CN211321412U

CN211321412U - Video recorder

Info

Publication number: CN211321412U
Application number: CN201921707600.6U
Authority: CN
Inventors: 孙亮
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-08-21
Anticipated expiration: 2029-10-12

Abstract

The application provides a video recorder, which comprises a video recorder mainboard, an ATX power supply, a storage battery, a power supply management circuit and an ATX power supply detection circuit; the output end of the ATX power supply is respectively connected with the input end of the ATX power supply detection circuit and the power supply management circuit; the power supply management circuit is respectively connected with the storage battery, the output end of the ATX power supply detection circuit and the video recorder mainboard; the ATX power supply is used for converting alternating current received by the input end of the ATX power supply into preset multi-path direct current; the ATX power supply detection circuit is used for detecting whether the multi-path direct current output by the ATX power supply meets a preset alarm condition and outputting a first voltage signal indicating whether the input end of the ATX power supply is powered off; the power management circuit is used for controlling the storage battery to provide preset multi-path direct current for the video recorder mainboard when the first voltage signal indicates that the input end of the ATX power supply is powered off. By adopting the method and the device, the normal operation of the video recorder can be ensured under the condition that the input end of the ATX power supply is powered off.

Description

Video recorder

Technical Field

The application relates to the technical field of video monitoring, in particular to a video recorder.

Background

At present, a video recorder generally adopts an ATX (Advanced Technology extended ) power supply to supply power, an input end of the ATX power supply is connected with a mains supply (alternating current 220V), an output end of the ATX power supply is connected with a video recorder main board, and the ATX power supply is used for converting the mains supply into preset multi-path direct current to supply power to the video recorder main board. Wherein, the multichannel direct current that predetermines includes: one path of 12V direct current, one path of 5V direct current, one path of standby 5V direct current (which can be called as 5V standby or 5VSB) and one path of 3.3V direct current.

However, in case of a mains outage (i.e. the input of the ATX power supply is powered down), the video recorder will stop running.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a video recorder, can guarantee video recorder normal operating under the input outage circumstances of ATX power. The specific technical scheme is as follows:

a video recorder comprises a video recorder mainboard, an ATX power supply, a storage battery, a power supply management circuit and an ATX power supply detection circuit;

the output end of the ATX power supply is respectively connected with the input end of the ATX power supply detection circuit and the power supply management circuit;

the output end of the ATX power supply detection circuit is connected with the power supply management circuit;

the power management circuit is respectively connected with the storage battery and the video recorder mainboard;

the ATX power supply is used for converting alternating current received by the input end of the ATX power supply into preset multi-path direct current when the alternating current is input at the input end of the ATX power supply, and providing the preset multi-path direct current for the video recorder mainboard through the power management circuit;

the ATX power supply detection circuit is used for detecting whether the multi-path direct current output by the ATX power supply meets a preset alarm condition; if the multi-path direct current output by the ATX power supply meets a preset alarm condition, outputting a first voltage signal indicating the power failure of the input end of the ATX power supply; otherwise, outputting a first voltage signal indicating that the input end of the ATX power supply is not powered off;

and the power supply management circuit is used for controlling the storage battery to provide the preset multi-path direct current for the video recorder mainboard when the first voltage signal indicating the power-off of the input end of the ATX power supply is detected.

Optionally, the ATX power detection circuit is connected to a start signal receiving terminal of the ATX power, and the start signal receiving terminal of the ATX power is connected to the video recorder motherboard;

the video recorder mainboard is used for providing a starting signal for the ATX power supply;

the ATX power supply detection circuit is specifically used for:

detecting whether the voltage of each circuit of direct current output by the ATX power supply is smaller than a preset reference value corresponding to the circuit of direct current or not;

if the voltage of any direct current in the direct currents output by the ATX power supply is smaller than a preset reference value corresponding to the direct current, and a starting signal receiving end of the ATX power supply receives a voltage signal in a low level state, outputting a first voltage signal indicating that the input end of the ATX power supply is powered off; otherwise, outputting a first voltage signal indicating that the input end of the ATX power supply is not powered off.

Optionally, the ATX power detection circuit includes: a voltage comparator, an AND logic element, and a NOR logic element;

the input end of the voltage comparator is connected with the output end of the ATX power supply, and the output end of the voltage comparator is connected with the AND logic element;

the input end of the NOR logic element is respectively connected with the output end of the AND logic element and the starting signal receiving end of the ATX power supply;

the voltage comparator is used for detecting whether the voltage of each circuit of direct current output by the ATX power supply is smaller than a preset reference value corresponding to the circuit of direct current or not and outputting a detection result signal corresponding to the circuit of direct current, wherein the detection result signal corresponding to the circuit of direct current is in a high level state and indicates that the voltage of the circuit of direct current is not smaller than the preset reference value corresponding to the circuit of direct current, and the detection result signal corresponding to the circuit of direct current is in a low level state and indicates that the voltage of the circuit of direct current is smaller than the preset reference value corresponding to the circuit of direct current;

the AND logic element is used for outputting a second voltage signal in a high level state if the detection result signals corresponding to each circuit of direct current output by the ATX power supply are in the high level state; otherwise, outputting a second voltage signal in a low level state;

the nor logic element is used for outputting a first voltage signal in a high level state if the second voltage signal is in a low level state and a starting signal receiving end of the ATX power supply receives the voltage signal in the low level state; otherwise, outputting the first voltage signal in a low level state.

