CN211014515U - Cable core alignment detection device - Google Patents
Cable core alignment detection device Download PDFInfo
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- CN211014515U CN211014515U CN201921961361.7U CN201921961361U CN211014515U CN 211014515 U CN211014515 U CN 211014515U CN 201921961361 U CN201921961361 U CN 201921961361U CN 211014515 U CN211014515 U CN 211014515U
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Abstract
The utility model discloses a cable core alignment detection device, which comprises a voltage detection module, an A/D converter, a main controller, an alarm module and a power circuit; the voltage detection module is used for externally connecting a cable to be detected; the output end of the voltage detection module is electrically connected with the input end of the A/D converter; the output end of the A/D converter is electrically connected with the input end of the main controller; the output end of the main controller is electrically connected with the input end of the alarm module; the power supply circuit provides required working power supply for the voltage detection module, the A/D converter, the main controller and the alarm module. The utility model is simple in operation, can effectively submit detection efficiency, can not have the risk of switch malfunction simultaneously.
Description
Technical Field
The utility model relates to a power grid fortune dimension technical field, more specifically relates to a cable is to core detection device.
Background
In recent years, the withdrawing, the connecting and the using of a large number of secondary cables are involved just during the relay protection reconstruction of a power grid transformer substation and the production peak of a new transformer substation.
In the traditional operation method, as shown in fig. 1, one end of a cable core is connected to the ground, and the other end of the cable core is connected to the ground through a universal meter, so that the method is complicated in process and low in efficiency; under the conditions of longer cable, larger interference, bad transformer substation grounding grid and the like, the ground measurement resistance is larger and has large discreteness, and the risk of field misjudgment is increased. At present, mature technologies and products exist in the market for detecting and searching cores of weak current lines such as a network cable breakpoint detector, the network cable breakpoint is detected accurately, but for checking secondary cable cores, a core aligning method for selectively using a universal meter to make and break is basically adopted in a transformer substation construction site.
The method has the following defects:
(1) before core alignment, the voltage of each cable core needs to be measured one by one, the alternating current voltage and the direct current voltage need to be measured, the process is complicated, and the efficiency is low;
(2) the cable has the risk of short circuit or grounding of an alternating current loop and a direct current loop to the ground, and especially for a switch control loop, the incorrect cable has the risk of switch misoperation to the ground;
(3) under the conditions of longer cable, larger interference, bad transformer substation grounding grid and the like, the ground measurement resistance is larger and has large discreteness, and the risk of field misjudgment is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art and adopt the universal meter to have complex operation, inefficiency, and have the problem of switch malfunction risk, provide a cable to core detection device, its easy operation can effectively submit detection efficiency, can not have the risk of switch malfunction simultaneously.
In order to realize the above, the utility model discloses the purpose, the technical scheme of adoption as follows: a cable core alignment detection device comprises a voltage detection module, an A/D converter, a main controller, an alarm module and a power circuit; the voltage detection module is used for externally connecting a cable to be detected; the output end of the voltage detection module is electrically connected with the input end of the A/D converter; the output end of the A/D converter is electrically connected with the input end of the main controller; the output end of the main controller is electrically connected with the input end of the alarm module; the power supply circuit provides required working power supply for the voltage detection module, the A/D converter, the main controller and the alarm module.
The utility model discloses will the cable to the external two cables that wait to detect of core detection device, gather the voltage value through voltage detection module, will gather the voltage and pass through the AD converter and convert analog signal into digital signal and handle at input main control unit, if detect the voltage value and exceed the threshold value, then explain that this cable has the electricity, because there is the electricity to explain this cable core received the operation equipment on, it is risky to the cable signaling of having connected the operation equipment, probably leads to the protection maloperation. Therefore, the main controller controls the alarm module to give an alarm, so that the working personnel are reminded.
Preferably, the voltage detection module comprises a resistor R27, a sliding resistor RW4, a resistor R24, a first operational amplifier U1, a linear optocoupler, a second operational amplifier U1, a resistor R14, a capacitor C19, and a capacitor C20;
one end of the resistor R27 is externally connected with a lead wire to be measured; the other end of the resistor R27 is connected to the negative input end of the first operational amplifier U1 through a resistor R24;
one end of the sliding resistor RW4 is connected between the resistor R27 and the resistor R24; the other end of the sliding resistor RW4 is grounded; meanwhile, the other end of the sliding resistor RW4 is externally connected with another wire to be tested;
the positive input end of the first operational amplifier is grounded;
the capacitor C20 is connected in series with the negative input end of the first operational amplifier U1 and the output end of the first operational amplifier U1;
the output end of the first operational amplifier U1 is connected with a L ED-pin of a linear optical coupler, and a L ED + pin of the linear optical coupler is connected with a +5V power supply;
the negative input end of the first operational amplifier U1 is connected with a PD 1-pin of a linear optocoupler;
the PD1+ pin of the linear optocoupler is grounded;
a PD2+ pin of the linear optocoupler and the positive input end of a second operational amplifier U1;
a PD 2-pin of the linear optical coupler is connected with a negative input end of a second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and one end of the resistor R14 and one end of the capacitor C19 are connected with the output end of the second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and the other end of the resistor R14 and the capacitor C19 is connected with the negative input end of a second operational amplifier U1;
the output end of the second operational amplifier U1 is connected with the input end of the A/D converter.
Furthermore, the A/D converter adopts an A/D converter of PCF8951 model; the A/D converter is communicatively coupled to the host controller via an I2C serial bus.
Still further, the model of the main controller adopts STM32F 407.
Still further, the alarm module comprises a buzzer; one end of the buzzer is connected with the first output end of the main controller; the other end of the buzzer is connected with the power circuit.
Still further, the alarm module further comprises a first indicator light circuit and a second indicator light circuit; one end of the first indicator light circuit is connected with the second output end of the main controller; the other end of the first indicator light circuit is connected with a power circuit;
one end of the second indicator light circuit is connected with a third output end of the main controller; the other end of the second indicator light circuit is connected with the power circuit.
The first indicating lamp circuit comprises a red L ED light-emitting diode and a resistor R1, wherein one end of the red L ED light-emitting diode is connected with the second output end of the main controller, and the other end of the red L ED light-emitting diode is connected with the power circuit through a resistor R1;
still further, the second indicator light circuit comprises a green L ED light emitting diode and a resistor R2, one end of the green L ED light emitting diode is connected with a third output end of the main controller, and the other end of the green L ED light emitting diode is connected with the power circuit through an electron R2.
Still further, the system also comprises a human-computer interaction module; and the human-computer interaction module is in communication connection with the main controller.
Furthermore, the human-computer interaction module is a touch screen module; the touch screen module is in communication connection with the main controller.
The utility model has the advantages as follows: the utility model discloses a carry out voltage detection to the cable that awaits measuring, judge through voltage whether the cable connects on the operation equipment. Meanwhile, the alarm module is arranged for alarming and prompting, and can alarm rapidly. The utility model is simple in operation, can effectively submit detection efficiency, can not have the risk of switch malfunction simultaneously.
Drawings
Fig. 1 is a circuit block diagram of the cable-to-core detection device according to the present embodiment.
Fig. 2 is a schematic connection diagram of the voltage detection module according to the embodiment.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1, a cable core alignment detection device includes a voltage detection module, an a/D converter, a main controller, an alarm module, and a power circuit; the voltage detection module is used for externally connecting a cable to be detected; the output end of the voltage detection module is electrically connected with the input end of the A/D converter; the output end of the A/D converter is electrically connected with the input end of the main controller; the output end of the main controller is electrically connected with the input end of the alarm module; the power supply circuit provides required working power supply for the voltage detection module, the A/D converter, the main controller and the alarm module.
In the embodiment, the cable core-to-core detection device is externally connected with two cables to be detected, the voltage value is collected through the voltage detection module, the collected voltage is converted into a digital signal through the A/D converter, the digital signal is input into the main controller to be processed, if the voltage value is detected to exceed the threshold value, the cable is electrified, because the electrified cable core is connected to the operation equipment, the cable connected with the operation equipment is signaled, and protection misoperation can be caused. Therefore, the main controller controls the alarm module to give an alarm, so that the working personnel are reminded.
As shown in fig. 2, the voltage detection module includes a resistor R27, a sliding resistor RW4, a resistor R24, a first operational amplifier U1, a linear optocoupler, a second operational amplifier U1, a resistor R14, a capacitor C19, and a capacitor C20;
one end of the resistor R27 is externally connected with a lead wire to be measured; the other end of the resistor R27 is connected to the negative input end of the first operational amplifier U1 through a resistor R24;
one end of the sliding resistor RW4 is connected between the resistor R27 and the resistor R24; the other end of the sliding resistor RW4 is grounded; meanwhile, the other end of the sliding resistor RW4 is externally connected with another wire to be tested;
the positive input end of the first operational amplifier is grounded;
the capacitor C20 is connected in series with the negative input end of the first operational amplifier U1 and the output end of the first operational amplifier U1;
the output end of the first operational amplifier U1 is connected with a L ED-pin of a linear optical coupler, and a L ED + pin of the linear optical coupler is connected with a +5V power supply;
the negative input end of the first operational amplifier U1 is connected with a PD 1-pin of a linear optocoupler;
the PD1+ pin of the linear optocoupler is grounded;
a PD2+ pin of the linear optocoupler and the positive input end of a second operational amplifier U1;
a PD 2-pin of the linear optical coupler is connected with a negative input end of a second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and one end of the resistor R14 and one end of the capacitor C19 are connected with the output end of the second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and the other end of the resistor R14 and the capacitor C19 is connected with the negative input end of a second operational amplifier U1;
the output end of the second operational amplifier U1 is connected with the input end of the A/D converter.
The linear optical coupler is an optical coupler device for isolating analog signals, and the linear optical coupler really isolates current, so that the influence of the current in a cable on voltage can be prevented. The linear optocoupler can protect a tested object and a test circuit and reduce the influence of environmental interference on the test circuit. Meanwhile, the voltage value is amplified by the two-stage operational amplifier U1 in the embodiment, because the voltage value of the cable is small, the detection is not easy.
The A/D converter described in this embodiment adopts an A/D converter of PCF8951 model; the A/D converter is communicatively coupled to the host controller via an I2C serial bus. The PCF8591 has 4 analog inputs, 1 analog output and 1 serial I2And C, bus interface. The 3 address pins A0, A1, and A2 of PCF8591 may be used for hardware address programming, allowing access to 8 PCF8591 devices on the same I2C bus without additional hardware. Address and control of input and output in PCF8591 deviceAnd data signals are transmitted in a serial fashion over a two-wire bidirectional I2C bus. Therefore, the cable core detection device can be provided with 1-4 voltage detection modules simultaneously, and the voltage of the cable can be detected by the multiple voltage detection modules simultaneously, so that the detection efficiency is improved.
The model of the main controller adopts STM32F 407. The alarm module comprises a buzzer; one end of the buzzer is connected with the first output end of the main controller; the other end of the buzzer is connected with the power circuit. According to the embodiment, the alarm prompt is carried out through the buzzer, if the voltage is detected to be larger than the threshold value, the main controller controls the buzzer to carry out the alarm prompt, and therefore workers can be prompted timely. The buzzer is BUZI YD1407 type.
The alarm module further comprises a first indicator light circuit and a second indicator light circuit; one end of the first indicator light circuit is connected with the second output end of the main controller; the other end of the first indicator light circuit is connected with a power circuit; in the embodiment, if the voltage of the cable is lower than the threshold value, the main controller controls the second path of indicator light circuit to act, so that the indication of the indicator light is realized;
one end of the second indicator light circuit is connected with a third output end of the main controller; the other end of the second indicator light circuit is connected with the power circuit. If the power supply of the circuit is higher than the threshold value, the main controller controls the first path of indicator light circuit to work, and therefore indicator light prompting is achieved.
The first indicator light circuit comprises a red L ED light-emitting diode and a resistor R1, wherein one end of the red L ED light-emitting diode is connected with the second output end of the main controller, and the other end of the red L ED light-emitting diode is connected with a power circuit through the resistor R1;
the second indicator light circuit comprises a green L ED light-emitting diode and a resistor R2, one end of the green L ED light-emitting diode is connected with a third output end of the main controller, and the other end of the green L ED light-emitting diode is connected with the power circuit through an electron R2.
This embodiment sets up the emitting diode of two different colours to guarantee the effectual discernment of staff, can not obscure.
The system also comprises a human-computer interaction module; and the human-computer interaction module is in communication connection with the main controller. The human-computer interaction module is a touch screen module; the touch screen module is in communication connection with the main controller. The model of the touch screen module adopted in the embodiment is MTF0177 SN-13. The threshold value can be set through the touch screen module, so that the touch screen module is suitable for different working environments.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cable is to core detection device which characterized in that: the device comprises a voltage detection module, an A/D converter, a main controller, an alarm module and a power circuit; the voltage detection module is used for externally connecting a cable to be detected; the output end of the voltage detection module is electrically connected with the input end of the A/D converter; the output end of the A/D converter is electrically connected with the input end of the main controller; the output end of the main controller is electrically connected with the input end of the alarm module; the power supply circuit provides required working power supply for the voltage detection module, the A/D converter, the main controller and the alarm module.
2. The cable core alignment detection device of claim 1, wherein: the voltage detection module comprises a resistor R27, a sliding resistor RW4, a resistor R24, a first operational amplifier U1, a linear optocoupler, a second operational amplifier U1, a resistor R14, a capacitor C19 and a capacitor C20;
one end of the resistor R27 is externally connected with a lead wire to be measured; the other end of the resistor R27 is connected to the negative input end of the first operational amplifier U1 through a resistor R24;
one end of the sliding resistor RW4 is connected between the resistor R27 and the resistor R24; the other end of the sliding resistor RW4 is grounded; meanwhile, the other end of the sliding resistor RW4 is externally connected with another wire to be tested;
the positive input end of the first operational amplifier is grounded;
the capacitor C20 is connected in series with the negative input end of the first operational amplifier U1 and the output end of the first operational amplifier U1;
the output end of the first operational amplifier U1 is connected with a L ED-pin of a linear optical coupler, and a L ED + pin of the linear optical coupler is connected with a +5V power supply;
the negative input end of the first operational amplifier U1 is connected with a PD 1-pin of a linear optocoupler;
the PD1+ pin of the linear optocoupler is grounded;
a PD2+ pin of the linear optocoupler and the positive input end of a second operational amplifier U1;
a PD 2-pin of the linear optical coupler is connected with a negative input end of a second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and one end of the resistor R14 and one end of the capacitor C19 are connected with the output end of the second operational amplifier U1;
the resistor R14 and the capacitor C19 are connected in parallel, and the other end of the resistor R14 and the capacitor C19 is connected with the negative input end of a second operational amplifier U1;
the output end of the second operational amplifier U1 is connected with the input end of the A/D converter.
3. The cable core alignment detection apparatus according to claim 2, wherein: the A/D converter adopts an A/D converter with PCF8951 model; the A/D converter is communicatively coupled to the host controller via an I2C serial bus.
4. The cable core alignment detection device of claim 3, wherein: the model of the main controller adopts STM32F 407.
5. The cable core alignment detection device of claim 4, wherein: the alarm module comprises a buzzer; one end of the buzzer is connected with the first output end of the main controller; the other end of the buzzer is connected with the power circuit.
6. The cable core alignment detection device of claim 5, wherein: the alarm module further comprises a first indicator light circuit and a second indicator light circuit; one end of the first indicator light circuit is connected with the second output end of the main controller; the other end of the first indicator light circuit is connected with a power circuit;
one end of the second indicator light circuit is connected with a third output end of the main controller; the other end of the second indicator light circuit is connected with the power circuit.
7. The cable core-aligning detection device of claim 6, wherein the first indicator light circuit comprises a red L ED LED and a resistor R1, one end of the red L ED LED is connected with the second output end of the main controller, and the other end of the red L ED LED is connected with the power circuit through the resistor R1.
8. The cable core-aligning detection device of claim 7, wherein the second indicator light circuit comprises a green L ED LED and a resistor R2, one end of the green L ED LED is connected with the third output end of the main controller, and the other end of the green L ED LED is connected with the power circuit through an electronic R2.
9. The cable core alignment detection device according to any one of claims 2 to 7, wherein: the system also comprises a human-computer interaction module; and the human-computer interaction module is in communication connection with the main controller.
10. The cable core alignment detection device of claim 9, wherein: the human-computer interaction module is a touch screen module; the touch screen module is in communication connection with the main controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921961361.7U CN211014515U (en) | 2019-11-13 | 2019-11-13 | Cable core alignment detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921961361.7U CN211014515U (en) | 2019-11-13 | 2019-11-13 | Cable core alignment detection device |
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| CN211014515U true CN211014515U (en) | 2020-07-14 |
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| CN201921961361.7U Active CN211014515U (en) | 2019-11-13 | 2019-11-13 | Cable core alignment detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972598A (en) * | 2021-10-13 | 2022-01-25 | 国网四川雅安电力（集团）股份有限公司 | Multifunctional cable operation system |
-
2019
- 2019-11-13 CN CN201921961361.7U patent/CN211014515U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972598A (en) * | 2021-10-13 | 2022-01-25 | 国网四川雅安电力（集团）股份有限公司 | Multifunctional cable operation system |
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