CN103474088A - Vehicle-mounted hard disk drive video recorder and hard disk drive monitoring system based on vehicle-mounted hard disk drive video recorder - Google Patents
Vehicle-mounted hard disk drive video recorder and hard disk drive monitoring system based on vehicle-mounted hard disk drive video recorder Download PDFInfo
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- CN103474088A CN103474088A CN2013102763258A CN201310276325A CN103474088A CN 103474088 A CN103474088 A CN 103474088A CN 2013102763258 A CN2013102763258 A CN 2013102763258A CN 201310276325 A CN201310276325 A CN 201310276325A CN 103474088 A CN103474088 A CN 103474088A
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Abstract
The invention is suitable for the technical field of security and protection monitoring, and provides a vehicle-mounted hard disk drive video recorder and a hard disk drive monitoring system based on the vehicle-mounted hard disk drive video recorder. The hard disk drive monitoring system based on the vehicle-mounted hard disk drive video recorder is connected with an external hard disk drive, and comprises a short circuit detection circuit and a controller. The output end of the short circuit detection circuit is connected with a power supply end of the hard disk drive. The short circuit detection circuit detects the supply current to the hard disk drive, and outputs a short circuit signal to a controller when the supply current is larger than a short circuit current threshold, and outputs a normal signal to the controller when the supply current is smaller than the short circuit current threshold. The detection end and the control end of the controller are connected with a detection output end and a controller end of the short circuit detection circuit respectively. The controller receives the short circuit signal, gives a power supply cut-off signal back to the short circuit detection circuit, receives the normal signal and gives a normal power supply signal back to the short circuit detection circuit. As a result, the normal operation of the vehicle-mounted hard disk drive video recorder is guaranteed in real time.
Description
Technical field
The invention belongs to the safety monitoring technical field, relate in particular to vehicle-mounted hard disk videocorder and the hard disk supervisory system based on vehicle-mounted hard disk videocorder.
Background technology
In vehicle-mounted mobile monitoring technique field, generally adopt hard disk as data storage device; When car in the process of moving, the hard disk in vehicle-mounted hard disk videocorder is subject to the impacts such as shock and vibration and high low temperature unavoidably, very easily causes damaging hard disk, cause to hard disk for electrical short.Once occur hard disk for electrical short, light affect the normal operation of the hard disk supervisory system based on vehicle-mounted hard disk videocorder, heavy burn whole vehicle-mounted hard disk videocorder.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of hard disk supervisory system based on vehicle-mounted hard disk videocorder, is intended to the whether short circuit of power supply of Real-Time Monitoring hard disk, if short circuit disconnects in time to the hard disk power supply, with the real-time guard hard disk.
The embodiment of the present invention is achieved in that the hard disk supervisory system based on vehicle-mounted hard disk videocorder, the described hard disk supervisory system external hard drive based on vehicle-mounted hard disk videocorder, and the described hard disk supervisory system based on vehicle-mounted hard disk videocorder comprises:
Output terminal is connected with the power end of described hard disk, the supply current of detection to described hard disk, when being more than or equal to the short-circuit current threshold value, described supply current to controller output short-circuit signal, exports the short-circuit detecting circuit of normal signal to described controller when described supply current is less than described short-circuit current threshold value;
Test side is connected with controlled end with the detection output terminal of described short-circuit detecting circuit respectively with control end, receive described short-circuit signal and feed back signal to the described short-circuit detecting circuit of stopping power supply and power to hard disk to stop described short-circuit detecting circuit, receiving described normal signal and feed back the normal power supply signal to the described controller of described short-circuit detecting circuit to keep described short-circuit detecting circuit to power to hard disk.
Further, the described hard disk supervisory system based on vehicle-mounted hard disk videocorder also comprises:
Mutual control end is connected with the interaction feedback end of described controller, the short trouble signal sent for receiving described controller, obtain maintenance instructions that the user triggers to trigger maintenance signal, and will described maintenance signal be sent to described controller and export the extremely background processor of described short-circuit detecting circuit of described normal power supply signal with trigger controller.
