CN205450239U - Magnetic sensor revises device - Google Patents
Magnetic sensor revises device Download PDFInfo
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- CN205450239U CN205450239U CN201521133744.7U CN201521133744U CN205450239U CN 205450239 U CN205450239 U CN 205450239U CN 201521133744 U CN201521133744 U CN 201521133744U CN 205450239 U CN205450239 U CN 205450239U
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Abstract
The utility model discloses a magnetic sensor revises device. Wherein, the device includes: magnetic sensor, including difference amplifying unit and effluvium subarray, including n effluvium, the difference amplifying unit is used for generating output voltage according to received apply signal voltage in the effluvium subarray, wherein, among the output voltage in n effluvium the corresponding output voltage of every effluvium, the unit is reviseed to voltage, is connected with magnetic sensor for calculate according to the output voltage that corresponds with the sub - ci of effluvium and revise voltage with the sub - ci of effluvium corresponds, the controller is reviseed the unit with magnetic sensor and voltage respectively and is connected for the voltage signal who revises voltage who corresponds every effluvium inputs to the difference amplifying unit. The utility model provides a magnetic sensor in the correlation technique under the circumstances of undetected thing since the output signal of a plurality of effluviums not the homogeneous lead to the fact the technical problem who reduces magnetic sensor and detect the precision.
Description
Technical field
This utility model relates to Magnetic testi field, in particular to a kind of Magnetic Sensor compensating device.
Background technology
In paper money discrimination field, paper money counter, cash inspecting machine, cleaning-sorting machine etc. can carry out the identification note true and false by magnetic signal is carried out detection.At present, the Magnetic Sensor that existing precision is higher is usually 18 passages, is i.e. provided with 18 effluvium in 180 millimeters of sweep lengths, and average 1 effluvium covers the detection range of about 10 millimeters.When in the range of these 10 millimeters, any one has magnetic signal, this effluvium just has output, namely the accuracy of detection of Magnetic Sensor is 10 millimeters.The corresponding a set of signal processing circuit of each passage in 18 passages of Magnetic Sensor, i.e. this 18 passage parallel detection simultaneously.For improving the accuracy of detection of magnetic signal, prior art have developed the Magnetic Sensor that accuracy of detection is 0.5 millimeter, i.e. 180 millimeters corresponding 360 effluvium of sweep length.This Magnetic Sensor uses serial mode output signal, due to the discreteness between effluvium, or the impact that the factor such as surrounding causes, in the case of there is no detectable substance, the heterogeneity that the output signal of 360 effluvium of Magnetic Sensor also can become, seriously reduces the accuracy of detection of Magnetic Sensor.
In the case of there is no detectable substance, cause the problem of reduction Magnetic Sensor accuracy of detection due to the output signal heterogeneity of multiple effluviums for the Magnetic Sensor in correlation technique, the most not yet propose effective solution.
Utility model content
This utility model embodiment provides a kind of Magnetic Sensor compensating device, reduces the technical problem of Magnetic Sensor accuracy of detection owing to the output signal heterogeneity of multiple effluviums causes at least solving Magnetic Sensor in correlation technique in the case of not having detectable substance.
An aspect according to this utility model embodiment, provide a kind of Magnetic Sensor compensating device, including: Magnetic Sensor, including differential amplification unit and effluvium subarray, effluvium subarray includes n effluvium, and differential amplification unit is for generating output voltage signal according to the input voltage signal received, wherein, output voltage signal includes the output voltage that in n effluvium, each effluvium is corresponding, and n is the natural number of more than 2；Voltage correcting unit, it is connected with Magnetic Sensor, for calculating Ci corresponding correction voltage with effluvium according to output voltage corresponding for Ci with effluvium, wherein, under Magnetic Sensor is in sky scanning mode, and being connected under state with differential amplification unit at the sub-Ci of effluvium, the output voltage of Magnetic Sensor is Ci corresponding output voltage with effluvium, i takes 1 to n successively, and n effluvium attached bag includes the sub-C1 of effluvium to the sub-Cn of effluvium；And controller, it is connected with Magnetic Sensor and voltage correcting unit respectively, for the voltage signal of correction voltage corresponding for each effluvium is inputted to differential amplification unit.
Further, this device also includes: AD conversion unit, and one end is connected with Magnetic Sensor, and the other end is connected with voltage correcting unit, for sampling output voltage signal, obtains the output voltage that each effluvium is corresponding；D/A conversion unit, one end is connected with controller, and the other end is connected with Magnetic Sensor, for correction voltage corresponding for each effluvium is simulated conversion, obtains the voltage signal of correction voltage corresponding to each effluvium.
Further, this device also includes: memorizer, and one end is connected with voltage correcting unit, and the other end is connected with controller, for storing the correction voltage that each effluvium is corresponding, and sends correction voltage corresponding for each effluvium to controller.
Further, this device also includes: memorizer, one end is connected with AD conversion unit, the other end is connected with controller, for storing the output voltage that each effluvium is corresponding, and output voltage corresponding for each effluvium is sent to controller, wherein, voltage correcting unit one end is connected with Magnetic Sensor, and the other end is connected with D/A conversion unit.
Further, this device also includes: Temperature and Humidity unit, for detecting the temperature and humidity of Magnetic Sensor place environment, wherein, memorizer, it is connected with Temperature and Humidity unit, for being stored in the output voltage or correction voltage that under the temperature and humidity that Temperature and Humidity unit detects, each effluvium is corresponding.
Further, Magnetic Sensor also includes: effluvium subarray shares resistance, one end ground connection, and the other end is connected with effluvium subarray by shift switching unit；And shift switching unit, it being connected with effluvium subarray, shift switching unit includes n switch, and wherein, each effluvium shares resistant series by a switch with effluvium subarray.