Optionally, the video recorder motherboard is configured to output a voltage signal in a high level state to a start signal receiving end of the ATX power supply when receiving a shutdown instruction.

Optionally, the preset multipath direct current includes: one path of 12V direct current, one path of 5V direct current, one path of standby 5V direct current and one path of 3.3V direct current;

the power management circuit includes: a battery management circuit and a DC/DC circuit;

the storage battery management circuit is respectively connected with a 12V direct current output end of the ATX power supply, an output end of the ATX power supply detection circuit, the video recorder mainboard, the storage battery and an input end of the DC/DC circuit;

the control end of the DC/DC circuit is connected with the output end of the ATX power supply detection circuit, and the output end of the DC/DC circuit is connected with the video recorder mainboard;

the storage battery management circuit is used for outputting 12V direct current to the video recorder mainboard and the DC/DC circuit according to the 12V direct current of the storage battery when the 12V direct current output end of the ATX power supply does not output 12V direct current and the first voltage signal indicates that the input end of the ATX power supply is powered off;

and the DC/DC circuit is used for converting the 12V direct current output by the storage battery into a path of 5V direct current, a path of standby 5V direct current and a path of 3.3V direct current when the first voltage signal indicates that the input end of the ATX power supply is powered off, and outputting the direct current to the video recorder mainboard.

Optionally, the power management circuit further includes a first controllable switch, a second controllable switch, and a first diode;

the 5V direct current output end and the 3.3V direct current output end of the ATX power supply are respectively connected with the video recorder mainboard through the first controllable switch and the second controllable switch;

the spare 5V direct current output end of the ATX power supply is connected with the anode of the first diode, and the cathode of the first diode is connected with the video recorder mainboard;

the output end of the ATX power supply detection circuit is respectively connected with the control ends of the first controllable switch and the second controllable switch;

the ATX power supply detection circuit is used for controlling the first controllable switch and the second controllable switch to be conducted when the ATX power supply detection circuit outputs a first voltage signal indicating that the input end of the ATX power supply is not powered off; when the ATX power supply detection circuit outputs a first voltage signal indicating that the input end of the ATX power supply is powered off, the first controllable switch and the second controllable switch are controlled to be turned off;

the power supply management circuit is used for controlling the connection and conduction of the 12V direct current output end of the ATX power supply and the video recorder mainboard when the 12V direct current output end of the ATX power supply outputs 12V direct current; and when the 12V direct current output end of the ATX power supply does not output 12V direct current, controlling the connection of the 12V direct current output end of the ATX power supply and the video recorder mainboard to be switched off.

Optionally, the storage battery management circuit is further configured to control the 12V dc power output by the 12V dc power output of the ATX power supply to charge the storage battery when the 12V dc power output of the ATX power supply outputs 12V dc power and the voltage of the storage battery is smaller than a first preset threshold.

Optionally, the storage battery management circuit is further configured to control the 12V dc output by the ATX power supply to stop charging the storage battery when the 12V dc output end of the ATX power supply outputs 12V dc and the voltage of the storage battery is greater than a second preset threshold, where the second preset threshold is greater than the first preset threshold.

Optionally, the output end of the ATX power detection circuit is connected to the video recorder motherboard;

and the video recorder mainboard is used for sending alarm information indicating the power failure of the input end of the ATX power supply to the alarm receiving equipment when detecting that the first voltage signal indicates the power failure of the input end of the ATX power supply.

Optionally, the video recorder further comprises a spur cancellation circuit and a signal enhancement circuit;

the input end of the burr eliminating circuit is connected with the output end of the ATX power supply detection circuit, and the output end of the burr eliminating circuit is connected with the input end of the signal enhancement circuit;

the output end of the signal enhancement circuit is connected with the video recorder mainboard;

The embodiment of the application provides a video recorder can be under the input outage circumstances of ATX power, by the battery to the power supply of video recorder mainboard, guarantee that the video recorder can normal operating.

Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a video recorder provided in an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating the ATX power detection circuit of FIG. 1 according to one embodiment;

FIG. 3 is a schematic diagram illustrating a configuration of a battery management circuit of FIG. 1 according to one embodiment;

FIG. 4 is a schematic diagram illustrating a configuration of one of the battery management circuits of FIG. 3, according to one embodiment;

fig. 5 is a schematic structural diagram of a burr removing circuit and a signal enhancing circuit according to an embodiment of the present application.

Description of the figures

1. Video recorder mainboard 2, ATX power

3. Storage battery 4 and power supply management circuit

5. ATX power supply detection circuit 9 and burr elimination circuit

10. Signal enhancement circuit 41 and battery management circuit

42. DC/DC circuit 43, first controllable switch

44. A first diode 45, a second controllable switch

46. Second diode 47, third diode

48. Fourth diode 51, voltage comparator

52. AND logic element 53, or NOR logic element

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a video recorder, can be under the input outage circumstances of ATX power, guarantee that the video recorder can normal operating by the battery to the power supply of video recorder mainboard.