Further, described controller is single-chip microcomputer or ARM.
Further, described background processor is PC computer or notebook computer or panel computer.
Further, the interaction feedback end of the mutual control end of described background processor and described controller adopts wireless connections or wired connection.
Further, described short-circuit detecting circuit comprises:
Short-circuit detecting chip U2, pull-up resistor R1, pull-up resistor R2 and reference resistance R3;
The power pins of described short-circuit detecting chip U2 and ground pin connect respectively VDD-to-VSS, described pull-up resistor R1 is connected between the detection output pin and power supply of described short-circuit detecting chip U2, described pull-up resistor R2 is connected between the controlled pin and power supply of described short-circuit detecting chip U2, described reference resistance R3 is connected between the reference pin and ground of described short-circuit detecting chip U2, and the detection output pin of described short-circuit detecting chip U2, controlled pin and output pin are respectively detection output terminal, controlled end and the output terminal of described short-circuit detecting circuit.
Further, the model of short-circuit detecting chip U2 is ATT4601.
Further, described controller adopts control chip U1;
The detection pin of described control chip U1 and control pin are respectively test side and the control end of described controller.
Another purpose of the present invention is to provide a kind of vehicle-mounted hard disk videocorder, described vehicle-mounted hard disk videocorder comprises hard disk, described vehicle-mounted hard disk videocorder comprises the above-mentioned hard disk supervisory system based on vehicle-mounted hard disk videocorder, the external described hard disk of the described hard disk supervisory system based on vehicle-mounted hard disk videocorder.
The invention provides a kind of hard disk supervisory system based on vehicle-mounted hard disk videocorder, short-circuit detecting circuit detects the supply current to described hard disk in real time, if hard disk corruptions causes the electrical short that supplies to hard disk, described supply current can be more than or equal to the short-circuit current threshold value, controller is controlled short-circuit detecting circuit and is disconnected the power supply to hard disk, meanwhile, background processor receives the short trouble signal to remind the maintenance personal to repair or replace hard disk, wait to keep in repair or change complete, controller restarts short-circuit detecting circuit the supply current of hard disk is detected, until disk recovery normal operation, thereby, the normal operation of real-time ensuring vehicle-mounted hard disk videocorder.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the composition structural drawing of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that provides of the embodiment of the present invention;
Fig. 2 is that another of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that provides of the embodiment of the present invention forms structural drawing;
Fig. 3 is the physical circuit figure of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that provides of the embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
For technical solutions according to the invention are described, below by specific embodiment, describe.
Fig. 1 shows the structure of the driving circuit that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
Hard disk supervisory system based on vehicle-mounted hard disk videocorder, the described hard disk supervisory system external hard drive based on vehicle-mounted hard disk videocorder, the described hard disk supervisory system based on vehicle-mounted hard disk videocorder comprises:
Output terminal is connected with the power end of described hard disk, the supply current of detection to described hard disk, when being more than or equal to the short-circuit current threshold value, described supply current to controller 2 output short-circuit signals, exports the short-circuit detecting circuit 1 of normal signal to controller 2 when described supply current is less than described short-circuit current threshold value;
Test side is connected with controlled end with the detection output terminal of described short-circuit detecting circuit 1 respectively with control end, receive described short-circuit signal feedback stop power supply signal to described short-circuit detecting circuit 1 to stop described short-circuit detecting circuit 1 to hard disk power supply, receive described normal signal and feed back the normal power supply signal to described short-circuit detecting circuit 1 to keep the described controller 2 of described short-circuit detecting circuit 1 to the hard disk power supply.
