CN115765146B - Standby power supply control system and control method - Google Patents
Standby power supply control system and control method Download PDFInfo
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- CN115765146B CN115765146B CN202310032265.9A CN202310032265A CN115765146B CN 115765146 B CN115765146 B CN 115765146B CN 202310032265 A CN202310032265 A CN 202310032265A CN 115765146 B CN115765146 B CN 115765146B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a standby power supply control system and a control method, comprising the following steps: the system comprises a standby power supply control unit, a mains supply detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit. And seamless switching between the standby power supply and the commercial power is realized.
Description
Technical Field
The invention relates to the technical field of standby power supplies, in particular to a standby power supply control system and a standby power supply control method.
Background
The traffic signal lamp can effectively control traffic, and has obvious effects of dredging traffic flow, improving road traffic capacity and reducing traffic accidents. Therefore, the traffic signal lamp plays a crucial role in road driving safety.
However, if the power failure condition of the crossing occurs, the traffic signal lamp is extinguished, so that the traffic paralysis of the crossing is easy to cause traffic accidents; in addition, the existing standby generator is adopted for power supply, so that the timeliness is poor, and in addition, the generator is not provided more and is high in price.
Therefore, a solution is needed to solve the above problems.
Disclosure of Invention
The present invention provides a standby power control system and a control method thereof, which solve the above problems in the prior art.
The invention provides a standby power supply control system, comprising: the system comprises a standby power supply control unit, a mains supply detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
Preferably, when the mains supply detection unit detects that the mains supply voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the mains supply is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit;
in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state;
and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit.
Preferably, the mains supply detection unit continuously detects that the mains supply voltage is greater than the first threshold voltage, and the mains supply detection unit detects that the mains supply voltage is always above the first threshold voltage within a third set time through the mains supply detection unit, so that the mains supply is judged to be in a steady state.
Preferably, the standby power control unit includes: an inverter, a backup power supply charger unit;
in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
Preferably, the signal conversion circuit converts the mains supply sampling voltage signal output by the mains supply detection circuit from positive and negative sine waves to positive sine waves, the square wave generation circuit converts the positive sine wave signal of the mains supply into square waves synchronously related to the mains supply, and the interruption recognition circuit detects edges of the square waves output by the square wave generation circuit;
and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
The invention provides a control method of a standby power supply control system, which comprises the following steps:
s100, a standby power supply control unit, a commercial power detection unit and a standby power supply are arranged; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
s200, when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power supply control unit;
s300, after receiving the first signal, the standby power control unit controls the mains supply detection unit to sample the mains supply to be in an unstable state in a first set time and the frequency exceeds a threshold value, and the standby power control unit controls the standby power to be connected with the annunciator unit and cuts off the connection between the mains supply and the annunciator unit;
and S400, if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
Preferably, the S200 includes:
s201, when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, judging that the commercial power is in a temporary steady state;
s202, in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and controlling the commercial power access annunciator unit by the standby power control unit;
s203, in a second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, determining that the commercial power is in an unstable state;
and S204, in the non-steady state, if the commercial power detection unit detects that the commercial power voltage is smaller than the third threshold voltage in the third set time, judging that the commercial power is in a conversion state, and controlling the standby power to be connected to the annunciator unit by the standby power control unit.
Preferably, the S400 includes:
s401, continuously detecting that the mains voltage is larger than a first threshold voltage by a mains detection unit and within a third set time through the mains detection unit;
s402, the mains supply detection unit detects that the mains supply voltage is always above a first threshold voltage, and judges that the mains supply is in a steady state.
Preferably, the method further comprises:
s500, setting an inverter and a standby power supply charger unit;
s600, in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply charges a standby power supply through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
s700, in the stage that the standby power supply is connected to the annunciator unit, the inverter converts 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
Preferably, the S300 includes:
s301, converting a mains supply sampling voltage signal output by a mains supply detection circuit from a positive sine wave and a negative sine wave into a positive sine wave;
s302, a square wave generating circuit for converting a signal of a forward sine wave of the mains supply into a square wave synchronously related to the mains supply;
s303, an interruption recognition circuit for detecting edges of square waves output by the square wave generation circuit;
s304, judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
Compared with the prior art, the invention has the following advantages:
the invention provides a standby power supply control system and a control method, wherein the standby power supply control system comprises: the system comprises a standby power supply control unit, a mains supply detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a standby power control system according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a commercial power detection unit according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a standby power control system according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
An embodiment of the present invention provides a standby power control system, please refer to fig. 1 to 2, which includes:
the system comprises a standby power supply control unit, a mains supply detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is a standby power supply control unit, a commercial power detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
The beneficial effects of the technical scheme are as follows: the scheme provided by the embodiment is adopted for the standby power supply control unit, the commercial power detection unit and the standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, when the mains voltage is detected to be smaller than the first threshold voltage and larger than the second threshold voltage by the mains detection unit, the mains is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit;
in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state;
and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit.
