Dual-power-supply in-situ detection alarm circuit

Abstract

The utility model discloses a dual-power in-situ detection alarm circuit, which comprises a power interface, a first detection circuit unit, a second detection circuit unit, an operational circuit unit, an alarm circuit unit and a silencing circuit unit, and is characterized in that the power interface is electrically connected with the first detection circuit unit and the second detection circuit unit; the first detection circuit unit and the second detection circuit unit are both electrically connected with the operational circuit unit, the operational circuit unit is electrically connected with the alarm circuit unit, and the alarm circuit unit is electrically connected with the silencing circuit unit. The device can be realized without a programmable chip, and is low in cost and high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply detection, in particular to a dual power supply in-place detection alarm circuit. Background Art

[0002] In the battery management system of the battery, it is necessary to accurately obtain the external power supply information in order to manage and control the battery charging and discharging. The existing backup power supply and communication equipment interface is a two-wire interface, that is, the charging and discharging of the backup power supply use the same pair of ports. The existing power supply detection and alarm circuit is implemented through a programmable chip, and the purpose of detection and alarm is achieved through the coordination of software and hardware. However, its versatility is not strong and the cost is high. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a dual-power supply on-site detection alarm circuit with low cost and strong versatility.

[0004] The utility model provides a dual-power supply in-place detection alarm circuit, comprising a power supply interface, a first detection circuit unit, a second detection circuit unit, an operation circuit unit, an alarm circuit unit and a mute circuit unit, wherein the power supply interface is electrically connected to the first detection circuit unit and the second detection circuit unit, the first detection circuit unit and the second detection circuit unit are both electrically connected to the operation circuit unit, the operation circuit unit is electrically connected to the alarm circuit unit, and the alarm circuit unit is electrically connected to the mute circuit unit.

[0005] Preferably, the first detection circuit unit includes a first resistor, a second resistor, a third resistor and a first field effect transistor, the first end of the first resistor is used to be electrically connected to a power supply, the second end of the first resistor is electrically connected to the power supply interface and the first end of the second resistor, and the second end of the second resistor is grounded; the first end of the third resistor is electrically connected to the operation circuit unit, the second end of the third resistor is electrically connected to the gate of the first field effect transistor, the source of the first field effect transistor is grounded, and the drain of the first field effect transistor is electrically connected to the second end of the first resistor.

[0006] Preferably, the dual power supply in-place detection alarm circuit also includes a state release circuit unit, and the second detection circuit unit includes a fourth resistor, a fifth resistor, a sixth resistor and a second field effect transistor, the first end of the fourth resistor is used to be electrically connected to the power supply, the second end of the fourth resistor is electrically connected to the power supply interface and the first end of the fifth resistor, and the second end of the fifth resistor is grounded; the first end of the sixth resistor is electrically connected to the operation circuit unit and the state release circuit unit, the second end of the sixth resistor is electrically connected to the gate of the second field effect transistor, the source of the second field effect transistor is grounded, and the drain of the second field effect transistor is electrically connected to the second end of the fourth resistor.

[0007] Preferably, the dual power supply in-place detection alarm circuit also includes a self-locking circuit unit and a state release circuit unit, the self-locking circuit unit is electrically connected to the alarm circuit unit and the mute circuit unit; the state release circuit unit is electrically connected to the first detection circuit unit, the second detection circuit unit and the self-locking circuit unit.

[0008] Preferably, the state release circuit unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a third field effect transistor, a fourth field effect transistor and a fifth field effect transistor, a first end of the seventh resistor is electrically connected to the first detection circuit unit, and a second end of the seventh resistor is electrically connected to the gate of the third field effect transistor; a first end of the eighth resistor is electrically connected to the second detection circuit unit, and a second end of the eighth resistor is electrically connected to the gate of the fourth field effect transistor; a first end of the ninth resistor is used to be electrically connected to a power supply, and a second end of the ninth resistor is electrically connected to the drain of the fourth field effect transistor;

[0009] The first end of the tenth resistor is electrically connected to the second end of the ninth resistor, and the second end of the tenth resistor is electrically connected to the gate of the fifth field effect transistor; the first end of the eleventh resistor is used to be electrically connected to a power supply, and the second end of the eleventh resistor is electrically connected to the drain of the fifth field effect transistor; the source of the third field effect transistor is grounded, the drain of the third field effect transistor is electrically connected to the source of the fourth field effect transistor, and the source of the fifth field effect transistor is electrically connected to the self-locking circuit unit.