Referring to fig. 1, the video recorder comprises a video recorder mainboard 1, an ATX power supply 2, a storage battery 3, a power supply management circuit 4 and an ATX power supply detection circuit 5;

the output end of the ATX power supply 2 is respectively connected with the input end of the ATX power supply detection circuit 5 and the power supply management circuit 4; the output end of the ATX power supply detection circuit 5 is connected with the power supply management circuit 4; the power management circuit 4 is respectively connected with the storage battery 3 and the video recorder mainboard 1;

the ATX power supply 2 is used for converting alternating current received by the input end of the ATX power supply 2 into preset multi-path direct current when the alternating current is input at the input end of the ATX power supply 2, and providing the preset multi-path direct current for the video recorder mainboard 1 through the power management circuit 4;

the ATX power supply detection circuit 5 is used for detecting whether the multi-path direct current output by the ATX power supply 2 meets a preset alarm condition; if the multi-path direct current output by the ATX power supply 2 meets the preset alarm condition, outputting a first voltage signal indicating the power failure of the input end of the ATX power supply 2; otherwise, outputting a first voltage signal indicating that the input end of the ATX power supply 2 is not powered off;

and the power management circuit 4 is used for controlling the storage battery 3 to provide preset multi-path direct current for the video recorder mainboard 1 when the first voltage signal indicates that the input end of the ATX power supply 2 is powered off.

Wherein, the multichannel direct current that predetermines includes: one path of 12V direct current, one path of 5V direct current, one path of standby 5V direct current and one path of 3.3V direct current.

In the embodiment of the application, when the input end of the ATX power supply 2 has the ac input, the ATX power supply 2 converts the ac received by the input end of the ATX power supply 2 into one path of 12V dc, one path of 5V dc, one path of standby 5V dc, and one path of 3.3V dc, and outputs the ac to the video recorder motherboard 1 through the power management circuit 4.

In practical applications, a power failure of the input terminal of the ATX power supply 2 may occur, and when the input terminal of the ATX power supply 2 is powered off, the ATX power supply 2 cannot supply power to the main board 1 of the video recorder, that is, the video recorder is powered off. It is therefore necessary to detect whether the input of the ATX supply 2 is powered down, so that the video recorder board 1 is supplied with power from the battery 3 when the input of the ATX supply 2 is powered down. The specific process is as follows:

the ATX power supply detection circuit 5 can detect whether the multi-path direct current output by the ATX power supply 2 meets a preset alarm condition; if the multi-path direct current output by the ATX power supply 2 meets the preset alarm condition, outputting a first voltage signal indicating the power failure of the input end of the ATX power supply 2; otherwise, a first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off is output. The first voltage signal indicating that the input terminal of the ATX power supply 2 is powered off may be a voltage signal in a high state, and the first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off may be a voltage signal in a low state.

When the ATX power supply detection circuit 5 outputs a first voltage signal indicating that the input end of the ATX power supply 2 is not powered off, the ATX power supply 2 can supply power to the video recorder mainboard 1, and the storage battery 3 does not need to be switched to supply power to the video recorder mainboard 1. When the ATX power detection circuit 5 outputs a first voltage signal indicating the power failure of the input end of the ATX power supply 2, the ATX power supply 2 cannot supply power to the video recorder mainboard 1, and the first voltage signal indicating the power failure of the input end of the ATX power supply 2 can drive the power management circuit to control the storage battery 3 to provide one path of 12V direct current, one path of 5V direct current, one path of standby 5V direct current and one path of 3.3V direct current for the video recorder mainboard 1.

Compare in prior art, this application can be under the input outage circumstances of ATX power 2, by the battery 3 to the power supply of video recorder mainboard 1, guarantees that the video recorder can normal operating.

Optionally, the ATX power detection circuit 5 is connected to a start signal receiving end of the ATX power supply 2; and the start signal receiving end of the ATX power supply 2 is connected with the video recorder mainboard 1, and the video recorder mainboard 1 is used for providing a start signal for the ATX power supply 2. The ATX power supply detection circuit is specifically used for: detecting whether the voltage of each circuit of direct current output by the ATX power supply 2 is smaller than a preset reference value corresponding to the circuit of direct current; if any direct current voltage in the direct current output by the ATX power supply 2 is smaller than a preset reference value corresponding to the direct current and a starting signal receiving end of the ATX power supply 2 receives a voltage signal in a low level state, outputting a first voltage signal indicating the power failure of an input end of the ATX power supply 2; otherwise, a first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off is output.

In the embodiment of the application, when the input end of the ATX power supply 2 has an ac input and the start signal receiving end of the ATX power supply 2 receives a voltage signal in a low level state, the ATX power supply 2 outputs one path of 12V dc, one path of 5V dc, one path of standby 5V dc, and one path of 3.3V dc. When the input end of the ATX power supply 2 has alternating current input and the starting signal receiving end of the ATX power supply 2 inputs a voltage signal in a high level state, the ATX power supply 2 only outputs one path of standby 5V direct current. When the input end of the ATX power supply 2 is powered off, the ATX power supply 2 does not have direct current output.

The ATX power supply detection circuit 5 is respectively connected with a 12V direct current output end, a 5V direct current output end, a standby 5V direct current output end and a 3.3V direct current output end of the ATX power supply 2. For each output terminal of the ATX power supply 2, the ATX power supply detection circuit 5 may detect whether the voltage of the output terminal is smaller than a preset reference value corresponding to the output terminal. Wherein, the preset reference value corresponding to each output end is 0.95 times of the corresponding voltage or is set by technicians according to experience.

