Hard disk drive module and corresponding vehicle-mounted equipment integrated machine

Abstract

This invention provides a hard disk drive module, comprising a mechanical hard disk drive circuit, a temperature detection circuit, an acceleration detection circuit, a fan drive circuit, a heating element drive circuit, a control chip, and a NOR non-volatile memory; wherein the mechanical hard disk drive circuit includes a protection sub-circuit, a current detection sub-circuit, and a drive sub-circuit. This invention also provides an integrated vehicle-mounted device. The hard disk drive module and the integrated vehicle-mounted device of this invention can effectively monitor the working environment of the mechanical hard disk, improving the effectiveness of the mechanical hard disk and extending its service life in vehicle-mounted devices.

Description

Technical Field

[0001] This invention relates to the field of circuits, and in particular to a hard disk drive circuit and a corresponding integrated vehicle-mounted device. Background Technology

[0002] With the advancement of technology, the automotive industry is becoming increasingly intelligent, making hard disk drives (HDDs) and non-volatile memory (NOR) memory increasingly important for in-vehicle devices used to record vehicle status. HDDs offer relatively high cost-effectiveness, but they are sensitive to vibration and extreme temperatures, making them prone to damage when recording data in poor vehicle conditions.

[0003] Therefore, it is necessary to develop a hard disk drive circuit and a corresponding in-vehicle device integrated unit to improve the service life of the mechanical hard disk in the in-vehicle device. Summary of the Invention

[0004] This invention provides a hard drive driver module with temperature detection, acceleration detection, and overcurrent detection compatible with different mechanical hard drives, as well as a corresponding in-vehicle device integrated unit, to solve the technical problem of the short service life of existing mechanical hard drives in in-vehicle devices.

[0005] This invention provides a hard disk drive module, comprising:

[0006] The hard disk drive circuit is used to supply power to the corresponding hard disk drive.

[0007] A temperature detection circuit is used to detect the operating temperature of the hard disk drive;

[0008] An acceleration detection circuit is used to detect the three-axis acceleration of the hard disk drive;

[0009] Fan drive circuit, used to start the cooling fan;

[0010] Heating element drive circuit, used to start the heating element module;

[0011] The control chip is connected to the hard disk drive circuit, the temperature detection circuit, the acceleration detection circuit, the fan drive circuit, and the heating element drive circuit, respectively, and provides control signals to the above circuits; and

[0012] A NOR non-volatile memory is connected to the control chip and used to store the control parameters of the control chip;

[0013] The mechanical hard disk drive circuit includes:

[0014] The protection sub-circuit is used for overvoltage and reverse connection protection of the input signal;

[0015] A current sensing circuit is used to perform overcurrent detection on the input signal based on the current sensing resistor in the hard disk drive circuit; and

[0016] The starter circuit is used to receive signals from the control chip and control the input signals to the hard disk drive.

[0017] In the hard disk drive module of the present invention, the current detection sub-circuit includes:

[0018] Differential current detection unit is used to generate detection voltage;

[0019] An overcurrent detection comparison unit is used to generate a current detection interruption signal based on a preset reference voltage and the detection voltage.

[0020] In the hard disk drive module of the present invention, the current detection sub-circuit further includes:

[0021] The reference voltage selection unit is used to set a corresponding preset reference voltage based on the reference voltage setting signal of the control chip.

[0022] In the hard disk drive module of the present invention, the differential current detection unit includes a first operational amplifier and a second operational amplifier; the overcurrent detection comparison unit includes a comparator; and the reference voltage selection unit is a multi-to-one analog switch chip.

[0023] The first input terminal of the first operational amplifier is connected to one end of the current sensing resistor, the second input terminal of the first operational amplifier is connected to the other end of the current sensing resistor, the output terminal of the first operational amplifier is connected to the first input terminal of the second operational amplifier, the second input terminal of the second operational amplifier is grounded through a voltage divider resistor, the output terminal of the second operational amplifier is connected to the first input terminal of the comparator, the second input terminal of the comparator is connected to the output pin of the multi-select analog switch chip, and the output terminal of the comparator is connected to the interrupt pin of the control chip.

[0024] The multi-select analog switch chip includes multiple setting pins, multiple input pins, and one output pin. The multiple setting pins are connected to the control chip, and different input pins are connected to different voltage divider resistors so that different comparison voltages are input to the second input terminal of the comparator.

[0025] In the hard disk drive module of the present invention, the protection sub-circuit includes a Zener diode, a first protection switch, and a second protection switch. The positive terminal of the Zener diode is grounded, and the negative terminal of the Zener diode is connected to the input terminal of the protection sub-circuit through a current-limiting resistor. The control terminal of the first protection switch is connected to the negative terminal of the Zener diode. The first connection terminal of the first protection switch is connected to the input terminal of the protection sub-circuit. The second connection terminal of the first protection switch is connected to the control terminal of the second protection switch. The first connection terminal of the second protection switch is connected to the output terminal of the protection sub-circuit, and the second connection terminal of the second protection switch is connected to the first connection terminal of the first protection switch.

[0026] In the hard disk drive module of the present invention, the startup sub-circuit includes a soft-start capacitor, a first soft-start switch transistor, and a second soft-start switch transistor. The first connection terminal of the first soft-start switch transistor is connected to the input terminal of the current detection sub-circuit, the second connection terminal of the first soft-start switch transistor is connected to the output terminal of the current detection sub-circuit, the control terminal of the first soft-start switch transistor is connected to the first connection terminal of the second soft-start switch transistor, the second connection terminal of the second soft-start switch transistor is grounded, and the control terminal of the second soft-start switch transistor is connected to the control chip.

[0027] In the hard disk drive module of the present invention, the heating element drive circuit includes a first heating switch tube and a second heating switch tube. The first connection terminal of the first heating switch tube is connected to the power supply, the second connection terminal of the first heating switch tube is connected to the heating element, the control terminal of the first heating switch tube is connected to the first connection terminal of the second heating switch tube, the second connection terminal of the second heating switch tube is grounded, and the control terminal of the second heating switch tube is connected to the control chip.

[0028] The fan drive circuit includes a first heat dissipation switch tube and a second heat dissipation switch tube. The first connection terminal of the first heat dissipation switch tube is connected to the power supply, the second connection terminal of the first heat dissipation switch tube is connected to the fan, the control terminal of the first heat dissipation switch tube is connected to the first connection terminal of the second heat dissipation switch tube, the second connection terminal of the second heat dissipation switch tube is grounded, and the control terminal of the second heat dissipation switch tube is connected to the control chip.

[0029] The temperature detection circuit includes a third operational amplifier. The first input terminal of the third operational amplifier is connected to a thermistor disposed on the mechanical hard disk. The second input terminal of the third operational amplifier is grounded. The output terminal of the third operational amplifier is connected to the control chip.

[0030] The acceleration detection circuit includes a speed sensor for detecting acceleration in various directions of the hard disk drive, and the output of the speed sensor is connected to the control chip.

[0031] In the hard disk drive module of the present invention, the control chip includes a power supply pin, a ground pin, a drive circuit connection pin, an overcurrent detection connection pin, a temperature detection connection pin, an acceleration detection connection pin, a heating drive connection pin, a heat dissipation drive connection pin, a mechanical hard disk connection pin, and a memory connection pin.

[0032] The control chip is connected to the starter circuit via the drive circuit connection pin, to the current detector circuit via the overcurrent detection connection pin, to the temperature detection circuit via the temperature detection connection pin, to the acceleration detection circuit via the acceleration detection connection pin, to the heating element drive circuit via the heating drive connection pin, to the fan drive circuit via the heat dissipation drive connection pin, to the hard disk drive via the hard disk connection pin, and to the NOR non-volatile memory via the memory connection pin.

[0033] In the hard disk drive module described in this invention, the control chip is a microcontroller chip of model 32F103RCT6.

[0034] The present invention also provides an integrated vehicle-mounted device using the above-mentioned hard disk drive module.

[0035] Compared with the prior art, the beneficial effects of this invention are as follows: the hard disk drive module and the control chip of the in-vehicle device integrated machine of this invention can effectively detect the working environment of the mechanical hard disk. When the vehicle condition is normal, the mechanical hard disk is used to record vehicle data; when the vehicle condition is poor, the mechanical hard disk stops working, thereby improving the effectiveness of the mechanical hard disk and extending the service life of the mechanical hard disk of the in-vehicle device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0037] Figure 1 This is a structural block diagram of an embodiment of the hard disk drive module of the present invention;

[0038] Figure 2 A detailed circuit diagram of a mechanical hard disk circuit according to an embodiment of the hard disk drive module of the present invention;

[0039] Figure 3A detailed circuit diagram of the heating element driving circuit of an embodiment of the hard disk drive module of the present invention;

[0040] Figure 4 A detailed circuit diagram of the fan drive circuit in an embodiment of the hard disk drive module of the present invention;

[0041] Figure 5 A detailed circuit diagram of the temperature detection circuit in an embodiment of the hard disk drive module of the present invention;

[0042] Figure 6 The following is a detailed circuit diagram of the acceleration detection circuit in an embodiment of the hard disk drive module of the present invention.

[0043] Figure 7 A detailed circuit diagram of a NOR non-volatile memory, representing an embodiment of the hard disk drive module of the present invention;

[0044] Figure 8 This is a detailed circuit diagram of the control chip in an embodiment of the hard disk drive module of the present invention. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This invention provides a hard disk drive module, which is installed in a corresponding in-vehicle device. The control chip of this hard disk drive module can effectively detect the working environment of the hard disk; specifically, it can detect the temperature, acceleration, and overcurrent of the hard disk. When the vehicle is in normal condition, the hard disk can be used to record vehicle data and transfer storage contents; when the vehicle is in poor condition, the hard disk stops working, thus improving the effectiveness of the hard disk and extending its lifespan in the in-vehicle device.

[0047] Please refer to Figure 1 , Figure 1 This is a structural block diagram of an embodiment of the hard disk drive module of the present invention. The hard disk drive module 10 of this embodiment includes a mechanical hard disk drive circuit 11, a temperature detection circuit 12, an acceleration detection circuit 13, a fan drive circuit 14, a heating element drive circuit 15, a control chip 16, and a NOR non-volatile memory 17.

[0048] The hard disk drive circuit 11 is used to power the corresponding hard disk 18; the temperature detection circuit 12 is used to detect the operating temperature of the hard disk 18; the acceleration detection circuit 13 is used to detect the three-axis acceleration of the hard disk 18; the fan drive circuit 14 is used to start the cooling fan; the heating element drive circuit 15 is used to start the heating element module; the control chip 16 is connected to the hard disk drive circuit 11, the temperature detection circuit 12, the acceleration detection circuit 13, the fan drive circuit 14, and the heating element drive circuit 15 respectively, and provides control signals to the above circuits; the NOR non-volatile memory 17 can be connected to the control chip 16 via SPI, and is used to store the control parameters of the control chip 16.

[0049] Please refer to Figure 2 , Figure 2 The diagram shows a detailed circuit diagram of a mechanical hard drive circuit according to an embodiment of the hard drive driver module of the present invention.

[0050] The hard disk drive circuit 11 includes a filter sub-circuit 111, a protection sub-circuit 112, a current detection sub-circuit 113, and a startup sub-circuit 114. The filter sub-circuit 111 is used to filter the input signal; the protection sub-circuit 112 is used to provide overvoltage and reverse connection protection for the input signal; the current detection sub-circuit 113 is used to perform overcurrent detection on the input signal based on the current detection resistor R12 in the hard disk drive circuit 11; and the startup sub-circuit 114 is used to receive signals from the control chip 16 and control the input signal to the hard disk 18.

[0051] The filter sub-circuit 111 includes a Zener diode D11, a filter capacitor C11, and a filter inductor L11. The Zener diode D11 can effectively eliminate surge voltage, and the filter capacitor C11 and the filter inductor L11 can effectively filter the input signal.

[0052] The protection sub-circuit 112 includes a Zener diode D12, a first protection switch Q11, and a second protection switch Q12. The positive terminal of the Zener diode D12 is grounded, and the negative terminal of the Zener diode D12 is connected to the input terminal of the protection sub-circuit through a current-limiting resistor R11. The control terminal of the first protection switch Q11 is connected to the negative terminal of the Zener diode D12. The first connection terminal of the first protection switch Q11 is connected to the input terminal of the protection sub-circuit 112. The second connection terminal of the first protection switch Q11 is connected to the control terminal of the second protection switch Q12. The first connection terminal of the second protection switch Q12 is connected to the output terminal of the protection sub-circuit 112, and the second connection terminal of the second protection switch Q12 is connected to the first connection terminal of the first protection switch Q11. If the input signal voltage is too high, the Zener diode D12 will conduct directly to relieve the input signal voltage. If the hard disk drive circuit is reversed, the second protection switch Q12 will disconnect directly to prevent reverse voltage from affecting the normal operation of the hard disk drive circuit and the hard disk. Since both second protection switches Q12 have reverse-conducting body diodes, to ensure that no current flows through the second protection switches Q12 when the hard disk drive circuit is reversed, two reverse-connected second protection switches Q12 are connected in series. In this embodiment, the first protection switch Q11 is a PNP transistor of model BT3906, and the second protection switch Q12 is a P-channel MOS field-effect transistor of model AO3401A.

[0053] The current sensing sub-circuit 113 includes a differential current detection unit 1131, an overcurrent detection comparison unit 1132, and a reference voltage selection unit 1133. The differential current detection unit 1131 is used to generate a detection voltage; the overcurrent detection comparison unit 1132 is used to generate a current sensing interrupt signal based on a preset reference voltage and the detection voltage; the reference voltage selection unit 1133 is used to set a corresponding preset reference voltage based on the reference voltage setting signal of the control chip 16.

[0054] Specifically, the differential current detection unit 1131 includes a first operational amplifier U11 and a second operational amplifier U12; the overcurrent detection comparison unit 1132 includes a comparator U13; and the reference voltage selection unit 1133 is a multi-to-one analog switch chip U14. In this embodiment, the multi-to-one analog switch chip U14 is an eight-to-one analog switch of model 74HC4051.

[0055] The first input terminal of the first operational amplifier U11 is connected to one end of the current sensing resistor R12, the second input terminal of the first operational amplifier U11 is connected to the other end of the current sensing resistor R12, the output terminal of the first operational amplifier U11 is connected to the first input terminal of the second operational amplifier U12, the second input terminal of the second operational amplifier U12 is grounded through the voltage divider resistor R13, the output terminal of the second operational amplifier U12 is connected to the first input terminal of the comparator U13, the second input terminal of the comparator U13 is connected to the output pin Z of the multi-select analog switch chip U14, and the output terminal of the comparator U13 is connected to the interrupt pin of the control chip.

[0056] The multi-select analog switch chip U14 includes multiple setting pins A0, A1, A2, multiple input pins Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7, and one output pin Z. The multiple setting pins are connected to the control chip 16, and different input pins are connected to different voltage divider resistors so that different comparison voltages are input to the second input terminal of the comparator U13.

[0057] The starter circuit 114 includes a soft-start capacitor C12, a first soft-start switch Q13, and a second soft-start switch Q14. The first connection terminal of the first soft-start switch Q13 is connected to the input terminal of the current detector circuit 113, the second connection terminal of the first soft-start switch Q13 is connected to the output terminal of the current detector circuit 113, the control terminal of the first soft-start switch Q13 is connected to the first connection terminal of the second soft-start switch Q14, the second connection terminal of the second soft-start switch Q14 is grounded, and the control terminal of the second soft-start switch Q14 is connected to the control chip 16. In this embodiment, the second soft-start switch Q14 is an NPN transistor of model BT3904, and the first soft-start switch Q13 is a P-channel MOS field-effect transistor of model AO3401A.

[0058] Please refer to Figure 3 , Figure 3 This is a detailed circuit diagram of the heating element driving circuit in an embodiment of the hard disk drive module of the present invention.

[0059] The heating element driving circuit 15 includes a first heating switch Q51 and a second heating switch Q52. The first connection terminal of the first heating switch Q51 is connected to the power supply, and the second connection terminal of the first heating switch Q52 is connected to the heating element 51. The control terminal of the first heating switch Q51 is connected to the first connection terminal of the second heating switch Q52, and the second connection terminal of the second heating switch Q52 is grounded. The control terminal of the second heating switch Q52 is connected to the control chip 16. In this embodiment, the second heating switch Q52 is an NPN transistor of model BT3904, and the first heating switch Q51 is a P-channel MOS field-effect transistor of model AO3401A.

[0060] Please refer to Figure 4 , Figure 4 This is a detailed circuit diagram of the fan drive circuit in an embodiment of the hard disk drive module of the present invention.

[0061] The fan drive circuit 14 includes a first thermal switch Q41 and a second thermal switch Q42. The first terminal of the first thermal switch Q41 is connected to the power supply, and the second terminal of the first thermal switch Q41 is connected to the fan 41. The control terminal of the first thermal switch Q41 is connected to the first terminal of the second thermal switch Q42, and the second terminal of the second thermal switch Q42 is grounded. The control terminal of the second thermal switch Q42 is connected to the control chip 16. In this embodiment, the second thermal switch Q42 is an NPN transistor of model BT3904, and the first thermal switch Q41 is a P-channel MOS field-effect transistor of model AO3401A.

[0062] Please refer to Figure 5 , Figure 5 This is a detailed circuit diagram of the temperature detection circuit in an embodiment of the hard disk drive module of the present invention.

[0063] The temperature detection circuit 12 includes a third operational amplifier U21. The first input terminal of the third operational amplifier U21 is connected to the thermistor 21 disposed on the mechanical hard disk 18. The second input terminal of the third operational amplifier U21 is grounded. The output terminal of the third operational amplifier U21 is connected to the control chip 16.

[0064] Please refer to Figure 6 , Figure 6 This is a detailed circuit diagram of the acceleration detection circuit in an embodiment of the hard disk drive module of the present invention.

[0065] The acceleration detection circuit 13 includes a speed sensor for detecting acceleration in various directions of the hard disk drive. The speed sensor is model LSM6DS3TR-C, and its output is connected to the control chip 16 via IIC.

[0066] Please refer to Figure 7 , Figure 7 This is a detailed circuit diagram of a NOR non-volatile memory, which is an embodiment of the hard disk drive module of the present invention.

[0067] The NOR non-volatile memory 17 is used to store the control parameters of the control chip 16 and the temporary data of the hard disk. The model of the NOR non-volatile memory 17 is W25Q64. The output pin DO and the input pin DI of the NOR non-volatile memory 17 are respectively connected to the control chip 16.

[0068] Please refer to Figure 8 , Figure 8This is a detailed circuit diagram of the control chip in an embodiment of the hard disk drive module of the present invention.

[0069] The control chip 16 includes a power supply pin VDD, a ground pin VSS, a drive circuit connection pin PC12, an overcurrent detection connection pin PC1, a temperature detection connection pin PC2, acceleration detection connection pins PC10 and PA5, a heating drive connection pin PB4, a heat dissipation drive connection pin PB3, a mechanical hard disk connection pin PA10 and PA9, a memory connection pin PB0 and PB1, and overcurrent detection setting pins PC7, PC6, and PB15.

[0070] The control chip 16 is connected to the control terminal of the second soft-drive switch Q14 of the starter circuit 114 via the drive circuit connection pin PC12, to the output terminal of the comparator U13 of the current detection circuit 113 via the overcurrent detection connection pin PC1, to the output terminal of the third operational amplifier U21 of the temperature detection circuit 12 via the temperature detection connection pin PC2, to the output terminal of the speed sensor of the acceleration detection circuit via the acceleration detection connection pin PC10, and to the second heating switch of the heating element drive circuit 15 via the heating drive connection pin PB4. The control terminal of the switch Q52 is connected to the control terminal of the second heat dissipation switch Q42 of the fan drive circuit 14 via the heat dissipation drive connection pin PB3. It is connected to the mechanical hard disk 18 via the mechanical hard disk connection pins PA10 and PA9. It is connected to the NOR non-volatile memory 17 via the memory connection pins PB0 and PB1. It is connected to the multi-select analog switch chip U14 via the overcurrent detection setting pins PC7, PC6 and PB15 via the setting pins A0, A1 and A2. The control chip 16 is a microcontroller chip of model 32F103RCT6.

[0071] Please refer to Figures 2-8 The following details the specific working principle of the hard disk drive module 10 of the present invention driving the mechanical hard disk 18.

[0072] When the mechanical hard drive in the vehicle-mounted device is in normal use, the mechanical hard drive drive circuit 11 will receive an external voltage input signal (such as a 12V power input signal or a 5V power input signal). Then, the Zener diode D11 of the filter sub-circuit 111 eliminates the surge voltage of the input voltage signal. The filter capacitor C11 and filter inductor L11 of the filter sub-circuit 111 can effectively filter the input voltage signal. Then, the protection sub-circuit 112 can effectively protect the input voltage signal from overvoltage and reverse connection.

[0073] When the input signal passes through the current sensing resistor R12, the first operational amplifier U11 of the differential current detection unit 1131 generates a detection voltage based on the voltage difference across the current sensing resistor R12. The first operational amplifier U12 amplifies the detection voltage and inputs it to the first input terminal of the comparator U13. Under the control of the overcurrent detection setting pins PC7, PC6, and PB15 of the control chip 16, the multi-select analog switch chip U14 can be configured to connect different input pins to the output pin Z. For example, when the setting pins A0, A1, and A2 of the multi-select analog switch chip U14 receive signals of 0, 0, and 0 respectively, the input pin Y0 is connected to the output pin Z; when the setting pins A0, A1, and A2 of the multi-select analog switch chip U14 receive signals of 0, 0, and 1 respectively, the input pin Y1 is connected to the output pin Z. In this way, the user can control the comparison voltage output by the output pin Z of the multi-select analog switch chip U14 by setting the output signal of the control chip 16. This comparison voltage is input to the second input terminal of the comparator U13. The comparator U13 determines whether the detected voltage is normal based on the detected voltage and the comparison voltage, and sends the detection signal to the overcurrent detection connection pin PC1 of the control chip 16. The output signal of the control chip 16, which is set by the user, can be set in the NOR non-volatile memory 17. In this way, the control chip 16 can select the corresponding output signal to output to the multi-select analog switch chip U14 based on different signals from the mechanical hard disk.

[0074] If the control chip 16 detects that the detection signal is normal, the control chip 16 sends a drive signal to the starter circuit 114 through the drive circuit connection pin PC12, so that the first soft start switch Q13 is turned on, and the input voltage signal can be effectively input to the mechanical hard disk 18, driving the mechanical hard disk 18 to work normally. The mechanical hard disk 18 can stably and continuously receive vehicle data from the vehicle equipment integrated machine.

[0075] During normal operation of the hard disk drive 18, the control chip 16 detects the operating temperature of the hard disk drive 18 through the temperature detection connection pin PC2. When the operating temperature of the hard disk drive 18 is too high, the control chip 16 drives the fan 41 to work through the heat dissipation drive connection pin PB3 to cool down the hard disk drive 18. When the operating temperature of the hard disk drive 18 is too low, the control chip 16 drives the heating element 51 to work through the heating drive connection pin PB4 to heat up the hard disk drive 18.

[0076] If the temperature detection pin PC2 of the control chip 16 detects an abnormal operating temperature of the hard disk drive 18, or the acceleration detection pin PC10 of the control chip 16 detects an abnormal change in acceleration in a certain direction of the hard disk drive 18 (such as excessive vibration), the control chip 16 will drive the hard disk drive circuit 11 to stop working through the drive circuit connection pin PC12. Subsequently, the control chip 16 will drive the NOR non-volatile memory 17 to temporarily receive critical vehicle data through the memory connection pins PB0 and PB1 to avoid interruption of the reception of critical vehicle data. When the above abnormality stops, the control chip 16 will drive the hard disk drive circuit 11 to continue working through the drive circuit connection pin PC12. At the same time, the control chip 16 will send the critical vehicle data temporarily received by the NOR non-volatile memory 17 to the hard disk drive 18 through the hard disk connection pins PA10 and PA9 to ensure that the hard disk drive 18 stores complete vehicle data.

[0077] This completes the process of the hard drive driver module driving the mechanical hard drive in this embodiment.

[0078] The control chip of the hard disk drive module in this embodiment can effectively detect the operating parameters of the hard disk drive, such as operating temperature, vibration during operation, and operating voltage and current. When the above operating parameters are normal, the hard disk drive module can drive the hard disk drive to record vehicle data; when the above operating parameters are abnormal, the hard disk drive module stops driving the hard disk drive and uses NOR non-volatile memory to record vehicle data, thereby improving the service life of the hard disk drive of the vehicle device while ensuring the completion of vehicle data recording.

[0079] The present invention also provides an in-vehicle device that can continuously record environmental data outside the vehicle and vehicle condition data. The in-vehicle device is equipped with the aforementioned hard disk drive module to effectively record the environmental data and vehicle condition data (collectively referred to as in-vehicle data) using a corresponding mechanical hard disk and NOR non-volatile memory.

[0080] The driving principle of this hard disk drive module for mechanical hard disks and NOR non-volatile memory is the same as or similar to the specific working principle of the hard disk drive module described above. For details, please refer to the relevant description of the specific embodiments of the hard disk drive module described above.

[0081] The hard disk drive module and the control chip of the vehicle-mounted device integrated machine of the present invention can effectively detect the working environment of the mechanical hard disk. It can use NOR non-volatile memory to record vehicle data when the vehicle is in poor condition, and use the mechanical hard disk to record vehicle data and transfer memory contents when the vehicle is in normal condition. This improves the effectiveness of the mechanical hard disk and extends the service life of the mechanical hard disk in the vehicle-mounted device.

[0082] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A hard disk drive module, characterized in that, include: The hard disk drive circuit is used to supply power to the corresponding hard disk drive. A temperature detection circuit is used to detect the operating temperature of the hard disk drive; An acceleration detection circuit is used to detect the three-axis acceleration of the hard disk drive; Fan drive circuit, used to start the cooling fan; Heating element drive circuit, used to start the heating element module; The control chip is connected to the mechanical hard disk drive circuit, the temperature detection circuit, the acceleration detection circuit, the fan drive circuit, and the heating element drive circuit, respectively, and provides control signals to the above circuits; as well as The NOR non-volatile memory is connected to the control chip and is used to store the control parameters of the control chip and the temporary data of the mechanical hard disk. The control chip can select the corresponding control parameters to output to the multi-select analog switch chip based on different signals from the mechanical hard disk. The mechanical hard disk drive circuit includes: The protection sub-circuit is used for overvoltage and reverse connection protection of the input signal; A current sensing sub-circuit is used to perform overcurrent detection on the input signal based on the current sensing resistor in the hard disk drive circuit. The current sensing sub-circuit includes a differential current detection unit, an overcurrent detection comparison unit, and a reference voltage selection unit. The differential current detection unit generates a detection voltage, the overcurrent detection comparison unit generates a current sensing interrupt signal based on a preset reference voltage and the detection voltage, and the reference voltage selection unit sets a corresponding preset reference voltage based on a reference voltage setting signal from the control chip. A startup sub-circuit is used to receive signals from the control chip and control input signals to the hard disk drive. The differential current detection unit includes a first operational amplifier and a second operational amplifier; the overcurrent detection comparison unit includes a comparator; the reference voltage selection unit is a multi-to-one analog switch chip. The first input terminal of the first operational amplifier is connected to one end of the current sensing resistor, the second input terminal of the first operational amplifier is connected to the other end of the current sensing resistor, the output terminal of the first operational amplifier is connected to the first input terminal of the second operational amplifier, the second input terminal of the second operational amplifier is grounded through a voltage divider resistor, the output terminal of the second operational amplifier is connected to the first input terminal of the comparator, the second input terminal of the comparator is connected to the output pin of the multi-select analog switch chip, and the output terminal of the comparator is connected to the interrupt pin of the control chip. The multi-select analog switch chip includes multiple setting pins, multiple input pins, and one output pin. The multiple setting pins are connected to the control chip, and different input pins are connected to different voltage divider resistors so that different comparison voltages are input to the second input terminal of the comparator. When the control chip detects an abnormality in the hard drive, it drives the hard drive drive circuit to stop working through the drive circuit connection pin. Subsequently, the control chip drives the NOR non-volatile memory to temporarily receive critical vehicle data through the memory connection pin to avoid interruption of critical vehicle data reception. When the abnormality stops, the control chip drives the hard drive drive circuit to continue working through the drive circuit connection pin. At the same time, the control chip sends the critical vehicle data temporarily received by the NOR non-volatile memory to the hard drive through the hard drive connection pin to ensure that the hard drive stores complete vehicle data.

