CN213240297U - Clamp-on meter circuit - Google Patents
Clamp-on meter circuit Download PDFInfo
- Publication number
- CN213240297U CN213240297U CN202021322356.4U CN202021322356U CN213240297U CN 213240297 U CN213240297 U CN 213240297U CN 202021322356 U CN202021322356 U CN 202021322356U CN 213240297 U CN213240297 U CN 213240297U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- pin
- power supply
- clamp meter
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a clamp meter circuit, which comprises a clamp meter control module, a flexible detection power supply module, a meter pen function module, an external 11V power interface module and an isolation power supply voltage conversion module; the clamp meter control module: the clamp meter is used for controlling the clamp meter; the external 11V power interface module: the flexible detection power supply module is used for boosting an external power supply to +/-15V and then stabilizing the voltage to +/-12V to supply power to the flexible detection power supply module; the flexible detection power supply module: for providing power to the flexible probe. The utility model relates to a pincerlike table circuit has increased a flexible detection power supply module, can use as flexible current probe, and the convenience is measured the electric wire of narrow department.
Description
Technical Field
The utility model relates to a pincerlike meter field, in particular to pincerlike meter circuit.
Background
When the current is measured by a common ammeter, the ammeter is connected to measure after the circuit is cut off and shut down, which is troublesome, and sometimes the motor which normally runs is not allowed to do so. At this time, the use of a clamp ammeter is more convenient, and the current can be measured without cutting off the circuit. The clamp meter can be changed into different measuring ranges through shifting of the change-over switch. But the operation is not allowed to be carried out in a charged state when shifting. The accuracy of the clamp-on meter is generally not high, and is usually 2.5-5 grades. For convenient use, the meter is also provided with transfer switches with different measuring ranges for measuring currents with different grades and measuring voltage.
The digital clamp ammeter is widely applied at present, functions of a plurality of multimeters are added to the clamp ammeter, such as voltage, temperature and resistance measurement, different functions can be selected through a knob, and the using method is almost the same as that of a common digital multimeter; however, the clamp of the general clamp meter is thick, and the wire at the narrow part of the test cannot pass through the clamp meter, so that the clamp meter and the internal circuit thereof need to be improved for the condition of testing the wire at the narrow part.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a clamp meter circuit.
The utility model provides a technical scheme that its technical problem adopted is:
a clamp meter circuit comprises a clamp meter control module, a flexible detection power supply module, a meter pen function module, an external 11V power interface module and an isolation power supply voltage conversion module;
the clamp meter control module: the clamp meter is used for controlling the clamp meter;
the external 11V power interface module: the flexible detection power supply module is used for boosting an external power supply to +/-15V and then stabilizing the voltage to +/-12V to supply power to the flexible detection power supply module;
the flexible detection power supply module: for providing power to the flexible probe.
Furthermore, the flexible detection power supply module comprises an operational amplifier U13 and an operational amplifier U14, a resistor R65 is connected to a NULL pin of the operational amplifier U13, a resistor R64 is connected to a-IN pin of the operational amplifier U13, a resistor R63 is connected to a + IN pin of the operational amplifier U13, a potential of-12V is connected to a pin 4 of the operational amplifier U13, and a potential of V of the operational amplifier U13OUTOne end of a capacitor C43, V of the operational amplifier U13 is connected to a pin+The pin is connected with a potential of +12V, and the operational amplifier U14, a NULL pin is connected with one end of a slide rheostat RV3, a-IN pin of the operational amplifier U14 is connected with one end of a resistor R69, a + IN pin of the operational amplifier U14 is connected with the other end of a capacitor C43, and a V pin of the operational amplifier U13-The pin is connected with a potential of-12V, the COMP pin of the operational amplifier U14 is connected with one end of a capacitor C45, and the V of the operational amplifier U14OUTA resistor R70 is connected with a pin, and the V of the operational amplifier U14+The pin is connected with a potential of +12V, and the NULL pin of the operational amplifier U14 is connected with the other end of the slide rheostat RV 3.
Further, the operational amplifier U13 has a model LT1360 and the operational amplifier U14 has a model LT 1222.
Further, the meter pen function module comprises a chip U1, and the model number of the chip U1 is DTM 0660.
Further, the stylus function module comprises a chip U2, and the model of the chip U2 is AT24C 02.
Further, the clamp meter control module comprises an operational amplifier U4A, an operational amplifier U4B and an operational amplifier U5A, wherein the models of the operational amplifier U4A, the operational amplifier U4B and the operational amplifier U5A are TLC 2252.
Further, the clamp meter control module further comprises a hall current sensor H1, and the hall current sensor H1 is MG910 in type.
Further, the external 11V power interface module includes a chip U9 and a chip U10, where the model of the chip U9 is LT1307B, and the model of the chip U10 is LT 1614.
The utility model has the advantages that: the utility model relates to a pincerlike table circuit has increased a flexible detection power supply module, can use as flexible current probe, and the convenience is measured the electric wire of narrow department.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic diagram of a circuit structure of a flexible detection power supply module in a pincer-shaped meter circuit according to the present invention;
FIG. 2 is a schematic diagram of a circuit structure of a clamp meter control module in a clamp meter circuit according to the present invention;
fig. 3 is a schematic circuit structure diagram of a stylus function module in a pincer-shaped meter circuit according to the present invention;
FIG. 4 is a schematic diagram of a circuit structure of an external 11V power interface module in a clamp meter circuit according to the present invention;
fig. 5 is a schematic diagram of a circuit structure of the isolation power supply voltage conversion module in the clamp meter circuit according to the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
Referring to fig. 1 to 5, the utility model provides a clamp meter circuit, which comprises a clamp meter control module, a flexible detection power supply module, a meter pen function module, an external 11V power interface module and an isolation power supply voltage conversion module;
as shown in fig. 2, the clamp meter control module: the clamp meter is used for controlling the clamp meter;
as shown in fig. 4, the external 11V power interface module: the flexible detection power supply module is used for boosting an external power supply to +/-15V and then stabilizing the voltage to +/-12V to supply power to the flexible detection power supply module;
as shown in fig. 1, the flexible detection power supply module: for supplying power to a flexible probe, including an operational amplifier U13 model LT1360And an operational amplifier U14 with model LT1222, wherein a resistor R65 is connected to a NULL pin of the operational amplifier U13, a resistor R64 is connected to a-IN pin of the operational amplifier U13, a resistor R63 is connected to a + IN pin of the operational amplifier U13, and a V of the operational amplifier U13-The pin is connected with a potential of-12V, and the V of the operational amplifier U13OUTOne end of a capacitor C43, V of the operational amplifier U13 is connected to a pin+The pin is connected with a potential of +12V, the NULL pin of the operational amplifier U14 is connected with one end of a slide rheostat RV3, the-IN pin of the operational amplifier U14 is connected with one end of a resistor R69, the + IN pin of the operational amplifier U14 is connected with the other end of a capacitor C43, the V-pin of the operational amplifier U14 is connected with a potential of-12V, the COMP pin of the operational amplifier U14 is connected with one end of a capacitor C45, and the V of the operational amplifier U14 is connected with the voltage of-12VOUTA resistor R70 is connected with a pin, and the V of the operational amplifier U14+The pin is connected with a potential of +12V, and the NULL pin of the operational amplifier U14 is connected with the other end of the slide rheostat RV 3.
Further, the meter pen function module comprises a chip U1, and the model number of the chip U1 is DTM 0660.
Further, the stylus function module comprises a chip U2, and the model of the chip U2 is AT24C 02.
Further, the clamp meter control module comprises an operational amplifier U4A, an operational amplifier U4B and an operational amplifier U5A, wherein the models of the operational amplifier U4A, the operational amplifier U4B and the operational amplifier U5A are TLC 2252.
Further, the clamp meter control module further comprises a hall current sensor H1, and the hall current sensor H1 is MG910 in type.
Further, the external 11V power interface module includes a chip U9 and a chip U10, where the model of the chip U9 is LT1307B, and the model of the chip U10 is LT 1614.
The whole clamp-on meter circuit is composed of a flexible detection power supply module, a clamp meter control module, a meter pen function module, an external 11V power supply interface module, an isolation power supply voltage conversion module and a display screen, wherein the external 11V power supply interface module is boosted to +/-15V through a chip LT1614 and a chip LT1307B, then is stabilized to +/-12V through a voltage stabilizing diode to supply power to the flexible detection power supply module, and the +15V boosted by the chip LT1307B is converted into 3V through the isolation power supply voltage conversion module. The P1 is a test signal inlet, a signal is input from the P1 to a 3V power supply and is connected from VDD to supply power to the chip to work, the test uses a stylus function module, the signal is connected from the P2, the S1A is a wheel disk function, and the signal is processed and displayed on the display screen CN 5. The clamp meter control module is characterized in that 1,2,3 and 4 are upper and lower magnetic cores of a clamp meter clamp, a tested conductor passes through the magnetic cores to obtain an output signal of a Hall current sensor H1, the output signal is amplified and output to a central instruction processing chip U1 through an operational amplifier U4A and an operational amplifier U4B, and finally the output signal is output to a display screen to display the reading of the signal. The flexible detection power supply module comprises an RX2 and a resistor R61, test signals enter through an RX2 and an R61, are output to QA through a central instruction processing chip U1, and then display reading is displayed on a display screen, the clamp meter control module is connected with the flexible detection power supply module through a resistor R70, and the flexible detection power supply module is connected with the meter pen function module through a resistor R61.
The utility model relates to a pincerlike table circuit has increased a flexible detection power supply module, can use as flexible current probe, and the convenience is measured the electric wire of narrow department.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (8)
1. A clamp meter circuit, comprising: the clamp meter power supply device comprises a clamp meter control module, a flexible detection power supply module, a meter pen function module, an external 11V power interface module and an isolation power supply voltage conversion module;
the clamp meter control module: the clamp meter is used for controlling the clamp meter;
the external 11V power interface module: the flexible detection power supply module is used for boosting an external power supply to +/-15V and then stabilizing the voltage to +/-12V to supply power to the flexible detection power supply module;
the flexible detection power supply module: for providing power to the flexible probe.
2. The clamp meter circuit of claim 1, wherein: the flexible detection power supply module comprises an operational amplifier U13 and an operational amplifier U14, a NULL pin of the operational amplifier U13 is connected with a resistor R65, an-IN pin of the operational amplifier U13 is connected with a resistor R64, a + IN pin of the operational amplifier U13 is connected with a resistor R63, and a V pin of the operational amplifier U13 is connected with a resistor R63-The pin is connected with a potential of-12V, and the V of the operational amplifier U13OUTOne end of a capacitor C43, V of the operational amplifier U13 is connected to a pin+The pin is connected with a potential of +12V, the NULL pin of the operational amplifier U14 is connected with one end of a slide rheostat RV3, the-IN pin of the operational amplifier U14 is connected with one end of a resistor R69, the + IN pin of the operational amplifier U14 is connected with the other end of a capacitor C43, and the V pin of the operational amplifier U14 is connected with the other end of a capacitor C43-The pin is connected with a potential of-12V, the COMP pin of the operational amplifier U14 is connected with one end of a capacitor C45, and the V of the operational amplifier U14OUTA resistor R70 is connected with a pin, and the V of the operational amplifier U14+The pin is connected with a potential of +12V, and the NULL pin of the operational amplifier U14 is connected with the other end of the slide rheostat RV 3.
3. The clamp meter circuit of claim 2, wherein: the operational amplifier U13 is model LT1360 and the operational amplifier U14 is model LT 1222.
4. The clamp meter circuit of claim 1, wherein: the meter pen functional module comprises a chip U1, and the model of the chip U1 is DTM 0660.
5. The clamp meter circuit of claim 1, wherein: the meter pen functional module comprises a chip U2, and the model number of the chip U2 is AT24C 02.
6. The clamp meter circuit of claim 1, wherein: the clamp meter control module comprises an operational amplifier U4A, an operational amplifier U4B and an operational amplifier U5A, wherein the models of the operational amplifier U4A, the operational amplifier U4B and the operational amplifier U5A are TLC 2252.
7. The clamp meter circuit of claim 1, wherein: the clamp meter control module further comprises a Hall current sensor H1, and the model of the Hall current sensor H1 is MG 910.
8. The clamp meter circuit of claim 1, wherein: the external 11V power interface module comprises a chip U9 and a chip U10, wherein the model of the chip U9 is LT1307B, and the model of the chip U10 is LT 1614.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021322356.4U CN213240297U (en) | 2020-07-07 | 2020-07-07 | Clamp-on meter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021322356.4U CN213240297U (en) | 2020-07-07 | 2020-07-07 | Clamp-on meter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213240297U true CN213240297U (en) | 2021-05-18 |
Family
ID=75887104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021322356.4U Active CN213240297U (en) | 2020-07-07 | 2020-07-07 | Clamp-on meter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213240297U (en) |
-
2020
- 2020-07-07 CN CN202021322356.4U patent/CN213240297U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5923161A (en) | Graphical display device | |
| US5177447A (en) | Automated breakout box for automotive testing | |
| JP3816975B2 (en) | Manufacturing defect analyzer | |
| CN107783069A (en) | The on-line calibration system and method for DC measurement in integrated circuit test system | |
| JPH0472195B2 (en) | ||
| CN105258718A (en) | Comprehensive tester metering detection system, adapter, and metering test platform | |
| EP0003433A1 (en) | Improvements in or relating to the location of contact faults on electrically conductive cables | |
| CN213240297U (en) | Clamp-on meter circuit | |
| CN208847781U (en) | A kind of artificial multimeter | |
| JP2783548B2 (en) | In-circuit test apparatus and method | |
| CN216646688U (en) | Volt-ampere characteristic analysis and test device for semiconductor laser | |
| CN213210440U (en) | Small current measurement calibration framework for automatic integrated circuit tester | |
| CN109061524B (en) | Power supply test circuit and method | |
| CN111123073B (en) | Quick self-checking device of hardware board card | |
| CN218995566U (en) | Detection device of DVI unit of test system | |
| CN208537602U (en) | A kind of emulation clamp on amperemeter | |
| CN112363080A (en) | Double-body type independently working LED power supply | |
| CN220709578U (en) | Tester for temperature control box | |
| US3437925A (en) | Circuit for converting resistance values of unknown resistor to electrical potential signal for measurement purposes | |
| CN213689804U (en) | Direct current servo system printing board test system | |
| CN213780334U (en) | Intelligent automobile wire harness detection equipment | |
| CN218068041U (en) | Car machine test jig | |
| CN218162436U (en) | Electronic device | |
| CN214335172U (en) | Electric leakage testing device for ECU of automobile steering engine | |
| CN212965166U (en) | Multi-path contact couple detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |