CN220568241U - DC magneto-electric system galvanometer calibrating device - Google Patents
DC magneto-electric system galvanometer calibrating device Download PDFInfo
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- CN220568241U CN220568241U CN202320102679.XU CN202320102679U CN220568241U CN 220568241 U CN220568241 U CN 220568241U CN 202320102679 U CN202320102679 U CN 202320102679U CN 220568241 U CN220568241 U CN 220568241U
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- 238000012795 verification Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model provides a DC magneto-electric system galvanometer calibrating device, which comprises a cuboid shell, a terminal button, a power switch, a current reversing switch and a resistor potentiometer, wherein the terminal button comprises a DC power terminal button, a digital multimeter terminal button and a standard resistor terminal button, the resistor potentiometer comprises a coarse adjustment potentiometer, a fine adjustment potentiometer and a current limiting resistor, and the DC power terminal button is connected with a DC power supply and is connected with the power switch, the coarse adjustment potentiometer and the fine adjustment potentiometer in series to form a loop; the sliding ends of the coarse tuning potentiometer and the fine tuning potentiometer are respectively communicated with a rotary disk 7 and a rotary disk 2 of a current reversing switch K through a digital multimeter terminal button and a current limiting resistor; the positive electrode and the negative electrode of the standard resistor terminal button are respectively connected from the '1' and the '8' of the turntable, so that the rapid verification of the direct-current magneto-electric system galvanometer can be realized, the complexity of wiring is avoided, the portable type magneto-electric system galvanometer is convenient to carry, the verification efficiency is effectively improved, and the daily verification requirement of the direct-current magneto-electric system galvanometer is greatly met.
Description
Technical Field
The utility model belongs to the technical field of electrical measuring instruments, and particularly relates to a direct-current magneto-electric system galvanometer calibrating device.
Background
The DC magneto-electric galvanometer is a measuring instrument for measuring current and voltage, and is widely used as a zero position and balance indicator in a measuring line in equipment such as an electric bridge and a potentiometer. The DC magneto-electric galvanometer mainly checks whether tiny current or voltage exists in the circuit, has higher sensitivity, and is very important to verify.
The main performance indexes in the subsequent verification of the direct current magneto-electric galvanometer comprise a current division value or a current constant, a free oscillation period, an external critical resistance and the like, and according to the measurement principle in the verification procedure, the number of equipment required for verification of the performance indexes is large, the wiring is complex, the operation process is complicated, the verification efficiency is low, misoperation of personnel can occur in the verification process, and the inaccuracy of data is easy to cause; in addition, if on-site verification is needed, a large number of standard equipment and shorting bars are needed to be carried, so that the carrying is not facilitated, and meanwhile, the time and the labor are consumed, and the efficiency is affected.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, the present utility model provides a calibration device for a dc magneto-electric system galvanometer in order to solve the problems in the prior art and to rapidly calibrate each functional index of the dc magneto-electric system galvanometer.
The main technical scheme is as follows: the utility model provides a direct current magnetism electric system galvanometer calibrating installation, includes cuboid shape shell, wiring end knob, switch, current reversing switch K and resistance potentiometer, its characterized in that: the terminal button comprises a direct current power supply terminal button, a digital multimeter terminal button and a resistor terminal button, the resistor potentiometer comprises a coarse potentiometer R3, a fine potentiometer R4 and a current limiting resistor R1,
the direct current power supply terminal button is connected with a direct current power supply and is connected with a power switch in series, the coarse adjustment potentiometer R3 and the fine adjustment potentiometer R4 are connected in series, and the direct current power supply, the power switch, the coarse adjustment potentiometer R3 and the fine adjustment potentiometer R4 form a loop; the sliding ends of the coarse adjustment potentiometer R3 and the fine adjustment potentiometer R4 are respectively communicated with a rotary disc 7 and a rotary disc 2 of the current reversing switch K through a digital multimeter terminal button and a current limiting resistor R1; the positive electrode and the negative electrode of the resistor terminal button are respectively connected with the turntables '1' and '8' of the current reversing switch K.
Further, the direct current power terminal button, the digital multimeter terminal button and the resistor terminal button are both "+", and "-".
Further, the power switch is a low thermal potential switch.
Further, the limiting resistance of the coarse tuning potentiometer R3 is 10kΩ, the limiting resistance of the fine tuning potentiometer R4 is 1kΩ, the resistance value of the current limiting resistor R1 is also 1kΩ, and the contact resistance variation of the current reversing switch K is less than 0.01 Ω.
The utility model has the beneficial effects that: the stable power supply of 1.5V, the digital multi-purpose meter, the standard resistor and the detected galvanometer are respectively connected into the self-made direct current magneto-electric galvanometer calibrating device, so that the calibration of each functional index of the direct current magneto-electric galvanometer can be realized, the complexity of wiring and the misoperation of personnel in the calibrating process are avoided, the calibrating efficiency and the calibrating accuracy are improved, and meanwhile, the device is concentrated and small in arrangement and convenient to carry, and the requirements of laboratories and field calibration of the direct current magneto-electric galvanometers are greatly met.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 is a schematic diagram of the electrical measurement of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
fig. 3 is a schematic diagram of a current reversing switch according to the present utility model (bottom view, reversing switch "0");
wherein: 1. a power switch; 2. direct current power supply terminal button; 3. digital multimeter terminal button; 4. a resistor terminal button; 5. a coarse adjustment potentiometer R3; 6. fine-tuning potentiometer R4; 7. a current limiting resistor R1; 8. and a current reversing switch K.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Examples:
as shown in fig. 2, the home-made dc magneto-electric galvanometer calibrating device is in a cuboid shape, and comprises a dc power terminal 2, a digital multimeter terminal 3, a resistor terminal 4, a power switch 1, a coarse potentiometer 5, a fine potentiometer 6, a current limiting resistor 7 and a current reversing switch 8. The direct current power supply terminal button 2, the digital multimeter terminal button 3 and the resistor terminal button 4 are two terminal buttons of "+", "-", the power switch 1 is a low thermal potential switch and has two directions of on and off, the limit resistance of the coarse adjustment resistor potentiometer 5 is 10kΩ, the limit resistance of the fine adjustment resistor potentiometer 6 is 1kΩ, the resistance value of the current limiting resistor 7 is also 1kΩ, the coarse adjustment resistor potentiometer 5, the fine adjustment resistor potentiometer 6 and the current limiting resistor 7 are all three terminal connection, the contact resistance variation of the current conversion switch 8 is smaller than 0.01 Ω, the current conversion switch 8 has three directions of "+", "" 0 "-", wherein the bottom view structure diagram of the current conversion switch 8 is shown in fig. 3, and the current conversion switch is set at 0 position.
The electrical connection of the device is obtained by connecting the elements of the device of fig. 2 according to the measurement schematic of fig. 1.
If the current change-over switch 8 rotates to the "+" direction, the turnplate "5" is communicated with the "8", the "1" is communicated with the "4", the turnplate "5" is connected with the "-" of the ammeter terminal button 3, the turnplate "4" is connected with the current limiting resistor 7, and at the moment, the turnplates "1" and "8" are respectively connected to the "+" and "-" terminal buttons of the standard resistor terminal button 4, namely, the direction change of the current "+" is completed.
If the current change-over switch rotates to the "-" direction, the turnplate "5" is communicated with the "6", the "3" is communicated with the "4", the turnplate "6" is in short circuit with the "1", and the turnplate "8" is in short circuit with the "3", so that the communication between the turnplate "5" and the "1" is realized, the turnplate "8" is communicated with the "4", the turnplate "5" is connected with the "-" of the ammeter terminal 3, the turnplate "4" is connected with the current limiting resistor 7, the turnplates "1" and "8" are respectively connected to the "+", "-" of the standard resistor terminal 4, and at the moment, the "-" of the ammeter is connected with the "+" of the standard resistor, so that the reversing of the current "-" direction is completed.
In the verification process, only a stable power supply of 1.5V, a digital multimeter and a standard resistor are connected to corresponding end buttons of a self-made direct current magneto-electric galvanometer verification device, and then a direct current resistor box and a serial circuit of a detected galvanometer are connected to two ends of the standard resistor in parallel, so that verification of all functional indexes of the direct current magneto-electric galvanometer can be realized according to verification steps in verification rules.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (4)
1. The utility model provides a direct current magnetism electric system galvanometer calibrating installation, includes cuboid shape's shell, wiring end knob, switch (1), current reversing switch K (8) and resistance potentiometer, its characterized in that: the terminal button comprises a direct current power supply terminal button (2), a digital multimeter terminal button (3) and a resistor terminal button (4), the resistor potentiometer comprises a coarse potentiometer R3 (5), a fine potentiometer R4 (6) and a current limiting resistor R1 (7),
the direct-current power supply terminal button (2) is connected with a direct-current power supply and is connected with the power switch (1) in series, the coarse-adjustment potentiometer R3 (5) and the fine-adjustment potentiometer R4 (6) are connected in series, and the direct-current power supply, the power switch (1), the coarse-adjustment potentiometer R3 (5) and the fine-adjustment potentiometer R4 (6) form a loop; the sliding ends of the coarse adjustment potentiometer R3 (5) and the fine adjustment potentiometer R4 (6) are respectively communicated with a rotary disc 7 and a rotary disc 2 of a current reversing switch K (8) through a digital multimeter terminal button 3 and a current limiting resistor R1 (7); the positive electrode and the negative electrode of the resistor terminal button (4) are respectively connected with the turntables '1' and '8' of the current reversing switch K (8).
2. The direct current magneto-electric galvanometer verification device of claim 1, wherein: the direct current power supply terminal button (2), the digital multimeter terminal button (3) and the resistor terminal button (4) are two terminal buttons of "+", and "-".
3. The direct current magneto-electric galvanometer verification device of claim 1, wherein: the power switch (1) is a low-thermoelectric-voltage switch.
4. The direct current magneto-electric galvanometer verification device of claim 1, wherein: the limiting resistance of the coarse adjustment potentiometer R3 (5) is 10K omega, the limiting resistance of the fine adjustment potentiometer R4 (6) is 1K omega, the resistance value of the current limiting resistor R1 (7) is also 1K omega, and the contact resistance variation of the current reversing switch K (8) is less than 0.01 omega.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320102679.XU CN220568241U (en) | 2023-02-02 | 2023-02-02 | DC magneto-electric system galvanometer calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320102679.XU CN220568241U (en) | 2023-02-02 | 2023-02-02 | DC magneto-electric system galvanometer calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220568241U true CN220568241U (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320102679.XU Active CN220568241U (en) | 2023-02-02 | 2023-02-02 | DC magneto-electric system galvanometer calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220568241U (en) |
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2023
- 2023-02-02 CN CN202320102679.XU patent/CN220568241U/en active Active
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