CN113946884A

CN113946884A - Computer power supply for detecting case opening and case opening control method

Info

Publication number: CN113946884A
Application number: CN202111228604.8A
Authority: CN
Inventors: 唐世伟
Original assignee: Shenzhen Weidianyuan Technology Co ltd
Current assignee: Shenzhen Weidianyuan Technology Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-01-18

Abstract

The invention discloses a computer power supply for detecting the opening of a case and a case opening control method. Wherein, computer power is located quick-witted case and opens panel one side to be connected with the computer mainboard, it includes: the device comprises a filtering and protecting module, a power supply conversion module, an opening detection module, an alarm module, a connector connected with a computer mainboard, an instruction input module and a control module; when the case opening detection module detects that the case opening panel is opened, the case opening detection module feeds back the case opening panel to the control module, and the control module enables the alarm module to output alarm information and sends starting-up warning information through each computer mainboard of the connector; when the instruction input module receives the alarm elimination instruction, the control module enables the alarm module to stop alarming. The invention adds the function of detecting the case opening without changing the mainboard of the computer, and can give an alarm in time when the case is detected to be opened, even can close the computer.

Description

Computer power supply for detecting case opening and case opening control method

Technical Field

The invention relates to the technical field of computer control, in particular to a computer power supply for detecting the opening of a case and a case opening control method.

Background

The household or office computer does not allow a user or other people to open the case privately in some occasions due to the requirement of data confidentiality and safety. There is therefore a need for a chassis opening detection function that provides a warning in the event of an unauthorized intrusion into a computer chassis.

In order to solve the problem, at present, a part of desktop computers are provided with an anti-invasion object key switch on one side of a chassis close to a chassis cover which can be opened, and the key switch bounces after the chassis cover is opened; when the chassis cover is closed, the button is pressed. The anti-intrusion switch is connected to CI pins (namely, the side panel of the case is opened and the detection pins) of the computer mainboard through wires, and the case cover is detected to be opened or not through the key unpacking detection module arranged on the computer mainboard. Then, this approach requires the user to enter the BIOS (i.e., BIOS) to turn on the "boot detect" function.

According to the mode, the anti-intrusion switch is only required to be installed at the corresponding position of the case, the 2-pin plug is inserted into the CI pin of the mainboard, and the BIOS system of the mainboard is set for use. However, the above solutions can only be applied to computer motherboards with special functions, and most of the motherboards in the market do not have the functions. Therefore, a new case opening detection scheme is needed to be designed, the case opening detection scheme can be used with a mainboard which is publicly sold in the market, and one more choice is provided for a user on the premise of not replacing the mainboard.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a computer power supply and a chassis opening control method for detecting the opening of a chassis.

In order to solve the technical problems, the invention adopts the following technical scheme:

a computer power supply for detecting the opening of a case, which is positioned on one side of an opening panel of the case and is connected with a main board of a computer, comprises: the device comprises a filtering and protecting module, a power supply conversion module, an opening detection module, an alarm module, a connector connected with a computer mainboard, an instruction input module and a control module;

the control module enables the alarm module to output alarm information and sends startup warning information to each computer mainboard through the connector; when the instruction input module receives the alarm elimination instruction, the control module enables the alarm module to stop alarming.

As an improvement of the present invention, the box opening detection module includes: switch, first resistance, second resistance and electric capacity, the one end of control module and electric capacity is connected to the one end of switch, also through first resistance connection VDD supply end, and the other end ground connection of switch, the other end of electric capacity passes through second resistance ground connection.

As an improvement of the invention, the alarm module comprises: the base electrode of the triode is connected with the control module through the fourth resistor, the collector electrode of the triode is connected with the negative electrode of the buzzer through the third resistor, and the emitting electrode of the triode is grounded.

As an improvement of the invention, the power conversion module comprises a 3.3V converter, a 5V converter and a 12V converter, one end of the 3.3V converter, one end of the 5V converter and one end of the 12V converter are connected with the filtering and protecting module, and the other end of the 3.3V converter, the other end of the 5V converter and the other end of the 12V converter are connected with the connector.

As a further improvement of the invention, the control module comprises a singlechip, an auxiliary power supply module and a battery, wherein the auxiliary power supply module and the battery are both connected with the singlechip.