[0010] Preferably, the self-locking circuit unit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a sixth field effect transistor and a seventh field effect transistor, the first end of the twelfth resistor is electrically connected to the gate of the sixth field effect transistor, the second end of the twelfth resistor is electrically connected to the first end of the thirteenth resistor; the first end of the thirteenth resistor is electrically connected to the drain of the seventh field effect transistor, and the second end of the thirteenth resistor is electrically connected to the first end of the fourteenth resistor;

[0011] The first end of the fourteenth resistor is electrically connected to the mute circuit unit, and the second end of the fourteenth resistor is electrically connected to the alarm circuit unit; the first end of the fifteenth resistor is electrically connected to the drain of the sixth field effect transistor and the gate of the seventh field effect transistor, and the second end of the fifteenth resistor is grounded; the first end of the sixteenth resistor is electrically connected to the source of the seventh field effect transistor, the second end of the sixteenth resistor is grounded, and the source of the sixth field effect transistor is electrically connected to the source of the fifth field effect transistor.

[0012] Preferably, the operation circuit unit includes a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, an eighth field effect transistor and a ninth field effect transistor, the first end of the seventeenth resistor is used to be electrically connected to a power supply, the second end of the seventeenth resistor is electrically connected to the first end of the eighteenth resistor; the first end of the eighteenth resistor is electrically connected to the drain of the eighth field effect transistor, and the second end of the eighteenth resistor is electrically connected to the alarm circuit unit;

[0013] The first end of the nineteenth resistor is electrically connected to the first end of the sixth resistor, and the second end of the nineteenth resistor is electrically connected to the gate of the eighth field effect transistor; the first end of the twentieth resistor is electrically connected to the first end of the third resistor, and the second end of the twentieth resistor is electrically connected to the gate of the ninth field effect transistor; the source of the eighth field effect transistor is electrically connected to the drain of the ninth field effect transistor, and the source of the ninth field effect transistor is grounded.

[0014] Preferably, the mute circuit unit comprises a reset switch, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a tenth field effect transistor and an eleventh field effect transistor, a first end of the twenty-first resistor is electrically connected to the gate of the tenth field effect transistor, and a second end of the twenty-first resistor is electrically connected to the reset switch; a first end of the twenty-second resistor is used to be electrically connected to a power supply, and a second end of the twenty-second resistor is electrically connected to a first end of the twenty-first resistor;

[0015] The first end of the twenty-third resistor is used to be electrically connected to a power supply, and the second end of the twenty-third resistor is electrically connected to the drain of the tenth field effect transistor; the first end of the twenty-fourth resistor is used to be electrically connected to a power supply, and the second end of the twenty-fourth resistor is electrically connected to the drain of the eleventh field effect transistor and the first end of the fourteenth resistor; the source of the tenth field effect transistor and the source of the eleventh field effect transistor are grounded.

[0016] Preferably, the alarm circuit unit includes a 555 chip, a first diode, a transistor and a speaker, the first pin of the 555 chip is grounded, and the fourth pin of the 555 chip is electrically connected to the second end of the eighteenth resistor; the anode of the first diode is electrically connected to the collector of the transistor, and the cathode of the first diode is used to be electrically connected to a power supply; the base of the transistor is electrically connected to the third pin of the 555 chip, and the emitter of the transistor is grounded; the first connecting pin of the speaker is electrically connected to the anode of the first diode, and the second connecting pin of the speaker is electrically connected to the cathode of the first diode.

[0017] Preferably, the alarm circuit unit also includes a twenty-fifth resistor and a first capacitor, the base of the transistor is electrically connected to the third pin of the 555 chip through the twenty-fifth resistor, the first end of the first capacitor is electrically connected to the base of the transistor, and the second end of the first capacitor is grounded.

[0018] The utility model has the following beneficial effects: the utility model cooperates with the power interface, the first detection circuit unit, the second detection circuit unit, the operation circuit unit, the alarm circuit unit and the mute circuit unit, the power interface is electrically connected to the first detection circuit unit and the second detection circuit unit, the first detection circuit unit and the second detection circuit unit are both electrically connected to the operation circuit unit, the operation circuit unit is electrically connected to the alarm circuit unit, and the alarm circuit unit is electrically connected to the mute circuit unit. Compared with the prior art, the utility model does not require a programmable chip to be implemented, and has low cost and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a circuit diagram of a dual power supply in-place detection alarm circuit. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that, if there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.

[0021] See also Figure 1 The utility model provides a dual power supply in-place detection alarm circuit, including a power supply interface J, a first detection circuit unit 1, a second detection circuit unit 2, an operation circuit unit 3, an alarm circuit unit 4 and a mute circuit unit 5. The power supply interface J is electrically connected to the first detection circuit unit 1 and the second detection circuit unit 2, the first detection circuit unit 1 and the second detection circuit unit 2 are both electrically connected to the operation circuit unit 3, the operation circuit unit 3 is electrically connected to the alarm circuit unit 4, and the alarm circuit unit 4 is electrically connected to the mute circuit unit 5.

