Power failure protection circuit system of industrial personal computer

Abstract

The invention discloses a power failure protection circuit system of an industrial personal computer, one end of the power failure protection circuit system is connected with the industrial personal computer, and the other end of the power failure protection circuit system is connected with a power adapter of the industrial personal computer; the power failure protection circuit system comprises a main control circuit, a battery module, a battery control module, a battery charging module, a battery voltage detection module, an automatic switching module, a power failure detection module, an industrial personal computer control module and an industrial personal computer current detection module. The automatic switching module is connected with a power adapter and a battery input boosting module of the industrial personal computer and is used for automatically switching a boosted power supply of the battery module when an external power supply of the industrial personal computer is powered down; the industrial personal computer control module is used for controlling power input of an industrial personal computer; the industrial personal computer current detection module is used for detecting the current of the industrial personal computer and judging whether the industrial personal computer is shut down or not. According to the power failure protection circuit system of the industrial personal computer, after the external power supply of the industrial personal computer is powered off, the power supply is switched to the battery for power supply, and meanwhile, a shutdown prompt is given, so that the power failure of the industrial personal computer after normal shutdown is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of power-off protection, and relates to a power-off protection circuit system, and in particular to a power-off protection circuit system for an industrial computer. Background Art

[0002] Industrial control computers, referred to as IPCs, are modified from personal computers to make their system structure and functional module division more suitable for the requirements of industrial process control. In addition to the rich software resources and convenient development of general microcomputers, IPCs also have the characteristics of high reliability, good real-time performance, good hardware configuration scalability, and good maintainability due to necessary modifications, making them more suitable for industrial applications.

[0003] Industrial computers often operate in harsh environments and have higher requirements for data security. Power outages and human operations may cause power outages on industrial computers, which may affect normal work due to data not being saved in time, or cause system crashes and hard disk damage.

[0004] In view of this, there is an urgent need to design a power-off protection method for industrial computers so as to overcome at least some of the above-mentioned defects of existing industrial computers. Summary of the invention

[0005] The invention provides an industrial computer power-off protection circuit system, which can switch to battery power supply after the external power supply of the industrial computer fails, and give a shutdown prompt at the same time, so as to ensure that the industrial computer is powered off after being shut down normally.

[0006] To solve the above technical problem, according to one aspect of the present invention, the following technical solution is adopted:

[0007] A power-off protection circuit system for an industrial computer, wherein one end of the power-off protection circuit system is connected to the industrial computer, and the other end is connected to a power adapter of the industrial computer, and the power adapter is connected to an external power supply;

[0008] The power-off protection circuit system includes: a main control circuit, a battery module, a battery control module, a battery input boost module, a battery charging module, a battery voltage detection module, an automatic switching module, a power-off detection module, an industrial computer control module and an industrial computer current detection module;

[0009] The battery module is connected to the industrial computer through the battery input boost module to serve as a backup power supply for the industrial computer;

[0010] The battery charging module is connected to the power adapter of the industrial computer and the battery module, and can use an external power source to charge the battery module;

[0011] The battery voltage detection module is connected to the battery module to measure the voltage of the battery module;

[0012] The power failure detection module is connected to the power adapter to determine whether the external power supply is powered off;

[0013] The battery input boost module is connected to the battery module and is used to increase the voltage of the battery module to a set value and then output it;

[0014] The automatic switching module is connected to the power adapter of the industrial computer and the battery input boost module, so as to automatically switch the boosted power supply of the battery module when the external power supply of the industrial computer is powered off;

[0015] The battery control module is used to control the working state of the battery module;

[0016] The main control circuit is connected to the industrial computer and the current detection module of the industrial computer, and sends power-off information, shutdown information and battery voltage information to the industrial computer;

[0017] The industrial computer control module is used to control the power input of the industrial computer; the industrial computer current detection module is used to detect the current of the industrial computer and determine whether the industrial computer is shut down.

[0018] As an implementation manner of the present invention, the power-off protection circuit system further includes an alarm module, and the alarm module is used to send an alarm message after the industrial computer loses power.

[0019] As an implementation manner of the present invention, the power-off protection circuit system further includes a communication module, and the main control circuit communicates with the industrial computer through the communication module.

[0020] As an implementation mode of the present invention, the industrial computer control module is normally turned on, and is turned off after determining that the industrial computer cannot be self-started, and is turned on after the industrial computer consumes power.

[0021] As an implementation mode of the present invention, the current detection module of the industrial computer adopts a resistance low-end detection method, and outputs the current to the single-chip microcomputer through an operational amplifier.

[0022] As an implementation mode of the present invention, the power-off detection circuit includes a comparator U6A, a fifth rectifier diode D5, a third zero resistor R30, a third second resistor R32, and a second eighth pull-up resistor R28;

[0023] The anode of the fifth rectifier diode D5 is connected to the adapter power input of the industrial computer, the cathode of the fifth rectifier diode D5 is connected to the first end of the third zero resistor R30, the second end of the third zero resistor R30 is respectively connected to the inverting input end of the comparator U6A and the first end of the third second resistor R32; the second end of the third second resistor R32 is grounded;

[0024] The non-inverting input terminal of the comparator U6A is connected to the set power supply voltage, the output terminal of the comparator U6A is connected to the second end of the second eight-pull-up resistor R28 and the input terminal of the main control circuit, and the first end of the second eight-pull-up resistor R28 is connected to the set power supply voltage.

[0025] As an embodiment of the present invention, the battery voltage detection circuit includes a follower amplifier U5B, a second fifth resistor R25, and a second sixth resistor R26; the first end of the second fifth resistor R25 is connected to the battery module voltage, the second end of the second fifth resistor R25 is respectively connected to the first end of the second sixth resistor R26 and the positive input end of the follower amplifier U5B, and the output end of the follower amplifier U5B is respectively connected to the inverting input end of the follower amplifier U5B and the input end of the main control circuit; the second end of the second sixth resistor R26 is grounded.

[0026] As an implementation mode of the present invention, the industrial computer current detection circuit includes a common-phase amplifier U5A, a first eight-amplification resistor R18, a first nine-amplification resistor R19, and a ninth zero sampling resistor R90;

[0027] The non-inverting input terminal of the in-phase amplifier U5A is connected to the second end of the ninth zero sampling resistor R90, and the first end of the ninth zero sampling resistor R90 is grounded;

[0028] The inverting input terminal of the common-mode amplifier U5A is respectively connected to the first terminal of the first eight-amplification resistor R18 and the second terminal of the first nine-amplification resistor R19; the output terminal of the common-mode amplifier U5A is connected to the second terminal of the first eight-amplification resistor R18 and the input terminal of the main control circuit; the first terminal of the first nine-amplification resistor R19 is grounded.

[0029] As an embodiment of the present invention, the automatic switching module circuit includes a fourth current limiting resistor R4, a second zero current limiting resistor R20, a first second rectifier diode D12, a second third rectifier diode D23, a third switch MOS tube Q3, a second energy storage capacitor C2, and a fifth energy storage capacitor C5; the S stage of the switch MOS tube Q3 is connected to the D12_battery input after the battery is boosted, the D stage is connected to the first end of the rectifier diode D12, the G stage is connected to the second end of the current limiting resistor R20, the first end of the current limiting resistor R20 is connected to the power adapter P12V input, the first end of the current limiting resistor R4 is grounded, the second stage is connected to the power adapter P12V input, and the second end of the rectifier diode D12 is connected Connected to D12V output, the first end of the rectifier diode D23 is connected to the power adapter P12V input, and the second end is connected to the D12V output; the first ends of the energy storage capacitors C2 and C5 are connected to the D12V output, and the second ends are grounded. When P12V has an input, the switch MOS tube Q3 is turned off, and D12V is provided by P12V flowing through the rectifier diode D23. When P12V is suddenly disconnected, the switch MOS tube Q3 is turned on, and D12V is provided by the D12_battery input flowing through the switch MOS tube Q3 and the rectifier diode D12, and there will be no phenomenon of P12V backflowing into D12_battery and no phenomenon of P12V priority changing due to the voltage difference between P12V and D12_battery;