As a further improvement of the invention, the instruction input module is a UART interface or a USB interface.

As a further improvement of the invention, the connector is an ATX stand.

The invention also provides a computer power supply case opening control method, which comprises the following steps:

when the computer is started, the control module detects whether the key signal of the unpacking detection module generates rising edge interruption or not;

when the detection key signal generates rising edge interruption, the alarm module outputs an alarm signal and stores alarm information.

As a further improvement of the present invention, after the step of outputting the alarm signal by the alarm module and storing the alarm information when the detection key signal generates the rising edge interruption, the method further includes:

prompting whether the computer is allowed to be started or not when the computer is started every time;

when the computer is allowed to be started, an alarm signal is output in the starting process of the computer; when the computer is not allowed to be started, an alarm signal is output when the computer runs.

an alarm eliminating instruction is input through the instruction input module, and the control module restores the detection state from the alarm state.

Compared with the prior art, the computer power supply for detecting the opening of the case and the case opening control method provided by the invention have the advantages that when the case opening detection module detects the opening of the case opening panel, the case opening panel is fed back to the control module, the control module enables the alarm module to output alarm information, and the computer main boards send starting warning information through the connectors; when the instruction input module receives the alarm elimination instruction, the control module enables the alarm module to stop alarming. The invention adds the function of detecting the case opening without changing the mainboard of the computer, and can give an alarm in time when the case is detected to be opened, even can close the computer.

Drawings

Fig. 1 is a block diagram of a connection structure between a computer power supply and a computer motherboard for detecting the opening of a chassis according to the present invention.

Fig. 2 is a block diagram of a power supply of a computer for detecting the opening of a chassis according to the present invention.

Fig. 3 is a schematic circuit diagram of an opening detection module of a computer power supply for detecting the opening of a chassis according to the present invention.

Fig. 4 is a schematic circuit diagram of an alarm module of a computer power supply for detecting the opening of a chassis according to the present invention.

Fig. 5 is a flowchart of a chassis opening control method provided in the present invention.

Fig. 6 is an application schematic diagram of the chassis opening control method provided by the present invention.

Description of the reference numerals

Computer mainboard 1, computer power 2, filtering and protecting module 21, power converting module 22, 3.3V

converter

221, 5V converter 222, 12V converter 223, box opening detecting module 23, alarm module 24, connector 25, instruction input module 26, control module 27, single chip microcomputer 271, auxiliary power module 272, battery 273, switch K1, first resistor R1, second resistor R2, capacitor C1, triode Q1, third resistor R3, fourth resistor R4 and buzzer BZ1

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

According to the computer power supply 2 for detecting the opening of the case, when the case of the computer is opened, the computer can prompt that the case is invaded every time the computer is started, and the prompt can be eliminated only by authorization of an administrator. Referring to fig. 1 and 2, the computer power supply 2 is located at one side of the case opening panel and electrically connected to the computer motherboard 1, and includes: the device comprises a filtering and protecting module 21, a power supply conversion module 22, an opening detection module 23, an alarm module 24, a connector 25 connected with the computer mainboard 1, an instruction input module 26 and a control module 27.

The filtering and protecting module 21, the power supply conversion module 22, the box opening detecting module 23, the alarm module 24, the connector 25 and the instruction input module 26 are connected with the control module 27, the connector 25 is connected with the computer mainboard 1, one side of the box opening detecting module 23 is a box opening touch key which is abutted against a panel of a computer case and is in a pressing state in a normal state, and the box opening touch key is released when the box is opened. The filtering and protecting module 21 filters the incoming direct-current voltage and sends the filtered direct-current voltage to the power supply converting module 22 to be converted into voltage required by the work of the computer, the box opening detecting module 23 feeds back the voltage to the control module 27 when detecting that the opening panel of the chassis is opened, the control module 27 enables the alarm module 24 to output alarm information and sends startup warning information to the computer mainboard 1 through the connector 25; when the command input module 26 receives the alarm cancellation command, the control module 27 causes the alarm module 24 to stop the alarm.

