CN216309855U - Humid environment detection circuit and electronic equipment - Google Patents
Humid environment detection circuit and electronic equipment Download PDFInfo
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- CN216309855U CN216309855U CN202120056060.0U CN202120056060U CN216309855U CN 216309855 U CN216309855 U CN 216309855U CN 202120056060 U CN202120056060 U CN 202120056060U CN 216309855 U CN216309855 U CN 216309855U
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Abstract
The utility model provides a humid environment detection circuit and electronic equipment, and relates to the technical field of intelligent terminals. The wet environment detection circuit and the electronic equipment are characterized in that a sideband signal end of the data interface is connected with an analog-to-digital conversion port of the power management chip through the voltage division module, the analog-to-digital conversion port can acquire a voltage value output by the voltage division module, so that the impedance to ground of the sideband signal end can be determined according to the change condition of the voltage value, when the voltage of the voltage division module is reduced and is smaller than a preset voltage, the impedance to ground of the sideband signal end is reduced, the universal data interface can be determined to be in a wet environment, and the detection of the wet environment can be achieved.
Description
Technical Field
The utility model relates to the technical field of intelligent terminals, in particular to a humid environment detection circuit and electronic equipment.
Background
With the widespread use of smart terminals such as mobile phones and tablet computers, the application scenarios of the smart terminals are more and more extensive, and for mobile phones, the mobile phones are used in different environments, and in different application environments, various abnormal conditions may occur to the mobile phones, for example, in an area with much rainwater, the mobile phones may be in a humid environment frequently, if the mobile phones are humid or a charging port is filled with water, when the charging port of the mobile phones is connected with a charger for charging, a short circuit may occur, and devices may be damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a wet environment detection circuit and electronic equipment, which can automatically identify whether a data interface is in a wet environment and avoid faults of short circuit and the like of the electronic equipment in the wet environment.
The utility model can be realized by adopting the following technical scheme:
in a first aspect, the present invention provides a wet environment detection circuit, which is applied to an intelligent terminal, and includes:
the device comprises a general data interface, a two-way switch control chip, a power management chip, a voltage division module and a processor;
the universal data interface comprises a sideband signal end; the two-way switch control chip comprises a signal common input end and a first output channel;
the signal common input end is connected with the sideband signal end, the first output channel is connected with an analog-to-digital conversion port of the power management chip, and the voltage division module is connected with the analog-to-digital conversion port;
the power management chip is connected with the processor;
when the signal common input end of the two-way switch control chip is communicated with the first output channel, the analog-to-digital conversion port acquires a voltage value of an electric signal output by the voltage division module and sends the voltage value to the processor;
and the processor is used for determining that the universal data interface is in a humid environment when the voltage value is lower than a preset voltage.
In an optional embodiment, the two-way switch control chip includes a second output channel, and the processor includes a data transceiving port;
the second output channel is connected with the data transceiving port;
and when the signal common input end of the two-way switch control chip is communicated with the second output channel, the processor is used for outputting a system log to external equipment connected with the universal data interface.
In an optional embodiment, the two-way switch control chip comprises a control end SE, and the control end SE is connected with a general I/O port of the processor;
the two-way switch control chip is used for changing the working state according to the signal output by the general I/O port, and when the general I/O port outputs a first level signal, the two-way switch control chip communicates the signal common input end with the first output channel;
when the general I/O port outputs a second level signal, the two-way switch control chip communicates the signal common input end with the second output channel;
wherein the first level signal and the second level signal have opposite level states.
In an optional embodiment, the voltage dividing module includes a dc power supply, a first resistor, and a second resistor;
the direct current power supply is grounded after passing through the first resistor and the second resistor in sequence, a voltage division point is formed at a connection point of the first resistor and the second resistor, and the voltage division point is connected with an analog-to-digital conversion port of the power management chip.
In an alternative embodiment, when the voltage value is lower than (R2 × VCC)/(R1+ R2), the processor determines that the universal data interface is in a humid environment, where VCC is the voltage of the dc power supply, R1 is the resistance value of the first resistor, and R2 is the resistance value of the second resistor.
In an optional embodiment, the two-way switch control chip comprises an enable terminal, and the enable terminal is active at a low level;
the enabling end is grounded, so that the two-way switch control chip is continuously in a working state.
