Redundant dual power supply fault detection device and power supply

Abstract

The utility model provides a redundant dual power supply fault detection device and a power supply. The output end of the first auxiliary power supply and the output end of the second auxiliary power supply are provided with diodes. The device comprises a first voltage comparison module and a second voltage comparison module, the first input end of the first voltage comparison module is connected with the anode of the first diode, the second input end of the first voltage comparison module is connected with the cathode of the first diode, and the output end of the first voltage comparison module outputs a first fault detection signal; the first input end of the second voltage comparison module is connected with the anode of the second diode, the second input end of the second voltage comparison module is connected with the cathode of the second diode, and the output end of the second voltage comparison module is used for outputting a second fault detection signal. The voltage difference between the two diodes is detected, whether the corresponding auxiliary power supply breaks down is determined according to the voltage difference, and the fault of the auxiliary power supply can be generated in time.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, and particularly relates to a redundant dual - power - supply fault detection device and a power supply. Background Art

[0002] An uninterruptible power supply (UPS) is a device that can continue to supply power to a load to ensure normal power supply to the load when the AC input power supply is abnormal or power - off. The main control board in the UPS is used to control the normal operation of the entire UPS and plays a crucial role in the operation of the UPS.

[0003] In the prior art, to ensure the stability and reliability of the power supply to the main control board, two auxiliary power supplies are usually redundantly paralleled to supply power to the main control board. Since the two auxiliary power supplies are paralleled, when one of the auxiliary power supplies fails, the power supply to the main control board is normal and cannot be detected, reducing the reliability of the power supply to the main control board. Summary of the Utility Model

[0004] Embodiments of the utility model provide a redundant dual - power - supply fault detection device and a power supply to solve the problem that a fault of one of the redundant dual - power supplies cannot be detected in the prior art.

[0005] In a first aspect, embodiments of the utility model provide a redundant dual - power - supply fault detection device. The redundant dual - power - supply fault detection device is used to detect a first auxiliary power supply and a second auxiliary power supply; wherein, a first diode is arranged at the output end of the first auxiliary power supply, and a second diode is arranged at the output end of the second auxiliary power supply; the cathode of the first diode is connected to the cathode of the second diode to supply power to the load; the device includes: a first voltage comparison module and a second voltage comparison module;

[0006] The first input end of the first voltage comparison module is connected to the anode of the first diode, the second input end of the first voltage comparison module is connected to the cathode of the first diode, and the output end of the first voltage comparison module outputs a first fault detection signal;

[0007] The first input end of the second voltage comparison module is connected to the anode of the second diode, the second input end of the second voltage comparison module is connected to the cathode of the second diode, and the output end of the second voltage comparison module is used to output a second fault detection signal.

[0008] Optionally, the first voltage comparison module includes: a first voltage conditioning unit, a second voltage conditioning unit and a first comparison unit;

[0009] The input end of the first voltage conditioning unit serves as the first input end of the first voltage comparison module, and the output end of the first voltage conditioning unit is connected to the first input end of the first comparison unit;

[0010] The input terminal of the second voltage conditioning unit serves as the second input terminal of the first voltage comparison module, and the output terminal of the second voltage conditioning unit is connected to the second input terminal of the first comparison unit;

[0011] The output terminal of the first comparison unit serves as the output terminal of the first voltage comparison module.

[0012] Optionally, the first comparison unit includes: a first comparator, a first resistor, and a second resistor;

[0013] The positive input terminal of the first comparator serves as the first input terminal of the first comparison unit, and the positive input terminal of the first comparator is also connected to the first end of the first resistor;

[0014] The negative input terminal of the first comparator serves as the second input terminal of the first comparison unit;

[0015] The output terminal of the first comparator serves as the output terminal of the first comparison unit, and the output terminal of the first comparator is also respectively connected to the second end of the first resistor and the first end of the second resistor;

[0016] The second end of the second resistor is connected to the first DC power supply.

[0017] Optionally, the first comparison unit further includes: a second comparator, a third resistor, a fourth resistor, and a voltage stabilizing diode;

[0018] The positive input terminal of the second comparator is respectively connected to the output terminal of the first comparator, the second end of the first resistor, and the first end of the second resistor;

[0019] The negative input terminal of the second comparator is connected to the negative input terminal of the first comparator;

[0020] The output terminal of the second comparator is respectively connected to the first end of the third resistor, the cathode of the voltage stabilizing diode, and the first end of the fourth resistor;

[0021] The anode of the voltage stabilizing diode is grounded; the second end of the third resistor is connected to the first DC power supply;

[0022] The second end of the fourth resistor serves as the output terminal of the first comparison unit.

