CN113721108A - Acquisition equipment, low-power-consumption control method and transient recording type fault indicator - Google Patents
Acquisition equipment, low-power-consumption control method and transient recording type fault indicator Download PDFInfo
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- 230000001052 transient effect Effects 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000005070 sampling Methods 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 78
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- 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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- 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
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Abstract
The embodiment of the invention provides acquisition equipment, a low-power consumption control method and a transient recording type fault indicator, wherein the acquisition equipment comprises: the circuit comprises a power supply, an electric signal detection circuit, a large-current signal awakening circuit and a microcontroller, wherein the large-current signal awakening circuit is respectively connected with the power supply and the microcontroller, the electric signal detection circuit is arranged on the circuit and used for monitoring whether the circuit is powered on and outputting a first level signal to the microcontroller, the large-current signal awakening circuit is used for monitoring whether the circuit has large current and outputting a second level signal to the microcontroller, the microcontroller enters different power consumption modes to work according to the first level signal and the second level signal, and the problems that fault omission occurs in a traditional technical interval sampling method and the microcontroller cannot normally sample in a sleep mode with lower power consumption are solved.
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 recording type fault indicator.
Background
Transient recording type fault indicator equipment comprises acquisition unit and collection unit, installs on the distribution lines, can monitor each item parameter of circuit operation, detects all kinds of trouble problems, sends the fault detection data to distribution main website. The collecting unit is installed 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 stand-by battery for power supply when the power supply on the circuit is insufficient, and the stand-by battery has limited electric quantity and is unchanged for replacement, so that the service life of the product can be ensured to be longer only by reducing the power consumption of the whole acquisition unit.
There are two ways in the conventional art, one is an interval sampling mode. The acquisition unit enters a sleep mode or a working mode according to a preset sampling time length and a 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 sampling in the working mode, and the purpose of reducing average power consumption is achieved by reasonably configuring the proportion of the sampling time length to the sleep time length. However, when a short-circuit fault occurs on a line, because the fault current suddenly changes rapidly and the duration time is short, if the acquisition unit is in the sleep time, the acquisition unit cannot capture the short-circuit fault current, and the problem of failure and missed judgment can occur.
Another way is a sample threshold wake-up. The high value awakening threshold and the low value awakening threshold of the sampling module are preset, when sudden change of load current occurs on a line, the sampling module can automatically trigger the threshold terminal when detecting that a sampling result is higher than or lower than the preset threshold, and awaken the micro control unit to exit a sleep mode. The microcontroller has to have a threshold wake-up function in a sleep mode, so that the requirement on the type selection 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 a 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 recording type fault indicator, and aims to solve the problems that fault judgment is missed in an interval sampling method and a microcontroller cannot normally sample when entering a low-power-consumption sleep mode in the prior art.
An acquisition device comprising: the circuit comprises a power supply, a circuit electric signal detection circuit, a large-current signal wake-up circuit and a microcontroller, wherein the large-current signal wake-up circuit is respectively connected with the power supply and the microcontroller;
the power supply is used for supplying power to the circuit 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 or not and outputting a first level signal to the microcontroller;
the large-current signal wake-up circuit is used for monitoring whether a large current exists in a circuit and outputting a second level signal to the microcontroller;
the microcontroller is configured to:
when the first level signal is received, determining that the detected line is electrified;
when the second level signal is received, determining that the detected line has large current;
wherein the microcontroller remains in a lowest power consumption mode when the line is not powered; when the line is powered on and there is no large current, the microcontroller remains in a medium power consumption mode; the microcontroller remains in 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 an electric signal detection circuit on a line is received, determining that the detected line is electrified;
when a second level signal sent by the large-current signal wake-up circuit is received, determining that the large current exists in the detected line;
when the line is not powered on, the microcontroller keeps a lowest power consumption mode; when the line is powered on and there is no large current, the microcontroller remains in a medium power consumption mode; the microcontroller remains in the highest power consumption mode when the line is powered up and there is a large current.
A transient logging-type fault indicator comprising a collection device and the collection device as described above, the collection device being connected to the collection device.
According to the acquisition equipment, the low-power-consumption control method and the transient recording type fault indicator, when the microcontroller enters the sleep mode, the line electric signal detection circuit and the large-current signal wake-up circuit are utilized, and the characteristic that the IO interface is interrupted to continue working when the microcontroller enters the deep sleep mode is utilized, so that the line running condition can be continuously monitored when the microcontroller enters the sleep mode, the microcontroller can be woken up to enter different power-consumption working modes according to the signals monitored on the line, the problem that various faults and fault data generated on the line cannot be captured under the conditions that the microcontroller enters the sleep mode and the sampling module is closed in the traditional technology is solved, and the acquisition equipment can run 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 needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a block diagram of an acquisition device in one embodiment of the invention;
FIG. 2 is a block diagram of a transient recording type fault indicator in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of an acquisition device in one embodiment of the invention;
FIG. 4 is a circuit diagram of a wake-up circuit for high current signals according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a circuit with an electrical signal detection circuit according to 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 acquisition device according to the detection result in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment, as shown in fig. 2, a transient recording type fault indicator 100 includes a collection device 1 and a collection device 2, which are connected.
The collecting equipment is arranged on a distribution line, can monitor various fault information and line running condition information on the line, collects and captures various fault characteristic data, and sends the fault information and the fault characteristic data to the collecting equipment;
and the collecting equipment receives the fault information, the fault characteristic data and the line monitoring data information and transmits the line operation condition information, the fault characteristic data, the waveform file and other data information to a power distribution main station.
In one embodiment, as shown in fig. 1, the collecting apparatus comprises: the circuit comprises a power supply 14, a circuit electric signal detection circuit 13, a large-current signal wake-up circuit 12 and a microcontroller 11, wherein the large-current signal wake-up circuit is respectively connected with the power supply and the microcontroller, and the circuit 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 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 or not and outputting a first level signal to the microcontroller;
the large-current signal wake-up circuit is used for monitoring whether a large current exists in a circuit and outputting a second level signal to the microcontroller;
the microcontroller is configured to:
when the first level signal is received, determining that the detected line is electrified;
when the second level signal is received, determining that the detected line has large current;
wherein the microcontroller remains in a lowest power consumption mode when the line is not powered; when the line is powered on and there is no large current, the microcontroller remains in a medium power consumption mode; the microcontroller remains in the highest power consumption mode when the line is powered up and there is a large current.
The microcontroller can switch the lowest power consumption mode, the medium power consumption mode and the highest power consumption mode according to the received first level output by the circuit with the electric signal detection circuit and the received second level output by the large-current signal wake-up circuit, so that the power consumption mode of the microcontroller is reasonably determined, and the acquisition equipment can normally work 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 line electric signal detection circuit is connected with the IO second port;
under the condition of the sleep mode of the microcontroller, the IO port can continue to work without being affected, the second level sent by the large-current signal wake-up circuit can be received by the IO first port of the microcontroller, and at the moment, the microcontroller can be switched from the sleep mode to a normal working mode; and receiving a first level sent by the line electric signal detection circuit by using the IO second port of the microcontroller, and switching the microcontroller from a sleep mode to a normal working mode at the moment.