[0022] The first detection circuit unit 1 includes a first resistor R1, a second resistor R2, a third resistor R3 and a first field effect transistor Q1. The first end of the first resistor R1 is used to be electrically connected to a power supply, the second end of the first resistor R1 is electrically connected to a power supply interface J and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded. The first end of the third resistor R3 is electrically connected to the operation circuit unit 3, the second end of the third resistor R3 is electrically connected to the gate of the first field effect transistor Q1, the source of the first field effect transistor Q1 is grounded, and the drain of the first field effect transistor Q1 is electrically connected to the second end of the first resistor R1. By turning on or off the first field effect transistor Q1, the detection signal is transmitted to the operation circuit unit 3. The circuit has the advantages of simple structure and high reliability.

[0023] The second detection circuit unit 2 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a second field effect transistor Q2, wherein the first end of the fourth resistor R4 is used to be electrically connected to a power source, the second end of the fourth resistor R4 is electrically connected to the power interface J and the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded. The first end of the sixth resistor R6 is electrically connected to the operation circuit unit 3 and the state release circuit unit 7, the second end of the sixth resistor R6 is electrically connected to the gate of the second field effect transistor Q2, the source of the second field effect transistor Q2 is grounded, and the drain of the second field effect transistor Q2 is electrically connected to the second end of the fourth resistor R4. The detection signal is transmitted to the operation circuit unit 3 by turning on or off the second field effect transistor Q2.

[0024] The dual power supply in-position detection alarm circuit of the utility model further includes a self-locking circuit unit 6 and a state release circuit unit 7. The self-locking circuit unit 6 is electrically connected to the alarm circuit unit 4 and the mute circuit unit 5. The state release circuit unit 7 is electrically connected to the first detection circuit unit 1, the second detection circuit unit 2 and the self-locking circuit unit 6.

[0025] The state release circuit unit 7 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third field effect transistor Q3, a fourth field effect transistor Q4 and a fifth field effect transistor Q5. The first end of the seventh resistor R7 is electrically connected to the first detection circuit unit 1, and the second end of the seventh resistor R7 is electrically connected to the gate of the third field effect transistor Q3. The first end of the eighth resistor R8 is electrically connected to the second detection circuit unit 2, and the second end of the eighth resistor R8 is electrically connected to the gate of the fourth field effect transistor Q4. The first end of the ninth resistor R9 is used to be electrically connected to the power supply, and the second end of the ninth resistor R9 is electrically connected to the drain of the fourth field effect transistor Q4.

[0026] The first end of the tenth resistor R10 is electrically connected to the second end of the ninth resistor R9, and the second end of the tenth resistor R10 is electrically connected to the gate of the fifth field effect transistor Q5. The first end of the eleventh resistor R11 is used to be electrically connected to the power supply, and the second end of the eleventh resistor R11 is electrically connected to the drain of the fifth field effect transistor Q5. The source of the third field effect transistor Q3 is grounded, the drain of the third field effect transistor Q3 is electrically connected to the source of the fourth field effect transistor Q4, and the source of the fifth field effect transistor Q5 is electrically connected to the self-locking circuit unit.

[0027] The self-locking circuit unit 6 includes a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a sixth field effect transistor Q6 and a seventh field effect transistor Q7, wherein a first end of the twelfth resistor R12 is electrically connected to the gate of the sixth field effect transistor Q6, a second end of the twelfth resistor R12 is electrically connected to a first end of the thirteenth resistor R13, a first end of the thirteenth resistor R13 is electrically connected to a drain of the seventh field effect transistor Q7, and a second end of the thirteenth resistor R13 is electrically connected to a first end of the fourteenth resistor R14.

[0028] The first end of the fourteenth resistor R14 is electrically connected to the mute circuit unit 5, and the second end of the fourteenth resistor R14 is electrically connected to the alarm circuit unit. The first end of the fifteenth resistor R15 is electrically connected to the drain of the sixth field effect transistor Q6 and the gate of the seventh field effect transistor Q7, and the second end of the fifteenth resistor R15 is grounded. The first end of the sixteenth resistor R16 is electrically connected to the source of the seventh field effect transistor Q7, the second end of the sixteenth resistor R16 is grounded, and the source of the sixth field effect transistor Q6 is electrically connected to the source of the fifth field effect transistor Q5.

[0029] The operation circuit unit 3 includes a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, an eighth field effect transistor Q8, and a ninth field effect transistor Q9. The first end of the seventeenth resistor R17 is used to be electrically connected to a power supply, and the second end of the seventeenth resistor R17 is electrically connected to the first end of the eighteenth resistor R18. The first end of the eighteenth resistor R18 is electrically connected to the drain of the eighth field effect transistor Q8, and the second end of the eighteenth resistor R18 is electrically connected to the alarm circuit unit 4.

[0030] The first end of the nineteenth resistor R19 is electrically connected to the first end of the sixth resistor R6, and the second end of the nineteenth resistor R19 is electrically connected to the gate of the eighth field effect transistor Q8. The first end of the twentieth resistor R20 is electrically connected to the first end of the third resistor R3, and the second end of the twentieth resistor R20 is electrically connected to the gate of the ninth field effect transistor Q9. The source of the eighth field effect transistor Q8 is electrically connected to the drain of the ninth field effect transistor Q9, and the source of the ninth field effect transistor Q9 is grounded. The operation circuit unit 3 has a simple structure and can significantly reduce the cost compared to the prior art.

[0031] The mute circuit unit 5 includes a reset switch J, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a tenth field effect transistor Q10, and an eleventh field effect transistor Q11, wherein a first end of the twenty-first resistor R21 is electrically connected to the gate of the tenth field effect transistor Q10, and a second end of the twenty-first resistor R21 is electrically connected to the reset switch J. A first end of the twenty-second resistor R22 is used to be electrically connected to a power supply, and a second end of the twenty-second resistor R22 is electrically connected to a first end of the twenty-first resistor R21.

[0032] The first end of the twenty-third resistor R23 is used to be electrically connected to the power supply, and the second end of the twenty-third resistor R23 is electrically connected to the drain of the tenth field effect transistor Q10. The first end of the twenty-fourth resistor R24 ​​is used to be electrically connected to the power supply, and the second end of the twenty-fourth resistor R24 ​​is electrically connected to the drain of the eleventh field effect transistor Q11 and the first end of the fourteenth resistor R14. The source of the tenth field effect transistor Q10 and the source of the eleventh field effect transistor Q11 are grounded. When the reset switch J is pressed, a low state level will be input to the circuit, and the self-locking circuit unit will lock the input low state level to achieve the mute function.

[0033] The alarm circuit unit 4 includes a 555 chip, a first diode D1, a transistor Q12 and a speaker P. The first pin of the 555 chip is grounded, and the fourth pin of the 555 chip is electrically connected to the second end of the eighteenth resistor R18. The anode of the first diode D1 is electrically connected to the collector of the transistor Q12, and the cathode of the first diode D1 is used to be electrically connected to the power supply. The base of the transistor Q12 is electrically connected to the third pin of the 555 chip, and the emitter of the transistor Q12 is grounded. The first connecting pin of the speaker P is electrically connected to the anode of the first diode D1, and the second connecting pin of the speaker P is electrically connected to the cathode of the first diode D1.

[0034] The alarm circuit unit 4 also includes a twenty-fifth resistor R25 and a first capacitor C1, the base of the transistor Q12 is electrically connected to the third pin of the 555 chip through the twenty-fifth resistor R25, the first end of the first capacitor C1 is electrically connected to the base of the transistor Q12, and the second end of the first capacitor C1 is grounded. In addition, the alarm circuit unit 4 also includes a second diode D2, a third diode D3, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a twenty-sixth resistor R26 and a twenty-seventh resistor R27. When only one power source is plugged in, an alarm will be issued, and when two power sources are plugged in, no alarm will be issued.

[0035] In summary, the utility model cooperates with the power interface J, the first detection circuit unit 1, the second detection circuit unit 2, the operation circuit unit 3, the alarm circuit unit 4 and the mute circuit unit 5, the power interface J is electrically connected to the first detection circuit unit 1 and the second detection circuit unit 2, the first detection circuit unit 1 and the second detection circuit unit 2 are both electrically connected to the operation circuit unit 3, the operation circuit unit 3 is electrically connected to the alarm circuit unit 4, and the alarm circuit unit 4 is electrically connected to the mute circuit unit 5. Compared with the prior art, the utility model does not need a programmable chip to be implemented, and has low cost and strong versatility.

[0036] The dual power supply in-place detection alarm circuit provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for those of ordinary skill in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification is only an implementation mode of the utility model, and it does not limit the patent scope of the utility model. All equivalent structures or equivalent process changes made by using the contents of the specification and drawings of the utility model, or directly or indirectly used in other related technical fields, are similarly included in the patent protection scope of the utility model and should not be understood as limitations on the utility model.

