Waterproof detection and automatic power-off protection circuit and electronic equipment

Abstract

The present disclosure relates to the technical field of electronics, and particularly relates to a waterproof detection and automatic power-off protection circuit and an electronic device. The waterproof detection and automatic power-off protection circuit is applied to an electronic device, and the electronic device further comprises a platform, a power supply and a working module; the circuit comprises: a waterproof detection module, the waterproof detection module is electrically connected with the platform, and the waterproof detection module is used for transmitting detection information output based on a water inflow degree to the platform; a power-off protection module, the power-off protection module is connected in series between the power supply and the working module, the power-off protection module is electrically connected with the platform, and the power-off protection module is used for turning on or turning off the connection between the power supply and the working module based on the detection information and / or control information. The present disclosure can realize waterproof detection, automatic power-off protection and autonomous selection of whether to recover by power-off.

Description

Technical Field

[0001] This disclosure relates to the field of electronic technology, and in particular to a waterproof detection and automatic power-off protection circuit and electronic device. Background Technology

[0002] Existing smart products are used in a variety of complex and varied scenarios. Use in rainy / bathroom settings or accidental drops into water can cause partial or complete water ingress, leading to short circuits, damage to the internal motherboard, and other problems.

[0003] In related technologies, mainstream electronic devices support waterproof detection for USB interfaces. This is achieved by detecting impedance changes in the CC / SBU of the Type-C interface to identify water ingress and short circuits, thereby disconnecting the charging path. However, other areas besides the USB interface rely on structural protection, lacking a detection mechanism after water ingress and failing to provide effective power-off protection. Utility Model Content

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a waterproof detection and automatic power-off protection circuit and electronic device, which can realize waterproof detection, automatic power-off protection, and autonomous selection of whether to restore power after a power outage.

[0005] In a first aspect, this disclosure provides a waterproof detection and automatic power-off protection circuit, applied to an electronic device, which also includes a platform, a power supply, and a working module; the circuit includes: a waterproof detection module electrically connected to the platform, which transmits detection information based on the degree of water ingress to the platform; and a power-off protection module connected in series between the power supply and the working module, which is electrically connected to the platform and is used to connect or disconnect the connection between the power supply and the working module based on the detection information and / or control information.

[0006] Optionally, the power failure protection module includes a first switch module, a first terminal of the first switch module being electrically connected to the power supply, a second terminal of the first switch module being electrically connected to the working module, and a control terminal of the first switch module controlling the state of the first switch module based on detection information and / or control information.

[0007] Optionally, the first switching module includes a first transistor, the source of the first transistor being electrically connected to a power supply, the drain of the first transistor being electrically connected to a working module, and the gate of the first transistor controlling the state of the first transistor based on detection information and / or control information.

[0008] Optionally, the power failure protection module further includes a second switch module, a first resistor, and a second resistor; the first end of the first resistor is electrically connected to the gate of the first transistor, and the second end of the first resistor is grounded; the first end of the second resistor is electrically connected to the battery, and the second end of the second resistor is electrically connected to the first end of the first resistor; the first end of the second switch module is electrically connected to the first end of the first resistor, the second end of the second switch module is grounded, and the control terminal of the second switch module is electrically connected to the ADC interface of the platform, which is used to transmit detection information; the first transistor is a P-type transistor.

[0009] Optionally, the second switching module includes a second transistor, the drain of which is electrically connected to the first terminal of the first resistor, the source of which is grounded, and the gate of which is electrically connected to the ADC interface of the platform; the second transistor is an N-type transistor.

[0010] Optionally, the power failure protection module also includes a third switch module. The first terminal of the third switch module is electrically connected to the first terminal of the first resistor, the second terminal of the third switch module is grounded, and the control terminal of the third switch module is electrically connected to the control interface of the platform. The control interface of the platform is used to transmit control information.

[0011] Optionally, the third switching module includes a third transistor, the drain of which is electrically connected to the first terminal of the first resistor, the source of which is grounded, and the gate of which is electrically connected to the control interface of the platform; the third transistor is an N-type transistor.

[0012] Optionally, the waterproof testing module includes a third resistor and a test module; the first end of the third resistor is electrically connected to the power supply interface of the platform, and the second end of the third resistor is electrically connected to the ADC interface of the platform; the test module includes a first test point and a second test point that are disconnected from each other, the first test point is electrically connected to the first end of the third resistor, and the second test point is grounded.

[0013] Secondly, this disclosure provides an electronic device, including: a platform, a power supply, a working module, and a waterproof detection and automatic power-off protection circuit. The waterproof detection and automatic power-off protection circuit is electrically connected to the platform, the power supply, and the working module, respectively. The waterproof detection and automatic power-off protection circuit is the aforementioned waterproof detection and automatic power-off protection circuit.

[0014] Optionally, the electronic device includes at least two waterproof detection and automatic power-off protection circuits.

[0015] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0016] The waterproof detection and automatic power-off protection circuit disclosed herein includes a waterproof detection module. This module outputs corresponding detection information based on the degree of water ingress and transmits this information to the platform. The platform can then determine whether water has entered and the degree of water ingress based on the detection information, thus enabling waterproof detection. The circuit also includes a power-off protection module, connected in series between the power supply and the working module. The power-off protection module is electrically connected to the platform and is used to connect or disconnect the connection between the power supply and the working module based on the detection information. Specifically, when water enters or reaches a certain level, the power-off protection module can disconnect the connection between the power supply and the working module based on the current detection information, causing the working module to stop working and preventing damage to the motherboard caused by water ingress into the electronic device, thereby achieving automatic power-off protection. The power-off protection module is also used to connect or disconnect the connection between the power supply and the working module based on control information. That is, when the user determines that the water ingress is negligible and needs to forcibly restore the working module's operation, the power-off protection module can forcibly connect the power supply and the working module based on control information, thus allowing the user to choose whether to restore power. The waterproof detection and automatic power-off protection circuit provided in this disclosure can realize waterproof detection, automatic power-off protection, and the ability to choose whether to restore power after a power outage.

[0017] Correspondingly, the electronic device provided in this disclosure also has the above-mentioned technical effects. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an electronic device that includes waterproof detection and automatic power-off protection circuitry.

[0021] Figure 2 This is a circuit diagram of a waterproof detection module provided in this disclosure;

[0022] Figure 3 This is a circuit diagram of a power failure protection module provided in this disclosure. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0025] Figure 1 This is a schematic diagram of the structure of an electronic device that includes waterproof testing and automatic power-off protection circuits. (Refer to...) Figure 1 This disclosure provides a waterproof detection and automatic power-off protection circuit 10, applied to an electronic device. The electronic device also includes a platform 20, a power supply 30, and a working module 40. The circuit 10 includes:

[0026] Waterproof detection module 11 is electrically connected to platform 20. Waterproof detection module 11 is used to transmit detection information based on the degree of water ingress to platform 20.

[0027] The power failure protection module 12 is connected in series between the power supply 30 and the working module 40. The power failure protection module 12 is electrically connected to the platform 20. The power failure protection module 12 is used to turn on or off the connection between the power supply 30 and the working module 40 based on detection information and / or control information.

[0028] Specifically, the waterproof detection and automatic power-off protection circuit provided in this disclosure is applied to electronic devices. The electronic device can be a terminal or a communication terminal, including but not limited to devices configured to receive / transmit communication signals via wired connections, such as via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and / or another data connection / network, and / or via, for example, a wireless interface for a cellular network, wireless local area network (WLAN), digital television networks such as digital video broadcasting handheld (DVB-H) networks, satellite networks, amplitude modulation-frequency modulation (AM-FM) broadcast transmitters, and / or another communication terminal. A communication terminal configured to communicate via a wireless interface can be referred to as a "wireless communication terminal," a "wireless terminal," and / or a "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephone with data processing, fax, and data communication capabilities; personal digital assistants (PDAs) that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. Furthermore, the terminal may also include, but is not limited to, electronic devices such as e-book readers, smart wearable devices, power banks (e.g., portable chargers), electronic cigarettes, wireless mice, wireless keyboards, wireless headphones, and Bluetooth speakers. Of course, it can also be applied to other electronic devices, which will not be elaborated upon here.

