CN211086558U - Network camera fault detection circuit and device - Google Patents
Network camera fault detection circuit and device Download PDFInfo
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- CN211086558U CN211086558U CN201921418735.0U CN201921418735U CN211086558U CN 211086558 U CN211086558 U CN 211086558U CN 201921418735 U CN201921418735 U CN 201921418735U CN 211086558 U CN211086558 U CN 211086558U
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Abstract
The utility model discloses a network camera fault detection circuit and device, network camera fault detection circuit includes: the device comprises a power management module, a control chip and a wireless communication module; the power supply management module is used for detecting the power supply state of the main power supply and supplying power to the control chip through the standby power supply when the main power supply is powered off; the control chip is used for sending the power failure information to a monitoring server when the main power supply is powered off; the control chip is also used for determining the fault type according to the fault signal sent by the network camera and sending the fault type to the monitoring server. The utility model discloses can break down and can't detect the trouble reason when carrying out network communication at the internet protocol camera to send the trouble type to the trouble reason of monitoring server with the quick determination internet protocol camera, thereby shorten troubleshooting time and maintenance and repair time, reduce the whole maintenance cost of internet protocol camera.
Description
Technical Field
The utility model relates to a circuit electron field especially relates to network camera fault detection circuit and device.
Background
In an existing network camera, a communication module is generally provided to enable the network camera to communicate with a server. However, the network camera usually has failures such as power failure, network disconnection, and crash during operation, and after the failures occur, the network camera cannot communicate with the server, which shows that the network communication state of the network camera is changed to offline. When the server determines that the equipment has a fault according to the communication interruption of the network camera, the server cannot further determine a specific fault reason, so that fault diagnosis and troubleshooting are required to be performed on the fault reason when fault repair is performed. Therefore, how to accurately locate the cause of the failure when the network camera fails becomes a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a network camera fault detection circuit and device, which can not determine the fault type when solving the existing network camera fault.
In order to achieve the above object, the present invention provides a network camera fault detection circuit for detecting the fault type of the network camera, including:
the first input end of the power management module is connected with a main power supply, and the second input end of the power management module is connected with a standby power supply;
the power supply end of the control chip is connected with the output end of the power management module, and the signal receiving end of the control chip is connected with the network camera;
the signal input end of the wireless communication module is connected with the signal output end of the control chip;
the power supply management module is used for detecting the power supply state of the main power supply and supplying power to the control chip through the main power supply when the main power supply is in a normal power supply state; when the main power supply is powered off, the standby power supply supplies power to the control chip and sends power-off information to the control chip;
the control chip is used for sending the power failure information to a monitoring server through the wireless communication module when receiving the power failure information;
and the control chip is also used for determining the fault type of the network camera according to the fault signal after receiving the fault signal sent by the network camera, and sending the fault type to the monitoring server through the wireless communication module.
Optionally, the power management module includes a power switching circuit; the power supply switching circuit comprises a first triode, a second triode, a first MOS (metal oxide semiconductor) tube, a first resistor, a second resistor, a third resistor and a fourth resistor;
the output end of the main power supply is connected with the power supply end of the control chip;
the base electrode of the first triode is connected with a main power supply through the first resistor, the base electrode of the first triode is grounded through the second resistor, and the emitting electrode of the first triode is grounded; the base electrode of the second triode is connected with a standby power supply through a third resistor, the base electrode of the second triode is also connected with the collector electrode of the first triode, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the standby power supply through a fourth resistor; the grid electrode of the first MOS tube is connected with the collector electrode of the second triode, the grid electrode of the first MOS tube is grounded through a fifth resistor, the source electrode of the first MOS tube is connected with a standby power supply, and the drain electrode of the first MOS tube is connected with the power supply end of the control chip;
the power supply switching circuit is used for detecting the output voltage of a main power supply and supplying power to the control chip through the main power supply when the output voltage of the main power supply is at a high level; and when the output voltage of the main power supply is at a low level, the standby power supply supplies power to the control chip.
Optionally, the power switching circuit further comprises a first diode and a second diode;
the output end of the main power supply is connected with the power supply end of the control chip through the first diode, the anode of the first diode is connected with the output end of the main power supply, and the cathode of the first diode is connected with the power supply end of the control chip;
the drain electrode of the first MOS tube is connected with the power supply end of the control chip through the second diode, the anode of the second diode is connected with the drain electrode of the first MOS tube, and the cathode of the second diode is connected with the power supply end of the control chip.
Optionally, the power switching circuit further includes a reverse diode, an anode of the reverse diode is connected to the drain of the first MOS transistor, and a cathode of the reverse diode is connected to the source of the first MOS transistor.
Optionally, the first MOS transistor is a P-channel enhancement type field effect transistor.
Optionally, the power management module further comprises a power detection circuit, wherein the power detection circuit comprises a voltage detection chip, a sixth resistor, a seventh resistor, a first capacitor and a second capacitor, wherein the voltage detection chip is B L8506-27 CRM type;
the VDD pin of the voltage detection chip is connected with a main power supply through a fifth resistor, the VDD pin of the voltage detection chip is grounded through a sixth resistor and a first capacitor respectively, the VSS pin of the voltage detection chip is grounded, and the VOUT pin of the voltage detection chip is grounded through a second capacitor;
the voltage detection chip is used for controlling the VOUT pin to output a high level to the control chip when the VDD pin receives the output voltage of a main power supply; when the VDD pin does not receive the output voltage of a main power supply, controlling the VOUT pin to output a low level to the control chip;
and the control chip is used for sending power failure information to a monitoring server through the wireless communication module when receiving the low level output by the VOUT pin.
Optionally, the output end of the main power supply is connected to the charging input end of the standby power supply through the power management module;
the power supply management module is further used for charging the standby power supply through the main power supply when the main power supply is in a normal power supply state.
Optionally, a first signal receiving end of the control chip is connected with an alarm signal end of the network camera, and a second signal receiving end of the control chip is connected with a data transmission end of the network camera;
the control chip is used for sending the fault type corresponding to the alarm signal to the monitoring server through the wireless communication module when receiving the alarm signal sent by the alarm signal end of the network camera;
the control chip is also used for determining that the network camera is in a normal working state when receiving preset data sent by a data transmission end of the network camera according to a preset period; when preset data sent by a data transmission end of the network camera according to a preset period is not received, the network camera is determined to be in an abnormal state, and fault information corresponding to the abnormal state is sent to a monitoring server through the wireless communication module.
Optionally, the wireless communication module is an NB-IoT module.
In addition, in order to achieve the above object, the present invention also provides a network camera fault detection device, which includes a network camera fault detection circuit connected to the network camera, wherein the network camera fault detection circuit is configured as the network camera fault detection circuit described above.
The utility model discloses a set up power management module, can switch to stand-by power supply and supply power for control chip when the main power supply outage of network camera to maintain control chip's normal operating. When the standby power supply is switched to supply power, power failure information can be sent to the control chip, so that the control chip sends power failure information to the monitoring server, and the monitoring server can determine that the failure reason of the network camera is power failure of the main power supply after receiving the power failure information. When the main power supply is not powered off, the network camera can send a corresponding fault signal to the control chip when a fault occurs, and the control chip can determine the fault type according to the fault signal and send the fault type to the monitoring server, so that the monitoring server can determine the fault type of the network camera. According to the technical scheme, the failure reason can be verified when the network camera fails and network communication cannot be carried out, and the failure type is sent to the monitoring server so that the monitoring server can quickly locate the failure reason of the network camera, so that the failure troubleshooting time and the maintenance and repair time are shortened, and the overall maintenance cost of the network camera is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of the network camera fault detection circuit of the present invention;
fig. 2 is a schematic circuit diagram of a power switching circuit in an embodiment of the network camera fault detection circuit of the present invention;
fig. 3 is a schematic circuit diagram of a power detection circuit in an embodiment of the network camera fault detection circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Power supply management module | D | |
| 11 | Power |
12 | Power supply detection circuit |
| Q1 | A first triode | U1 | Voltage detection chip |
| Q2 | Second triode | R6 | Sixth resistor |
| MOS | First MOS transistor | R7 | Seventh resistor |
| R1 | A first resistor | C1 | First capacitor |
| R2 | Second resistance | C2 | Second capacitor |
| R3 | |
20 | Control chip |
| R4 | |
30 | Wireless communication module |
| R5 | |
40 | Main power supply |
| D1 | |
50 | Standby power supply |
| D2 | |
60 | Network camera |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a network camera fault detection circuit is applied to among the network camera fault detection device, and this network camera fault detection device can install in the network camera of various differences, detects the fault type of network camera when the network camera breaks down to the fault type that will detect and obtain sends to monitoring server.
