CN204903744U - Hall sensor test is with a milliampere level constant current generating device - Google Patents
Hall sensor test is with a milliampere level constant current generating device Download PDFInfo
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- CN204903744U CN204903744U CN201520700117.0U CN201520700117U CN204903744U CN 204903744 U CN204903744 U CN 204903744U CN 201520700117 U CN201520700117 U CN 201520700117U CN 204903744 U CN204903744 U CN 204903744U
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- resistance
- stabilivolt
- hall element
- circuit
- constant current
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- Measuring Magnetic Variables (AREA)
Abstract
The utility model provides a hall sensor test is with a milliampere level constant current generating device of stable performance, with low costs, easy realization, it include the power, with voltage stabilizing circuit that the anodal electricity of power is connected, the 2nd voltage stabilizing circuit who is connected with the negative electricity of power, with a voltage stabilizing circuit and the 2nd voltage stabilizing circuit all correspond the change over switch that is connected and with the bleeder circuit of change over switch's output electricity connection, the change over switch alternative will a voltage stabilizing circuit or the 2nd voltage stabilizing circuit with the bleeder circuit electricity is connected, still include with the follower circuit that bleeder circuit connects, two outputs of follower circuit are as the incoming end that detects the hall sensor that awaits measuring.
Description
Technical field
The utility model relates to Hall element technical field, particularly relates to a kind of Hall element test milliampere level constant current generating means.
Background technology
Hall element is a kind of magnetic field sensor made according to Hall effect.Hall element can measure electric current and the voltage of random waveform, as: direct current, interchange, pulse waveform etc., even to the measurement of transient peak.The voltage and current that Hall voltage sensor and Hall current sensor are mainly applicable to industrial control field is measured, the requirement detecting to meet its GB to the index of some row is needed in Hall element manufacturing enterprise, a series of test will be carried out when dispatching from the factory test to Hall element, and when testing it, its one of them device that must use is milliampere level constant current source, and in current technology, its milliampere of level constant current source is generally bought from the market, it in use exists can not meet product test requirement, unstable properties, the shortcoming such as expensive, therefore, in order to meet the actual requirement of enterprise, a kind of stable performance of necessary design, cost is low, be easy to the milliampere level constant current source realized.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, adapts to reality need, provide a kind of stable performance, cost low, be easy to the Hall element test milliampere level constant current generating means that realizes.
In order to realize the purpose of this utility model, the technical scheme that the utility model adopts is:
Design a kind of Hall element test milliampere level constant current generating means, it comprises power supply; It is characterized in that: also comprise with the first mu balanced circuit that the positive pole of described power supply is electrically connected, with the second mu balanced circuit that the negative electricity of power supply is connected, with the first mu balanced circuit and the second mu balanced circuit all corresponding switch be connected and bleeder circuits be electrically connected with the output terminal of described switch, described switch is selected one and described first mu balanced circuit or the second mu balanced circuit is electrically connected with described bleeder circuit; Also comprise the follow circuit be connected with described bleeder circuit, two output terminals of described follow circuit are used as the incoming end detecting Hall element to be measured.
Further, described follow circuit comprises an operational amplifier, the in-phase input end of this operational amplifier is corresponding with the output terminal of described bleeder circuit to be electrically connected, and the inverting input of described operational amplifier and output terminal are used as the incoming end detecting Hall element to be measured.
Further, also comprise the current-limiting resistance R4 be connected with described follow circuit, one end of this current-limiting resistance R4 is connected with the inverting input of described operational amplifier, its other end ground connection.
Further, the resistance of described current-limiting resistance R4 is 51K.
Further, described bleeder circuit comprises the resistance R5 and variable resistor RP1 that are connected in parallel, and after resistance R5 and the input end of variable resistor RP1 be electrically connected with the in-phase input end of described operational amplifier, and after resistance R5 and the output head grounding of variable resistor RP1, described bleeder circuit also comprises the resistance R3 be electrically connected with described switch, and the other end of this resistance R3 is also electrically connected with the in-phase input end of described operational amplifier.
Further, the resistance of described resistance R3 is 10K; The resistance of described resistance R5 is 20K.
Further, described first mu balanced circuit comprises stabilivolt U1, the anode of this stabilivolt U1 is connected with the negative pole of power supply via resistance R1, the anode of described stabilivolt U1 is also electrically connected with the first input end of switch, the reference edge of described stabilivolt U1 is connected with the anode of this stabilivolt U1, the plus earth of described stabilivolt U1.
Further, described second mu balanced circuit comprises stabilivolt U2, and the negative electrode of this stabilivolt U2 is connected with the positive pole of power supply by resistance R2, and the negative electrode of described stabilivolt U2 is also electrically connected with the second input end of described switch; The anode of described stabilivolt U2 and the equal ground connection of reference edge.
Further, the resistance of described resistance R1 and resistance R2 is 2.7K.
Further, described stabilivolt U1 and stabilivolt U2 is TL431 stabilivolt; Described power supply is 15V power supply.
The beneficial effects of the utility model are:
1. its circuit design structure of the utility model is reasonable, is easy to realize in use can be Hall element and improves reliable and stable milliampere level constant current source, to guarantee the accuracy of the Hall element parameter detected.
2. the utility model also has other advantages, will propose in the lump with corresponding structure in an embodiment.
Accompanying drawing explanation
Fig. 1 is primary structure principle schematic of the present utility model;
Fig. 2 is circuit theory schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Embodiment 1: a kind of Hall element test milliampere level constant current generating means, see Fig. 1, Fig. 2; It comprises power supply, with the first mu balanced circuit that the positive pole of described power supply is electrically connected, with the second mu balanced circuit that the negative electricity of power supply is connected, with the first mu balanced circuit and the second mu balanced circuit all corresponding switch be connected and bleeder circuits be electrically connected with the output terminal of described switch, described switch is selected one and described first mu balanced circuit or the second mu balanced circuit is electrically connected with described bleeder circuit; Also comprise the follow circuit be connected with described bleeder circuit, two output terminals of described follow circuit are used as the incoming end detecting Hall element to be measured, for the performance detecting Hall element M.
Concrete, described power supply is 15V power supply, the first described mu balanced circuit comprises stabilivolt U1, the anode of this stabilivolt U1 is connected with the negative pole of power supply via resistance R1, the anode of described stabilivolt U1 is also electrically connected with the first input end (changing the pin 1 of switch S 1 in figure) of switch S1, the reference edge of described stabilivolt U1 is connected with the anode of this stabilivolt U1, the plus earth of described stabilivolt U1; The second described mu balanced circuit comprises stabilivolt U2, and the negative electrode of this stabilivolt U2 is connected with the positive pole of power supply by resistance R2, and the negative electrode of described stabilivolt U2 is also electrically connected with second input end (changing the pin 3 of switch S 1 in figure) of described switch; The anode of described stabilivolt U2 and the equal ground connection of reference edge; And the resistance of above-described resistance R1 and resistance R2 is 2.7K, and described stabilivolt U1 and stabilivolt U2 is TL431 stabilivolt.
Further, described bleeder circuit comprises the resistance R5 and variable resistor RP1 that are connected in parallel, and after resistance R5 and the input end of variable resistor RP1 be electrically connected with follow circuit, and after resistance R5 and the output head grounding of variable resistor RP1, described bleeder circuit also comprises the resistance R3 being electrically connected (being electrically connected with the pin 2 changing switch S 1 in figure) with described switch.
And above-described follow circuit comprises an operational amplifier U3, the other end of described resistance R3 is also electrically connected with the in-phase input end of described operational amplifier, and the resistance of described resistance R3 is 10K; The resistance of described resistance R5 is 20K.The in-phase input end of described operational amplifier U3 with in described bleeder circuit and after resistance R5 and the input end of variable resistor RP1 is corresponding is electrically connected, this device also comprises the current-limiting resistance R4 be connected with described follow circuit, one end of this current-limiting resistance R4 is connected with the inverting input of described operational amplifier U3, its other end ground connection, the resistance of described current-limiting resistance R4 is 51K, the inverting input of described operational amplifier U3 and output terminal are used as the incoming end detecting Hall element to be measured, namely between the inverting input that Hall element M to be measured accesses operational amplifier U3 and the output terminal of operational amplifier U3, namely can be the permanent Liu's power supply of milliampere level that Hall element M to be measured improves temperature.And in use can cross this limit switch and realize change and enter sense of current in Hall element M.
What embodiment of the present utility model was announced is preferred embodiment; but be not limited thereto; those of ordinary skill in the art; very easily according to above-described embodiment; understand spirit of the present utility model; and make different amplifications and change, but only otherwise depart from spirit of the present utility model, all in protection domain of the present utility model.
Claims (10)
1. a Hall element test milliampere level constant current generating means, it comprises power supply; It is characterized in that: also comprise the first mu balanced circuit be electrically connected with the positive pole of described power supply, the second mu balanced circuit be connected with the negative electricity of power supply,
With the first mu balanced circuit and the second mu balanced circuit all corresponding connect switch,
And the bleeder circuit to be electrically connected with the output terminal of described switch, described switch is selected one and described first mu balanced circuit or the second mu balanced circuit is electrically connected with described bleeder circuit;
Also comprise the follow circuit be connected with described bleeder circuit, two output terminals of described follow circuit are used as the incoming end detecting Hall element to be measured.
2. Hall element test as claimed in claim 1 milliampere level constant current generating means, it is characterized in that: described follow circuit comprises an operational amplifier, the in-phase input end of this operational amplifier is corresponding with the output terminal of described bleeder circuit to be electrically connected, and the inverting input of described operational amplifier and output terminal are used as the incoming end detecting Hall element to be measured.
3. Hall element test as claimed in claim 2 milliampere level constant current generating means, it is characterized in that: also comprise the current-limiting resistance R4 be connected with described follow circuit, one end of this current-limiting resistance R4 is connected with the inverting input of described operational amplifier, its other end ground connection.
4. Hall element test as claimed in claim 3 milliampere level constant current generating means, is characterized in that: the resistance of described current-limiting resistance R4 is 51K.
5. Hall element test as claimed in claim 4 milliampere level constant current generating means, it is characterized in that: described bleeder circuit comprises the resistance R5 and variable resistor RP1 that are connected in parallel, and after resistance R5 and the input end of variable resistor RP1 be electrically connected with the in-phase input end of described operational amplifier, and after resistance R5 and the output head grounding of variable resistor RP1, described bleeder circuit also comprises the resistance R3 be electrically connected with described switch, and the other end of this resistance R3 is also electrically connected with the in-phase input end of described operational amplifier.
6. Hall element test as claimed in claim 5 milliampere level constant current generating means, is characterized in that: the resistance of described resistance R3 is 10K; The resistance of described resistance R5 is 20K.
7. Hall element test as claimed in claim 1 milliampere level constant current generating means, it is characterized in that: described first mu balanced circuit comprises stabilivolt U1, the anode of this stabilivolt U1 is connected with the negative pole of power supply via resistance R1, the anode of described stabilivolt U1 is also electrically connected with the first input end of switch, the reference edge of described stabilivolt U1 is connected with the anode of this stabilivolt U1, the plus earth of described stabilivolt U1.
8. Hall element test as claimed in claim 7 milliampere level constant current generating means, it is characterized in that: described second mu balanced circuit comprises stabilivolt U2, the negative electrode of this stabilivolt U2 is connected with the positive pole of power supply by resistance R2, and the negative electrode of described stabilivolt U2 is also electrically connected with the second input end of described switch; The anode of described stabilivolt U2 and the equal ground connection of reference edge.
9. Hall element test as claimed in claim 8 milliampere level constant current generating means, is characterized in that: the resistance of described resistance R1 and resistance R2 is 2.7K.
10. Hall element test as claimed in claim 9 milliampere level constant current generating means, is characterized in that: described stabilivolt U1 and stabilivolt U2 is TL431 stabilivolt; Described power supply is 15V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520700117.0U CN204903744U (en) | 2015-09-11 | 2015-09-11 | Hall sensor test is with a milliampere level constant current generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520700117.0U CN204903744U (en) | 2015-09-11 | 2015-09-11 | Hall sensor test is with a milliampere level constant current generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204903744U true CN204903744U (en) | 2015-12-23 |
Family
ID=54925910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520700117.0U Expired - Fee Related CN204903744U (en) | 2015-09-11 | 2015-09-11 | Hall sensor test is with a milliampere level constant current generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204903744U (en) |
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2015
- 2015-09-11 CN CN201520700117.0U patent/CN204903744U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20170911 |