[0029] The electronic device also includes a platform 20, and the circuit 10 includes a waterproof detection module 11. The waterproof detection module 11 is electrically connected to the platform 20. The waterproof detection module 11 can output corresponding detection information based on the degree of water ingress and transmit the detection information to the platform 20. Thus, the platform 20 can determine whether water has entered and the degree of water ingress based on the detection information. In other words, the waterproof detection module 11 can realize waterproof detection.

[0030] The electronic device also includes a power supply 30 and a working module 40. The power supply 30 provides power to the working module 40. The circuit 10 also includes a power failure protection module 12, which is connected in series between the power supply 30 and the working module 40. The power failure protection module 12 is electrically connected to the platform 20 and is used to connect or disconnect the connection between the power supply 30 and the working module 40 based on detection information. Specifically, when water enters the device or when water reaches a certain level, the power failure protection module 12 can disconnect the connection between the power supply 30 and the working module 40 based on the detection information at that time, thereby stopping the working module 40 from operating and preventing damage to the motherboard caused by water ingress, thus achieving automatic power failure protection.

[0031] The power failure protection module 12 is also used to connect or disconnect the power supply 30 and the working module 40 based on control information. That is, when the user determines that the water ingress is negligible and it is necessary to forcibly restore the operation of the working module 40, the power failure protection module 12 can forcibly connect the power supply 30 and the working module 40 based on control information, thereby realizing the user's choice of whether to restore power.

[0032] The waterproof detection and automatic power-off protection circuit 10 provided in this embodiment can realize waterproof detection, automatic power-off protection, and autonomous selection of whether to restore power after power failure.

[0033] Figure 2 This is a circuit diagram of a waterproof detection module provided in this disclosure, for reference. Figure 1 and Figure 2 Optionally, the waterproof detection module 11 includes a third resistor R3 and a test module 111;

[0034] The first end of the third resistor R3 is electrically connected to the power supply interface VIO of the platform 20, and the second end of the third resistor R3 is electrically connected to the ADC interface of the platform 20.

[0035] Test module 111 includes a first test point TP1 and a second test point TP2 that are disconnected from each other. The first test point TP1 is electrically connected to the first end of the third resistor R3, and the second test point TP2 is grounded.

[0036] Specifically, the waterproof detection module 11 includes a third resistor R3 and a test module 111. The first end of the third resistor R3 is electrically connected to the power supply interface VIO of the platform 20. The power supply interface VIO of the platform 20 can provide power to the waterproof detection module 11. For example, the power supply interface VIO of the platform 20 can provide 1.8V power to the waterproof detection module 11. Of course, in other embodiments of this disclosure, the power supply interface VIO of the platform 20 can provide other types of power to the waterproof detection module 11, depending on the specific settings of the platform 20, which will not be elaborated further here.

[0037] The second terminal of the third resistor R3 is electrically connected to the ADC interface of the platform 20. The test module 111 includes a first test point TP1 and a second test point TP2 that are disconnected from each other. The first test point TP1 is electrically connected to the first terminal of the third resistor R3, and the second test point TP2 is grounded. The third resistor R3 is a pull-up resistor, which can form a voltage divider with the equivalent resistance between the first test point TP1 and the second test point TP2. For example, the resistance value of the third resistor R3 can be 100KΩ. Of course, the resistance value of the third resistor R3 can also be other values, which can be set according to actual needs, and will not be elaborated here. The first test point TP1 and the second test point TP2 can be set at the location in the electronic device where water ingress detection is required, for example, at the headphone jack, SIM card slot, and camera lens.

