JP3216001U - AC electrodynamic inspection device, insurance device, current display device - Google Patents

Abstract

An alternating current inspection device, an insurance device, and a current display device having a large surveying range and high sensitivity are provided. An AC current inspection apparatus includes a first DC power supply circuit, a second DC power supply circuit, a stationary reference circuit, a micropotential sampling circuit, an AC voltage amplifier circuit, a detection circuit, a calibration circuit, and a signal display. The voltage output side of the first DC power supply circuit is connected to the power input side of the AC voltage amplifier circuit, the voltage output side of the second DC power supply circuit is connected to the power input side of the signal display, and the voltage input side of the steady reference circuit is the second Connect to the DC power supply circuit, connect the voltage output side of the steady reference circuit to the reference voltage input side of the signal display, connect the micro-potential sampling circuit to the AC power source to be measured, and the sampling voltage signal output side is the AC voltage amplification Connect to the input side of the circuit and connect the output side of the AC voltage amplifier circuit to the input side of the detector circuit, calibration circuit, and signal display in sequence. [Selection] Figure 1

Description

  The present invention relates to an alternating current inspection device, and particularly relates to an alternating current dynamic inspection device, an insurance device, and a current display device.

AC power surveying is a very important survey target in power surveying. There are several methods of traditional surveying AC current: serial voltage resistance method of universal table, electromagnetic conversion method of operational sensor, phase sensor test, and electro-magnetic-surgical method of electric power table. Among them, the maximum discrimination rate (example 4th and a half) of the Via resistance division table of the universal table and dedicated table is 100 microvolts, and the traditional surveying resistance method is 200Ω.
The above methods are large in scale with various rituals, mature products in industry and home use. More scientific, long-term energy saving, sustainable online surveying, especially mass production, large-scale distribution audit. The above method has exhaustive drawbacks: small survey range, low sensitivity, unscientific, large, heavy, material consumption, high cost, etc. This is because it must be sampled using absolute auxiliary consumable parts, whether it is an external connection voltage dividing resistor with high resistance voltage division or an electromagnetic conversion device. This measures AC current. Therefore, there are drawbacks such as small survey range, low sensitivity, unscientific, large, heavy, material consumption, high cost. On the other hand, the consumption of resources is obvious, for example, metal lumps for electromagnetic converters, insulating materials, copper materials, and the like.

  The present invention provides an AC electrodynamic inspection apparatus, an insurance apparatus, and a current display apparatus in order to overcome deficiencies in the AC electric inspection apparatus in the existing technology.

  In order to solve the above technical problems, the technical scheme adopted by the present invention is an AC electrodynamic inspection device, a first DC power supply circuit, a second DC power supply circuit whose supply voltage is lower than the first DC, and a steady reference circuit. Including the micro potential sampling circuit, at least the secondary AC expansion circuit, the detection circuit, the calibration circuit, and the signal display to expand the second class, the voltage export side of the first DC power supply circuit is connected to the power import side of the technical AC expansion circuit To do. The voltage export side of the second DC power line is connected to the power import side of the signal display. Connect the voltage import side of the steady reference circuit to the second DC power circuit. The voltage export side of the steady reference circuit is connected to the reference voltage import side of the signal display. Connect the sampling voltage signal export side to the import side of the frequent AC expansion circuit, and connect to the AC line where the micropotential sampling circuit is measured. The export side of the work frequency expansion circuit will be connected to the import side of the signal display through the detection circuit and the calibration circuit.

  Electromagnetic conversion COSΦ expansion sampling surveying circuit is also included. Used to measure AC power and phase signal of micro potential sampling circuit. When the micro-potential sampling circuit and the frequent AC expansion circuit are not connected, they are connected to the frequent AC expansion circuit.

  Another technical scheme adopted by the present invention is an insurance device, which includes a pressure contact mechanism, a lock fastener, a drive mechanism, a voltage comparison circuit, and the AC electrodynamic inspection device. The pressure contact mechanism sets the pressure contact between the reduction and the reverse. And it connects to the on / off switch of the load circuit which is protected when the press contact is driven.

  The micro potential sampling circuit is connected to the protected load trillion section. The export side of the calibration circuit is connected to the single import side of the voltage comparison circuit. The export side of the steady reference circuit is connected to one side of the voltage comparison circuit. The export side of the voltage comparison circuit is connected to the drive mechanism. The lock fastener is connected to the drive mechanism, affected by the drive mechanism cooperation or released press contact.