Claims

1. A dual power supply in-place detection alarm circuit, characterized in that: It includes a power supply interface, a first detection circuit unit, a second detection circuit unit, an operation circuit unit, an alarm circuit unit and a mute circuit unit, the power supply interface is electrically connected to the first detection circuit unit and the second detection circuit unit, the first detection circuit unit and the second detection circuit unit are both electrically connected to the operation circuit unit, the operation circuit unit is electrically connected to the alarm circuit unit, and the alarm circuit unit is electrically connected to the mute circuit unit.

2. The dual power supply presence detection alarm circuit as claimed in claim 1, characterized in that: The first detection circuit unit includes a first resistor, a second resistor, a third resistor and a first field effect transistor, the first end of the first resistor is used to be electrically connected to a power supply, the second end of the first resistor is electrically connected to the power supply interface and the first end of the second resistor, and the second end of the second resistor is grounded; the first end of the third resistor is electrically connected to the operation circuit unit, the second end of the third resistor is electrically connected to the gate of the first field effect transistor, the source of the first field effect transistor is grounded, and the drain of the first field effect transistor is electrically connected to the second end of the first resistor.

3. The dual power supply presence detection alarm circuit as claimed in claim 1, characterized in that: The dual power supply in-place detection alarm circuit also includes a state release circuit unit, and the second detection circuit unit includes a fourth resistor, a fifth resistor, a sixth resistor and a second field effect transistor, the first end of the fourth resistor is used to be electrically connected to the power supply, the second end of the fourth resistor is electrically connected to the power supply interface and the first end of the fifth resistor, and the second end of the fifth resistor is grounded; the first end of the sixth resistor is electrically connected to the operation circuit unit and the state release circuit unit, the second end of the sixth resistor is electrically connected to the gate of the second field effect transistor, the source of the second field effect transistor is grounded, and the drain of the second field effect transistor is electrically connected to the second end of the fourth resistor.

4. The dual power supply presence detection alarm circuit as claimed in claim 1, characterized in that: The dual power supply in-place detection alarm circuit also includes a self-locking circuit unit and a state release circuit unit, the self-locking circuit unit is electrically connected to the alarm circuit unit and the mute circuit unit; the state release circuit unit is electrically connected to the first detection circuit unit, the second detection circuit unit and the self-locking circuit unit.

5. The dual power supply presence detection alarm circuit as claimed in claim 4, characterized in that: The state release circuit unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a third field effect transistor, a fourth field effect transistor and a fifth field effect transistor, wherein a first end of the seventh resistor is electrically connected to the first detection circuit unit, and a second end of the seventh resistor is electrically connected to a gate of the third field effect transistor; a first end of the eighth resistor is electrically connected to the second detection circuit unit, and a second end of the eighth resistor is electrically connected to a gate of the fourth field effect transistor; a first end of the ninth resistor is used to be electrically connected to a power supply, and a second end of the ninth resistor is electrically connected to a drain of the fourth field effect transistor; The first end of the tenth resistor is electrically connected to the second end of the ninth resistor, and the second end of the tenth resistor is electrically connected to the gate of the fifth field effect transistor; the first end of the eleventh resistor is used to be electrically connected to a power supply, and the second end of the eleventh resistor is electrically connected to the drain of the fifth field effect transistor; the source of the third field effect transistor is grounded, the drain of the third field effect transistor is electrically connected to the source of the fourth field effect transistor, and the source of the fifth field effect transistor is electrically connected to the self-locking circuit unit.

6. The dual power supply presence detection alarm circuit as claimed in claim 5, characterized in that: The self-locking circuit unit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a sixth field effect transistor and a seventh field effect transistor, wherein a first end of the twelfth resistor is electrically connected to a gate of the sixth field effect transistor, a second end of the twelfth resistor is electrically connected to a first end of the thirteenth resistor; a first end of the thirteenth resistor is electrically connected to a drain of the seventh field effect transistor, and a second end of the thirteenth resistor is electrically connected to a first end of the fourteenth resistor; The first end of the fourteenth resistor is electrically connected to the mute circuit unit, and the second end of the fourteenth resistor is electrically connected to the alarm circuit unit; the first end of the fifteenth resistor is electrically connected to the drain of the sixth field effect transistor and the gate of the seventh field effect transistor, and the second end of the fifteenth resistor is grounded; the first end of the sixteenth resistor is electrically connected to the source of the seventh field effect transistor, the second end of the sixteenth resistor is grounded, and the source of the sixth field effect transistor is electrically connected to the source of the fifth field effect transistor.

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