Referring to fig. 1, in an embodiment, the network camera fault detection circuit includes a power management module 10, a control chip 20, and a wireless communication module 30. A first input of power management module 10 is connected to primary power source 40 and a second input of power management module 10 is connected to backup power source 50. The main power source 40 may be a power source for supplying power to the network camera 60, and the backup power source 50 may be a battery pack, such as a lithium battery pack, disposed beside the failure detection device of the network camera 60. The power supply terminal of the control chip 20 is connected to the output terminal of the power management module 10, and the signal receiving terminal of the control chip 20 is connected to the network camera 60. The signal input end of the wireless communication module 30 is connected with the signal output end of the control chip 20.
The power management module 10 may detect a power supply state of the main power source 40, that is, detect an output voltage of the main power source 40 to determine whether the main power source 40 is powered off. When the main power supply 40 is in a normal power supply state, the power management module 10 supplies power to the control chip 20 through the main power supply 40; when the main power source 40 is powered down, the power management module 10 may switch to the backup power source 50 to supply power to the control chip 20, and send the power down information of the power down of the main power source 40 back to the control chip 20. The control chip 20 may be kept running by being supplied with power from the main power source 40 or the backup power source 50, and when the control chip 20 receives the power-down information, the power-down information may be transmitted to the monitoring server through the wireless communication module 30. Since the network camera 60 cannot perform network communication due to the power failure of the main power source 40, after receiving the power failure information, the monitoring server can determine that the failure cause that the network camera 60 cannot perform network communication is the power failure of the main power source 40.
The network camera 60 may send a corresponding fault signal to the control chip 20 when a non-main power source 40 fails due to power failure, and after receiving the fault signal sent by the network camera 60, the control chip 20 may determine a fault type of the corresponding network camera 60 that fails according to the fault signal, and send the fault type to the monitoring server through the wireless communication module 30. Therefore, when the network camera 60 fails to perform network communication due to a failure other than the power failure of the main power supply 40, the type of failure of the network camera 60 can be determined by receiving the type of failure transmitted from the wireless communication module 30.
In the embodiment, by providing the power management module 10, when the main power 40 of the network camera 60 is powered off, the standby power 50 can be switched to supply power to the control chip 20, so as to maintain the normal operation of the control chip 20. When the power supply of the standby power supply 50 is switched, the power-down information can be sent to the control chip 20, so that the control chip 20 sends the power-down information to the monitoring server, and the monitoring server can determine that the failure reason of the network camera 60 is the power failure of the main power supply 40 after receiving the power-down information. When the main power supply 40 is not powered off, the network camera 60 may send a corresponding fault signal to the control chip 20 when a fault occurs, and the control chip 20 may determine a fault type according to the fault signal and send the fault type to the monitoring server, so that the monitoring server can determine the fault type of the network camera 60. According to the technical scheme, the fault reason can be verified when the network camera 60 fails and network communication cannot be carried out, and the fault type is sent to the monitoring server so that the monitoring server can quickly locate the fault reason of the network camera 60, so that the fault troubleshooting time and the maintenance and repair time are shortened, and the overall maintenance cost of the network camera 60 is reduced.
