CN202330515U - Multi-measuring range current measurement parallel display unit - Google Patents
Multi-measuring range current measurement parallel display unit Download PDFInfo
- Publication number
- CN202330515U CN202330515U CN2011204685531U CN201120468553U CN202330515U CN 202330515 U CN202330515 U CN 202330515U CN 2011204685531 U CN2011204685531 U CN 2011204685531U CN 201120468553 U CN201120468553 U CN 201120468553U CN 202330515 U CN202330515 U CN 202330515U
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- gauge head
- simulation display
- display gauge
- amplifier
- simulation
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Abstract
The utility model relates to a multi-measuring range current measurement parallel display unit, which comprises a sampling resistor, more than two analog display meters with different measuring ranges and a current-processing circuit, the current-processing circuit processes input current signals, so that the input current signals can be matched with the analog display meters with the different measuring ranges, and after being connected in series with the analog display meters, the current-processing circuit is then connected in parallel with the sampling resistor. When in use, the multi-measuring range current measurement parallel display unit does not need to switch sampling resistors, consequently, the affection on measured circuits is the same although the measuring ranges are different, the meters can simultaneously display, and thereby the efficiency of measurement is increased.
Description
Technical field
The utility model relates to the parallel display device of a kind of multirange current measurement, is used for testing current.
Background technology
Traditional multirange ammeter principle is as shown in Figure 1; Corresponding same display gauge head is provided with a plurality of different sample resistance R1, R2 and R3; Realize current measurement through craft or automatic switchover sample resistance to different ranges; The defective of doing like this is: when 1, switching different sample resistances, and can not the tested change in current of real-time follow-up; 2,, when causing different ranges to switch, the electrical quantity of circuit-under-test is had different influences because the sample resistance value of different ranges is different.
The utility model content
The utility model technical matters to be solved is to provide a kind of multirange current measurement display device that walks abreast.
The technical scheme of the utility model is: a kind of multirange current measurement display device that walks abreast; It comprises sample resistance, have the simulation display gauge head of different ranges more than two and thereby input current signal is handled the current processing circuit that matees different ranges simulation display gauge heads, and the current processing circuit is with to simulate display gauge head parallelly connected with sample resistance again after connecting.
Preferably; Described simulation display gauge head comprises the first simulation display gauge head, the second simulation display gauge head and the 3rd simulation display gauge head; Described current processing circuit comprises: be used for to input current signal carry out one-level amplify with first amplifier that matees the first simulation display gauge head, be used for to the further secondary of input current signal amplify with second amplifier that matees the second simulation display gauge head and to the further again three grades of amplifications of input current signal with mate the 3rd simulation display gauge head the 3rd amplifier; First amplifier out is connected with the first simulation display gauge head; Second amplifier out is connected with the second simulation display gauge head, and the 3rd amplifier out is connected with the 3rd simulation display gauge head.
Preferably; Described simulation display gauge head comprises the first simulation display gauge head, the second simulation display gauge head and the 3rd simulation display gauge head; Described current processing circuit comprise be used for to input current signal amplify with mate first the simulation display gauge head first amplifier, be used for to input current signal amplify with mate second the simulation display gauge head second amplifier and be used for to input current signal amplify with mate the 3rd the simulation display gauge head the 3rd amplifier; First amplifier and the first simulation display gauge head are connected back parallelly connected with sample resistance; Second amplifier out and the second simulation display gauge head are connected back parallelly connected with sample resistance, and be parallelly connected with sample resistance after the 3rd amplifier out and the 3rd simulation display gauge head are connected.
For adapting to the measurement of different electric currents, each is simulated the display gauge head planted agent and is provided with safety circuit, unlikely loss circuit when reaching the gauge outfit full scale, and this belongs to the common practise of this area.
The parallel display device of the multirange current measurement of the utility model need not to switch sample resistance when using, thereby range is different but identical to the influence of circuit-under-test, can a plurality of gauge outfits show simultaneously, has improved efficiency of measurement.
Description of drawings
Fig. 1 is the circuit theory diagrams of traditional multirange current measurement display device.
Fig. 2 is the circuit theory diagrams of the parallel display device of the utility model multirange current measurement.
Fig. 3 is the circuit theory diagrams of the parallel display device of embodiment 1 multirange current measurement.
Fig. 4 is the circuit theory diagrams of the parallel display device of embodiment 2 multirange current measurements.
Embodiment
Below in conjunction with embodiment the utility model is described further, but the protection domain of the utility model is not limited to this.
Embodiment 1
With reference to Fig. 2 and Fig. 3; A kind of multirange current measurement display device that walks abreast; It comprises that sample resistance R, three have the simulation display gauge head of different ranges and thereby input current signal is handled the current processing circuit that matees different ranges simulation display gauge heads, and the current processing circuit is with to simulate display gauge head parallelly connected with sample resistance R again after connecting.
Described simulation display gauge head comprises the first simulation display gauge head PA1, the second simulation display gauge head PA2 and the 3rd simulation display gauge head PA3; Described current processing circuit comprises: be used for to input current signal carry out one-level amplify with the first amplifier Q1 that matees the first simulation display gauge head, be used for to the further secondary of input current signal amplify with the second amplifier Q2 that matees the second simulation display gauge head and to the further again three grades of amplifications of input current signal with mate the 3rd simulation display gauge head the 3rd amplifier Q3; The first amplifier Q1 output terminal is connected with the first simulation display gauge head PA1; The second amplifier Q2 output terminal is connected with the second simulation display gauge head PA2, and the 3rd amplifier Q3 output terminal is connected with the 3rd simulation display gauge head PA3.
Embodiment 2
With reference to Fig. 2 and Fig. 4; A kind of multirange current measurement display device that walks abreast; It comprises that sample resistance, three have the simulation display gauge head of different ranges and thereby input current signal is handled the current processing circuit that matees different ranges simulation display gauge heads, and the current processing circuit is with to simulate display gauge head parallelly connected with sample resistance again after connecting.
Described simulation display gauge head comprises the first simulation display gauge head PA1, the second simulation display gauge head PA2 and the 3rd simulation display gauge head PA3; Described current processing circuit comprise be used for to input current signal amplify with mate first the simulation display gauge head the first amplifier Q1, be used for to input current signal amplify with mate second the simulation display gauge head the second amplifier Q2 and be used for to input current signal amplify with mate the 3rd the simulation display gauge head the 3rd amplifier Q3; The first amplifier Q1 and the first simulation display gauge head PA1 connect back parallelly connected with sample resistance R; The second amplifier Q2 output terminal and the second simulation display gauge head PA2 connect back parallelly connected with sample resistance R, and be parallelly connected with sample resistance R after the 3rd amplifier Q3 output terminal and the 3rd simulation display gauge head PA3 connect.
Claims (3)
1. the parallel display device of a multirange current measurement; It is characterized in that: thus it comprises sample resistance, has the simulation display gauge head of different ranges more than two and input current signal is handled the current processing circuit that matees different ranges simulation display gauge heads that the current processing circuit is with to simulate display gauge head parallelly connected with sample resistance again after connecting.
2. the multirange current measurement according to claim 1 display device that walks abreast; It is characterized in that: described simulation display gauge head comprises the first simulation display gauge head, the second simulation display gauge head and the 3rd simulation display gauge head; Described current processing circuit comprises: be used for to input current signal carry out one-level amplify with first amplifier that matees the first simulation display gauge head, be used for to the further secondary of input current signal amplify with second amplifier that matees the second simulation display gauge head and to the further again three grades of amplifications of input current signal with mate the 3rd simulation display gauge head the 3rd amplifier; First amplifier out is connected with the first simulation display gauge head; Second amplifier out is connected with the second simulation display gauge head, and the 3rd amplifier out is connected with the 3rd simulation display gauge head.
3. the multirange current measurement according to claim 1 display device that walks abreast; It is characterized in that: described simulation display gauge head comprises the first simulation display gauge head, the second simulation display gauge head and the 3rd simulation display gauge head; Described current processing circuit comprise be used for to input current signal amplify with mate first the simulation display gauge head first amplifier, be used for to input current signal amplify with mate second the simulation display gauge head second amplifier and be used for to input current signal amplify with mate the 3rd the simulation display gauge head the 3rd amplifier; First amplifier and the first simulation display gauge head are connected back parallelly connected with sample resistance; Second amplifier out and the second simulation display gauge head are connected back parallelly connected with sample resistance, and be parallelly connected with sample resistance after the 3rd amplifier out and the 3rd simulation display gauge head are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685531U CN202330515U (en) | 2011-11-23 | 2011-11-23 | Multi-measuring range current measurement parallel display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685531U CN202330515U (en) | 2011-11-23 | 2011-11-23 | Multi-measuring range current measurement parallel display unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330515U true CN202330515U (en) | 2012-07-11 |
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ID=46442491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204685531U Expired - Lifetime CN202330515U (en) | 2011-11-23 | 2011-11-23 | Multi-measuring range current measurement parallel display unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330515U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033667A (en) * | 2012-12-11 | 2013-04-10 | 工业和信息化部电子第五研究所 | Current measurement device and method |
| CN110286257A (en) * | 2019-06-20 | 2019-09-27 | 西安易朴通讯技术有限公司 | Electric current detecting method and device, electronic equipment and computer readable storage medium |
-
2011
- 2011-11-23 CN CN2011204685531U patent/CN202330515U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033667A (en) * | 2012-12-11 | 2013-04-10 | 工业和信息化部电子第五研究所 | Current measurement device and method |
| CN103033667B (en) * | 2012-12-11 | 2015-03-18 | 工业和信息化部电子第五研究所 | Current measurement device and method |
| CN110286257A (en) * | 2019-06-20 | 2019-09-27 | 西安易朴通讯技术有限公司 | Electric current detecting method and device, electronic equipment and computer readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |