CN111817255A - Air switch collector and air switch device - Google Patents
Air switch collector and air switch device Download PDFInfo
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- CN111817255A CN111817255A CN202010704936.8A CN202010704936A CN111817255A CN 111817255 A CN111817255 A CN 111817255A CN 202010704936 A CN202010704936 A CN 202010704936A CN 111817255 A CN111817255 A CN 111817255A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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Abstract
The invention belongs to the technical field of air switches, and particularly relates to an air switch collector and an air switch device. Aiming at the defect that the existing household power distribution system has no overvoltage and undervoltage protection functions, the invention adopts the following technical scheme: an overhead collector, comprising: the alternating current acquisition module acquires analog signals in a tested loop; the analog signal conversion module converts an analog signal into a digital signal; a relay switch module; and the microprocessor reads the digital signal of the analog signal conversion module and controls the opening and closing of the relay switch module according to the acquired voltage and/or current conditions. The invention has the beneficial effects that: when the abnormal conditions such as overcurrent, overvoltage or undervoltage appear in the tested loop, the tested loop can be disconnected, and the power utilization safety is ensured.
Description
Technical Field
The invention belongs to the technical field of air switches, and particularly relates to an air switch collector and an air switch device.
Background
An air switch, also called an air circuit breaker, is a kind of circuit breaker, and is a switch that can automatically break when the current in the circuit exceeds the rated current. The air switch is not only applied to different household loops, such as lighting and bathroom circuits, but also can protect the circuits or electrical equipment to prevent short circuit and can be used for starting the motor infrequently. Common household power distribution systems are generally equipped with a leakage protector in addition to an air switch to solve the problem of leakage. When electricity leakage occurs, for example, a human body gets an electric shock, the current flows to the ground through the human body and generally exceeds 30 milliamperes, and the electricity leakage protector cuts off the power supply, so that the current is prevented from damaging the human body.
In the electricity utilization process, except the conditions of possible short circuit, electric leakage and the like, overvoltage, undervoltage and the like can also occur due to sudden change of the voltage of a power grid or overload of a user and other reasons. If need protect excessive pressure, undervoltage, then need additionally to increase excessive pressure undervoltage protector, this protector can be at excessive pressure, automatic fast cut-off power supply when undervoltage, but domestic distribution system does not generally be equipped with excessive pressure undervoltage protector. If extra increase excessive pressure undervoltage protection ware, not only incremental cost, excessive pressure undervoltage protection ware still occupies the block terminal space, needs to change current block terminal, and is comparatively loaded down with trivial details.
Disclosure of Invention
The invention provides an air switch collector aiming at the defects that the existing household power distribution system has no overvoltage and undervoltage protection function or has higher cost for upgrading the overvoltage and undervoltage functions, and the air switch collector can quickly cut off a power supply when overvoltage and undervoltage occur so as to ensure the power utilization safety.
In order to achieve the purpose, the invention adopts the following technical scheme: an overhead collector, comprising:
the alternating current acquisition module acquires analog signals in a tested loop, wherein the analog signals comprise voltage signals and current signals;
the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal;
a relay switch module;
and the microprocessor reads the digital signal of the analog signal conversion module and controls the opening and closing of the relay switch module according to the acquired voltage and/or current conditions.
The air switch collector is provided with an alternating current collecting module, wherein the alternating current collecting module collects a voltage signal and a current signal of a tested loop; the device is provided with an analog signal conversion module, and the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal which can be processed by the microprocessor; the device is provided with a microprocessor and a relay switch module, wherein the microprocessor controls the on-off of the relay switch module according to the acquired voltage condition and/or current condition of the tested loop. The microprocessor controls the relay switch module to be opened and closed according to the acquired voltage condition and/or current condition of the detected loop, specifically, the acquired voltage condition and current condition of the detected loop may be compared with a preset threshold or a threshold interval, and when the voltage condition and current condition are not within an allowable range, the relay switch module is controlled to be opened. The relay switch module is in a normally open state and is disconnected only when abnormality is detected. The frequency collected by the microprocessor can be adjusted correspondingly according to the requirement.
As an improvement, the microprocessor comprises a protection logic judgment module, the protection logic judgment module comprises an overcurrent protection module, an overvoltage protection module and an undervoltage protection module, and when at least one of overcurrent, overvoltage and undervoltage is detected, the microprocessor controls the relay switch module to be switched off. Of course, the microprocessor may also have only one of the overcurrent protection module, the overvoltage protection module and the undervoltage protection module, and although the functions are simplified, the circuit structure of the microprocessor is also simplified.
As an improvement, the overcurrent protection module acquires a current value in the tested loop, when the current value is greater than an overcurrent threshold, the microprocessor starts timing, and after time t1, the microprocessor sends a disconnection command to control the relay switch module to be disconnected, so that the tested loop is disconnected.
As an improvement, the overvoltage protection module obtains a voltage value in the tested loop, when the voltage value is greater than an overvoltage threshold, the microprocessor starts timing, and after time t2, the microprocessor sends out a disconnection command to control the relay switch module to be disconnected, so that the tested loop is disconnected.
As an improvement, the under-voltage protection module obtains a voltage value in the tested loop, when the voltage value is smaller than an under-voltage threshold, the microprocessor starts timing, and after time t3, the microprocessor processes the voltage value again to be smaller than the under-voltage threshold, and then the microprocessor sends a disconnection command to control the relay switch module to be disconnected, so as to disconnect the tested loop.
As an improvement, the alternating current acquisition module comprises a current acquisition module, the current acquisition module comprises a current transformer, a differential circuit, an RC filter circuit and a voltage reduction circuit, the current transformer converts the measured current into a small current analog signal according to a certain proportion, and the small current analog signal is processed by the differential circuit and the RC filter circuit and is accessed to the analog signal conversion module.
As an improvement, the alternating current acquisition module comprises a voltage acquisition module, the voltage acquisition module comprises a voltage reduction circuit and an RC filter circuit, and the voltage to be measured is processed by the voltage reduction circuit and then is accessed to the analog signal conversion module through the RC filter circuit.
As an improvement, the relay switch module comprises a relay, the air switch collector is directly installed in series with a traditional air switch, and the microprocessor controls the on-off state of the relay so as to control the on-off state of a tested loop.
As an improvement, the air switch collector further comprises a wireless radio frequency module, and the wireless radio frequency module is in communication connection with the microprocessor.
As an improvement, the air switch collector further comprises a storage module, and the storage module is in communication connection with the microprocessor.
As an improvement, the air switch collector further comprises an alarm indication module, and the alarm indication module is connected with the microprocessor.
As an improvement, the air switch collector further comprises a power supply module, and the power supply module provides a working power supply for the analog signal conversion module, the microprocessor and the relay switch module.
An air switch device comprises an air switch and an air switch which are connected in series, wherein the air switch is the air switch.
The air switch collector has the beneficial effects that: the microprocessor controls the on-off of the relay switch module according to the acquired voltage condition and/or current condition of the tested loop, so that the tested loop can be disconnected when abnormal conditions such as overcurrent, overvoltage or undervoltage occur in the tested loop, and the power utilization safety is ensured.
The air switch device provided by the invention adopts the air switch collector provided by the invention, and has all the beneficial effects of the air switch collector provided by the invention.
Drawings
Fig. 1 is a block diagram of a first embodiment of an air switch device according to the present invention.
Fig. 2 is a schematic circuit diagram of an ac collection module according to a first embodiment of the air switching device of the present invention.
Fig. 3 is a schematic circuit diagram of an analog signal conversion module according to a first embodiment of the air switch device of the present invention.
Fig. 4 is a schematic circuit diagram of a microprocessor of the first embodiment of the air switch device of the present invention.
Fig. 5 is a schematic circuit diagram of a power module according to a first embodiment of the air switch device of the present invention.
Fig. 6 is a schematic circuit diagram of a radio frequency module according to a first embodiment of the air switch device of the present invention.