[0023] Optionally, the circuit structure of the first voltage comparison module is the same as that of the second voltage comparison module.

[0024] Optionally, the device further includes: a signal fusion module;

[0025] The first input terminal of the signal fusion module is connected to the output terminal of the first voltage comparison module, the second input terminal of the signal fusion module is connected to the output terminal of the second voltage comparison module, and the output terminal of the signal fusion module is used to output a comprehensive fault detection signal.

[0026] Optionally, the signal fusion module includes: a second comparison unit, a third comparison unit, and a fifth resistor;

[0027] The first input terminal of the second comparison unit serves as the first input terminal of the signal fusion module. The second input terminal of the second comparison unit is used to input a reference signal. The output terminal of the second comparison unit is respectively connected to the output terminal of the third comparison unit and the first end of the fifth resistor;

[0028] The first input terminal of the third comparison unit serves as the second input terminal of the signal fusion module. The second input terminal of the third comparison unit is connected to the second input terminal of the second comparison unit;

[0029] The second end of the fifth resistor is connected to the second DC power supply.

[0030] Optionally, the second comparison unit includes: a third comparator, a sixth resistor, a seventh resistor, and a first capacitor;

[0031] The positive input terminal of the third comparator is respectively connected to the first end of the sixth resistor and the first end of the first capacitor. The negative input terminal of the third comparator serves as the second input terminal of the second comparison unit. The output terminal of the third comparator serves as the output terminal of the second comparison unit;

[0032] The second end of the sixth resistor is connected to the third DC power supply through the seventh resistor. The second end of the sixth resistor also serves as the first input terminal of the second comparison unit;

[0033] The second end of the first capacitor is grounded.

[0034] Optionally, the signal fusion module further includes: a voltage stabilizing and filtering unit;

[0035] The voltage stabilizing and filtering unit is respectively connected to the output terminal of the second comparison unit, the output terminal of the third comparison unit, and the first end of the fourth resistor.

[0036] In a second aspect, an embodiment of the present invention provides a power supply, including any one of the redundant dual - power failure detection devices provided in the embodiments of the first aspect.

[0037] An embodiment of the present utility model provides a redundant dual - power - supply fault detection device and a power supply. The redundant dual - power - supply fault detection device is used to detect a first auxiliary power supply and a second auxiliary power supply; wherein, a first diode is arranged at the output end of the first auxiliary power supply, and a second diode is arranged at the output end of the second auxiliary power supply; the cathode of the first diode is connected to the cathode of the second diode to supply power to the load; the above - mentioned device includes: a first voltage comparison module and a second voltage comparison module; a first input end of the first voltage comparison module is connected to the anode of the first diode, a second input end of the first voltage comparison module is connected to the cathode of the first diode, and an output end of the first voltage comparison module outputs a first fault detection signal; a first input end of the second voltage comparison module is connected to the anode of the second diode, a second input end of the second voltage comparison module is connected to the cathode of the second diode, and an output end of the second voltage comparison module is used to output a second fault detection signal. In the embodiment of the present invention, the voltage differences before and after the two diodes are respectively detected, and whether the corresponding auxiliary power supply is faulty is determined according to the voltage differences. At the same time, the two auxiliary power supplies are detected, so that the faults of the auxiliary power supplies can be found in time, and the stability and reliability of the load power supply are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 FIG. is a schematic circuit structure diagram of a redundant dual - power - supply fault detection device provided by an embodiment of the present utility model;

[0040] Figure 2 FIG. is a schematic circuit diagram of a first voltage comparison module provided by an embodiment of the present utility model;

[0041] Figure 3 FIG. is a schematic circuit diagram of a signal fusion module provided by an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] In order to enable those skilled in the art to better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution with reference to the drawings in the embodiments of this solution. Obviously, the described embodiments are some, but not all, of the embodiments of this solution. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this solution.

[0043] In the description and claims of this solution and the above-mentioned drawings, the term "including" and any other variations thereof mean "including but not limited to", intending to cover non-exclusive inclusion and not limited to the examples listed in the text. In addition, terms such as "first" and "second" are used to distinguish different objects rather than to describe a specific order.

