A video conference system and its slow start circuit

Abstract

The present invention discloses a video conferencing system and a slow start circuit thereof, and relates to the technical field of system power supply, wherein the video conferencing system comprises an AC detection module, which is used to detect the positive and negative half-cycles of the AC power connected to the power module; an intelligent control module, which is used for signal reception and module control; a slow start module, which is used for rectification, current limiting, slow voltage boosting, surge suppression and filtering; a bypass control module, which is used to set the timing time, directly transmit the AC power to the video conferencing module and stop the discharge of the power processing module; the power processing module, which is used for energy storage and current zero-crossing processing; an auxiliary power supply module, which is used for energy storage and voltage boosting power supply; a video conferencing module, which is used for rectification, filtering and power supply for the connected video conferencing system equipment. The video conferencing system and the slow start circuit thereof of the present invention can perform slow voltage boosting and surge suppression, and after the slow start is completed, current zero-crossing processing and auxiliary power supply are performed to improve the safety of power transmission and ensure power supply efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of system power supply, in particular to a video conference system and a slow start circuit thereof. Background Art

[0002] Video conferencing system refers to a system device that enables two or more individuals or groups in different places to transmit sound, images and file data to each other through transmission lines and multimedia equipment to achieve instant and interactive communication and realize remote conferencing. As the integration of electronic equipment including video conferencing systems becomes higher and higher, higher and higher requirements are placed on the power supply of system equipment. In order to avoid the input power of system equipment exceeding the instantaneous impact power that can be tolerated when the power is started, the system equipment for realizing remote conferencing in the prior art generally adopts a slow start circuit composed of relays, current limiting resistors and thyristors to absorb the instantaneous impact power at startup and slowly perform voltage boost control to ultimately provide a safe power supply environment. However, after the relay is slowly started after the system equipment is completed, due to the current at the load, when the relay is closed, due to the inability to reasonably control the voltage and current size and the transmission state of the power, an arc may occur, resulting in the inability to safely control the closing state of the relay, which poses certain safety hazards. Low voltage or power failure may also occur, reducing the power supply efficiency, so it needs to be improved. Summary of the invention

[0003] The embodiment of the present invention provides a video conferencing system and a slow start circuit thereof to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a video conferencing system is provided, comprising: a power supply module, an AC detection module, an intelligent control module, a slow start module, a bypass control module, an electric energy processing module, an auxiliary power supply module and a video conferencing module;

[0005] A power module, used to access AC power;

[0006] An AC detection module, connected to the power module, for detecting the positive half cycle and the negative half cycle of the AC power and outputting a first detection signal and a second detection signal respectively;

[0007] An intelligent control module, connected to the AC detection module, the power processing module, the slow start module, the bypass control module and the auxiliary power supply module, and used to set the slow start time. When the power supply module starts to access the AC power and within the slow start time, when a first detection signal is received, a first pulse signal is output to control the operation of the slow start module. When a second detection signal is received, a second pulse signal is output to control the operation of the slow start module and the energy storage operation of the power processing module. After the slow start time ends, a first control signal is output to control the power transmission operation of the bypass control module and the discharge operation of the power processing module, and a third pulse signal is output to control the discharge operation of the auxiliary power supply module.

[0008] A slow start module is connected to the power module, and is used to receive a first pulse signal and rectify, limit current and slowly increase the voltage of the input positive half-cycle AC power. When receiving a second pulse signal, the module rectify, limit current and slowly increase the voltage of the input negative half-cycle AC power, perform surge suppression and filtering on the power after the slow increase and output the first power.

[0009] A bypass control module is connected to the power module and the video conferencing module, and is used to set the timing time, and when receiving the first control signal, starts the timing work, and after the timing ends, outputs the second control signal, and directly transmits the AC power connected to the power module to the video conferencing module, and stops the discharge work of the power processing module;

[0010] An electric energy processing module is connected to the slow start module and the bypass control module, and is used to store the electric energy after rectification by the slow start module when receiving the second pulse signal, discharge and perform current zero-crossing processing on the bypass control module when receiving the first control signal, and stop the discharge work when receiving the second control signal;

[0011] an auxiliary power supply module, connected to the slow start module, and used to store the electric energy after rectification by the slow start module, and when receiving the third pulse signal, release the stored electric energy and perform voltage boost processing on the released electric energy, and output the second electric energy;

[0012] The video conferencing module is connected to the soft start module and the auxiliary power supply module, and is used to rectify and filter the first electric energy or the AC electric energy transmitted by the bypass control module and provide electric energy for the connected video conferencing system equipment, and to filter the second electric energy and provide electric energy for the connected video conferencing system equipment.

[0013] As a further solution of the present invention: the power module includes an input interface; the AC detection module includes a first resistor, a first optical coupler, a first power supply, a second resistor, a third resistor, a fourth resistor and a second optical coupler; the intelligent control module includes a first controller;

[0014] Preferably, the first end of the input interface is connected to one end of the first resistor and one end of the third resistor, the first end of the first optocoupler is connected to the other end of the first resistor, the second end of the second optocoupler is connected to the other end of the third resistor, the second end of the first optocoupler, the first end of the second optocoupler and the second end of the input interface are all grounded, the third end of the first optocoupler and the third end of the second optocoupler are both connected to the first power supply, the fourth end of the first optocoupler is connected to the IO1 end of the first controller and is grounded through the second resistor, and the fourth end of the second optocoupler is connected to the IO2 end of the first controller and is grounded through the fourth resistor.

[0015] As a further solution of the present invention: the slow start module includes a first diode, a second diode, a first thyristor, a second thyristor, a fifth resistor, a first inductor, a second capacitor, a sixth resistor, a third capacitor and a second inductor;

[0016] Preferably, the cathode of the first diode is connected to the anode of the second diode and the first end of the input interface, the anode of the first diode is connected to the power processing module and the cathode of the first thyristor, the cathode of the second diode is connected to the auxiliary power supply module and the anode of the second thyristor, the cathode of the second thyristor is connected to the anode of the first thyristor and connected to the first end of the first inductor through the fifth resistor, the second end of the first inductor is connected to one end of the second capacitor and one end of the third capacitor, the other end of the second capacitor is grounded through the sixth resistor, the other end of the third capacitor is grounded through the second inductor, the control end of the first thyristor is connected to the IO3 end of the first controller, and the control end of the second thyristor is connected to the IO4 end of the first controller.

[0017] As a further solution of the present invention: the bypass control module includes a first relay switch; the video conferencing module includes a first rectifier, a fourth capacitor and a system device interface;

[0018] Preferably, the moving end of the first relay switch is connected to the first end of the input interface, the fixed end of the first relay switch is connected to the first end of the first rectifier and the second end of the first inductor, the second end of the first rectifier is grounded, the third end of the first rectifier is connected to one end of the fourth capacitor and the first end of the system equipment interface, and the fourth end of the first rectifier and the second end of the system equipment interface are both grounded.

[0019] As a further solution of the present invention: the auxiliary power supply module includes a first capacitor and a boost device;

[0020] Preferably, the first end of the first capacitor is connected to the cathode of the second diode and the first input end of the boost device, the second end of the first capacitor is connected to the second input end of the boost device and the ground, the control end of the boost device is connected to the IO5 end of the first controller, the first output end of the boost device is connected to the third end of the first rectifier, and the second output end of the boost device is connected to the fourth end of the first rectifier.

[0021] As a further solution of the present invention: the power processing module includes a third thyristor, a seventh resistor, a fifth capacitor, a fourth thyristor, an eighth resistor and a first switch tube;

[0022] Preferably, the cathode of the third thyristor is connected to the anode of the first diode, the anode of the third thyristor is connected to the cathode of the fourth thyristor and one end of the fifth capacitor, the anode of the fourth thyristor is connected to the fixed end of the first relay switch through the eighth resistor, the control end of the fourth thyristor is connected to the collector of the first switch tube and connected to the IO6 end of the first controller through the seventh resistor, the control end of the third thyristor is connected to the IO3 end of the first controller, the emitter of the first switch tube and the other end of the fifth capacitor are both grounded, and the base of the first switch tube is connected to the bypass control module.

[0023] As a further solution of the present invention: the bypass control module further includes a ninth resistor, a second switch tube, a tenth resistor, a sixth capacitor, an eleventh resistor, a third switch tube, a first relay, a second power supply, a fourth switch tube and a twelfth resistor; the intelligent control module further includes a clock device;

[0024] Preferably, the base of the second switch tube is connected to the IO6 terminal of the first controller through the ninth resistor, the clock device is connected to the IO7 terminal of the first controller, the collector of the second switch tube, the collector of the fourth switch tube and one end of the first relay are all connected to the second power supply, the emitter of the second switch tube is connected to one end of the tenth resistor and one end of the sixth capacitor and is connected to the base of the third switch tube and the base of the fourth switch tube through the eleventh resistor, the collector of the third switch tube is connected to the other end of the first relay, the other end of the tenth resistor, the other end of the sixth capacitor, the emitter of the third switch tube and one end of the twelfth resistor are all grounded, and the emitter of the fourth switch tube is connected to the other end of the twelfth resistor and the base of the first switch tube.

[0025] In addition, a slow start circuit is also provided, and the slow start circuit is applied to the video conferencing system described above.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the video conferencing system and its slow-start circuit of the present invention detect the positive half-cycle and negative half-cycle of the AC power connected to the power module through the AC detection module, and then control the slow-start module through the intelligent control module to perform slow voltage boost processing and surge suppression processing on the input positive half-cycle AC power, and at the same time, the auxiliary power supply module performs energy storage and shunt control, and performs slow voltage boost processing and surge suppression processing on the input negative half-cycle AC power, and at the same time, the power processing module performs energy storage and shunt processing, which can further improve the surge suppression capability and improve the circuit safety, and after the slow-start time ends, delay control of the power transmission of the bypass control module, and during the delay period, the power processing module performs current zero crossing processing on the bypass control module to improve the safety of the power transmission of the bypass control module, and at the same time, the auxiliary power supply module performs voltage boost and provides auxiliary power to the video conferencing module to avoid power outages and ensure power supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 A schematic block diagram of a video conferencing system and a slow start circuit thereof provided by an embodiment of the present invention.

[0029] Figure 2 A circuit diagram of a video conferencing system and a slow start circuit thereof provided in an embodiment of the present invention.

[0030] Figure 3 A circuit diagram of a power processing module provided in an embodiment of the present invention.

[0031] Figure 4 A circuit diagram of a bypass control module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In one embodiment, see Figure 1, a video conferencing system, comprising: a power supply module 1, an AC detection module 2, an intelligent control module 3, a slow start module 4, a bypass control module 5, an electric energy processing module 6, an auxiliary power supply module 7 and a video conferencing module 8;

[0034] Specifically, the power module 1 is used to access AC power;

[0035] An AC detection module 2, connected to the power module 1, for detecting the positive half cycle and the negative half cycle of the AC power and outputting a first detection signal and a second detection signal respectively;

[0036] The intelligent control module 3 is connected with the AC detection module 2, the power processing module 6, the slow start module 4, the bypass control module 5 and the auxiliary power supply module 7, and is used to set the slow start time. When the power supply module 1 starts to access the AC power and within the slow start time, when a first detection signal is received, a first pulse signal is output to control the operation of the slow start module 4, and when a second detection signal is received, a second pulse signal is output to control the operation of the slow start module 4 and the energy storage operation of the power processing module 6. After the slow start time ends, a first control signal is output to control the power transmission operation of the bypass control module 5 and the discharge operation of the power processing module 6, and a third pulse signal is output to control the discharge operation of the auxiliary power supply module 7;

[0037] A slow start module 4 is connected to the power module 1, and is used to receive a first pulse signal and rectify, limit current and slowly increase the voltage of the input positive half-cycle AC power. When receiving a second pulse signal, the input negative half-cycle AC power is rectified, limited current and slowly increased in voltage, surge suppressed and filtered for the slowly increased power, and output the first power.

[0038] The bypass control module 5 is connected to the power module 1 and the video conferencing module 8, and is used to set the timing time, and when receiving the first control signal, starts the timing work, and after the timing ends, outputs the second control signal, and directly transmits the AC power connected to the power module 1 to the video conferencing module 8, and stops the discharge work of the power processing module 6;

[0039] The electric energy processing module 6 is connected to the slow start module 4 and the bypass control module 5, and is used to store the electric energy after rectification by the slow start module 4 when receiving the second pulse signal, discharge and perform current zero-crossing processing on the bypass control module 5 when receiving the first control signal, and stop the discharge work when receiving the second control signal;

[0040] The auxiliary power supply module 7 is connected to the slow start module 4 and is used to store the electric energy after rectification by the slow start module 4. When receiving the third pulse signal, the stored electric energy is released and the released electric energy is boosted to output the second electric energy.

[0041] The video conferencing module 8 is connected to the soft start module 4 and the auxiliary power supply module 7, and is used to rectify and filter the first electric energy or the AC electric energy transmitted by the bypass control module 5 and provide electric energy to the connected video conferencing system equipment, and to filter the second electric energy and provide electric energy to the connected video conferencing system equipment.

[0042] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of an input interface, which can be connected to AC power; the AC detection module 2 can adopt an AC detection circuit composed of a photocoupler, a power supply and a resistor, which can detect the positive half-cycle voltage and the negative half-cycle voltage of the AC power; the intelligent control module 3 can adopt an intelligent control circuit composed of a single-chip microcomputer and a clock device, which can set the slow start time, integrates many components such as an operator, a controller, a memory, and an input and output device, and realizes signal processing, data storage, module control, timing control and other functions; the slow start module 4 can adopt a slow start circuit composed of a diode, a thyristor, an inductor, etc., which can perform current limiting processing, slow voltage boost processing, surge suppression processing and filtering on the input AC power. Wave processing; the bypass control module 5 can adopt a bypass control circuit composed of relays, transistors, resistors, etc., which can perform delay control, control the transmission state of AC power, and control the discharge state of the power processing module 6; the power processing module 6 can adopt a power processing circuit composed of resistors, thyristors, transistors, etc., which can store input power, release the stored power and perform current zero crossing processing on the bypass control module 5; the auxiliary power supply module 7 can adopt capacitors and boost devices, which can store energy and boost the stored power; the video conferencing module 8 can adopt a video conferencing circuit composed of a rectifier, capacitors and system equipment interface, which can rectify and filter the input power, and be connected to the power supply end of the video conferencing system equipment.

[0043] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 , the power module 1 includes an input interface; the AC detection module 2 includes a first resistor R1, a first optical coupler J1, a first power supply VCC1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a second optical coupler J2; the intelligent control module 3 includes a first controller U1;

[0044] Specifically, the first end of the input interface is connected to one end of the first resistor R1 and one end of the third resistor R3, the first end of the first optocoupler J1 is connected to the other end of the first resistor R1, the second end of the second optocoupler J2 is connected to the other end of the third resistor R3, the second end of the first optocoupler J1, the first end of the second optocoupler J2 and the second end of the input interface are all grounded, the third end of the first optocoupler J1 and the third end of the second optocoupler J2 are both connected to the first power supply VCC1, the fourth end of the first optocoupler J1 is connected to the IO1 end of the first controller U1 and is grounded through the second resistor R2, and the fourth end of the second optocoupler J2 is connected to the IO2 end of the first controller U1 and is grounded through the fourth resistor R4.

[0045] In a specific embodiment, the first optocoupler J1 and the second optocoupler J2 can both be PC817 photocouplers, wherein the first optocoupler J1 detects the voltage of the positive half cycle of the AC power, and the second optocoupler J2 detects the voltage of the negative half cycle of the AC power; the first controller U1 can be an STM32 microcontroller.

[0046] Further, the slow start module 4 includes a first diode D1, a second diode D2, a first thyristor S1, a second thyristor S2, a fifth resistor R5, a first inductor L1, a second capacitor C2, a sixth resistor R6, a third capacitor C3 and a second inductor L2;

[0047] Specifically, the cathode of the first diode D1 is connected to the anode of the second diode D2 and the first end of the input interface, the anode of the first diode D1 is connected to the power processing module 6 and the cathode of the first thyristor S1, the cathode of the second diode D2 is connected to the auxiliary power supply module 7 and the anode of the second thyristor S2, the cathode of the second thyristor S2 is connected to the anode of the first thyristor S1 and connected to the first end of the first inductor L1 through the fifth resistor R5, the second end of the first inductor L1 is connected to one end of the second capacitor C2 and one end of the third capacitor C3, the other end of the second capacitor C2 is grounded through the sixth resistor R6, the other end of the third capacitor C3 is grounded through the second inductor L2, the control end of the first thyristor S1 is connected to the IO3 end of the first controller U1, and the control end of the second thyristor S2 is connected to the IO4 end of the first controller U1.

[0048] In a specific embodiment, the first diode D1 and the second diode D2 can both be used for rectification and power transmission processing; the first thyristor S1 and the second thyristor S2 can both be unidirectional thyristors; the fifth resistor R5 is used for current limiting processing; the first inductor L1, the second capacitor C2, the sixth resistor R6, the third capacitor C3 and the second inductor L2 are used for surge suppression and filtering processing.

[0049] Further, the bypass control module 5 includes a first relay switch K1-1; the video conferencing module 8 includes a first rectifier T1, a fourth capacitor C4 and a system device interface;

[0050] Specifically, the moving end of the first relay switch K1-1 is connected to the first end of the input interface, the fixed end of the first relay switch K1-1 is connected to the first end of the first rectifier T1 and the second end of the first inductor L1, the second end of the first rectifier T1 is grounded, the third end of the first rectifier T1 is connected to one end of the fourth capacitor C4 and the first end of the system equipment interface, and the fourth end of the first rectifier T1 and the second end of the system equipment interface are both grounded.

[0051] In a specific embodiment, the first relay switch K1 - 1 may be a normally open switch; and the first rectifier T1 may be a full-wave rectifier.

[0052] Further, the auxiliary power supply module 7 includes a first capacitor C1 and a boost device;

[0053] Specifically, the first end of the first capacitor C1 is connected to the cathode of the second diode D2 and the first input end of the boost device, the second end of the first capacitor C1 is connected to the second input end of the boost device and the ground, the control end of the boost device is connected to the IO5 end of the first controller U1, the first output end of the boost device is connected to the third end of the first rectifier T1, and the second output end of the boost device is connected to the fourth end of the first rectifier T1.

[0054] In a specific embodiment, the first capacitor C1 may be an energy storage capacitor; the voltage boosting device may be composed of a Boost circuit, and the voltage boosting degree is controlled by the IO5 terminal of the first controller U1.

[0055] Furthermore, the power processing module 6 includes a third thyristor S3, a seventh resistor R7, a fifth capacitor C5, a fourth thyristor S4, an eighth resistor R8 and a first switch tube V1;

[0056] Specifically, the cathode of the third thyristor S3 is connected to the anode of the first diode D1, the anode of the third thyristor S3 is connected to the cathode of the fourth thyristor S4 and one end of the fifth capacitor C5, the anode of the fourth thyristor S4 is connected to the fixed end of the first relay switch K1-1 through the eighth resistor R8, the control end of the fourth thyristor S4 is connected to the collector of the first switch tube V1 and connected to the IO6 end of the first controller U1 through the seventh resistor R7, the control end of the third thyristor S3 is connected to the IO3 end of the first controller U1, the emitter of the first switch tube V1 and the other end of the fifth capacitor C5 are both grounded, and the base of the first switch tube V1 is connected to the bypass control module 5.

[0057] In a specific embodiment, the third thyristor S3 and the fourth thyristor S4 can both be unidirectional thyristors, wherein the third thyristor S3 controls the energy storage of the fifth capacitor C5, and the fourth thyristor S4 controls the discharge of the fifth capacitor C5; the fifth capacitor C5 can be an energy storage capacitor; the first switch tube V1 can be an NPN transistor.

[0058] Furthermore, the bypass control module 5 further includes a ninth resistor R9, a second switch tube V2, a tenth resistor R10, a sixth capacitor C6, an eleventh resistor R11, a third switch tube VT3, a first relay K1, a second power supply VCC2, a fourth switch tube V4 and a twelfth resistor R12; the intelligent control module 3 further includes a clock device;

[0059] Specifically, the base of the second switch tube V2 is connected to the IO6 terminal of the first controller U1 through the ninth resistor R9, the clock device is connected to the IO7 terminal of the first controller U1, the collector of the second switch tube V2, the collector of the fourth switch tube V4 and one end of the first relay K1 are all connected to the second power supply VCC2, the emitter of the second switch tube V2 is connected to one end of the tenth resistor R10 and one end of the sixth capacitor C6 and is connected to the base of the third switch tube VT3 and the base of the fourth switch tube V4 through the eleventh resistor R11, the collector of the third switch tube VT3 is connected to the other end of the first relay K1, the other end of the tenth resistor R10, the other end of the sixth capacitor C6, the emitter of the third switch tube VT3 and one end of the twelfth resistor R12 are all grounded, and the emitter of the fourth switch tube V4 is connected to the other end of the twelfth resistor R12 and the base of the first switch tube V1.

[0060] In a specific embodiment, the second switch tube V2, the third switch tube VT3 and the fourth switch tube V4 can all be NPN transistors; the sixth capacitor C6 cooperates with the tenth resistor R10 and the eleventh resistor R11 to set the timing time, and after the timing time is exceeded, the third switch tube VT3 and the fourth switch tube V4 are triggered to turn on; the first relay K1 can control the closing of the first relay switch K1-1 by magnetic attraction; the clock device can use the DS1302 chip.

[0061] In this embodiment, a slow start circuit is also provided. The slow start circuit is applied to the video conferencing system described above.

[0062] In a video conferencing system and a slow start circuit thereof in the present embodiment, an input interface is used to connect AC power, a first optical coupler J1 cooperates with a first resistor R1, a second resistor R2 and a first power supply VCC1 to detect a voltage of a positive half cycle of the AC power, a second optical coupler J2 cooperates with a third resistor R3, a fourth resistor R4 and a first power supply VCC1 to detect a voltage of a negative half cycle of the AC power, a first controller U1 cooperates with a clock device to set a slow start time, i.e., the time required for the slow start operation, within the slow start time, when in a positive half cycle state of the AC power, the AC power is rectified by the second diode D2, and can be stored by the first capacitor C1, and then shunted, and the IO4 terminal of the first controller U1 will control the second thyristor S2 to conduct state, controls the size of the transmitted electric energy, performs a slow voltage boost process, and limits the current by the fifth resistor R5. The first inductor L1 cooperates with the second capacitor C2, the sixth resistor R6, the third capacitor C3 and the second inductor L2 to perform surge suppression and filtering. The processed electric energy is rectified by the first rectifier T1 and the fourth capacitor C4 and then transmitted to the video conferencing system equipment connected to the system equipment interface. When in the negative half-cycle state of the AC electric energy, the AC electric energy is transmitted through the first diode D1. The IO3 end of the first controller U1 simultaneously controls the conduction of the third thyristor S3 and the first thyristor S1. The electric energy will be transmitted to the fifth capacitor C5 through the third thyristor S3 for storage, so that the fifth capacitor C5 stores negative pressure and performs shunting processing. The first controller U 1 controls the conduction state of the first thyristor S1 to perform a slow voltage boost process, and the fifth resistor R5 performs current limiting again. The first inductor L1 cooperates with the second capacitor C2, the sixth resistor R6, the third capacitor C3 and the second inductor L2 to perform surge suppression and filtering. The processed electric energy is transmitted to the video conferencing system equipment connected to the system equipment interface through the first rectifier T1 and the fourth capacitor C4. Until the slow start time is over, the IO6 terminal of the first controller U1 will output the first control signal to control the conduction of the fourth thyristor S4 and the second switch tube V2, and the IO5 terminal of the first controller U1 will output the third pulse signal to control the boosting work of the boosting device, and at the same time stop controlling the conduction of the first thyristor S1 and the second thyristor S2, and the fourth thyristor S4 will The negative pressure released by the fifth capacitor C5 is transmitted so as to perform current zero-crossing processing on the fixed end of the first relay switch K1-1. The boosting device performs voltage boosting processing on the electric energy released by the first capacitor C1. The boosted electric energy is filtered by the fourth capacitor C4 and supplies power to the system equipment interface. The second switch tube V2 is turned on to make the sixth capacitor C6 start to store energy. After the set timing time is exceeded, the third switch tube VT3 and the fourth switch tube V4 are triggered to turn on in conjunction with the tenth resistor R10 and the eleventh resistor R11. At this time, the first relay K1 is energized and controls the first relay switch K1-1 to be closed, and the AC power connected to the power module 1 is directly transmitted to the first rectifier T1 through the first relay switch K1-1. The fourth switch tube V4 controls the fourth thyristor S4 to be turned off.Stop the discharge work of the fifth capacitor C5. When power failure or low voltage occurs, the IO5 terminal of the first controller U1 can also control the boost device to perform boost control to provide short-term power for the system device interface.