In an alternative embodiment, the sideband signal terminals include a first sideband signal terminal SBU1, a second sideband signal terminal SBU 2;
the signal common input end of the two-way switch control chip comprises a first signal end DP and a second signal end DM;
the first side band signal terminal SBU1 is connected to the first signal terminal DP; the second sideband signal terminal SBU2 is connected to the second signal terminal DM.
In an alternative embodiment, the first output channel includes a third signal terminal DP1 and a fourth signal terminal DM1, and both the third signal terminal DP1 and the fourth signal terminal DM1 are connected to the analog-to-digital conversion port.
In an alternative embodiment, the second output channel includes a fifth signal terminal DP2, a sixth signal terminal DM 2;
the data transceiving port of the processor comprises a data receiving port UART _ RX and a data transmitting port UART _ TX;
the fifth signal terminal DP2 is connected to the data transmitting port UART _ TX, and the sixth signal terminal DM2 is connected to the data receiving port UART _ RX.
In a second aspect, the present invention provides an electronic device comprising a humid environment detection circuit according to any one of the preceding embodiments.
Compared with the prior art, the humid environment detection circuit and the electronic equipment provided by the utility model have the beneficial effects that: the utility model provides a humid environment detection circuitry and electronic equipment, through the analog-to-digital conversion port with data interface's side band signal end through voltage division module and power management chip, this analog-to-digital conversion port can acquire the voltage value of voltage division module output to can confirm the impedance to ground of side band signal end according to the voltage value change situation, when voltage division module's voltage reduces, when this voltage value is less than preset voltage, show that the impedance to ground of side band signal end diminishes, can confirm general data interface is in humid environment, thereby can realize humid environment's detection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a functional block diagram of a wet environment detection circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit structure diagram of a wet environment detection circuit according to an embodiment of the present application.
Icon: 100-a wet environment detection circuit; 110-a generic data interface; 120-two-way switch control chip; 130-power management chip; 140-a processor; 150-partial pressure module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention conventionally put into use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With the widespread use of smart terminals such as mobile phones and tablet computers, the application scenarios of the smart terminals are more and more extensive, and for mobile phones, the functions of the mobile phones are more and more, and the mobile phones can be used in different environments, but in different application environments, various abnormal conditions may occur to the mobile phones, for example, in areas with much rainwater, the mobile phones may be often in a humid environment, if the mobile phones are humid or a charging port of the mobile phones is filled with water, when the charging port of the mobile phones is connected with a charger for charging, a short circuit may occur, so that devices may be damaged, or even the complete mobile phone may malfunction.
In order to avoid a fault of a smart terminal such as a mobile phone in a humid environment, the environment is detected first. The embodiment provides a wet environment detection circuit, which can be applied to electronic equipment such as a mobile phone and a tablet personal computer and can realize automatic detection of a wet environment.
Referring to fig. 1, fig. 1 shows a schematic diagram of a wet environment detection circuit 100 provided in the present embodiment, where the wet environment detection circuit 100 provided in the present embodiment includes: general data interface 110, two-way switch control chip 120, power management chip 130, voltage division module 150 and processor 140.
Wherein, the universal data interface 110 includes a sideband signal terminal, the two-way switch control chip 120 includes a signal common input terminal and a first output channel, the signal common input terminal is connected with the sideband signal terminal of the universal data interface 110, the first output channel is connected with the analog-to-digital conversion port of the power management chip 130, the voltage dividing module 150 is also connected with the analog-to-digital conversion port, so that the analog-to-digital conversion port can detect the voltage on the voltage dividing module 150, when the signal common input terminal of the two-way switch control chip 120 is connected with the first output channel, since the sideband signal terminal is also connected with the analog-to-digital conversion port through the two-way switch control chip 120, the ground resistance of the sideband signal terminal will have an influence on the voltage dividing module 150, if the universal data interface 110 is in a humid environment, the ground resistance of the sideband signal terminal is reduced, the current flowing through the sideband signal terminal will be increased, resulting in a decrease in current and a decrease in voltage to the voltage divider module 150. Therefore, if the divided voltage of the voltage dividing module 150 is decreased, when the voltage is decreased to be lower than the predetermined voltage, it can be determined that the sideband signal terminal is in the wet environment, i.e. the universal data interface 110 is in the wet environment.