[0044] The implementation of the present utility model will be described in detail with reference to the specific drawings as follows:

[0045] Figure 1 It is a schematic structural diagram of a redundant dual-power supply fault detection device provided for an embodiment of the present utility model. Refer to Figure 1 This redundant dual-power supply fault detection device is used to detect the first auxiliary power supply 1 and the second auxiliary power supply 2. Among them, a first diode D1 is provided at the output end of the first auxiliary power supply 1, and a second diode D2 is provided at the output end of the second auxiliary power supply 2. The cathode of the first diode D1 is connected to the cathode of the second diode D2 to supply power to the load;

[0046] The above-mentioned redundant dual-power supply fault detection device includes: a first voltage comparison module 3 and a second voltage comparison module 4;

[0047] The first input end of the first voltage comparison module 3 is connected to the anode of the first diode D1, the second input end of the first voltage comparison module 3 is connected to the cathode of the first diode D1, and the output end of the first voltage comparison module 3 outputs a first fault detection signal Sig1;

[0048] The first input end of the second voltage comparison module 4 is connected to the anode of the second diode D2, the second input end of the second voltage comparison module 4 is connected to the cathode of the second diode D2, and the output end of the second voltage comparison module 4 is used to output a second fault detection signal Sig2.

[0049] Refer to Figure 1 When the first auxiliary power supply 1 or the second auxiliary power supply 2 is abnormal, since their output ends are in parallel, the load power supply is normal and the abnormality cannot be manifested. However, since diodes are provided at the output ends of both the first auxiliary power supply 1 and the second auxiliary power supply 2, when the auxiliary power supply is abnormal, the voltage difference before and after the diode will change. For example, for the first auxiliary power supply 1; when the first auxiliary power supply 1 is normal, the first diode D1 conducts normally, and the voltage difference across the first diode D1 is about 0.7V; when the first auxiliary power supply 1 fails, the output voltage of the first auxiliary power supply 1 decreases, the voltage at the anode of the first diode D1 is lower than the voltage at the cathode, and the first diode D1 is cut off.

[0050] Based on this, in the embodiment of the present utility model, the first voltage comparison module 3 compares the voltages across the two ends of the first diode D1. For example, when the first auxiliary power supply 1 is normal, the voltage at the first input end of the first voltage comparison module 3 is greater than the voltage at the second input end; when the first auxiliary power supply 1 fails, the voltage at the first input end of the first voltage comparison module 3 is less than the voltage at the second input end. Based on this, the first voltage comparison module 3 determines whether the first auxiliary power supply 1 fails. At the same time, the second voltage comparison module 4 compares the voltages across the two ends of the second diode D2 to determine whether the second auxiliary power supply 2 fails. Thus, the failures of the first auxiliary power supply 1 and the second auxiliary power supply 2 can be detected simultaneously, which is convenient for timely discovering the failures of the auxiliary power supply and improves the stability and reliability of the load power supply.

[0051] In a possible embodiment, referring to Figure 2 , the first voltage comparison module 3 may include: a first voltage conditioning unit 31, a second voltage conditioning unit 32, and a first comparison unit 33;

[0052] The input end (V1) of the first voltage conditioning unit 31 serves as the first input end of the first voltage comparison module 3, and the output end of the first voltage conditioning unit 31 is connected to the first input end of the first comparison unit 33;

[0053] The input end (V2) of the second voltage conditioning unit 32 serves as the second input end of the first voltage comparison module 3, and the output end of the second voltage conditioning unit 32 is connected to the second input end of the first comparison unit 33;

[0054] The output end of the first comparison unit 33 serves as the output end of the first voltage comparison module 3.

[0055] In the embodiment of the present utility model, the first voltage conditioning unit 31 and the second voltage conditioning unit 32 are provided to condition the voltages across the two ends of the first diode D1 so that the voltages across the two ends of the first diode D1 are adapted to the operating voltage of the first comparison unit 33.

[0056] At the same time, when the first auxiliary power supply 1 is normal, the voltage at the first input end of the first voltage comparison module 3 is greater than the voltage at the second input end, and the voltage difference is about 0.7V. The voltage difference is small, which is likely to cause recognition errors. Therefore, conditioning can be performed through the first voltage conditioning unit 31 and the second voltage conditioning unit 32. For example, different ratios of voltage division are performed on the voltages across the two ends of the first diode D1. Referring to Figure 2 , the voltage difference between the first input end and the second input end of the first comparison unit 33 is increased to improve the accuracy of comparison and recognition.