[0063] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A video conferencing system, characterized in that: The video conference system includes: a power supply module, an AC detection module, an intelligent control module, a slow start module, a bypass control module, an electric energy processing module, an auxiliary power supply module and a video conference module; The power module is used to access AC power; The AC detection module is connected to the power module and is used to detect the positive half cycle and the negative half cycle of the AC power and output a first detection signal and a second detection signal respectively; The intelligent control module is connected to the AC detection module, the power processing module, the slow start module, the bypass control module and the auxiliary power supply module, and is used to set the slow start time. When the power supply module starts to access the AC power and within the slow start time, when a first detection signal is received, a first pulse signal is output to control the operation of the slow start module. When a second detection signal is received, a second pulse signal is output to control the operation of the slow start module and the energy storage operation of the power processing module. After the slow start time ends, a first control signal is output to control the power transmission operation of the bypass control module and the discharge operation of the power processing module, and a third pulse signal is output to control the discharge operation of the auxiliary power supply module. The slow start module is connected to the power supply module, and is used to receive the first pulse signal and rectify, limit the current and slowly increase the voltage of the input positive half-cycle AC power. When receiving the second pulse signal, the slow start module rectify, limit the current and slowly increase the voltage of the input negative half-cycle AC power, perform surge suppression and filtering on the power after the slow increase and output the first power. The bypass control module is connected to the power module and the video conferencing module, and is used to set the timing time, and when receiving the first control signal, starts the timing work, and after the timing ends, outputs the second control signal, and directly transmits the AC power connected to the power module to the video conferencing module, and stops the discharge work of the power processing module; The electric energy processing module is connected to the slow start module and the bypass control module, and is used to store the electric energy after rectification by the slow start module when receiving the second pulse signal, discharge and perform current zero-crossing processing on the bypass control module when receiving the first control signal, and stop the discharge work when receiving the second control signal; The auxiliary power supply module is connected to the slow start module and is used to store the electric energy after rectification by the slow start module. When receiving the third pulse signal, the stored electric energy is released and the released electric energy is boosted to output the second electric energy. The video conferencing module is connected to the soft start module and the auxiliary power supply module, and is used to rectify and filter the first electric energy or the AC electric energy transmitted by the bypass control module and provide electric energy to the connected video conferencing system equipment, and to filter the second electric energy and provide electric energy to the connected video conferencing system equipment.

2. A video conferencing system according to claim 1, characterized in that: The power supply module includes an input interface; the AC detection module includes a first resistor, a first optical coupler, a first power supply, a second resistor, a third resistor, a fourth resistor and a second optical coupler; the intelligent control module includes a first controller; The first end of the input interface is connected to one end of the first resistor and one end of the third resistor, the first end of the first optocoupler is connected to the other end of the first resistor, the second end of the second optocoupler is connected to the other end of the third resistor, the second end of the first optocoupler, the first end of the second optocoupler and the second end of the input interface are all grounded, the third end of the first optocoupler and the third end of the second optocoupler are all connected to the first power supply, the fourth end of the first optocoupler is connected to the IO1 end of the first controller and is grounded through the second resistor, and the fourth end of the second optocoupler is connected to the IO2 end of the first controller and is grounded through the fourth resistor.