It should be noted that, described controller 2 can adopt controller existing, that have the calculation process ability, at this, does not do restriction.Preferably, described controller 2 is the programmable logic device (PLD) such as single-chip microcomputer or ARM.Function by the controller 2 of being programmed in programmable logic device (PLD) such as single-chip microcomputer or ARM to realize that the present embodiment provides.
Due to car in the process of moving, the hard disk in vehicle-mounted hard disk videocorder is subject to the impacts such as shock and vibration and high low temperature unavoidably, causes hard disk corruptions, may occur the supply current of the hard disk situation of excessive (surpass short-circuit current).Wherein, described short-circuit current threshold value is: hard disk corruptions, and to hard disk when the electrical short, the size of current that the power end of hard disk flows into.
Therefore in this enforcement, power supply by short-circuit detecting circuit 1 to the hard disk power supply (preferably, short-circuit detecting circuit 1 is 5V to the supply voltage of hard disk normal power supply) time, the supply current detected described hard disk once short-circuit detecting circuit 1 is more than or equal to the short-circuit current threshold value, the detection output terminal of short-circuit detecting circuit 1 is to the test side output short-circuit signal of controller 2, controller 2 feeds back to the controlled end of controlling described short-circuit detecting circuit 1 signal of stopping power supply by control end, thereby the output terminal that stops short-circuit detecting circuit 1 is powered to hard disk, effectively stopped any operation (for example: forbid hard disk is carried out to read-write operation) to hard disk, hard disk and hard disc data have effectively been protected.
When power supply is normal to the power supply of hard disk by short-circuit detecting circuit 1, when short-circuit detecting circuit 1 detects supply current to described hard disk and is less than the short-circuit current threshold value, the detection output terminal of short-circuit detecting circuit 1 is to the test side output normal signal of controller 2, controller 2 feeds back the normal power supply signal by control end to the controlled end of controlling described short-circuit detecting circuit 1, thereby the output terminal of controller 2 is normally powered to hard disk.Can normally to hard disk, (for example: the read-write operation that hard disk is carried out) be operated.
Fig. 2 is that another of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that provides of the embodiment of the present invention forms structure, for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
As one embodiment of the invention, the described hard disk supervisory system based on vehicle-mounted hard disk videocorder also comprises:
Mutual control end is connected with the interaction feedback end of described controller 2, the short trouble signal sent for receiving described controller 2, obtain maintenance instructions that the user triggers to trigger maintenance signal, and will described maintenance signal be sent to described controller 2 with the described normal power supply signal of the trigger controller 2 output background processor 3 of described short-circuit detecting circuit 1 extremely.
In the present embodiment, if the supply current that short-circuit detecting circuit 1 detects described hard disk is more than or equal to the short-circuit current threshold value, then, when the test side of controller 2 receives the short-circuit signal of detection output terminal output of short-circuit detecting circuit 1, controller 2 by control end to the controlled end feedback of described short-circuit detecting circuit 1 signal of stopping power supply; Meanwhile, the interaction feedback end of controller 2 sends the short trouble signal to the mutual control end of background processor 3, background processor 3 is sent repair prompt, and (for example: background processor 3 shows " hard disk detects abnormal; ask on-call maintenance or replacing " by display, simultaneously, by loudspeaker, report to the police), after until the maintenance personal, hard disk being completed the operations such as maintenance or replacement, by modes such as button, touches, to background processor 3, send described maintenance instructions; After background processor 3 receives described maintenance instructions, produce described maintenance signal and send to the interaction feedback end of controller 2; Then, after controller 2 receives described maintenance signal, trigger described normal power supply signal and be sent to the controlled end of described short-circuit detecting circuit 1, thereby the output terminal of short-circuit detecting circuit 1 is normally to hard disk power supply (to the voltage of hard disk output 5V); If the hard disk keeped in repair after rear or replacing remains distress condition, the supply current that short-circuit detecting circuit 1 detects described hard disk still can be more than or equal to the short-circuit current threshold value; Thereby background processor 3 can receive the short trouble signal again, send repair prompt to remind the maintenance personal again keep in repair or change.