Furthermore, the drive mechanism is a restoring elastic material, a photoelectric switch, a magnet, and the lock fastener is electromagnetic iron,
The positive import side of the photoelectric switch is connected to the export side of the voltage comparison circuit. The negative import side is connected to the ground, and both export sides of the photoelectric switch are connected in series with electromagnetic wires and power supply. An electromagnetic iron core is located between the pressure contact and the magnet. In addition, the pressed object is absorbed and released together with the magnet when the iron core is magnetized. Reposition through the elastic recovery.

In addition, the first lump is used on the side of the pressure contact object, the second lump is used at the end of the iron core, and the first lump and the second lump are used together.

After that, the voltage comparison circuit will include a double-operating expander and an external circuit, and the photoelectric switch will connect the isolated three-sided control zone motive, the positive import end to the export side of the voltage comparison circuit. Connect the negative import side to the ground.

  Another technical scheme adopted by the present invention is a current display device, which displays the current of a high-voltage alternating current. It is the first DC power supply circuit, the second DC power supply circuit whose supply voltage is lower than the first DC, the steady reference circuit, the working AC expansion circuit that expands the second class, the detection circuit, the calibration circuit, the signal display, the high voltage The voltage export side of the sensor unit's first DC power supply circuit is connected to the power supply import side of the work AC expansion circuit. Connect the voltage export side of the second DC power circuit to the power import side of the signal display. Connect the voltage import side of the steady reference circuit to the second DC power circuit. Connect the voltage export side of the steady reference circuit to the reference voltage import side of the signal display. The export side of the work frequency expansion circuit connects the detection circuit and calibration circuit to the import side of the signal display.

  The high-pressure sensor device includes an insulating structure, a metal thread outside the insulating structure, and a wire that goes around it. Connect one side of the wire to the ground and the other side to the import side of the AC expansion circuit. The high voltage load line to be measured enters the insulation structure center. Compared with existing technology, the present invention has the following advantageous effects:

  1. The device of the present invention uses the first DC power supply circuit and supplies power to the work AC expansion circuit alone. The second DC power supply circuit with a low power supply voltage supplies the signal display alone. In addition to satisfying the work demands of the work AC expansion circuit and signal display, it is also possible to increase the magnification of the work AC expansion circuit. Multiple times greater than 10,000 times. As a result, the present invention can inspect AC power with lower Via resistance (below micro-ohm class). As a result, the measurement range of the present invention is expanded, the sensitivity increases, and the temperature effect decreases. Compared with existing surveying equipment, the present invention is more convenient for energy saving, high safety, low cost, small volume, light weight and surveying.

  2. The present invention includes a self-magnetic conversion COSΦ expansion sampling surveying circuit. Measure AC power and phase signal. Low Via resistance can inspect AC power dynamically. Distinguish between the power of AC power and the power of power.

  3. Electromagnetic conversion COSΦ expansion sampling surveying circuit includes phase table and small sensor device. Electricity and phase can be measured. In addition, the circuit structure is simple, the operation is convenient, and the cost is low.

  4. The first DC power supply circuit and the second DC power supply circuit are each charged with electric power. For industrial power, direct current is used by stepping down rectification. It is convenient

  5. The insurance device includes the main body, press contact case, seizure case, drive structure, voltage comparison circuit, and AC electrodynamic inspection device of the present invention. It can replace current technology AC fuses, overcurrent switches, and earth leakage switches. In addition, problems such as AC fuse, overcurrent switch, earth leakage switch slow reaction, insufficient accuracy, and inability to use for duplication can be solved.

  6. Current display device can measure high voltage AC power. Moreover, the structure of the high-pressure sensor device is simple, the volume is small, and the cost is low.

  The present invention will be described in more detail with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the AC electrodynamic inspection device, the insurance device, and the current display device.

These are the principle drawings of Example 1 of the present invention. These are the electrical circuit structure drawings of Example 1 of the present invention. These are some structure drawings of the alternating current insurance apparatus of Example 2 of this invention. These are the principle drawings of the electric current display apparatus of Example 3 of this invention. These are the structure drawings of the high voltage | pressure sensor device of Example 3 of this invention.

  Example 1, FIG. 1 and FIG. 2 show the AC electrokinetic inspection apparatus of the present invention. It is the first DC power circuit 1, the second DC power circuit 2 whose power supply voltage is lower than the power voltage of the first DC power circuit 1, the steady reference circuit 3, the micropotential sampling circuit 4, and at least the second class Frequent AC expansion circuit 5, detection circuit 6, calibration circuit 7, signal display 8, first DC power supply circuit 1 voltage export side is connected to power import side of frequent AC expansion circuit 5 power supply, second DC power supply circuit 2 voltage The exporter connects to the power importer of the signal display 8. The voltage import side of the steady reference circuit 3 is connected to the second DC circuit 2. The voltage export side of the steady reference circuit 3 is connected to the reference voltage import side of the signal display 8. The micropotential sampling circuit 4 is connected to the AC power to be measured. Moreover, the sampling voltage signal exporter is connected to the importer of the frequent AC expansion circuit 5. The export side of the work frequency expansion circuit 5 passes through the detection circuit 6 respectively. Calibration circuit 7 is connected to the import side of signal display 8. The type of the signal display 8 is tc7106, tc7107 or tc7129. The present invention also includes an electromagnetic conversion COSΦ expansion sampling surveying circuit. This includes the AC power and phase signal of the micropotential sampling circuit 4. When the micro-potential sampling circuit 4 is not connected to the frequent AC expansion circuit 5, it is connected to the frequent AC expansion circuit 5.

  In this embodiment, the micropotential sampling circuit 4 includes a part of the sampling lead R2. The sampling lead R2 is a copper lead having a round side. During the test, one end of the lead wire R2 is connected to the zero wire N of the concept T1 of the electric power 11 through the plaza P3. The other side is connected to Via resistance R3, R4 (protection resistance) on the import side of the work AC expansion circuit 5. One side of the Via resistor R4 is connected to the ground, and one side of the Via resistor R3 is connected to a tripod of the first arithmetic expander described below (that is, the same import side of the first arithmetic expander).

  Electromagnetic conversion COSΦ expansion sampling surveying circuit includes phase table 9 and small sensor device 10. One side of the line area of the small sensor device 10 is connected to the ground. Sampling timing When the sampling voltage signal export side of the lead wire R2 is not connected to the export side of the frequent AC expansion circuit 5, the one line side of the small sensor device 10 is connected to the import side of the frequent AC expansion circuit 5. (Connected to Via resistance R3, R4 on the import side of the so-called frequent AC expansion circuit 5) And the sampling lead R2 is put into the line of the small sensor device 10. Phase table 9 is connected to the export side of the expansion circuit 5 of the frequent AC expansion circuit. As a priority method, the sampling voltage signal export side of the sampling lead R2 and the one side of the line area of the small sensor device 10 are connected to the import side of the AC expansion circuit 5 with the single-sided switch 12. Specifically, the moving end of the single-sword double-sided switch 12 is connected to the import side of the work AC expansion circuit 5. The stationary end of the single-sword two-way switch 12 is connected to one side of the small-range sensor device 10. Another stationary unit of the single-sided switch 12 is connected to the sampling voltage signal export side of the sampling lead R2.

  In the present embodiment, the first DC power supply circuit 1 is taken out from the work voltage 11. Therefore, the supply voltage is ± (8-15) V. The maximum value is ± 9V. The first DC power supply circuit 1 is connected in parallel with the step-down capacitor C1, the release Via resistor R1, the rectified wave circuit, the step-down circuit C1, and the release resistor R1. One side is connected to 220V AC line through Plaza P3. One side is connected to the import side of the rectifier wave circuit. The voltage positive export side of the rectification wave circuit is connected to the power positive import side of the work frequency expansion circuit 5. The voltage negative export side of the rectification wave circuit is connected to the power source negative import side of the work AC expansion circuit 5. Specifically, the rectification wave circuit includes secondary pipes D1 and D2, capacitors C2 and C3, and stationary secondary pipes D3 and D4. The positive electrode of the secondary pipe D1 is connected to one side of the common point of the step-down capacitor C1 and the release resistor R1. The negative electrode of the secondary pipe D1, the positive electrode of the capacitor C2, and the negative electrode of the stationary secondary pipe D3 are connected. Therefore, the charging steady voltage is + 9V. In addition, we provide four legs (that is, the power supply negative import side) of the following first expansion expander and second expansion expander. The positive electrode of the capacitor C3 and the negative electrode of the stationary secondary pipe D4 are connected to the ground.

  In the present embodiment, the second DC power supply circuit 2 is also taken out from the operation power line 11. The power supply voltage is ± 5V. For steady reference circuit 3, the reference voltage is 2.5V. Moreover, the power supply voltage is ± 5V. The second DC power supply circuit 2 releases the step-down capacitor C8 and the VIA resistance value R16, and the rectifier wave circuit, the step-down capacitor C8 and the release resistance value R16 are connected in parallel. One side connects to the 220V AC power line through Plaza P3. One side is connected to the import side of the rectifier wave circuit. The voltage plus the export side of the rectified wave circuit is connected to the power source plus the import side of the signal display 8. The voltage minus export side of the rectification wave circuit is connected to the voltage minus import side of the signal display 8. The voltage import side of the steady reference circuit 3 is connected to the voltage of the rectifier wave circuit plus the export side. Specifically, the rectified wave circuit of the second DC power supply circuit 2 includes secondary pipes D7 and D8, capacitors C9 and C10, and stationary secondary pipes D9 and D10. The positive electrode of the secondary pipe D8 is connected to one side common to the step-down capacitor C8 and the release resistance value R16. Connected to the negative electrode of the secondary pipe D8 and the positive electrode of the capacitor C9, the negative electrode of the stationary secondary pipe D9, and thus a stable charging voltage of + 5V. In addition, a positive electrode is provided for the signal display 8. The negative electrode of the capacitor C9 and the positive electrode of the stationary secondary pipe D9 are connected to the ground. The negative electrode of the secondary pipe D7 is connected to one side of the common point of the step-down capacitor C8 and the release resistance value R16. The positive electrode of the secondary pipe D7 is connected to the negative electrode of the capacitor 10, and the positive electrode of the stationary secondary pipe D10, so that a stable charging voltage of −5V is obtained. The officer also provides a negative electrode for the signal display 8. Connect the positive electrode of capacitor C10 and the negative electrode of stationary secondary pipe D10 to the ground. The stationary reference circuit 3 connects one side of the resistance value R17, the stationary secondary pipe D3, and the resistance value R17 to the negative electrode of the stationary bipolar pipe D9. One side of resistance value R17 is connected to the negative electrode of stationary secondary pipe D3. So it provides a reference voltage of 2.5V. It is for signal display 8 display.

  In the present embodiment, the working frequency AC expansion circuit 5 includes a first operation expander U1A and a second operation expander U1B. The two supply power to the first DC power supply circuit 1. Therefore, alternating current expands symmetrically. Moreover, the resistance values of both feedback VIA resistors R5 and R8 are 10MΩ each. The import end of U1A, the first magnifying expansion device, will be the import of the work frequency expansion circuit 5. The export side of the first magnifying device U1A is connected to the importing side of the second magnifying device U1B. The export side of the second magnifying expansion device U1B becomes the export side of the work frequency expansion circuit 5. The signal of the sampling resistor R2 enters the first arithmetic expander U1A from the three legs of the first arithmetic expander U1A and performs expansion. The value responds to the two legs of the first arithmetic expander U1A from the feedback resistor R5. Determine the expansion factor of the first arithmetic expander U1A. The signal in it is also connected to the ground via resistor R0. The first arithmetic expander U1A passes the expanded signal through one leg, and the resistor R6 provides U1B to the second arithmetic expander. Expand the second grade. After that, the intermediate value is fed back to the six legs of the second arithmetic expander U1B through the seven legs of the second arithmetic expander U1B. The signal in it is also connected to the ground through R7, ending the expansion.

  The detection circuit 6 includes capacitors C11, C6, C5, secondary pipes D5, D6, and VIA resistors R12, R13, R10. The calibration circuit 7 includes VIA resistors R11, R14, R15, a potential device RP4, and a capacitor C7. Seven legs of the second arithmetic expander U1 B are connected to one side of the capacitor C11. One side of the capacitor C11 is connected to the negative electrode of the secondary pipe D5 and the positive electrode of the secondary pipe D6. After rectification to each other through the secondary pipes D5 and D6, the secondary pipe D6 is connected to the accumulated potential of the VIA resistor R10 and the capacitor C5 in parallel with the positive potential of rectification thereto. In addition, the resistor R11 connected to the potential and the capacitor C7 further overflow. Resistor R14 is then provided to potential device RP4. The head of it provides the export displayed as a potential signal of current. One side of the potential device RP4 is connected to one side of the resistor R15. One side of resistor R15 connects to the ground. The positive electrode of the secondary pipe D5 is connected in parallel with the resistor R12 and one side of the capacitor C6. One side of the resistor R12 and the capacitor C6 is connected in parallel with the resistor R10 and the capacitor C5. In addition, the resistor R13 is also connected. At the same time, resistor R13 connects to the ground. One side of the resistor R9, the capacitor C4, and the resistor R9 is connected to one side of the resistor R100 and the capacitor C5. One side of the resistor R9 is connected to the capacitor C4. Provided to 6 legs of the second magnifying device U1B. Capacitor C4 is used for overcurrent waves. Change export voltage more stably.

  In the present embodiment, an annular core or alloy thin film having an outer diameter of 2.3 cm, an inner diameter of 1 cm, and a height of 1.2 cm for the small sensor device 10. Rotate the Φ0.5mm purple copper wire in the annular body 100 times. Can be fixed with insulation. Includes signal display 8 combined with digital pipe drive circuit and multi-digital pipe display. Using ± 5V power supply, low consumption, accurate display.

  When actually measuring current and electric current, a purple lead with a diameter of 2.4 mm and a length of 4 cm measures an AC current of 20 A and COSΦ with a sampling lead R2. After enlarging detection, the displayed value is 1400 (value after adjusting the potential device RP4). If you calculate the Via resistance of this sampling lead R2, it should be resistivity / (parallel to lead radius * π) * lead length. That is, 1.851 * 10-8 / (0.00122 * 3.140) * 0.04, the resistance value of this sampling lead wire is 0.0001637473Ω, and when the magnification is increased 10,000 times, the value can be increased to 1.637473.

  The sampling lead wire R2 of the present invention is the original and 1 microvolt surveying method, so that no wear occurs, and on the other hand, it is not necessary to perform sampling processing on auxiliary parts other than the lead wire. Its current surveying arrangement is very large (no limit). At the same time, in the method of directly using the lead wire, it is not necessary to consider the mass production schedule of the auxiliary parts and the standard problem. Extremely limited data has very stable performance. Moreover, it is easy to guarantee consistency, and the surveying cost is low.

  In addition, if the direct online lead method is used, there are no auxiliary parts, so avoid safety problems of auxiliary parts such as sensor wire area and high VIA resistance. Therefore, safety is good.

  The present invention used the second grade expansion format. On the other hand, this type of unidirectional sampling current was obtained at a high magnification. The accuracy of signal expansion was also guaranteed. On the other hand, the magnification of the detection circuit 6 is set to a variable magnification format that can be controlled by the calibration circuit 7. So when calibrating, it does not affect the signal stability of first class. So stability and accuracy are high.

  The present invention measures AC current online with a low VIA resistance method. Therefore, a lot of inspection neglect and a plan can be cultivated. For example, a low resistance surveying machine, an electric power table, a universal table, an AC microvolt survey, a power table, a phase meter, an insurance switch, an insurance thread, an overcurrent switch, and a high-pressure sensor device. At the same time, it retains advantages such as super energy saving and high stability.

  The AC electrodynamic method includes the following steps.

  Fix the two sampling spots in the length direction and connect them to the same sampling lead. Sampling leads and spots are in the AC circuit being surveyed.

  The voltage difference between the two sampling spots expands through the frequent AC expansion circuit 5. The export of the expansion circuit 5 is connected to the import side of the signal display 8 through the detection circuit 6 and the calibration circuit 7, respectively. The signal display 8 displays the survey value of the alternating current between spots. The power supply voltage of the circuit AC expansion circuit 5 is larger than the power supply voltage of the signal display 8.

  Measure the magnitude of the two sampling spot AC currents with a standard instrument (for example, a can chart). Get a reference value.

  Compare survey values with reference values. At the same time, the calibration circuit 6 (that is, the potential device RP4 of the calibration circuit 6 is adjusted) is adjusted. Calibrate until the survey value matches the reference value.

  Electromagnetic conversion COSΦ expansion sampling surveying circuit to measure the intensity and phase signal of alternating current between spots: Electromagnetic conversion COSΦ expansion sampling surveying circuit includes a small sensor instrument and phase table. One side of the small sensor line is connected to the ground. When the voltage signal export side of the sampling lead is not connected to the export side of the frequent AC expansion circuit, one side of the small sensor line is connected to the import side of the frequent expansion circuit. Put the lead wire into the line area of the small sensor unit. Connect the import side of the phase table to the export side of the frequent AC expansion circuit. So the phase table can get the power and phase signal.

  The Via resistance value of the sampling lead can be determined, and at the same time, the expansion value and the total expansion factor of the frequent AC expansion circuit can be determined. Thus, the data can determine the current using Ohm's law. Budget value. Considering the actual situation, for example, contact with the ohmics on both sides of the sampling lead, errors in the enlarged electrical circuit, lead wire material, component changes, etc. Therefore, there is usually a slight difference between the budget value and the actual value. Therefore, the calibration circuit adjusts the correction to the survey value to match the actual value (reference value). The actual current on both sides of the sampling Via resistor can be reacted. After the calibration electric circuit was calibrated, it was adopted from the next time to inspect the device with the AC power of the present invention. There is no need to adjust the calibration circuit.