If the voltage of any output end in the output end of the ATX power supply 2 is smaller than the preset reference value corresponding to the output end and the starting signal receiving end of the ATX power supply 2 receives the voltage signal in the low level state, the ATX power supply detection circuit 5 outputs a first voltage signal for indicating the power failure of the input end of the ATX power supply 2; otherwise, the ATX power detection circuit 5 outputs a first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off.

Optionally, referring to fig. 2, an embodiment of the present application further provides a schematic structural diagram of an ATX power detection circuit, where the ATX power detection circuit 5 includes: a voltage comparator 51, an and logic element 52, and or a not logic element 53; an input terminal of the voltage comparator 51 is connected to an output terminal of the ATX power supply 2, and an output terminal of the voltage comparator 51 is connected to the and logic element 52; an input terminal of the nor logic element 53 is connected to the output terminal of the and logic element 52, and an input terminal of the nor logic element 53 is connected to the enable signal receiving terminal of the ATX power supply 2.

The voltage comparator 51 is configured to detect, for each path of direct current output by the ATX power supply 2, whether a voltage of the path of direct current is smaller than a preset reference value corresponding to the path of direct current, and output a detection result signal corresponding to the path of direct current, where a high level state of the detection result signal corresponding to the path of direct current indicates that the voltage of the path of direct current is not smaller than the preset reference value corresponding to the path of direct current, and a low level state of the detection result signal corresponding to the path of direct current indicates that the voltage of the path of direct current is smaller than the preset reference value corresponding to the path of direct current.

The and logic element 52 is configured to output a second voltage signal in a high level state if the detection result signal corresponding to each direct current output by the ATX power supply 2 is in the high level state; otherwise, outputting the second voltage signal in a low level state.

A nor logic element 53, configured to output a first voltage signal in a high level state if the second voltage signal is in a low level state and a receiving end of a start signal of the ATX power supply 2 receives the voltage signal in the low level state; otherwise, outputting the first voltage signal in a low level state.

In the embodiment of the application, the first voltage signal can be generated faster through the logic element, and then the power supply state of the ATX power supply 2 can be switched to the power supply state of the video recorder mainboard 1 from the storage battery 3 more quickly under the condition that the input end of the ATX power supply 2 is powered off.

The video recorder mainboard 1 is connected with a starting signal receiving end of an ATX power supply 2, and the video recorder mainboard 1 is used for providing a starting signal for the ATX power supply 2; the video recorder mainboard 1 is used for outputting a voltage signal in a high level state to a starting signal receiving end of the ATX power supply 2 when receiving a shutdown instruction.

In the embodiment of the application, the video recorder main board 1 is provided with a third switch, and the standby 5V direct current receiving terminal of the video recorder main board 1 is connected with the starting signal receiving terminal of the ATX power supply 2 through the third switch.

When the ATX power supply 2 supplies power to the video recorder mainboard 1, a user can input a shutdown instruction to the video recorder mainboard 1, and the video recorder mainboard 1 controls the third switch to be switched on when receiving the shutdown instruction. At this time, the start signal receiving end of the ATX power supply 2 can receive the voltage signal in the high level state, the ATX power supply 2 only outputs the standby 5V direct current, and stops outputting the 12V direct current, the 5V direct current and the 3.3V direct current, at this time, because the start signal receiving end is connected with the voltage signal in the high level state, the ATX power supply detection circuit 5 outputs the first voltage signal indicating that the input end of the ATX power supply 2 is not powered off, the storage battery 3 does not supply power to the video recorder main board 1, the video recorder main board 1 does not have the 12V direct current, the 5V direct current and the 3.3V direct current, and the video recorder is in the soft.

Correspondingly, a user can input a startup instruction to the video recorder mainboard 1 in the soft-off state, and the video recorder mainboard 1 controls the third switch to be turned off when receiving the startup instruction. At this time, the start signal receiving end of the ATX power supply 2 receives the voltage signal in the low level state, the ATX power supply 2 can output 12V direct current, 5V direct current, standby 5V direct current, and 3.3V direct current, and the video recorder is turned on.

Optionally, referring to fig. 3, the power management circuit 4 comprises a first controllable switch 43, a second controllable switch 45 and a first diode 44; the 5V direct current output end and the 3.3V direct current output end of the ATX power supply 2 are respectively connected with the video recorder mainboard 1 through a first controllable switch 43 and a second controllable switch 45; the spare 5V direct current output end of the ATX power supply 2 is connected with the anode of a first diode 44, and the cathode of the first diode 44 is connected with the video recorder mainboard 1; the 12V direct current output end of the ATX power supply 2 is connected with the video recorder mainboard 1 through the power management circuit 4; the output end of the ATX power detection circuit 5 is respectively connected with the control ends of the first controllable switch and the second controllable switch.

In the embodiment of the present application, when the ATX power detection circuit 5 outputs the first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off, the first voltage signal indicating that the input terminal of the ATX power supply 2 is not powered off may control the first controllable switch 43 and the second controllable switch 45 to be turned on, and the ATX power supply 2 may transmit 5V direct current and 3.3V direct current to the video recorder motherboard 1. The ATX power supply 2 can transmit standby 5V direct current to the video recorder mainboard 1 through the first diode 44, the power management circuit 4 can control the 12V direct current output end of the ATX power supply 2 to be connected and conducted with the video recorder mainboard 1 when the 12V direct current output end of the ATX power supply 2 outputs 12V direct current, the 12V direct current output end of the ATX power supply 2 can transmit 12V direct current to the video recorder mainboard 1, namely 12V direct current output by the storage battery management circuit shown in figure 3, and the function that the ATX power supply 2 supplies power to the video recorder mainboard is achieved.