It should be noted that, in the above technical solution, the hardware circuit structure of the network camera fault detection circuit is mainly protected, and the information transmission control program recorded in the control chip 20 is a common technical means in the field, and is not described herein again.
Referring to fig. 1 and 2 together, in the above embodiment, the power management module 10 may include a power switching circuit 11. The power switching circuit 11 includes a first transistor Q1, a second transistor Q2, a first MOS transistor MOS, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. An output terminal of the main power supply 40 is connected to a power supply terminal of the control chip 20 to supply power to the control chip 20. The base electrode of the first triode Q1 is connected with the main power supply 40 through a first resistor R1, the base electrode of the first triode Q1 is grounded through a second resistor R2, and the emitting electrode of the first triode Q1 is grounded; the base of the second triode Q2 is connected with the standby power supply 50 through a third resistor R3, the base of the second triode Q2 is also connected with the collector of the first triode Q1, the emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is connected with the standby power supply 50 through a fourth resistor R4; the grid of first MOS pipe MOS is connected with the collector of second triode Q2, and the grid of first MOS pipe MOS still passes through fifth resistance R5 ground connection, and the source electrode of first MOS pipe MOS is connected with stand-by power supply 50, and the drain electrode of first MOS pipe MOS is connected with control chip 20's supply end.
The power supply switching circuit 11 can detect the output voltage of the main power supply 40, and when the output voltage of the main power supply 40 is at a high level, the main power supply 40 supplies power to the control chip 20; when the main power supply 40 is powered off, that is, when the output voltage of the main power supply 40 is at a low level, the standby power supply 50 is switched to supply power to the control chip 20.
Specifically, in the above embodiment, when the main power supply 40 supplies power normally, the base voltage of the first transistor Q1 is at a high level, and the first transistor Q1 is turned on; the base voltage of the second triode Q2 is the collector voltage of the first triode Q1, when the first triode Q1 is turned on, the collector voltage of the first triode Q1 is at a low level, and the second triode Q2 is cut off; the gate voltage of the first MOS transistor MOS is the collector voltage of the second triode Q2, the collector voltage of the second triode Q2 is the output voltage of the standby power supply 50 when the second triode Q2 is turned off, and the source voltage of the first MOS transistor MOS is the same as the gate voltage, so that the first MOS transistor MOS is turned off. At this time, the main power supply 40 supplies power normally, and the output terminal of the main power supply 40 is connected to the power supply terminal of the control chip 20 to supply power to the control chip 20.
When the main power source 40 is powered off, in contrast to the above embodiment, the first transistor Q1 is turned off, the second transistor Q2 is turned on, the first MOS transistor MOS is turned on, at this time, the drain voltage of the first MOS transistor MOS is the output voltage of the standby power source 50, and when the main power source 40 is powered off, the standby power source 50 supplies power to the control chip 20 through the first MOS transistor MOS.
By providing the power switching circuit 11, the control chip 20 can be continuously powered by the backup power source 50 when the main power source 40 is powered down, so that the control chip 20 can communicate with the monitoring server through the wireless communication module 30 to send power-down information to the monitoring server.
With continued reference to fig. 2, the power switching circuit 11 may further include a first diode D1 and a second diode D2, wherein the output terminal of the main power source 40 is connected to the anode of the first diode D1, and the power supply terminal of the control chip 20 is connected to the cathode of the first diode D1; the drain of the first MOS transistor MOS is connected to the anode of the second diode D2, and the power supply terminal of the control chip 20 is connected to the cathode of the second diode D2. The output end of the main power source 40 and the drain of the first MOS transistor MOS are connected to the power supply end of the control chip 20 through a first diode D1 and a second diode D2, respectively, so that the power supply voltage of the control chip 20 can be rectified and reverse current is prevented from being generated.
It should be noted that the power supply terminal of the control chip 20 may be a system power supply of the control chip 20, and the power supply switching circuit 11 may control the main power supply 40 or the backup power supply 50 to supply power to the system power supply, so that the control chip 20 can maintain operation.