In this embodiment, the dc input is generally a voltage signal input by a plug of the computer power supply 2, and the connector 25 is an ATX socket, which is a 24-pin socket, and is connected to and communicates with the ATX socket of the computer motherboard 1 through a data line. The instruction input module 26 is a UART interface or a USB interface, and is used for man-machine interaction and mainly for inputting an alarm release instruction.

Referring to fig. 1 and fig. 2, the power conversion module 22 includes a 3.3V converter 221, a 5V converter 222, and a 12V converter 223, one end of the 3.3V converter 221, one end of the 5V converter 222, and one end of the 12V converter 223 are connected to the filtering and protecting module 21, the other end of the 3.3V converter 221, the other end of the 5V converter 222, and the other end of the 12V converter 223 are connected to the connector 25, and the input voltage is converted into voltages of 3.3V, 5V, and 12V required by the computer motherboard 1 to operate as a module through the power conversion module 22.

Preferably, the control module 27 includes a single chip microcomputer 271, an auxiliary power module 272 and a battery 273, both the auxiliary power module 272 and the battery 273 are connected to the single chip microcomputer 271, the single chip microcomputer 271 is powered by the +5VSB voltage generated by the auxiliary power module 272 when the computer is running, and the battery 273 is powered when the computer is shut down, so that the computer can perform the case power-on detection in both power-on and power-off states.

In this embodiment, the single chip microcomputer 271 may be an 8051 single chip microcomputer 271, such as a new tang N76E003AT 20. A Cortex-M singlechip 271 and an STM32G030 semiconductor adopting a Ruyi method can also be used, and only alarm information is output and is communicated with the computer mainboard 1 according to the detection result of the unpacking detection module 23.

The peripheral circuit of the single chip microcomputer 271 includes an auxiliary power supply module 272 (i.e., a +5VSB converter), a reset circuit, a crystal circuit, and the like, wherein the reset circuit is used for generating a reset signal, and the crystal circuit is mainly a crystal oscillator and is used for assisting the single chip microcomputer 271 to generate a working clock.

The case opening detection module 23 is used for detecting the case opening, is connected with a GPIO port of the singlechip 271, and feeds back a detection result in real time. The alarm module 24 is also connected with a GPIO port of the singlechip 271, and can alarm through sound or light.

In fig. 2, a PSON signal (POWER Supply-ON, computer POWER ON) is from the computer motherboard 1, when the computer POWER ON key is pressed, the PSON output by the motherboard changes from high level to low level, and the PSON signal is connected to the GPIO of the single chip microcomputer 271. The FPO signal is used for starting the +12V, +5V and +3.3V voltage converters and is generated by GPIO of the singlechip 271. The PG signal is used for indicating voltage readiness and is generated by using GPIO of the singlechip 271.

Referring to fig. 3, the unpacking detecting module 23 includes: switch K1, first resistance R1, second resistance R2 and electric capacity C1, the one end of control module 27 and electric capacity C1 is connected to one end of switch K1, also connects the VDD power supply end through first resistance R1, the other end ground connection of switch K1, the other end of electric capacity C1 is through second resistance R2 ground connection.

The VDD power supply terminal is the power supply voltage of the single chip microcomputer 271 (i.e., the voltage output by the battery 273 or the auxiliary power module 272), and the first resistor R1 is a pull-up resistor with a resistance value of 4.7k Ω to 10k Ω. The second resistor R2 and the capacitor C1 form a key anti-shake circuit (i.e., the switch K1 is anti-shake), wherein the resistance of the second resistor R2 is preferably 100 Ω, and the capacitance of the capacitor C1 is preferably 0.1 uF. Switch K1 is key switch K1, opens the panel butt with the quick-witted case, and the button releases when the machine case is started to make the corresponding GPIO mouth of singlechip 271 detect the high level.

Specifically, the chassis open detection switch K1 is disposed below the panel on which the chassis can be opened. When the chassis panel is closed, the switch K1 is pressed, and a low-level KEY signal is output to the GPIO of the single chip microcomputer 271. When the chassis panel is turned on, the switch K1 is released, and the KEY signal outputs a high level (VDD) to the GPIO of the single chip microcomputer 271. Since the GPIO of the single chip 271 is set to the external interrupt mode triggered by the rising edge, the KEY signal can be detected in real time to determine whether the chassis is opened.