2. The hard disk drive module according to claim 1, characterized in that, The protection sub-circuit includes a Zener diode, a first protection switch, and a second protection switch. The positive terminal of the Zener diode is grounded, and the negative terminal of the Zener diode is connected to the input terminal of the protection sub-circuit through a current-limiting resistor. The control terminal of the first protection switch is connected to the negative terminal of the Zener diode. The first connection terminal of the first protection switch is connected to the input terminal of the protection sub-circuit. The second connection terminal of the first protection switch is connected to the control terminal of the second protection switch. The first connection terminal of the second protection switch is connected to the output terminal of the protection sub-circuit, and the second connection terminal of the second protection switch is connected to the first connection terminal of the first protection switch.

3. The hard disk drive module according to claim 1, characterized in that, The starter circuit includes a soft-start capacitor, a first soft-start switch, and a second soft-start switch. The first connection terminal of the first soft-start switch is connected to the input terminal of the current detection circuit, the second connection terminal of the first soft-start switch is connected to the output terminal of the current detection circuit, the control terminal of the first soft-start switch is connected to the first connection terminal of the second soft-start switch, the second connection terminal of the second soft-start switch is grounded, and the control terminal of the second soft-start switch is connected to the control chip.

4. The hard disk drive module according to claim 1, characterized in that, The heating element driving circuit includes a first heating switch tube and a second heating switch tube. The first connection terminal of the first heating switch tube is connected to the power supply, the second connection terminal of the first heating switch tube is connected to the heating element, the control terminal of the first heating switch tube is connected to the first connection terminal of the second heating switch tube, the second connection terminal of the second heating switch tube is grounded, and the control terminal of the second heating switch tube is connected to the control chip. The fan drive circuit includes a first heat dissipation switch tube and a second heat dissipation switch tube. The first connection terminal of the first heat dissipation switch tube is connected to the power supply, the second connection terminal of the first heat dissipation switch tube is connected to the fan, the control terminal of the first heat dissipation switch tube is connected to the first connection terminal of the second heat dissipation switch tube, the second connection terminal of the second heat dissipation switch tube is grounded, and the control terminal of the second heat dissipation switch tube is connected to the control chip. The temperature detection circuit includes a third operational amplifier. The first input terminal of the third operational amplifier is connected to a thermistor disposed on the mechanical hard disk. The second input terminal of the third operational amplifier is grounded. The output terminal of the third operational amplifier is connected to the control chip. The acceleration detection circuit includes a speed sensor for detecting acceleration in various directions of the hard disk drive, and the output of the speed sensor is connected to the control chip.

5. The hard disk drive module according to claim 1, characterized in that, The control chip includes power supply pins, ground pins, drive circuit connection pins, overcurrent detection connection pins, temperature detection connection pins, acceleration detection connection pins, heating drive connection pins, heat dissipation drive connection pins, hard disk connection pins, and memory connection pins. The control chip is connected to the starter circuit via the drive circuit connection pin, to the current detector circuit via the overcurrent detection connection pin, to the temperature detection circuit via the temperature detection connection pin, to the acceleration detection circuit via the acceleration detection connection pin, to the heating element drive circuit via the heating drive connection pin, to the fan drive circuit via the heat dissipation drive connection pin, to the hard disk drive via the hard disk connection pin, and to the NOR non-volatile memory via the memory connection pin.

6. The hard disk drive module according to claim 5, characterized in that, The control chip is a microcontroller chip of model 32F103RCT6.

7. An integrated vehicle-mounted device using any one of the hard disk drive modules of claims 1-6.

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