached Figure Description

[0022] Figure 1 The circuit diagram is for the multi-channel DC bias overload alarm circuit of this utility model.

[0023] Figure 2 This is a pin diagram of the LM324 single-supply quad operational amplifier of this utility model;

[0024] Figure 3 This is a schematic diagram of the multi-channel DC bias overload alarm circuit of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The present invention provides the following preferred embodiments:

[0028] Example 1

[0029] To address the issues of accidental activation of the DC power supply setting voltage and excessively large step voltage in existing technologies, this embodiment further optimizes the circuit design of the multi-channel DC bias overload alarm device. This device integrates four alarm lights, four adjustable resistors, four fixed negative input resistors, four fixed positive input resistors, four fixed output pin resistors, and an LM324 single-supply quad operational amplifier to achieve real-time comparison of multiple voltage channels and overload alarm functions.

[0030] like Figure 1 and Figure 2 As shown, the specific implementation method is as follows:

[0031] First, the LM324 single-supply quad operational amplifier was selected as the core component. This device has a wide operating voltage range (3V to 32V) and can adapt to DC power supplies of different voltage levels. Each operational amplifier of the LM324 is connected to an alarm light (LED1, LED2, LED3, LED4) to display the comparison result between the measured voltage and four reference voltages (V1, V2, V3, V4). When any measured voltage exceeds any reference voltage, the corresponding alarm light will illuminate.

[0032] Furthermore, by adjusting the resistance values ​​of the adjustable resistors (R1, R3, R5, R7), the values ​​of the four reference voltages (V1, V2, V3, V4) can be flexibly set to meet the bias alarm threshold settings under different testing requirements. It is important to understand that changes in the resistance values ​​of the adjustable resistors directly affect the magnitude of the reference voltage, thereby affecting the sensitivity and accuracy of the alarm circuit.

[0033] Meanwhile, the resistance values ​​of the negative input fixed resistors (R2, R4, R6, R8) can also be fine-tuned by replacing them with different values ​​to further optimize the reference voltage setting. It is understandable that the selection of the negative input fixed resistor value is closely related to the stability and accuracy of the reference voltage; a reasonable selection of the resistance value can improve the reliability and stability of the alarm circuit.

[0034] To protect the LM324 operational amplifier from damage caused by excessive input current, fixed resistors (R9, R11, R13, R15) are connected in series in the input loop to effectively reduce input current. Furthermore, fixed resistors (R10, R12, R14, R16) are connected in series in the output loop to reduce output current and prevent alarm lights from being damaged by overcurrent.

[0035] In practical applications, the detection terminal of the device is connected to the DC power supply terminal or the DC input circuit of the prototype to monitor the voltage under test in real time. When the voltage under test exceeds the set reference voltage, the corresponding alarm light illuminates, reminding the operator to adjust the voltage setting, thereby avoiding damage to the prototype due to excessive voltage.

[0036] The advantages of this embodiment are that by integrating multi-channel voltage detection and alarm functions, it not only improves test safety and prevents prototype damage due to improper voltage settings, but also allows for flexible adjustment of adjustable and fixed resistors, enabling the simultaneous setting of multiple bias voltage alarm thresholds, significantly improving test efficiency. Furthermore, the LM324 single-supply quad operational amplifier has a wide operating voltage range and strong adaptability, effectively reducing input and output current, protecting the operational amplifier and alarm lights from overcurrent damage, and ensuring circuit stability and reliability.

[0037] Example 2

[0038] like Figure 3 As shown in the figure, this embodiment proposes an implementation process for a multi-channel DC bias overload alarm device. The implementation method steps are as follows:

[0039] Step 1: Begin

[0040] Implementation procedure for activating a multi-channel DC bias overload alarm device.

[0041] Step 2: Connect the device's detection terminal to the DC power supply terminal or the prototype's DC input circuit.

[0042] In this step, the detection end of the device needs to be connected to the power supply end of the DC power supply or the DC input circuit of the prototype in order to detect the voltage being measured in real time.

[0043] Step 3: Connect the VCC voltage (3V-32V) of the LM324 according to the bias test requirements.