[0057] In a possible implementation manner, the circuit structure of the first voltage conditioning unit 31 may be the same as the circuit structure of the second voltage conditioning unit 32.

[0058] Exemplarily, referring to Figure 2 , both the first voltage conditioning unit 31 and the second voltage conditioning unit 32 can be implemented by resistor voltage division; at the same time, a capacitor can also be set for filtering to reduce interference. For the specific circuit, refer to Figure 2 , which will not be elaborated here.

[0059] In a possible embodiment, referring to Figure 2 , the first comparison unit 33 may include: a first comparator U1, a first resistor R1, and a second resistor R2;

[0060] The positive input terminal of the first comparator U1 serves as the first input terminal of the first comparison unit 33, and the positive input terminal of the first comparator U1 is also connected to the first end of the first resistor R1;

[0061] The negative input terminal of the first comparator U1 serves as the second input terminal of the first comparison unit 33;

[0062] The output terminal of the first comparator U1 serves as the output terminal of the first comparison unit 33, and the output terminal of the first comparator U1 is also respectively connected to the second end of the first resistor R1 and the first end of the second resistor R2;

[0063] The second end of the second resistor R2 is connected to the first DC power supply VCC1.

[0064] When the first auxiliary power supply 1 is normal, the voltage at the positive input terminal of the first comparator U1 is greater than the voltage at the negative input terminal, and the first comparator U1 outputs a high level, that is, the first fault detection signal Sig1 is at a high level; when the first auxiliary power supply 1 fails, the voltage at the positive input terminal of the first comparator U1 is less than the voltage at the negative input terminal, and the first comparator U1 outputs a low level, that is, the first fault detection signal Sig1 is at a low level. Thus, it can be determined whether the first auxiliary power supply 1 fails by the voltage change at the output terminal of the first comparator U1.

[0065] At the same time, in the embodiment of the present invention, the first comparator U1, the first resistor R1, and the second resistor R2 are used to form a hysteresis comparator, and a certain threshold is set to avoid the first fault detection signal Sig1 from fluctuating frequently when the voltage difference across the first diode D1 is at the critical value, affecting the stability of the detection result.

[0066] In a possible embodiment, the first comparison unit 33 may further include: a second comparator U2, a third resistor R3, a fourth resistor R4, and a zener diode Z1;

[0067] The positive input terminal of the second comparator U2 is respectively connected to the output terminal of the first comparator U1, the second end of the first resistor R1, and the first end of the second resistor R2;

[0068] The negative input terminal of the second comparator U2 is connected to the negative input terminal of the first comparator U1;

[0069] The output terminal of the second comparator U2 is respectively connected to the first terminal of the third resistor R3, the cathode of the voltage stabilizing diode Z1, and the first terminal of the fourth resistor R4;

[0070] The anode of the voltage stabilizing diode Z1 is grounded; the second terminal of the third resistor R3 is connected to the first DC power supply VCC1;

[0071] The second terminal of the fourth resistor R4 serves as the output terminal of the first comparison unit 33.

[0072] The first comparison unit 33 is further provided with a second comparator U2. When the first auxiliary power supply 1 is normal, the first comparator U1 outputs a high level, and the second comparator U2 also outputs a high level; when the first auxiliary power supply 1 fails, the first comparator U1 outputs a low level, and the second comparator U2 also outputs a low level, without changing the level of the first fault detection signal Sig1, but isolating through the second comparator U2 to avoid the influence of the backend on the frontend, improving the reliability of the device.

[0073] In a possible implementation manner, the circuit structure of the first voltage comparison module 3 may be the same as that of the second voltage comparison module 4.

[0074] In the embodiment of the present invention, the same circuit structure can be used to detect whether the second auxiliary power supply 2 fails. The first fault detection signal Sig1 and the second fault detection signal Sig2 can be respectively connected to the upper computer, and the upper computer can timely identify the auxiliary power supply fault according to the first fault detection signal Sig1 and the second fault detection signal Sig2, and can accurately locate which auxiliary power supply fails specifically.

[0075] In a possible implementation manner, refer to Figure 3 , the device may further include: a signal fusion module 5;

[0076] The first input terminal of the signal fusion module 5 is connected to the output terminal of the first voltage comparison module 3, the second input terminal of the signal fusion module 5 is connected to the output terminal of the second voltage comparison module 4, and the output terminal of the signal fusion module 5 is used to output a comprehensive fault detection signal.

[0077] In the embodiment of the present invention, for some application scenarios, there is no need to accurately locate which auxiliary power supply fails specifically, and the number of upper computer IO ports is limited, then the first fault detection signal Sig1 and the second fault detection signal Sig2 can be fused to output a comprehensive fault detection signal to indicate that there is an auxiliary power supply fault.

[0078] In a possible implementation manner, refer to Figure 3, the signal fusion module 5 includes: a second comparison unit 51, a third comparison unit 52, and a fifth resistor R5;

[0079] The first input terminal of the second comparison unit 51 serves as the first input terminal of the signal fusion module 5. The second input terminal of the second comparison unit 51 is used to input a reference signal. The output terminal of the second comparison unit 51 is respectively connected to the output terminal of the third comparison unit 52 and the first end of the fifth resistor R5;

[0080] The first input terminal of the third comparison unit 52 serves as the second input terminal of the signal fusion module 5. The second input terminal of the third comparison unit 52 is connected to the second input terminal of the second comparison unit 51;

[0081] The second end of the fifth resistor R5 is connected to the second DC power supply VCC2.

[0082] In the embodiment of the present utility model, the output terminals of the second comparison unit 51 and the third comparison unit 52 are connected to fuse the first fault detection signal Sig1 and the second fault detection signal Sig2.

[0083] Exemplarily, when the first auxiliary power supply 1 is normal, the first fault detection signal Sig1 is at a high level. Due to the existence of the pull-up resistor (the fifth resistor R5), the second comparison unit 51 outputs a high level; when the first auxiliary power supply 1 fails, the first fault detection signal Sig1 is at a low level, and the second comparison unit 51 outputs a low level, and the comprehensive fault detection signal is pulled low.

[0084] Similarly, when the second auxiliary power supply 2 is normal, the second fault detection signal Sig2 is at a high level, and the third comparison unit 52 outputs a high level; when the second auxiliary power supply 2 fails, the second fault detection signal Sig2 is at a low level, and the third comparison unit 52 outputs a low level, and the comprehensive fault detection signal is pulled low.

[0085] It can be seen therefrom that as long as one of the auxiliary power supplies fails, the comprehensive fault detection signal will be pulled low, indicating that there is an auxiliary power supply fault.

[0086] In a possible implementation manner, referring to Figure 3 , the second comparison unit 51 may include: a third comparator U3, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1;

[0087] The positive input terminal of the third comparator U3 is respectively connected to the first end of the sixth resistor R6 and the first end of the first capacitor C1. The negative input terminal of the third comparator U3 serves as the second input terminal of the second comparison unit 51. The output terminal of the third comparator U3 serves as the output terminal of the second comparison unit 51;

[0088] The second terminal of the sixth resistor R6 is connected to the third DC power supply VCC3 through the seventh resistor R7, and the second terminal of the sixth resistor R6 also serves as the first input terminal of the second comparison unit 51;

[0089] The second terminal of the first capacitor C1 is grounded.

[0090] The second comparison unit 51 can be implemented by the third comparator U3, and the specific principle will not be elaborated here.

[0091] Similarly, the circuit structure of the third comparison unit 52 can be the same as that of the second comparison unit 51. For specific reference, Figure 3 .

[0092] In a possible implementation manner, referring to Figure 3 , the signal fusion module 5 may further include: a voltage stabilization and filtering unit 53;

[0093] The voltage stabilization and filtering unit 53 is respectively connected to the output terminal of the second comparison unit 51, the output terminal of the third comparison unit 52, and the first terminal of the fifth resistor R5.

[0094] Specifically, the voltage stabilization and filtering unit 53 can be implemented by a capacitor and a diode, which is used for filtering and voltage stabilization, improving the reliability and stability of the device. The specific principle will not be elaborated here.

[0095] Corresponding to the above embodiments, the embodiment of the present invention also provides a power supply, including the redundant dual - power - supply fault detection device provided in the above embodiments of the present invention, and having the advantages of any of the above redundant dual - power - supply fault detection devices. The details will not be elaborated here.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A redundant dual-power failure detection device, characterized in that, It is used to detect the first auxiliary power supply and the second auxiliary power supply; wherein, a first diode is provided at the output end of the first auxiliary power supply, and a second diode is provided at the output end of the second auxiliary power supply; the cathodes of the first diode and the second diode are connected to supply power to the load; the device includes: a first voltage comparison module and a second voltage comparison module; The first input end of the first voltage comparison module is connected to the anode of the first diode, the second input end of the first voltage comparison module is connected to the cathode of the first diode, and the output end of the first voltage comparison module outputs a first fault detection signal; The first input end of the second voltage comparison module is connected to the anode of the second diode, the second input end of the second voltage comparison module is connected to the cathode of the second diode, and the output end of the second voltage comparison module is used to output a second fault detection signal.

