Electric leakage voice alarm device, chip and electronic equipment

Abstract

The utility model provides an electric leakage voice alarm device, a chip and electronic equipment. The electric leakage voice alarm device comprises an alternating current circuit, a current transformer circuit, an operational amplification detection circuit, a voice chip circuit and a control circuit which are connected in sequence. Wherein the output end of the alternating current circuit is connected with the input end of the current transformer circuit, the output end of the current transformer circuit is connected with the input end of the operational amplification detection circuit, and the output end of the operational amplification detection circuit is connected with the input end of the voice chip circuit. The output end of the voice chip circuit is connected with the input end of the control circuit, and the output end of the control circuit is connected with a target circuit. According to the application, the leakage current of a high-voltage electric box or a household circuit can be monitored in real time, and the magnitude of the leakage current is accurately measured by combining the operational amplification detection circuit and the voice chip circuit, so that graded broadcasting and early warning are performed, serious consequences caused by circuit leakage are reduced, and electric appliance damage or accidents are effectively prevented.

Description

Technical Field

[0001] The present application relates to the technical field of integrated circuits, and in particular to a leakage voice alarm device, a chip, and an electronic device. Background Art

[0002] In the existing field of power safety protection, leakage protection technology is a key component in ensuring electricity safety. However, most leakage protection devices on the market have some significant limitations. These products typically rely on current transformers to detect current changes in the circuit. When the leakage current reaches or exceeds the threshold of 20 mA, a signal is triggered, which controls a magnetic latching relay through a thyristor to disconnect the circuit. While this mechanism can prevent leakage accidents to a certain extent, it has some limitations. Existing technology cannot provide any early warning before the leakage current reaches a dangerous threshold, which often catches users off guard when a leakage occurs. Because it relies on reaching a specific threshold to trigger a power outage, it may not be possible to take timely measures in the early stages of a leakage, greatly increasing safety risks. Furthermore, existing technology is generally unable to accurately measure the leakage current, making it impossible to take appropriate measures later.

[0003] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0004] In view of this, the present application provides a leakage voice alarm device, chip and electronic device to solve the defects of the existing technology that it is impossible to predict the circuit status in advance and accurately measure the leakage current.

[0005] The present application provides a leakage voice alarm device, comprising an AC circuit, a current transformer circuit, an operational amplifier detection circuit, a voice chip circuit and a control circuit connected in sequence; wherein, the output end of the AC circuit is connected to the input end of the current transformer circuit, the output end of the current transformer is connected to the input end of the operational amplifier detection circuit, the output end of the operational amplifier detection circuit is connected to the input end of the voice chip circuit, the output end of the voice chip circuit is connected to the input end of the control circuit, and the output end of the control circuit is connected to the target circuit.

[0006] Furthermore, in some embodiments of the present application, the AC circuit is a three-phase AC circuit or a single-phase AC circuit.

[0007] Furthermore, in some embodiments of the present application, the operational amplifier detection circuit includes a first-level operational amplifier unit and a second-level operational amplifier unit, wherein the input end of the first-level operational amplifier unit is connected to the output end of the current transformer circuit, the output end of the first-level operational amplifier unit is connected to the input end of the second-level operational amplifier unit, and the output end of the second-level operational amplifier unit is connected to the input end of the voice chip circuit.

[0008] Further, in some embodiments of the present application, the first-level operational amplifier unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first amplifier; wherein, one end of the first resistor is connected to the first output end of the current transformer circuit, one end of the second resistor is connected to the second output end of the current transformer circuit, the other end of the first resistor is connected to one end of the first capacitor, the other end of the second resistor is connected to one end of the second capacitor, the first end of the first amplifier is respectively connected to the other end of the first capacitor and one end of the third resistor, the other end of the third resistor is respectively connected to one end of the fourth resistor and one end of the fifth resistor, the second end of the first amplifier is respectively connected to the other end of the second capacitor, one end of the sixth resistor, and one end of the third capacitor, the third end of the first amplifier is respectively connected to the other end of the fourth resistor, one end of the fourth capacitor, and one end of the fifth capacitor, the other end of the fourth capacitor is connected to the other end of the fifth capacitor, the fourth end of the first amplifier is grounded, and the fifth end of the first amplifier is respectively connected to the other end of the sixth resistor and the other end of the third capacitor; the fifth end of the first amplifier is also connected to the input end of the second-level operational amplifier unit.