3. A video conferencing system according to claim 2, characterized in that: The soft start module includes a first diode, a second diode, a first thyristor, a second thyristor, a fifth resistor, a first inductor, a second capacitor, a sixth resistor, a third capacitor and a second inductor; The cathode of the first diode is connected to the anode of the second diode and the first end of the input interface, the anode of the first diode is connected to the power processing module and the cathode of the first thyristor, the cathode of the second diode is connected to the auxiliary power supply module and the anode of the second thyristor, the cathode of the second thyristor is connected to the anode of the first thyristor and connected to the first end of the first inductor through the fifth resistor, the second end of the first inductor is connected to one end of the second capacitor and one end of the third capacitor, the other end of the second capacitor is grounded through the sixth resistor, the other end of the third capacitor is grounded through the second inductor, the control end of the first thyristor is connected to the IO3 end of the first controller, and the control end of the second thyristor is connected to the IO4 end of the first controller.

4. A video conferencing system according to claim 3, characterized in that: The bypass control module includes a first relay switch; the video conferencing module includes a first rectifier, a fourth capacitor and a system device interface; The moving end of the first relay switch is connected to the first end of the input interface, the fixed end of the first relay switch is connected to the first end of the first rectifier and the second end of the first inductor, the second end of the first rectifier is grounded, the third end of the first rectifier is connected to one end of the fourth capacitor and the first end of the system equipment interface, and the fourth end of the first rectifier and the second end of the system equipment interface are both grounded.

5. A video conferencing system according to claim 4, characterized in that: The auxiliary power supply module includes a first capacitor and a boost device; The first end of the first capacitor is connected to the cathode of the second diode and the first input end of the boost device, the second end of the first capacitor is connected to the second input end of the boost device and the ground, the control end of the boost device is connected to the IO5 end of the first controller, the first output end of the boost device is connected to the third end of the first rectifier, and the second output end of the boost device is connected to the fourth end of the first rectifier.

6. A video conferencing system according to claim 5, characterized in that: The electric energy processing module includes a third thyristor, a seventh resistor, a fifth capacitor, a fourth thyristor, an eighth resistor and a first switch tube; The cathode of the third thyristor is connected to the anode of the first diode, the anode of the third thyristor is connected to the cathode of the fourth thyristor and one end of the fifth capacitor, the anode of the fourth thyristor is connected to the fixed end of the first relay switch through the eighth resistor, the control end of the fourth thyristor is connected to the collector of the first switch tube and connected to the IO6 end of the first controller through the seventh resistor, the control end of the third thyristor is connected to the IO3 end of the first controller, the emitter of the first switch tube and the other end of the fifth capacitor are grounded, and the base of the first switch tube is connected to the bypass control module.

7. A video conferencing system according to claim 6, characterized in that: The bypass control module further includes a ninth resistor, a second switch tube, a tenth resistor, a sixth capacitor, an eleventh resistor, a third switch tube, a first relay, a second power supply, a fourth switch tube and a twelfth resistor; the intelligent control module further includes a clock device; The base of the second switch tube is connected to the IO6 terminal of the first controller through the ninth resistor, the clock device is connected to the IO7 terminal of the first controller, the collector of the second switch tube, the collector of the fourth switch tube and one end of the first relay are all connected to the second power supply, the emitter of the second switch tube is connected to one end of the tenth resistor and one end of the sixth capacitor and is connected to the base of the third switch tube and the base of the fourth switch tube through the eleventh resistor, the collector of the third switch tube is connected to the other end of the first relay, the other end of the tenth resistor, the other end of the sixth capacitor, the emitter of the third switch tube and one end of the twelfth resistor are all grounded, and the emitter of the fourth switch tube is connected to the other end of the twelfth resistor and the base of the first switch tube.

8. A slow start circuit, characterized in that: The slow start circuit is applied to the video conferencing system as described in any one of claims 1-7.

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