CN217787228U - Wide-range current signal indirect acquisition display control circuit - Google Patents
Wide-range current signal indirect acquisition display control circuit Download PDFInfo
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- CN217787228U CN217787228U CN202221963152.8U CN202221963152U CN217787228U CN 217787228 U CN217787228 U CN 217787228U CN 202221963152 U CN202221963152 U CN 202221963152U CN 217787228 U CN217787228 U CN 217787228U
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Abstract
The utility model provides a wide range current signal indirect acquisition display control circuit, belongs to and measures technical field, including digital voltmeter head, wave band switch and sampling circuit, sampling circuit is equipped with a plurality of current signal conversion voltage signal circuit according to different range current ranges, and every current signal conversion voltage signal circuit includes parallel connection's sampling resistance wire and potentiometre. The utility model discloses a to the timesharing control of digital voltage gauge outfit decimal point and sampling resistance, realize that digital voltage gauge outfit timesharing inserts each range decimal point and converts current signal into voltage signal circuit to insert different range voltage signal and digital voltage gauge outfit decimal point through the band switch and show current signal, the realization method is reliable, measures different range electric currents in succession and directly shows with the voltage signal form; the circuit has the advantages of strong practicability, high response speed, simple circuit structure, low cost, less required components, direct display of indicating values at low voltage and easy realization of miniaturization.
Description
Technical Field
The utility model belongs to the technical field of the current measurement, concretely relates to wide range current signal gathers indirectly and shows control circuit.
Background
The existing digital current measurement gauge head is selected according to the range, different current ranges correspond to different current gauge heads, a plurality of different range measurement gauge heads are often used in a continuous range current signal measurement field, the cost is high, errors are easy to make during reading, the measurement and check workload is large, the efficiency is low, the measurement mechanism is large in size, and the realization of the size miniaturization and the low cost of the measurement mechanism is not facilitated. There is therefore a need for improvements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the utility model provides a wide-range current signal indirect acquisition display control circuit, which has strong practicability, fast response speed, simple circuit constitution, few components, easy realization and direct indication display, and is suitable for the continuous-range current signal measurement field; and the measurement of alternating current and direct current signals can be flexibly realized by adjusting the corresponding signal input end of the digital meter head so as to overcome the defect that a plurality of current meter heads are connected in series in a loop to measure current.
The utility model adopts the technical proposal that: the wide-range current signal indirect acquisition display control circuit comprises a digital voltage meter head, a band switch and a sampling circuit, wherein the sampling circuit is provided with a plurality of current signal conversion voltage signal circuits according to current ranges with different ranges, the current measurement ranges of the current signal conversion voltage signal circuits are different, each current signal conversion voltage signal circuit comprises a sampling resistance wire and a potentiometer, and the sampling resistance wire is connected with the potentiometer in parallel; the band switch comprises a plurality of current range switch-on control positions, a plurality of small digit control positions and a plurality of ground wire control positions which correspond to the current signal conversion voltage signal circuits in quantity, and three knife positions I, II and III, wherein the knife position I is connected with a small digit point DP port on the digital voltage meter head, the knife position II is connected with an-in end on the digital voltage meter head, the knife position III is connected with a common end com on the digital voltage meter head, the plurality of current range switch-on control positions are respectively connected with common output ends, in parallel connection, of sampling resistance wires and potentiometers in the plurality of current signal conversion voltage signal circuits, the plurality of small digit control positions are respectively connected with different small digit positions on the digital voltage meter head, and the plurality of ground wire control positions are respectively connected with grounding ends, in parallel connection, of the sampling resistance wires and the potentiometers in the plurality of current signal conversion voltage signal circuits, of the other ends.
In order to further limit the technical scheme, the digital voltage gauge head adopts a +/-200 mv digital voltage gauge head, the band switch adopts a three-pole three-position band switch, three current range connection control bits, three decimal control bits and three ground wire control bits are correspondingly arranged on the band switch, and 3 current signal conversion voltage signal circuits are respectively provided with: the device comprises a current signal conversion voltage signal circuit, a current signal conversion voltage signal circuit and a current signal conversion voltage signal circuit, wherein the current signal conversion voltage signal circuit is connected by a sampling resistance wire of 0.11 omega and a potentiometer of 100 omega in parallel and is used for measuring a 2A range; the three current range switch-on control bits are respectively connected with the output ends of the 3 current signal conversion voltage signal circuits, the three decimal place control bits are respectively connected with the decimal places DP1, DP2 and DP3 on the digital voltage meter, and the three ground wire control bits are respectively connected with the grounding ends of the 3 current signal conversion voltage signal circuits.
In the technical scheme, the sampling resistance wire is a manganese copper wire or a constantan copper wire.
In the technical scheme, the +/-200 mv digital voltage meter head is powered by a direct current +28V power supply.
Compared with the prior art, the utility model advantage:
1. the scheme realizes that the digital voltage meter head is accessed to each range decimal point in a time-sharing way and converts a current signal into a voltage signal circuit by the time-sharing control of the decimal point of the digital voltage meter head and the sampling resistor, and the current signal is displayed by accessing different range voltage signals and the decimal point of the digital voltage meter head through the wave band switch, so that the realization method is reliable and practical, the current in different ranges is continuously measured and is directly displayed in a voltage signal form; compared with the common direct measurement mode of currents in different ranges, the current measuring device has the advantages of strong practicability, high response speed, simple circuit structure, low cost, few required components, direct display of the indicating value by small voltage and easy realization of miniaturization; the method is suitable for wide-range current measurement sites;
2. when the scheme is used for measurement, the current indirect measurement of a corresponding circuit can be completed only by operating the waveband switch to rotate to a corresponding range position, a decimal point is lightened at a proper position according to different ranges when a value is displayed, the value is directly displayed by small voltage, and different current signals can be repeatedly measured for multiple times by rotating the waveband switch;
3. the whole measuring system in the scheme only needs one digital voltage gauge head, the required sampling resistor is formed by winding a manganese copper wire or a constantan wire and a potentiometer, alternating current and direct current signal measurement is flexibly realized by adjusting the corresponding signal input end of the digital gauge head, and miniaturization is easily realized.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element described by the phrase "comprising a. -" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Please refer to fig. 1, which illustrates an embodiment of the present invention.
Example 1:
the wide-range current signal indirect acquisition display control circuit comprises a digital voltmeter head 1, a band switch 2 and a sampling circuit, wherein the sampling circuit is provided with a plurality of current signal conversion voltage signal circuits 3 according to current ranges with different ranges, the current measurement ranges of the current signal conversion voltage signal circuits 3 are different, each current signal conversion voltage signal circuit 3 comprises a sampling resistance wire 5 and a potentiometer 4, and the sampling resistance wire 5 and the potentiometer 4 are connected in parallel. The band switch 2 comprises a plurality of current range switch-on control positions 2-1, a plurality of decimal control positions 2-2, a plurality of ground wire control positions 2-3, three cutter positions I2-4, cutter positions II 2-5 and cutter positions III 2-6, wherein the current range switch-on control positions 2-1 correspond to the current signal conversion voltage signal circuits 3 in number, the cutter positions I2-4 are connected with a decimal point DP port on the digital voltage meter head 1, the cutter positions II 2-5 are connected with an in end on the digital voltage meter head 1, the cutter positions III 2-6 are connected with a common end on the digital voltage meter head 1, the current range switch-on control positions 2-1 are respectively connected with a common output end of sampling resistance wires 5 and potentiometers 4 in the plurality of current signal conversion voltage signal circuits 3 in parallel connection, the decimal control positions 2-2 are respectively connected with different decimal point positions on the digital voltage meter head 1, and the ground wire control positions 2-3 are respectively connected with a common end of the sampling resistance wires 5 and the grounding ends of the sampling resistance wires 4 in the plurality of current signal conversion voltage signal circuits 3 in parallel connection.
Example 2:
based on the structural principle of embodiment 1, the present embodiment takes 3 measurements with current ranges of 2A, 200mA and 20m as an example for explanation, and refer to fig. 1: the digital voltage gauge head 1 adopts a +/-200 mv digital voltage gauge head, and the +/-200 mv digital voltage gauge head adopts a direct current +28V power supply for power supply. The band switch 2 adopts a three-pole three-position band switch and is correspondingly provided with three current range switch-on control positions 2-1, three small digital control positions 2-2 and three ground wire control positions 2-3, wherein the three current range switch-on control positions 2-1 are respectively 2A, 200mA and 20m current gears, and the current signal conversion voltage signal circuits 3 are respectively provided with 3 current signal conversion voltage signal circuits and are respectively as follows: a current signal conversion voltage signal circuit which is connected by a sampling resistance wire 5 of 0.11 omega and a potentiometer 4 of 100 omega in parallel and is used for measuring the 2A range is connected, and a current meter of 2A is connected on the circuit in parallel; a current signal conversion voltage signal circuit which is connected by a sampling resistance wire 5 of 1.1 omega and a potentiometer 4 of 200 omega in parallel and is used for measuring a 200mA measuring range is connected, and a current meter of 200mA is connected on the circuit in parallel; a current signal conversion voltage signal circuit which is connected by a 22 omega sampling resistance wire 5 and a 30 omega potentiometer 4 in parallel and is used for measuring a 20mA measuring range is connected, and a 20mA ammeter is connected on the circuit in parallel; the three current range connection control bits 2-1 are respectively connected with the output ends of the 3 current signal conversion voltage signal circuits 3, the three decimal place control bits 2-2 are respectively connected with decimal place positions DP1, DP2 and DP3 on the digital voltage meter head 1, and the three ground wire control bits 2-3 are respectively connected with the grounding ends of the 3 current signal conversion voltage signal circuits 3.
Preferably, the sampling resistance wire 5 is a manganese copper wire or a constantan copper wire.
In the embodiment, the voltage drop and the decimal point of each range on each manganese copper wire sampling resistor are accessed in a time-sharing mode through the decimal point of the +/-200 mv digital voltage meter head and the time-sharing control of each manganese copper wire sampling resistor, the current signal is converted into the voltage signal, and the voltage signal of different ranges and the decimal point of the digital voltage meter head are accessed through the band switch 2 to display the current signal, so that the implementation method is reliable and practical, the current of different ranges is continuously measured, and the current is directly displayed in a voltage signal mode.
When in measurement, only the wave band switch is required to be operated to rotate to a corresponding range position, the current indirect measurement of the corresponding circuit can be completed, the decimal point is lightened at a proper position according to different ranges when in indicating value display, the indicating value is directly displayed in a small voltage mode, and the current signals of 2A, 200mA and 20m can be repeatedly measured for many times by rotating the wave band switch.
The specific working principle is as follows:
after a +/-200 mV digital voltage meter head is electrified by a +28V power supply, when a wave band switch 2 is switched to 2A, voltage drops of two ends A1 and C1 of 0.11 omega of a sampling resistance wire 5 of a manganese copper wire are connected to-in ends and com ends of the +/-200 mV digital voltage meter head, simultaneously decimal points DP and DP1 of the +/-200 mV digital voltage meter head are switched on, the DP1 is lightened, and the voltage value displayed by the meter head at the moment is a real-time current value (measuring range 2A).
When the wave band switch 2 is turned on to 200mA, the voltage of A2 and C2 at two ends of 1.1 omega of the sampling resistance wire 5 of the manganese copper wire is dropped to-in ends and com ends of the +/-200 mV digital voltage meter head, meanwhile, decimal points DP and DP3 of the +/-200 mV digital voltage meter head are switched on, the DP3 is lightened, and the voltage value displayed by the meter head at the moment is the real-time current value (the measuring range is 200 mA).
When the wave band switch 2 is switched to 20mA, the voltage of the A3 and C3 at two ends of 22 omega of the sampling resistance wire 5 is dropped to the-in end and the com end of the digital voltage meter head of +/-20 mV, simultaneously, the decimal points DP and DP2 of the digital voltage meter head of +/-200 mV are switched on, DP2 is lightened, and the voltage value displayed by the meter head at the moment is the real-time current value (the measuring range is 20 mA).
The utility model discloses through using in the test equipment of certain type boat appearance system for the multichannel current measurement efficiency of boat appearance system improves, and measurement accuracy improves, and current data is directly perceived and the artificial interpretation mistake that significantly reduces, makes boat appearance system test efficiency improve, and production debugging cycle shortens, and has reduced test equipment's manufacturing cost.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (4)
1. Display control circuit is gathered indirectly to wide region current signal, its characterized in that: the digital voltmeter comprises a digital voltmeter head (1), a band switch (2) and a sampling circuit, wherein the sampling circuit is provided with a plurality of current signal conversion voltage signal circuits (3) according to current ranges with different ranges, the current measurement ranges of the current signal conversion voltage signal circuits (3) are different, each current signal conversion voltage signal circuit (3) comprises a sampling resistance wire (5) and a potentiometer (4), and the sampling resistance wire (5) is connected with the potentiometer (4) in parallel; the band switch (2) comprises a plurality of current range switch-on control positions (2-1), a plurality of small digit control positions (2-2) and a plurality of ground wire control positions (2-3) which correspond to the current signal conversion voltage signal circuit (3) in number, three knife positions I (2-4), knife positions II (2-5) and knife positions III (2-6), wherein the knife positions I (2-4) are connected with a small digit point DP port on the digital voltage meter head (1), the knife positions II (2-5) are connected with an in end on the digital voltage meter head (1), the knife position resistance wires III (2-6) are connected with a common end com on the digital voltage meter head (1), the plurality of current range switch-on control positions (2-1) are respectively connected with a sampling resistance wire (5) in the plurality of current signal conversion voltage signal circuits (3) and one common output end of a potentiometer (4) which are connected in parallel, the plurality of current range switch-on control positions (2-1) are respectively connected with a plurality of current signal conversion voltage signal circuits (3) and a plurality of common output ends (5) which are connected with a plurality of common ground wire voltage conversion voltage signals (3) which are respectively connected with a plurality of small digit conversion voltage meter heads (3) in parallel, and a grounding end (3) are respectively connected with another common ground wire (3) which are connected with a plurality of common output ends.
2. The wide-range current signal indirect acquisition display control circuit of claim 1, wherein: the digital voltage meter head (1) adopts a +/-200 mv digital voltage meter head, the wave band switch (2) adopts a three-pole three-position wave band switch and is correspondingly provided with three current range switch-on control bits (2-1), three small digital control bits (2-2) and three ground wire control bits (2-3), and the number of the current signal conversion voltage signal circuits (3) is 3 and respectively: the current signal conversion voltage signal circuit is formed by connecting a sampling resistance wire (5) of 0.11 omega and a potentiometer (4) of 100 omega in parallel and is used for measuring the 2A range, the current signal conversion voltage signal circuit is formed by connecting a sampling resistance wire (5) of 1.1 omega and a potentiometer (4) of 200 omega in parallel and is used for measuring the 200mA range, and the current signal conversion voltage signal circuit is formed by connecting a sampling resistance wire (5) of 22 omega and a potentiometer (4) of 30 omega in parallel and is used for measuring the 20mA range; the three current range connection control bits (2-1) are respectively connected with the output ends of the 3 current signal conversion voltage signal circuits (3), the three decimal place control bits (2-2) are respectively connected with decimal place positions DP1, DP2 and DP3 on the digital voltage meter head (1), and the three ground wire control bits (2-3) are respectively connected with the grounding ends of the 3 current signal conversion voltage signal circuits (3).
3. The wide-range current signal indirect acquisition display control circuit of claim 2, wherein: the sampling resistance wire (5) is made of a manganese copper wire or a constantan copper wire.
4. The wide-range current signal indirect acquisition display control circuit of claim 2, wherein: the +/-200 mv digital voltage gauge head adopts a direct current +28V power supply to supply power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221963152.8U CN217787228U (en) | 2022-07-28 | 2022-07-28 | Wide-range current signal indirect acquisition display control circuit |
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| CN202221963152.8U CN217787228U (en) | 2022-07-28 | 2022-07-28 | Wide-range current signal indirect acquisition display control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015177A (en) * | 2017-06-01 | 2017-08-04 | 北京市京核鑫隆科技中心 | Magnetic declination dipmeter automatic range switching circuit |
| CN116840629A (en) * | 2023-05-11 | 2023-10-03 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
-
2022
- 2022-07-28 CN CN202221963152.8U patent/CN217787228U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015177A (en) * | 2017-06-01 | 2017-08-04 | 北京市京核鑫隆科技中心 | Magnetic declination dipmeter automatic range switching circuit |
| CN116840629A (en) * | 2023-05-11 | 2023-10-03 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
| CN116840629B (en) * | 2023-05-11 | 2024-06-04 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
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