[0009] Further, in some embodiments of the present application, the secondary operational amplifier unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a second amplifier, one end of the sixth capacitor is connected to the fifth end of the first amplifier in the first operational amplifier unit, the other end of the sixth capacitor is respectively connected to one end of the seventh resistor and one end of the seventh capacitor, the first end of the second amplifier is respectively connected to the other end of the seventh resistor, one end of the eighth resistor and one end of the eighth capacitor, the second end of the second amplifier is respectively connected to one end of the ninth resistor and one end of the tenth resistor, the third end of the second amplifier is respectively connected to the other end of the eighth resistor, the other end of the eighth capacitor and the other end of the seventh capacitor, and the third end of the second amplifier is also connected to the input end of the voice chip circuit.

[0010] Furthermore, in some embodiments of the present application, the voice chip circuit includes a voice chip, the first amplifier and the second amplifier are integrated in the voice chip, the first end, the second end, the third end, the fourth end and the fifth end of the first amplifier correspond to the first pin, the second pin, the third pin, the fourth pin and the fifth pin of the voice chip respectively, and the first end, the second end and the third end of the second amplifier correspond to the sixth pin, the seventh pin and the eighth pin of the voice chip respectively.

[0011] Furthermore, in some embodiments of the present application, the voice chip circuit also includes an eighth capacitor, a ninth capacitor, a tenth capacitor and an eleventh capacitor, the ninth pin of the voice chip is connected to one end of the eighth capacitor, the tenth pin of the voice chip is connected to one end of the ninth capacitor, the eleventh pin of the voice chip is connected to the other end of the ninth capacitor, the twelfth pin of the voice chip is respectively connected to one end of the tenth capacitor and one end of the eleventh capacitor, and the other end of the tenth capacitor is connected to the other end of the eleventh capacitor.

[0012] Further, in some embodiments of the present application, the device also includes a power supply circuit, which is connected to the voice chip circuit, wherein the power supply circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first inductor, a second inductor and a power conversion chip, wherein the positive electrode of the first diode is respectively connected to one end of the thirteenth capacitor, one end of the fourteenth capacitor, one end of the eleventh resistor, the positive electrode of the second diode, one end of the first inductor, one end of the fifteenth capacitor, one end of the twelfth resistor and the cathode of the third diode, the cathode of the first diode is connected to the live wire, the positive electrode of the fourth diode is connected to the neutral wire, the cathode of the fourth diode is respectively connected to the other end of the thirteenth capacitor, one end of the second inductor and one end of the thirteenth resistor, and the power conversion chip The first end of the chip is respectively connected to the other end of the second inductor, the other end of the fourteenth capacitor, the other end of the eleventh resistor and the other end of the thirteenth resistor. The second end of the power conversion chip is respectively connected to one end of the sixteenth capacitor, one end of the fourteenth resistor and one end of the fifteenth resistor. The other end of the fourteenth resistor is respectively connected to the cathode of the second diode and one end of the seventeenth capacitor. The third end of the power conversion chip is connected to one end of the eighteenth capacitor. The other end of the eighteenth capacitor is respectively connected to the fourth end, the fifth end, the sixth end and the seventh end of the power conversion chip. The fourth end, the fifth end, the sixth end and the seventh end of the power conversion chip are connected in common. The seventh end of the power conversion chip is respectively connected to the other end of the sixteenth capacitor, the other end of the fifteenth resistor, the other end of the seventeenth capacitor, the other end of the first inductor and the cathode of the fifth diode. The other end of the fifth diode is respectively connected to the other end of the fifteenth capacitor, the other end of the twelfth resistor and the anode of the third diode.

[0013] The present application also provides a chip including the leakage voice alarm device as described above.

[0014] The present application also provides an electronic device, comprising the above-mentioned leakage voice alarm device or the above-mentioned chip.