Regardless of whether the first threshold voltage, the second threshold voltage or the third threshold voltage is set, the threshold voltage can be set according to a threshold dynamic adjustment method, and specific setting modes include: and aiming at a certain threshold voltage, such as a first threshold voltage, a second threshold voltage or a third threshold voltage, the threshold voltage is adjusted in a dynamic adjustment mode, so that the reasonability of threshold voltage setting is ensured, and the accuracy of comparison judging conditions is further ensured.
For example, for the first threshold voltage V1th, two thresholds V1, V2 may be set, the threshold V1 being smaller than the threshold V2, the time from the threshold V1 to the threshold V2 being the threshold time difference
。
Wherein, the liquid crystal display device comprises a liquid crystal display device,
indicating a threshold correction value,
representing the difference in the threshold time and,
representing a first adjustmentThe threshold, V2, represents a second adjustment threshold,
represents a threshold weight parameter, and k represents a threshold adjustment amplitude. The first threshold voltage, the second threshold voltage or the third threshold voltage is subjected to threshold correction through the threshold correction value.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the commercial power is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit; in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state; and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit.
The beneficial effects of the technical scheme are as follows: by adopting the scheme provided by the embodiment, when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the commercial power is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit; in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state; and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically. And seamless switching of the commercial power and the standby power is realized. The problem of traffic jam caused by power failure at the crossing is avoided.
In another embodiment, the mains voltage is continuously detected by the mains detection unit to be greater than the first threshold voltage, and the mains voltage is detected by the mains detection unit to be always above the first threshold voltage within the third set time through the mains detection unit, so as to determine that the mains is in a steady state.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the commercial power detection unit continuously detects that the commercial power voltage is larger than the first threshold voltage, and the commercial power detection unit detects that the commercial power voltage is always above the first threshold voltage in a third set time through the commercial power detection unit, so that the commercial power is judged to be in a steady state.
The beneficial effects of the technical scheme are as follows: by adopting the scheme provided by the embodiment, the mains supply voltage is continuously detected to be larger than the first threshold voltage by the mains supply detection unit, and the mains supply voltage is detected to be always above the first threshold voltage by the mains supply detection unit in the third set time, so that the mains supply is judged to be in a steady state. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, the backup power control unit includes: an inverter, a backup power supply charger unit;
in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the standby power supply control unit comprises: an inverter, a backup power supply charger unit; in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit; and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
The beneficial effects of the technical scheme are as follows: the standby power supply control unit adopting the scheme provided by the embodiment comprises: an inverter, a backup power supply charger unit; in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit; and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, the utility power sampling voltage signal output by the utility power detection circuit is converted into a forward sine wave from a positive sine wave and a negative sine wave, the signal conversion circuit converts the forward sine wave signal of the utility power into a square wave generation circuit synchronously related to the utility power, and the interruption recognition circuit carries out edge detection on the square wave output by the square wave generation circuit;
and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the utility power sampling voltage signal output by the utility power detection circuit is converted into a forward sine wave from a positive sine wave and a negative sine wave, the forward sine wave signal of the utility power is converted into a square wave generating circuit which is synchronous with the utility power and is related to the square wave, and the interrupt recognition circuit is used for carrying out edge detection on the square wave output by the square wave generating circuit; and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
The beneficial effects of the technical scheme are as follows: the scheme provided by the embodiment is adopted to convert the mains supply sampling voltage signal output by the mains supply detection circuit from a positive sine wave and a negative sine wave into a positive sine wave, convert the signal of the positive sine wave of the mains supply into a square wave generating circuit synchronously related to the mains supply and an interruption recognition circuit for carrying out edge detection on the square wave output by the square wave generating circuit; and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, a control method of a standby power control system is provided, referring to fig. 3, the control method includes:
s100, a standby power supply control unit, a commercial power detection unit and a standby power supply are arranged; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
s200, when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power supply control unit;
s300, after receiving the first signal, the standby power control unit controls the mains supply detection unit to sample the mains supply to be in an unstable state in a first set time and the frequency exceeds a threshold value, and the standby power control unit controls the standby power to be connected with the annunciator unit and cuts off the connection between the mains supply and the annunciator unit;
and S400, if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that a standby power supply control unit, a commercial power detection unit and a standby power supply are arranged; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power supply control unit; after the standby power supply control unit receives the first signal, when the frequency of the mains supply detection unit for sampling the mains supply in an unstable state exceeds a threshold value, the standby power supply control unit controls the standby power supply to be connected with the annunciator unit, and the connection between the mains supply and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit.