[0038] Under normal operating conditions, the resistance between the first test point TP1 and the second test point TP2 is infinite. At this time, the voltage value of the detection information transmitted by the waterproof detection module 11 to the ADC interface of the platform 20 is the same as the voltage value of the power supply provided by the power supply interface VIO of the platform 20.

[0039] During water ingress, an impedance R is generated between the first test point TP1 and the second test point TP2 due to water stains. TP At this time, the voltage V of the detected information ADC for:

[0040] V IO The voltage value of the power supply provided to the power supply interface VIO of platform 20, and R3 is the resistance value of the third resistor R3.

[0041] According to the formula, as the influent volume increases, R... TP The resistance value keeps decreasing, V ADC The voltage also gradually decreases, and the platform 20 can determine whether water has entered and the degree of water ingress based on the voltage value of the detection information. That is, the waterproof detection module 11 can realize waterproof detection.

[0042] Figure 3 This is a circuit diagram of a power failure protection module provided in this disclosure, for reference. Figure 1 and Figure 3 In some optional embodiments, the power failure protection module 12 includes a first switch module 121, the first end of the first switch module 121 is electrically connected to the power supply 30, the second end of the first switch module 121 is electrically connected to the working module 40, and the control terminal of the first switch module 121 controls the state of the first switch module 121 based on detection information and / or control information.

[0043] Specifically, the power failure protection module 12 includes a first switch module 121. The first end of the first switch module 121 is electrically connected to the power supply 30, and the second end of the first switch module 121 is electrically connected to the working module 40. The control terminal of the first switch module 121 controls the state of the first switch module 121 based on the detection information. When water enters or the water enters to a certain level, the control terminal of the first switch module 121 can control the first switch module 121 to be in the closed state based on the detection information at this time, thereby disconnecting the connection between the power supply 30 and the working module 40, so that the working module 40 stops working, avoiding problems such as motherboard damage caused by water entering the electronic equipment, thereby realizing automatic power failure protection.

[0044] The control terminal of the first switch module 121 can also control the state of the first switch module 121 based on control information. That is, when the user determines that the water ingress situation is negligible and it is necessary to force the working module 40 to resume operation, the control terminal of the first switch module 121 can be controlled to be in the conducting state based on control information, thereby forcibly connecting the power supply 30 and the working module 40, thus realizing the ability to choose whether to restore power after a power outage.

[0045] Continue to refer to Figure 1 and Figure 3 In some optional embodiments, the first switching module 121 includes a first transistor Q1, the source of the first transistor Q1 is electrically connected to the power supply 30, the drain of the first transistor Q1 is electrically connected to the working module 40, and the gate of the first transistor Q1 controls the state of the first transistor Q1 based on detection information and / or control information.

[0046] Specifically, the first switch module 121 includes a first transistor Q1. The source of the first transistor Q1 is electrically connected to the power supply 30, and the drain of the first transistor Q1 is electrically connected to the working module 40. The gate of the first transistor Q1 controls the state of the first transistor Q1 based on detection information. When water enters or the water level reaches a certain point, the gate of the first transistor Q1 can control the first transistor Q1 to be in a closed state based on the detection information at this time, thereby disconnecting the connection between the power supply 30 and the working module 40, so that the working module 40 stops working, avoiding problems such as motherboard damage caused by water entering the electronic device, thereby realizing automatic power-off protection.

[0047] The gate of the first transistor Q1 can also control the state of the first transistor Q1 based on control information. That is, when the user determines that the water ingress situation is negligible and it is necessary to force the working module 40 to resume operation, the gate of the first transistor Q1 can be controlled to be turned on based on control information, thereby forcibly turning on the connection between the power supply 30 and the working module 40, thereby realizing the ability to choose whether to restore power after a power outage.

[0048] Continue to refer toFigure 1 and Figure 3 In some optional embodiments, the power failure protection module 12 further includes a second switch module 122, a first resistor R1, and a second resistor R2;

[0049] The first end of the first resistor R1 is electrically connected to the gate of the first transistor Q1, and the second end of the first resistor R1 is grounded.

[0050] The first end of the second resistor R2 is electrically connected to the battery 50, and the second end of the second resistor R2 is electrically connected to the first end of the first resistor R1.

[0051] The first terminal of the second switch module 122 is electrically connected to the first terminal of the first resistor R1, the second terminal of the second switch module 122 is grounded, and the control terminal of the second switch module 122 is electrically connected to the ADC interface of the platform 20. The ADC interface of the platform is used to transmit detection information.

[0052] The first transistor, Q1, is a P-type transistor.

[0053] Specifically, in normal operation, the detection information controls the second switch module 122 to be in the on state. At this time, the gate of the first transistor Q1 is directly grounded. The first transistor Q1 is a P-type transistor. At this time, the first transistor Q1 is in the on state, thereby connecting the power supply 30 and the working module 40. The power supply 30 provides power to the working module 40, and the working module 40 works normally.

[0054] When the automatic power-off protection is in operation, if water enters the device or the water level reaches a certain point, the detection information controls the second switch module 122 to be in the off state. At this time, the gate voltage of the first transistor Q1 is at a high level. The first transistor Q1 is a P-type transistor, and at this time, the first transistor Q1 is in the off state, thereby disconnecting the connection between the power supply 30 and the working module 40. The power supply 30 stops supplying power to the working module 40, and the working module 40 stops working, thus avoiding problems such as damage to the motherboard caused by water entering the electronic device, thereby realizing automatic power-off protection.

[0055] Continue to refer to Figure 1 and Figure 3 In some optional embodiments, the second switch module 122 includes a second transistor Q2, the drain of the second transistor Q2 is electrically connected to the first terminal of the first resistor R1, the source of the second transistor Q2 is grounded, and the gate of the second transistor Q2 is electrically connected to the ADC interface of the platform 20.

[0056] The second transistor is an N-type transistor.

[0057] Specifically, the second switch module 122 includes a second transistor Q2, which is an N-type transistor. The drain of the second transistor Q2 is electrically connected to the first terminal of the first resistor R1, the source of the second transistor Q2 is grounded, and the gate of the second transistor Q2 is electrically connected to the ADC interface of the platform 20. During normal operation, the voltage of the detected information is high, controlling the second transistor Q2 to be in the conducting state. At this time, the gate of the first transistor Q1 is directly grounded. The first transistor Q1 is a P-type transistor, and it is in the conducting state, thereby connecting the power supply 30 and the working module 40. The power supply 30 provides power to the working module 40, and the working module 40 operates normally.

[0058] In the automatic power-off protection mode, after water enters, the voltage of the detection information gradually decreases. When the water level reaches a certain point, the voltage of the detection information becomes less than the conduction voltage of the second transistor Q2. At this time, the detection information controls the second transistor Q2 to be in the off state. At this time, the gate voltage of the first transistor Q1 is at a high level. The first transistor Q1 is a P-type transistor, and it is in the off state. This disconnects the connection between the power supply 30 and the working module 40. The power supply 30 stops supplying power to the working module 40, and the working module 40 stops working, avoiding problems such as motherboard damage caused by water entering the electronic equipment, thus realizing automatic power-off protection.

[0059] For example, the turn-on voltage of the second transistor Q2 can be 0.6V. Of course, in other embodiments of this disclosure, the turn-on voltage of the second transistor Q2 can be other values, depending on the type of the second transistor Q2 selected. This disclosure does not make any specific limitation in this regard.

[0060] Optionally, during autonomous power outage recovery, after the water stains between the first test point TP1 and the second test point TP2 gradually dry and disappear, R... TP As the resistance increases, V ADC As the voltage of the detection information gradually increases, when it exceeds the conduction voltage of the second transistor Q2, the detection information controls the second transistor Q2 to return to the conducting state. At this time, the gate voltage of the first transistor Q1 is 0V. The first transistor Q1 is a P-type transistor and is in the conducting state, thereby connecting the power supply 30 and the working module 40. The power supply 30 resumes supplying power to the working module 40, and the working module 40 resumes operation, thus achieving autonomous power failure recovery.

[0061] Continue to refer to Figure 1 and Figure 3In some optional embodiments, the power failure protection module 12 further includes a third switch module 123. The first end of the third switch module 123 is electrically connected to the first end of the first resistor R1, the second end of the third switch module 123 is grounded, and the control end of the third switch module 123 is electrically connected to the control interface GPIO of the platform 20. The control interface GPIO of the platform 20 is used to transmit control information.

[0062] Specifically, in normal working state and automatic power-off protection working state, the control information controls the third switch module 123 to be in the closed state. At this time, the third switch module 123 does not affect normal working and automatic power-off protection.

[0063] When the user determines that power should be cut off due to water ingress, the control information controls the third switch module 123 to the off state. The gate voltage of the first transistor Q1 remains at a high level, and the first transistor Q1 is in the off state, thereby cutting off the connection between the power supply 30 and the working module 40. The power supply 30 stops supplying power to the working module 40, and the working module 40 stops working. When the user determines that the water ingress is negligible, the control information controls the third switch module 123 to the on state. At this time, the gate of the first transistor Q1 is grounded. The first transistor Q1 is a P-type transistor, and it is in the on state, thereby connecting the power supply 30 and the working module 40. The power supply 30 resumes supplying power to the working module 40, and the working module 40 resumes operation, thus achieving forced power-off recovery. This allows for the user to choose whether to perform a power-off recovery, improving the user experience.

[0064] Continue to refer to Figure 1 and Figure 3 The third switch module 123 includes a third transistor Q3. The drain of the third transistor Q3 is electrically connected to the first terminal of the first resistor R1, the source of the third transistor Q3 is grounded, and the gate of the third transistor Q3 is electrically connected to the control interface GPIO of the platform 20.

[0065] The third transistor, Q3, is an N-type transistor.

[0066] Specifically, in normal operation and automatic power-off protection operation, the control information controls the third transistor Q3 to be in the off state. At this time, the third transistor Q3 does not affect normal operation and automatic power-off protection operation.

[0067] When the user determines that power failure is necessary due to water ingress, the control information turns off the third transistor Q3, while the gate voltage of the first transistor Q1 remains high, effectively turning Q1 off. This disconnects the power supply 30 from the working module 40, stopping power supply 30 and causing the module to stop operating. Conversely, when the user determines that water ingress is negligible, the control information turns on the third transistor Q3. The gate of the first transistor Q1 is grounded, and Q1, being a P-type transistor, becomes on, reconnecting the power supply 30 to the working module 40. Power supply 30 resumes power supply to the module, and the module resumes operation, thus achieving forced power failure recovery. This allows for user-selective power failure recovery, improving the user experience.

[0068] This disclosure provides an electronic device, including: a platform, a power supply, a working module, and a waterproof detection and automatic power-off protection circuit. The waterproof detection and automatic power-off protection circuit is electrically connected to the platform, the power supply, and the working module, respectively. The waterproof detection and automatic power-off protection circuit is the aforementioned waterproof detection and automatic power-off protection circuit. For a detailed structural diagram of the waterproof detection and automatic power-off protection circuit, please refer to... Figures 1 to 3 The description of the specific components of the waterproof detection and automatic power-off protection circuit in the illustrated embodiment also has corresponding beneficial effects, which will not be repeated here to avoid repetition.

[0069] In some alternative embodiments, the electronic device includes at least two waterproof detection and automatic power-off protection circuits, and different waterproof detection and automatic power-off protection circuits perform waterproof detection and automatic power-off protection for different locations in the electronic device.

[0070] Optionally, the platform can be configured with multiple ADC interfaces, and different waterproof detection and automatic power-off protection circuits can be electrically connected to different ADC interfaces. This allows for waterproof detection and automatic power-off protection at different locations in electronic devices, and can also determine the location of water ingress, providing targeted alerts to users on which interface in their electronic devices is at risk of water ingress.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A waterproof detection and automatic power-off protection circuit, applied to electronic equipment, characterized in that, The electronic device further includes a platform, a power supply, and a working module; the circuit includes: A waterproof detection module is electrically connected to the platform and is used to transmit detection information based on the degree of water ingress to the platform. A power failure protection module is connected in series between the power supply and the working module. The power failure protection module is electrically connected to the platform. The power failure protection module is used to connect or disconnect the connection between the power supply and the working module based on the detection information and / or control information.

2. The circuit according to claim 1, characterized in that, The power failure protection module includes a first switch module, a first terminal of the first switch module is electrically connected to the power supply, a second terminal of the first switch module is electrically connected to the working module, and the control terminal of the first switch module controls the state of the first switch module based on the detection information and / or the control information.

3. The circuit according to claim 2, characterized in that, The first switching module includes a first transistor, the source of the first transistor is electrically connected to the power supply, the drain of the first transistor is electrically connected to the working module, and the gate of the first transistor controls the state of the first transistor based on the detection information and / or the control information.

4. The circuit according to claim 3, characterized in that, The power failure protection module also includes a second switch module, a first resistor, and a second resistor; The first end of the first resistor is electrically connected to the gate of the first transistor, and the second end of the first resistor is grounded. The first end of the second resistor is electrically connected to the battery, and the second end of the second resistor is electrically connected to the first end of the first resistor; The first terminal of the second switch module is electrically connected to the first terminal of the first resistor, the second terminal of the second switch module is grounded, and the control terminal of the second switch module is electrically connected to the ADC interface of the platform. The ADC interface of the platform is used to transmit the detection information. The first transistor is a P-type transistor.

5. The circuit according to claim 4, characterized in that, The second switching module includes a second transistor, the drain of the second transistor is electrically connected to the first terminal of the first resistor, the source of the second transistor is grounded, and the gate of the second transistor is electrically connected to the ADC interface of the platform. The second transistor is an N-type transistor.

6. The circuit according to claim 4, characterized in that, The power failure protection module also includes a third switch module. The first terminal of the third switch module is electrically connected to the first terminal of the first resistor, the second terminal of the third switch module is grounded, and the control terminal of the third switch module is electrically connected to the control interface of the platform. The control interface of the platform is used to transmit the control information.

7. The circuit according to claim 6, characterized in that, The third switching module includes a third transistor, the drain of which is electrically connected to the first terminal of the first resistor, the source of which is grounded, and the gate of which is electrically connected to the control interface of the platform. The third transistor is an N-type transistor.

8. The circuit according to claim 1, characterized in that, The waterproof testing module includes a third resistor and a testing module; The first end of the third resistor is electrically connected to the power supply interface of the platform, and the second end of the third resistor is electrically connected to the ADC interface of the platform. The test module includes a first test point and a second test point that are disconnected from each other. The first test point is electrically connected to the first end of the third resistor, and the second test point is grounded.

9. An electronic device, characterized in that, include: The platform, power supply, working module, and waterproof detection and automatic power-off protection circuit are provided. The waterproof detection and automatic power-off protection circuit is electrically connected to the platform, the power supply, and the working module, respectively. The waterproof detection and automatic power-off protection circuit is the waterproof detection and automatic power-off protection circuit as described in any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that, The electronic device includes at least two of the aforementioned waterproof detection and automatic power-off protection circuits.

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