In one possible implementation, the power management chip 130 is coupled to the processor 140. When the signal common input end of the two-way switch control chip 120 is communicated with the first output channel, that is, the sideband signal end is connected with the analog-to-digital conversion port of the power management chip 130, the power management chip 130 sends the voltage value of the voltage division module 150 detected by the analog-to-digital conversion port to the processor 140, the processor 140 performs judgment according to the voltage value, and when the voltage value is lower than a preset voltage, it is determined that the universal data interface 110 is in a humid environment.
In the wet environment detection circuit 100 provided in this embodiment, when the dual-way switch control chip 120 communicates the signal common input end with the first output channel, that is, the sideband signal end is connected with the analog-to-digital conversion port of the power management chip 130, the power management chip 130 detects the divided voltage output by the voltage dividing module 150 and transmits the voltage value to the processor 140, and when the voltage value is lower than the preset voltage, the processor 140 determines that the universal data interface 110 is in a wet environment, that is, determines that the electronic device is in a wet environment, thereby implementing automatic detection of the wet environment.
In an alternative embodiment, the two-way switch control chip 120 includes a second output channel, and the processor 140 includes a data transceiving port; the second output channel is connected with the data receiving and transmitting port; when the signal common input terminal of the two-way switch control chip 120 is communicated with the second output channel, that is, the sideband signal terminal of the universal data interface 110 is connected with the data transceiving port of the processor 140, and the processor 140 is configured to output the system log to the external device connected to the universal data interface 110. Once the electronic device such as a mobile phone has a fault, the universal data interface 110 can be used to obtain a system log, a fault log, and the like of the electronic device, so as to analyze the fault of the electronic device.
The system log may be stored in an internal storage space of the processor 140, or may be stored in a separate memory.
Referring to fig. 2, in an alternative embodiment, the two-way switch control chip 120 includes an enable terminal OE and a control terminal SE, the enable terminal OE is active low, and the enable terminal OE is grounded, so that the two-way switch control chip 120 is continuously in an operating state. The processor 140 includes a general purpose I/O port (labeled GPIO in the figure), and the control terminal SE is connected to the general purpose I/O port of the processor 140. The two-way switch control chip 120 is configured to change a working state according to a signal output by the general I/O port, and when the general I/O port outputs a first level signal, the two-way switch control chip 120 connects the signal common input terminal with the first output channel; when the general I/O port outputs the second level signal, the two-way switch control chip 120 communicates the signal common input terminal with the second output channel; wherein the first level signal and the second level signal have opposite level states. Therefore, the processor 140 can be used to output different IO signals to control the operating state of the two-way switch control chip 120, thereby implementing different functions of the electronic device, such as humid environment detection or log output.
In an alternative embodiment, please continue to refer to fig. 2, the voltage divider module 150 includes a dc power VCC, a first resistor R1, and a second resistor R2; the dc power VCC is grounded after passing through the first resistor R1 and the second resistor R2 in sequence, a voltage division point is formed at a connection point of the first resistor R1 and the second resistor R2, and the voltage division point is connected to the analog-to-digital conversion port ADC of the power management chip 130. When the two-way switch control chip 120 connects the signal common input terminal with the first output channel, the sideband signal terminal of the universal data interface 110 is connected with the analog-to-digital conversion port ADC and is also connected with the voltage division point, the sideband signal terminal is equivalent to the parallel circuit of the second resistor R2, when the sideband signal terminal is in a humid environment, when the ground resistance of the sideband signal terminal is reduced, the current thereon is increased, which results in the parallel resistance of the second resistor R2 and the sideband signal terminal being reduced and the divided voltage being reduced, therefore, whether the sideband signal terminal is in a humid environment can be determined according to the voltage output by the voltage division point.
In an alternative embodiment, the preset voltage may be determined according to the voltage values of the first resistor R1, the second resistor R2, and the dc power VCC, and when the voltage value is lower than (R2 × VCC)/(R1+ R2), the processor 140 determines that the universal data interface 110 is in a wet environment, where VCC is the voltage of the dc power VCC, R1 is the resistance value of the first resistor, and R2 is the resistance value of the second resistor.
