CN113721108B - Acquisition equipment, low-power consumption control method and transient wave recording type fault indicator - Google Patents
Acquisition equipment, low-power consumption control method and transient wave recording type fault indicator Download PDFInfo
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- CN113721108B CN113721108B CN202110789900.9A CN202110789900A CN113721108B CN 113721108 B CN113721108 B CN 113721108B CN 202110789900 A CN202110789900 A CN 202110789900A CN 113721108 B CN113721108 B CN 113721108B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001052 transient effect Effects 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 78
- 238000012545 processing Methods 0.000 claims description 14
- 230000010354 integration Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000004622 sleep time Effects 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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Abstract
The embodiment of the invention provides acquisition equipment, a low-power consumption control method and a transient wave recording type fault indicator, wherein the acquisition equipment comprises the following components: the circuit has the electrical signal detection circuit, the heavy current signal wake-up circuit and microcontroller, heavy current signal wake-up circuit respectively with the power with microcontroller is connected, the circuit has the electrical signal detection circuit to be used for monitoring whether the circuit is electrified and output first level signal extremely microcontroller, heavy current signal wake-up circuit is used for monitoring whether the circuit has the heavy current and output second level signal extremely microcontroller, microcontroller is according to first level signal and second level signal get into different consumption modes and work, has solved traditional technique interval sampling method and has taken place trouble and leak judgement and microcontroller entering the unable normal problem of sampling of sleep mode of lower consumption.
Description
Technical Field
The invention relates to the technical field of line fault detection, in particular to acquisition equipment, a low-power consumption control method and a transient wave recording type fault indicator.
Background
The transient wave recording type fault indicator device consists of an acquisition unit and a collecting unit, is arranged on a distribution line, can monitor various parameters of line operation, detect various fault problems and send fault detection data to a distribution main station. The collecting unit is arranged on the distribution line, can detect various line fault problems, collects various line fault problem data and sends the data to the collecting unit. The acquisition unit can be switched to the standby battery to supply power when the power is insufficient on the line, and the electric quantity of the standby battery is limited and is not changed, so that the service life of the product can be ensured only by reducing the whole power consumption of the acquisition unit.
There are two ways of conventional techniques, one is the interval sampling mode. The acquisition unit enters a sleep mode or a working mode according to the preset sampling time length and the sleep time length, the microcontroller enters the sleep mode and the sampling module is closed in the sleep mode, the microcontroller exits the sleep mode and the sampling module starts to sample in the working mode, and the purpose of reducing average power consumption is achieved by reasonably configuring the ratio of the sampling time length to the sleep time length. However, when a short-circuit fault occurs on the line, because the fault current is fast in mutation and short in duration, if the acquisition unit is in the sleep time, the acquisition unit cannot capture the short-circuit fault current, and the problem of fault missed judgment occurs.
Another way is sample threshold wakeup. The method comprises the steps of presetting a high-value awakening threshold value and a low-value awakening threshold value of a sampling module, and when the load current on a line is suddenly changed, the sampling module automatically triggers a threshold terminal when detecting that a sampling result is higher or lower than the preset threshold value, and awakening a micro control unit to exit a sleep mode. The microcontroller has a threshold wake-up function in a sleep mode, so that the type selection requirement of the microcontroller is improved, and when the microcontroller enters the sleep mode with lower power consumption, a sampling module, a timer and the like of the sampling unit cannot work normally.
Disclosure of Invention
The embodiment of the invention provides acquisition equipment, a low-power consumption control method and a transient wave recording type fault indicator, which are used for solving the problems that a fault missed judgment occurs in a traditional technology interval sampling method and a microcontroller enters a sleep mode with lower power consumption and cannot sample normally.
