Measurement switch with fault alarm function

Abstract

The utility model provides a measurement switch with a fault alarm function. The measurement switch comprises a measurement switch body, a detection circuit, an opening judgment circuit, a fault judgment circuit and an early warning module. The detection circuit is used for detecting and measuring an electric signal of the switch body in an opening or closing state and respectively inputting the electric signal to the opening judgment circuit and the fault judgment circuit; the opening judgment circuit is used for detecting and measuring an opening signal of the switch body and inputting the opening signal to the early warning module; the fault judgment circuit is used for detecting and measuring a fault signal of the switch body in an opening state and inputting the fault signal to the early warning module; the early warning module is used for outputting fault information of the measurement switch body according to the received opening signal and the fault signal and sending out an early warning signal; through the measurement switch, the working state of the measurement switch body can be detected, and the fault information of the measurement switch body in the opening state can be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of measurement switches, in particular to a kind of measurement switches with fault alarm function. BACKGROUND

[0002] Measurement switch is a kind of low-voltage electrical equipment used in distribution network, with high-precision current sensor and measurement module, can realize the normal connection, breaking and overload, short-circuit protection of distribution line.

[0003] Although measurement switch has basic data acquisition and measurement capability, there are still some limitations, such as measurement switch can usually only perform basic data acquisition and measurement, cannot meet the demand of comprehensive monitoring and protection in complex environment; In addition, due to the lack of self-diagnosis function and the lack of man-machine interface, etc., which makes the body fault of switch and the state it is in difficult to locate, it is difficult to find in time, also makes the operation become complex, maintenance work becomes difficult.

[0004] Therefore, in order to solve the above technical problems, it is urgent to put forward a new technical means. UTILITY MODEL CONTENT

[0005] Therefore, in order to solve the above technical problems, it is urgent to put forward a new technical means.

[0006] The utility model provides a kind of measurement switches with fault alarm function, including: measurement switch body, detection circuit, split gate judging circuit, fault judging circuit and early warning module;

[0007] The detection circuit is used to detect the electric signal of the split gate or the closing state of the measurement switch body and input the electric signal into the split gate judging circuit and the fault judging circuit respectively;

[0008] The split gate judging circuit is used to detect the split gate signal of the measurement switch body and input the split gate signal into the early warning module;

[0009] The fault judging circuit is used to detect the fault signal of the split gate state of the measurement switch body and input the fault signal into the early warning module;

[0010] The early warning module is used to output the fault information of the measurement switch body and send early warning signal according to the received split gate signal and fault signal.

[0011] Further, the detection circuit includes resistance R1, pressure resistance RV1, rectifier bridge D1, diode D2 and capacitor C1;

[0012] One end of the resistor R1 is connected to the input end of the detection circuit, the other end of the resistor R1 is connected to the positive input end of the rectifier bridge D1, one end of the voltage-dependent resistor RV1 is connected to the positive input end of the rectifier bridge D1, the other end of the voltage-dependent resistor RV1 is grounded, the negative input end of the rectifier bridge D1 is grounded, the positive output end of the rectifier bridge D1 is connected to the anode of the diode D2 and one end of the capacitor C1 respectively, the negative output end of the rectifier bridge D1 is grounded, the negative electrode of the diode D2 and the other end of the capacitor C1 are grounded, the positive output end of the rectifier bridge D1 is connected to the input end of the tripping judgment circuit and the fault judgment circuit respectively as the output end of the detection circuit.

[0013] Further, the tripping judgment circuit comprises a resistor R2, a resistor R3, a resistor R4, a resistor R5, a photo-coupler OP1 and a triode Q1.

[0014] The anode of the light-emitting diode of the photo-coupler OP1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the positive output end of the rectifier bridge D1 as the input end of the tripping judgment circuit, the cathode of the light-emitting diode of the photo-coupler OP1 is grounded, the collector of the photo-sensitive triode of the photo-coupler OP1 is connected to +5V power supply and one end of the resistor R3 respectively, the emitter of the photo-sensitive triode of the photo-coupler OP1 is grounded through the resistor R4 and the resistor R5 in series, the other end of the resistor R3 is connected to the collector of the triode Q1, the collector of the triode Q1 is connected to the common connection point of the resistor R3 as the output end of the tripping judgment circuit, the base of the triode Q1 is connected to the common connection point of the resistors R4 and R5, the emitter of the triode Q1 is grounded.

[0015] Further, the fault judgment circuit comprises a comparator U1, an adjustable resistor R6, a resistor R7 and a capacitor C2.

[0016] The same direction input end of the comparator U1 is connected to the positive output end of the rectifier bridge D1 as the input end of the fault judgment circuit, the reverse direction input end of the comparator U1 is connected to the adjusting end of the adjustable resistor R6, one end of the adjustable resistor R6 is connected to +5V power supply, the other end of the adjustable resistor R6 is grounded, the negative power supply end of the comparator U1 is grounded, the positive power supply end of the comparator U1 is connected to one end of the capacitor C2 and +5V power supply respectively, the other end of the capacitor C2 is grounded, one end of the resistor R7 is connected to the common connection point of the capacitor C2 and the positive power supply end of the comparator U1, the other end of the resistor R7 is connected to the output end of the comparator U1, the output end of the comparator U1 is connected to the input end of the pre-warning module as the output end of the fault judgment circuit.

[0017] Further, the pre-warning module comprises a processor and an audible and visual alarm.

[0018] The processor is configured to output fault information of the measuring switch body according to the received opening signal and fault signal, and send an alarm instruction to the sound-light alarm;

[0019] The sound-light alarm is configured to receive the alarm instruction sent by the processor and send an alarm.

[0020] Further, the pre-warning module further comprises an environment acquisition module, a touch display module, a driving module and a communication module.

[0021] The environment acquisition module is configured to acquire environment information of the working of the measuring switch body and input the environment information to the pre-warning module.

[0022] The touch display module is configured to display the environment information and the fault information output by the pre-warning module, and send an instruction to the pre-warning module.

[0023] The driving module is configured to receive the instruction of the pre-warning module and drive the measuring switch body to act.

[0024] The communication module is configured to connect the pre-warning module and an edge gateway.

[0025] Further, the environment acquisition module at least comprises a temperature and humidity sensor and a smoke sensor.

[0026] Further, the pre-warning module further comprises a storage module, a time-providing module and a positioning module.

[0027] The storage module, the time-providing module and the positioning module are all in communication connection with the processor.

[0028] The utility model discloses the beneficial effects: the utility model discloses through detection circuit, obtains the electric signal when the measuring switch body opens or closes, and the electric signal that obtains exports to the opening judgment circuit and fault judgment circuit, can judge whether the measuring switch is currently in the open state through the opening judgment circuit, when the measuring switch body is in the open state, can further combine the fault judgment circuit to judge whether the measuring switch body has the fault such as virtual connection, contact failure, provides the basis for the power safety. BRIEF DESCRIPTION OF DRAWINGS

[0029] The utility model will be further described below in connection with the drawings and examples:

[0030] Figure 1 It is the whole structure schematic diagram of the utility model.

[0031] Figure 2 It is the circuit principle diagram of the utility model.

[0032] Figure 3 It is the deployment mode schematic diagram of the utility model. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings:

[0034] This utility model proposes a measuring switch with fault alarm function, comprising: a measuring switch body, a detection circuit, a tripping judgment circuit, a fault judgment circuit, and an early warning module, such as... Figure 1 As shown;

[0035] The detection circuit is used to detect the electrical signal of the switch body in the open or closed state and input the electrical signal to the open judgment circuit and the fault judgment circuit respectively.

[0036] The tripping judgment circuit is used to detect the tripping signal of the measuring switch body and input the tripping signal to the early warning module;

[0037] The fault judgment circuit is used to detect fault signals in the open state of the measuring switch body and input the fault signals to the early warning module;

[0038] The early warning module is used to output fault information of the measuring switch body and issue an early warning signal based on the received tripping signal and fault signal. Through the aforementioned measuring switch, the working status of the measuring switch body and the fault information during tripping can be detected in real time, thereby ensuring the stability and safety of the power system.

[0039] In this embodiment, the detection circuit includes a resistor R1, a varistor RV1, a rectifier bridge D1, a diode D2, and a capacitor C1, as follows: Figure 2 As shown;

[0040] One end of resistor R1 serves as the input terminal of the detection circuit and is connected to the energized circuit of the measuring switch. The other end of resistor R1 is connected to the positive input terminal of rectifier bridge D1. The rectifier bridge is composed of multiple diodes, which is existing technology and will not be described in detail here. One end of varistor RV1 is connected to the positive input terminal of rectifier bridge D1, and the other end of varistor RV1 is grounded. The negative input terminal of rectifier bridge D1 is grounded. The positive output terminal of rectifier bridge D1 is connected to the positive terminal of diode D2 and one end of capacitor C1, respectively. The negative output terminal of rectifier bridge D1 is grounded. The negative terminal of diode D2 and the other end of capacitor C1 are both grounded. The positive output terminal of rectifier bridge D1 serves as the output terminal of the detection circuit and is connected to the input terminals of the tripping judgment circuit and the fault judgment circuit, respectively.

[0041] Because a loose connection may occur when the measuring switch body is opened, an electrical signal may also be present when the measuring switch body is opened.

[0042] The structure can rectify and filter the voltage signal output by the measuring switch body, convert the alternating voltage signal output by the measuring switch body into a direct current voltage signal, and provide subsequent tripping judgment and fault judgment.

[0043] In the embodiment, the tripping judgment circuit includes resistors R2, R3, R4, R5, an optical coupler OP1, and a transistor Q1, as shown in the figure. Figure 2

[0044] The anode of the light emitting diode of the optical coupler OP1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the positive output end of the rectifier bridge D1 as the input end of the tripping judgment circuit, the cathode of the light emitting diode of the optical coupler OP1 is grounded, the collector of the photosensitive transistor of the optical coupler OP1 is connected to a +5V power supply and one end of the resistor R3, respectively, the emitter of the photosensitive transistor of the optical coupler OP1 is grounded through the resistors R4 and R5 in series, the other end of the resistor R3 is connected to the collector of the transistor Q1, the collector of the transistor Q1 is connected to the common connection point of the resistor R3 as the output end of the tripping judgment circuit, the input end of the early warning module, the base of the transistor Q1 is connected to the common connection point of the resistors R4 and R5, and the emitter of the transistor Q1 is grounded.

[0045] In the case of closing the measuring switch body, the voltage signal output by the detection circuit drives the optical coupler OP1 to work, and then the transistor Q1 is in a conducting state, at this time, the tripping judgment circuit outputs a low-level signal to the first detection input end of the early warning module, that is, in the case of closing the measuring switch body, the tripping judgment circuit outputs a low-level signal.

[0046] In the case of normally opening the measuring switch body, the output end of the measuring switch body has no electric signal output, the detection circuit has no electric signal output, the optical coupler OP1 has no electric signal output, and the transistor Q1 is in a cut-off state, at this time, the tripping judgment circuit outputs a high-level signal to the input end of the early warning module, that is, in the case of normally opening the measuring switch body, the tripping judgment circuit outputs a high-level signal.

[0047] In the case of opening the measuring switch body but with an opening fault, such as incomplete opening or virtual connection, the output end of the measuring switch body outputs a weak voltage signal, but the weak voltage signal is not enough to drive the optical coupler OP1 to work, and the transistor Q1 is in a cut-off state, at this time, the tripping judgment circuit still outputs a high-level signal, that is, in the case of opening fault of the measuring switch body, the tripping judgment circuit outputs a high-level signal; through the above structure, whether the measuring switch body is in an open state can be accurately judged.

[0048] ​In this embodiment, the fault judgment circuit comprises a comparator U1, an adjustable resistor R6, a resistor R7 and a capacitor C2, as shown in Figure 2

[0049] The same direction input end of the comparator U1 is connected to the positive output end of the rectifier bridge D1 as the input end of the fault judgment circuit, the reverse input end of the comparator U1 is connected with the adjusting end of the adjustable resistor R6, one end of the adjustable resistor R6 is connected with the +5V power supply, the other end of the adjustable resistor R6 is grounded, the negative power supply end of the comparator U1 is grounded, the positive power supply end of the comparator U1 is connected with one end of the capacitor C2 and the +5V power supply respectively, the other end of the capacitor C2 is grounded, one end of the resistor R7 is connected to the common connection point of the capacitor C2 and the positive power supply end of the comparator U1, the other end of the resistor R7 is connected to the output end of the comparator U1, and the output end of the comparator U1 is connected to the input end of the early warning module as the output end of the fault judgment circuit.

[0050] In the case of closing the measuring switch body, the application does not perform fault detection and judgment, and only in the case of opening the measuring switch body, the fault judgment is performed.

[0051] In the case of opening fault of the measuring switch body, the detection circuit inputs a voltage signal to the positive input end of the comparator U1, and further divides the voltage of the +5V power supply through the adjustable resistor R5, so that the voltage signal input to the positive input end is greater than the voltage signal input to the reverse input end. At this time, the fault judgment circuit outputs a high level signal to the input end of the early warning module.

[0052] In the case of normal opening of the measuring switch body, the voltage signal input to the reverse input end is greater than the voltage signal input to the positive input end, and the fault judgment circuit outputs a low level signal.

[0053] Since the fault judgment circuit also outputs a high level signal in the state of closing the measuring switch body, which is the same as the signal output in the case of opening fault of the measuring switch body, the fault detection of the application is combined with the working state of the measuring switch body to judge. If the measuring switch body is in the closing state, even if the fault judgment circuit outputs a high level signal, no fault detection is performed. When the measuring switch body is in the opening state, that is, the opening judgment circuit outputs a low level signal, the signal output by the fault judgment circuit is further used to judge the fault of the measuring switch body. If the fault judgment circuit outputs a low level signal, it indicates that the measuring switch body is normally opened and has no fault. If the fault judgment circuit outputs a high level signal, it indicates that there is a fault in the opening of the measuring switch body. Through the above structure, the fault in the opening state of the measuring switch body can be accurately identified.

[0054] ​The early warning module comprises a processor and an audible and visual alarm in the embodiment.

[0055] The processor is configured to output fault information of the measuring switch body according to the received tripping signal and fault signal, and send an alarm instruction to the audible and visual alarm; the processor is preferably a 32-bit high-performance CPU.

[0056] The audible and visual alarm is configured to receive the alarm instruction sent by the processor and send an alarm.

[0057] Through the above arrangement, the staff can be reminded in time when the measuring switch has a fault, so as to avoid accidents.

[0058] The early warning system further comprises an environment acquisition module, a touch display module, a driving module and a communication module.

[0059] The environment acquisition module is configured to acquire environmental information of the measuring switch body and input the environmental information to the early warning module (processor).

[0060] The touch display module is configured to display the environmental information and fault information output by the early warning module (processor), and send an instruction to the early warning module (processor).

[0061] The touch display module can display the information acquired by the environment acquisition module, the working state and fault information of the measuring switch body, send an instruction to the early warning module (processor), and perform a reset operation or parameter setting, etc., such as controlling the measuring switch body to trip or close, after the aforementioned instruction is input, the early warning module (processor) further controls the driving module to work, so as to realize the tripping or closing of the measuring switch body.

[0062] The driving module is configured to receive the instruction of the early warning module (processor) and drive the measuring switch body to act, the driving module adopts an existing measuring switch driving device, in the application, the driving circuit is used to drive the trip to work, and then the measuring switch body is driven to act, the driving circuit adopts the existing technology, and details are not described herein.

[0063] The communication module is configured to connect the early warning module (processor) and an edge gateway, the edge gateway transmits monitoring information to a monitoring master station; the communication module can be a wired communication module or a wireless communication module, which is not limited herein; if it is a wired communication module, a low-voltage power line high-speed carrier communication HPLC is preferably adopted, and if it is a wireless communication module, a 5G communication module is preferably adopted.

[0064] Further, a basic electric signal acquisition module can be further arranged to acquire basic working signals of the measuring switch body, such as current and voltage, to realize monitoring of the measuring switch body in a closed state, and the processor can control the audible and visual alarm to issue an alarm when the basic working signals exceed a normal threshold.

[0065] Through the above arrangement, the monitoring capability of the measuring switch on the surrounding environment is significantly enhanced, and a basis is provided for the measuring switch to more accurately respond to external changes.

[0066] In the embodiment, the environment acquisition module at least includes a temperature and humidity sensor and a smoke sensor, and can further include a pressure sensor; the temperature and humidity sensor, the smoke sensor and the pressure sensor adopt existing sensors, and details are not repeated here.

[0067] The environment acquisition module is used to monitor the working environment of the measuring switch body, and the warning module can control the audible and visual alarm to issue an alarm when the environment is not suitable for the working of the measuring switch through the foregoing data.

[0068] The fault detection module is composed of the detection circuit, the opening judgment circuit and the fault judgment circuit; preferably, each module in the application is modularly arranged, can be flexibly connected with the measuring switch body, and can be independently replaced and upgraded, and further can rapidly process faults of each module and improve the maintainability and expandability of the whole.

[0069] Further, the application does not limit the connection relationship between each module and the warning module, and preferably, the temperature and humidity sensor is connected with the warning module through an I2C bus, and the smoke sensor and the touch display module are connected with the warning module through a UART bus.

[0070] In the embodiment, the storage module, the time service module and the positioning module are further included.

[0071] The storage module, the time service module and the positioning module are in communication connection with the processor; the storage module is used to store data transmitted by the processor, including fault information and environment information, etc.

[0072] The positioning module is used to represent the position information of the current measuring switch, and can adopt a GPS positioning module or a Beidou positioning module, and the time service module adopts an existing GPS time service circuit to ensure the synchronism of the whole system and further provide accurate clock information for the control of the processor.

[0073] The installation and deployment of the application are as shown in Figure 3 The measuring switch of the application can be arranged in a meter box, so that the conventional meter box is provided with multiple monitoring functions, and the safety of electricity use is improved.

[0074] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A measuring switch with fault alarm function, characterized in that: include: Measurement switch body, detection circuit, tripping judgment circuit, fault judgment circuit and early warning module; The detection circuit is used to detect the electrical signal of the switch body in the open or closed state and input the electrical signal to the open judgment circuit and the fault judgment circuit respectively. The tripping judgment circuit is used to detect the tripping signal of the measuring switch body and input the tripping signal to the early warning module; The fault judgment circuit is used to detect fault signals in the open state of the measuring switch body and input the fault signals to the early warning module; The early warning module is used to output fault information of the measuring switch body and issue an early warning signal based on the received trip signal and fault signal.

2. The measuring switch with fault alarm function according to claim 1, characterized in that: The detection circuit includes a resistor R1, a varistor RV1, a rectifier bridge D1, a diode D2, and a capacitor C1; One end of resistor R1 serves as the input terminal of the detection circuit, and the other end of resistor R1 is connected to the positive input terminal of rectifier bridge D1. One end of varistor RV1 is connected to the positive input terminal of rectifier bridge D1, and the other end of varistor RV1 is grounded. The negative input terminal of rectifier bridge D1 is grounded. The positive output terminal of rectifier bridge D1 is connected to the positive terminal of diode D2 and one end of capacitor C1, respectively. The negative output terminal of rectifier bridge D1 is grounded. The negative terminal of diode D2 and the other end of capacitor C1 are both grounded. The positive output terminal of rectifier bridge D1 serves as the output terminal of the detection circuit and is connected to the input terminals of the tripping judgment circuit and the fault judgment circuit, respectively.

3. The measuring switch with fault alarm function according to claim 2, characterized in that: The circuit for determining the tripping of the circuit includes resistors R2, R3, R4, and R5, optocoupler OP1, and transistor Q1. The positive terminal of the LED of the optocoupler OP1 is connected to one end of the resistor R2. The other end of the resistor R2 serves as the input terminal of the tripping judgment circuit and is connected to the positive output terminal of the rectifier bridge D1. The negative terminal of the LED of the optocoupler OP1 is grounded. The collector of the phototransistor of the optocoupler OP1 is connected to the +5V power supply and one end of the resistor R3. The emitter of the phototransistor of the optocoupler OP1 is grounded through the series resistors R4 and R5. The other end of the resistor R3 is connected to the collector of the transistor Q1. The common connection point of the collector of the transistor Q1 and the resistor R3 serves as the output terminal of the tripping judgment circuit and is connected to the input terminal of the warning module. The base of the transistor Q1 is connected to the common connection point of the resistors R4 and R5. The emitter of the transistor Q1 is grounded.

4. The measuring switch with fault alarm function according to any one of claims 2 or 3, characterized in that: The fault diagnosis circuit includes a comparator U1, an adjustable resistor R6, a resistor R7, and a capacitor C2. The non-inverting input of comparator U1 is connected to the positive output of rectifier bridge D1 as the input of the fault judgment circuit. The inverting input of comparator U1 is connected to the adjustment terminal of adjustable resistor R6. One end of adjustable resistor R6 is connected to +5V power supply, and the other end of adjustable resistor R6 is grounded. The negative power supply terminal of comparator U1 is grounded. The positive power supply terminal of comparator U1 is connected to one end of capacitor C2 and the +5V power supply. The other end of capacitor C2 is grounded. One end of resistor R7 is connected to the common connection point of capacitor C2 and the positive power supply terminal of comparator U1. The other end of resistor R7 is connected to the output of comparator U1. The output of comparator U1 is connected to the input of the early warning module as the output of the fault judgment circuit.

5. The measuring switch with fault alarm function according to claim 1, characterized in that: The early warning module includes a processor and an audible and visual alarm; The processor is used to output fault information of the measuring switch body according to the received trip signal and fault signal, and to send an alarm command to the audible and visual alarm. The audible and visual alarm is used to receive alarm commands from the processor and issue an alarm.

6. The measuring switch with fault alarm function according to claim 1 or claim 5, characterized in that: It also includes an environmental acquisition module, a touch display module, a driver module, and a communication module; The environmental acquisition module is used to collect environmental information about the operation of the measuring switch body and input the environmental information into the early warning module; The touch display module is used to display environmental and fault information output by the warning module, and to issue commands to the warning module; The drive module is used to receive instructions from the early warning module and drive the measurement switch body to move. The communication module is used to connect the early warning module and the edge gateway.

7. The measuring switch with fault alarm function according to claim 6, characterized in that: The environmental acquisition module includes at least a temperature and humidity sensor and a smoke sensor.

8. The measuring switch with fault alarm function according to claim 5, characterized in that: It also includes a storage module, a timing module, and a positioning module; The storage module, timing module, and positioning module are all communicatively connected to the processor.

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