Referring to fig. 2, a possible implementation manner of the present application is described below, in some possible implementation manners, the Universal data interface 110 may be a Universal Serial Bus (USB) interface, such as a USB Type-C interface, where the Type-C interface has two sideband signal terminals that can be used for functional multiplexing, and the embodiment uses the sideband signal terminals for detecting a humid environment and outputting a system log. For example, the sideband signal terminals include a first sideband signal terminal SBU1 and a second sideband signal terminal SBU 2. The Type-C interface further comprises ports such as Vbus, CC1, CC2, DP, DM and GND, the Vbus, the CC1, the CC2, the DP and the DM of the Type-C interface are connected with the power management chip 130, the functions of charging and the like of the electronic equipment are achieved, in order to avoid the situations of overcurrent and the like during charging, a protection resistor can be arranged between the DP port and the DM port of the Type-C interface and the power management chip 130, and when overcurrent occurs, the power management chip 130 is protected.
The signal common input end of the two-way switch control chip 120 includes a first signal end DP and a second signal end DM; the first side band signal terminal SBU1 is connected to the first signal terminal DP; the second sideband signal terminal SBU2 is connected to the second signal terminal DM.
The dual-way switch control chip 120 includes a signal common input terminal, an enable terminal OE and a control terminal SE, a first output channel and a second output channel, wherein the signal common input terminal of the dual-way switch control chip 120 includes a first signal terminal DP and a second signal terminal DM; the first side band signal terminal SBU1 is connected to the first signal terminal DP; the second sideband signal terminal SBU2 is connected to the second signal terminal DM.
The first output channel includes a third signal terminal DP1 and a fourth signal terminal DM1, and both the third signal terminal DP1 and the fourth signal terminal DM1 are connected to the analog-to-digital conversion port of the power management chip 130.
In an alternative embodiment, the second output channel includes a fifth signal terminal DP2 and a sixth signal terminal DM2, and the data transceiving ports of the processor 140 include a data receiving port UART _ RX and a data transmitting port UART _ TX; the fifth signal terminal DP2 is connected to the data transmitting port UART _ TX, and the sixth signal terminal DM2 is connected to the data receiving port UART _ RX.
The two-way switch control chip 120 includes an enable terminal OE and a control terminal SE, the enable terminal OE is active low, and the enable terminal OE is grounded, so that the two-way switch control chip 120 is continuously in an operating state.
The control end SE is connected to the general I/O port of the processor 140, the two-way switch control chip 120 is configured to change a working state according to a signal output by the general I/O port, when the general I/O port outputs a first level signal, the two-way switch control chip 120 connects the signal common input end to the first output channel, the first sideband signal end SBU1 and the second sideband signal end SBU2 are connected to the analog-to-digital conversion port ADC of the power management chip 130, the analog-to-digital conversion port ADC detects a voltage output by the voltage division module 150, the power management chip 130 sends a detected voltage value to the processor 140, and when the voltage value is lower than a preset voltage, the processor 140 determines that the general data interface 110 is in a wet environment, thereby detecting the wet environment through the general data interface 110.
When the general-purpose I/O port outputs a second level signal with a level state opposite to that of the first level signal, the two-way switch control chip 120 connects the signal common input terminal with the second output channel, the first sideband signal terminal SBU1 is connected with the data transmission port UART _ TX of the processor 140, the second sideband signal terminal SBU2 is connected with the data reception port UART _ RX of the processor 140, and when the Type-C connector is plugged into the Type-C interface, the processor 140 outputs the system log outwards through the interface, for example, the fault log can be output outwards, so that the output of the system log is realized through the general-purpose data interface 110.
It will be appreciated that in some possible implementations, the general purpose I/O port of the processor 140 outputs a first level signal by default to maintain the electronic device in a wet environment detection state, and when the processor 140 determines that the general purpose data interface 110 is in a wet environment, a prompt may be output to the user, for example, a prompt may be displayed on a display screen of the electronic device.
The processor 140 may be an integrated circuit chip having signal processing capabilities. The processor 140 may be a general-purpose processor including a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, and discrete hardware components.
The present invention also provides an electronic device comprising a wet environment detection circuit 100 as in any of the previous embodiments. It should be noted that the technical effect and the technical principle of the electronic device provided in the present embodiment are substantially the same as those of the wet environment detection circuit 100 provided in the above embodiment, and the present embodiment is not described in detail, and please refer to relevant contents in the foregoing embodiment without describing details.
