CN215954105U - Programmable power supply sequential control system and device - Google Patents
Programmable power supply sequential control system and device Download PDFInfo
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- CN215954105U CN215954105U CN202122253652.4U CN202122253652U CN215954105U CN 215954105 U CN215954105 U CN 215954105U CN 202122253652 U CN202122253652 U CN 202122253652U CN 215954105 U CN215954105 U CN 215954105U
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Abstract
The utility model discloses a programmable power supply time sequence control system and a programmable power supply time sequence control device, wherein the system comprises a microprocessor, a voltage and current signal processing unit, a current sampling unit, a relay control unit and a power supply time sequence output circuit; the relay control unit comprises a relay drive circuit and a relay control output circuit; the microprocessor is connected to the voltage and current signal processing unit and the relay driving circuit; the relay driving circuit is connected to the relay control output circuit; the relay control output circuit is connected to the power supply time sequence output circuit; the current sampling unit is connected to the relay control output circuit and the voltage and current signal processing unit; the system can realize the timing fixed point opening and closing of the power supply sequential output circuit, controls the opening and closing in real time, has higher practicability and more convenient operation, and can be widely applied to the technical field of electronic circuits.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a programmable power supply time sequence control system and a programmable power supply time sequence control device.
Background
With the development of modern science and technology, the demand on a multimedia conference sound system is higher and higher in daily work; because the multimedia conference sound system has a plurality of devices, the connection sequence and the on-off sequence can not be wrong, otherwise the devices can be damaged. In the prior art, a power supply sequencer is developed to control a plurality of audio devices, but the audio devices can only be manually controlled, the power supply sequencer can only start power supplies one by one from a front-stage device to a rear-stage device, when the power supply is closed, various electric devices are closed in a sequence from the rear stage to the front stage, and the start and close time and sequence of the devices cannot be freely defined according to the self intention of a user.
In addition, the conventional power supply timer generally has no current and voltage monitoring function, and cannot know the working condition of connected equipment; in addition, the existing power supply chronograph generally adopts multi-key operation, which is inconvenient to operate and has the condition of mistaken touch; moreover, most power supply timers can only simply control the power supply equipment to be turned on and turned off, and cannot automatically turn on or turn off, so that manual operation is still needed every day, and the work content is monotonous and tedious.
SUMMERY OF THE UTILITY MODEL
To solve one of the above technical problems, the present invention aims to: the programmable power supply time sequence control system can monitor current and voltage in real time and can be programmed in a reserved mode, and the programmable power supply time sequence control device can achieve corresponding functions.
The technical scheme adopted by the utility model is as follows:
in a first aspect, the present invention provides a programmable power timing control system, which includes a microprocessor, a voltage/current signal processing unit, a current sampling unit, a relay control unit, and a power timing output circuit; the relay control unit comprises a relay drive circuit and a relay control output circuit;
the microprocessor is connected to the voltage and current signal processing unit and is also connected with a relay driving circuit; the output end of the relay driving circuit is connected to the input end of the relay control output circuit; the output end of the relay control output circuit is connected to the input end of the power supply sequential output circuit; the output end of the current sampling unit is connected to the input end of the relay control output circuit, and the output end of the current sampling unit is connected to the input end of the voltage and current signal processing unit.
In some optional embodiments, the system further comprises a shift register, an optical coupling control circuit and a stepping driving chip;
the input end of the shift register is connected to the output end of the microprocessor, the input end of the optical coupling control circuit is connected to the output end of the shift register, and the output end of the optical coupling control circuit is connected to the input end of the stepping drive chip; and the output end of the stepping driving chip is connected to the input end of the relay driving circuit.
In some optional embodiments, the system further comprises an interaction unit, wherein the interaction unit comprises a serial port display screen, a physical touch key and an output state display lamp;
the serial port display screen is connected to the microprocessor, the physical touch key is connected to the microprocessor, and the output state display lamp is connected to the microprocessor.
In some optional embodiments, the system further comprises a network communication unit comprising a network transformer, a switch chip, and a network interface;
the network transformer is connected with the microprocessor, the switch chip is connected with the network transformer, and the network interface is connected with the switch chip.