When the ATX power detection circuit 5 outputs a first voltage signal indicating the power failure of the input end of the ATX power supply 2, the storage battery 3 supplies power to the video recorder mainboard 1. The first voltage signal indicating the power failure of the input terminal of the ATX power supply 2 can control the first controllable switch 43 and the second controllable switch 45 to be turned off, so as to prevent the direct current input from the storage battery 3 to the video recorder main board 1 from being transmitted to the output terminal of the ATX power supply 2. The power management circuit 4 can control the connection of the 12V direct current output end of the ATX power supply 2 and the video recorder mainboard 1 to be switched off when the 12V direct current output end of the ATX power supply 2 does not output 12V direct current, and prevent the direct current input from the storage battery 3 to the video recorder mainboard 1 from being transmitted to the output end of the ATX power supply 2. With the one-way conductivity of the first diode 44, the backup 5V dc power supplied from the secondary battery 3 to the video recorder board 1 is prevented from being transmitted to the output terminal of the ATX power supply 2.

Alternatively, referring to fig. 3, the power management circuit 3 includes: a battery management circuit 41 and a DC/DC circuit 42; the storage battery management circuit 41 is respectively connected with the 12V direct current output end of the ATX power supply 2, the output end of the ATX power supply detection circuit 5, the video recorder mainboard 1, the storage battery 3 and the input end of the DC/DC circuit 42; the control terminal of the DC/DC circuit 42 is connected to the output terminal of the ATX power detection circuit 5, and the output terminal of the DC/DC circuit 42 is connected to the video recorder main board 1.

The 5V DC output end, the standby 5V DC output end, and the 3.3V DC output end of the DC/DC circuit 42 may be connected to the video recorder board 1 through the second diode 46, the third diode 47, and the fourth diode 48, respectively, anodes of the second diode 46, the third diode 47, and the fourth diode 48 are connected to the 5V DC output end, the standby 5V DC output end, and the 3.3V DC output end of the DC/DC circuit 42, respectively, and cathodes of the second diode 46, the third diode 47, and the fourth diode 48 are connected to the video recorder board 1, so as to prevent the DC output by the ATX power supply 2 from flowing into the output end of the DC/DC circuit 42 when the ATX power supply 2 supplies power to the video recorder board 1.

In the embodiment of the present application, when the 12V DC output terminal of the ATX power supply 2 does not output 12V DC and the first voltage signal indicates that the input terminal of the ATX power supply 2 is powered off, the storage battery management circuit 41 outputs 12V DC to the video recorder motherboard 1 and the DC/DC circuit 42 according to the 12V DC of the storage battery 3, that is, the 12V DC output by the storage battery management circuit shown in fig. 3. Correspondingly, the DC/DC circuit 42 can convert the 12V DC power output by the storage battery 3 into a path of 5V DC power, a path of standby 5V DC power, and a path of 3.3V DC power under the control of the first voltage signal indicating the power failure of the input terminal of the ATX power supply 2, and output the same to the video recorder main board 1 through the second diode 46, the third diode 47, and the fourth diode 48, respectively.

Among them, referring to fig. 4, the battery management circuit 41 includes: the intelligent battery management system comprises a seventh field-effect tube Q7, an eighth field-effect tube Q8, a battery management chip UV3, a twenty-first resistor RV21, a twentieth resistor RV20, a twenty-sixth resistor RV26, a twenty-seventh resistor RV27, a third inductor L3, a ninth field-effect tube Q9, a twenty-ninth resistor RV29, a thirty resistor RV30 and a first field-effect tube Q1. The model of the battery management chip UV3 can be BQ24172 or other chips similar to the model.

The 12V direct current output end of the ATX power supply 2 is respectively connected with the drain electrode of a seventh field-effect tube Q7 and an OVPSET (power supply input detection) pin of a storage battery management chip UV3, the source electrode of a seventh field-effect tube Q7 is connected with the source electrode of an eighth field-effect tube Q8, the source electrode of the seventh field-effect tube Q7 is connected with one end of a twenty-first resistor RV21, the other end of the twenty-first resistor RV21 is connected with a CMSRC (power supply input control 1) pin of the storage battery management chip UV3, the grid electrode of the seventh field-effect tube Q7 is respectively connected with the grid electrode of the eighth field-effect tube Q8 and one end of a twentieth resistor RV20, the other end of the twentieth resistor RV20 is connected with an ACDRV (power supply input control 2) pin of the storage battery management chip UV3, and the drain electrode of the eighth field-effect tube Q8 is respectively connected with a PVCC0 (charging power supply input 1), Video recorder mainboard 1, twenty-seventh resistor RV27One end of the twenty-seventh resistor RV27 is connected, the other end of the twenty-seventh resistor RV27 is respectively connected with one end of the twenty-sixth resistor RV26 and the grid electrode of the ninth field effect transistor Q9, and the other end of the twenty-sixth resistor RV26 is connected with the storage battery management chip UV3

(battery current output control) pin connection; the battery charging pins SW0 and SW1 of the battery management chip UV3 are connected with the battery 3 through a third inductor L3; the drain electrode of the ninth field effect transistor Q9 is connected with the storage battery 3; the storage battery 3 is connected with one end of a twenty-ninth resistor RV29, the other end of the twenty-ninth resistor RV29 is connected with an FB (battery voltage detection) pin of a storage battery management chip UV3 and one end of a thirty-third resistor RV30, the other end of the thirty-third resistor RV30 is grounded, an AGND (power ground) pin of the storage battery management chip UV3 is grounded, a source of a ninth field-effect transistor Q9 is connected with a drain of a first field-effect transistor Q1, a drain of the first field-effect transistor Q1 is connected with an input end of a DC/DC circuit 42, and a gate of the first field-effect transistor Q1 is connected with an output end of the ATX power detection circuit 5.