[0030] The battery control module circuit includes a third eight-voltage-dividing resistor R38, a fourth two-voltage-dividing resistor R42, a fourth four-current-limiting resistor R44, a sixth switch MOS tube Q6, and an eighth switch MOS tube Q8; the S stage of the switch MOS tube Q6 is connected to the battery input B8.4V, the D stage is connected to the DO_B8.4V output, the G stage is connected to the second end of the current-limiting resistor R38, the first end of the current-limiting resistor R38 is connected to the battery B8.4V input, the first end of the current-limiting resistor R42 is connected to the G stage of the switch MOS tube Q6, the second stage is connected to the S stage of the switch MOS tube Q8, and the switch M The D level of OS tube Q8 is grounded, and the G level is connected to the microcontroller control pin MCU_DO_B8.4V. The first end of the current limiting resistor R44 is connected to the microcontroller control pin MCU_DO_B8.4V, and the second end is grounded. When the industrial computer adapter power supply P12V is connected, the microcontroller starts, controls the switch MOS tube Q8 to be turned on, thereby turning on the switch MOS tube Q6, and DO_B8.4V has an output. When the external power is cut off and the industrial computer is detected to be shut down normally, the microcontroller switch MOS tube Q8 is turned off, thereby turning off the switch MOS tube Q6, and the entire system is powered off.

[0031] As an implementation mode of the present invention, the battery voltage detection module is connected to the battery module to measure the voltage of the battery module, and record each shutdown time and the degree of battery voltage drop, and establish a mathematical model in combination with the current detection of the industrial computer, calculate the battery capacity, analyze the power consumption required for the load to complete the shutdown action, predict the time and number of times the battery can be used normally, and give an early warning to replace the battery, and can give priority to saving data and shutting down the hard disk when the battery power is insufficient to support the normal shutdown process;

[0032] The industrial computer power-off protection circuit system includes a battery usage time estimation model construction module, which is used to construct a battery usage time estimation model; obtain the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, battery usage status data, and battery usage time data from historical data, and learn the calculation method of the battery remaining usage time data based on the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, and battery usage status data obtained from the historical data to form a battery usage time estimation model.

[0033] The beneficial effect of the present invention is that the industrial computer power-off protection circuit system proposed by the present invention can switch to battery power supply after the external power supply of the industrial computer fails, and at the same time give a shutdown prompt to ensure that the industrial computer is shut down normally before it powers off itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure is a schematic diagram of the composition of the power-off protection circuit system of an industrial computer in one embodiment of the present invention.

[0035] Figure 2 FIG. 4 is a circuit diagram of a power-off detection circuit in an embodiment of the present invention.

[0036] Figure 3 FIG. 4 is a circuit diagram of a battery voltage detection circuit in an embodiment of the present invention.

[0037] Figure 4 The figure is a circuit diagram of a current detection circuit of an industrial computer in one embodiment of the present invention.

[0038] Figure 5 FIG. 4 is a circuit diagram of an automatic switching module in an embodiment of the present invention.

[0039] Figure 6 FIG. 4 is a circuit diagram of a battery control module in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0042] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced within the scope of the present invention.

[0043] The description of the steps in each embodiment in the specification is only for the convenience of explanation, and the implementation method of the present application is not limited by the order of implementation of the steps.

[0044] The term "connection" as used in the specification includes both direct connection and indirect connection, such as connection through some active devices, passive devices or electrically conductive media; it may also include connection through other active devices or passive devices known to those skilled in the art on the basis of achieving the same or similar functional purposes, such as connection through circuits or components such as switches and follower circuits.

[0045] The present invention discloses a power-off protection circuit system for an industrial computer. Figure 1 FIG. 1 is a schematic diagram of the composition of the power-off protection circuit system of the industrial computer in one embodiment of the present invention; please refer to FIG. Figure 1 One end of the power-off protection circuit system is connected to the industrial computer, and the other end is connected to the power adapter of the industrial computer, and the power adapter is connected to an external power supply.

[0046] The power-off protection circuit system includes: a main control circuit 1, a battery module 2, a battery control module 3, a battery charging module 4, a battery voltage detection module 5, a battery input boost module 6, an automatic switching module 7, a power-off detection module 8, an industrial computer control module 9 and an industrial computer current detection module 10.

[0047] The battery module 2 is connected to the industrial computer through the battery input boost module 6 as a backup power supply for the industrial computer. In one embodiment, the battery module 2 can use an 8.4V / 3000mAh battery, which can support a 12V / 2A industrial computer to work continuously for half an hour.

[0048] The battery charging module 4 is connected to the power adapter of the industrial computer and the battery module 2, and can use an external power source to charge the battery module 2; while charging, it can also detect the battery temperature, and enter the sleep mode when the external adapter is disconnected.

[0049] The battery voltage detection module 5 is connected to the battery module 2 to measure the voltage of the battery module 2 .

[0050] The power failure detection module 8 is connected to a power adapter to determine whether an external power supply fails.

[0051] The battery input boost module 6 is connected to the battery module 2 to increase the voltage of the battery module 2 to a set value for output; in one embodiment, the battery voltage is increased to 11.5V for output.

[0052] The automatic switching module 7 is connected to the power adapter of the industrial computer and the battery input boost module 6 to automatically switch to the boosted power supply of the battery module 6 when the external power supply of the industrial computer is powered off.

[0053] The battery control module 3 is used to control the working state of the battery module 2. In one embodiment, the battery control module 3 is used to control the battery output, normally closed, powered on, and closed after detecting that the industrial control unit is shut down to power off the system.

[0054] The main control circuit 1 is connected to an industrial computer and an industrial computer current detection module 10, and sends power-off information, shutdown information and battery voltage information to the industrial computer. In one embodiment, the main control circuit 1 includes a single-chip microcomputer.

[0055] The industrial computer control module 9 is used to control the power input of the industrial computer. In one embodiment, the industrial computer control module 9 is normally turned on, and is turned off after determining that the industrial computer cannot start by itself, and is turned on after the industrial computer consumes power.

[0056] The IPC current detection module 10 is used to detect the IPC current and determine whether the IPC is turned off. In one embodiment, the IPC current detection module 10 uses a resistor low-end detection method and outputs the amplified output to the single-chip microcomputer through an operational amplifier.

[0057] In addition, the power-off protection circuit system may further include an alarm module and a communication module 11 ; the alarm module is used to send an alarm message after the industrial computer loses power; and the main control circuit 1 communicates with the industrial computer through the communication module 11 .

[0058] Figure 2 FIG. 1 is a circuit diagram of a power failure detection circuit in an embodiment of the present invention; please refer to FIG. Figure 2In one embodiment of the present invention, the power-off detection circuit includes a comparator U6A, a fifth rectifier diode D5, a third zero resistor R30, a third second resistor R32, and a second eighth pull-up resistor R28. The positive electrode of the fifth rectifier diode D5 is connected to the adapter power input of the industrial computer, the negative electrode of the fifth rectifier diode D5 is connected to the first end of the third zero resistor R30, the second end of the third zero resistor R30 is respectively connected to the inverting input end of the comparator U6A and the first end of the third second resistor R32; the second end of the third second resistor R32 is grounded. The positive input end of the comparator U6A is connected to the set power supply voltage, the output end of the comparator U6A is connected to the second end of the second eighth pull-up resistor R28 and the input end of the main control circuit, and the first end of the second eighth pull-up resistor R28 is connected to the set power supply voltage.

[0059] The battery voltage detection circuit can output to the single chip microcomputer through resistor voltage division and operational amplifier following to measure the battery voltage. Figure 3 is a circuit diagram of a battery voltage detection circuit in one embodiment of the present invention; please refer to Figure 3 In one embodiment of the present invention, the battery voltage detection circuit includes a follower amplifier U5B, a second fifth resistor R25, and a second sixth resistor R26; the first end of the second fifth resistor R25 is connected to the battery module voltage, the second end of the second fifth resistor R25 is respectively connected to the first end of the second sixth resistor R26 and the non-inverting input end of the follower amplifier U5B, and the output end of the follower amplifier U5B is respectively connected to the inverting input end of the follower amplifier U5B and the input end of the main control circuit; the second end of the second sixth resistor R26 is grounded.

[0060] Figure 4 is a circuit diagram of an industrial computer current detection circuit in one embodiment of the present invention; please refer to Figure 4 In one embodiment of the present invention, the industrial computer current detection circuit includes a common-phase amplifier U5A, a first eight-amplification resistor R18, a first nine-amplification resistor R19, and a ninth zero sampling resistor R90. The non-inverting input terminal of the common-phase amplifier U5A is connected to the second end of the ninth zero sampling resistor R90, and the first end of the ninth zero sampling resistor R90 is grounded. The inverting input terminal of the common-phase amplifier U5A is respectively connected to the first end of the first eight-amplification resistor R18 and the second end of the first nine-amplification resistor R19, and the output terminal of the common-phase amplifier U5A is connected to the second end of the first eight-amplification resistor R18 and the input terminal of the main control circuit; the first end of the first nine-amplification resistor R19 is grounded.

[0061] In one use scenario of the invention, the power-off protection circuit system of the industrial computer is connected between the adapter and the industrial computer. After the power adapter of the industrial computer is powered on, the battery control module switch is turned on, and the battery power is ready. When the adapter is powered off, the battery power supply is automatically switched, and the power-off detection module detects the power-off information. The single-chip computer sends the power-off information and shutdown information to the industrial computer, and reports the battery voltage information at the same time. When the industrial computer is detected to be shut down, the battery control module switch is turned off, the entire system is shut down, and the battery charging chip enters the sleep mode. If the adapter is detected to be powered on before the battery control module switch is turned off, the power of the industrial computer will be turned off first, and the power of the industrial computer will be turned on after the industrial computer consumes power, so that the industrial computer can start automatically.

[0062] Figure 5 is a circuit diagram of an automatic switching module in one embodiment of the present invention; please refer to Figure 5 In one embodiment of the present invention, the automatic switching module circuit includes a fourth current limiting resistor R4, a second zero current limiting resistor R20, a first second rectifier diode D12, a second third rectifier diode D23, a third switch MOS tube Q3, a second energy storage capacitor C2, and a fifth energy storage capacitor C5. The S stage of the switch MOS tube Q3 is connected to the D12_battery input after the battery is boosted, the D stage is connected to the first end of the rectifier diode D12, the G stage is connected to the second end of the current limiting resistor R20, the first end of the current limiting resistor R20 is connected to the power adapter P12V input, the first end of the current limiting resistor R4 is grounded, the second stage is connected to the power adapter P12V input, the second end of the rectifier diode D12 is connected to the D12V output, the first end of the rectifier diode D23 is connected to the power adapter P12V input, and the second end is connected to the D12V output; the energy storage capacitor The first ends of C2 and C5 are connected to the D12V output, and the second ends are grounded. When P12V has an input, the switch MOS tube Q3 is turned off, and D12V is provided by P12V flowing through the rectifier diode D23. When P12V is suddenly disconnected, the switch MOS tube Q3 is turned on, and D12V is provided by the D12_battery input flowing through the switch MOS tube Q3 and the rectifier diode D12. There will be no phenomenon of P12V backflowing into D12_battery and no phenomenon of P12V priority changing due to the voltage difference between P12V and D12_battery.

[0063] Figure 6 is a circuit diagram of a battery control module in one embodiment of the present invention; please refer to Figure 6In one embodiment of the present invention, the battery control module circuit includes a third eight-voltage-dividing resistor R38, a fourth two-voltage-dividing resistor R42, a fourth four-current-limiting resistor R44, a sixth switch MOS tube Q6, and an eighth switch MOS tube Q8. The S stage of the switch MOS tube Q6 is connected to the battery input B8.4V, the D stage is connected to the DO_B8.4V output, the G stage is connected to the second end of the current limiting resistor R38, the first end of the current limiting resistor R38 is connected to the battery B8.4V input, the first end of the current limiting resistor R42 is connected to the G stage of the switch MOS tube Q6, the second stage is connected to the S stage of the switch MOS tube Q8, the D stage of the switch MOS tube Q8 is grounded, the G stage is connected to the single-chip computer control pin MCU_DO_B8.4V, the first end of the current limiting resistor R44 is connected to the single-chip computer control pin MCU_DO_B8.4V, and the second end is grounded; when the industrial computer adapter power supply P12V is connected, the single-chip computer starts, controls the switch MOS tube Q8 to be turned on, so that the switch MOS tube Q6 is turned on, and DO_B8.4V has an output, when the external power is off, after detecting that the industrial computer is shut down normally, the single-chip computer switch MOS tube Q8 is turned off, so that the switch MOS tube Q6 is turned off, and the entire system is powered off.

[0064] In one embodiment of the present invention, the battery voltage detection module is connected to the battery module to measure the voltage of the battery module, and record each shutdown time and the degree of battery voltage drop. Combined with the current detection of the industrial computer, a mathematical model is established to calculate the battery capacity, analyze the power consumption required for the load to complete the shutdown action, predict the time and number of times the battery can be used normally, and provide early warning for battery replacement. When the battery power is insufficient to support the normal shutdown process, data can be saved and the hard disk can be turned off first.

[0065] The industrial computer power-off protection circuit system includes a battery usage time estimation model construction module, which is used to construct a battery usage time estimation model; obtain the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, battery usage status data, and battery usage time data from historical data, and learn the calculation method of the battery remaining usage time data based on the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, and battery usage status data obtained from the historical data to form a battery usage time estimation model.

