CN216310240U - Feeder line detection module and detection circuit - Google Patents
Feeder line detection module and detection circuit Download PDFInfo
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- CN216310240U CN216310240U CN202122410099.0U CN202122410099U CN216310240U CN 216310240 U CN216310240 U CN 216310240U CN 202122410099 U CN202122410099 U CN 202122410099U CN 216310240 U CN216310240 U CN 216310240U
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Abstract
The utility model discloses a feeder line detection module and a detection circuit, and relates to the technical field of circuits; the intelligent control circuit comprises a switch state acquisition circuit, a current acquisition circuit, a master control circuit, a communication circuit, a switch state acquisition digital circuit and a current acquisition digital circuit; the switch state acquisition circuit is connected with the circuit breakers in the plurality of feeder lines; the collecting end of the current collecting circuit is connected with the plurality of annular magnetic cores; the main control circuit is electrically connected with the switch state acquisition circuit and the current acquisition circuit; the communication circuit is electrically connected with the main control circuit and is used for receiving the digital signal processed by the main control circuit and transmitting the digital signal to an upper computer; the switch state acquisition digital circuit is electrically connected between the circuit breaker and the switch state acquisition circuit in the feeder line; the current acquisition digital circuit is electrically connected between the annular magnetic core and the current acquisition circuit. The switch state acquisition circuit is added, the structure of the direct-current power supply is simplified, and multi-path signal inspection can be carried out.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to a feeder line detection module and a feeder line detection circuit.
Background
In the existing direct current power supply system, a leakage current sensor and a switching value detection unit are generally adopted to detect the insulation condition and the switch on-off condition of a feeder line, the leakage current sensor detects the magnitude of a difference current between positive and negative in a circuit, and the insulation information of the feeder line is fed back to an upper computer through the insulation detection unit to be displayed; and the switching value detection unit collects the alarm and trip signals of the feeder switch and uploads the signals to the upper computer for display.
When the number of the feeder lines in the direct-current power supply system is large, the working power supplies of the leakage current sensors of each feeder line branch circuit need to be connected in parallel, the consumed currents of the sensors are superposed, and the overall power consumption is high; each leakage current sensor is connected with the detection unit, and the number of required wire harnesses is large; and the power supply is repeatedly configured, when one of the power supply is damaged, other damage is easily caused; the traditional leakage current sensor is easily interfered by temperature, geomagnetic field and the like, so that the phenomenon of large zero offset is easily caused, and false alarm is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a feeder line detection module and a detection circuit capable of detecting a plurality of feeder lines.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a feeder line detection circuit comprises a switch state acquisition circuit, a current acquisition circuit, a main control circuit, a communication circuit, a switch state acquisition digital circuit and a current acquisition digital circuit;
the switch state acquisition circuit is connected with the circuit breakers in the feeder lines and is used for acquiring switching value signals of the feeder lines;
the current acquisition circuit is characterized in that the acquisition end of the current acquisition circuit is connected with a plurality of annular magnetic cores, and an input pulse width signal and a passive sensor form an oscillating magnetic field for acquiring leakage current signals of each feeder line;
the main control circuit is electrically connected with the switching state acquisition circuit and the current acquisition circuit and is used for receiving a leakage current signal and a switching value signal of the feeder line and converting the leakage current signal and the switching value signal into digital signals;
the communication circuit is electrically connected with the main control circuit and is used for receiving the digital signal processed by the main control circuit and transmitting the digital signal to an upper computer;
the switch state acquisition digital circuit is electrically connected between the circuit breaker and the switch state acquisition circuit in the feeder line, and gates a required feeder line switching value signal detection channel according to the requirement of the main control circuit;
the current acquisition digital circuit is electrically connected between the annular magnetic core and the current acquisition circuit, and gates a required feeder line leakage current signal detection channel according to the requirement of the main control circuit.
The technical scheme also comprises a power supply voltage stabilizing circuit which is respectively and electrically connected to the off-state acquisition circuit, the current acquisition circuit, the main control circuit, the communication circuit, the on-off state acquisition digital circuit and the current acquisition digital circuit.
The technical scheme also comprises a current correction circuit for self-calibration of current measurement of the feeder line detection circuit.
The utility model also provides a feeder line detection module, which comprises a passive sensor, a bus bar, a fixing bar and a detection box;
the plurality of passive sensors are connected with the detection box and fixed above the fixing strip, and the bus board is fixed below the fixing strip and connected with the passive sensors and the detection box;
the feeder line detection circuit is as described in any one of the above in the detection box.
In the technical scheme, the fixing strip is made of iron.
The utility model has the beneficial effects that: the current acquisition circuit and the switch state acquisition circuit are simultaneously connected with a plurality of feeders, a required feeder leakage current signal detection channel is gated through a digital circuit, multi-path signal inspection can be carried out, and signals are converted into digital signals to be transmitted to an upper computer; the whole module is integrated, the CPU controls the module, the sensor adopts a passive sensor, the sensor is not damaged, the sensor is not required to be disassembled when a fault occurs, and the fault caused by power supply short circuit and resistor capacitor burning of the traditional product is avoided; a switch acquisition interface is added, and feeder switch information and insulation information are uploaded to an upper computer together, so that the structure of the direct-current power supply is simplified; the automatic calibration function is reserved in the device, and the functions of automatically completing zero point calibration and amplitude value calibration can be completed.
Drawings
Fig. 1 is a schematic block diagram of a feeder detection circuit according to the present invention.
Fig. 2 is a diagram of an embodiment of a switch state acquisition circuit in a feeder line detection circuit according to the present invention.
Fig. 3 is a diagram of an embodiment of a current collection circuit in a feeder line detection circuit according to the present invention.
Fig. 4 is a diagram of an embodiment of a main control circuit in a feeder line detection circuit according to the present invention.
Fig. 5 is a diagram of an embodiment of a communication circuit in a feeder line detection circuit according to the present invention.
Fig. 6 is a diagram of an embodiment of a power supply regulated current in a feeder line detection circuit according to the present invention.
Fig. 7 is a diagram of an embodiment of a current correction circuit in a feeder line detection circuit according to the present invention.
Fig. 8 is a diagram of an embodiment of a current acquisition digital circuit portion in a feeder line detection circuit according to the present invention.
Fig. 9 is a schematic structural diagram of a feeder line detection module according to the present invention.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the utility model can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1, the present invention provides a feeder line detection circuit, which adds a switch acquisition interface on the basis of a current acquisition interface, simplifies the structure of a dc power supply, and simultaneously connects a plurality of feeder lines, and also adds a digital module, gates a required detection channel according to the instruction of a main control circuit, and also avoids the faults of the conventional product caused by power supply short circuit and capacitor resistance burnout by adopting a passive sensor. Specifically, the circuit comprises a switch state acquisition circuit 1, a current acquisition circuit 2, a main control circuit 3, a communication circuit 4, a switch state acquisition digital circuit 7, a current acquisition digital circuit 6 and a power supply voltage stabilizing circuit 5, wherein the power supply voltage stabilizing circuit 5 is respectively and electrically connected to the switch state acquisition circuit 1, the current acquisition circuit 2, the main control circuit 3, the communication circuit 4, the switch state acquisition digital circuit 7 and the current acquisition digital circuit 6, and further comprises a current correction circuit for self-calibration of current measurement of the feeder line detection circuit; the switch state acquisition circuit 1 is connected with the circuit breakers in the feeder lines and is used for acquiring switching value signals of each feeder line and carrying out multi-path signal inspection; the acquisition end of the current acquisition circuit 2 is connected with a plurality of annular magnetic cores, and an input pulse width signal and a passive sensor form an oscillating magnetic field for acquiring leakage current signals of each feeder line; the main control circuit 3 is electrically connected with the switching state acquisition circuit 1 and the current acquisition circuit 2 and is used for receiving a leakage current signal and a switching value signal of the feeder line and converting the leakage current signal and the switching value signal into digital signals; the communication circuit 4 is electrically connected with the main control circuit 3 and is used for receiving the digital signals processed by the main control circuit 3 and transmitting the digital signals to the upper computer 8; the switch state acquisition digital circuit 7 is electrically connected between the circuit breaker in the feeder line and the switch state acquisition circuit 1, and gates a required feeder line switching value signal detection channel according to the requirement of the main control circuit 3; the current acquisition digital circuit 6 is electrically connected between the annular magnetic core and the current acquisition circuit, a required feeder line leakage current signal detection channel is gated according to the requirement of the main control circuit 3, the whole module is integrated, the CPU controls, the RS485 digital port is communicated with an upper computer, an address is set through the dial switch, and a plurality of modules can be connected in parallel for use.
For the switch state acquisition circuit 1, as shown in fig. 2, the present invention provides a specific embodiment. For the current acquisition circuit 2, as shown in fig. 3, the present invention provides a specific embodiment. For the main control circuit 3, as shown in fig. 4, the present invention provides a specific embodiment. For the communication circuit 4, as shown in fig. 5, the present invention provides an embodiment. As shown in FIG. 6, the present invention provides an embodiment of the power supply voltage stabilizing circuit 5. For the current correction circuit, as shown in fig. 7, the present invention provides a specific embodiment. For the current acquisition digital circuit 6, a specific embodiment is provided by the present invention, as shown in fig. 8. The circuit structure in the above embodiments refers to the drawings, and the specific circuit structure in this embodiment will not be described in detail.
Through the circuit structure, the passive sensor is adopted to replace the traditional sensor, the faults of the traditional product caused by power supply short circuit and resistor-capacitor burning are avoided, the switch state acquisition circuit 1 is added while the leakage current detection is carried out, the acquired information is converted and transmitted to the upper computer 8, the structure of the direct current power supply is simplified, a plurality of feeders can be connected simultaneously, and multi-path signal inspection can be carried out according to the matching of the digital circuit and the main control circuit 3.
Referring to fig. 8, the utility model further provides a feeder line detection module, which includes a passive sensor 12, a bus bar 10, a fixing bar 9 and a detection box 11, wherein the fixing bar 9 is made of iron; the 12 passive sensors 12 are connected with the detection box 11 and are fixed above the fixing strip 9, and the bus board 10 is fixed below the fixing strip 9 and is connected with the passive sensors 12 and the detection box 11; the detection box 11 is internally provided with the feeder line detection circuit.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. A feed line detection circuit, characterized by: the intelligent control circuit comprises a switch state acquisition circuit, a current acquisition circuit, a master control circuit, a communication circuit, a switch state acquisition digital circuit and a current acquisition digital circuit;
the switch state acquisition circuit is connected with the circuit breakers in the feeder lines and is used for acquiring switching value signals of the feeder lines;
the current acquisition circuit is characterized in that the acquisition end of the current acquisition circuit is connected with a plurality of annular magnetic cores, and an input pulse width signal and a passive sensor form an oscillating magnetic field for acquiring leakage current signals of each feeder line;
the main control circuit is electrically connected with the switching state acquisition circuit and the current acquisition circuit and is used for receiving a leakage current signal and a switching value signal of the feeder line and converting the leakage current signal and the switching value signal into digital signals;
the communication circuit is electrically connected with the main control circuit and is used for receiving the digital signal processed by the main control circuit and transmitting the digital signal to an upper computer;
the switch state acquisition digital circuit is electrically connected between the circuit breaker and the switch state acquisition circuit in the feeder line, and gates a required feeder line switching value signal detection channel according to the requirement of the main control circuit;
the current acquisition digital circuit is electrically connected between the annular magnetic core and the current acquisition circuit, and gates a required feeder line leakage current signal detection channel according to the requirement of the main control circuit.
2. A feed line detection circuit as claimed in claim 1 wherein: the power supply voltage stabilizing circuit is electrically connected to the switch state acquisition circuit, the current acquisition circuit, the main control circuit, the communication circuit, the switch state acquisition digital circuit and the current acquisition digital circuit respectively.
3. A feed line detection circuit as claimed in claim 1 wherein: the current correction circuit is used for self-calibration of current measurement of the feeder line detection circuit.
4. A feeder detection module, characterized by: the device comprises a passive sensor, a bus bar, a fixing bar and a detection box;
the plurality of passive sensors are connected with the detection box and fixed above the fixing strip, and the bus board is fixed below the fixing strip and connected with the passive sensors and the detection box;
a feed line detection circuit as claimed in any one of claims 1 to 3 in the detection box.
5. The feeder detection module of claim 4, wherein: the fixing strip is made of iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410099.0U CN216310240U (en) | 2021-09-30 | 2021-09-30 | Feeder line detection module and detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410099.0U CN216310240U (en) | 2021-09-30 | 2021-09-30 | Feeder line detection module and detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216310240U true CN216310240U (en) | 2022-04-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122410099.0U Active CN216310240U (en) | 2021-09-30 | 2021-09-30 | Feeder line detection module and detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216310240U (en) |
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2021
- 2021-09-30 CN CN202122410099.0U patent/CN216310240U/en active Active
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