An acquisition device comprising: the power supply, the circuit have electric signal detection circuit, the high-current signal wake-up circuit and the microcontroller, the said high-current signal wake-up circuit is connected with said power supply and said microcontroller separately, the said circuit has electric signal detection circuit to connect with said power supply and said microcontroller separately;
the power supply is used for supplying power to the circuit with an electric signal detection circuit, the high-current signal wake-up circuit and the microcontroller;
The circuit is provided with an electric signal detection circuit which is used for monitoring whether the circuit is electrified and outputting a first level signal to the microcontroller;
The high-current signal wake-up circuit is used for monitoring whether the circuit has high current or not and outputting a second level signal to the microcontroller;
The microcontroller is used for:
When the first level signal is received, determining that the detected line is powered on;
When the second level signal is received, determining that a detected line has large current;
Wherein, when the line is not powered on, the microcontroller maintains a lowest power consumption mode; when the line is powered up and there is no high current, the microcontroller remains in medium power mode; the microcontroller maintains the highest power consumption mode when the line is powered up and there is a large current.
A low power consumption control method applied to a microcontroller of an acquisition device as described above, comprising:
When a first level signal sent by the circuit with electric signal detection circuit is received, determining that the detected circuit is electrified;
when a second level signal sent by the high-current signal wake-up circuit is received, determining that a detected line has high current;
When the line is not powered on, the microcontroller maintains a minimum power consumption mode; when the line is powered up and there is no high current, the microcontroller remains in medium power mode; the microcontroller maintains the highest power consumption mode when the line is powered up and there is a large current.
A transient wave recording type fault indicator comprising a collecting device and the collecting device as described above, the collecting device being connected with the collecting device.
According to the acquisition equipment, the low-power consumption control method and the transient wave recording type fault indicator, when the microcontroller enters the sleep mode, the characteristics that the circuit is provided with the electric signal detection circuit and the high-current signal wake-up circuit, and the IO interface is interrupted to continue working when the microcontroller enters the deep sleep mode are utilized, the running condition of the circuit can be continuously monitored when the microcontroller enters the sleep mode, the microcontroller can be waken to enter different power consumption working modes according to the monitored signals on the circuit, the problem that various faults and fault data on the circuit cannot be captured under the condition that the microcontroller enters the sleep mode and the sampling module is closed in the prior art is solved, and the acquisition equipment can be operated in a better low-power consumption mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an acquisition device in an embodiment of the invention;
FIG. 2 is a block diagram of a transient recording mode fault indicator in accordance with one embodiment of the present invention;
FIG. 3 is a block diagram of an acquisition device in an embodiment of the invention;
FIG. 4 is a circuit diagram of a wake-up circuit for a high current signal according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a circuit with an electrical signal detection circuit in accordance with an embodiment of the present invention;
FIG. 6 is a flow chart of a low power control method according to an embodiment of the invention;
FIG. 7 is a flowchart of controlling the operation mode of the collecting device according to the detection result in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, as shown in fig. 2, a transient recording mode fault indicator 100 includes an acquisition device 1 and a sink device 2, which are connected.
The acquisition equipment is arranged on the distribution line, can monitor various fault information and line running condition information on the line, acquires and captures various fault characteristic data, and sends the fault information and the fault characteristic data to the aggregation equipment;
And the collecting equipment receives the fault information, the fault characteristic data and the line monitoring data information and transmits the line running condition information, the fault characteristic data, the waveform file and other data information to the power distribution main station.
In one embodiment, as shown in fig. 1, the collecting apparatus includes: the power supply 14, the circuit with electric signal detection circuit 13, the high-current signal wake-up circuit 12 and the microcontroller 11, wherein the high-current signal wake-up circuit is respectively connected with the power supply and the microcontroller, and the circuit with electric signal detection circuit is respectively connected with the power supply and the microcontroller;
the power supply is used for supplying power to the circuit with an electric signal detection circuit, the high-current signal wake-up circuit and the microcontroller;
The circuit is provided with an electric signal detection circuit which is used for monitoring whether the circuit is electrified and outputting a first level signal to the microcontroller;
The high-current signal wake-up circuit is used for monitoring whether the circuit has high current or not and outputting a second level signal to the microcontroller;
The microcontroller is used for:
When the first level signal is received, determining that the detected line is powered on;
When the second level signal is received, determining that a detected line has large current;
Wherein, when the line is not powered on, the microcontroller maintains a lowest power consumption mode; when the line is powered up and there is no high current, the microcontroller remains in medium power mode; the microcontroller maintains the highest power consumption mode when the line is powered up and there is a large current.