When the storage battery management chip UV3 detects that the OVPSET pin is not connected with 12V direct current, the storage battery management chip UV3 outputs voltage signals to control the seventh field-effect tube Q7 and the eighth field-effect tube Q8 to be turned off through the CMSRC pin and the ACDRV pin. The 12V direct current output end of the ATX power supply 2 is disconnected with the video recorder mainboard 1. Meanwhile, the storage battery management chip UV3 passes

The ninth field effect transistor Q9 is controlled to be conducted by the pin output voltage signal, the first field effect transistor Q1 is controlled to be conducted by the first voltage signal indicating the power failure of the input end of the ATX power supply 2, and the storage battery 3 is used for conveying 12V direct current to the video recorder mainboard 1 and the DC/DC circuit 42, namely, the storage battery supplies power to the video recorder mainboard 1.

When the battery management chip UV3 detects that the OVPSET pin is connected with 12V direct current, the battery management chip outputs a voltage signal to control the seventh field-effect tube Q7 and the eighth field-effect tube Q8 to be conducted through the CMSRC pin and the ACDRV pin, and under the condition, the 12V direct current output by the ATX power supply 2 is transmitted to the video recorderThe motherboard 1 is powered. Meanwhile, the storage battery management chip UV3 passes

The pin outputs a voltage signal to control the ninth field effect transistor Q9 to be disconnected, a first voltage signal indicating that the input end of the ATX power supply 2 is not powered off controls the first field effect transistor Q1 to be disconnected, and the storage battery 3 stops supplying 12V direct current to the video recorder mainboard 1 and the DC/DC circuit 42, namely the storage battery stops supplying power to the video recorder mainboard 1. Meanwhile, the 12V dc power output from the ATX power supply 2 may enter the battery management chip UV3 from the PVCC0 pin and the PVCC1 pin of the battery management chip UV 3.

Optionally, the storage battery management circuit 41 is further configured to control the 12V dc power output by the 12V dc power output of the ATX power supply 2 to charge the storage battery 3 when the 12V dc power output by the ATX power supply 2 outputs 12V dc power and the voltage of the storage battery 3 is smaller than a first preset threshold.

In the embodiment of the application, when the battery management chip UV3 detects that the OVPSET pin is connected with the 12V dc, the FB (cell voltage detection) pin of the battery management chip UV3 detects whether the voltage of the battery 3 is smaller than a first preset threshold, if so, it indicates that the electric energy stored in the battery 3 is less, and the battery management chip UV3 charges the battery 3 through the SW0 and SW1 pins of the battery management chip UV3 according to the 12V dc entering from the PVCC0 pin and the PVCC1 pin.

Optionally, the storage battery management circuit 41 is further configured to control the 12V dc power output by the ATX power supply 2 to stop charging the storage battery 3 when the 12V dc power output by the ATX power supply 2 is output and the voltage of the storage battery 3 is greater than a second preset threshold, where the second preset threshold is greater than the first preset threshold.

When the battery management chip UV3 detects that the OVPSET pin is connected with 12V dc, it detects whether the voltage of the battery 3 is greater than a second preset threshold value through an FB (cell voltage detection) pin of the battery management chip UV3, and if so, it indicates that the battery 3 is fully charged, and the battery management chip stops charging the battery 3 through SW0 and SW1 pins of the battery management chip UV 3.

Optionally, the output end of the ATX power detection circuit 5 is connected to the video recorder motherboard 1; and the video recorder mainboard 1 is used for sending alarm information indicating the power failure of the input end of the ATX power supply 2 to the alarm receiving equipment when detecting that the first voltage signal indicates the power failure of the input end of the ATX power supply 2.

In the embodiment of the application, the video recorder mainboard 1 sends the alarm information indicating the power-off of the input end of the ATX power supply 2 to the alarm receiving equipment when detecting that the first voltage signal indicates the power-off of the input end of the ATX power supply 2. Correspondingly, when detecting that the first voltage signal indicates that the input end of the ATX power supply 2 is not powered off, the video recorder mainboard 1 sends a reminding message indicating that the input end of the ATX power supply 2 is not powered off to the alarm receiving equipment. The video recorder motherboard 1 sends information to the alarm receiving device through an ethernet mode, or sends information to the alarm receiving device in other modes, which is not specifically limited in this embodiment of the present application.

Optionally, referring to fig. 5, the video recorder further comprises a spur cancellation circuit 9 and a signal enhancement circuit 10; the input end of the burr eliminating circuit 9 is connected with the output end of the ATX power supply detection circuit 5, and the output end of the burr eliminating circuit 9 is connected with the input end of the signal enhancing circuit 10; the output end of the signal enhancement circuit 8 is connected with the video recorder mainboard 1; and the video recorder mainboard 1 is used for sending alarm information indicating the power failure of the input end of the ATX power supply 2 to the alarm receiving equipment when detecting that the first voltage signal indicates the power failure of the input end of the ATX power supply 2.