[0044] Depending on the specific bias test requirements, connect the appropriate VCC voltage to the LM324 single-supply quad operational amplifier. The LM324 has a wide operating voltage range, selectable from 3V to 32V, to meet the voltage requirements of different test scenarios.

[0045] Step 4: According to the bias voltage test requirements of the prototype, adjust the adjustable resistor to determine the reference voltage.

[0046] In this step, the adjustable resistors R1, R3, R5, and R7 need to be adjusted according to the bias voltage test requirements of the prototype to determine the values ​​of the four reference voltages V1, V2, V3, and V4. This allows users to flexibly set alarm thresholds according to actual needs.

[0047] Step 5: Power on the prototype and monitor the status of the alarm lights.

[0048] When the measured current exceeds the value of any of the four preset reference voltages, the corresponding LED will light up as an alarm. This provides immediate visual feedback, helping operators quickly identify and respond to potential overvoltage situations.

[0049] Step 6: Adjust the input voltage according to the alarm.

[0050] If the alarm light illuminates, it indicates that the measured voltage has exceeded the set reference value. In this case, the operator needs to reduce the input voltage to ensure the safe operation of the prototype and avoid potential damage.

[0051] Step 7: Record test data and end.

[0052] After completing the test, record all relevant test data, including alarm events and adjusted input voltages. This data is crucial for subsequent analysis and reporting. Finally, conclude the implementation process.

[0053] Through the above seven steps, the multi-channel DC bias overload alarm device of this utility model can effectively monitor and respond to overvoltage conditions in the DC power supply or the DC input circuit of the prototype, thereby improving the safety and efficiency of the test.

[0054] The beneficial effects of this utility model are specifically reflected in the fact that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-channel DC bias overload alarm circuit, characterized in that, The alarm circuit includes: The four warning lights are LED1, LED2, LED3 and LED4. Four adjustable resistors, namely adjustable resistor R1, adjustable resistor R3, adjustable resistor R5 and adjustable resistor R7; Four fixed resistors for negative input are R2, R4, R6 and R8. Four positive input fixed resistors are R9, R11, R13 and R15. The four output pin fixed resistors are R10, R12, R14 and R16. The system also includes an LM324 single-supply quad operational amplifier. The alarm circuit compares the four voltages using the quad operational amplifier. When the measured voltage exceeds the set reference voltage, the corresponding alarm light illuminates, thus providing overload alarm for multiple DC bias voltages.

2. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The alarm lights LED1, LED2, LED3, and LED4 are respectively connected to the output terminals of the four operational amplifiers to display the comparison results between the measured voltage and the four reference voltages V1, V2, V3, and V4. When any of the measured voltages exceeds any of the reference voltages, the corresponding alarm light will be lit.

3. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The adjustable resistors R1, R3, R5, and R7 are used to adjust the corresponding reference voltages V1, V2, V3, and V4 by adjusting their resistance values, so as to set the bias alarm threshold under different test requirements.

4. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The negative input fixed resistors R2, R4, R6, and R8 are used to adjust the corresponding reference voltages V1, V2, V3, and V4 by replacing the resistors with different values, so as to set the bias alarm threshold under different circuit parameters.

5. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The four operational amplifiers are used to simultaneously compare four operational voltages V1, V2, V3 and V4 with the voltage under test. When the voltage under test exceeds any reference voltage, the output of the four operational amplifiers triggers the corresponding alarm light to illuminate.

6. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The positive input fixed resistors R9, R11, R13, and R15 are connected in series in the input loop to reduce the input current and prevent excessive current from entering the four operational amplifiers.

7. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The fixed resistors R10, R12, R14, and R16 of the output pins are connected in series in the output loop to reduce the output current and prevent excessive current from entering the alarm light.

8. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The four operational amplifiers operate at voltages ranging from 3V to 32V to accommodate DC power supplies of different voltage levels.

9. The multi-channel DC bias overload alarm circuit as described in claim 1, characterized in that, The alarm circuit also includes a detection terminal for the input voltage. The detection terminal can be connected to the DC power supply terminal or the prototype DC input circuit to detect the voltage under test in real time, so as to ensure that the alarm circuit can respond in a timely manner and issue an alarm.

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