CN114898783A - Shipborne mechanical hard disk protection device and protection circuit and method thereof - Google Patents
Shipborne mechanical hard disk protection device and protection circuit and method thereof Download PDFInfo
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- CN114898783A CN114898783A CN202210603855.8A CN202210603855A CN114898783A CN 114898783 A CN114898783 A CN 114898783A CN 202210603855 A CN202210603855 A CN 202210603855A CN 114898783 A CN114898783 A CN 114898783A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000002955 isolation Methods 0.000 claims description 46
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000005070 sampling Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 3
- 101150102866 adc1 gene Proteins 0.000 description 3
- 101150042711 adc2 gene Proteins 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/08—Insulation or absorption of undesired vibrations or sounds
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/04—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon modified to store record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/141—Battery and back-up supplies
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/143—Detection of memory cassette insertion or removal; Continuity checks of supply or ground lines; Detection of supply variations, interruptions or levels ; Switching between alternative supplies
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/147—Voltage reference generators, voltage or current regulators; Internally lowered supply levels; Compensation for voltage drops
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention discloses a ship-borne mechanical hard disk protection device and a protection circuit and method thereof, wherein the ship-borne mechanical hard disk protection device comprises: the invention provides reaction force in the moving direction of the hard disk fixing plate through the first damping device and the second damping device, so that the hard disk vibration is buffered, and the effect of physical buffering and damping is achieved on the mechanical design.
Description
Technical Field
The invention relates to the technical field of ship-borne mechanical hard disk protection, in particular to a ship-borne mechanical hard disk protection device and a protection circuit and method thereof.
Background
In recent years, with the increase of the demand of digital media and the improvement of the product functionality, the requirements for the space for data storage and the data reading speed have been greatly increased. Mechanical hard disks are one of the choices after considering cost and performance.
Conventional mechanical hard disks do not provide a complete protection measure. Because the environment on the ship is not in a static state as in the indoor environment but in a long-time bumping state, the mechanical hard disk does not have shockproof measures and vibration has great influence on the mechanical hard disk, the physical and structural damage of the hard disk can be caused by impact on the hard disk, so that data stored in the hard disk is destroyed, the power supply on the ship is unstable, adverse conditions such as sudden power failure and the like can occur, and the hard disk data loss or the damage of the whole hard disk can be caused by forced power failure.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a protection device, a protection circuit and a protection method for a ship-mounted mechanical hard disk, so as to protect the ship-mounted mechanical hard disk.
To achieve the above and other objects, the present invention provides a protection device for a hard disk of a ship-borne machine, comprising: hard disk (1) and hard disk fixed plate (2), hard disk (1) are fixed in on hard disk fixed plate (2), hard disk fixed plate (2) are equipped with a plurality of mounting holes (6), through mounting hole (6) utilize fixing device (7) in fixed first damping device (4) and second damping device (5) respectively in the upper and lower place of hard disk fixed plate (2).
Optionally, the mounting holes (6) are formed in the hard disk fixing plate (2) to fix the periphery of the hard disk (1).
Optionally, the first damping device (4) and the second damping device (5) are both elastic devices.
Optionally, the fixing device (7) is a limit screw.
In order to achieve the above object, the present invention further provides a protection circuit for a ship-borne mechanical hard disk protection device, for protecting the hard disk, including:
the main power supply module is used for converting high voltage of an external power supply into required stable high voltage, stable low voltage and power supply voltage required by the MCU;
the power supply detection circuit is used for converting the stable high voltage into a first differential sampling voltage and a second differential sampling voltage which accord with the MCU standard;
the power supply selection circuit is used for completing selection of the stable low voltage and the second power supply;
the second power supply is an internal power supply and is used for supplying power for emergency when the external power supply stops;
and the MCU control circuit is used for converting the first differential sampling voltage and the second differential sampling voltage output by the power supply detection circuit into digital voltages and judging whether corresponding external voltages exist and are stable, when the external voltages are stable, the MCU control circuit allows normal reading and writing in of the hard disk, and when the external voltages are unstable or stop, the MCU control circuit stops and writes in the hard disk.
Optionally, the power supply detection circuit divides the input voltage, and then outputs the first differential sampling voltage and the second differential sampling voltage to the MCU by using a differential isolation amplifier (U5) to isolate and amplify, so as to prevent the front-stage power supply from damaging the rear-stage circuit.
Optionally, the power detection circuit includes a first current-limiting protection resistor (R22), a first voltage-dividing resistor (R23), a second voltage-dividing resistor (R27), a second current-limiting protection resistor (R24), a spur filtering capacitor (C29), a differential matching resistor (R28), a protection diode (D7), a first filtering capacitor (C28), a second filtering capacitor (C27), a first isolation resistor (R25), a second isolation resistor (R26), and a differential isolation amplifier (U5), the stable high voltage is connected to one ends of the first current-limiting protection resistor (R22) and the first voltage-dividing resistor (R23), the other end of the first voltage-dividing resistor (R23) is connected to one end of the second voltage-dividing resistor (R27) and one end of the second current-limiting protection resistor (R24), the other end of the second current-limiting protection resistor (R24) is connected to one end of the spur filtering capacitor (C29) and an in-phase input end of the differential isolation amplifier (U5), the other end of the burr filtering capacitor (C29) is connected with one end of a differential matching resistor (R28) and the inverting input end of a differential isolation amplifier (U5), and the other end of a first current-limiting protection resistor (R22) is connected with the cathode of a protection diode (D7), one end of a first filtering capacitor (C28) and the first power supply input end of the differential isolation amplifier (U5); the MCU power supply voltage is connected to one end of a second filter capacitor (C27) and a second power supply input of a differential isolation amplifier (U5), a non-inverting differential output end of the differential isolation amplifier (U5) is connected to one end of a first isolation resistor (R25), the other end of the first isolation resistor (R25), namely a first differential sampling voltage, is connected to the MCU control circuit, an inverting differential output end of the differential isolation amplifier (U5) is connected to one end of a second isolation resistor (R26), and the other end of the second isolation resistor (R26), namely a second differential sampling voltage, is connected to the MCU control circuit.
Optionally, the second power supply is a rechargeable battery, and the power supply selection circuit is further configured to manage charging and discharging of the rechargeable battery.
In order to achieve the above object, the present invention further provides a method for protecting a ship-borne mechanical hard disk protection device, comprising the following steps:
step S1, reading the voltage value of the external power supply through the analog conversion interface;
in step S2, if the external power supply voltage is stable, normal reading and writing to the hard disk is allowed, and if the external power supply voltage is unstable or stops, the hard disk is stopped and written.
Optionally, step S2 further includes:
step S200, if the voltage of the external power supply is stable, reading and writing the hard disk normally;
step S201, if the external power supply voltage is unstable, further judging whether the external power supply voltage stops;
step S203, if the voltage of the external power supply stops, a second power supply is selected to supply power through the power supply selection circuit, and the hard disk writing and reading are stopped; and if the external power supply voltage is not stopped, the external power supply voltage is kept to supply power, and the hard disk writing and reading are stopped.
Compared with the prior art, the ship-mounted mechanical hard disk protection device, the protection circuit and the protection method thereof have the advantages that the installation holes (6) are formed in the hard disk fixing plate (2), the first damping device (4) and the second damping device (5) are respectively fixed above and below the hard disk fixing plate (2) through the installation holes (6) by the fixing devices (7) to provide a reaction force in the movement direction of the hard disk fixing plate, so that vibration is buffered, the effect of physical buffering and damping is achieved on mechanical design, and meanwhile, the protection of a mechanical hard disk is further achieved through the protection circuit and the protection method.
Drawings
FIG. 1 is a schematic structural diagram of a hard disk protection device of a shipborne machine according to the present invention;
FIG. 2 is a circuit diagram of a protection circuit of the protection device for the hard disk of the ship-borne machine according to the present invention;
FIG. 3 is a schematic circuit diagram of a power detection circuit according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a power selection circuit according to an embodiment of the present invention;
FIG. 5 is a flow chart illustrating steps of a method for protecting a hard disk of a shipborne machine according to the present invention;
FIG. 6 is a flow chart of hard disk read/write according to an embodiment of the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Fig. 1 is a schematic structural diagram of a shipborne mechanical hard disk protection device according to the present invention. As shown in fig. 1, the present invention provides a protection device for a hard disk of a ship-borne machine, including: a hard disk 1 and a hard disk fixing plate 2.