The microcontroller can switch among the three power consumption modes of the lowest power consumption mode, the medium power consumption mode and the highest power consumption mode according to the first level output by the circuit with the electric signal detection circuit and the second level output by the high-current signal wake-up circuit, and the power consumption mode of the microcontroller is reasonably determined, so that the acquisition equipment can work normally in a reasonable low power consumption mode.
In one embodiment, as shown in fig. 3, the microcontroller comprises: AD port 112, IO first port 111, and IO second port 113;
The high-current signal wake-up circuit is connected with the AD port and the IO first port; the circuit is provided with an electric signal detection circuit which is connected with the IO second port;
The microcontroller can continue to work without being affected by the IO port under the condition of the sleep mode, and can receive the second level sent by the high-current signal wake-up circuit by utilizing the IO first port of the microcontroller, and the microcontroller can be switched from the sleep mode to the normal working mode at the moment; and receiving the first level sent by the circuit with the electric signal detection circuit by utilizing the IO second port of the microcontroller, and switching the microcontroller from the sleep mode to the normal working mode at the moment.
In one embodiment, as illustrated in fig. 2, the high current signal wake-up circuit comprises: a rogowski coil signal integration processing circuit 121, a threshold current detection circuit 122, and a rogowski coil signal input port 123; the Rogowski coil signal input port is connected with the Rogowski coil signal integration processing circuit; the rogowski coil signal integration processing circuit is respectively connected with the power supply, the threshold current detection circuit and the microcontroller; the threshold current detection circuit is respectively connected with the power supply and the microcontroller.
The integrated action of the Rogowski coil signal integration processing circuit can restore a differential current signal output by the Rogowski coil, and meanwhile, the Rogowski coil signal integration processing circuit is also connected with an AD port of the microcontroller to provide current signal input for a current detection and protection algorithm.
In one embodiment, as shown in fig. 4, the rogowski coil integration processing circuit includes: the micro-power consumption reference chip comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a micro-power consumption operational amplifier U1 and a micro-power consumption reference chip U2;
The first end of the resistor R2 is connected with the first terminal of the Rogowski coil signal input port, and the second end of the resistor R2 is connected with the fourth pin of the micro-power-consumption operational amplifier U1; the first end of the resistor R4 is connected with the second terminal of the Rogowski coil signal input port, and the second end of the resistor R4 is connected with the third pin of the micro-power-consumption operational amplifier U1; the first pin of the micro-power-consumption operational amplifier U1 is connected with the first end of the resistor R3, the second pin of the micro-power-consumption operational amplifier U1 is grounded, and the fifth pin of the micro-power-consumption operational amplifier U1 is connected with the first end of the capacitor C3; the capacitor C1 is connected in parallel with the resistor R1, the first end of the capacitor C1 and the first end of the resistor R1 are connected together to form a node between the second end of the resistor R2 and the fourth pin of the micro-power-consumption operational amplifier U1, and the second end of the capacitor C1 and the second end of the resistor R1 are connected together to form a node between the first pin of the micro-power-consumption operational amplifier U1 and the first end of the resistor R3; the second end of the capacitor C3 is grounded; the second end of the resistor R3 is connected with the AD port of the microcontroller; a first end of the capacitor C2 is connected with a node between a second end of the resistor R3 and the AD port of the microcontroller, and a second end of the capacitor C2 is grounded; the power supply is connected with a node between a fifth pin of the micro-power-consumption operational amplifier U1 and the first end of the capacitor C3; a first end of the capacitor C4 is connected with a node between a second terminal of the Rogowski coil signal input port and a first end of the resistor R4, and a second end of the capacitor C4 is grounded; the first end of the capacitor C5 is connected with the power supply, and the second end of the capacitor C5 is connected with a node between the second end of the capacitor C4 and the ground; a first pin of the micro-power consumption reference chip U2 is connected with a node between the power supply and the first end of the capacitor C5, a second pin of the micro-power consumption reference chip U2 is connected with a node between the second terminal of the Rogowski coil signal input port and the first end of the capacitor C4, and a third pin of the micro-power consumption reference chip U2 is connected with a node between the second end of the capacitor C4 and the ground;
In one embodiment, as shown in fig. 4, the threshold current detection circuit includes: resistor R5, resistor R6, resistor R7, capacitor C6, capacitor C7, capacitor C8, and micro-power consumption comparator U3;
The first end of the fourth resistor R5 is connected with the Rogowski coil signal integration processing circuit, and the second end of the fourth resistor R5 is connected with the first end of the sixth resistor R7; the second end of the sixth resistor R7 is grounded; the first end of the fourth capacitor C8 is connected to a node between the second end of the fourth resistor R5 and the first end of the sixth resistor R7, and the second end of the fourth capacitor C8 is connected to a node between the second end of the sixth resistor R7 and ground; the first end of the second capacitor C6 is connected with the power supply, and the second end of the second capacitor C6 is grounded; a first end of the fifth resistor R6 is connected to a fifth pin of the micro-power consumption comparator U3, and a second end of the fifth resistor R6 is connected to a first end of the third capacitor C7; the second end of the third capacitor C7 is grounded; a first pin of the micro-power consumption comparator U3 is connected with the IO first port of the microcontroller, a second pin of the micro-power consumption comparator U3 is grounded, and a third pin of the micro-power consumption comparator U3 is connected with a node between the first end of the sixth resistor R7 and the first end of the fourth capacitor C8; a fourth pin of the micro-power consumption comparator U3 is connected with a node between the second end of the fifth resistor R6 and the first end of the third capacitor C7, and a sixth pin of the micro-power consumption comparator U3 is connected with a node between the first end of the second capacitor C6 and the power supply;
The fourth resistor R5, the sixth resistor R7 and the fourth capacitor C8 output the input current signal to the third pin of the micro-power consumption comparator U3 after the voltage division filtering processing; the internal reference voltage of the micro-power consumption comparator U3 is filtered by the fifth resistor R6 and the third capacitor C7 and then is output to a fourth pin of the micro-power consumption comparator U3, so that the reference voltage reference setting of the micro-power consumption comparator U3 is completed; and when the voltage of the third pin of the micro-power consumption comparator U3 is larger than the voltage of the fourth pin, the first pin outputs the second level signal to the IO second port of the microcontroller.
The resistor R5, the resistor R7 and the capacitor C8 complete the voltage division filtering processing of the input current signal, and the processed signal is output to a third pin of the micro-power consumption comparator; the resistor R6 and the capacitor C7 complete the filtering processing of the internal reference voltage, and the processed signal is output to a fourth pin of the micro-power consumption comparator; when the voltage of the third pin of the micro-power consumption comparator is larger than the voltage of the fourth pin, the first pin of the micro-power consumption comparator outputs the second level to the IO first port of the microcontroller, namely, the detected current signal reaches the set threshold value.
The IO first port of the microcontroller has an interrupt function, receives the second level signal, and can wake up the microcontroller from a sleep mode to enter a normal working mode in an interrupt mode.
In one embodiment, as shown in fig. 3, the circuit has an electrical signal detection circuit comprising: the CT power-taking rectifying and protecting circuit 135, the power-down signal detecting circuit 131, the system power supply converting circuit 132, the CT power-taking input port 134 and the primary battery input port 133;
The CT power-taking rectifying and protecting circuit is connected with the CT power-taking input port, the power-down signal detecting circuit and the system power supply converting circuit; the power-down signal detection circuit is connected with a node between the CT power-taking rectifying and protecting circuit and the system power supply conversion circuit, and is respectively connected with the power supply and the microcontroller; the system power supply conversion circuit is connected with the power supply and the primary battery input port.
In one embodiment, as shown in fig. 5, the power down signal detection circuit includes: resistor R9, resistor R10, resistor R11, capacitor C11 and NMOS transistor Q1;
The first end of the first resistor R9 is connected with a node between the CT electricity taking rectifying and protecting circuit and the system power supply converting circuit, and the second end of the first resistor R9 is connected with the first end of the first capacitor C11; the second end of the first capacitor C11 is grounded; a first end of the third resistor R11 is connected to a node between the second end of the first resistor R9 and the first end of the first capacitor C11, and a second end of the third resistor R11 is connected to a node between the second end of the first capacitor C11 and ground; the grid electrode of the NMOS tube Q1 is connected with a node between the second end of the first resistor R9 and the first end of the first capacitor C11, the source electrode of the NMOS tube Q1 is connected with a node between the second end of the first capacitor C11 and the ground, and the drain electrode of the NMOS tube Q1 is connected with the second end of the second resistor R10; the first end of the second resistor R10 is connected with the power supply; an IO second port of the microcontroller is connected with a node between the second resistor R10 and the drain electrode of the NMOS tube Q1;
when the circuit is electrified, the voltage output by the CT electricity taking rectifying and protecting circuit is input to the grid electrode and the source electrode of the NMOS tube after being subjected to voltage division filtering by the first resistor R9, the third resistor R11 and the first capacitor C11, and when the VGS voltage of the NMOS tube reaches an opening threshold value, the NMOS tube is conducted, and the first level signal is output to the IO first port of the microcontroller.
When an input current exists in the circuit, the voltage of a CT power-taking input port passes through the CT power-taking rectifying and protecting circuit and is input to the G-S port of the NMOS tube Q1 after being divided and filtered by the resistor R9, the resistor R11 and the capacitor C11, and when the VGS voltage of the NMOS tube Q1 reaches an opening threshold value, the NMOS tube Q1 is in a conducting state, and at the moment, a first level is output to the IO second port of the microcontroller to indicate that the circuit has power; when no current is input to the circuit, no voltage is applied to the CT power-taking input port, the VGS voltage of the NMOS tube Q1 is 0, the NMOS tube Q1 cannot be conducted at the moment, and the first level cannot be sent to the microcontroller.
When the IO second port of the microcontroller receives the first level, the IO second port judges that the circuit is electrified at the moment, and the IO second port is awakened from a sleep mode to enter a normal working mode by an interrupt mode; and when the IO second port of the microcontroller does not receive the first level, the IO second port of the microcontroller judges that the circuit has no current at the moment and can continue to be in a re-sleep mode.
In one embodiment, as shown in fig. 5, the system power conversion circuit includes: diode D1, diode D2, capacitor C9, capacitor C10, power management chip U4;
The anode of the diode D1 is connected with the first terminal of the primary battery input port, and the cathode of the diode D1 is connected with the anode of the capacitor C10; the negative electrode of the capacitor C10 is grounded; the anode of the diode D2 is connected with a node between the CT electricity taking rectifying and protecting circuit and the power down signal detecting circuit, and the cathode of the diode D2 is connected with a node between the cathode of the diode D1 and the anode of the capacitor C10; the first end of the capacitor C9 is connected with the power supply, and the second end of the capacitor C9 is grounded; the first pin of the power management chip U4 is connected to a node between the second end of the capacitor C9 and ground, the second pin of the power management chip U4 is connected to a node between the first end of the capacitor C9 and the power supply, and the third pin of the power management chip U4 is connected to a node between the cathode of the diode D1 and the anode of the capacitor C10;
The system power supply conversion circuit realizes that a system power supply can stably provide voltage.
In one embodiment, as shown in fig. 5, the CT power-taking rectifying and protecting circuit includes: diode D3, diode D4, diode D5, diode D6, CT input over-voltage clamp module P1;
The first end of the CT input over-voltage clamping module P1 is connected with the second terminal of the CT power taking input port, and the second end of the CT input over-voltage clamping module P1 is connected with the first terminal of the CT power taking input port; the anode of the diode D3 is connected with a node between the second terminal of the CT power taking input port and the first end of the CT input overvoltage clamping module P1, and the cathode of the diode D3 is connected with a node between the system power supply conversion circuit and the power failure signal detection circuit; the anode of the diode D4 is grounded, and the cathode of the diode D4 is connected with a node between the first end of the CT input overvoltage clamping module P1 and the anode of the diode D3; the anode of the diode D6 is connected with a node between the anode of the diode D4 and the ground, and the cathode of the diode D6 is connected with a node between the second end of the CT input overvoltage clamping module P1 and the first end terminal of the CT power-taking input port; the anode of the diode D5 is connected with a node between the second end of the CT input overvoltage clamping module P1 and the first end terminal of the CT power-taking input port, and the cathode of the diode D5 is connected with the cathode of the diode D3;
The diode D3, the diode D4, the diode D5, and the diode D6 form an ac full-wave rectifying circuit.
In an embodiment, as shown in fig. 6, a low power consumption control method is provided, which is applied to a microcontroller in the acquisition device, and includes the following steps S101 to S103:
S101, when a first level signal sent by a circuit with an electric signal detection circuit is received, determining that the detected circuit is electrified;
s102, when a second level signal sent by a high-current signal wake-up circuit is received, determining that a detected line has high current;
s103, controlling the working mode of the acquisition equipment according to the detection result of whether power is on or not and the detection result of whether large current exists or not;
As shown in fig. 7, the controlling the working mode of the collecting device according to the detection result of whether to power up and the detection result of whether to have a large current includes:
s201, when the circuit is not powered on, the microcontroller keeps a lowest power consumption mode;
S202, when the line is powered on and no high current exists, the microcontroller keeps a medium power consumption mode;
S203, when the line is powered up and there is a large current, the microcontroller maintains the highest power consumption mode.
In an embodiment, the step of the microcontroller switching from the highest power consumption mode to the medium power consumption mode or the lowest power consumption mode comprises:
In the highest power consumption mode, sampling and updating a voltage current value in real time, and switching from the highest power consumption mode to the medium power consumption mode when the current of the line is detected to be smaller than a preset current value and the duration time is longer than a preset first time;
And in the highest power consumption mode, sampling and updating the voltage current value in real time, detecting that the line is in power failure and the duration is longer than a preset second time, and switching from the highest power consumption mode to the lowest power consumption mode.
Wherein the preset first time is the time required by the microcontroller to switch from the highest power consumption mode to the medium power consumption mode; the preset second time is the time required for the microcontroller to switch from the highest power consumption mode to the lowest power consumption mode.
In an embodiment, the step of the microcontroller switching from the medium power consumption mode to the highest power consumption mode comprises:
in the medium power consumption mode, when the first level signal and/or the second level signal are/is received, switching from the medium power consumption mode to the highest power consumption mode;
and in the medium power consumption mode, the detected line current is sampled at regular intervals to be larger than a preset current value and the duration is larger than a preset third time, or the detected line power failure duration is sampled at regular intervals to be larger than the preset third time, and the medium power consumption mode is switched to the highest power consumption mode.
Wherein the preset third time is the time required for the microcontroller to switch from the medium power consumption mode to the highest power consumption mode.
In an embodiment, the step of the microcontroller switching from the lowest power consumption mode to the highest power consumption mode comprises:
When the second level signal is received in the lowest power consumption mode, switching from the lowest power consumption mode to the highest power consumption mode;
And in the lowest power consumption mode, when the detected line is electrified and the duration time is longer than a preset fourth time, switching from the lowest power consumption mode to the highest power consumption mode.
Wherein the preset fourth time is a time required for the microcontroller to switch from the lowest power consumption mode to the highest power consumption mode.
It should be noted that, during the preset first time, the preset second time, the preset third time, and the preset fourth time, the microcontroller performs power consumption mode switching, at this time, the microcontroller stops receiving similar power consumption mode switching instructions, and re-receives similar power consumption mode switching instructions after the microcontroller performs power consumption mode switching.
Wherein the microcontroller is switchable to either the medium power consumption mode or the lowest power consumption mode in the highest power consumption mode; the microcontroller can be switched to the highest power consumption mode and cannot be switched to the lowest power consumption mode in the medium power consumption mode; the microcontroller may switch to the highest power consumption mode and may not switch to the medium power consumption mode in the lowest power consumption mode.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. An acquisition device comprising a power source, characterized in that the acquisition device further comprises: the circuit is provided with an electric signal detection circuit, a high-current signal wake-up circuit and a microcontroller, wherein the high-current signal wake-up circuit is respectively connected with the power supply and the microcontroller, and the circuit is provided with the electric signal detection circuit which is respectively connected with the power supply and the microcontroller;
the power supply is used for supplying power to the circuit with an electric signal detection circuit, the high-current signal wake-up circuit and the microcontroller;
The circuit is provided with an electric signal detection circuit which is used for monitoring whether the circuit is electrified and outputting a first level signal to the microcontroller;
The high-current signal wake-up circuit is used for monitoring whether the circuit has high current or not and outputting a second level signal to the microcontroller;
The microcontroller is used for:
When the first level signal is received, determining that the detected line is powered on;
When the second level signal is received, determining that a detected line has large current;
Wherein, when the line is not powered on, the microcontroller maintains a lowest power consumption mode; when the line is powered up and there is no high current, the microcontroller remains in medium power mode; when the line is powered up and a high current exists, the microcontroller maintains a highest power consumption mode;
The circuit has an electrical signal detection circuit including: the system comprises a CT power taking rectifying and protecting circuit, a power down signal detecting circuit, a system power supply converting circuit, a CT power taking input port and a primary battery input port; the CT power-taking rectifying and protecting circuit is connected with the CT power-taking input port, the power-down signal detecting circuit and the system power supply converting circuit; the power-down signal detection circuit is connected with a node between the CT power-taking rectifying and protecting circuit and the system power supply conversion circuit, and is respectively connected with the power supply and the microcontroller; the system power supply conversion circuit is connected with the power supply and the primary battery input port;
The power down signal detection circuit includes: the first resistor R9, the second resistor R10, the third resistor R11, the first capacitor C11 and the NMOS tube Q1; the first end of the first resistor R9 is connected with a node between the CT electricity taking rectifying and protecting circuit and the system power supply converting circuit, and the second end of the first resistor R9 is connected with the first end of the first capacitor C11; the second end of the first capacitor C11 is grounded; a first end of the third resistor R11 is connected to a node between the second end of the first resistor R9 and the first end of the first capacitor C11, and a second end of the third resistor R11 is connected to a node between the second end of the first capacitor C11 and ground; the grid electrode of the NMOS tube Q1 is connected with a node between the second end of the first resistor R9 and the first end of the first capacitor C11, the source electrode of the NMOS tube Q1 is connected with a node between the second end of the first capacitor C11 and the ground, and the drain electrode of the NMOS tube Q1 is connected with the second end of the second resistor R10; the first end of the second resistor R10 is connected with the power supply; an IO second port of the microcontroller is connected with a node between the second resistor R10 and the drain electrode of the NMOS tube Q1; when the circuit is electrified, the voltage output by the CT electricity taking rectifying and protecting circuit is input to the grid electrode and the source electrode of the NMOS tube after being subjected to voltage division filtering by the first resistor R9, the third resistor R11 and the first capacitor C11, and when the VGS voltage of the NMOS tube reaches an opening threshold value, the NMOS tube is conducted, and the first level signal is output to the IO second port of the microcontroller.
2. The acquisition device of claim 1, wherein the high current signal wake-up circuit comprises: the device comprises a rogowski coil signal integration processing circuit, a threshold current detection circuit and a rogowski coil signal input port;
the Rogowski coil signal input port is connected with the Rogowski coil signal integration processing circuit; the rogowski coil signal integration processing circuit is respectively connected with the power supply, the threshold current detection circuit and the microcontroller; the threshold current detection circuit is respectively connected with the power supply and the microcontroller.
3. The acquisition device of claim 2, wherein the threshold current detection circuit comprises: a fourth resistor R5, a fifth resistor R6, a sixth resistor R7, a second capacitor C6, a third capacitor C7, a fourth capacitor C8 and a micro-power consumption comparator U3;
The first end of the fourth resistor R5 is connected with the Rogowski coil signal integration processing circuit, and the second end of the fourth resistor R5 is connected with the first end of the sixth resistor R7; the second end of the sixth resistor R7 is grounded; the first end of the fourth capacitor C8 is connected to a node between the second end of the fourth resistor R5 and the first end of the sixth resistor R7, and the second end of the fourth capacitor C8 is connected to a node between the second end of the sixth resistor R7 and ground; the first end of the second capacitor C6 is connected with the power supply, and the second end of the second capacitor C6 is grounded; a first end of the fifth resistor R6 is connected to a fifth pin of the micro-power consumption comparator U3, and a second end of the fifth resistor R6 is connected to a first end of the third capacitor C7; the second end of the third capacitor C7 is grounded; a first pin of the micro-power consumption comparator U3 is connected with the IO first port of the microcontroller, a second pin of the micro-power consumption comparator U3 is grounded, and a third pin of the micro-power consumption comparator U3 is connected with a node between the first end of the sixth resistor R7 and the first end of the fourth capacitor C8; a fourth pin of the micro-power consumption comparator U3 is connected with a node between the second end of the fifth resistor R6 and the first end of the third capacitor C7, and a sixth pin of the micro-power consumption comparator U3 is connected with a node between the first end of the second capacitor C6 and the power supply;
The fourth resistor R5, the sixth resistor R7 and the fourth capacitor C8 divide and filter the input current signal and output the input current signal to a third pin of the micro-power consumption comparator U3; the internal reference voltage of the micro-power consumption comparator U3 is filtered by the fifth resistor R6 and the third capacitor C7 and then is output to a fourth pin of the micro-power consumption comparator U3, so that the reference voltage reference setting of the micro-power consumption comparator U3 is completed; and when the voltage of the third pin of the micro-power consumption comparator U3 is larger than the voltage of the fourth pin, the first pin outputs the second level signal to the IO first port of the microcontroller.
4. A low power consumption control method applied to the acquisition device of any one of claims 1 to 3, characterized in that the method comprises:
When a first level signal sent by the circuit with electric signal detection circuit is received, determining that the detected circuit is electrified;
when a second level signal sent by the high-current signal wake-up circuit is received, determining that a detected line has high current;
When the line is not powered on, the microcontroller maintains a minimum power consumption mode; when the line is powered up and there is no high current, the microcontroller remains in medium power mode; the microcontroller maintains the highest power consumption mode when the line is powered up and there is a large current.
5. The low power consumption control method of claim 4, wherein the step of the microcontroller switching from the highest power consumption mode to the medium power consumption mode or the lowest power consumption mode comprises:
In the highest power consumption mode, sampling and updating a voltage current value in real time, and switching from the highest power consumption mode to the medium power consumption mode when the current of the line is detected to be smaller than a preset current value and the duration time is longer than a preset first time;
And in the highest power consumption mode, sampling and updating the voltage current value in real time, detecting that the line is in power failure and the duration is longer than a preset second time, and switching from the highest power consumption mode to the lowest power consumption mode.
6. The low power consumption control method of claim 4, wherein the step of the microcontroller switching from the medium power consumption mode to the highest power consumption mode comprises:
in the medium power consumption mode, when the first level signal and/or the second level signal are/is received, switching from the medium power consumption mode to the highest power consumption mode;
and in the medium power consumption mode, the detected line current is sampled at regular intervals to be larger than a preset current value and the duration is larger than a preset third time, or the detected line power failure duration is sampled at regular intervals to be larger than the preset third time, and the medium power consumption mode is switched to the highest power consumption mode.
7. The low power consumption control method of claim 4, wherein the step of the microcontroller switching from the lowest power consumption mode to the highest power consumption mode comprises:
When the second level signal is received in the lowest power consumption mode, switching from the lowest power consumption mode to the highest power consumption mode;
And in the lowest power consumption mode, when the detected line is electrified and the duration time is longer than a preset fourth time, switching from the lowest power consumption mode to the highest power consumption mode.
8. A transient wave recording type fault indicator comprising a collecting device, characterized in that it further comprises an acquisition device according to any one of the claims 1 to 3, said collecting device being connected to said acquisition device.
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