In the embodiment of the present application, the glitch elimination circuit 9 is configured to eliminate signal glitches in the first voltage signal, so as to prevent false alarm. The signal enhancement circuit is used for enhancing the signal intensity in the first voltage signal and preventing leakage alarm.

Referring to fig. 5, the glitch elimination circuit 9 includes: a seventeenth resistor RV17, an eighteenth resistor RV18 and a twenty-eighth inductor CV 28. The signal enhancement circuit 10 includes: a sixth field effect transistor Q6 and a forty-fourth resistor RV 44. The output end of the ATX power supply detection circuit 5 is respectively connected with one end of a seventeenth resistor RV17 and one end of an eighteenth resistor RV18, the other end of the eighteenth resistor RV18 is grounded, the other end of the seventeenth resistor RV17 is respectively connected with one end of a twenty-eighth inductor CV28 and the grid of a sixth field-effect tube Q6, the other end of the twenty-eighth capacitor CV28 is grounded, the source of the sixth field-effect tube Q6 is grounded, the drain of the sixth field-effect tube Q6 is connected with 3.3V direct current through a fourteenth resistor RV44, and the drain of the sixth field-effect tube Q6 is connected with the video recorder main board 1. Wherein, 3.3V direct current is provided by the video recorder mainboard 1.

When the first voltage signal is in a high level state (namely the first voltage signal indicates that the input end of the ATX power supply 2 is powered off), the sixth field effect transistor Q6 is turned on, the video recorder mainboard 1 receives the voltage signal in a low level state, and the video recorder mainboard 1 sends alarm information indicating that the input end of the ATX power supply 2 is powered off to the alarm receiving device. When the first voltage signal is in a low level state (that is, the first voltage signal indicates that the input end of the ATX power supply 2 is not powered off), the sixth field effect transistor Q6 is turned off, the video recorder motherboard 1 receives the voltage signal in the high level state, and the video recorder motherboard 1 sends indication information indicating that the input end of the ATX power supply 2 is not powered off to the alarm receiving device. The video recorder motherboard 1 sends information to the alarm receiving device through an ethernet mode, or sends information to the alarm receiving device in other modes, which is not specifically limited in this embodiment of the present application.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A video recorder is characterized by comprising a video recorder mainboard (1), an ATX power supply (2), a storage battery (3), a power supply management circuit (4) and an ATX power supply detection circuit (5);

the output end of the ATX power supply (2) is respectively connected with the input end of the ATX power supply detection circuit (5) and the power supply management circuit (4);

the output end of the ATX power supply detection circuit (5) is connected with the power supply management circuit (4);

the power supply management circuit (4) is respectively connected with the storage battery (3) and the video recorder mainboard (1);

the ATX power supply (2) is used for converting alternating current received by the input end of the ATX power supply (2) into preset multi-path direct current when alternating current is input to the input end of the ATX power supply (2), and providing the preset multi-path direct current for the video recorder mainboard (1) through the power management circuit (4);

the ATX power supply detection circuit (5) is used for detecting whether the multi-path direct current output by the ATX power supply (2) meets a preset alarm condition; if the multi-path direct current output by the ATX power supply (2) meets a preset alarm condition, outputting a first voltage signal indicating that the input end of the ATX power supply (2) is powered off; otherwise, outputting a first voltage signal indicating that the input terminal of the ATX power supply (2) is not powered off;

and the power supply management circuit (4) is used for controlling the storage battery (3) to provide the preset multi-path direct current for the video recorder mainboard (1) when the first voltage signal indicates that the input end of the ATX power supply (2) is powered off.

2. The video recorder according to claim 1, wherein the ATX power detection circuit (5) is connected to a start signal receiving terminal of the ATX power supply (2), and the start signal receiving terminal of the ATX power supply (2) is connected to the video recorder main board (1);

the video recorder mainboard (1) is used for providing a starting signal for the ATX power supply (2);

the ATX power supply detection circuit (5) is specifically used for:

aiming at each circuit of direct current output by the ATX power supply (2), detecting whether the voltage of the circuit of direct current is smaller than a preset reference value corresponding to the circuit of direct current;

if any direct current voltage in the direct current output by the ATX power supply (2) is smaller than a preset reference value corresponding to the direct current and a starting signal receiving end of the ATX power supply (2) receives a voltage signal in a low level state, outputting a first voltage signal indicating that the input end of the ATX power supply (2) is powered off; otherwise, a first voltage signal indicating that the input of the ATX power supply (2) is not powered off is output.

3. The video recorder according to claim 2, wherein the ATX power supply detection circuit (5) comprises: a voltage comparator (51), an AND logic element (52), and/or a NOT logic element (53);

the input end of the voltage comparator (51) is connected with the output end of the ATX power supply (2), and the output end of the voltage comparator (51) is connected with the AND logic element (52);

the input end of the NOR logic element (53) is respectively connected with the output end of the AND logic element (52) and the starting signal receiving end of the ATX power supply (2);

the voltage comparator (51) is configured to detect, for each circuit of direct current output by the ATX power supply (2), whether a voltage of the circuit of direct current is smaller than a preset reference value corresponding to the circuit of direct current, and output a detection result signal corresponding to the circuit of direct current, where a high level state of the detection result signal corresponding to the circuit of direct current indicates that the voltage of the circuit of direct current is not smaller than the preset reference value corresponding to the circuit of direct current, and a low level state of the detection result signal corresponding to the circuit of direct current indicates that the voltage of the circuit of direct current is smaller than the preset reference value corresponding to the circuit of direct current;

the AND logic element (52) is used for outputting a second voltage signal in a high level state if the detection result signals corresponding to each circuit of direct current output by the ATX power supply (2) are in the high level state; otherwise, outputting a second voltage signal in a low level state;

the NOR logic element (53) is used for outputting a first voltage signal in a high level state if the second voltage signal is in a low level state and a starting signal receiving end of the ATX power supply (2) receives the voltage signal in the low level state; otherwise, outputting the first voltage signal in a low level state.

4. The video recorder according to claim 2, wherein the video recorder motherboard (1) is configured to output a voltage signal in a high state to a start signal receiving terminal of the ATX power supply (2) upon receiving a shutdown instruction.

5. The video recorder according to claim 1, wherein the predetermined multiple direct current comprises: one path of 12V direct current, one path of 5V direct current, one path of standby 5V direct current and one path of 3.3V direct current;

the power management circuit (4) comprises: a battery management circuit (41) and a DC/DC circuit (42);

the storage battery management circuit (41) is respectively connected with a 12V direct current output end of the ATX power supply (2), an output end of the ATX power supply detection circuit (5), the video recorder main board (1), the storage battery (3) and an input end of the DC/DC circuit (42);

the control end of the DC/DC circuit (42) is connected with the output end of the ATX power supply detection circuit (5), and the output end of the DC/DC circuit (42) is connected with the video recorder mainboard (1);

the storage battery management circuit (41) is used for outputting 12V direct current to the video recorder mainboard (1) and the DC/DC circuit (42) according to the 12V direct current of the storage battery (3) when the 12V direct current output end of the ATX power supply (2) does not output 12V direct current and the first voltage signal indicates that the input end of the ATX power supply (2) is powered off;

and the DC/DC circuit (42) is used for converting the 12V direct current output by the storage battery (3) into a path of 5V direct current, a path of standby 5V direct current and a path of 3.3V direct current when the first voltage signal indicates that the input end of the ATX power supply (2) is powered off, and outputting the direct currents to the video recorder mainboard (1).

6. A video recorder according to claim 5, characterized in that the power management circuit (4) further comprises a first controllable switch (43), a second controllable switch (45) and a first diode (44);

the 5V direct current output end and the 3.3V direct current output end of the ATX power supply (2) are respectively connected with the video recorder mainboard (1) through the first controllable switch (43) and the second controllable switch (45);

the spare 5V direct current output end of the ATX power supply (2) is connected with the anode of the first diode (44), and the cathode of the first diode (44) is connected with the video recorder mainboard (1);

the output end of the ATX power supply detection circuit (5) is respectively connected with the control ends of the first controllable switch (43) and the second controllable switch (45);

the ATX power supply detection circuit (5) is used for controlling the first controllable switch (43) and the second controllable switch (45) to be conducted when the ATX power supply detection circuit (5) outputs a first voltage signal indicating that the input end of the ATX power supply (2) is not powered off; controlling the first controllable switch (43) and the second controllable switch (45) to turn off when the ATX power supply detection circuit (5) outputs a first voltage signal indicating that the input end of the ATX power supply (2) is powered off;

the power supply management circuit (4) is used for controlling the connection and conduction of a 12V direct current output end of the ATX power supply (2) and the video recorder mainboard (1) when the 12V direct current output end of the ATX power supply (2) outputs 12V direct current; and when the 12V direct current output end of the ATX power supply (2) does not output 12V direct current, controlling the connection of the 12V direct current output end of the ATX power supply (2) and the video recorder mainboard (1) to be switched off.

7. The video recorder according to claim 5, wherein the battery management circuit (41) is further configured to control the 12 VDC output from the 12 VDC output of the ATX power supply (2) to charge the battery (3) when the 12 VDC output of the ATX power supply (2) outputs 12 VDC and the voltage of the battery (3) is less than a first preset threshold.

8. The video recorder according to claim 7, wherein the battery management circuit (41) is further configured to control the 12V DC power output by the ATX power supply (2) to stop charging the battery (3) when the 12V DC power output of the ATX power supply (2) outputs 12V DC power and the voltage of the battery (3) is greater than a second preset threshold, wherein the second preset threshold is greater than the first preset threshold.

9. The video recorder according to any of the claims 1 to 8, characterized in that the output of the ATX power detection circuit (5) is connected to the video recorder motherboard (1);

the video recorder mainboard (1) is used for sending alarm information indicating the power failure of the input end of the ATX power supply (2) to alarm receiving equipment when detecting that the first voltage signal indicates the power failure of the input end of the ATX power supply (2).

10. The video recorder according to any of the claims 1 to 8, characterized in that the video recorder further comprises a spur cancellation circuit (9) and a signal enhancement circuit (10);

the input end of the burr removing circuit (9) is connected with the output end of the ATX power supply detection circuit (5), and the output end of the burr removing circuit (9) is connected with the input end of the signal enhancement circuit (10);

the output end of the signal enhancement circuit (10) is connected with the video recorder mainboard (1);