[0066] In summary, the industrial computer power-off protection circuit system proposed in the present invention can switch to battery power supply after the external power supply of the industrial computer fails, and at the same time give a shutdown prompt to ensure that the industrial computer is powered off after normal shutdown.

[0067] It should be noted that the present application can be implemented in software and / or a combination of software and hardware; for example, it can be implemented using an application-specific integrated circuit (ASIC), a general-purpose computer, or any other similar hardware device. In some embodiments, the software program of the present application can be executed by a processor to implement the above steps or functions. Similarly, the software program of the present application (including related data structures) can be stored in a computer-readable recording medium; for example, a RAM memory, a magnetic or optical drive or a floppy disk and the like. In addition, some steps or functions of the present application can be implemented in hardware; for example, as a circuit that cooperates with a processor to perform various steps or functions.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The description and application of the present invention here are illustrative, and it is not intended to limit the scope of the present invention to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be embodied in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. The deformation and change of the embodiments disclosed here are possible, and the replacement of the embodiments and the various equivalent parts are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential features of the present invention. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. A power-off protection circuit system for an industrial computer, characterized in that: One end of the power-off protection circuit system is connected to the industrial computer, and the other end is connected to the power adapter of the industrial computer, and the power adapter is connected to an external power supply; The power-off protection circuit system includes: a main control circuit, a battery module, a battery control module, a battery input boost module, a battery charging module, a battery voltage detection module, an automatic switching module, a power-off detection module, an industrial computer control module and an industrial computer current detection module; The battery module is connected to the industrial computer through the battery input boost module to serve as a backup power supply for the industrial computer; The battery charging module is connected to the power adapter of the industrial computer and the battery module, and can use an external power source to charge the battery module; The battery voltage detection module is connected to the battery module to measure the voltage of the battery module; The power failure detection module is connected to the power adapter to determine whether the external power supply is powered off; The battery input boost module is connected to the battery module and is used to increase the voltage of the battery module to a set value and then output it; The automatic switching module is connected to the power adapter of the industrial computer and the battery input boost module, so as to automatically switch the boosted power supply of the battery module when the external power supply of the industrial computer is powered off; The battery control module is used to control the working state of the battery module; The main control circuit is connected to the industrial computer and the current detection module of the industrial computer, and sends power-off information, shutdown information and battery voltage information to the industrial computer; The industrial computer control module is used to control the power input of the industrial computer; the industrial computer current detection module is used to detect the current of the industrial computer and determine whether the industrial computer is shut down.

2. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The power-off protection circuit system further comprises an alarm module, and the alarm module is used to send an alarm message after the industrial computer loses power.

3. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The power-off protection circuit system further comprises a communication module, and the main control circuit communicates with the industrial computer via the communication module.

4. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The industrial computer control module is normally turned on, and is turned off after determining that the industrial computer cannot start by itself, and is turned on after the industrial computer consumes power.

5. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The current detection module of the industrial computer adopts the low-end detection method of resistance, and outputs to the single-chip microcomputer through amplification by an operational amplifier.

6. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The power-off detection circuit includes a comparator U6A, a fifth rectifier diode D5, a third zero resistor R30, a third second resistor R32, and a second eighth pull-up resistor R28; The anode of the fifth rectifier diode D5 is connected to the adapter power input of the industrial computer, the cathode of the fifth rectifier diode D5 is connected to the first end of the third zero resistor R30, the second end of the third zero resistor R30 is respectively connected to the inverting input end of the comparator U6A and the first end of the third second resistor R32; the second end of the third second resistor R32 is grounded; The non-inverting input terminal of the comparator U6A is connected to the set power supply voltage, the output terminal of the comparator U6A is connected to the second end of the second eight-pull-up resistor R28 and the input terminal of the main control circuit, and the first end of the second eight-pull-up resistor R28 is connected to the set power supply voltage.

7. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The battery voltage detection circuit includes a follower amplifier U5B, a second fifth resistor R25, and a second sixth resistor R26; the first end of the second fifth resistor R25 is connected to the battery module voltage, the second end of the second fifth resistor R25 is respectively connected to the first end of the second sixth resistor R26 and the non-inverting input end of the follower amplifier U5B, and the output end of the follower amplifier U5B is respectively connected to the inverting input end of the follower amplifier U5B and the input end of the main control circuit; the second end of the second sixth resistor R26 is grounded.

8. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The industrial computer current detection circuit includes a common-phase amplifier U5A, a first eight-amplification resistor R18, a first nine-amplification resistor R19, and a ninth zero sampling resistor R90; The non-inverting input terminal of the in-phase amplifier U5A is connected to the second end of the ninth zero sampling resistor R90, and the first end of the ninth zero sampling resistor R90 is grounded; The inverting input terminal of the common-mode amplifier U5A is respectively connected to the first terminal of the first eight-amplification resistor R18 and the second terminal of the first nine-amplification resistor R19; the output terminal of the common-mode amplifier U5A is connected to the second terminal of the first eight-amplification resistor R18 and the input terminal of the main control circuit; the first terminal of the first nine-amplification resistor R19 is grounded.

9. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The automatic switching module circuit includes a fourth current limiting resistor R4, a second zero current limiting resistor R20, a first second rectifier diode D12, a second third rectifier diode D23, a third switch MOS tube Q3, a second energy storage capacitor C2, and a fifth energy storage capacitor C5; the S stage of the switch MOS tube Q3 is connected to the D12_battery input after the battery is boosted, the D stage is connected to the first end of the rectifier diode D12, the G stage is connected to the second end of the current limiting resistor R20, the first end of the current limiting resistor R20 is connected to the power adapter P12V input, the first end of the current limiting resistor R4 is grounded, the second stage is connected to the power adapter P12V input, and the second end of the rectifier diode D12 is connected to the D12V output , the first end of the rectifier diode D23 is connected to the P12V input of the power adapter, and the second end is connected to the D12V output; the first ends of the energy storage capacitors C2 and C5 are connected to the D12V output, and the second ends are grounded. When P12V has an input, the switch MOS tube Q3 is turned off, and D12V is provided by P12V flowing through the rectifier diode D23. When P12V is suddenly disconnected, the switch MOS tube Q3 is turned on, and D12V is provided by the D12_battery input flowing through the switch MOS tube Q3 and the rectifier diode D12, and there will be no phenomenon of P12V backflowing into D12_battery and no phenomenon of P12V priority changing due to the voltage difference between P12V and D12_battery; The battery control module circuit includes a third eight-voltage-dividing resistor R38, a fourth two-voltage-dividing resistor R42, a fourth four-current-limiting resistor R44, a sixth switch MOS tube Q6, and an eighth switch MOS tube Q8; the S stage of the switch MOS tube Q6 is connected to the battery input B8.4V, the D stage is connected to the DO_B8.4V output, the G stage is connected to the second end of the current-limiting resistor R38, the first end of the current-limiting resistor R38 is connected to the battery B8.4V input, the first end of the current-limiting resistor R42 is connected to the G stage of the switch MOS tube Q6, the second stage is connected to the S stage of the switch MOS tube Q8, and the switch M The D level of OS tube Q8 is grounded, and the G level is connected to the microcontroller control pin MCU_DO_B8.4V. The first end of the current limiting resistor R44 is connected to the microcontroller control pin MCU_DO_B8.4V, and the second end is grounded. When the industrial computer adapter power supply P12V is connected, the microcontroller starts, controls the switch MOS tube Q8 to be turned on, thereby turning on the switch MOS tube Q6, and DO_B8.4V has an output. When the external power is cut off and the industrial computer is detected to be shut down normally, the microcontroller switch MOS tube Q8 is turned off, thereby turning off the switch MOS tube Q6, and the entire system is powered off.

10. The power-off protection circuit system for an industrial computer according to claim 1, characterized in that: The battery voltage detection module is connected to the battery module to measure the voltage of the battery module, and record each shutdown time and the degree of battery voltage drop. Combined with the current detection of the industrial computer, a mathematical model is established to calculate the battery capacity, analyze the power consumption required for the load to complete the shutdown action, predict the time and number of times the battery can be used normally, and give an early warning to replace the battery. When the battery power is insufficient to support the normal shutdown process, data can be saved and the hard disk can be turned off first; The industrial computer power-off protection circuit system includes a battery usage time estimation model construction module, which is used to construct a battery usage time estimation model; obtain the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, battery usage status data, and battery usage time data from historical data, and learn the calculation method of the battery remaining usage time data based on the distribution of battery voltage at different usage times, industrial computer battery working condition data, industrial computer current data, and battery usage status data obtained from the historical data to form a battery usage time estimation model.

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