Fig. 7 is a schematic circuit diagram of a memory block of a first embodiment of the air switch device of the present invention.
Fig. 8 is a schematic circuit diagram of an alarm indication module of a first embodiment of the air switching apparatus of the present invention.
Fig. 9 is a schematic circuit diagram of a relay switch module according to a first embodiment of the air switch device of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the invention.
Referring to fig. 1 to 8, an air switch device includes an idle opening collector and an air switch connected in series, the idle opening collector including:
the alternating current acquisition module acquires analog signals in a tested loop, wherein the analog signals comprise voltage signals and current signals;
the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal;
a relay switch module;
and the microprocessor reads the digital signal of the analog signal conversion module according to a certain frequency and controls the opening and closing of the relay switch module according to the acquired voltage and/or current conditions.
The air switch device comprises an air switch collector and an air switch controller, wherein the air switch collector comprises an alternating current collecting module which collects a voltage signal and a current signal of a tested loop; the device is provided with an analog signal conversion module, and the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal which can be processed by the microprocessor; the device is provided with a microprocessor and a relay switch module, wherein the microprocessor controls the on-off of the relay switch module according to the acquired voltage condition and/or current condition of the tested loop. The microprocessor controls the relay switch module to be opened and closed according to the acquired voltage condition and/or current condition of the detected loop, specifically, the acquired voltage condition and current condition of the detected loop may be compared with a preset threshold or a threshold interval, and when the voltage condition and current condition are not within an allowable range, the relay switch module is controlled to be opened. The relay switch module is in a normally open state and is disconnected only when abnormality is detected. The frequency collected by the microprocessor can be adjusted correspondingly according to the requirement.
Embodiment one of the air switch device
Referring to fig. 1 to 8, an air switch device includes an idle opening collector and an air switch connected in series, the idle opening collector including:
the alternating current acquisition module acquires analog signals in a tested loop, wherein the analog signals comprise voltage signals and current signals;
the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal;
a relay switch module;
and the microprocessor reads the digital signal of the analog signal conversion module according to a certain frequency and controls the opening and closing of the relay switch module according to the acquired voltage and/or current conditions.
In this embodiment, the microprocessor includes a protection logic determination module, the protection logic determination module includes an overcurrent protection module, an overvoltage protection module, and an undervoltage protection module, and when at least one of overcurrent, overvoltage, and undervoltage is detected, the microprocessor controls the relay switch module to be turned off. The protection logic judgment module adopts OR logic.
In this embodiment, the air switch is a conventional air switch with an overcurrent protection function, and is directly connected in series with the air switch collector.
In other embodiments, the air switch may also be an air switch without over-current protection.
In other implementations, the microprocessor may have only one or two of the over-current protection module, the over-voltage protection module and the under-voltage protection module, and although the functions are simplified, the circuit structure of the microprocessor is also simplified.
In this embodiment, the overcurrent protection module obtains a current value in the measured circuit, when the current value is greater than the overcurrent threshold, the microprocessor starts timing, and after time t1, the microprocessor sends a disconnection command to control the relay switch module to be disconnected, so as to disconnect the measured circuit, where the current value obtained by the microprocessor through reprocessing is still greater than the overcurrent threshold.
In this embodiment, the overvoltage protection module obtains a voltage value in the tested loop, when the voltage value is greater than the overvoltage threshold, the microprocessor starts timing, and after time t2, the microprocessor sends a disconnection command to control the relay switch module to be disconnected, so as to disconnect the tested loop, where the voltage value obtained by the microprocessor through reprocessing is still greater than the overvoltage threshold.
In this embodiment, the under-voltage protection module obtains a voltage value in the tested loop, when the voltage value is smaller than the under-voltage threshold, the microprocessor starts timing, and after time t3, the microprocessor processes the voltage value again to be smaller than the under-voltage threshold, and then the microprocessor sends a disconnection command to control the relay switch module to be disconnected, thereby disconnecting the tested loop.
In this embodiment, the parameters such as the overcurrent threshold, the overvoltage threshold, the undervoltage threshold, and the like may be preset values in a factory, or may be set freely by a user, so that the user can adjust the relevant parameters according to actual conditions.
In this embodiment, the ac collection module includes a current collection module, the current collection module includes a current transformer, a differential circuit, an RC filter circuit, and a voltage reduction circuit, the current transformer converts the measured current into a low-current analog signal according to a certain proportion, and the low-current analog signal is processed by the differential circuit and the RC filter circuit and is accessed to the analog signal conversion module.
In this embodiment, exchange the collection module and include voltage collection module, voltage collection module includes step-down circuit and RC filter circuit, and the voltage that is surveyed is through the step-down processing back, handles access analog signal conversion module through RC filter circuit again.
In this embodiment, the analog signal conversion module uses an RN8209D chip, and by reasonably configuring the chip, the analog signals of the voltage and the current processed by the ac signal acquisition module are converted into digital signals that can be processed by the microprocessor.
In this embodiment, the microprocessor communicates with the RN8209D chip in the analog signal conversion module through the SPI protocol. The microprocessor reads the digital signal converted by the electric metering chip according to a fixed frequency, and determines whether the relay switch module needs to be controlled to disconnect the circuit to protect the electric appliance or not by calculating and analyzing the states of voltage and current.
In other embodiments, the frequency of microprocessor acquisition may be adjusted accordingly as desired, such as at a higher frequency during peak periods, at a lower frequency during valley periods, and so forth.
In this embodiment, the relay switch module includes a relay, the air switch collector is directly installed in series with a conventional air switch, and the microprocessor controls the on-off state of the relay, so as to control the on-off state of the tested loop.
In the embodiment, one of GPIO ports of the microprocessor is connected with a relay in the relay switch module through an amplifying circuit, a contact of the relay is connected with a traditional air switch in series, and the microprocessor can send a set signal to control the on-off state of the relay so as to control the on-off state of a tested loop.
In this embodiment, the air switch collector further includes a wireless radio frequency module, and the wireless radio frequency module is in communication connection with the microprocessor.
In this embodiment, the NF-04-MI chip in the RF module communicates with the microprocessor through the SPI protocol. The microprocessor sends the circuit state parameters such as current, voltage, active electric energy, reactive electric energy and other data to the NF-04-MI chip in the wireless radio frequency module through the SPI bus, and then the data is sent to the remote control terminal or the communication service terminal. The wireless radio frequency module can also receive a command sent by a user through the remote control terminal and send the received command to the microprocessor, and the microprocessor judges whether the user command controls the on-off of the tested loop or sets corresponding parameters. The NF-04-MI adopts a Zigee wireless communication protocol to transmit data, the frequency bandwidth is 2400-2483.5MHz, and the transmission rate is 500 kps.
In this embodiment, the air switch collector further includes a storage module, and the storage module is in communication connection with the microprocessor.
In this embodiment, the EEPROM in the memory module communicates with the microprocessor via the I2C protocol. The microprocessor may read configuration parameters from the memory module, including but not limited to an over-voltage threshold, an under-voltage threshold, an over-current threshold, a sampling frequency, etc. The microprocessor can also store the circuit state parameters such as voltage, current, active power and the like in the EEPROM of the storage module for a period of time for the user or professional to inquire and analyze.
In this embodiment, the air switch collector further includes an alarm indication module, and the alarm indication module is connected to the microprocessor.
In this embodiment, the anode of the LED indicator in the alarm indication module is connected to one of GPIO ports of the microprocessor, and the cathode is connected to the common ground to indicate the current working status.
In this embodiment, the air switch collector further includes a power module, and the power module provides a working power supply for the analog signal conversion module, the microprocessor and the relay switch module.
In this embodiment, the power module may convert AC220V into DC3.3V/5V, which provides working power for the analog signal conversion module, the microprocessor, and the relay switch module.