In one embodiment, as shown in fig. 2, the large current signal wake-up circuit includes: 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 Rogowski coil signal integration processing circuit is connected with an AD port of the microcontroller and provides 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 circuit 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;
a first end of the resistor R2 is connected with a first terminal of the Rogowski coil signal input port, and a second end of the resistor R2 is connected with a 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 operational amplifier U1; a first pin of the micro power operational amplifier U1 is connected with a first end of the resistor R3, a second pin of the micro power operational amplifier U1 is grounded, and a fifth pin of the micro power operational U1 is connected with a first end of the capacitor C3; the capacitor C1 is connected in parallel with the resistor R1, a first end of the capacitor C1 and a first end of the resistor R1 are connected together with a node between a second end of the resistor R2 and a fourth pin of the micro power operational amplifier U1, and a second end of the capacitor C1 and a second end of the resistor R1 are connected together with a node between a first pin of the micro power operational amplifier U1 and a 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 terminal of the capacitor C2 is connected to a node between the second terminal of the resistor R3 and the AD port of the microcontroller, and a second terminal of the capacitor C2 is grounded; the power supply is connected with a node between a fifth pin of the micro power operational amplifier U1 and the first end of the capacitor C3; a first terminal of the capacitor C4 is connected to a node between the second terminal of the rogowski coil signal input port and the first terminal of the resistor R4, and a second terminal of the capacitor C4 is connected to ground; a first end of the capacitor C5 is connected with the power supply, and a second end of the capacitor C5 is connected with a node between a second end of the capacitor C4 and the ground; a first pin of the micro power consumption reference chip U2 is connected to a node between the power supply and a first end of the capacitor C5, a second pin of the micro power consumption reference chip U2 is connected to a node between a second terminal of the Rogowski coil signal input port and a first end of the capacitor C4, and a third pin of the micro power consumption reference chip U2 is connected to a node between a second end of the capacitor C4 and the ground;
in one embodiment, as shown in fig. 4, the threshold current detection circuit includes: the circuit comprises a resistor R5, a resistor R6, a resistor R7, a capacitor C6, a capacitor C7, a capacitor C8 and a micro-power consumption comparator U3;
a first end of the fourth resistor R5 is connected with the Rogowski coil signal integration processing circuit, and a second end of the fourth resistor R5 is connected with a first end of the sixth resistor R7; a second end of the sixth resistor R7 is grounded; a 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 a second end of the fourth capacitor C8 is connected to a node between the second end of the sixth resistor R7 and ground; a first end of the second capacitor C6 is connected with the power supply, and a second end of the second capacitor C6 is grounded; a first end of the fifth resistor R6 is connected with a fifth pin of the micro power consumption comparator U3, and a second end of the fifth resistor R6 is connected with a first end of the third capacitor C7; a second end of the third capacitor C7 is grounded; a first pin of the micro power consumption comparator U3 is connected with an IO (input/output) 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 a first end of the sixth resistor R7 and a first end of the fourth capacitor C8; a fourth pin of the micro power comparator U3 is connected to 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 comparator U3 is connected to 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 a divided voltage filtering processing of an input current signal to a third pin of the micro power consumption comparator U3; the internal reference voltage of the micro power comparator U3 is filtered by the fifth resistor R6 and the third capacitor C7 and then is output to the fourth pin of the micro power comparator U3, so that the reference voltage reference setting of the micro power comparator U3 is completed; and when the third pin voltage of the micro-power consumption comparator U3 is greater than the fourth pin voltage, 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 voltage division filtering processing of an input current signal, and output the processed signal 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 output the processed signal 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, and the IO first port receives the second level signal and can wake up the microcontroller from a sleep mode to enter a normal working mode through an interrupt mode.