Preferably, described background processor 3 is the equipment that PC computer or notebook computer or panel computer etc. have operation processing function.
Preferably, the interaction feedback end of the mutual control end of described background processor 3 and described controller 2 adopts wireless connections or wired connection.It should be noted that, described wireless connections comprise by wireless radio-frequencies such as WIFI, bluetooths and connecting.It should be noted that, described wired connection comprises wired connected modes such as serial ports, parallel port and USB interface.
Fig. 3 is the physical circuit of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that provides of the embodiment of the present invention, for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
As one embodiment of the invention, described short-circuit detecting circuit 1 comprises:
Short-circuit detecting chip U2, pull-up resistor R1, pull-up resistor R2 and reference resistance R3;
The power pins IN of described short-circuit detecting chip U2 and ground pin GND connect respectively power supply VCC and ground, described pull-up resistor R1 is connected between the detection output pin FAULT and power supply VCC of described short-circuit detecting chip U2, described pull-up resistor R2 is connected between the controlled pin ON and power supply VCC of described short-circuit detecting chip U2, described reference resistance R3 is connected between the reference pin SET and ground of described short-circuit detecting chip U2, the detection output pin FAULT of described short-circuit detecting chip U2, controlled pin ON and output pin OUT are respectively the detection output terminal of described short-circuit detecting circuit 1, controlled end and output terminal.
It should be noted that, adjust the resistance of reference resistance R3, can realize the adjustment to described short-circuit current threshold value.
As one embodiment of the present invention, the model of short-circuit detecting chip U2 is ATT4601.
As one embodiment of the invention, described controller 2 adopts control chip U1;
The detection pin TEST of described control chip U1 and control pin C are respectively test side and the control end of described controller 2.
It should be noted that, described control chip U1 also has the interaction feedback end, by the mutual control end of this interaction feedback end and background processor 3, sets up wireless or wired connection.
Another purpose of the present invention is to provide a kind of vehicle-mounted hard disk videocorder, described vehicle-mounted hard disk videocorder comprises hard disk, described vehicle-mounted hard disk videocorder comprises the above-mentioned hard disk supervisory system based on vehicle-mounted hard disk videocorder, the external described hard disk of the described hard disk supervisory system based on vehicle-mounted hard disk videocorder.
The following describes the principle of work of the hard disk supervisory system based on vehicle-mounted hard disk videocorder that the present embodiment provides:
In order to guarantee the stability of communicating by letter between short-circuit detecting chip U2 and control chip U1, the detection output pin FAULT of the detection pin TEST of described control chip U1 and described short-circuit detecting chip U2 all meets power supply VCC by pull-up resistor R1; In like manner, the controlled pin ON of the control pin C of described control chip U1 and described short-circuit detecting chip U2 all meets power supply VCC by pull-up resistor R2.
In the situation of hard disk normal operation, the supply current that short-circuit detecting chip U2 detects described hard disk can be less than the short-circuit current threshold value, the detection output pin FAULT of short-circuit detecting chip U2 can export high level (normal signal), after the detection pin TEST of control chip U1 receives this high level, trigger the control pin C output low level (normal power supply signal) of control chip U1, short-circuit detecting chip U2 normally powers to hard disk by output pin OUT;
Work as hard disk corruptions, during to the short circuit of hard disk power supply, the supply current that short-circuit detecting chip U2 detects described hard disk can be more than or equal to the short-circuit current threshold value, the detection output pin FAULT meeting output low level (short-circuit signal) of short-circuit detecting chip U2, after the detection pin TEST of control chip U1 receives this low level, trigger the control pin C output high level (signal of stopping power supply) of control chip U1 and power to hard disk by output pin OUT to stop short-circuit detecting chip U2; In this simultaneously, the interaction feedback end of control chip U1 sends the short trouble signal to background processor 3, treat that the maintenance personal completes the operation of hard disk maintenance or hard disk replacement, after background processor 3 receives the maintenance instructions of user's triggering, background processor 3 sends maintenance signal to control chip U1, thereby control chip U1 is by controlling pin C output low level, short-circuit detecting chip U2 is detected the supply current of hard disk again.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise some alternative or obvious modification that are equal to; and performance or purposes identical, all should be considered as belonging to the present invention's scope of patent protection definite by submitted to claims.