The beneficial effects of the technical scheme are as follows: the scheme provided by the embodiment is adopted to set a standby power supply control unit, a commercial power detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit; when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power supply control unit; after the standby power supply control unit receives the first signal, when the frequency of the mains supply detection unit for sampling the mains supply in an unstable state exceeds a threshold value, the standby power supply control unit controls the standby power supply to be connected with the annunciator unit, and the connection between the mains supply and the annunciator unit is cut off; and if the commercial power detection unit continuously detects that the commercial power is in a stable state, sending a second signal to the standby power control unit, and controlling the commercial power to be re-connected to the annunciator unit by the standby power control unit according to the second signal, and cutting off the connection between the standby power and the annunciator unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically. The seamless switching between the commercial power and the standby power is realized, and the problem of traffic jam caused by power failure at the intersection is avoided.
In another embodiment, the S200 includes:
s201, when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, judging that the commercial power is in a temporary steady state;
s202, in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and controlling the commercial power access annunciator unit by the standby power control unit;
s203, in a second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, determining that the commercial power is in an unstable state;
and S204, in the non-steady state, if the commercial power detection unit detects that the commercial power voltage is smaller than the third threshold voltage in the third set time, judging that the commercial power is in a conversion state, and controlling the standby power to be connected to the annunciator unit by the standby power control unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the commercial power is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit; in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state; and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit.
The beneficial effects of the technical scheme are as follows: by adopting the scheme provided by the embodiment, when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the commercial power is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit; in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state; and when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically. And seamless switching of the commercial power and the standby power is realized. The problem of traffic jam caused by power failure at the crossing is avoided.
In another embodiment, the S400 includes:
s401, continuously detecting that the mains voltage is larger than a first threshold voltage by a mains detection unit and within a third set time through the mains detection unit;
s402, the mains supply detection unit detects that the mains supply voltage is always above a first threshold voltage, and judges that the mains supply is in a steady state.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the commercial power detection unit continuously detects that the commercial power voltage is larger than the first threshold voltage, and the commercial power detection unit detects that the commercial power voltage is always above the first threshold voltage in a third set time through the commercial power detection unit, so that the commercial power is judged to be in a steady state.