The hard disk 1 is provided with hard disk fixing parts, such as hard disk fixing screws, corresponding to the hard disk fixing parts of the hard disk 1, and the hard disk fixing plate 2 is provided with corresponding hard disk fixing holes 3, generally speaking, the hard disk fixing holes are provided with a plurality of hard disk fixing holes so as to fix the hard disk on the hard disk fixing plate 2 through the hard disk fixing screws, the area of the hard disk fixing plate 2 should be slightly larger than that of the hard disk 1 so that the hard disk 1 can be completely accommodated on the hard disk fixing plate 2, and preferably, the hard disk 1 is accommodated in the middle of the hard disk fixing plate 2 so that the edge of the hard disk fixing plate 2 has space for fixing.
In the embodiment of the present invention, the hard disk fixing plate 2 is provided with a plurality of mounting holes 6, and a fixing device 7 is used to fix a first damping device 4 and a second damping device 5 above and below the hard disk fixing plate 2 through the mounting holes, wherein the first damping device 4 and the second damping device 5 are springs, and the fixing device 7 is a limit screw, i.e. the limit screw fixes the spring as the first damping device 4 and the spring as the second damping device 5 on the hard disk fixing plate 2 through the mounting holes 6, optionally, in the embodiment of the present invention, the hard disk fixing plate 2 is provided with mounting holes 6 around, the upper side and the lower side of each mounting hole 6 are respectively provided with a spring and fixed on the hard disk fixing plate through the limit screw, so as to provide a reaction force in the moving direction of the hard disk fixing plate 2, therefore, the vibration amplitude of the hard disk fixing plate, namely the mechanical hard disk, is reduced.
In the concrete application, when the mechanical hard disk 1 is connected with equipment, firstly, the hard disk 1 is fixed on a customized hard disk fixing plate 2 through a hard disk fixing screw hole 3 (the hard disk fixing screw hole is a small mounting hole in the middle of the hard disk fixing plate 2) by a hard disk fixing screw (the hard disk is provided with a self-contained hard disk), then a lower spring is respectively arranged below mounting holes 6 around the hard disk fixing plate 2, then an upper spring is respectively arranged above the lower spring, and the upper spring is fixed by a limiting screw and is fixed on the equipment.
Fig. 2 is a circuit configuration diagram of a protection circuit of the onboard mechanical hard disk protection device according to the present invention. As shown in fig. 2, the protection circuit of the onboard mechanical hard disk protection device of the present invention includes: the power supply circuit comprises a main power supply module 10, a power supply detection circuit 20, a power supply selection circuit 30, a second power supply 40, an MCU control circuit 50 and a hard disk 60, wherein the hard disk 60 is a load of the invention.
The main power module 10 is composed of an external power supply and a linear voltage reduction circuit, and is used for converting external high-voltage into stable high voltage such as +24V, stable low voltage +5V and power supply voltage +3.3V required by the MCU;
the power supply detection circuit 20 is composed of a first current-limiting protection resistor R22, a first voltage-dividing resistor R23, a second voltage-dividing resistor R27, a second current-limiting protection resistor R24, a burr filtering capacitor C29, a differential matching resistor R28, a protection diode D7, a first filtering capacitor C28, a second filtering capacitor C27, a first isolation resistor R25, a second isolation resistor R26 and a differential isolation amplifier U5 (AMC 1200), and is used for converting external stable high voltage +24V into differential sampling voltage ADC1 and ADC2 which meet the MCU standard;
the power supply selection circuit 30 consists of a battery socket J1, a third filter capacitor C4, an energy storage inductor L1, a charging indicator lamp D1, a discharging indicator lamp D2, an illuminating lamp D8, a third isolation resistor R33, a switch burr elimination resistor R2, a switch burr elimination capacitor C5, a fourth filter capacitor C88 and a power supply selection chip U2 (TP 4333), and is used for completing selection of stable low voltage +5V and battery voltage and completing charge and discharge management of a battery;
a second power source 40, in the embodiment of the present invention, the second power source 40 is a rechargeable battery, and is used for providing emergency power to the equipment when the external power source is stopped;
the MCU control circuit 50, which is composed of a microprocessor MCU and its peripheral circuits, is used to convert the differential sampling voltages ADC1 and ADC2 outputted from the power detection circuit 20 into digital voltages and determine whether the corresponding external voltages exist and are stable, when the external voltages are stable, allow normal reading and writing into the hard disk, and when the external voltages are unstable or stop, stop and write into the hard disk.