The air switch device of the embodiment is characterized in that an air switch collector is connected in series with a traditional air switch, and the air switch collector comprises an alternating current signal collection module, an analog signal conversion module, a microprocessor, a relay switch module, a wireless radio frequency module, a storage module, an alarm indication module and a power supply module. The alternating current signal acquisition module of the alternating current acquisition module comprises a current transformer, a differential circuit, an RC filter circuit and a voltage reduction circuit. The analog signal conversion module adopts an RN8209D chip; the microcontroller adopts an STM32F030C8T6 high-performance microcontroller and comprises a logic protection judgment module; the contact of the relay switch module is connected with the traditional air switch in series, and the on-off state of the tested loop can be controlled. The wireless radio frequency module adopts an NF-04-FI chip; the storage module adopts an EEPROM with the capacity of 512 Kit; the alarm indicating module indicates the working state of the equipment by using an LED lamp.
In the air switch device of the embodiment, in the alternating current signal acquisition module, a current transformer converts a measured current into a low-current analog signal according to a certain proportion, and the low-current analog signal is processed by a differential circuit and an RC filter circuit and is accessed to an analog signal conversion module; the measured voltage is processed by the voltage reduction circuit and then is connected to the analog signal conversion module after being processed by the RC filter circuit.
In the air switch device of the present embodiment, the current signal and the voltage signal collected by the ac signal collection module are input to the RN8209D chip in the analog signal conversion module, the analog gain of the current channel a of the chip is configured to be 16 times, and the analog gain of the voltage channel is configured to be 1 time; the SCSN, SCLK, SDO and SDI pins of the chip are respectively connected with the PA4, PA5, PA6 and PA7 pins of the microprocessor, and are communicated with an SPI protocol. The RN8209D converts the received current signal and voltage signal sent by the ac signal acquisition module into digital signals through a 24-bit high-precision ADC, and stores the digital signals in a buffer of the chip.
In the air switch device of the embodiment, the microprocessor communicates with the RN8209D chip in the analog signal conversion module through the SPI protocol. The microprocessor reads the digital signal converted by the electric metering chip according to a fixed frequency to obtain current and voltage values, enters a protection logic judgment module, and judges whether the relay switch module needs to be controlled to disconnect a circuit to protect an electric appliance according to the following logic: a. overcurrent protection: and the microprocessor reads and processes the current digital signal converted by 8209D in the analog signal conversion module according to a certain frequency to obtain the current value in the tested loop. When the current value is larger than the overcurrent threshold value, the microprocessor starts timing. After time t1, the microprocessor sends out a relay disconnection command to control the relay in the relay switch module to be electrically shocked and disconnected, so that the tested loop is disconnected and the tested loop is prevented from overflowing. b. Overvoltage protection: and the microprocessor reads and processes the voltage digital signal converted by 8209D in the analog signal conversion module according to a certain frequency to obtain a voltage value in the tested loop. When the voltage value is larger than the overvoltage threshold value, the microprocessor starts to time. After time t2, the microprocessor sends out a relay disconnection command to control the relay in the relay switch module to be electrically shocked and disconnected, so that the tested loop is disconnected and the tested loop is prevented from being over-voltage. c. Undervoltage protection: and the microprocessor reads and processes the voltage digital signal converted by 8209D in the analog signal conversion module according to a certain frequency to obtain a voltage value in the tested loop. And when the voltage value is smaller than the undervoltage threshold value, the microprocessor starts timing. After time t3, the microprocessor processes the current value obtained by the microprocessor again and still is smaller than the undervoltage threshold value, then the microprocessor sends out a relay disconnection command to control the relay in the relay switch module to be electrically shocked and disconnected, and further the tested loop is disconnected to prevent the tested loop from being undervoltage. The three pieces of abc protection logics are in an OR relationship, the three pieces of abc protection logics do not influence each other, and the tested loop is disconnected as long as one protection logic is satisfied. Parameters such as an overcurrent threshold, an overvoltage threshold, an undervoltage threshold and the like can be preset values in a factory or can be freely set by a user, and the user can conveniently adjust related parameters according to actual conditions.
In the air switch device of the embodiment, the pin P3 of the microprocessor is connected with the relay in the relay switch module through the amplifying circuit, the contact of the relay is connected with the traditional air switch in series, and the microprocessor can send a set signal to control the on-off state of the relay so as to control the on-off state of the tested loop.
In the air switch device of the present embodiment, the SEL, SCLK, MOSI, MISO pins of the NF-04-MI chip in the radio frequency module are connected to the P12, P13, P14, P15 pins of the microprocessor, respectively, for communicating with the SPI protocol. The microprocessor sends circuit state parameters such as current, voltage, active electric energy, reactive electric energy and other data to an NF-04-MI chip in the wireless radio frequency module through an SPI bus, and then the data is sent to a remote control terminal or a communication service terminal; the wireless radio frequency module can also receive a command sent by a user through the remote control terminal and send the received command to the microprocessor, and the microprocessor judges whether the user command controls the on-off of the tested loop or sets corresponding parameters. The NF-04-MI adopts a Zigee wireless communication protocol to transmit data, the frequency bandwidth is 2400-2483.5MHz, and the transmission rate is 500 kps.
In the air switch device of the present embodiment, the SCL pin and the SDA pin of the EEPROM in the memory module are respectively connected to the P8 pin and the P9 pin of the microprocessor, and communicate with the microprocessor through the I2C protocol. The microprocessor may read configuration parameters from the memory module, including but not limited to an over-voltage threshold, an under-voltage threshold, an over-current threshold, a sampling frequency, etc. The microprocessor can also store the circuit state parameters such as voltage, current, active power and the like in the EEPROM of the storage module for a period of time for the user or professional to inquire and analyze.
In the air switch device of the present embodiment, the anode of the LED indicator in the alarm indication module is connected to the microprocessor P1, and the cathode is connected to the common ground for indicating the current working status.
In the air switch device of the embodiment, the power supply module can convert the AC220V into DC3.3V/5V, so as to provide working power for the analog signal conversion module, the microprocessor and the relay switch module.
The first embodiment of the air switch device has the following beneficial effects: the air switch collector is directly installed in series with the traditional air switch, so that a user can upgrade the traditional air switch in a low cost and simple mode, single overcurrent protection of the traditional air switch is transformed into all-around protection of overcurrent, overvoltage, undervoltage and the like on a tested loop, and the electricity safety is ensured to the maximum extent; in addition, a user can remotely acquire detailed power utilization information, remotely control the on-off of a tested loop, and conveniently and safely utilize power.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto but is intended to cover various modifications and changes, including but not limited to the details shown in the drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the following claims.
Claims (10)
1. An empty collector that opens, its characterized in that: the air switch collector comprises:
the alternating current acquisition module acquires analog signals in a tested loop, wherein the analog signals comprise voltage signals and current signals;
the analog signal conversion module converts the analog signal acquired by the alternating current acquisition module into a digital signal;
a relay switch module;
and the microprocessor reads the digital signal of the analog signal conversion module and controls the opening and closing of the relay switch module according to the acquired voltage and/or current conditions.
2. An air switch collector according to claim 1, wherein: the microprocessor comprises a protection logic judgment module, the protection logic judgment module comprises an overcurrent protection module, an overvoltage protection module and an undervoltage protection module, and when at least one of overcurrent, overvoltage and undervoltage is detected, the microprocessor controls the relay switch module to be switched off.
3. An air switch collector according to claim 2, wherein: the overcurrent protection module acquires a current value in the tested loop, when the current value is greater than an overcurrent threshold value, the microprocessor starts timing, and after time t1, the microprocessor processes the current value again to obtain a current value which is still greater than the overcurrent threshold value, the microprocessor sends a disconnection command to control the relay switch module to be disconnected, and then the tested loop is disconnected.
4. An air switch collector according to claim 2, wherein: the overvoltage protection module obtains a voltage value in the tested loop, when the voltage value is larger than an overvoltage threshold, the microprocessor starts timing, and after time t2, the microprocessor sends a disconnection command to control the relay switch module to be disconnected, and further the tested loop is disconnected, and the voltage value obtained by reprocessing by the microprocessor is still larger than the overvoltage threshold.
5. An air switch collector according to claim 2, wherein: and the undervoltage protection module acquires a voltage value in the tested loop, when the voltage value is smaller than an undervoltage threshold, the microprocessor starts timing, and after time t3, the microprocessor processes the voltage value again to obtain a voltage value still smaller than the undervoltage threshold, and then the microprocessor sends a disconnection command to control the relay switch module to be disconnected, so that the tested loop is disconnected.
6. An air switch collector according to claim 1, wherein: the alternating current acquisition module comprises a current acquisition module, the current acquisition module comprises a current transformer, a differential circuit, an RC filter circuit and a voltage reduction circuit, the current transformer converts the measured current into a small current analog signal according to a certain proportion, and the small current analog signal is processed by the differential circuit and the RC filter circuit and is accessed to the analog signal conversion module.
7. An air switch collector according to claim 1, wherein: the alternating current acquisition module comprises a voltage acquisition module, the voltage acquisition module comprises a voltage reduction circuit and an RC filter circuit, and the measured voltage is processed by the voltage reduction circuit and then is processed by the RC filter circuit to be connected to the analog signal conversion module.
8. An air switch collector according to claim 1, wherein: the relay switch module comprises a relay, the air switch collector is directly installed in series with a traditional air switch, and the microprocessor controls the on-off state of the relay so as to control the on-off state of the tested loop.
9. An air switch collector according to claim 1, wherein: the air switch collector also comprises a wireless radio frequency module which is in communication connection with the microprocessor; alternatively, the first and second electrodes may be,
the air switch collector also comprises a storage module which is in communication connection with the microprocessor; alternatively, the first and second electrodes may be,
the air switch collector also comprises an alarm indication module, and the alarm indication module is connected with the microprocessor; alternatively, the first and second electrodes may be,
the air switch collector further comprises a power module, and the power module provides a working power supply for the analog signal conversion module, the microprocessor and the relay switch module.
10. The utility model provides an air switch device, includes series connection's empty collector and air switch of opening, its characterized in that: the idle-switch collector is the idle-switch collector of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010704936.8A CN111817255A (en) | 2020-07-21 | 2020-07-21 | Air switch collector and air switch device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010704936.8A CN111817255A (en) | 2020-07-21 | 2020-07-21 | Air switch collector and air switch device |
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| CN111817255A true CN111817255A (en) | 2020-10-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504406A (en) * | 2021-06-22 | 2021-10-15 | 昇辉控股有限公司 | Zero-crossing detection method and intelligent switch with zero-crossing detection function |
| CN114336516A (en) * | 2021-12-27 | 2022-04-12 | 深圳供电局有限公司 | Control method and system of intelligent air switch |
| WO2023245917A1 (en) * | 2022-06-23 | 2023-12-28 | 宁波中车时代传感技术有限公司 | Overcurrent detection circuit and method suitable for alternating currents |
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2020
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| CN113504406A (en) * | 2021-06-22 | 2021-10-15 | 昇辉控股有限公司 | Zero-crossing detection method and intelligent switch with zero-crossing detection function |
| CN113504406B (en) * | 2021-06-22 | 2024-01-02 | 昇辉控股有限公司 | Zero-crossing detection method and intelligent switch with zero-crossing detection function |
| CN114336516A (en) * | 2021-12-27 | 2022-04-12 | 深圳供电局有限公司 | Control method and system of intelligent air switch |
| CN114336516B (en) * | 2021-12-27 | 2024-03-19 | 深圳供电局有限公司 | Control method and system of intelligent air switch |
| WO2023245917A1 (en) * | 2022-06-23 | 2023-12-28 | 宁波中车时代传感技术有限公司 | Overcurrent detection circuit and method suitable for alternating currents |
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