[0015] The implementation of the embodiments of the present application has the following beneficial effects:

[0016] As described above, the present application provides a leakage voice alarm device, chip, and electronic device, which includes an AC circuit, a current transformer circuit, an operational amplifier detection circuit, a voice chip circuit, and a control circuit connected in sequence; wherein the output end of the AC circuit is connected to the input end of the current transformer circuit, the output end of the current transformer is connected to the input end of the operational amplifier detection circuit, the output end of the operational amplifier detection circuit is connected to the input end of the voice chip circuit, the output end of the voice chip circuit is connected to the input end of the control circuit, and the output end of the control circuit is connected to the target circuit. The present application monitors the current of the AC circuit through the current transformer circuit through the operational amplifier detection circuit. When leakage occurs, the leakage signal will be detected by the operational amplifier detection circuit and the leakage signal will be transmitted to the voice chip circuit, thereby accurately measuring the leakage current size to perform graded broadcast warnings and power outages, avoiding the serious consequences of circuit leakage and effectively preventing electrical damage or accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work.

[0018] Figure 1 This is a schematic diagram of the structure of the current leakage voice alarm device provided in an embodiment of the present application;

[0019] Figure 2 1 is a schematic diagram of the circuit principle of the operational amplifier detection circuit provided in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the circuit principle of the voice chip circuit provided in an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the circuit principle of the power supply circuit provided in an embodiment of the present application.

[0022] Illustrations: 10 - AC circuit; 20 - current transformer circuit; 30 - operational amplifier detection circuit; 40 - voice chip circuit; 50 - control circuit; 31 - primary operational amplifier unit; 32 - secondary operational amplifier unit; R1 - first resistor; R2 - second resistor; R3 - third resistor; R4 - fourth resistor; R5 - fifth resistor; R6 - sixth resistor; R7 - seventh resistor; R8 - eighth resistor; R9 - ninth resistor; R10 - tenth resistor; R11 - eleventh resistor; R12 - twelfth resistor; R13 - thirteenth resistor; R14 - fourteenth resistor; R15 - fifteenth resistor; C1 - first capacitor; C2 - second capacitor; C3 - third capacitor; C4-fourth capacitor; C5-fifth capacitor; C6-sixth capacitor; C7-seventh capacitor; C8-eighth capacitor; C9-ninth capacitor; C10-tenth capacitor; C11-eleventh capacitor; C12-twelfth capacitor; C13-thirteenth capacitor; C14-fourteenth capacitor; C15-fifteenth capacitor; C16-sixteenth capacitor; C17-seventeenth capacitor; C18-eighteenth capacitor; U1-first amplifier; U2-second amplifier; U3-voice chip; U4-power conversion chip; D1-first diode; D2-second diode; D3-third diode; D4-fourth diode; D5-fifth diode; L1-first inductor; L2-second inductor.

[0023] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0025] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0026] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0027] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0028] For building electrical boxes and household circuit protection, most products on the market use current transformers to output a signal to a thyristor-controlled magnetic latching relay when the current exceeds a preset threshold (for example, 20mA), thereby de-energizing the circuit and the equipment. This makes it impossible to predict the circuit condition in advance, and the power may even be cut off after the appliance is damaged.

[0029] In order to solve the above technical problems, the embodiments of the present application provide a leakage voice alarm device, chip and electronic device, which accurately measures the leakage current to perform graded broadcast warnings, reduce the serious consequences of circuit leakage, and effectively prevent electrical damage or accidents.

[0030] Please refer to Figure 1 , Figure 1 This is a structural diagram of a leakage voice alarm device provided in one embodiment of the present application.

[0031] like Figure 1As shown, in this embodiment, a leakage voice alarm device is provided, including an AC circuit 10, a current transformer circuit 20, an operational amplifier detection circuit 30, a voice chip circuit 40 and a control circuit 50 connected in sequence; wherein, the output end of the AC circuit 10 is connected to the input end of the current transformer circuit 20, the output end of the current transformer is connected to the input end of the operational amplifier detection circuit 30, the output end of the operational amplifier detection circuit 30 is connected to the input end of the voice chip circuit 40, the output end of the voice chip circuit 40 is connected to the input end of the control circuit 50, and the output end of the control circuit 50 is connected to the target circuit.

[0032] Furthermore, in some embodiments, the AC circuit is a three-phase AC circuit or a single-phase AC circuit.

[0033] Specifically, in the leakage voice alarm device provided by this embodiment, the operational amplifier detection circuit monitors the current of the AC circuit through the current transformer circuit. The current transformer circuit is used to monitor the current in the circuit. When leakage occurs in the circuit, the current transformer can detect the change in current; the AC circuit can be a three-phase AC circuit or a single-phase AC circuit. When leakage occurs in the three-phase AC or single-phase AC circuit, the leakage signal will be detected by the operational amplifier detection circuit and the leakage signal will be transmitted to the voice chip circuit. The voice chip circuit processes and analyzes the leakage data. The greater the leakage current, the louder the alarm sound will be and the faster the speech speed will be. For example, a three-level voice broadcast warning will be performed. When it exceeds 20mA, the circuit will be powered off, and the power supply to the equipment will also be cut off.

[0034] It can be seen that the leakage voice alarm device provided in this embodiment can monitor the current of high-voltage electrical boxes or household electricity. If a leakage is detected in the circuit, a graded voice broadcast warning will be given according to the size of the leakage current to remind the user that the circuit is abnormal. When the leakage current exceeds 20mA, the circuit will be powered off, instead of powering off only when the leakage current is large enough as in the prior art. This embodiment can accurately measure the size of the leakage current, thereby accurately determining the problem.

[0035] Furthermore, in some embodiments, the operational amplifier detection circuit 30 includes a first-level operational amplifier unit 31 and a second-level operational amplifier unit 32, wherein the input end of the first-level operational amplifier unit 31 is connected to the output end of the current transformer circuit 20, the output end of the first-level operational amplifier unit 31 is connected to the input end of the second-level operational amplifier unit 32, and the output end of the second-level operational amplifier unit 32 is connected to the input end of the voice chip circuit 40.

[0036] Weak signal detection in mutual inductance coils is particularly sensitive to interference. Improper interference handling can lead to larger errors in the detected signal. Furthermore, interference with other product circuits on the mutual inductance coil cannot be introduced, potentially impacting their functionality. To address this issue, this embodiment provides an operational amplifier detection circuit comprised of an operational amplifier. This circuit utilizes a differential input operational amplifier with high input impedance, minimizing the impact on the source signal. This circuit is then combined with capacitors for isolation, thus meeting the aforementioned requirements.

[0037] Specifically, the operational amplifier detection circuit in this embodiment is mainly composed of a first-level operational amplifier unit and a second-level operational amplifier unit. The output end of the first-level operational amplifier unit is connected to the input end of the second-level operational amplifier unit. The first-level operational amplifier unit performs first-level differential amplification, thereby performing small-multiple amplification and filtering processing to extract the target signal, and then the second-level operational amplifier unit performs second-level differential amplification, further performs filtering processing and amplification, and finally the final signal is input into the voice chip circuit for processing.

[0038] Among them, such as Figure 2 As shown, the first-stage operational amplifier unit 31 in this embodiment includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5 and a first amplifier U1; wherein, one end of the first resistor R1 is connected to the first output end of the current transformer circuit 20, one end of the second resistor R2 is connected to the second output end of the current transformer circuit 20, the other end of the first resistor R1 is connected to one end of the first capacitor C1, the other end of the second resistor R2 is connected to one end of the second capacitor C2, and the first end of the first amplifier U1 is respectively connected to the other end of the first capacitor C1 and the third capacitor C2. The first amplifier U1 is connected to one end of the fourth resistor R4, one end of the fourth capacitor C4 and one end of the fifth capacitor C5, and the other end of the fourth capacitor C4 is connected to the other end of the fifth capacitor C5. The fourth end of the first amplifier U1 is grounded, and the fifth end of the first amplifier U1 is connected to the other end of the sixth resistor R6 and the other end of the third capacitor C3. The fifth end of the first amplifier U1 is also connected to the input end of the secondary operational amplifier unit 32.

[0039] Among them, such as Figure 2As shown, the secondary operational amplifier unit 32 in this embodiment includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8 and a second amplifier U2, one end of the sixth capacitor C6 is connected to the fifth end of the first amplifier U1 in the primary operational amplifier unit 31, the other end of the sixth capacitor C6 is respectively connected to one end of the seventh resistor R7 and one end of the seventh capacitor C7, the first end of the second amplifier U2 is respectively connected to the other end of the seventh resistor R7, one end of the eighth resistor R8 and one end of the eighth capacitor C8, the second end of the second amplifier U2 is respectively connected to one end of the ninth resistor R9 and one end of the tenth resistor R10, the third end of the second amplifier U2 is respectively connected to the other end of the eighth resistor R8, the other end of the eighth capacitor C8 and the other end of the seventh capacitor C7, and the third end of the second amplifier U2 is also connected to the input end of the voice chip circuit 40.

[0040] Furthermore, in some embodiments, Figure 3 As shown, the voice chip circuit 40 includes a voice chip U3, a first amplifier U1 and a second amplifier U2 are integrated in the voice chip U3, the first end, the second end, the third end, the fourth end and the fifth end of the first amplifier U1 correspond to the first pin, the second pin, the third pin, the fourth pin and the fifth pin of the voice chip U3 respectively, and the first end, the second end and the third end of the second amplifier U2 correspond to the sixth pin, the seventh pin and the eighth pin of the voice chip U3 respectively.

[0041] In this embodiment, the voice chip circuit specifically includes a voice chip for analyzing leakage electrical signals and performing voice broadcast warnings. The first amplifier and the second amplifier in the operational amplifier detection circuit can be integrated into the voice chip, wherein the first end, second end, third end, fourth end and fifth end of the first amplifier correspond to the first pin, second pin, third pin, fourth pin and fifth pin of the voice chip respectively, and the first end, second end and third end of the second amplifier correspond to the sixth pin, seventh pin and eighth pin of the voice chip respectively.

[0042] Furthermore, in some embodiments, Figure 3 As shown, the voice chip circuit 40 also includes an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and an eleventh capacitor C11. The ninth pin of the voice chip U3 is connected to one end of the eighth capacitor C8, the tenth pin of the voice chip U3 is connected to one end of the ninth capacitor C9, the eleventh pin of the voice chip U3 is connected to the other end of the ninth capacitor C9, the twelfth pin of the voice chip U3 is respectively connected to one end of the tenth capacitor C10 and one end of the eleventh capacitor C11, and the other end of the tenth capacitor C10 is connected to the other end of the eleventh capacitor C11.

[0043] Specifically, the voice chip circuit in this embodiment also includes a voice prompt unit, which uses the WTR096 PWM direct-drive speaker and performs ADC detection on the data output after the op amp through PC1. For example, 10mA starts broadcasting, 13mA speeds up the speech and increases the volume, 17mA speeds up the speech and increases the volume, and at 20mA, it will trigger the output of a signal to the thyristor-controlled magnetic latching relay to cut off the power to the circuit and also cut off the power supply to the device.

[0044] Furthermore, in some embodiments, when the leakage voice alarm device is connected to an 8-ohm 0.5W speaker, the overall maximum power consumption is about 200mA, so it is necessary to design a power supply circuit that can reach 5V / 300mA with a load. Considering the cost and installation environment factors, a non-isolated step-down IC is selected.

[0045] In this regard, the present embodiment provides a leakage voice alarm device further comprising a power supply circuit, which is connected to the voice chip circuit 40. Figure 4As shown, the power supply circuit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a first inductor L1, a second inductor L2 and a power conversion chip, wherein the positive electrode of the first diode D1 is The cathode of the first diode D1 is connected to the live wire, the anode of the fourth diode D4 is connected to the neutral wire, and the cathode of the fourth diode D4 is connected to the other end of the thirteenth capacitor C13, one end of the second inductor L2 and one end of the thirteenth resistor R13. The power conversion chip U4 is connected to the positive electrode of the thirteenth capacitor C13, one end of the second inductor L2 and one end of the thirteenth resistor R13. The first end is respectively connected to the other end of the second inductor L2, the other end of the fourteenth capacitor C14, the other end of the eleventh resistor R11 and the other end of the thirteenth resistor R13. The second end of the power conversion chip U4 is respectively connected to one end of the sixteenth capacitor, one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15. The other end of the fourteenth resistor R14 is respectively connected to the cathode of the second diode D2 and one end of the seventeenth capacitor C17. The third end of the power conversion chip U4 is connected to one end of the eighteenth capacitor C18. The other end of the eighteenth capacitor C18 is respectively connected to the cathode of the second diode D2 and one end of the seventeenth capacitor C17. The fourth, fifth, sixth and seventh terminals of the power conversion chip U4 are respectively connected to the other end of the sixteenth capacitor C16, the other end of the fifteenth resistor R15, the other end of the seventeenth capacitor C17, the other end of the first inductor L1 and the cathode of the fifth diode D5. The other end of the fifth diode D5 is respectively connected to the other end of the fifteenth capacitor C15, the other end of the twelfth resistor R12 and the anode of the third diode D3.

[0046] To sum up, the leakage voice alarm device provided in this embodiment monitors the current of the AC circuit through the operational amplifier detection circuit and the current transformer circuit. When leakage occurs, the leakage signal will be detected by the operational amplifier detection circuit and the leakage signal will be transmitted to the voice chip circuit, thereby accurately measuring the leakage current size for graded broadcast warning and power-off, avoiding the serious consequences caused by circuit leakage and effectively preventing damage to electrical appliances or accidents.

[0047] In other embodiments, a chip is provided, including the leakage voice alarm device as described above.

[0048] In other embodiments, an electronic device is provided, including the leakage voice alarm device or chip as described above.

[0049] That is, the above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made using the contents of the description and drawings of this application, such as the mutual combination of technical features between the various embodiments, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

[0050] In addition, for structural elements with the same or similar characteristics, this application may use the same or different reference numerals to identify them. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0051] In this application, the word "for example" is used to mean "serving as an example, instance, or illustration." Any embodiment described in this application as "for example" is not necessarily to be construed as preferred or advantageous over other embodiments. The above description is provided to enable any person skilled in the art to implement and use this application. In the above description, various details are listed for the purpose of explanation.

[0052] It should be understood that one of ordinary skill in the art will recognize that the present application can be practiced without using these specific details. In other embodiments, well-known structures and processes are not described in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is intended to be consistent with the widest scope consistent with the principles and features disclosed in this application.

Claims

1. A leakage voice alarm device, characterized in that: It includes an AC circuit, a current transformer circuit, an operational amplifier detection circuit, a voice chip circuit and a control circuit connected in sequence; wherein, the output end of the AC circuit is connected to the input end of the current transformer circuit, the output end of the current transformer is connected to the input end of the operational amplifier detection circuit, the output end of the operational amplifier detection circuit is connected to the input end of the voice chip circuit, the output end of the voice chip circuit is connected to the input end of the control circuit, and the output end of the control circuit is connected to the target circuit.

2. The leakage voice alarm device according to claim 1, characterized in that: The AC circuit is a three-phase AC circuit or a single-phase AC circuit.

3. The leakage voice alarm device according to claim 1, characterized in that: The operational amplifier detection circuit includes a first-level operational amplifier unit and a second-level operational amplifier unit, wherein the input end of the first-level operational amplifier unit is connected to the output end of the current transformer circuit, the output end of the first-level operational amplifier unit is connected to the input end of the second-level operational amplifier unit, and the output end of the second-level operational amplifier unit is connected to the input end of the voice chip circuit.

4. The leakage voice alarm device according to claim 3, characterized in that: The first-level operational amplifier unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first amplifier; wherein one end of the first resistor is connected to the first output end of the current transformer circuit, one end of the second resistor is connected to the second output end of the current transformer circuit, the other end of the first resistor is connected to one end of the first capacitor, the other end of the second resistor is connected to one end of the second capacitor, a first end of the first amplifier is respectively connected to the other end of the first capacitor and one end of the third resistor, the other end of the third resistor is respectively connected to one end of the fourth resistor and one end of the fifth resistor, a second end of the first amplifier is respectively connected to the other end of the second capacitor, one end of the sixth resistor, and one end of the third capacitor, a third end of the first amplifier is respectively connected to the other end of the fourth resistor, one end of the fourth capacitor, and one end of the fifth capacitor, the other end of the fourth capacitor is connected to the other end of the fifth capacitor, a fourth end of the first amplifier is grounded, and a fifth end of the first amplifier is respectively connected to the other end of the sixth resistor and the other end of the third capacitor; the fifth end of the first amplifier is also connected to the input end of the second-level operational amplifier unit.

5. The leakage voice alarm device according to claim 4, characterized in that: The secondary operational amplifier unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a second amplifier. One end of the sixth capacitor is connected to the fifth end of the first amplifier in the primary operational amplifier unit, and the other end of the sixth capacitor is respectively connected to one end of the seventh resistor and one end of the seventh capacitor. The first end of the second amplifier is respectively connected to the other end of the seventh resistor, one end of the eighth resistor and one end of the eighth capacitor. The second end of the second amplifier is respectively connected to one end of the ninth resistor and one end of the tenth resistor. The third end of the second amplifier is respectively connected to the other end of the eighth resistor, the other end of the eighth capacitor and the other end of the seventh capacitor. The third end of the second amplifier is also connected to the input end of the voice chip circuit.

6. The leakage voice alarm device according to claim 5, characterized in that: The voice chip circuit includes a voice chip, the first amplifier and the second amplifier are integrated in the voice chip, the first end, the second end, the third end, the fourth end and the fifth end of the first amplifier correspond to the first pin, the second pin, the third pin, the fourth pin and the fifth pin of the voice chip respectively, and the first end, the second end and the third end of the second amplifier correspond to the sixth pin, the seventh pin and the eighth pin of the voice chip respectively.

7. The leakage voice alarm device according to claim 6, characterized in that: The voice chip circuit also includes an eighth capacitor, a ninth capacitor, a tenth capacitor and an eleventh capacitor. The ninth pin of the voice chip is connected to one end of the eighth capacitor, the tenth pin of the voice chip is connected to one end of the ninth capacitor, the eleventh pin of the voice chip is connected to the other end of the ninth capacitor, the twelfth pin of the voice chip is respectively connected to one end of the tenth capacitor and one end of the eleventh capacitor, and the other end of the tenth capacitor is connected to the other end of the eleventh capacitor.

8. The leakage voice alarm device according to claim 2, characterized in that: The device also includes a power supply circuit, which is connected to the voice chip circuit, wherein the power supply circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first inductor, a second inductor and a power conversion chip, wherein the positive electrode of the first diode is respectively connected to one end of the thirteenth capacitor, one end of the fourteenth capacitor, one end of the eleventh resistor, the positive electrode of the second diode, one end of the first inductor, one end of the fifteenth capacitor, one end of the twelfth resistor and the cathode of the third diode, the cathode of the first diode is connected to the live wire, the positive electrode of the fourth diode is connected to the neutral wire, the cathode of the fourth diode is respectively connected to the other end of the thirteenth capacitor, one end of the second inductor and one end of the thirteenth resistor, and the first end of the power conversion chip is respectively connected to The second end of the power conversion chip is connected to the other end of the second inductor, the other end of the fourteenth capacitor, the other end of the eleventh resistor and the other end of the thirteenth resistor. The second end of the power conversion chip is respectively connected to one end of the sixteenth capacitor, one end of the fourteenth resistor and one end of the fifteenth resistor. The other end of the fourteenth resistor is respectively connected to the cathode of the second diode and one end of the seventeenth capacitor. The third end of the power conversion chip is connected to one end of the eighteenth capacitor. The other end of the eighteenth capacitor is respectively connected to the fourth end, the fifth end, the sixth end and the seventh end of the power conversion chip. The fourth end, the fifth end, the sixth end and the seventh end of the power conversion chip are connected in common. The seventh end of the power conversion chip is respectively connected to the other end of the sixteenth capacitor, the other end of the fifteenth resistor, the other end of the seventeenth capacitor, the other end of the first inductor and the cathode of the fifth diode. The other end of the fifth diode is respectively connected to the other end of the fifteenth capacitor, the other end of the twelfth resistor and the anode of the third diode.

9. A chip, characterized in that: It comprises the leakage voice alarm device as described in any one of claims 1 to 8.

10. An electronic device, characterized in that: It comprises the leakage voice alarm device according to any one of claims 1 to 8 or the chip according to claim 9.

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