Claims (9)
1. the hard disk supervisory system based on vehicle-mounted hard disk videocorder, the described hard disk supervisory system external hard drive based on vehicle-mounted hard disk videocorder, is characterized in that, the described hard disk supervisory system based on vehicle-mounted hard disk videocorder comprises:
Output terminal is connected with the power end of described hard disk, the supply current of detection to described hard disk, when being more than or equal to the short-circuit current threshold value, described supply current to controller output short-circuit signal, exports the short-circuit detecting circuit of normal signal to described controller when described supply current is less than described short-circuit current threshold value;
Test side is connected with controlled end with the detection output terminal of described short-circuit detecting circuit respectively with control end, receive described short-circuit signal and feed back signal to the described short-circuit detecting circuit of stopping power supply and power to hard disk to stop described short-circuit detecting circuit, receiving described normal signal and feed back the normal power supply signal to the described controller of described short-circuit detecting circuit to keep described short-circuit detecting circuit to power to hard disk.
2. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 1, is characterized in that, the described hard disk supervisory system based on vehicle-mounted hard disk videocorder also comprises:
Mutual control end is connected with the interaction feedback end of described controller, the short trouble signal sent for receiving described controller, obtain maintenance instructions that the user triggers to trigger maintenance signal, and will described maintenance signal be sent to described controller and export the extremely background processor of described short-circuit detecting circuit of described normal power supply signal with trigger controller.
3. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 1, is characterized in that, described controller is single-chip microcomputer or ARM.
4. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 2, is characterized in that, described background processor is PC computer or notebook computer or panel computer.
5. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 2, is characterized in that, the mutual control end of described background processor and the interaction feedback end of described controller adopt wireless connections or wired connection.
6. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 1, is characterized in that, described short-circuit detecting circuit comprises:
Short-circuit detecting chip U2, pull-up resistor R1, pull-up resistor R2 and reference resistance R3;
The power pins of described short-circuit detecting chip U2 and ground pin connect respectively VDD-to-VSS, described pull-up resistor R1 is connected between the detection output pin and power supply of described short-circuit detecting chip U2, described pull-up resistor R2 is connected between the controlled pin and power supply of described short-circuit detecting chip U2, described reference resistance R3 is connected between the reference pin and ground of described short-circuit detecting chip U2, and the detection output pin of described short-circuit detecting chip U2, controlled pin and output pin are respectively detection output terminal, controlled end and the output terminal of described short-circuit detecting circuit.
7. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 6, is characterized in that, the model of short-circuit detecting chip U2 is ATT4601.
8. the hard disk supervisory system based on vehicle-mounted hard disk videocorder as claimed in claim 1, is characterized in that, described controller adopts control chip U1;
The detection pin of described control chip U1 and control pin are respectively test side and the control end of described controller.
9. a vehicle-mounted hard disk videocorder, described vehicle-mounted hard disk videocorder comprises hard disk, it is characterized in that, described vehicle-mounted hard disk videocorder comprises that claim 1 is to the arbitrary described hard disk supervisory system based on vehicle-mounted hard disk videocorder of claim 8, the external described hard disk of the described hard disk supervisory system based on vehicle-mounted hard disk videocorder.
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| CN110392267A (en) * | 2019-08-02 | 2019-10-29 | 湖南柿竹园有色金属有限责任公司 | A kind of low cost mining production scene automation centralized monitoring method |
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