In some optional embodiments, the system further comprises a power supply unit, the power supply unit comprising a mains input module, an input voltage sampling module, and a system power supply module;
the output end of the mains supply input module is connected to the input end of the relay control output circuit, and the output end of the mains supply input module is also connected to the input end of the input voltage sampling module; the output end of the input voltage sampling module is connected to the input end of the voltage and current signal processing unit; the output end of the commercial power input module is also connected to the system power supply module.
In some optional embodiments, the system further comprises a clock circuit coupled to the microprocessor.
In some optional embodiments, the input voltage sampling module comprises a voltage dividing resistor, a voltage transformer and a waveform shaping circuit;
the input section of the commercial power input module is connected to the divider resistor, and the divider resistor is connected to the primary coil of the voltage transformer; the secondary coil of the voltage transformer is connected with the waveform shaping circuit; the waveform shaping circuit is also connected to the voltage current signal processing unit.
In a second aspect, the present invention provides a programmable power supply timing control apparatus comprising a programmable power supply timing control system of the first aspect.
The utility model has the beneficial effects that: according to the technical scheme, the relay control unit and the power supply time sequence output circuit in the system are controlled through the preset program in the microprocessor, so that each branch in the power supply time sequence output circuit is opened and closed at fixed time and fixed points, and can be controlled to be opened and closed in real time, the practicability is higher, and the operation is more convenient; the current sampling unit in the system can monitor the output voltage and current state of each branch circuit in real time, and the precision of the current and voltage visualization is higher.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of a programmable power timing control system according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a ten-phase ac power metering chip according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a shift register, an optocoupler control circuit, and a step driver chip in the system according to an embodiment of the utility model;
FIG. 4 is a schematic diagram illustrating the operation of a network communication unit in the system according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of an input voltage sampling circuit and a detection branch in a system according to an embodiment of the present invention;
fig. 6 is a block diagram of another programmable power timing control system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length," "upper," "lower," "front," "rear," "left," "right," "top," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to solve the technical problems or defects pointed out in the background art, the embodiment of the application provides a multi-channel power supply time sequence control system capable of monitoring the current and the voltage in real time and being programmed in a reserved mode, the working current state of each channel can be displayed in a centralized mode, the on and off of each channel are controlled, the display is visual, and the operation is humanized. In a first aspect, as shown in fig. 1, the programmable power timing control system provided by the present invention includes a microprocessor, a voltage/current signal processing unit, a current sampling unit, a relay control unit, and a power timing output circuit; the relay control unit comprises a relay drive circuit and a relay control output circuit.
Description
The microprocessor is connected to the voltage and current signal processing unit and the relay driving circuit; the output end of the relay drive circuit is connected to the input end of the relay control output circuit; the output end of the relay control output circuit is connected to the input end of the power supply time sequence output circuit; the output end of the current sampling unit is connected to the input end of the relay control output circuit, and the output end of the current sampling unit is connected to the input end of the voltage and current signal processing unit.
Specifically, in the embodiment, a Microprocessor (MCU) is mainly configured to receive current waveform data and voltage waveform data of the voltage/current signal processing Unit, perform conversion on the data, and transmit the data to a display screen of the interaction Unit, so as to display output voltage/current data of each channel in real time; illustratively, the STM32F103Z chip is adopted as an MCU in the embodiment. In addition, the MCU in the embodiment may also be configured to store a preset control program or receive a control instruction issued by a user through the communication module, and send corresponding control to other units or modules in the system, so that the other units or modules complete corresponding actions. And the voltage and current signal processing unit is mainly used for acquiring the current and the input voltage signals of the output branch, performing analog-to-digital conversion, calibration, sampling, filtering and other processing on the acquired current signals and voltage signals to obtain current waveform data and voltage waveform data, and transmitting the two waveform data to the MCU. The current sampling unit in the system is mainly used for sampling input voltage and multipath output current. The power supply time sequence output circuit in the embodiment comprises a plurality of output branches, and each branch is used for outputting current and voltage according to the on and off of the relay control unit. In the embodiment, the relay control unit is mainly used for switching to an on or off state according to a control signal or an instruction of the MCU so as to achieve the purpose of controlling the power output of the power sequential output circuit; in implementation, the relay control unit may include a relay driving circuit and a relay control output circuit, wherein the relay driving circuit is mainly used for receiving a control signal or instruction of the MCU and controlling the relay control output circuit; the relay control output circuit is mainly used for completing the opening and closing actions of the relay according to the control of the relay driving circuit, is connected to the power supply input of the relay control output circuit in an opening state, and can provide power supply for the power supply time sequence output circuit so as to realize the time sequence output of the power supply; in the off state, the power supply input is cut off, and the power supply output of the power supply time sequence output circuit is stopped.