External voltage is connected to external power source's input, external power source output's stable high voltage is if +24V is connected to power detection circuit 20's input and linear step-down circuit's input, power detection circuit 20's output is connected to MCU control circuit 50's ADC input, linear step-down circuit's output +5V is connected to power selection circuit 30's main power input, second power 40 connects power selection circuit 30's stand-by power input, power selection circuit 30's power output +5V _ SATA, power selection circuit 30's electric quantity output IO1 is connected to MCU control circuit 50's electric quantity input, MCU control circuit 50 passes through data line both way junction with hard disk 60.
Because the input voltage is greater than the highest input voltage of the single chip microcomputer and the input power supply is unstable, the power supply detection circuit 20 divides the input voltage, and then adopts a differential isolation amplifier U5 (AMC 1200) to isolate, amplify and output a differential signal to be connected with the MCU, thereby ensuring that a front-stage power supply cannot damage a rear-stage circuit. As shown in fig. 3, the stabilized high voltage +24V is connected to one end of a first current-limiting protection resistor R22 and a first voltage-dividing resistor R23, the other end of the first voltage-dividing resistor R23 is connected to one end of a second voltage-dividing resistor R27 and one end of a second current-limiting protection resistor R24, the other end of the second current-limiting protection resistor R24 is connected to one end of a glitch-filtering capacitor C29 and a non-inverting input VINP of a differential isolation amplifier U5 (AMC 1200), the other end of the glitch-filtering capacitor C29 is connected to one end of a differential matching resistor R28 and an inverting input VINN of the differential isolation amplifier U5 (AMC 1200), and the other end of the first current-limiting protection resistor R22 is connected to a cathode of a protection diode D7, one end of the first filtering capacitor C28 and a first power supply input 1 of the differential isolation amplifier U5 (1200); the MCU power voltage +3.3V is connected to one end of the second filter capacitor C27 and the second power input VDD2 of the differential isolation amplifier U5 (AMC 1200), the in-phase differential output VOUTP of the differential isolation amplifier U5 (AMC 1200) is connected to one end of the first isolation resistor R25, the other end of the first isolation resistor R25, i.e., the differential sampling voltage ADC1, is connected to the in-phase ADC input of the MCU control circuit 50, the inverted differential output VOUTN of the differential isolation amplifier U5 (AMC 1200) is connected to one end of the second isolation resistor R26, and the other end of the second isolation resistor R26, i.e., the differential sampling voltage ADC2, is connected to the inverted ADC input of the MCU control circuit 50; the other end of the second voltage-dividing resistor R27, the other end of the differential matching resistor R28, the anode of the protection diode D7, the other end of the first filter capacitor C28, the other end of the second filter capacitor C27 and the power supply negative terminal GND of the differential isolation amplifier U5 (AMC 1200) are grounded.
Fig. 4 is a schematic circuit diagram of a power selection circuit according to an embodiment of the invention. Specifically, the positive terminal pin 1 of the battery socket J1, one end of the third filter capacitor C4, one end of an energy storage inductor L1 is connected to a battery input end of a power selection chip U2 (TP 4333) to form a standby power input end of the power selection circuit 30, one end of a switch burr eliminating resistor R2 and a power input end VDD of the power selection chip U2 (TP 4333) form a main power input end of the power selection circuit 30, one end of an energy storage inductor L1 is connected to a switch input end SW of the power selection chip U2 (TP 4333), a charge indication output end LED1 of the power selection chip U2 (TP 4333) is connected to an anode of a charge indicator LED1, a discharge indication output end LED2 of the power selection chip U2 (TP 4333) is connected to an anode of a discharge indicator LED2, an electric quantity output end SWT of the power selection chip U2 (TP 4333) is connected to an anode of an illumination lamp D8 and one end of a third isolation resistor R33, and the other end of the third isolation resistor R33 is an electric quantity output end IO1 of the power selection circuit 30; the other end of the switch glitch elimination resistor R2 is connected with one end of a switch glitch elimination capacitor C5, and a power output end OUT of a power selection chip U2 (TP 4333) is connected with one end of a fourth filter capacitor C88 to form a power output end +5V _ SATA of the power selection circuit 30; the negative terminal 2 pin of the battery socket J1, the other end of the third filter capacitor C4, the cathode of the charge indicator LED1, the cathode of the discharge indicator LED2, the cathode of the illuminating lamp D8, the other end of the switch burr eliminating capacitor C5 and the power supply negative terminal GND of the power supply selection chip U2 (TP 4333) are grounded.
Fig. 5 is a flowchart illustrating steps of a method for protecting a hard disk protection device of a shipborne machine according to the present invention. As shown in fig. 5, the method for protecting a hard disk protection device of a shipborne machine of the present invention includes the following steps:
step S1, reading the voltage value of the external power supply through the analog conversion interface;
in step S2, if the external power supply voltage is stable, normal reading and writing to the hard disk is allowed, and if the external power supply voltage is unstable or stops, the hard disk is stopped and written.
In an embodiment of the present invention, step S2 further includes:
step S200, if the voltage of the external power supply is stable, reading and writing the hard disk normally;
step S201, if the external power supply voltage is unstable, further judging whether the external power supply voltage stops;
step S203, if the voltage of the external power supply stops, a second power supply is selected to supply power through the power supply selection circuit, and the hard disk writing and reading are stopped; and if the external power supply voltage is not stopped, the external power supply voltage is kept to supply power, and the hard disk writing and reading are stopped.
FIG. 6 is a flow chart of hard disk read/write according to an embodiment of the present invention. In the embodiment of the invention, the hard disk read-write flow is as follows:
first, in case the external power supply is stable: firstly, a power supply selection circuit supplies power by using an external power supply; the battery is not charged when the battery is in a sufficient state, and the battery is charged when the battery is in an insufficient state; and thirdly, the power supply detection circuit converts external high voltage into low voltage and transmits the low voltage to the MCU, and the MCU judges that the external power supply is stable and the hard disk data is normally read and written.
Then, in case the external power supply is unstable: firstly, a power supply selection circuit supplies power by using an external power supply; the battery is not charged when the battery is in a sufficient state, and the battery is charged when the battery is in an insufficient state; and thirdly, the power supply detection circuit converts external high voltage into low voltage and transmits the low voltage to the MCU, the MCU judges that the external power supply is unstable, and the hard disk data stops reading and writing.
And finally, the external power supply suddenly stops supplying power: firstly, a power supply selection circuit uses an internal battery to supply power; the battery starts to discharge, the power detection circuit detects that the external power supply stops supplying power, and the hard disk data stops reading and writing.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be as set forth in the claims.
Claims (10)
1. A protection device for a hard disk of a ship-borne machine, comprising: hard disk (1) and hard disk fixed plate (2), hard disk (1) are fixed in on hard disk fixed plate (2), hard disk fixed plate (2) are equipped with a plurality of mounting holes (6), through mounting hole (6) utilize fixing device (7) in fixed first damping device (4) and second damping device (5) respectively in the upper and lower place of hard disk fixed plate (2).
2. The device for protecting a hard disk of a ship-borne machine according to claim 1, wherein the mounting holes (6) are formed in the periphery of the hard disk fixing plate (2) outside the hard disk (1).
3. The on-board mechanical hard disk protection device of claim 1, wherein: the first damping device (4) and the second damping device (5) are elastic devices.
4. The on-board mechanical hard disk protection device of claim 3, wherein: the fixing device (7) is a limiting screw.
5. A protection circuit of an onboard mechanical hard disk protection device for protecting the hard disk of claim 1, comprising:
the main power supply module is used for converting high voltage of an external power supply into required stable high voltage, stable low voltage and power supply voltage required by the MCU;
the power supply detection circuit is used for converting the stable high voltage into a first differential sampling voltage and a second differential sampling voltage which accord with the MCU standard;
the power supply selection circuit is used for completing selection of the stable low voltage and the second power supply;
the second power supply is an internal power supply and is used for supplying power for emergency when the external power supply stops;
and the MCU control circuit is used for converting the first differential sampling voltage and the second differential sampling voltage output by the power supply detection circuit into digital voltages and judging whether corresponding external voltages exist and are stable, when the external voltages are stable, the MCU control circuit allows normal reading and writing in of the hard disk, and when the external voltages are unstable or stop, the MCU control circuit stops and writes in the hard disk.
6. The protection circuit of claim 5, wherein the protection circuit comprises: the power supply detection circuit divides the input voltage firstly, and then adopts a differential isolation amplifier (U5) to isolate, amplify and output the first differential sampling voltage and the second differential sampling voltage to the MCU, so that the preceding stage power supply is prevented from damaging a subsequent stage circuit.
7. The protection circuit of claim 6, wherein the protection circuit comprises: the power supply detection circuit comprises a first current-limiting protection resistor (R22), a first voltage-dividing resistor (R23), a second voltage-dividing resistor (R27), a second current-limiting protection resistor (R24), a burr filtering capacitor (C29), a differential matching resistor (R28), a protection diode (D7), a first filtering capacitor (C28), a second filtering capacitor (C27), a first isolation resistor (R25), a second isolation resistor (R26) and a differential isolation amplifier (U5), wherein the stable high voltage is connected to one ends of the first current-limiting protection resistor (R22) and the first voltage-dividing resistor (R23), the other end of the first voltage-dividing resistor (R23) is connected to one end of the second voltage-dividing resistor (R27) and one end of the second current-limiting protection resistor (R24), the other end of the second current-limiting protection resistor (R24) is connected to one end of the burr filtering capacitor (C29) and the non-phase input end of the differential isolation amplifier (U5), the other end of the burr filtering capacitor (C29) is connected with one end of a differential matching resistor (R28) and the inverting input end of a differential isolation amplifier (U5), and the other end of a first current-limiting protection resistor (R22) is connected with the cathode of a protection diode (D7), one end of a first filtering capacitor (C28) and the first power supply input end of the differential isolation amplifier (U5); the MCU power supply voltage is connected to one end of a second filter capacitor (C27) and a second power supply input of a differential isolation amplifier (U5), a non-inverting differential output end of the differential isolation amplifier (U5) is connected to one end of a first isolation resistor (R25), the other end of the first isolation resistor (R25), namely a first differential sampling voltage, is connected to the MCU control circuit, an inverting differential output end of the differential isolation amplifier (U5) is connected to one end of a second isolation resistor (R26), and the other end of the second isolation resistor (R26), namely a second differential sampling voltage, is connected to the MCU control circuit.
8. The protection circuit of claim 7, wherein the protection circuit comprises: the second power supply is a rechargeable battery, and the power supply selection circuit is also used for charging and discharging management of the rechargeable battery.
9. A protection method of a ship-borne mechanical hard disk protection device comprises the following steps:
step S1, reading the voltage value of the external power supply through the analog conversion interface;
in step S2, if the external power supply voltage is stable, normal reading and writing to the hard disk is allowed, and if the external power supply voltage is unstable or stops, the hard disk is stopped and written.
10. The method as claimed in claim 9, wherein the step S2 further comprises:
step S200, if the voltage of the external power supply is stable, reading and writing the hard disk normally;
step S201, if the external power supply voltage is unstable, further judging whether the external power supply voltage stops;
step S203, if the voltage of the external power supply stops, a second power supply is selected to supply power through the power supply selection circuit, and the hard disk writing and reading are stopped; and if the external power supply voltage is not stopped, the external power supply voltage is kept to supply power, and the hard disk writing and reading are stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210603855.8A CN114898783A (en) | 2022-05-31 | 2022-05-31 | Shipborne mechanical hard disk protection device and protection circuit and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210603855.8A CN114898783A (en) | 2022-05-31 | 2022-05-31 | Shipborne mechanical hard disk protection device and protection circuit and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114898783A true CN114898783A (en) | 2022-08-12 |
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| CN202210603855.8A Pending CN114898783A (en) | 2022-05-31 | 2022-05-31 | Shipborne mechanical hard disk protection device and protection circuit and method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203366741U (en) * | 2013-07-19 | 2013-12-25 | 安徽富煌和利时科技有限公司 | A vehicle-mounted hard disk damping device |
| CN206619392U (en) * | 2017-03-19 | 2017-11-07 | 申圣兵 | Hard disc of computer damping device |
| CN207503642U (en) * | 2017-11-20 | 2018-06-15 | 刘江 | A kind of mechanical hard disk vibration-damping radiating box |
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2022
- 2022-05-31 CN CN202210603855.8A patent/CN114898783A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203366741U (en) * | 2013-07-19 | 2013-12-25 | 安徽富煌和利时科技有限公司 | A vehicle-mounted hard disk damping device |
| CN206619392U (en) * | 2017-03-19 | 2017-11-07 | 申圣兵 | Hard disc of computer damping device |
| CN207503642U (en) * | 2017-11-20 | 2018-06-15 | 刘江 | A kind of mechanical hard disk vibration-damping radiating box |
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Application publication date: 20220812 |