To sum up, the application provides a humid environment detection circuitry and electronic equipment, the analog-to-digital conversion port that utilizes the double-circuit switch control chip to pass through voltage division module and power management chip through the side band signal end with data interface is connected, this analog-to-digital conversion port can acquire the voltage value of voltage division module output, thereby can confirm the impedance to earth of side band signal end according to the change situation of voltage value, when voltage division module's voltage reduces, when this voltage value is less than preset voltage, show that the impedance to earth of side band signal end diminishes, can confirm that general data interface is in humid environment, thereby can realize humid environment's detection. Meanwhile, the sideband signal end is also connected with a data receiving and transmitting port of the processor through the two-way switch control chip, the processor can output system logs through the universal data transmission interface, and the universal data interface can be used for realizing moisture detection and system log output.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A humid environment detection circuit, characterized in that, humid environment detection circuit is applied to intelligent terminal, the circuit includes:
the device comprises a general data interface, a two-way switch control chip, a power management chip, a voltage division module and a processor;
the universal data interface comprises a sideband signal end; the two-way switch control chip comprises a signal common input end and a first output channel;
the signal common input end is connected with the sideband signal end, the first output channel is connected with an analog-to-digital conversion port of the power management chip, and the voltage division module is connected with the analog-to-digital conversion port;
the power management chip is connected with the processor;
when the signal common input end of the two-way switch control chip is communicated with the first output channel, the analog-to-digital conversion port acquires a voltage value of an electric signal output by the voltage division module and sends the voltage value to the processor;
and the processor is used for determining that the universal data interface is in a humid environment when the voltage value is lower than a preset voltage.
2. The wet environment detection circuit of claim 1, wherein said two-way switch control chip includes a second output channel, said processor includes a data transceiver port;
the second output channel is connected with the data transceiving port;
and when the signal common input end of the two-way switch control chip is communicated with the second output channel, the processor is used for outputting a system log to external equipment connected with the universal data interface.
3. The wet environment detection circuit according to claim 2, wherein said two-way switch control chip comprises a control terminal SE, said control terminal SE being connected to a general purpose I/O port of said processor;
the two-way switch control chip is used for changing the working state according to the signal output by the general I/O port, and when the general I/O port outputs a first level signal, the two-way switch control chip communicates the signal common input end with the first output channel;
when the general I/O port outputs a second level signal, the two-way switch control chip communicates the signal common input end with the second output channel;
wherein the first level signal and the second level signal have opposite level states.
4. The wet environment detection circuit of claim 1, wherein said voltage divider module comprises a dc power source, a first resistor and a second resistor;
the direct current power supply is grounded after passing through the first resistor and the second resistor in sequence, a voltage division point is formed at a connection point of the first resistor and the second resistor, and the voltage division point is connected with an analog-to-digital conversion port of the power management chip.
5. The moist environment detecting circuit of claim 4, wherein the processor determines that the universal data interface is in a moist environment when the voltage value is lower than (R2 xVCC)/(R1 + R2), wherein VCC is the voltage of the DC power supply, R1 is the resistance of the first resistor, and R2 is the resistance of the second resistor.
6. The wet environment detection circuit of claim 1, wherein said two-way switch control chip includes an enable terminal, said enable terminal being active low;
the enabling end is grounded, so that the two-way switch control chip is continuously in a working state.
7. The humid environment detection circuit of claim 2, wherein said side band signal terminals comprise a first side band signal terminal SBU1, a second side band signal terminal SBU 2;
the signal common input end of the two-way switch control chip comprises a first signal end DP and a second signal end DM;
the first side band signal terminal SBU1 is connected to the first signal terminal DP; the second sideband signal terminal SBU2 is connected to the second signal terminal DM.
8. The wet environment detection circuit of claim 7, wherein the first output channel comprises a third signal terminal DP1, a fourth signal terminal DM1, the third signal terminal DP1 and the fourth signal terminal DM1 are both connected to the analog-to-digital conversion port.
9. The humid environment detection circuit of claim 7, wherein said second output channel comprises a fifth signal terminal DP2, a sixth signal terminal DM 2;
the data transceiving port of the processor comprises a data receiving port UART _ RX and a data transmitting port UART _ TX;
the fifth signal terminal DP2 is connected to the data transmitting port UART _ TX, and the sixth signal terminal DM2 is connected to the data receiving port UART _ RX.
10. An electronic device, characterized in that it comprises a wet environment detection circuit according to any one of claims 1 to 9.
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| CN202120056060.0U CN216309855U (en) | 2021-01-08 | 2021-01-08 | Humid environment detection circuit and electronic equipment |
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| CN202120056060.0U CN216309855U (en) | 2021-01-08 | 2021-01-08 | Humid environment detection circuit and electronic equipment |
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