Further, Magnetic Sensor also includes: divider resistance unit, for producing the benchmark voltage signal of differential amplification unit, wherein, the input of the differential amplification unit other end with divider resistance unit and the public resistance of effluvium subarray respectively is connected, and the outfan of differential amplification unit is connected with the input of voltage correcting unit.
Further, differential amplification unit includes amplifier, amplifier has two input voltage ports and bias voltage port, wherein, two input voltage ports of amplifier are respectively connected to input voltage signal and reference voltage signal, the bias voltage port of amplifier accesses the voltage signal of correction voltage corresponding to each effluvium, or one of them input voltage port of amplifier accesses input voltage signal, another input voltage port accesses the voltage signal of correction voltage corresponding to each effluvium, and the bias voltage port of amplifier accesses predeterminated voltage signal.
nullFurther，Differential amplification unit includes at least two amplifier，Each amplifier has two input voltage ports and bias voltage port，Wherein，One of them input voltage port of first amplifier and the second amplifier accesses benchmark voltage signal，Wherein，At least two amplifier includes the first amplifier and the second amplifier，Another input voltage port of first amplifier accesses input voltage signal，The bias voltage port of the first amplifier accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to the first amplifier is corresponding，Another access voltage port of second amplifier inputs the output signal of the first amplifier，The bias voltage port of the second amplifier accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to the second amplifier is corresponding.
Further, differential amplification unit includes at least two amplifier, each amplifier has two input voltage ports and bias voltage port, wherein, the bias voltage port of the first amplifier and the second amplifier accesses predeterminated voltage signal, wherein, at least two amplifier includes the first amplifier and the second amplifier, one input voltage port of the first amplifier accesses input voltage signal, another input voltage port accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to the first amplifier is corresponding, one input voltage port of the second amplifier accesses the output signal of the first amplifier, another input voltage port accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to the second amplifier is corresponding.
In this utility model embodiment, Magnetic Sensor compensating device includes: Magnetic Sensor, including differential amplification unit and effluvium subarray, effluvium subarray includes n effluvium, differential amplification unit is for generating output voltage signal according to the input voltage signal received, wherein, output voltage signal includes the output voltage that in n effluvium, each effluvium is corresponding, and n is the natural number of more than 2；Voltage correcting unit, it is connected with Magnetic Sensor, for calculating Ci corresponding correction voltage with effluvium according to output voltage corresponding for Ci with effluvium, wherein, under Magnetic Sensor is in sky scanning mode, and being connected under state with differential amplification unit at the sub-Ci of effluvium, the output voltage of Magnetic Sensor is Ci corresponding output voltage with effluvium, i takes 1 to n successively, and n effluvium attached bag includes the sub-C1 of effluvium to the sub-Cn of effluvium；And controller, it is connected with Magnetic Sensor and voltage correcting unit respectively, for the voltage signal of correction voltage corresponding for each effluvium is inputted to differential amplification unit, by carrying out obtaining when sky is swept, at Magnetic Sensor, the correction voltage that each effluvium is corresponding, utilize the correction voltage that each effluvium is corresponding that Magnetic Sensor is maked corrections when Magnetic Sensor actual scanning object, reach to ensure the purpose of Magnetic Sensor accuracy of detection, it is achieved thereby that improve the technique effect of Magnetic Sensor accuracy of detection, and then solve the Magnetic Sensor in correlation technique in the case of there is no detectable substance owing to the output signal heterogeneity of multiple effluviums causes the technical problem of reduction Magnetic Sensor accuracy of detection.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes the part of the application, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram of the Magnetic Sensor compensating device according to this utility model embodiment；
Fig. 2 is the structural representation of a kind of optional Magnetic Sensor according to this utility model embodiment；
Fig. 3 is the structural representation of the another kind of optional Magnetic Sensor according to this utility model embodiment；
Fig. 4 is the structural representation of another the optional Magnetic Sensor according to this utility model embodiment；
Fig. 5 is the structural representation of another the optional Magnetic Sensor according to this utility model embodiment；
Fig. 6 is the schematic diagram of a kind of optional Magnetic Sensor compensating device according to this utility model embodiment；
Fig. 7 is the schematic diagram of the another kind of optional Magnetic Sensor compensating device according to this utility model embodiment；
Output voltage waveform when Fig. 8 a is the offset side correction difference amplifier sky scanning according to this utility model embodiment；
Fig. 8 b is the offset side correction difference amplifier correction voltage oscillogram according to this utility model embodiment；
Output voltage waveform when Fig. 8 c is offset side correction difference amplifier sky scanning after the correction according to this utility model embodiment；
Output voltage waveform when Fig. 9 a is the input correction difference amplifier sky scanning according to this utility model embodiment；
Fig. 9 b is the input correction difference amplifier correction voltage oscillogram according to this utility model embodiment；And
Output voltage waveform when Fig. 9 c is input correction difference amplifier sky scanning after the correction according to this utility model embodiment.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that this utility model scheme, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of this utility model part rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of this utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing, " second " etc. are for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to embodiment of the present utility model described herein can be implemented with the order in addition to those here illustrating or describing.In addition, term " includes " and " having " and their any deformation, it is intended to cover non-exclusive comprising, such as, contain those unit that the process of a series of unit, system, product or equipment are not necessarily limited to clearly list, but can include the most clearly listing or for intrinsic other unit of these processes, product or equipment.
According to this utility model embodiment, it is provided that the embodiment of a kind of Magnetic Sensor compensating device, it should be noted that this device goes for the Magnetic Sensor of any kind or model, utilize this device can realize improving the purpose of Magnetic Sensor accuracy of detection.