Illustratively, as shown in fig. 2, the voltage and current signal processing unit in the embodiment is a ten-phase alternating current power metering chip, the voltage and current detection adopts a high-precision voltage and current transformer to sample the input voltage and the multiple output currents, and the differential signal of the sampled current voltage is sent to the ten-phase alternating current power metering chip BL0910 to be processed. BL0910 is a built-in clock multi-path calibration-free electric energy metering chip, BL0910 integrates 11 paths of high-precision Sigma-Delta ADCs, and can measure 11 paths of signals (current or voltage) simultaneously; the analog parts such as a crystal oscillator, a reference voltage, temperature measurement and the like are built in the digital temperature measuring device, double-end differential signal input is adopted in the embodiment, current and input voltage signals of an output branch circuit are collected, the collected signals are transmitted to a digital module through a PGA (programmable Gate array) of an internal analog module of BL0910 and a 1-bit PDM (pulse width modulation) code obtained by a high-precision analog-to-digital conversion ADC (analog-to-digital converter), the digital module obtains required current waveform data and voltage waveform data through modules such as a phase calibration module, a down-sampling filter SINC3, a high-pass filter HPF (high pass filter) and gain and bias correction module, and then the required current waveform data and voltage waveform data are transmitted to an STM32F103Z chip of an MCU (microprogrammed control unit) microprocessor for communication processing, the MCU microprocessor converts the data in real time, then displays the output voltage and current data of each path through a display screen in real time, and visually sees the difference of the working current of equipment connected with each path.
In some possible embodiments, the embodiment system may further include a shift register, an optical coupling control circuit, and a step driving chip.
The input end of the shift register is connected to the output end of the microprocessor, the input end of the optical coupling control circuit is connected to the output end of the shift register, and the output end of the optical coupling control circuit is connected to the input end of the stepping drive chip; the output end of the stepping driving chip is connected to the input end of the relay driving circuit.
Specifically, a shift register in the system is used for storing and controlling the on and off of the optical coupling control circuit; the optical coupling control circuit is used for generating control signals through connection and disconnection and inputting the control signals to the stepping driving chip, and the stepping driving chip is used for controlling the relay driving circuit in the system.
Exemplarily, the system of the embodiment is provided with 8 paths of optical coupling control circuits, and the optical coupling control circuits can correspondingly drive 8 paths of relay driving circuits; as shown in fig. 3, compared with the conventional controller circuit, the output branch control circuit of this embodiment utilizes the optical coupler having the fast transmission characteristic to control the output relay thereof to be turned on and off, and the operating principle thereof is as follows: the MCU carries out instruction transmission with U2 shift register and controls the switching on and off of J1 opto-coupler, and the J1 opto-coupler produces control signal through switching on and off and gets into U3 input, and U3 converts the signal that comes from J1 and goes on accurate control to 8 way outputs.
In some possible embodiments, the system is further provided with an interaction unit, and the interaction unit includes, but is not limited to, a serial display screen, a physical touch key, and an output status display lamp.
The serial display screen is connected to the microprocessor, the physical touch key is connected to the microprocessor, and the output state display lamp is connected to the microprocessor.
Specifically, the physical touch key in the system of the embodiment is used for setting or adjusting the timing and the power of the output power. The serial port display screen is mainly used for displaying the output voltage and current data of each path in real time; and moreover, the menu can be edited and controlled on the serial port display screen, and equipment for supplying power to each branch circuit can be controlled at will to be controlled to be turned on and off by controlling the relay driving circuit through the MCU microprocessor. The output state display lamp in the system is used for representing the output state of a certain branch, and the display lamp is in an output on state when being on, and is in an off state when not being on.
Illustratively, the physical touch key of the power supply time sequence control system of the embodiment is a screen menu editing button, and a pulse potentiometer is adopted to adjust a display screen menu, compared with the conventional power supply time sequence device which usually adopts multi-key operation, the operation is more convenient, the MCU microprocessor collects the operation data of the screen menu editing button and displays the operation data on a serial display screen to edit and control the menu, equipment which can randomly control power supply to each branch circuit controls a relay driving circuit to be opened and closed through the MCU microprocessor, and the long-bright state display lamp of each branch circuit can visually see that the corresponding branch circuit output is opened. And simultaneously, the opening and closing sequence and the time interval of each branch of the programmable power supply time schedule controller when the controller is opened or closed can be preset.
In some possible embodiments, the system further comprises a network communication unit comprising a network transformer, a switch chip, and a network interface.
The network transformer is connected with the microprocessor, the switch chip is connected with the network transformer, and the network interface is connected with the switch chip.
Specifically, the switch chip of the embodiment system is mainly used for signal level coupling; the embodiment system needs to provide high-performance and low-delay exchange, and the function of high-performance exchange is mainly completed by an exchange chip; the network interface finally transmits the network signal.
For example, as shown in fig. 4, the power timing control system of the embodiment may be connected to a network switch through an RJ45 interface, and connected to a PC host through the network switch, where a terminal control interface of the PC host can display an input voltage and an input current of the power timing controller and a switching state and a current magnitude of each branch in real time, and can set a time of the PC host to be synchronized with a time of a DS3231SN clock circuit, so as to achieve more precise control, and the terminal control interface of the PC host can separately reserve the on and off of each branch of the programming power timing controller. Through the control of the PC host, the problem that the traditional time sequence device needs manual work to adjust the setting in front of the equipment is solved, and the remote control and real-time monitoring functions are realized. When a plurality of power supply time sequence controllers are arranged, the cascade control of the plurality of power supply time sequence controllers can be realized through network connection.
In some possible embodiments, the embodiment system further includes a power supply unit, the power supply unit including a mains supply input module, an input voltage sampling module, and a system power supply module;
the output end of the mains supply input module is connected to the input end of the relay control output circuit, and the output end of the mains supply input module is also connected to the input end of the input voltage sampling module; the output end of the input voltage sampling module is connected to the input end of the voltage and current signal processing unit; the output end of the commercial power input module is also connected to the system power supply module.
Specifically, the mains supply input module in the embodiment is an AC mains supply input, and is mainly used for providing an input power supply of the power supply timing sequence output branch; the voltage sampling module is mainly used for collecting voltage data input by AC mains supply and sending the voltage data to the voltage and current signal processing unit; the system power supply module in the embodiment is a high-performance switching power supply and supplies power to other units or modules in the system.
In some possible embodiments, the input voltage sampling module in the system comprises a voltage dividing resistor, a voltage transformer and a waveform shaping circuit;
the input section of the commercial power input module is connected to a divider resistor, and the divider resistor is connected to a primary coil of a voltage transformer; the secondary coil of the voltage transformer is connected with a finger waveform shaping circuit; the waveform shaping circuit is also connected to the voltage-current signal processing unit.
In addition, in an embodiment, the system may further include a branch current detection circuit, wherein an input end of the branch current detection circuit is connected to an output end of the utility power input module, and an output end of the branch current detection circuit is connected to the power timing output circuit.
Specifically, as shown in fig. 5, the input voltage sampling circuit 501 and the detection branch 502 are 8 output branch currents, and the operating principle of the input voltage sampling branch 501 is as follows: the input voltages L and N are sampled, the voltage transformer T1 is a precision voltage transformer, a primary coil of the T1 is connected with the divider resistor R1, the divider resistor R2, the divider resistor R3 and the divider resistor R4 in series, a secondary coil of the voltage transformer T1 generates induced voltage, the induced voltage is shaped through the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the first capacitor C1 and the second capacitor C2 to generate differential voltage waveform data, and the differential voltage waveform data are sent to pins 13 and 14 of the voltage-current signal processing unit U1 to be subjected to data conversion.
In the detection branch 502, a precise current transformer is adopted as a T2 element, a current flowing through an N line of the output branch is sampled, a 1.2 pin of the T2 generates an induced current, and the induced current is shaped by an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third capacitor C3 and a fourth capacitor C4 to generate differential current waveform data. And then transmits the data to a ten-phase alternating current power metering chip BL 0910.
In some possible embodiments, the embodiment system further comprises a clock circuit coupled to the microprocessor.
Specifically, as shown in fig. 6, the clock circuit in the embodiment is a DS3231SN clock circuit, which has a timing function, and is also provided with a backup battery to supply power, so as to ensure that the internal timing can be accurately timed when the controller is turned off, and DS3231SN is a high-performance, low-power consumption, real-time clock circuit with RAM, which can time years, months, days, weeks, hours, minutes, and seconds, and has a leap year compensation function, and can perform the functions of well timing and displaying time. STM32F103Z reads DS3231SN clock circuit time and compares the time with the current preset time data, displays the current time on the display screen, and turns on or off the power supply chronograph if the preset time data is the same as the current time.
In a second aspect, the present invention also provides a programmable power timing control apparatus comprising a programmable power timing control system of the first aspect.
In summary, compared with the prior art, the utility model has the following characteristics or advantages:
1. the technical scheme of the utility model has the advantages that the output voltage and current state of each branch circuit can be monitored in real time, and the precision of the displayed current and voltage is high;
2. according to the technical scheme, each branch can be opened and closed at fixed time and fixed point by means of reserved programming, each branch can be controlled to be opened and closed in real time, and the method is high in practicability and convenient to operate;
3. the technical scheme of the utility model can carry out remote control and monitoring through network connection, and can carry out cascade control by connecting a plurality of power supply time sequence controllers through the network.
In the description herein, references to the description of "one embodiment," "another embodiment," or "certain embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A programmable power supply time sequence control system is characterized by comprising a microprocessor, a voltage and current signal processing unit, a current sampling unit, a relay control unit and a power supply time sequence output circuit; the relay control unit comprises a relay drive circuit and a relay control output circuit;
the microprocessor is connected to the voltage and current signal processing unit and is also connected with a relay driving circuit; the output end of the relay driving circuit is connected to the input end of the relay control output circuit; the output end of the relay control output circuit is connected to the input end of the power supply sequential output circuit; the output end of the current sampling unit is connected to the input end of the relay control output circuit, and the output end of the current sampling unit is also connected to the input end of the voltage and current signal processing unit.
2. A programmable power timing control system as claimed in claim 1, wherein the system further comprises a shift register, an optical coupling control circuit and a step driving chip;
the input end of the shift register is connected to the output end of the microprocessor, the input end of the optical coupling control circuit is connected to the output end of the shift register, and the output end of the optical coupling control circuit is connected to the input end of the stepping drive chip; and the output end of the stepping driving chip is connected to the input end of the relay driving circuit.
3. The programmable power timing control system of claim 1, further comprising an interaction unit, wherein the interaction unit comprises a serial display screen, a physical touch key and an output status display lamp;
the serial port display screen is connected to the microprocessor, the physical touch key is connected to the microprocessor, and the output state display lamp is connected to the microprocessor.
4. A programmable power timing control system as claimed in claim 1, wherein the system further comprises a network communication unit comprising a network transformer, a switch chip and a network interface;
the network transformer is connected with the microprocessor, the switch chip is connected with the network transformer, and the network interface is connected with the switch chip.
5. A programmable power timing control system according to claim 1, wherein the system further comprises a power supply unit, the power supply unit comprising a mains input module, an input voltage sampling module, and a system power supply module;
the output end of the mains supply input module is connected to the input end of the relay control output circuit, and the output end of the mains supply input module is also connected to the input end of the input voltage sampling module; the output end of the input voltage sampling module is connected to the input end of the voltage and current signal processing unit; the output end of the commercial power input module is also connected to the system power supply module.
6. A programmable power timing control system as claimed in claim 1, further comprising a clock circuit, the clock circuit being coupled to the microprocessor.
7. A programmable power timing control system according to claim 5, wherein the input voltage sampling module comprises a voltage dividing resistor, a voltage transformer and a waveform shaping circuit;
the input section of the commercial power input module is connected to the divider resistor, and the divider resistor is connected to the primary coil of the voltage transformer; the secondary coil of the voltage transformer is connected with the waveform shaping circuit; the waveform shaping circuit is also connected to the voltage current signal processing unit.
8. A programmable power timing control system as claimed in claim 5, further comprising a branch current detection circuit, an input of the branch current detection circuit being connected to an output of the mains input module, an output of the branch current detection circuit being connected to the power timing output circuit.
9. A programmable power timing control system as claimed in any one of claims 1 to 8, wherein the voltage current signal processing unit is a ten-phase ac power metering chip.
10. A programmable power timing control apparatus, comprising a programmable power timing control system as claimed in any one of claims 1 to 7.
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| CN202122253652.4U CN215954105U (en) | 2021-09-16 | 2021-09-16 | Programmable power supply sequential control system and device |
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