CN203117257U - Current sensor - Google Patents
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- CN203117257U CN203117257U CN 201320020572 CN201320020572U CN203117257U CN 203117257 U CN203117257 U CN 203117257U CN 201320020572 CN201320020572 CN 201320020572 CN 201320020572 U CN201320020572 U CN 201320020572U CN 203117257 U CN203117257 U CN 203117257U
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Abstract
The utility model discloses a current sensor, comprising a soleplate, a toroidal magnetic core, a circuit board and a closure member. Specifically, the soleplate is provided with a central through hole and a surface of the soleplate is formed with an annular groove surrounding the central through hole. The toroidal magnetic core is provided with an opening and is disposed in the annular groove. The toroidal magnetic core surrounds the central through hole. The circuit board is disposed in the annular groove. The circuit board is provided with laser repairable and adjustable resistors and a detection circuit used to adjust the laser repairable and adjustable resistors. The closure member is disposed on the soleplate and covers the toroidal magnetic core and the circuit board. Work stability of the current sensor and detection precision are improved. The current sensor is simple in structure, convenient in adjustment, and practicality of the current sensor is improved.
Description
Technical field
The utility model relates to electron detection device manufacturing technology field, particularly a kind of current sensor.
Background technology
Current sensor is a kind of sensor that can experience tested electric current and convert usable output signal to.Be usually used in the alterating and direct current current test, the principle that current sensor detects electric current is based on Hall effect, and the Hall components and parts are responded to the magnetic field around the tested electric current and are translated into electric signal, then, through a series for the treatment of circuit, form and meet the requirements of simulating signal.Current sensor mainly is divided into open loop and closed loop two big classes.In the production run of traditional current sensor, when regulating the current sensor parameter, adopt the method for regulator potentiometer, the each point magnitude of voltage reaches regulatory function in the regulating circuit, but since the assembling finish after, potentiometer is exposed in the air, and because the influence of potentiometer self structure, in working environments such as vibration, high humidity, the resistance value of potentiometer self can produce change, influences current sensor output.
The utility model content
The utility model one of is intended to solve the problems of the technologies described above at least to a certain extent or provides a kind of useful commerce to select at least.For this reason, a purpose of the present utility model is to propose a kind of Stability Analysis of Structures and the high current sensor of accuracy of detection.
According to current sensor of the present utility model, comprising: mount pad, toroidal core, circuit board and closure member.Particularly, the surface of described mount pad with central through hole and described mount pad is formed with the annular groove around described central through hole; Toroidal core has opening, and described toroidal core is located in the described annular groove and around described central through hole; Circuit board, described circuit board are located in the described annular groove, and described circuit board has the overriding resistance of laser and is used for regulating the testing circuit of the overriding resistance of laser; Described closure member is located on the described mount pad and covers described toroidal core and described circuit board.
According to current sensor of the present utility model, circuit board is provided with the overriding resistance of laser, thus, in the production run of this current sensor, can repair accent to the overriding resistance of the laser on the circuit board, the error of avoiding producing in the assembling process causes the testing result of current sensor inaccurate, improves the accuracy of detection of current sensor.In addition, because the overriding resistance adjustment of laser is finished rear enclosed in annular groove, therefore, avoided circuit board and element thereof because of the phenomenon of the potentiometer job insecurity that is exposed to reasons such as air or vibrations and causes, stability and the accuracy of detection of current sensor work have been improved, simple in structure, easy to adjust, improved the practicality of current sensor.
In addition, according to the current sensor of the utility model above-described embodiment, can also have following additional technical characterictic:
In addition, described closure member is to have the through hole that cooperates with described central through hole on cover plate and the described cover plate.Thus, cover plate can cover the annular groove that is located on the mount pad with on the sealing mount pad, avoids extraneous impurity etc. to enter in the annular groove, and influences the measuring accuracy of current sensor, has improved the usability of this current sensor.In addition, structure of cover plate is simple, is convenient to moulding, has improved the efficiency of assembling of current sensor, and has reduced the moulding cost of current sensor.
Further, described bridge welding is connected on the described mount pad.Thus, make cover plate and mount pad easy for installation, improved the efficiency of assembling of current sensor, and improved the sealing effectiveness of current sensor further, make the testing result of current sensor more accurate.
In addition, be provided with sealing in the described annular groove and described sealing is full of described annular groove.Thus, sealing can be enclosed in toroidal core and circuit board in the annular groove of mount pad, avoids extraneous impurity to enter annular groove and influences the measuring accuracy of current sensor.In addition, can also improve the efficiency of assembling of current sensor and reduced the production cost of current sensor further.
In addition, described mount pad is that rectangular shape and described central through hole are rectangular opening.Thus, make the simple in structure of mount pad, be convenient to moulding and the assembling of mount pad, improved the production efficiency of current sensor.In addition, the mount pad of rectangular shape can also be convenient to the transportation of current sensor.
Further, this current sensor also comprises coil, and described coil encircling is on described toroidal core.Thus, the current sensor of closed loop has increased the accuracy of detection of current sensor further.
The overriding resistance of described laser comprises the overriding resistance of first to the 3rd laser, and described testing circuit comprises for detection of first testing circuit of the overriding resistance of described first and second laser with for detection of second testing circuit of the overriding resistance of described the 3rd laser.
Described first testing circuit comprises: positive power source terminal, negative power end, output terminal, first resistance and second resistance, wherein, one end of described first resistance links to each other with described positive power source terminal and the other end links to each other with first end of the overriding resistance of described first laser, one end of described second resistance links to each other with described negative power end and the other end links to each other with first end of the overriding resistance of described second laser, and second end of the overriding resistance of described first laser links to each other with described output terminal respectively with second end of the overriding resistance of described second laser.
Described first testing circuit comprises that also described first operational amplifier links to each other with described output terminal for first operational amplifier of the output signal of amplifying described output terminal.
Described second testing circuit comprises the 3rd resistance, Hall element, second operational amplifier and power end, wherein, one end of described the 3rd resistance links to each other and other end ground connection with the first input end of described second operational amplifier, one end of described Hall element links to each other with the output terminal of described second operational amplifier and the other end is connected between the first input end of described the 3rd resistance and described second operational amplifier, one end of the overriding resistance of described the 3rd laser links to each other and other end ground connection with second input end of described second operational amplifier, and described power end is connected between second input end of the overriding resistance of described the 3rd laser and described second operational amplifier.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the synoptic diagram of the current sensor of an embodiment of the present utility model;
Fig. 2 is the synoptic diagram of magnetic core of the current sensor of an embodiment of the present utility model;
Fig. 3 is the synoptic diagram of circuit board of the current sensor of an embodiment of the present utility model;
Fig. 4 is the synoptic diagram of first testing circuit of circuit board of the current sensor of an embodiment of the present utility model;
Fig. 5 is the synoptic diagram of second testing circuit of circuit board of the current sensor of an embodiment of the present utility model;
Fig. 6 is the process flow diagram of adjusting of circuit board of the current sensor of an embodiment of the present utility model;
Fig. 7 is the interface synoptic diagram of conditioning equipment of circuit board of the current sensor of an embodiment of the present utility model.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", close the orientation of indications such as " counterclockwise " or position is based on orientation shown in the drawings or position relation, only be the utility model and simplification description for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand the concrete implication of above-mentioned term in the utility model as the case may be.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, first feature second feature it " on " or D score can comprise that first and second features directly contact, can comprise that also first and second features are not directly contacts but by the contact of the additional features between them.And, first feature second feature " on ", " top " and " above " comprise first feature directly over second feature and oblique upper, or only represent that the first characteristic level height is higher than second feature.First feature second feature " under ", " below " and " below " comprise first feature under second feature and tiltedly, or only represent that the first characteristic level height is less than second feature.
Current sensor is a kind of sensor that can experience tested electric current and convert usable output signal to.Be usually used in the alterating and direct current current test, the principle that current sensor detects electric current is based on Hall effect, and the Hall components and parts are responded to the magnetic field around the tested electric current and are translated into electric signal, then, through a series for the treatment of circuit, form and meet the requirements of simulating signal.Current sensor mainly is divided into open loop and closed loop two big classes, and open loop class current sensor mainly is made up of magnetic core, circuit board, shell, casting glue, and closed loop class current sensor mainly is made up of magnetic core, coil, circuit board, shell, casting glue.
In the production run of traditional current sensor, when regulating the current sensor parameter, adopt the method for regulator potentiometer, the each point magnitude of voltage reaches regulatory function in the regulating circuit, but owing to the potentiometer that assembles the current sensor after finishing is exposed in the air, and the influence of potentiometer self structure, in working environments such as vibration, high humidity, the resistance value of potentiometer self can produce change, influences current sensor output.
In order to solve the problem that prior art exists, the utility model discloses a kind of online laser resistor trimming formula current sensor, replace potentiometer with the overriding resistance of laser, regulate the parameter substitution manually-operated with equipment and regulate.
Describe the current sensor of the utility model embodiment with reference to the accompanying drawings in detail.
As shown in Figure 1 to Figure 3, according to current sensor of the present utility model, comprising: mount pad 10, toroidal core 20, circuit board 30 and closure member (not shown).
Particularly, the surface (surface that namely as shown in Figure 1 make progress) of mount pad 10 with central through hole 101 and mount pad 10 is formed with the annular groove 102 around central through hole 101.Toroidal core 20 has opening 201, and toroidal core 20 is located in the annular groove 102 and around central through hole 101.Circuit board 30 is located in the annular groove 102, and circuit board 30 has the overriding resistance 31 of laser.Described closure member is located on the mount pad 10 and covers toroidal core 20 and circuit board 30.
Current sensor according to the utility model embodiment, circuit board 30 is provided with the overriding resistance 31 of laser, thus, in the production run of this current sensor, can repair accent to the overriding resistance 31 of the laser on the circuit board 30, the error of avoiding producing in the assembling process causes the testing result of current sensor inaccurate, improves the accuracy of detection of current sensor.In addition, because the overriding resistance 31 of laser is regulated and is finished rear enclosed in annular groove 102, therefore, avoided circuit board 30 and element thereof because of the phenomenon of the potentiometer job insecurity that is exposed to reasons such as air or vibrations and causes, stability and the accuracy of detection of current sensor work have been improved, simple in structure, easy to adjust, improved the practicality of current sensor.
In addition, in embodiment more of the present utility model, closure member is the cover plate (not shown), has the through hole (not shown) that cooperates with central through hole 101 on this cover plate.Thus, cover plate can cover the annular groove 102 that is located on the mount pad 10 with on the sealing mount pad 10, avoids extraneous impurity etc. to enter in the annular groove 102, and influences the measuring accuracy of current sensor, has improved the usability of this current sensor.In addition, structure of cover plate is simple, is convenient to moulding, has improved the efficiency of assembling of current sensor, and has reduced the moulding cost of current sensor.
Further, this bridge welding is connected on the mount pad 10.Thus, make cover plate and mount pad 10 easy for installation, improved the efficiency of assembling of current sensor, and improved the sealing effectiveness of current sensor further, make the testing result of current sensor more accurate.
Further, can in the annular groove 102 by cover plate for sealing, sealing be set, not only can improve the closed performance of current sensor, and the effect of compressing of sealing can also improve the stability of current sensor, improve the stability of current sensor further.
In addition, this sealing is full of annular groove 102.In the assembling process of current sensor, in the sealing injection ring connected in star 102 with liquid state, and make liquid sealing be full of annular groove 102, after the sealing perfusion is finished, through predetermined time, sealing is frozen into solid-state in annular groove 102, and compresses circuit board 30 and toroidal core 20, with circuit board 30 and toroidal core 20 stable being limited in the annular groove 102.Thus, not only can the sealing current sensor, and in the use of current sensor, because sealing compresses circuit board 30 and toroidal core 20, make the stable location of toroidal core 20, avoid the situation of the current sensor job insecurity that causes because of vibrations, improved accuracy of detection and the scope of application of this current sensor, the serviceable life of having improved current sensor.
In addition, as described in Figure 1, in an embodiment of the present utility model, mount pad 10 is that rectangular shape and central through hole 101 are rectangular opening.Thus, make the simple in structure of mount pad 10, be convenient to moulding and the assembling of mount pad 10, improved the production efficiency of current sensor.In addition, the mount pad 10 of rectangular shape can also be convenient to the transportation of current sensor.
Further, in embodiment more of the present utility model, this current sensor also comprises the coil (not shown), and this coil encircling is on toroidal core 20.Thus, the current sensor of closed loop has increased the accuracy of detection of current sensor further.
As shown in Figure 4 and Figure 5, in embodiment more of the present utility model, the overriding resistance 31 of laser comprises the overriding resistance R 4 of first laser, the overriding resistance R 5 of second laser and the overriding resistance R 6 of the 3rd laser, and testing circuit comprises first testing circuit that detects the overriding resistance R 4 of described first laser and the overriding resistance R 5 of second laser and for detection of second testing circuit of the overriding resistance R 6 of the 3rd laser.Thus, at circuit board 30 the overriding resistance of a plurality of laser is set, can regulates to improve the precision of current sensor to the overriding resistance of a plurality of laser.In addition, the overriding resistance of a plurality of laser all is enclosed in the annular groove 102, avoids current sensor to be interfered, and has improved precision and the practicality of this current sensor further.
Because traditional current sensor adopts potentiometer to carry out the adjusting of circuit, in the production run of traditional current sensor, adopts following production run: PCB circuit board processed; Pcb board SMT paster; Plug-in unit encapsulation components and parts on the artificial soldered circuit board; The test pcb board; Magnetic core is handled; Assembling pcb board, magnetic core, shell; Sealant pouring and sealing; The output of adjusting sensor zero point; Regulate the sensor output gain; Testing sensor.But adopt the adjusting resistance of this method need be exposed in the air, influenced the accuracy of detection of current sensor.
Therefore, the utility model proposes a kind of control method of circuit board of current sensor, wherein, circuit board is provided with the overriding resistance of laser and is used for regulating the testing circuit of the overriding resistance of laser.
The control method of the circuit board of current sensor of the present utility model may further comprise the steps:
Step 1: circuit board is positioned over for the adjusting platform of regulating the overriding resistance of laser;
Step 2: the mobile platform of regulating makes the overriding resistance of laser be positioned at the precalculated position;
Step 3: adopt laser beam to regulate the overriding resistance of laser and the output signal of checking testing circuit to judge according to the output signal of testing circuit whether needs continue adjusting to the overriding resistance of laser;
Step 4: if the prearranged signals that the overriding resistance adjustment of testing circuit output laser is finished stops to regulate.
After regulating and finish, circuit board 30 carries out the assembling of current sensor again.In the assembling process of current sensor, circuit board 30 is enclosed in the mount pad 10, improves the stability of the current sensor of knowing clearly.
In concrete example of the present utility model, testing circuit comprises first testing circuit and the second electrical measurement circuit.Fig. 4 shows first testing circuit of an embodiment of the present utility model.With reference to Fig. 4, first testing circuit comprises positive power source terminal V+, negative power end V-and output end vo ut0, first resistance R, 1, the second resistance R 2.Wherein, one end of first resistance R 1 links to each other with positive power source terminal V+, the other end of first resistance R 1 links to each other with first end of the overriding resistance R 4 of first laser, one end of second resistance R 2 links to each other with negative power end V-, the other end of second resistance R 2 links to each other with first end of the overriding resistance R 5 of second laser, and second end of second end of the overriding resistance R 4 of first laser and the overriding resistance R 5 of second laser links to each other with output end vo ut0 respectively.Particularly, comprise the steps:
1) respectively to positive power source terminal V+ and negative power end V-input voltage, the input voltage absolute value of positive power source terminal V+ and negative power end V-equates that phase place is opposite.
2) check output end vo ut0, if output end vo ut0 magnitude of voltage is not equal to 0, regulate resistance R 1 or resistance R 2, if output voltage V out0 equals 0, then stop to regulate.
In addition, first testing circuit comprises that also this first operational amplifier links to each other with output end vo ut0 for the first operational amplifier (not shown) of the output signal of amplifying output end vo ut0.Thus, the voltage of output end vo ut0 can be amplified, according to the magnitude of voltage after amplifying resistance R 1, R2 are regulated then, so that improve the precision of adjusting.
Fig. 5 is second testing circuit of an embodiment of the present utility model, and with reference to Fig. 5, second testing circuit comprises the 3rd resistance R 3, Hall element H1, the second operational amplifier U1 and power end V1.Wherein, one end of the 3rd resistance R 3 links to each other with the first input end of the second operational amplifier U1, the other end ground connection of the 3rd resistance R 3, the end of Hall element H1 links to each other with the output terminal of the second operational amplifier U1, the other end of Hall element H1 is connected between the first input end of the 3rd resistance R 3 and the second operational amplifier U1, one end of the overriding resistance R 6 of the 3rd laser links to each other with second input end of the second operational amplifier U1, the other end ground connection of the overriding resistance R 6 of the 3rd laser, power end V1 is connected between second input end of the overriding resistance R 6 of the 3rd laser and the second operational amplifier U1.Wherein, the magnitude of voltage of power end V1 changes with the variation of the resistance of the overriding resistance R 6 of the 3rd laser.
Should be in second testing circuit, the resistance of regulating the overriding resistance R 6 of the 3rd laser can change the input voltage V1 of second input end of the second operational amplifier U1.According to the principle of work of arithmetical unit, the voltage V2=V1 of the first input end of the second operational amplifier U1.The supply current I1=V2/R3=V1/R3 of Hall element H1, the output voltage V outh1=J*B*I1=J*B*V1/R3 of Hall element H1 then, wherein J, B are constant.The output voltage V out=I*Vouth1=I*J*B*V1/R3 of this current sensor, wherein I is constant, so the output voltage of sensor is only relevant with the 3rd resistance R 3 resistances with the magnitude of voltage of power end V1, wherein the R3 resistance is definite value.Change the magnitude of voltage of input end V1, can change the sensor output voltage value, reach and repair the accent effect.Thus, by regulating the magnitude of voltage that the overriding resistance R 6 of the 3rd laser changes power end V1, to change the output voltage of sensor, repair the overriding resistance R 6 of accent the 3rd laser according to the output valve of current sensor.
To shown in Figure 6, the control method according to the circuit board of the utility model above-described embodiment may further comprise the steps as Fig. 4:
1) product is positioned over repaiies on the leveling platform;
2) position of adjusting laser beam makes laser beam foucing concentrate on the overriding resistive surface of laser;
3) regulate the laser beam coordinate, make laser beam to aim at and wait to repair the overriding resistance of laser of accent so that cut;
4) regulate the overriding resistance R 4 of first laser and the overriding resistance R 5 of second laser according to first testing circuit shown in Fig. 4;
5) monitoring output Vout0 output voltage, when output end vo ut0 output voltage reached predetermined value, equipment stopped the accent of repairing to the overriding resistance R 4 of first laser and the overriding resistance R 5 of second laser automatically.
6) regulate the overriding resistance R 6 of the 3rd laser according to second testing circuit shown in Fig. 5;
7) monitoring current sensor output voltage value, when output voltage values reached predetermined value, equipment stopped to repair accent automatically.
8) turn-off current is finished and is repaiied accent.
Since the overriding resistance of laser of the present utility model repair transfer finish after, be enclosed in the annular groove of mount pad, the overriding resistance of laser does not contact external environment, is more suitable for using in working environments such as vibration, high humidity.Adopt online monitoring current sensor parameters, can be at any time according to the variation of parameter, regulating circuit.Accent equipment is repaiied in robotization can replace manually-operated, repaiies accent by the software program controlling resistance.The more present current sensor of online laser resistor trimming formula current sensor has improved product reliability, has increased production efficiency.
Fig. 7 illustrates the operation interface synoptic diagram of the regulating device of the overriding resistance of laser of the present utility model, and the use of this device comprises the steps.
1) insert product type in the text box (1), system disposes model corresponding equipment parameter therewith automatically;
2) insert numeral in text box (2), (3), (4), (5), the coordinate figure of expression laser beam has only two directions, X and Y-direction;
3) text box (6), (7), (9), (10) show theoretical output and the actual output of current sensor;
4) text box (8), (11) display error, error are the poor of theoretical output and actual output, and whether equipment can stop to repair accent by error judgment, and Rule of judgment is, when error during less than preset value, stop to repair accent;
5) press the button (12), equipment can be exported by automatic testing product zero point, judges that be positive number or negative zero point, far selects automatically then and repaiies accent resistance;
6) press the button (13), equipment can be repaiied accent resistance automatically, after error amount is less than preset value, stops to repair accent;
7) press the button (14), equipment can be repaiied accent resistance automatically, after error amount is less than preset value, stops to repair accent;
8) press the button (15), equipment can automatically be gathered product output data, and result of calculation, judges whether qualified requirement of product.
Wherein, button (12) is that zero test, button (13) are for repairing accent, button (14) zero point for accent is repaiied in gain, button (14) is the output test.Wherein, whether described zero test is 0 for the output valve of the output end vo ut0 of detection first testing circuit, repaiies described zero point to be adjusted to according to first testing circuit and repaiies accent, and described gain is repaiied to be adjusted to according to second testing circuit and repaiied accent.
In the description of this instructions, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art in scope of the present utility model, can change above-described embodiment under the situation that does not break away from principle of the present utility model and aim, modification, replacement and modification.
Claims (10)
1. a current sensor is characterized in that, comprising:
The surface that mount pad, described mount pad have central through hole and a described mount pad is formed with the annular groove around described central through hole;
Toroidal core with opening, described toroidal core are located in the described annular groove and around described central through hole;
Circuit board, described circuit board are located in the described annular groove, and described circuit board has the overriding resistance of laser and is used for regulating the testing circuit of the overriding resistance of laser; With
Closure member, described closure member are located on the described mount pad and cover described toroidal core and described circuit board.
2. current sensor according to claim 1 is characterized in that, described closure member is to have the through hole that cooperates with described central through hole on cover plate and the described cover plate.
3. current sensor according to claim 2 is characterized in that, described bridge welding is connected on the described mount pad.
4. current sensor according to claim 2 is characterized in that, is provided with sealing in the described annular groove and described sealing is full of described annular groove.
5. current sensor according to claim 1 is characterized in that, described mount pad is that rectangular shape and described central through hole are rectangular opening.
6. current sensor according to claim 1 is characterized in that, also comprises coil, and described coil encircling is on described toroidal core.
7. current sensor according to claim 1, it is characterized in that, the overriding resistance of described laser comprises the overriding resistance of first to the 3rd laser, and described testing circuit comprises for detection of first testing circuit of the overriding resistance of described first and second laser with for detection of second testing circuit of the overriding resistance of described the 3rd laser.
8. current sensor according to claim 7, it is characterized in that, described first testing circuit comprises: positive power source terminal, negative power end and output terminal, first resistance, second resistance, wherein, one end of described first resistance links to each other with described positive power source terminal and the other end links to each other with first end of the overriding resistance of described first laser, one end of described second resistance links to each other with described negative power end and the other end links to each other with first end of the overriding resistance of described second laser, and second end of the overriding resistance of described first laser links to each other with described output terminal respectively with second end of the overriding resistance of described second laser.
9. current sensor according to claim 8 is characterized in that, described first testing circuit comprises that also described first operational amplifier links to each other with described output terminal for first operational amplifier of the output signal of amplifying described output terminal.
10. current sensor according to claim 7, it is characterized in that, described second testing circuit comprises the 3rd resistance, Hall element, second operational amplifier and power end, wherein, one end of described the 3rd resistance links to each other and other end ground connection with the first input end of described second operational amplifier, one end of described Hall element links to each other with the output terminal of described second operational amplifier and the other end is connected between the first input end of described the 3rd resistance and described second operational amplifier, one end of the overriding resistance of described the 3rd laser links to each other and other end ground connection with second input end of described second operational amplifier, and described power end is connected between second input end of the overriding resistance of described the 3rd laser and described second operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020572 CN203117257U (en) | 2013-01-15 | 2013-01-15 | Current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020572 CN203117257U (en) | 2013-01-15 | 2013-01-15 | Current sensor |
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| Publication Number | Publication Date |
|---|---|
| CN203117257U true CN203117257U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320020572 Expired - Lifetime CN203117257U (en) | 2013-01-15 | 2013-01-15 | Current sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146573A (en) * | 2019-05-30 | 2019-08-20 | 莱鼎电子材料科技有限公司 | The laser resistor trimming scaling method of wide area formula lambda sensor |
| CN110865222A (en) * | 2018-08-28 | 2020-03-06 | 比亚迪股份有限公司 | Current sensor |
-
2013
- 2013-01-15 CN CN 201320020572 patent/CN203117257U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865222A (en) * | 2018-08-28 | 2020-03-06 | 比亚迪股份有限公司 | Current sensor |
| CN110146573A (en) * | 2019-05-30 | 2019-08-20 | 莱鼎电子材料科技有限公司 | The laser resistor trimming scaling method of wide area formula lambda sensor |
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Effective date of registration: 20191227 Address after: 518119 1 Yanan Road, Kwai Chung street, Dapeng New District, Shenzhen, Guangdong Patentee after: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address before: BYD 518118 Shenzhen Road, Guangdong province Pingshan New District No. 3009 Patentee before: BYD Co.,Ltd. |
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Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: BYD Semiconductor Co.,Ltd. Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. |
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Granted publication date: 20130807 |