Fig. 1 is the schematic diagram of the Magnetic Sensor compensating device according to this utility model embodiment, as it is shown in figure 1, this device may include that
Magnetic Sensor 10, voltage correcting unit 20 and controller 30, wherein, Magnetic Sensor 10 is for generating output voltage signal according to input voltage signal, and output voltage signal includes the output voltage that in Magnetic Sensor 10, each effluvium is corresponding, voltage correcting unit 20 is connected with Magnetic Sensor 10, the correction voltage that each effluvium is corresponding is calculated for the output voltage corresponding according to each effluvium, controller 30 is connected with voltage correcting unit 20, for utilize each effluvium corresponding correction voltage voltage signal Magnetic Sensor is maked corrections.The inspection precision of Magnetic Sensor can be improved by the Magnetic Sensor compensating device in this utility model embodiment, separately below the various piece in this Magnetic Sensor compensating device is described in detail, specifically respectively:
This utility model embodiment not kind and model to Magnetic Sensor 10 is construed as limiting, any one during the structure of Magnetic Sensor 10 can be following several structure in this embodiment:
Fig. 2 is the structural representation of a kind of optional Magnetic Sensor according to this utility model embodiment, as shown in Figure 2, Magnetic Sensor 10 may include that effluvium subarray 11, shift switching unit 12, differential amplification unit 13, divider resistance unit 14 and effluvium subarray share resistance R1, wherein, can include n effluvium in effluvium subarray 11, n is the natural number of more than 2, and n effluvium is in parallel.Shift switching unit 12 is connected with effluvium subarray 11, shift switching unit 12 can including, n is to switch, the number number sub-with effluvium of switch is identical, each effluvium shares resistance R1 by a switch with effluvium subarray and connects, shift switching unit 12 is by the control of switch, successively effluvium is connected, effluvium and the effluvium subarray connected shares resistance R1 and carries out dividing potential drop generation voltage signal, this voltage signal can carry out differential amplification process by input difference amplifying unit 13 together with the benchmark voltage signal that divider resistance unit 14 produces, differential amplification unit 13 exports magnetic signal.Effluvium subarray shares resistance R1 one end ground connection, and the other end is connected with effluvium subarray by shift switching unit.nullDifferential amplification unit 13 can include amplifier，This amplifier can be with bias voltage function，There are two input voltage ports、One bias voltage port B and an output port，Two input ports share the other end of resistance R1 respectively with effluvium subarray and divider resistance unit 14 is connected，For being respectively connected to input voltage signal and reference voltage signal，Wherein，Input voltage signal refers to the voltage signal obtained after effluvium subarray shares resistance R1 dividing potential drop，The output port of amplifier is connected with the input of voltage correcting unit 20，The bias voltage port of amplifier is connected with the outfan of voltage correcting unit 20，For accessing the voltage signal of correction voltage corresponding to calculated each effluvium of voltage correcting unit 20，Differential amplification unit 13 may be used for generating output voltage signal Vx according to the input voltage signal received，Wherein，Output voltage signal Vx includes the output voltage that in n effluvium, each effluvium is corresponding.Divider resistance unit 14 can include divider resistance R2 and R3, divider resistance R2 and R3 connects, divider resistance unit 14 may be used for producing the benchmark voltage signal of differential amplification unit 13, one input voltage port of differential amplification unit 13 is connected with the junction point of divider resistance R2 and R3, it should be noted that one of them resistance in divider resistance R2 and R3 can be replaced by an effluvium filial generation.
Fig. 3 is the structural representation of the another kind of optional Magnetic Sensor according to this utility model embodiment, as shown in Figure 3, Magnetic Sensor 10 shown in Fig. 3 is with the difference of the Magnetic Sensor 10 shown in Fig. 2: the Magnetic Sensor shown in Fig. 3 does not include divider resistance unit 14, and the bias voltage port of amplifier is used for accessing predeterminated voltage signal in differential amplification unit 13, such as fixed voltage value is the voltage signal of U/2, one of them input voltage port of amplifier is connected with the outfan of voltage correcting unit 20, for accessing the voltage signal of correction voltage corresponding to calculated each effluvium of voltage correcting unit 20.
Alternatively, can include one or more amplifier in the differential amplification unit 13 in this embodiment, this utility model embodiment includes illustrating as a example by two amplifiers by differential amplification unit 13.nullFig. 4 is the structural representation of another the optional Magnetic Sensor according to this utility model embodiment，As shown in Figure 4，Magnetic Sensor 10 shown in Fig. 4 is with the difference of the Magnetic Sensor 10 shown in Fig. 1: differential amplification unit 13 includes two amplifiers，It is respectively the first amplifier and the second amplifier，First amplifier and the second amplifier are respectively provided with two input voltage ports and a bias voltage port，Wherein，One of them input voltage port of first amplifier and the second amplifier is connected with divider resistance unit 14，For accessing benchmark voltage signal，The other end that another input voltage port of first amplifier shares resistance R1 with effluvium subarray is connected，For accessing input voltage signal，The bias voltage port B1 of the first amplifier is connected with the outfan of voltage correcting unit 20，For accessing the voltage signal that correction voltage corresponding to calculated each effluvium of output signal V1x according to the first amplifier is corresponding.Another access voltage port of second amplifier is connected with the output port of the first amplifier, for inputting output signal V1x of the first amplifier, the bias voltage port B2 of the second amplifier is connected with the outfan of voltage correcting unit 20, for accessing the voltage signal that correction voltage corresponding to calculated each effluvium of output signal V2x according to the second amplifier is corresponding.
nullFig. 5 is the structural representation of another the optional Magnetic Sensor according to this utility model embodiment，As shown in Figure 5，Magnetic Sensor 10 shown in Fig. 5 is with the difference of the Magnetic Sensor 10 shown in Fig. 3: differential amplification unit 13 includes two amplifiers，It is respectively the first amplifier and the second amplifier，First amplifier and the second amplifier are respectively provided with two input voltage ports and bias voltage port，Wherein，The bias voltage port of the first amplifier and the second amplifier all accesses predeterminated voltage signal，Such as magnitude of voltage is the voltage signal of U/2，The other end that one input voltage port of the first amplifier shares resistance R1 with effluvium subarray is connected，For accessing input voltage signal，Another input voltage port A1 is connected with the outfan of voltage correcting unit 20，For accessing the voltage signal that correction voltage corresponding to calculated each effluvium of output signal V1x according to the first amplifier is corresponding，One input voltage port of the second amplifier and the output port of the first amplifier are connected，For accessing the output signal of the first amplifier，Another input voltage port A2 is connected with the outfan of voltage correcting unit 20，For accessing the voltage signal that correction voltage corresponding to calculated each effluvium of output signal V2x according to the second amplifier is corresponding.
Voltage correcting unit 20, it is connected with Magnetic Sensor 10, for calculating Ci corresponding correction voltage with effluvium according to output voltage corresponding for Ci with effluvium, wherein, under Magnetic Sensor 10 is in sky scanning mode, and being connected under state with differential amplification unit 13 at the sub-Ci of effluvium, the output voltage of Magnetic Sensor 10 is Ci corresponding output voltage with effluvium, i takes 1 to n successively, and n effluvium attached bag includes the sub-C1 of effluvium to the sub-Cn of effluvium.
Controller 30, is connected with Magnetic Sensor 10 and voltage correcting unit 20 respectively, for inputting the voltage signal of correction voltage corresponding for each effluvium to differential amplification unit 13.
The outfan of Magnetic Sensor 10 is connected with the input of voltage correcting unit 20, Magnetic Sensor 10 is when sky scans, the output voltage signal that voltage correcting unit 20 utilizes Magnetic Sensor 10 to export can calculate the correction voltage that each effluvium is corresponding, controller 30 can control Magnetic Sensor 10 utilize when actual scanning object each effluvium corresponding correction voltage voltage signal Magnetic Sensor 10 is maked corrections, with realize improve Magnetic Sensor 10 accuracy of detection purpose.This utility model embodiment will be in conjunction with following two optional embodiment to voltage correcting unit 20 and being discussed in detail of controller 30.
As a kind of optional embodiment, Fig. 6 is the schematic diagram of a kind of optional Magnetic Sensor compensating device according to this utility model embodiment, as shown in Figure 6, this device may include that Magnetic Sensor 10, data processing unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), controller 30, AD conversion unit 40, D/A conversion unit 50 and memorizer 60, wherein, AD conversion unit 40 one end is connected with Magnetic Sensor 10, the other end is connected with data processing unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), output voltage signal for exporting Magnetic Sensor 10 is sampled, obtain the output voltage that each effluvium is corresponding.Data processing unit 20 calculates, according to the output voltage that each effluvium is corresponding, the correction voltage that each effluvium is corresponding.Memorizer 60 one end is connected with data processing unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), the other end is connected with controller 30, for storing the correction voltage that calculated each effluvium of data processing unit 20 is corresponding, and when Magnetic Sensor 10 actual scanning object, correction voltage corresponding for each effluvium is sent to controller 30.D/A conversion unit 50 one end is connected with controller 30, the other end is connected with Magnetic Sensor 10, the correction voltage corresponding for each effluvium received by controller 30 is simulated conversion, obtain the voltage signal of correction voltage corresponding to each effluvium, and this voltage signal is fed back to Magnetic Sensor 10 carry out voltage correction.It should be noted that this embodiment middle controller 30 can be connected with each unit respectively, it is used for controlling each unit so that unit co-ordination.This controller 30 can be the microprocessors such as FPGA, ARM, DSP.
As an alternative embodiment, Fig. 7 is the schematic diagram of the another kind of optional Magnetic Sensor compensating device according to this utility model embodiment, as shown in Figure 7, this device may include that Magnetic Sensor 10, operation circuit unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), controller 30, AD conversion unit 40, D/A conversion unit 50 and memorizer 60, wherein, AD conversion unit 40 one end is connected with Magnetic Sensor 10, the other end is connected with operation circuit unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), output voltage signal for exporting Magnetic Sensor 10 is sampled, obtain the output voltage that each effluvium is corresponding.Memorizer 60 one end is connected with AD conversion unit 40, the other end is connected with controller 30, for storing the output voltage that each effluvium that AD conversion unit 40 obtains is corresponding, and when Magnetic Sensor 10 actual scanning object, output voltage corresponding for each effluvium is sent to controller 30.D/A conversion unit 50 one end is connected with controller 30, the other end is connected with operation circuit unit 20 (the namely voltage correcting unit 20 in this utility model embodiment), the output voltage corresponding for each effluvium received by controller 30 is simulated conversion, obtain the voltage signal of output voltage corresponding to each effluvium, and this voltage signal is fed back to operation circuit unit 20.Operation circuit unit 20 one end is connected with Magnetic Sensor 10, the other end is connected with D/A conversion unit 50, voltage signal for the output voltage corresponding according to each effluvium calculates the voltage signal of correction voltage corresponding to each effluvium, and this voltage signal feeds back to Magnetic Sensor 10 carries out voltage correction.It should be noted that this embodiment middle controller 30 can also be connected with each unit respectively, it is used for controlling each unit so that unit co-ordination.
It should be noted that, the simulation magnetic signal that Magnetic Sensor 10 is exported by the AD conversion unit 40 shown in Fig. 6 and Fig. 7 is converted to digital signal, AD conversion unit 40 can be serial analog-digital converter, it can also be parallel A/D converter, in AD conversion unit 40, the number of transducer can be one, it is also possible to is multiple.The digital signal that controller 30 is inputted by the D/A conversion unit 50 shown in Fig. 6 and Fig. 7 converts can be for analogue signal, D/A conversion unit 50 can be serial digital to analog converter, it can also be parallel digital to analog converter, in D/A conversion unit 50, the number of transducer can be one, it is also possible to is multiple.Data processing unit 20 shown in Fig. 6 and Fig. 7 and operation circuit unit 20 are the voltage correcting unit 20 in this utility model embodiment, the analogue signal that D/A conversion unit 50 is inputted by operation circuit unit 20 carries out voltage operational and produces final correction voltage and be supplied to Magnetic Sensor 10, alternatively, operation circuit unit 20 can be replaced by data processing unit, completes the voltage computing function that makes corrections.Wherein, data processing unit can be the microprocessors such as FPGA, ARM, DSP.Memorizer 60 shown in Fig. 6 with Fig. 7 stores correction voltage corresponding to each effluvium when Magnetic Sensor 10 is in sky scanning mode or output voltage corresponding to each effluvium, when Magnetic Sensor 10 scans object, extracted by controller 30, send into D/A conversion unit 50.
The operation principle of the Magnetic Sensor compensating device of above-mentioned this utility model embodiment be discussed in detail below in conjunction with embodiment 1 to embodiment 8:
Embodiment 1: in Magnetic Sensor compensating device as shown in Figure 6, as in figure 2 it is shown, wherein, the sub-close-packed arrays of multiple effluviums in effluvium subarray 11, the change of effluvium sensing external magnetic field, the resistance of self changes the circuit structure of Magnetic Sensor therewith.Shift switching unit 12 is made up of shift register and switch arrays, and each switch correspondence connects effluvium.R1 is that effluvium subarray shares resistance, shift switching unit control, and successively with an effluvium composition bleeder circuit in effluvium subarray, produces voltage.13 is the differential amplification unit with offset side B, and 14 is electric resistance partial pressure unit, produces comparison reference voltage.During Magnetic Sensor work, control unit controls shift switching unit, each effluvium in effluvium subarray is made to connect with R1 successively, the voltage that voltage between effluvium and R1 and electric resistance partial pressure unit 14 produce together is input to differential amplification unit and compares and enlarges, thus draws the amplification signal of a line all effluviums magnetoreceptive change of son.Herein for ease of narration, only illustrating with front 5 effluvium of Magnetic Sensor, tentative electric resistance partial pressure unit R 2, R3 resistance is equal, i.e. electric resistance partial pressure unit output voltage U/2.In tentative effluvium subarray, the initial resistance of each effluvium is substantially near R1.During the scanning of Magnetic Sensor sky (not detecting object), controller provides constant voltage U/2 to differential amplification unit offset side B, owing to the initial resistance resistance relative to R1 of each effluvium is slightly different, initial output voltage Vx (the x=1 of Magnetic Sensor, 2,3,4,5) fluctuating up and down at U/2, its voltage waveform is as shown in Figure 8 a.AD conversion unit sampling obtains each effluvium output voltage values Vx, and data processing unit calculates the correction voltage that each effluvium is corresponding, and i.e. differential amplification unit offset side reference voltage correction data Mx=U/2+ (U/2-Vx), is stored in memorizer.During Magnetic Sensor empty scanning again, controller arranges the voltage of differential amplification unit offset side B while controlling to connect each effluvium be the offset side reference voltage Mx that this effluvium is corresponding, i.e. controller takes out correction data successively from memorizer and is supplied to differential amplification unit offset side B by D/A conversion unit, and offset side B voltage waveform now is as shown in Figure 8 b.The final output waveform of Magnetic Sensor when so sky is swept after correction as shown in Figure 8 c, i.e. eliminates the deviation between each effluvium.
Embodiment 2, in Magnetic Sensor compensating device as shown in Figure 7, the circuit structure of Magnetic Sensor is as shown in Figure 2, it is different from embodiment 1, during the scanning of Magnetic Sensor sky, controller provides constant voltage U/2, the Vx (x=1 of now Magnetic Sensor output to differential amplification unit offset side B, 2,3,4,5), its voltage waveform as shown in Figure 8 a, is stored in memorizer after analog digital conversion.When again scanning, correction voltage corresponding for this effluvium is applied to offset side B while controlling to connect certain effluvium by controller, i.e. controller takes out the value of Vx corresponding to this effluvium from memorizer, it is sent to D/A conversion unit, by output after D/A conversion unit analog-converted to operation circuit unit.Operation circuit unit completes the calculating of correction voltage Mx=U/2+ (U/2-Vx), flows to the offset side B of differential amplification unit, and now the waveform of offset side B is as shown in Figure 8 b.The final output voltage waveforms of Magnetic Sensor when so sky scans after correction as shown in Figure 8 c, equally reaches to eliminate the deviation between each effluvium, obtains the effect of more accurate output.
Embodiment 3, in Magnetic Sensor compensating device as shown in Figure 6, as it is shown on figure 3, wherein, 13 is differential amplification unit to the circuit structure of Magnetic Sensor, and amplification is G, and its bias terminal voltage is fixed as U/2, and the voltage of input reference edge A is provided by D/A conversion unit.During empty scanning, the voltage of input reference edge A is fixed as U/2, the now output data Vx (x=1 of Magnetic Sensor, 2,3,4,5), its voltage waveform as illustrated in fig. 9, is calculated, by data processing unit, input correction reference voltage Mx=U/2+ (Vx-U/2)/G that each sub-prime is corresponding after analog digital conversion, and is stored in memorizer.When again scanning, input correction reference voltage corresponding for this effluvium is applied to input reference edge A while controlling to connect certain effluvium by controller, i.e. controller takes out the value of Mx successively from memorizer, it is sent to D/A conversion unit, at input reference edge A just voltage waveform as shown in figure 9b, the final output voltage waveforms of Magnetic Sensor when so sky is swept after correction as is shown in fig. 9 c, i.e. eliminates the deviation between each effluvium, obtains exporting the most accurately.
Embodiment 4, in Magnetic Sensor compensating device as shown in Figure 7, the circuit structure of Magnetic Sensor is as it is shown on figure 3, be different from embodiment 3, and data processing unit is replaced by operation circuit unit.During empty scanning, the voltage of input reference edge A is fixed as U/2, and now output data Vx (x=1,2,3,4,5) of Magnetic Sensor, its voltage waveform as illustrated in fig. 9, AD conversion unit is stored in memorizer after changing.When again scanning, controller inputs, at input reference edge A, the input reference edge correction voltage that this effluvium is corresponding while controlling to connect certain effluvium, i.e. controller takes out the value of Vx successively from memorizer, it is sent to D/A conversion unit, by output after D/A conversion unit analog-converted to operation circuit unit.Operation circuit unit is sequentially completed the calculating of correction voltage Mx=U/2+ (Vx-U/2)/G, flows to the input reference edge A of differential amplification unit, and now the waveform of input reference edge A is as shown in figure 9b.The final output voltage waveforms of Magnetic Sensor when so sky is swept after correction as is shown in fig. 9 c, equally eliminates the deviation between each effluvium, obtains exporting the most accurately.
Embodiment 5, in Magnetic Sensor compensating device as shown in Figure 6, the circuit structure of Magnetic Sensor as shown in Figure 4, wherein, has two digital to analog converters in D/A conversion unit, 13 is two-stage differential amplifying unit.During the most empty scanning, it is U/2 that controller arranges the voltage of two difference amplifiers offset side B1, B2.AD conversion unit sample successively first order difference amplifier output V1x (x=1,2,3,4,5), data processing unit calculates first order offset side reference voltage correction data M1x=U/2+ (U/2-V1x) that each effluvium is corresponding, is stored in memory element.During the empty scanning of second time, second level difference amplifier offset side B2 is fixed as U/2, while controller controls the connection of certain effluvium, first order offset side reference voltage compensating value M1x corresponding for this effluvium is exported first order difference amplifier offset side B1 through D/A conversion unit, the output V2x of data processing unit sampling second level amplifier, and calculate each effluvium correspondence second level offset side reference voltage correction data M2x=(U/2+ (U/2-V2x), and be stored in memory element.When again scanning, while controller controls the connection of certain effluvium, first order offset side reference voltage compensating value M1x corresponding for this effluvium is exported first order difference amplifier offset side B1 through D/A conversion unit, second level offset side reference voltage compensating value M2x corresponding for this effluvium is exported to second level difference amplifier offset side B2 through D/A conversion unit, this completes the correction of two-stage offset side, make output the most accurate.
Embodiment 6, in Magnetic Sensor compensating device as shown in Figure 7, the circuit structure of Magnetic Sensor as shown in Figure 4, is different from embodiment 5, and data processing unit is replaced by operation circuit unit, and operation circuit unit has two set voltage counting circuits.During the most empty scanning, it is U/2 that controller arranges the voltage of two difference amplifiers offset side B1, B2, controller sampling first order difference amplifier output V1x (x=1,2,3,4,5), is stored in memorizer after analog digital conversion.During the empty scanning of second time, arranging second level difference amplifier offset side B2 voltage is U/2, controller controls, while a certain effluvium is connected, first order offset side correction voltage corresponding for this effluvium is input to offset side B1, the V1x value that i.e. controller takes out this effluvium corresponding from memorizer is sent to D/A conversion unit, by output after D/A conversion unit analog-converted to operation circuit unit.Operation circuit unit completes the calculating of first order offset side correction voltage M1x=U/2+ (U/2-V1x) corresponding to this effluvium, and flows to the offset side B1 of first order difference amplifier.During the empty scanning of now sampling second time, the output V2x (x=1,2,3,4,5) of second level difference amplifier, is stored in amplifier after analog digital conversion.When again scanning, controller controls, while a certain effluvium is connected, first order correction voltage M1x corresponding for this effluvium is applied to offset side B1, second level correction voltage M2x corresponding for this effluvium is applied to offset side B2, V1x and the V2x value that i.e. controller takes out this effluvium corresponding from memorizer is sent to AD conversion unit, after being simulated by AD conversion unit, output is to operation circuit unit, operation circuit unit completes first order correction voltage M1x=U/2+ (U/2-V1x) and the calculating of second level correction voltage M2x=U/2+ (U/2-V2x) simultaneously, it is applied respectively to offset side B1 and B2, this completes the correction of two-stage offset side, make output the most accurate.
Embodiment 7, in Magnetic Sensor compensating device as shown in Figure 6, the circuit structure of Magnetic Sensor is as shown in Figure 5, wherein, D/A conversion unit has two digital to analog converters, and 13 is two-stage differential amplifying unit, and first order differential amplifier gain is G1, second level differential amplifier gain is G2, and two difference amplifier offset sides are all fixed as U/2.During the most empty scanning, input reference edge A1, A2 voltage is set and is U/2, AD conversion unit sampling first order difference amplifier output V1x (x=1,2,3,4,5), calculated first order input correction reference voltage M1x=U/2+ (V1x-U/2)/G1 by data processing unit after analog digital conversion, and be stored in memorizer.During the empty scanning of second time, arranging second level input reference voltage terminal is U/2, first order input correction reference voltage corresponding for this effluvium is applied to first order input reference edge A1 while controlling to connect certain effluvium by controller, i.e. controller takes out the value of M1x successively from memorizer, it is sent to D/A conversion unit, digital-to-analogue conversion is after-applied to reference edge A1, the now output V2x of sampling second level difference amplifier, second level input correction reference voltage M2x=U/2+ (V2x-U/2)/G2 is calculated by data processing unit after analog digital conversion, and it is stored in memorizer.When again scanning, while controller controls the connection of certain effluvium, first order input reference voltage compensating value M1x corresponding for this effluvium is exported first order differential amplifier inputs A1 through D/A conversion unit, second level input reference voltage compensating value M2x corresponding for this effluvium is exported to second level differential amplifier inputs A2 through D/A conversion unit, the most just obtain the output through the correction of two-stage input, make output the most accurate.
Embodiment 8, in Magnetic Sensor compensating device as shown in Figure 7, the circuit structure of Magnetic Sensor is as it is shown in figure 5, be different from embodiment 7, and data processing unit is replaced by operation circuit unit, and operation circuit unit has two set voltage counting circuits.During the most empty scanning, it is U/2 that controller arranges the voltage of two differential amplifier inputs A1, A2, controller sampling first order difference amplifier output V1x (x=1,2,3,4,5), is stored in memorizer after analog digital conversion.During the empty scanning of second time, arranging second level differential amplifier inputs A2 voltage is U/2, controller controls, while a certain effluvium is connected, first order input correction voltage corresponding for this effluvium is input to the first pole differential amplifier inputs A1, the V1x value that i.e. controller takes out this effluvium corresponding from memorizer is sent to D/A conversion unit, by output after D/A conversion unit analog-converted to operation circuit unit.Operation circuit unit completes the calculating of first order input correction voltage M1x=U/2+ (V1x-U/2)/G1 corresponding to this effluvium, and flows to the input A1 of first order difference amplifier.During the empty scanning of now sampling second time, the output V2x of second level difference amplifier, is stored in memorizer after analog digital conversion.When again scanning, controller controls, while a certain effluvium is connected, first order input correction voltage corresponding for this effluvium is applied to first order differential amplifier inputs A1, second level input correction voltage corresponding for this effluvium is applied to offset side A2, V1x and the V2x value that i.e. controller takes out this effluvium corresponding from memorizer is sent to AD conversion unit, after being simulated by AD conversion unit, output is to operation circuit unit, operation circuit unit completes first order input correction voltage M1x=U/2+ (U/2-V1x) and the calculating of second level input correction voltage M2x=U/2+ (U/2-V2x) simultaneously, it is applied respectively to input A1 and A2, this completes the correction of two-stage input, make output the most accurate.
By the description of above-described embodiment, the Magnetic Sensor compensating device of this utility model embodiment can solve the Magnetic Sensor in correlation technique in the case of not having detectable substance owing to the output signal heterogeneity of multiple effluviums causes the technical problem of reduction Magnetic Sensor accuracy of detection, it is capable of eliminating the deviation between each effluvium, and then improves the Magnetic Sensor accurate effect of detection.
As a kind of optional embodiment, Magnetic Sensor compensating device in this utility model embodiment can also include: Temperature and Humidity unit, for detecting the temperature and humidity of Magnetic Sensor place environment, wherein, memorizer can be connected with Temperature and Humidity unit, for being stored in the output voltage or correction voltage that under the temperature and humidity that Temperature and Humidity unit detects, each effluvium is corresponding.Many set correction data that in this utility model embodiment memorizer, the different humiture of storage is corresponding, the humiture of surrounding is monitored in real time by the Temperature and Humidity unit when Magnetic Sensor works, use the correction data corresponding with current humiture that Magnetic Sensor is maked corrections, can reach to eliminate surrounding environment influence, and then improve the effect of Magnetic Sensor accuracy of detection.
By the Magnetic Sensor compensating device of this utility model embodiment, can be maked corrections Magnetic Sensor output bias signal completely, and then the Magnetic Sensor in solution correlation technique causes the technical problem of reduction Magnetic Sensor accuracy of detection due to the output signal heterogeneity of multiple effluviums in the case of not having detectable substance, realize eliminating the deviation between each effluvium, improve the Magnetic Sensor effect to the accuracy of detection of magnetisable material.
Above-mentioned this utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
In above-described embodiment of the present utility model, the description to each embodiment all emphasizes particularly on different fields, and does not has the part described in detail, may refer to the associated description of other embodiments in certain embodiment.In several embodiments provided herein, it should be understood that disclosed technology contents, can realize by another way.
The above is only preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (10)
1. a Magnetic Sensor compensating device, it is characterised in that including:
Magnetic Sensor, including differential amplification unit and effluvium subarray, described effluvium subarray includes n effluvium, described differential amplification unit is for generating output voltage signal according to the input voltage signal received, wherein, described output voltage signal includes the output voltage that in described n effluvium, each effluvium is corresponding, and n is the natural number of more than 2；
Voltage correcting unit, it is connected with described Magnetic Sensor, for calculating Ci corresponding correction voltage with described effluvium according to output voltage corresponding for Ci with effluvium, wherein, under described Magnetic Sensor is in sky scanning mode, and being connected under state with described differential amplification unit at the sub-Ci of described effluvium, the output voltage of described Magnetic Sensor is Ci corresponding output voltage with described effluvium, i takes 1 to n successively, and described n effluvium attached bag includes the sub-C1 of effluvium to the sub-Cn of effluvium；And
Controller, is connected with described Magnetic Sensor and described voltage correcting unit respectively, for by the voltage signal input extremely described differential amplification unit of correction voltage corresponding for described each effluvium.
Device the most according to claim 1, it is characterised in that described device also includes:
AD conversion unit, one end is connected with described Magnetic Sensor, and the other end is connected with described voltage correcting unit, for sampling described output voltage signal, obtains the output voltage that described each effluvium is corresponding；
D/A conversion unit, one end is connected with described controller, and the other end is connected with described Magnetic Sensor, for correction voltage corresponding for described each effluvium is simulated conversion, obtains the voltage signal of correction voltage corresponding to described each effluvium.
Device the most according to claim 2, it is characterised in that described device also includes:
Memorizer, one end is connected with described voltage correcting unit, and the other end is connected with described controller, for storing the correction voltage that described each effluvium is corresponding, and sends correction voltage corresponding for described each effluvium to described controller.
Device the most according to claim 2, it is characterised in that described device also includes:
Memorizer, one end is connected with described AD conversion unit, the other end is connected with described controller, for storing the output voltage that described each effluvium is corresponding, and output voltage corresponding for described each effluvium is sent to controller, wherein, described voltage correcting unit one end is connected with described Magnetic Sensor, and the other end is connected with described D/A conversion unit.
5. according to the Magnetic Sensor compensating device described in claim 3 or 4, it is characterised in that described device also includes:
Temperature and Humidity unit, for detecting the temperature and humidity of described Magnetic Sensor place environment,
Wherein, described memorizer, it is connected with described Temperature and Humidity unit, for being stored in the output voltage or correction voltage that under the temperature and humidity that described Temperature and Humidity unit detects, described each effluvium is corresponding.
Device the most according to any one of claim 1 to 4, it is characterised in that described Magnetic Sensor also includes:
Effluvium subarray shares resistance, one end ground connection, and the other end is connected with described effluvium subarray by shift switching unit；And
Described shift switching unit, is connected with described effluvium subarray, and described shift switching unit includes n switch, and wherein, each effluvium shares resistant series by a switch with described effluvium subarray.
Device the most according to claim 6, it is characterised in that described Magnetic Sensor also includes:
Divider resistance unit, for producing the benchmark voltage signal of described differential amplification unit,
Wherein, the input of the described differential amplification unit other end with described divider resistance unit and the described public resistance of effluvium subarray respectively is connected, and the outfan of described differential amplification unit is connected with the input of described voltage correcting unit.
Device the most according to claim 7, it is characterised in that described differential amplification unit includes that amplifier, described amplifier have two input voltage ports and a bias voltage port, wherein,
Two input voltage ports of described amplifier are respectively connected to described input voltage signal and described reference voltage signal, and the bias voltage port of described amplifier accesses the voltage signal of correction voltage corresponding to described each effluvium, or
One of them input voltage port of described amplifier accesses described input voltage signal, and another input voltage port accesses the voltage signal of correction voltage corresponding to described each effluvium, and the bias voltage port of described amplifier accesses predeterminated voltage signal.
Device the most according to claim 7, it is characterised in that described differential amplification unit includes that at least two amplifier, each amplifier have two input voltage ports and a bias voltage port, wherein,
One of them input voltage port of first amplifier and the second amplifier accesses described benchmark voltage signal, and wherein, described at least two amplifier includes described first amplifier and described second amplifier,
Another input voltage port of described first amplifier accesses described input voltage signal, the bias voltage port of described first amplifier accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to described first amplifier is corresponding
Another access voltage port of described second amplifier inputs the output signal of described first amplifier, and the bias voltage port of described second amplifier accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to described second amplifier is corresponding.
Device the most according to claim 6, it is characterised in that described differential amplification unit includes that at least two amplifier, each amplifier have two input voltage ports and a bias voltage port, wherein,
The bias voltage port of the first amplifier and the second amplifier accesses predeterminated voltage signal, and wherein, described at least two amplifier includes described first amplifier and described second amplifier,
One input voltage port of described first amplifier accesses described input voltage signal, and another input voltage port accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to described first amplifier is corresponding,
One input voltage port of described second amplifier accesses the output signal of described first amplifier, and another input voltage port accesses the voltage signal that correction voltage corresponding to calculated each effluvium of output signal according to described second amplifier is corresponding.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652228A (en) * | 2015-12-30 | 2016-06-08 | 威海华菱光电股份有限公司 | Magnetic sensor correction device and method |
| CN108627190A (en) * | 2017-07-28 | 2018-10-09 | 无锡思泰迪半导体有限公司 | A kind of high-precision Magnetic Sensor correcting structure and bearing calibration based on integrated circuit |
-
2015
- 2015-12-30 CN CN201521133744.7U patent/CN205450239U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652228A (en) * | 2015-12-30 | 2016-06-08 | 威海华菱光电股份有限公司 | Magnetic sensor correction device and method |
| CN108627190A (en) * | 2017-07-28 | 2018-10-09 | 无锡思泰迪半导体有限公司 | A kind of high-precision Magnetic Sensor correcting structure and bearing calibration based on integrated circuit |
| CN108627190B (en) * | 2017-07-28 | 2023-12-19 | 杭州思泰微电子有限公司 | High-precision magnetic sensor correction structure and correction method based on integrated circuit |
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