The beneficial effects of the technical scheme are as follows: by adopting the scheme provided by the embodiment, the mains supply voltage is continuously detected to be larger than the first threshold voltage by the mains supply detection unit, and the mains supply voltage is detected to be always above the first threshold voltage by the mains supply detection unit in the third set time, so that the mains supply is judged to be in a steady state. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, the method further comprises:
s500, setting an inverter and a standby power supply charger unit;
s600, in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply charges a standby power supply through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
s700, in the stage that the standby power supply is connected to the annunciator unit, the inverter converts 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the standby power supply control unit comprises: an inverter, a backup power supply charger unit; in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit; and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
The beneficial effects of the technical scheme are as follows: the standby power supply control unit adopting the scheme provided by the embodiment comprises: an inverter, a backup power supply charger unit; in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit; and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
In another embodiment, the S300 includes:
s301, converting a mains supply sampling voltage signal output by a mains supply detection circuit from a positive sine wave and a negative sine wave into a positive sine wave;
s302, a square wave generating circuit for converting a signal of a forward sine wave of the mains supply into a square wave synchronously related to the mains supply;
s303, an interruption recognition circuit for detecting edges of square waves output by the square wave generation circuit;
s304, judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
The working principle of the technical scheme is as follows: the scheme adopted by the embodiment is that the utility power sampling voltage signal output by the utility power detection circuit is converted into a forward sine wave from a positive sine wave and a negative sine wave, the forward sine wave signal of the utility power is converted into a square wave generating circuit which is synchronous with the utility power and is related to the square wave, and the interrupt recognition circuit is used for carrying out edge detection on the square wave output by the square wave generating circuit; and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
The beneficial effects of the technical scheme are as follows: the scheme provided by the embodiment is adopted to convert the mains supply sampling voltage signal output by the mains supply detection circuit from a positive sine wave and a negative sine wave into a positive sine wave, convert the signal of the positive sine wave of the mains supply into a square wave generating circuit synchronously related to the mains supply and an interruption recognition circuit for carrying out edge detection on the square wave output by the square wave generating circuit; and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit. The state of the commercial power is monitored in real time, when the commercial power fails, the standby power supply can be switched to supply power to the annunciator in a seamless mode, and when the commercial power is recovered, the standby power supply can be switched back to the commercial power supply automatically.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A backup power control system, comprising: the system comprises a standby power supply control unit, a mains supply detection unit and a standby power supply; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power control unit, and after the standby power control unit receives the first signal, the standby power control unit controls the commercial power detection unit to sample the frequency of the commercial power in the unstable state within a first set time to exceed a threshold value, and controls the standby power to be connected with the annunciator unit, so that the connection between the commercial power and the annunciator unit is cut off; if the commercial power detection unit continuously detects that the commercial power is in a stable state, a second signal is sent to the standby power control unit, and the standby power control unit controls the commercial power to be re-connected to the annunciator unit according to the second signal, so that the connection between the standby power and the annunciator unit is cut off;
when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, the commercial power is judged to be in a temporary steady state; in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and the standby power supply control unit controls the commercial power access annunciator unit;
in the second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, judging that the commercial power is in an unstable state;
when the power supply is in an unstable state, in a third set time, if the commercial power detection unit detects that the commercial power voltage is smaller than a third threshold voltage, judging that the commercial power is in a conversion state, and controlling the standby power supply to be connected with the annunciator unit by the standby power supply control unit;
regardless of whether the first threshold voltage, the second threshold voltage or the third threshold voltage is set, the threshold voltage can be set according to a threshold dynamic adjustment method, and specific setting modes include: aiming at the first threshold voltage, the second threshold voltage or the third threshold voltage, the adjustment is carried out in a dynamic adjustment mode, the reasonability of the threshold voltage setting is ensured, and the accuracy of comparison judging conditions is further ensured;
for the first threshold voltage V1th, two thresholds V1, V2 may be set, the threshold V1 is smaller than the threshold V2, and the time difference between the threshold V1 and the threshold V2 is the threshold time difference
；
2. The standby power control system according to claim 1, wherein the utility power detecting unit continuously detects that the utility power voltage is greater than the first threshold voltage, and the utility power detecting unit detects that the utility power voltage is always above the first threshold voltage in a third set time period through the utility power detecting unit, so as to determine that the utility power is in a steady state.