Preferably, the power switching circuit 11 may further include a backward diode D, an anode of the backward diode D is connected to a drain of the first MOS transistor MOS, a cathode of the backward diode D is connected to a source of the first MOS transistor MOS, and the backward diode D is connected in parallel to the first MOS transistor MOS to prevent the first MOS transistor MOS from being broken down by a reverse induced voltage. It is understood that the first MOS transistor MOS in the above embodiments may be a P-channel enhancement type field effect transistor.
Referring to fig. 1 and 3 together, the power management module 10 in the above embodiment may further include a power detection circuit 12, the power detection circuit 12 includes a voltage detection chip U1, a sixth resistor R6, a seventh resistor R7, a first capacitor C1 and a second capacitor C2., the voltage detection chip U1 is selected as a B L8506-27 CRM type chip, the VDD pin of the voltage detection chip U1 is connected to the main power 40 through the sixth resistor R6, the VDD pin of the voltage detection chip U1 is also grounded through the seventh resistor R7 and grounded through the first capacitor C1, respectively, the VSS pin of the voltage detection chip U1 is grounded, and the VDD pin of the voltage detection chip U1 is grounded through the second capacitor C2, when the main power 40 is normally powered, the VDD pin receives an output voltage of the main power 40, the VOUT pin correspondingly outputs a high level to the control chip 20, when the main power 40 is powered down without outputting a voltage, the VOUT pin receives a low level, the VOUT pin outputs a low level to the control chip 20, and transmits the VOUT pin receives low level information as power down information of the network server monitoring server 40.
Further, in a preferred embodiment, the output terminal of the main power source 40 is connected to the charging input terminal of the backup power source 50 through the power management module 10, and when the main power source 40 is in a normal power supply state, the power management module 10 can charge the backup power source 50 through the output voltage of the main power source 40.
Preferably, in the above embodiment, the first signal receiving terminal of the control chip 20 is connected to the alarm signal terminal of the network camera 60, and the second signal receiving terminal of the control chip 20 is connected to the data transmission terminal of the network camera 60. If the network camera 60 fails to perform network communication due to a network connection failure during a normal operation process, the network camera 60 may send an alarm signal to the control chip 20, and after receiving the alarm signal, the control chip 20 may determine that the network camera 60 fails to perform network communication, and send the type of the network failure to the monitoring server through the wireless communication module 30.
The network camera 60 also transmits preset data to the control chip 20 through the data transmission terminal according to a preset period. The preset data may be heartbeat packet data so that the control chip 20 determines the current operating state of the network camera 60 according to the heartbeat packet data. When the network camera 60 normally operates, the control chip 20 may continuously receive the heartbeat packet data, and when the network camera 60 crashes or has other failures that make it unable to start, the network camera 60 does not send preset data like the control chip 20, so that the control chip 20 may determine that the network camera 60 is in an abnormal state that fails to normally start and operate when the heartbeat packet is not received, thereby sending the failure information to the monitoring server. The monitoring server can determine the fault cause of the network camera 60 from the fault types of power failure of the main power supply 40, network fault or equipment crash and the like when the network camera 60 has a fault through the data information sent by the control chip 20, so that the network camera 60 is repaired and maintained correspondingly, and the stability of the whole operation system of the network camera 60 is improved.
It can be understood that the period of the control chip 20 sending the signal to the monitoring server through the wireless communication module 30 may be once per hour, and the control chip 20 may maintain normal operation for more than one month in a state that the main power source 40 is powered down and the standby power source 50 is powered, so as to provide sufficient time for the network camera 60 to repair and maintain.
Further, the wireless communication module 30 in the above embodiment may be an NB-IoT (Narrow band internet of Things) module, and the NB-IoT module has the characteristics of low power consumption and long standby time, and can maintain long-time communication connection with the monitoring server, so that the service life of the fault detection device of the network camera 60 is effectively prolonged.
The utility model provides a network camera fault detection device, this network camera fault detection device include the network camera fault detection circuit who is connected with the network camera, and above-mentioned embodiment can be referred to this network camera fault detection circuit's structure, no longer gives unnecessary details here. It should be noted that, since the network camera fault detection apparatus of the present embodiment adopts the technical solution of the network camera fault detection circuit, the network camera fault detection apparatus has all the beneficial effects of the network camera fault detection circuit.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. A network camera malfunction detection circuit for detecting a type of malfunction of a network camera, comprising:
the first input end of the power management module is connected with a main power supply, and the second input end of the power management module is connected with a standby power supply;
the power supply end of the control chip is connected with the output end of the power management module, and the signal receiving end of the control chip is connected with the network camera;
the signal input end of the wireless communication module is connected with the signal output end of the control chip;
the power supply management module is used for detecting the power supply state of the main power supply and supplying power to the control chip through the main power supply when the main power supply is in a normal power supply state; when the main power supply is powered off, the standby power supply supplies power to the control chip and sends power-off information to the control chip;
the control chip is used for sending the power failure information to a monitoring server through the wireless communication module when receiving the power failure information;
and the control chip is also used for determining the fault type of the network camera according to the fault signal after receiving the fault signal sent by the network camera, and sending the fault type to the monitoring server through the wireless communication module.
2. The network camera fault detection circuit of claim 1, wherein the power management module includes a power switching circuit; the power supply switching circuit comprises a first triode, a second triode, a first MOS (metal oxide semiconductor) tube, a first resistor, a second resistor, a third resistor and a fourth resistor;
the output end of the main power supply is connected with the power supply end of the control chip;
the base electrode of the first triode is connected with a main power supply through the first resistor, the base electrode of the first triode is grounded through the second resistor, and the emitting electrode of the first triode is grounded; the base electrode of the second triode is connected with a standby power supply through a third resistor, the base electrode of the second triode is also connected with the collector electrode of the first triode, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the standby power supply through a fourth resistor; the grid electrode of the first MOS tube is connected with the collector electrode of the second triode, the grid electrode of the first MOS tube is grounded through a fifth resistor, the source electrode of the first MOS tube is connected with a standby power supply, and the drain electrode of the first MOS tube is connected with the power supply end of the control chip;
the power supply switching circuit is used for detecting the output voltage of a main power supply and supplying power to the control chip through the main power supply when the output voltage of the main power supply is at a high level; and when the output voltage of the main power supply is at a low level, the standby power supply supplies power to the control chip.
3. The network camera fault detection circuit of claim 2, wherein the power switching circuit further comprises a first diode and a second diode;
the output end of the main power supply is connected with the power supply end of the control chip through the first diode, the anode of the first diode is connected with the output end of the main power supply, and the cathode of the first diode is connected with the power supply end of the control chip;
the drain electrode of the first MOS tube is connected with the power supply end of the control chip through the second diode, the anode of the second diode is connected with the drain electrode of the first MOS tube, and the cathode of the second diode is connected with the power supply end of the control chip.
4. The network camera fault detection circuit as claimed in claim 2, wherein the power switching circuit further comprises a reverse diode, an anode of the reverse diode is connected with the drain of the first MOS transistor, and a cathode of the reverse diode is connected with the source of the first MOS transistor.
5. The network camera fault detection circuit of claim 2, wherein the first MOS transistor is a P-channel enhancement mode field effect transistor.
6. The network camera fault detection circuit of claim 2, wherein the power management module further comprises a power detection circuit, the power detection circuit comprises a voltage detection chip, a sixth resistor, a seventh resistor, a first capacitor and a second capacitor, the voltage detection chip is B L8506-27 CRM type;
the VDD pin of the voltage detection chip is connected with a main power supply through a fifth resistor, the VDD pin of the voltage detection chip is grounded through a sixth resistor and a first capacitor respectively, the VSS pin of the voltage detection chip is grounded, and the VOUT pin of the voltage detection chip is grounded through a second capacitor;
the voltage detection chip is used for controlling the VOUT pin to output a high level to the control chip when the VDD pin receives the output voltage of a main power supply; when the VDD pin does not receive the output voltage of a main power supply, controlling the VOUT pin to output a low level to the control chip;
and the control chip is used for sending power failure information to a monitoring server through the wireless communication module when receiving the low level output by the VOUT pin.