  In this embodiment, the VIA resistance value has been calculated by combining the resistivity of the sampling lead R2 and the geometric feature between the spots. Easy to control sampling lead RA2 value and temperature / humidity characteristics. Easy to achieve mass production consistency. In this method, the contact between the sampling lead R2 and the ohm of the circuit is not affected. It is very convenient to operate and cancel.

  See the reference in Example 2 and Figure 3. The insurance device of the present invention is realized by the design philosophy of the AC electrodynamic inspection device of Example 1. Specifically, the pressure contact mechanism, the locking mechanism, the drive mechanism, the voltage comparison circuit 16, and the example 1 are the AC electrodynamic inspection apparatus, and the pressure contact condition is 30. In addition, the pressure contact 30 is connected to a disconnection switch of a load circuit that is protected under pressure. Specifically, the press contact mechanism also includes a main body 20 and a press contact object 30. There is a first inversion elasticity 40 between 30 and 20 of the main body.

  Connected to the load series in which the micropotential sampling circuit 4 of the AC electrodynamic inspection device is protected. The export side of the calibration circuit 7 is connected to one side of the voltage comparison circuit. Connected to the export side of the steady reference circuit 3 and one side of the voltage comparison circuit. The export side of the voltage comparison circuit is connected to the drive mechanism. A locking fastener is on the side of the press contact 30 and connects to the drive mechanism. The lock or pressure contact 30 is released under the influence of the drive mechanism.

  In this embodiment, the drive mechanism is a reverse elastic case (defining the second reverse elastic case 70), the photoelectric switch, magnetic iron 80, the lock fastener is an electromagnetic product, and the positive import side of the photoelectric switch is the export side of the voltage comparison circuit. Connect. The negative importer is connected to the ground. Photoelectric switch both export side, electromagnetic iron wire sphere, power supply voltage are connected in series. Specifically, the export side of the photoelectric switch is connected to the ground. The other exporter connects with one side of the electromagnetic sphere 60. One side of 60 is connected to the power supply. This power supply voltage is specifically a power supply of 220V. The electromagnetic iron core 50 is located between the press contact 30 and the magnet 80. When the core 50 is magnetized, it is attracted to the magnet 80 and 30 is released. If the magnet performance of the core 50 is canceled, it is restored through the second restoring elasticity 70.

  In the present embodiment, the first lump 31 is set on the side surface of the press contact 30 and the second lump 51 is set on the end of the iron core 50. 31 and 51 move correspondingly.

  In the present embodiment, as shown in FIG. 3, the voltage comparison circuit 16 includes the twin-operating expander U1 of the core type LM358 and the outer circuit. Outer circuit includes Via resistance R18-R23. The export side of the work frequency expansion circuit 5 is connected to the plus import side of the double-running expansion device U1 through the detection circuit 6, the calibration circuit 7, and the Via resistance R21. The export side of the steady reference circuit 3 is connected to the minus import side of the double-operating expander U1 through the resistor R23. Resistors R18 and R20 are connected in parallel between the plus import side of U1 and the ground. Resistors R19 and R22 are connected in parallel between the negative import side of the double-operating expander U1 and the ground. The photoelectric switch is a light isolation three-end bidirectional driver U2. The core type is MOC3021M, and the plus importer is connected to the exporter of the double operator U1. Connect the minus import side to the ground.

The process of movement of the insurance device of the present invention is as follows:
When the pressure contact 30 is under pressure, the first restoring elastic member 40 is compressed, and the first lump 31 on the side surface of the pressure contact 30 is pressed against the second lump 51 of the iron core 50. The iron core 50 moves in the direction of the pressed object 30 that is separated. The second decompression elastic body 70 is compressed. At the bottom of the press contact 30, the on / off operation of the disconnect switch 90 is driven. Connect protected circuits. Moreover, by utilizing the fact that the iron core 50 is repositioned and the second lump 51 is above the first lump 31, the pressure contact 30 is stopped and the repositioning of the pressure contact 30 is limited.

  When the load to be protected fails, if the current value suddenly increases, the voltage on the plus import side of the double-operating expander U1 is larger than the reference voltage of 2.5V. The photoelectric switch opens. The electromagnetic line zone 60 is connected to electricity. After the iron core 50 is magnetized, it is attracted to the magnet 80. The press contact 30 is then released. The load circuit is stopped by turning the disconnecting switch 90 off by moving the pressure contact 30 upward.

  When the load circuit is not connected, the voltage on the plus import side of the double arithmetic expander U1 is smaller than the reference voltage. The photoelectric switch is restored, the electromagnetic iron wire sphere 60 is disconnected, and the iron core 50 is no longer magnetized. After investigating the cause of the overflow and eliminating the failure, the pressure contact 30 is used again.

  Refer to Fig. 4 and Fig. 5 for Example 3. The current display device of the present invention and the measurement of the current of the high-voltage AC power are based on realizing the design philosophy of the AC power retrieval device of Example 1. Specifically, the first DC power supply circuit 1, the low voltage second DC power supply circuit 2, the steady reference circuit 3, at least the second class expanded process AC expansion circuit 5, detection circuit 6, calibration circuit 7, signal display 8, high pressure sensor 14. The voltage import side of the first DC power supply circuit 1 is connected to the power import side of the work AC expansion circuit 5. Connect to the power supply import side of the signal display 8 on the voltage export side of the second DC power supply circuit 2. The voltage import side of the steady reference circuit 3 is connected to the second DC power supply circuit 2, and the voltage export side of the steady reference circuit 3 is connected to the reference voltage import side of the signal display 8. The export side of the work frequency expansion circuit 5 connects the detection circuit 6 and the calibration circuit 7 to the import side of the signal display 8 respectively.

  The high-pressure sensor 14 has a diameter of 40 cm, which connects the steel thread 142 that rotates around the outside of the insulating structures 141 and 141, the 142 line zone 143 that rotates through the inside of the 141, and one side of the line zone 143 to the ground. Connect the other side to the import side of the work frequency expansion circuit 5. The high-voltage load line 13 to be measured enters the center hole 144 of the insulating structure 141. The first DC power supply circuit 1 and the second DC power supply circuit 2 are taken from the work frequency 11. In addition, the first DC power supply circuit and the second DC power supply circuit include a DC power and a battery, respectively.

The above embodiment is an advanced description of the AC electrodynamic inspection device, insurance device, and current display device of the present invention, and is not limited to the embodiment of the present invention. On the basis of this, any simple modifications, similar changes and modifications to the embodiment belong to the protection scope of the technical solution of the present invention.

Claims (12)

An AC electrodynamic inspection device, a first DC power supply circuit, a second DC power supply circuit whose supply voltage is lower than that of the first DC power supply circuit, a steady reference circuit, a micropotential sampling circuit, and at least a second class expansion Including the frequent AC expansion circuit, detection circuit, calibration circuit, and signal display, the voltage export side of the first DC power supply circuit is connected to the power import side of the frequent AC expansion circuit, and the voltage export side of the second DC power circuit is the signal display. The voltage import side of the steady reference circuit is connected to the second DC power supply circuit, the voltage export side of the steady reference circuit is connected to the reference voltage import side of the signal display, and the micropotential sampling circuit is surveyed Connect to AC power, and the sampling voltage signal export side is connected to the import side of the frequent AC expanded circuit, and the export side of the frequent AC expanded circuit is the detection circuit and calibration in turn. Road is connected to the import side of the signal display,
Furthermore, if the micropotential sampling circuit is not connected to the frequent AC expanded circuit, including the electromagnetic conversion COSΦ expanded sampling surveying circuit, which is used for the measurement of the AC voltage and phase signal of the micropotential sampling circuit, the alternating current An AC electrodynamic inspection device characterized by being connected to an enlarged electric circuit. The micro-potential sampling circuit partially includes a sampling lead wire, the electromagnetic conversion COSΦ expansion sampling surveying circuit includes a phase table and a small sensor device, one side of the wire of the small sensor device is connected to the ground, and the sampling voltage signal of the lead wire If the exporter is connected or not connected to the import terminal of the industrial AC expansion circuit, connect one side of the small sensor device to the import side of the industrial circuit expansion circuit, and put the sampling lead into the small sensor device line. 2. The AC electrodynamic inspection apparatus according to claim 1, wherein the import side of the phase table is connected to the export side of the frequent AC expansion circuit. The first DC power supply circuit is taken out from the electric power supply, including the step-down capacitor, Via resistance leaving, rectifying circuit, connecting the step-down capacitor and VIA resistance leaving, and connecting to the 220V AC line through the plug on one side, Connect to the import side of the rectifier circuit, connect the voltage export side of the rectifier circuit to the power import side of the AC expansion circuit, and connect the negative export side of the rectification circuit to the power negative import side of the AC expansion circuit. The AC electrodynamic inspection apparatus according to claim 1. The second DC power supply circuit is taken out from the construction power line, and includes the step-down capacitor, Via resistance leaving, rectifying circuit, connecting the step-down capacitor and VIA resistance leaving, connecting to the 220V AC line through one side plug, one side rectifying circuit The voltage export side of the rectifier circuit is connected to the power supply import side of the signal display, the voltage negative export side of the rectifier circuit is connected to the voltage negative import side of the signal display, and the voltage import side of the steady reference circuit is connected to the voltage import side of the rectifier circuit 2. The AC electrodynamic inspection apparatus according to claim 1, wherein the AC electrokinetic inspection apparatus is connected to a voltage export side. The working frequency expansion circuit includes a first operation expansion unit and a second operation expansion unit, both supply power through the first DC supply circuit, and both feedback Via resistances are 10 MΩ, respectively. The import side of the expansion unit constitutes the import side of the AC expansion circuit, the export side of the 1st expansion device is connected to the import side of the 2nd expansion device, and the export side of the 2nd expansion device is the AC expansion circuit 4. The AC electrodynamic inspection apparatus according to claim 1, wherein the AC electrokinetic inspection apparatus is configured on the export side. The power supply voltage of the first DC power supply circuit is ± 9V, the power supply voltage of the second DC power supply circuit is ± 5V, and the power supply voltage of the stationary reference circuit is 2.5V. The AC electrodynamic inspection apparatus according to 1 or 3. Magnetic sensor or thin film alloy ring with outer diameter 2.3cm, inner diameter 1cm, height 1.2cm for the small sensor device, around the Φ0.5mm purple copper wire around the ring, fixed with insulation, wrapped, and piece 3. The AC power supply according to claim 2, further comprising a knife switch, wherein the sampling voltage signal export side of the sampling lead wire and the wire piece side of the small sensor device are connected to the import side of the working AC expansion circuit through this high knife switch. Dynamic inspection device. An insurance device comprising a pressure contact mechanism, a locking object, a drive mechanism, a voltage comparison circuit, and the AC electrodynamic inspection device according to any one of claims 1 to 7, wherein the pressure contact mechanism is provided with a repositioned pressure contact object, When the pressure contact mechanism is pushed, it is connected to the on-off circuit of the mounted circuit that is protected in the drive state,
Connected in series with the micro potential sampling circuit to be protected, the export side of the calibration circuit is connected to one side of the voltage comparison circuit, the export side of the steady reference circuit is connected to one side of the voltage comparison circuit, and the export of the voltage comparison circuit An insurance device characterized in that the side is connected to a drive mechanism, and the lock fastener is connected to the drive mechanism, thereby affecting the drive mechanism lock or pressure contact object. The drive mechanism includes a restoring elastic material, a photoelectric switch, a magnet, the locking fastener is electromagnetic iron, the positive import side of the photoelectric switch is connected to the export side of the voltage comparison circuit, the negative import side is connected to the ground, Both export side of photoelectric switch and electromagnetic iron wire and power supply are connected in series, and the iron core of electromagnetic iron is between the press contact and magnet, and when the iron core is magnetized, it is sucked together with the magnet and press contact 9. The AC electrodynamic inspection apparatus according to claim 8, wherein when the iron core is released and the iron core cancels the magnet, the iron core recovers through the recovery elastic material. The AC electrokinetic inspection apparatus according to claim 9, wherein the pressure contact has a first lump on a side surface, a second lump on an iron core side, and the first lump and the second lump act accordingly. 10. The AC electrodynamic inspection apparatus according to claim 9, wherein the voltage comparison circuit includes a double arithmetic expansion device and an outer circuit, and the photoelectric switch has a driver at three ends of light isolation. A current display device used for displaying a current of a high-voltage AC power, wherein the first DC power supply circuit, a second DC power supply circuit lower than the power supply voltage of the first DC power supply circuit, a steady reference circuit, and a process that expands at least second class. Including AC expansion circuit, detection circuit, calibration circuit, signal display, high-voltage sensor device, the voltage export side of the first DC power supply circuit is connected to the power supply import side of the AC expansion circuit, and the voltage export of the second DC power circuit Side is connected to the power import side of the signal display, the voltage import side of the steady reference circuit is connected to the second DC power supply circuit, the voltage export side of the steady reference circuit is connected to the reference voltage import side of the signal display, The export side of each connects the detection circuit and the calibration circuit with the import side of the signal display.
The high-voltage sensor device is connected to the insulation structure, the metal thread outside the insulation structure, and the wire that goes around the metal thread inside the insulation structure, one side of the line is connected to the ground, and one side is connected to the import side of the industrial AC expansion circuit A current display device characterized in that a high-voltage load line is inserted through the insulating structure center.