2. The redundant dual-power failure detection device according to claim 1, wherein The first voltage comparison module includes: a first voltage conditioning unit, a second voltage conditioning unit and a first comparison unit; The input end of the first voltage conditioning unit serves as the first input end of the first voltage comparison module, and the output end of the first voltage conditioning unit is connected to the first input end of the first comparison unit; The input end of the second voltage conditioning unit serves as the second input end of the first voltage comparison module, and the output end of the second voltage conditioning unit is connected to the second input end of the first comparison unit; The output end of the first comparison unit serves as the output end of the first voltage comparison module.

3. The redundant dual-power failure detection device according to claim 2, characterized in that, The first comparison unit includes: a first comparator, a first resistor and a second resistor; The positive input end of the first comparator serves as the first input end of the first comparison unit, and the positive input end of the first comparator is also connected to the first end of the first resistor; The negative input end of the first comparator serves as the second input end of the first comparison unit; The output end of the first comparator serves as the output end of the first comparison unit, and the output end of the first comparator is also respectively connected to the second end of the first resistor and the first end of the second resistor; The second end of the second resistor is connected to a first DC power supply.

4. The redundant dual-power failure detection device according to claim 3, wherein The first comparison unit further includes: a second comparator, a third resistor, a fourth resistor and a zener diode; The positive input end of the second comparator is respectively connected to the output end of the first comparator, the second end of the first resistor and the first end of the second resistor; The negative input end of the second comparator is connected to the negative input end of the first comparator; The output end of the second comparator is respectively connected to the first end of the third resistor, the cathode of the zener diode and the first end of the fourth resistor; The anode of the zener diode is grounded; the second end of the third resistor is connected to the first DC power supply; The second end of the fourth resistor serves as the output end of the first comparison unit.

5. The redundant dual-power failure detection device according to any one of claims 1 to 4, characterized in that, The circuit structure of the first voltage comparison module is the same as that of the second voltage comparison module.

6. The redundant dual-power failure detection device according to any one of claims 1 to 4, characterized in that The device further includes: a signal fusion module; The first input terminal of the signal fusion module is connected to the output terminal of the first voltage comparison module, the second input terminal of the signal fusion module is connected to the output terminal of the second voltage comparison module, and the output terminal of the signal fusion module is used to output a comprehensive fault detection signal.

7. The redundant dual-power failure detection device according to claim 6, wherein, The signal fusion module includes: a second comparison unit, a third comparison unit, and a fifth resistor; The first input terminal of the second comparison unit serves as the first input terminal of the signal fusion module, the second input terminal of the second comparison unit is used to input a reference signal, and the output terminal of the second comparison unit is respectively connected to the output terminal of the third comparison unit and the first end of the fifth resistor; The first input terminal of the third comparison unit serves as the second input terminal of the signal fusion module, and the second input terminal of the third comparison unit is connected to the second input terminal of the second comparison unit; The second end of the fifth resistor is connected to a second DC power supply.

8. The redundant dual-power failure detection device according to claim 7, wherein, The second comparison unit includes: a third comparator, a sixth resistor, a seventh resistor, and a first capacitor; The positive input terminal of the third comparator is respectively connected to the first end of the sixth resistor and the first end of the first capacitor, the negative input terminal of the third comparator serves as the second input terminal of the second comparison unit, and the output terminal of the third comparator serves as the output terminal of the second comparison unit; The second end of the sixth resistor is connected to a third DC power supply through the seventh resistor, and the second end of the sixth resistor also serves as the first input terminal of the second comparison unit; The second end of the first capacitor is grounded.

9. The redundant dual-power failure detection device according to claim 7, wherein The signal fusion module further includes: a voltage stabilizing and filtering unit; The voltage stabilizing and filtering unit is respectively connected to the output terminal of the second comparison unit, the output terminal of the third comparison unit, and the first end of the fourth resistor.

10. A power supply, characterized in that, Including the redundant dual - power - supply fault detection device according to any one of claims 1 to 9.

Images