Referring to fig. 4, the alarm module 24 includes: the triode Q1, the third resistor R3, the fourth resistor R4 and the buzzer BZ1, the base of the triode Q1 is connected with the control module 27 through the fourth resistor R4, the collector of the triode Q1 is connected with the negative electrode of the buzzer BZ1 through the third resistor R3, and the emitter of the triode Q1 is grounded.

The VDD power supply end is the power supply voltage of the single chip microcomputer 271 (i.e., the voltage output by the battery 273 or the auxiliary power module 272), the buzzer BZ1 is an active or passive buzzer BZ1, and the third resistor R3 can select a specific resistance value to adjust the volume of the buzzer BZ 1. The triode Q1 is an NPN triode Q1, when the situation that the chassis is started is detected, the corresponding GPIO port of the singlechip 271 outputs high level, the triode Q1 is conducted, the negative electrode of the buzzer BZ1 is pulled low, and therefore the buzzer BZ1 sounds.

Of course, the invention can also adopt or add a mode of LED light alarm, and the circuit thereof can replace the buzzer BZ1 in fig. 4 with a light emitting diode, since only the alarm device is different, the circuit structure is completely the same, and this will not be described in detail here. When the single chip microcomputer 271 detects that the case is opened, alarm information is generated through a buzzer BZ1 and/or a Light Emitting Diode (LED).

Optionally, the filtering and protecting module 21 includes a filter circuit and a protecting circuit, the filter circuit is used for filtering high-frequency noise in the input dc voltage, and the low-pass filter circuit composed of an inductor and a capacitor C1 may be used for filtering according to the present invention. The protection circuit is used for absorbing transient voltage impact in input direct current voltage, and the TVS diode or the TVS diode array is connected with the filter circuit in parallel.

Furthermore, the common input voltage of the computer has the wide range voltage of 12V, 24V, 48V or 8-14V, different voltage conversion topologies can be selected according to the difference of the input voltage, and when the input voltage is constant 12V, a load switch K1 is formed by a P-channel MOSFET or an N-channel MOSFET to generate +12V output; when the input voltage is 24V or 48V, adopting a voltage reduction type DC-DC (direct current power switch K1 module) to generate +12V output; when the input voltage is in a wide range of 8-14V, the +12V output is generated by adopting the step-up and step-down DC-DC. The voltage converter for generating +5V, +3.3V, and +5VSB may also use the step-down DC-DC to generate +5V, +3.3V, and +5VSB outputs.

Based on the computer power supply for detecting the case opening, the present invention further provides a case opening control method, please refer to fig. 5 and 6, which includes:

s1, when the computer is started, the control module detects whether the key signal of the unpacking detection module generates a rising edge interrupt or not.

In the computer power supply, the singlechip only has an IDLE (IDLE is a debugging window and is called as an integrated development environment by a professional term) standby state and an alarm state. After the singlechip is reset, the singlechip defaults to enter an IDLE standby state.

And S2, when the rising edge of the detection key signal is interrupted, the alarm module outputs an alarm signal and stores the alarm information.

The singlechip is provided with two independent state machines: the first state machine is used for controlling the on-off of the computer, and the second state machine is used for detecting the opening of the case and giving an alarm. The single chip microcomputer defaults to a standby state, when the single chip microcomputer detects that a KEY signal from a case opening KEY is interrupted in a rising edge mode, or the single chip microcomputer periodically inquires the level of the KEY signal to find that the KEY signal is high level, the case is considered to be opened, the single chip microcomputer enters an alarm state, and alarm information is generated.

When the single chip microcomputer detects that the case is opened, the information is stored in Flash inside the single chip microcomputer, and the single chip microcomputer controls the buzzer and/or the light emitting diode to generate alarm information.

Further, after step S2, the method for controlling the opening of the chassis further includes:

s31, prompting whether the computer is allowed to be started or not when the computer is started every time;

s32, when the computer is allowed to start, normally entering a computer operating system, and outputting an alarm signal in the starting process of the computer; when the computer is not allowed to be started, the alarm signal is output when the computer runs until the computer stops alarming, so that the electric quantity of the battery is saved.