3. The backup power control system of claim 1, wherein the backup power control unit comprises: an inverter, a backup power supply charger unit;
in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply is charged through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
and in the stage that the standby power supply is connected to the annunciator unit, the inverter converts the 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
4. The backup power supply control system according to claim 1, wherein the utility power sampling voltage signal output by the utility power detection circuit is converted from a positive sine wave and a negative sine wave to a positive sine wave by the signal conversion circuit, the signal conversion circuit converts the positive sine wave of the utility power to a square wave generating circuit which is synchronous with the utility power and correlates with the square wave, and the interruption recognition circuit detects the edges of the square wave output by the square wave generating circuit;
and judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
5. A control method of a backup power supply control system, comprising:
s100, a standby power supply control unit, a commercial power detection unit and a standby power supply are arranged; the standby power supply control unit is connected with the mains supply, the mains supply detection unit, the standby power supply and the annunciator unit;
s200, when the commercial power detection unit detects that the commercial power is in an unstable state, a first signal is sent to the standby power supply control unit;
s300, after receiving the first signal, the standby power control unit controls the mains supply detection unit to sample the mains supply to be in an unstable state in a first set time and the frequency exceeds a threshold value, and the standby power control unit controls the standby power to be connected with the annunciator unit and cuts off the connection between the mains supply and the annunciator unit;
s400, if the commercial power detection unit continuously detects that the commercial power is in a stable state, a second signal is sent to the standby power supply control unit, and the standby power supply control unit controls the commercial power to be re-connected to the annunciator unit according to the second signal, so that the connection between the standby power supply and the annunciator unit is cut off;
the S200 includes:
s201, when the commercial power detection unit detects that the commercial power voltage is smaller than the first threshold voltage and larger than the second threshold voltage, judging that the commercial power is in a temporary steady state;
s202, in a second set time, if the commercial power detection unit detects that the commercial power is always in a temporary steady state, judging that the commercial power is in a metastable state, and controlling the commercial power access annunciator unit by the standby power control unit;
s203, in a second set time, if the commercial power detection unit detects that the commercial power voltage is smaller than the second threshold voltage and larger than the third threshold voltage, determining that the commercial power is in an unstable state;
s204, in the non-steady state, if the commercial power detection unit detects that the commercial power voltage is smaller than the third threshold voltage in the third set time, judging that the commercial power is in a conversion state, and controlling the standby power to be connected to the annunciator unit by the standby power control unit;
regardless of whether the first threshold voltage, the second threshold voltage or the third threshold voltage is set, the threshold voltage can be set according to a threshold dynamic adjustment method, and specific setting modes include: aiming at the first threshold voltage, the second threshold voltage or the third threshold voltage, the adjustment is carried out in a dynamic adjustment mode, the reasonability of the threshold voltage setting is ensured, and the accuracy of comparison judging conditions is further ensured;
for the first threshold voltage V1th, two thresholds V1, V2 may be set, the threshold V1 is smaller than the threshold V2, and the time difference between the threshold V1 and the threshold V2 is the threshold time difference
；
6. The control method of a backup power control system according to claim 5, wherein S400 includes:
s401, continuously detecting that the mains voltage is larger than a first threshold voltage by a mains detection unit and within a third set time through the mains detection unit;
s402, the mains supply detection unit detects that the mains supply voltage is always above a first threshold voltage, and judges that the mains supply is in a steady state.
7. The control method of a backup power control system according to claim 5, further comprising:
s500, setting an inverter and a standby power supply charger unit;
s600, in a standby power supply charging stage, the inverter converts 220v alternating current commercial power into 12v direct current, and the standby power supply charges a standby power supply through a standby power supply charger unit, and the standby power supply supplies power to a standby power supply control unit;
s700, in the stage that the standby power supply is connected to the annunciator unit, the inverter converts 12v direct current of the standby power supply into 220v alternating current, and the standby power supply is connected to the annunciator unit.
8. The control method of the backup power control system according to claim 5, wherein S300 includes:
s301, converting a mains supply sampling voltage signal output by a mains supply detection circuit from a positive sine wave and a negative sine wave into a positive sine wave;
s302, a square wave generating circuit for converting a signal of a forward sine wave of the mains supply into a square wave synchronously related to the mains supply;
s303, an interruption recognition circuit for detecting edges of square waves output by the square wave generation circuit;
s304, judging whether the commercial power is powered off or not based on the interruption recognition circuit, and if the commercial power is powered off, enabling the standby power supply to be connected into the annunciator unit by the standby power supply control unit.
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| CN209000224U (en) * | 2018-09-13 | 2019-06-18 | 深圳市鹏城交通网络股份有限公司 | A kind of traffic signaling equipment cabinet being equipped with backup power source interface |
| CN110460146B (en) * | 2019-09-23 | 2024-04-19 | 郑州师范学院 | Simple and easy stable anti-interference electricity system |
| CN210957888U (en) * | 2020-01-16 | 2020-07-07 | 深圳市中电核心科技有限公司 | Mobile charging device and system |
| CN111864885B (en) * | 2020-07-14 | 2022-04-22 | 苏州浪潮智能科技有限公司 | Hard disk power supply control device and method |
| CN114336939B (en) * | 2021-12-30 | 2023-06-16 | 盈帜科技（常州）有限公司 | Method for judging overvoltage and undervoltage of mains supply |
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