7. The network camera fault detection circuit of claim 1, wherein the output of the primary power supply is connected to the charging input of the backup power supply through the power management module;
the power supply management module is further used for charging the standby power supply through the main power supply when the main power supply is in a normal power supply state.
8. The network camera fault detection circuit according to any one of claims 1 to 7, wherein a first signal receiving terminal of the control chip is connected to an alarm signal terminal of the network camera, and a second signal receiving terminal of the control chip is connected to a data transmission terminal of the network camera;
the control chip is used for sending the fault type corresponding to the alarm signal to the monitoring server through the wireless communication module when receiving the alarm signal sent by the alarm signal end of the network camera;
the control chip is also used for determining that the network camera is in a normal working state when receiving preset data sent by a data transmission end of the network camera according to a preset period; when preset data sent by a data transmission end of the network camera according to a preset period is not received, the network camera is determined to be in an abnormal state, and fault information corresponding to the abnormal state is sent to a monitoring server through the wireless communication module.
9. The network camera failure detection circuit of any of claims 1-7, wherein the wireless communication module is a narrowband internet of things (NB-IoT) module.
10. A network camera malfunction detection apparatus, characterized in that the network camera malfunction detection apparatus comprises a network camera malfunction detection circuit connected to a network camera, the network camera malfunction detection circuit being configured as the network camera malfunction detection circuit according to any one of claims 1 to 9.
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| CN201921418735.0U CN211086558U (en) | 2019-08-28 | 2019-08-28 | Network camera fault detection circuit and device |
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| CN201921418735.0U CN211086558U (en) | 2019-08-28 | 2019-08-28 | Network camera fault detection circuit and device |
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| CN211086558U true CN211086558U (en) | 2020-07-24 |
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| CN (1) | CN211086558U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019746A (en) * | 2020-08-31 | 2020-12-01 | 广州中科智巡科技有限公司 | Camera intelligent battery remote control system and method |
| CN112653207A (en) * | 2020-11-20 | 2021-04-13 | 浪潮电子信息产业股份有限公司 | Power supply circuit and method for BMC |
| CN112650087A (en) * | 2020-08-27 | 2021-04-13 | 合肥恒烁半导体有限公司 | Power supply control circuit of MCU chip |
| CN112653205A (en) * | 2020-10-09 | 2021-04-13 | 合肥恒烁半导体有限公司 | Vehicle-mounted mobile phone charger output protection circuit controlled by MCU chip |
| CN113612200A (en) * | 2021-07-30 | 2021-11-05 | 中汽创智科技有限公司 | Charging protection device for integrated brake system and vehicle |
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2019
- 2019-08-28 CN CN201921418735.0U patent/CN211086558U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650087A (en) * | 2020-08-27 | 2021-04-13 | 合肥恒烁半导体有限公司 | Power supply control circuit of MCU chip |
| CN112650087B (en) * | 2020-08-27 | 2022-05-27 | 恒烁半导体(合肥)股份有限公司 | Power supply control circuit of MCU chip |
| CN112019746A (en) * | 2020-08-31 | 2020-12-01 | 广州中科智巡科技有限公司 | Camera intelligent battery remote control system and method |
| CN112653205A (en) * | 2020-10-09 | 2021-04-13 | 合肥恒烁半导体有限公司 | Vehicle-mounted mobile phone charger output protection circuit controlled by MCU chip |
| CN112653207A (en) * | 2020-11-20 | 2021-04-13 | 浪潮电子信息产业股份有限公司 | Power supply circuit and method for BMC |
| CN113612200A (en) * | 2021-07-30 | 2021-11-05 | 中汽创智科技有限公司 | Charging protection device for integrated brake system and vehicle |
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