Specifically, when the computer is allowed to be started, an alarm mode can be prompted, wherein the alarm mode is as follows: and intermittently outputting abnormal alarm information or continuously outputting the abnormal alarm information.

Further, after step S2, the method for controlling the opening of the chassis further includes: an alarm eliminating instruction is input through the instruction input module, and the control module restores the detection state from the alarm state.

When the case is opened, the computer power supply can record opening information and continuously or intermittently send out warning information. If the warning information needs to be eliminated, a UART (universal asynchronous receiver/transmitter) or USB (universal serial bus) interface of a power supply can be used for man-machine interaction, and a special command is input to eliminate the warning information. The special command is owned by a computer administrator, and when the alarm is eliminated, the single chip microcomputer returns to an IDLE standby state from an alarm state.

The starting control mode of the computer power supply provided by the invention comprises the following steps:

in the process of starting up the computer, when the control module detects that the falling edge of a computer starting-up signal is interrupted, the power supply conversion module is started to output 3.3V, 5V and 12V voltages;

and 3.3V, 5V and 12V voltages are output to the computer mainboard through the connector.

Specifically, in the IDLE standby state, how to interrupt the PSON falling edge occurs, the voltage converter of +12V, +5V and +3.3V is turned on to generate voltage output, a PG (Power Good) voltage ready signal is generated after a delay according to the ATX protocol standard, the computer starts up after receiving the PG signal, and the single chip completes the Power-on control.

The shutdown control mode of the computer power supply provided by the invention comprises the following steps:

when the control module detects that the computer startup signal is at a high level, the single chip microcomputer considers that the computer is shut down, the state of the single chip microcomputer is switched to an IDLE standby state, the +12V, +5V and +3.3V output is cut off, and the single chip microcomputer completes shutdown control.

In summary, the present invention provides a dc computer power supply, which has a function of detecting the opening of a chassis, and can give a warning or even stop the operation of the computer when the chassis is detected to be opened. Compared with the prior art, the chassis opening detection function can be realized by using a general mainboard sold on the market without customizing the mainboard.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The utility model provides a computer power supply for detecting machine case is opened, is located machine case and opens panel one side to be connected with the computer motherboard, its characterized in that includes: the device comprises a filtering and protecting module, a power supply conversion module, an opening detection module, an alarm module, a connector connected with a computer mainboard, an instruction input module and a control module;

2. The computer power supply for detecting the opening of a chassis of claim 1, wherein the opening detection module comprises: switch, first resistance, second resistance and electric capacity, the one end of control module and electric capacity is connected to the one end of switch, also through first resistance connection VDD supply end, and the other end ground connection of switch, the other end of electric capacity passes through second resistance ground connection.

3. The computer power supply for detecting cabinet opening of claim 1, wherein the alarm module comprises: the base electrode of the triode is connected with the control module through the fourth resistor, the collector electrode of the triode is connected with the negative electrode of the buzzer through the third resistor, and the emitting electrode of the triode is grounded.

4. The computer power supply for detecting the case opening according to claim 1, wherein the power conversion module comprises a 3.3V converter, a 5V converter and a 12V converter, one end of the 3.3V converter, one end of the 5V converter and one end of the 12V converter are connected to the filtering and protecting module, and the other end of the 3.3V converter, the other end of the 5V converter and the other end of the 12V converter are connected to the connector.

5. The computer power supply for detecting the opening of the case as claimed in claim 1, wherein the control module comprises a single chip microcomputer, an auxiliary power supply module and a battery, and both the auxiliary power supply module and the battery are connected with the single chip microcomputer.

6. The computer power supply for detecting the opening of a case according to claim 1, wherein the command input module is a UART interface or a USB interface.

7. The computer power supply for detecting the opening of a chassis of claim 1, wherein the connector is an ATX stand.

8. A method for controlling the opening of a case of a computer power supply according to any one of claims 1 to 7, comprising:

9. The chassis opening control method according to claim 8, wherein after the step of outputting an alarm signal by the alarm module and storing the alarm information when the detection key signal is interrupted by a rising edge, the method further comprises:

10. The chassis opening control method according to claim 8, wherein after the step of outputting an alarm signal by the alarm module and storing the alarm information when the detection key signal is interrupted by a rising edge, the method further comprises: