CN106405201B - A kind of intellectual alarming in short range of electric power device - Google Patents

Abstract

The invention discloses an intelligent near-electricity alarm, which relates to the technical field of power system detection devices. The alarm includes a shell and an internal structure, and the internal structure includes a double-type alarm circuit. The double-type alarm circuit includes an electromagnetic change type alarm circuit and a current The variable alarm circuit, the electromagnetic variable alarm circuit includes an electromagnetic sensor, the current variable alarm circuit includes a digital display ammeter, the output terminals of the electromagnetic sensor and the digital display ammeter are connected to the input terminal of the PLC controller, and the output terminal of the PLC controller Connect the voice alarm and warning lights separately. The alarm can accurately judge whether it is charged without contact with the charged equipment, and uses three sets of magnetic induction coils, which can selectively use suitable magnetic induction coils for live equipment of different voltage levels.

Description

An intelligent proximity alarm

technical field

The invention relates to the technical field of power system detection devices.

Background technique

At present, there is one high-voltage electroscope widely used in substations for each voltage level, which is a dedicated electroscope for a single voltage level. Moreover, they are all contact electroscopes, and the corresponding level of electroscopes must be directly touched to the conductors to test whether the conductors are charged.

The insulation of the old-fashioned electroscope is reduced in bad weather, such as rainy, foggy, snowy and relatively humid environments, and it is easy to cause electric contact between workers. The contact and wind wheel are about 15 cm long, which is prone to interphase short circuit, The grounding condition and the alarm mode are single, only the sound and the wind wheel rotation, which are greatly affected by the environment. In severe cases, the electroscope wind wheel may not be seen or the alarm sound may not be heard.

Therefore, a new type of non-contact electrical testing device is needed now.

Contents of the invention

The technical problem to be solved by the present invention is to provide an intelligent near-electricity alarm, which can accurately judge whether it is charged without contacting with the charged equipment, and adopts three sets of magnetic induction coils, which can target the charged equipment with different voltage levels And selectively use the appropriate magnetic induction coil.

In order to solve the above problems, the technical solution adopted by the present invention is an intelligent proximity alarm, which includes a shell and an internal structure arranged in the shell, and the internal structure includes a dual sensor for sensing whether the device carries current type alarm circuit, the dual-type alarm circuit includes an electromagnetic variable alarm circuit and a current variable alarm circuit, the electromagnetic variable alarm circuit includes an electromagnetic sensor for detecting changes in the magnetic field, and the current variable alarm circuit includes For the digital display ammeter for detecting current changes, the output terminals of the electromagnetic sensor and the digital display ammeter are connected to the input terminal of the PLC controller, and the output terminals of the PLC controller are respectively connected to a voice alarm and a warning light.

Preferably, the electromagnetic variable alarm circuit includes a power supply, three magnetic induction coils connected in parallel at both ends of the power supply, each magnetic induction coil is also connected in series with a resistor, the resistance values of the three resistors are different, and each parallel circuit also has a There is a shunt switch, a first main control switch is arranged on one side of the power supply, and there are three electromagnetic sensors, which are respectively used to detect the change of the magnetic flux in the magnetic induction coil.

Preferably, the current change alarm circuit includes the three magnetic induction coils arranged in parallel, a resistor and a shunt switch connected in series with each magnetic induction coil, and further includes a series connection with the three magnetic induction coils arranged in parallel. A digital display ammeter, one side of the digital display ammeter is provided with a second main control switch.

Preferably, the output terminal of the digital display ammeter is connected to the input terminal of the PLC controller after passing through the digital-to-analog conversion module.

Preferably, the number of turns of the three magnetic induction coils is the same.

Preferably, both the voice alarm and the warning light are arranged on the housing, and the housing is also provided with five buttons for respectively controlling the three branch switches, the first active switch and the second main control switch.

The beneficial effect of the present invention is that the device can detect whether the equipment is charged without touching the charged equipment, which increases safety, and can select different magnetic induction coils for different voltage values to detect, increasing the detection efficiency. Sensitivity and good applicability.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention;

Fig. 2 is a schematic circuit diagram of the present invention;

Fig. 3 is a block diagram of the control principle of the present invention.

Among them, 1. shell, 2. digital display ammeter, 3. voice alarm, 4. warning light, 5. magnetic induction coil, 6. resistance, 7. shunt switch, 8. first main control switch, 9. second Two main control switches, 10, power supply, 11, button.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the present invention will be described in further detail: a kind of intelligent near-electricity alarm as shown in Figure 1, Figure 2 and Figure 3, this alarm comprises shell 1 and is arranged on shell 1 Internal structure, the internal structure includes a dual-type alarm circuit for sensing whether the device has current, the dual-type alarm circuit includes an electromagnetic change type alarm circuit and a current change type alarm circuit, and the electromagnetic change type alarm circuit includes An electromagnetic sensor for detecting changes in the magnetic field, the current change alarm circuit includes a digital display ammeter 2 for detecting current changes, the output terminals of the electromagnetic sensor and the digital display ammeter 2 are connected to the input terminal of the PLC controller, The output ends of the PLC controller are connected to the voice alarm 3 and the warning light 4 respectively.

The electromagnetic variable alarm circuit includes a power supply 10, three magnetic induction coils 5 connected in parallel to the two ends of the power supply 10, each magnetic induction coil 5 is also connected in series with a resistor 6, and the resistance values of the three resistors 6 are different. There is also a shunt switch 7 , a first main control switch 8 is provided on one side of the power supply 10 , and there are three electromagnetic sensors, which are respectively used to detect the change of the magnetic flux in the magnetic induction coil 5 .

The current variable alarm circuit includes the three magnetic induction coils 5 arranged in parallel, a resistor 6 connected in series with each magnetic induction coil 5 and a shunt switch 7, and also includes a series connection with the three magnetic induction coils 5 arranged in parallel. The digital display ammeter 2 is equipped with a second main control switch 9 on one side of the digital display ammeter 2.

The output end of the digital display ammeter 2 is connected with the input end of the PLC controller after passing through the digital-to-analog conversion module.

The number of turns of the three magnetic induction coils 5 is the same.

The voice alarm 3 and the warning light 4 are all arranged on the casing 1, and the casing 1 is also provided with five switches for respectively controlling the three shunt switches 7, the first active switch 8 and the second main control switch 9. button 11.

As shown in Fig. 1, Fig. 2 and Fig. 3, there are two ways to carry out electric inspection when in use. The first one is an electromagnetic change alarm circuit. When in use, the second main control switch 9 is now disconnected, and the first main control switch 9 is disconnected. The control switch 8 is closed, and which magnetic induction coil 5 to use is selected according to the voltage level of the live equipment to be tested. Since the resistance values of the resistors 6 connected in series with the three magnetic induction coils 5 are different, the same power supply 10 The currents passing through are different, and the magnetic flux passing through the corresponding magnetic induction coil 5 is also different. In this way, the magnetic induction coil 5 with different magnetic flux can be selected for detection according to the charged equipment with high or low voltage. The high voltage of the charged equipment has a great influence on the magnetic flux. Low-resistance circuits, because the resistance is low, the circuit current is large, so that the magnetic flux does not increase too much instantaneously, and the voltage of the charged equipment is low, the influence on the magnetic flux is small. You can choose a high-resistance circuit, because the resistance is high. The circuit current is small, Even if the magnetic flux changes very little, it can be detected. When a magnetic induction coil 5 is selected, its corresponding button 11 on the shell 1 is pressed, and its corresponding shunt switch 7 is opened, which can be used for detection. If the device When charged, the magnetic flux through the magnetic induction coil 5 will change, and the electromagnetic sensor will send a signal to the PLC controller after detection, and the PLC controller will control the voice alarm 3 to report to the police and the warning light 4 to flash.

If the current change type alarm circuit is selected for detection, then the first main control switch 8 is disconnected, the second main control switch 9 is closed, and a certain magnetic induction coil 5 is selected for detection. If the current of the charged device is large, that is, the voltage If the level is higher, the magnetic flux passing through the magnetic induction coil 5 is larger, that is, the magnetic flux changes greatly, so the resistance 6 can be selected to avoid exceeding the range of the digital display ammeter 2. If the voltage level of the live equipment is low , then the magnetic flux through the magnetic induction coil 5 is small, that is, the change of the magnetic flux is small, so the resistance value of the resistor can be selected to be small, so that the digital display ammeter 2 cannot detect the weak current because the current is too small. Similarly, the digital display ammeter 2 converts the digital signal into an analog signal and transmits it to the PLC controller, and the PLC controller controls the voice alarm 3 to alarm and the warning light 4 to flash.

The beneficial effect of the present invention is that the device can detect whether the equipment is charged without touching the charged equipment, which increases safety, and can select different magnetic induction coils for different voltage values to detect, increasing the detection efficiency. Sensitivity and good applicability.

Claims (4)

1. a kind of intellectual alarming in short range of electric power device, it is characterized in that：The alarm includes shell (1) and is arranged on interior in shell (1) Portion's structure, the internal structure include the double type warning circuit of electric current whether is carried for sensing apparatus, the double type alarm electricity Road includes electromagnetic change formula warning circuit and curent change formula warning circuit, and the electromagnetic change formula warning circuit includes examining The electromagnetic sensor of changes of magnetic field is surveyed, the curent change formula warning circuit includes the digital display electric current for detecting curent change The output terminal of table (2), the electromagnetic sensor and digital display ammeter (2) is all connected with the input terminal of PLC controller, the PLC The output terminal of controller connects phonetic alarm (3) and warning lamp (4) respectively, and the electromagnetic change formula warning circuit includes power supply (10), three magnetic induction loops (5) for being connected in power supply (10) both ends in parallel, each magnetic induction loop (5) is also connected, and there are one resistance (6), the resistance value of three resistance (6) is different, and there are one branch switch (7), power supply (10) sides on each parallel circuit The first master switch (8) is additionally provided with, the electromagnetic sensor is three and is respectively used to detect the magnetic flux in magnetic induction loop (5) Amount variation, the output terminal of the digital display ammeter (2) are connect after D/A converter module with the input terminal of PLC controller.

2. a kind of intellectual alarming in short range of electric power device according to claim 1, it is characterized in that：The curent change formula warning circuit Including described three magnetic induction loops (5) being arranged in parallel, the resistance (6) and branch switch connected with each magnetic induction loop (5) (7), the digital display ammeter (2) for the setting that is in series with three magnetic induction loops being arranged in parallel (5), the digital display ammeter are further included (2) side is equipped with the second master switch (9).

3. a kind of intellectual alarming in short range of electric power device according to claim 2, it is characterized in that：Three magnetic induction loops (5) The number of turn it is identical.

4. a kind of intellectual alarming in short range of electric power device according to claim 3, it is characterized in that：The phonetic alarm (3) and police Show that lamp (4) is arranged on the shell (1), be additionally provided on the shell (1) for respectively control three branch switches (7), Five buttons (11) of the first active switch (8) and the second master switch (9).