In one embodiment, as shown in fig. 3, the circuit for detecting an electrical signal on a line includes: a CT power-taking rectifying and protecting circuit 135, a power-failure signal detecting circuit 131, a system power supply converting circuit 132, a CT power-taking input port 134 and a primary battery input port 133;
the CT power-taking rectification and protection circuit is connected with the CT power-taking input port, the power failure signal detection circuit and the system power supply conversion circuit; the power-down signal detection circuit is connected with a node between the CT power-taking rectification and protection 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: the resistor R9, the resistor R10, the resistor R11, the capacitor C11 and the NMOS transistor Q1;
a first end of the first resistor R9 is connected to a node between the CT power-taking rectification and protection circuit and the system power supply conversion circuit, and a second end of the first resistor R9 is connected to a 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 gate of the NMOS transistor Q1 is connected to the node between the second end of the first resistor R9 and the first end of the first capacitor C11, the source of the NMOS transistor Q1 is connected to the node between the second end of the first capacitor C11 and ground, and the drain of the NMOS transistor Q1 is connected to the second end of the second resistor R10; a 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 transistor Q1;
when the circuit is powered on, the voltage output by the CT power-taking rectification and protection circuit is subjected to voltage division filtering by the first resistor R9, the third resistor R11 and the first capacitor C11 and then input to the grid electrode and the source electrode of the NMOS tube, and when the VGS voltage of the NMOS tube reaches a starting threshold value, the NMOS tube is conducted, and the first level signal is output to the IO first port of the microcontroller.
When the circuit has input current, the voltage of the CT power-taking input port is filtered by the voltage division of the resistor R9, the resistor R11 and the capacitor C11 and then input to the G-S port of the NMOS tube Q1 after passing through the CT power-taking rectification and protection circuit, the NMOS tube Q1 is in a conducting state when the VGS voltage of the NMOS tube Q1 reaches a starting threshold value, and at the moment, a first level is output to the IO second port of the microcontroller to indicate that the circuit is electrified; when the circuit has no input current, the CT power-taking input port has no voltage, the VGS voltage of the NMOS transistor Q1 is 0, and the NMOS transistor Q1 cannot be turned on at this time, and cannot send the first level to the microcontroller.
When receiving the first level, the IO second port of the microcontroller judges that the line is powered at the moment, and is awakened from a sleep mode by an interrupt mode to enter a normal working mode; when the IO second port of the microcontroller does not receive the first level, the IO second port of the microcontroller judges that no current exists in the circuit at the moment, and the IO second port continues to be in the sleep mode again.
In one embodiment, as shown in fig. 5, the system power conversion circuit includes: the power supply comprises a diode D1, a diode D2, a capacitor C9, a capacitor C10 and a power management chip U4;
the anode of the diode D1 is connected to the first terminal of the primary battery input port, and the cathode of the diode D1 is connected to 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 power-taking rectification and protection circuit and the power-down signal detection 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; a first end of the capacitor C9 is connected with the power supply, and a second end of the capacitor C9 is grounded; a first pin of the power management chip U4 is connected to a node between the second end of the capacitor C9 and ground, a 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 a 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 supply voltage.
In an embodiment, as shown in fig. 5, the CT power-taking rectification and protection circuit includes: the diode D3, the diode D4, the diode D5, the diode D6 and the CT input overvoltage clamping module P1;
a first terminal of the CT input overvoltage clamp block P1 is connected to the second terminal of the CT power input port, and a second terminal of the CT input overvoltage clamp block P1 is connected to the first terminal of the CT power input port; the anode of the diode D3 is connected to 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 to a node between the system power supply conversion circuit and the power-down signal detection circuit; the anode of the diode D4 is grounded, and the cathode of the diode D4 is connected to the junction between the first terminal of the CT input overvoltage clamp module P1 and the anode of the diode D3; an anode of the diode D6 is connected to a node between an anode of the diode D4 and ground, and a cathode of the diode D6 is connected to a node between the second terminal of the CT input overvoltage clamp block P1 and the first terminal of the CT power-taking input port; an anode of the diode D5 is connected to a junction between the second terminal of the CT input overvoltage clamp block P1 and the first terminal of the CT power-take input port, and a cathode of the diode D5 is connected to a cathode of the diode D3;
the diode D3, the diode D4, the diode D5 and the diode D6 form an alternating current full wave rectification 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 an electric signal detection circuit on a line is received, determining that the detected line is electrified;
s102, when receiving a second level signal sent by the large-current signal wake-up circuit, determining that the large current exists in the detected line;
s103, controlling the working mode of the acquisition equipment according to the detection result of whether the power is on and the detection result of whether the large current exists;
as shown in fig. 7, the controlling the working mode of the collecting device according to the detection result of whether power is on and the detection result of whether a large current exists includes:
s201, when the circuit is not powered on, the microcontroller keeps a lowest power consumption mode;
s202, when the circuit is powered on and no large current exists, the microcontroller keeps a medium power consumption mode;
s203, when the circuit is powered on and large current exists, the microcontroller keeps the highest power consumption mode.
In one 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:
under the highest power consumption mode, sampling and updating a voltage current value in real time, detecting that the current of the line is smaller than a preset current value and the duration is greater than a preset first time, and switching from the highest power consumption mode to the medium power consumption mode;
and under the highest power consumption mode, sampling and updating the voltage and current values in real time, detecting that the line has power failure and the duration time 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 a time required for the microcontroller to switch from the highest power consumption mode to the medium power consumption mode; the preset second time is a time required for the microcontroller to switch from the highest power consumption mode to the lowest power consumption mode.
In one 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;
in the medium power consumption mode, the line current detected by timing interval sampling is larger than a preset current value, and the duration is larger than a preset third time, or the line power failure duration detected by timing interval sampling is larger than a preset third time, and the medium power consumption mode is switched to the highest power consumption mode.
Wherein the preset third time is a time required for the microcontroller to switch from the medium power consumption mode to the highest power consumption mode.
In one embodiment, the step of the microcontroller switching from the lowest power consumption mode to the highest power consumption mode comprises:
in the lowest power consumption mode, when the second level signal is received, 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 in timing interval sampling, 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.
The microcontroller performs power consumption mode switching during the preset first time, the preset second time, the preset third time and the preset fourth time, and at this time, stops receiving the similar power consumption mode switching instruction, and re-receives the similar power consumption mode switching instruction after the microcontroller performs power consumption mode switching.
Wherein the microcontroller is switchable to 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 can be switched to the highest power consumption mode and can not be switched 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-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An acquisition device comprising a power source, characterized in that the acquisition device further comprises: the circuit comprises an electric signal detection circuit, a large-current signal wake-up circuit and a microcontroller, wherein the large-current signal wake-up circuit is respectively connected with the power supply and the microcontroller, and the 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 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 or not and outputting a first level signal to the microcontroller;
the large-current signal wake-up circuit is used for monitoring whether a large current exists in a circuit and outputting a second level signal to the microcontroller;
the microcontroller is configured to:
when the first level signal is received, determining that the detected line is electrified;
when the second level signal is received, determining that the detected line has large current;
wherein the microcontroller remains in a lowest power consumption mode when the line is not powered; when the line is powered on and there is no large current, the microcontroller remains in a medium power consumption mode; the microcontroller remains in the highest power consumption mode when the line is powered up and there is a large current.
2. The acquisition device as set forth in claim 1, wherein the wired electrical signal detection circuit includes: the power supply system comprises a CT power-taking rectifying and protecting circuit, a power failure 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 rectification and protection circuit is connected with the CT power-taking input port, the power failure signal detection circuit and the system power supply conversion circuit; the power-down signal detection circuit is connected with a node between the CT power-taking rectification and protection 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.
3. The acquisition device of claim 2, wherein the power-down signal detection circuit comprises: the circuit comprises a first resistor R9, a second resistor R10, a third resistor R11, a first capacitor C11 and an NMOS transistor Q1;
a first end of the first resistor R9 is connected to a node between the CT power-taking rectification and protection circuit and the system power supply conversion circuit, and a second end of the first resistor R9 is connected to a 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 gate of the NMOS transistor Q1 is connected to the node between the second end of the first resistor R9 and the first end of the first capacitor C11, the source of the NMOS transistor Q1 is connected to the node between the second end of the first capacitor C11 and ground, and the drain of the NMOS transistor Q1 is connected to the second end of the second resistor R10; a 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 transistor Q1;
when the circuit is powered on, the voltage output by the CT power-taking rectification and protection circuit is subjected to voltage division filtering by the first resistor R9, the third resistor R11 and the first capacitor C11 and then input to the grid electrode and the source electrode of the NMOS tube, and when the VGS voltage of the NMOS tube reaches a starting threshold value, the NMOS tube is conducted, and the first level signal is output to the IO first port of the microcontroller.
4. The acquisition device of claim 1, wherein the high current signal wake-up circuit comprises: the Rogowski coil signal integration processing circuit, the threshold current detection circuit and the 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.
5. The acquisition device of claim 4, 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;
a first end of the fourth resistor R5 is connected with the Rogowski coil signal integration processing circuit, and a second end of the fourth resistor R5 is connected with a first end of the sixth resistor R7; a second end of the sixth resistor R7 is grounded; a 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 a second end of the fourth capacitor C8 is connected to a node between the second end of the sixth resistor R7 and ground; a first end of the second capacitor C6 is connected with the power supply, and a second end of the second capacitor C6 is grounded; a first end of the fifth resistor R6 is connected with a fifth pin of the micro power consumption comparator U3, and a second end of the fifth resistor R6 is connected with a first end of the third capacitor C7; a second end of the third capacitor C7 is grounded; a first pin of the micro power consumption comparator U3 is connected with an IO (input/output) 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 a first end of the sixth resistor R7 and a first end of the fourth capacitor C8; a fourth pin of the micro power comparator U3 is connected to 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 comparator U3 is connected to 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 a divided voltage filtering processing of an input current signal to a third pin of the micro power consumption comparator U3; the internal reference voltage of the micro power comparator U3 is filtered by the fifth resistor R6 and the third capacitor C7 and then is output to the fourth pin of the micro power comparator U3, so that the reference voltage reference setting of the micro power comparator U3 is completed; and when the third pin voltage of the micro-power consumption comparator U3 is greater than the fourth pin voltage, the first pin outputs the second level signal to the IO second port of the microcontroller.
6. A low power consumption control method applied to a microcontroller in the acquisition device according to any one of claims 1 to 5, the method comprising:
when a first level signal sent by an electric signal detection circuit on a line is received, determining that the detected line is electrified;
when a second level signal sent by the large-current signal wake-up circuit is received, determining that the large current exists in the detected line;
when the line is not powered on, the microcontroller keeps a lowest power consumption mode; when the line is powered on and there is no large current, the microcontroller remains in a medium power consumption mode; the microcontroller remains in the highest power consumption mode when the line is powered up and there is a large current.
7. The low power consumption control method of claim 6, 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:
under the highest power consumption mode, sampling and updating a voltage current value in real time, detecting that the current of the line is smaller than a preset current value and the duration is greater than a preset first time, and switching from the highest power consumption mode to the medium power consumption mode;
and under the highest power consumption mode, sampling and updating the voltage and current values in real time, detecting that the line has power failure and the duration time is longer than a preset second time, and switching from the highest power consumption mode to the lowest power consumption mode.
8. The low power consumption control method of claim 6, 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;
in the medium power consumption mode, the line current detected by timing interval sampling is larger than a preset current value, and the duration is larger than a preset third time, or the line power failure duration detected by timing interval sampling is larger than a preset third time, and the medium power consumption mode is switched to the highest power consumption mode.
9. The low power consumption control method of claim 6, wherein the step of the microcontroller switching from the lowest power consumption mode to the highest power consumption mode comprises:
in the lowest power consumption mode, when the second level signal is received, 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 in timing interval sampling, switching from the lowest power consumption mode to the highest power consumption mode.
10. A transient logging type fault indicator comprising a collection device, characterized in that it further comprises an acquisition device according to any one of claims 1 to 5, said collection device being connected to said acquisition device.
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