CN105652228A

CN105652228A - Magnetic sensor correction device and method

Info

Publication number: CN105652228A
Application number: CN201511026394.9A
Authority: CN
Inventors: 戚务昌; 林永辉
Original assignee: Weihai Hualing Opto Electronics Co Ltd
Current assignee: Weihai Hualing Opto Electronics Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-08

Abstract

The invention discloses a magnetic sensor correction device and method. The device comprises a magnetic sensor, a voltage correction unit and a controller, wherein the magnetic sensor comprises a differential amplifying unit and a magnetic element array, the magnetic element array comprises n magnetic elements, the differential amplifying unit is used for generating an output voltage signal according to the received input voltage signal, and the output voltage signal comprises the output voltage corresponding to each magnetic element in n magnetic elements; the voltage correction unit is connected with the magnetic sensor and is used for computing the correction voltage corresponding to the magnetic element Ci according to the output voltage corresponding to the magnetic element Ci; the controller is respectively connected with the magnetic sensor and the voltage correction unit and used for inputting the voltage signal of the correction voltage corresponding to each magnetic element to the differential amplifying unit. Through the adoption of the device and method disclosed by the invention, the technical problem that the magnetic sensor detection precision is reduced since the output signals of the plurality of magnetic elements are inhomogeneous under the condition of absence of a detection object in the prior art is solved.

Description

Magnetic Sensor compensating device and method

Technical field

The present invention relates to Magnetic testi field, in particular to a kind of Magnetic Sensor compensating device and method.

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 generally 18 passages, is namely provided with 18 effluvium in 180 millimeters of sweep lengths, and average 1 effluvium covers the detection range of about 10 millimeters. When within the scope 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 of corresponding 360 effluvium of sweep length. This Magnetic Sensor adopts serial mode output signal, due to the discreteness between effluvium, or the impact that the factor such as surrounding causes, when not detecting thing, the heterogeneity that the output signal of 360 effluvium of Magnetic Sensor also can become, seriously reduces the accuracy of detection of Magnetic Sensor.

For the Magnetic Sensor in correlation technique when not detecting thing due to multiple effluviums output inequality signal one cause reduce Magnetic Sensor accuracy of detection problem, effective solution is not yet proposed at present.

Summary of the invention

Embodiments provide a kind of Magnetic Sensor compensating device and method, cause the technical problem reducing Magnetic Sensor accuracy of detection at least solving Magnetic Sensor in the correlation technique output inequality signal one due to multiple effluviums when not detecting thing.

An aspect according to embodiments of the present invention, 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 the correction voltage corresponding with the sub-Ci of effluvium according to the output voltage corresponding with the sub-Ci of effluvium, wherein, being under sky scanning mode at Magnetic Sensor, and be connected under state at the sub-Ci of effluvium with differential amplification unit, the output voltage of Magnetic Sensor is the output voltage corresponding with the sub-Ci of effluvium, i takes 1 to n, n effluvium attached bag successively and draws together 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 by the voltage signal input of correction voltage corresponding for each effluvium 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 output voltage signal is sampled, 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, the output voltage corresponding for storing each effluvium, 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 be stored under the temperature and humidity that Temperature and Humidity unit detects each effluvium corresponding output voltage or correction voltage.

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 differential amplification unit is connected with the other end of divider resistance unit and the public resistance of effluvium subarray respectively, and the outfan of differential amplification unit is connected with the input of correction voltage cell.

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.

Further, 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 output calculated each effluvium of 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 output calculated each effluvium of 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 output calculated each effluvium of 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 output calculated each effluvium of signal according to the second amplifier is corresponding.

Another aspect according to embodiments of the present invention, additionally provide a kind of Magnetic Sensor correction method, including: obtain the output voltage signal that Magnetic Sensor exports when sky scans, Magnetic Sensor includes 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; The correction voltage that each effluvium is corresponding is calculated according to the output voltage that each effluvium in n effluvium that output voltage signal includes is corresponding; And utilize the correction voltage that each effluvium is corresponding that Magnetic Sensor is maked corrections when Magnetic Sensor scans object.

Further, after obtaining the output voltage signal that Magnetic Sensor exports when sky scans, the method also includes: output voltage signal is carried out analog digital conversion, obtain the output voltage that each effluvium is corresponding, and perform to calculate according to the output voltage that effluvium each in n effluvium is corresponding the step of correction voltage corresponding to each effluvium; After calculating the correction voltage that each effluvium is corresponding, store the correction voltage that each effluvium is corresponding, wherein, the correction voltage that each effluvium is corresponding is obtained when Magnetic Sensor scans object, correction voltage corresponding for each effluvium is carried out digital-to-analogue conversion, and the step that Magnetic Sensor is maked corrections by the correction voltage performing to utilize each effluvium corresponding.

Further, after obtaining the output voltage signal that Magnetic Sensor exports when sky scans, the method also includes: output voltage signal carries out analog digital conversion, obtains the output voltage that in n effluvium, each effluvium is corresponding;Store the output voltage that each effluvium is corresponding, wherein, the output voltage that each effluvium is corresponding is obtained when Magnetic Sensor scans object, perform to calculate the step of correction voltage corresponding to each effluvium according to the output voltage that effluvium each in n effluvium is corresponding, after calculating the correction voltage that each effluvium is corresponding, correction voltage corresponding for each effluvium is carried out digital-to-analogue conversion, and the step that Magnetic Sensor is maked corrections by the correction voltage performing to utilize each effluvium corresponding.

Further, differential amplification unit includes multiple amplifier, wherein, in differential amplification unit, carry out the number of times of empty scanning with Magnetic Sensor identical for the number of amplifier, wherein: when Magnetic Sensor carries out first time sky scanning, obtain the output voltage signal of the first amplifier according to input voltage signal, wherein, the output voltage signal of the first amplifier is the input voltage signal of the second amplifier, and multiple amplifiers include the first amplifier and the second amplifier; Output voltage signal according to the first amplifier calculates the correction voltage that the first amplifier is corresponding, and wherein, the correction voltage that the first amplifier is corresponding is used for the first amplifier is maked corrections when Magnetic Sensor scans object; When Magnetic Sensor carries out second time sky scanning, first amplifier is maked corrections by the correction voltage using the first amplifier corresponding, and using the output voltage signal of the first amplifier input voltage signal as the second amplifier, obtain the output voltage signal of the second amplifier; Output voltage signal according to the second amplifier calculates the correction voltage that the second amplifier is corresponding, and wherein, the correction voltage that the second amplifier is corresponding is used for the second amplifier is maked corrections when Magnetic Sensor scans object.

Further, amplifier has input voltage port and bias voltage port, and wherein, the correction voltage correction position in the amplifier that each effluvium is corresponding is input voltage port or bias voltage port.

Further, the ambient parameter of detection Magnetic Sensor place environment when Magnetic Sensor scans object, including temperature and humidity; Calling the correction voltage correction Magnetic Sensor that each effluvium corresponding with ambient parameter is corresponding, wherein, there is default corresponding relation with ambient parameter in the correction voltage that each effluvium of obtaining when Magnetic Sensor sky scan is corresponding.

In embodiments of the present invention, 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 the correction voltage corresponding with the sub-Ci of effluvium according to the output voltage corresponding with the sub-Ci of effluvium, wherein, being under sky scanning mode at Magnetic Sensor, and be connected under state at the sub-Ci of effluvium with differential amplification unit, the output voltage of Magnetic Sensor is the output voltage corresponding with the sub-Ci of effluvium, i takes 1 to n, n effluvium attached bag successively and draws together 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 by the voltage signal input of correction voltage corresponding for each effluvium 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 when not detecting thing owing to the output inequality signal one 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 a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram of Magnetic Sensor compensating device according to embodiments of the present invention;

Fig. 2 is the structural representation of a kind of optional Magnetic Sensor according to embodiments of the present invention;

Fig. 3 is the structural representation of another kind of optional Magnetic Sensor according to embodiments of the present invention;

Fig. 4 is the structural representation of the optional Magnetic Sensor of according to embodiments of the present invention another;

Fig. 5 is the structural representation of the optional Magnetic Sensor of according to embodiments of the present invention another;

Fig. 6 is the schematic diagram of a kind of optional Magnetic Sensor compensating device according to embodiments of the present invention;

Fig. 7 is the schematic diagram of another kind of optional Magnetic Sensor compensating device according to embodiments of the present invention;

Output voltage waveform when Fig. 8 a is offset side correction difference amplifier sky scanning according to embodiments of the present invention;

Fig. 8 b is offset side correction difference amplifier correction voltage oscillogram according to embodiments of the present invention;

Output voltage waveform when Fig. 8 c is offset side correction difference amplifier sky scanning after correction according to embodiments of the present invention;

Output voltage waveform when Fig. 9 a is input correction difference amplifier sky scanning according to embodiments of the present invention;

Fig. 9 b is input correction difference amplifier correction voltage oscillogram according to embodiments of the present invention;

Output voltage waveform when Fig. 9 c is input correction difference amplifier sky scanning after correction according to embodiments of the present invention; And

Figure 10 is the flow chart of Magnetic Sensor correction method according to embodiments of the present invention.

Detailed description of the invention

In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a present invention part, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of protection of the invention.

It should be noted that term " first " in description and claims of this specification 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 embodiments of the invention described herein can with except here diagram or describe those except order implement. In addition, term " includes " and " having " and their any deformation, it is intended to cover non-exclusive comprising, such as, contain series of steps or the process of unit, method, system, product or equipment be not necessarily limited to those steps or the unit clearly listed, but can include clearly not listing or for intrinsic other step of these processes, method, product or equipment or unit.

According to embodiments of the present invention, it is provided that the embodiment of a kind of Magnetic Sensor compensating device, it is necessary to explanation, this device goes for the Magnetic Sensor of any kind or model, utilizes this device can realize improving the purpose of Magnetic Sensor accuracy of detection.

Fig. 1 is the schematic diagram of Magnetic Sensor compensating device according to embodiments of the present invention, 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 the embodiment of the present invention, separately below the various piece in this Magnetic Sensor compensating device is described in detail respectively, specifically:

The embodiment of the present invention not kind and model to Magnetic Sensor 10 is construed as limiting, and in this embodiment, the structure of Magnetic Sensor 10 can be any one in following several structure:

Fig. 2 is the structural representation of a kind of optional Magnetic Sensor according to embodiments of the present invention, 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 including 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 include n to switch, the number of switch is identical with the sub-number of effluvium, each effluvium shares resistance R1 by a switch with effluvium subarray and connects, the shift switching unit 12 control by switching, 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. differential amplification unit 13 can include amplifier, this amplifier can with bias voltage function, there are two input voltage ports, one bias voltage port B and an output port, two input ports are connected with the other end of the shared resistance R1 of effluvium subarray and divider resistance unit 14 respectively, for being respectively connected to input voltage signal and reference voltage signal, wherein, input voltage signal refers to and shares, through effluvium subarray, the voltage signal obtained after 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 another kind of optional Magnetic Sensor according to embodiments of the present invention, as shown in Figure 3, Magnetic Sensor 10 shown in Fig. 3 is distinctive in that with 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 including one or more amplifier in the differential amplification unit 13 in this embodiment, the embodiment of the present invention includes two amplifiers for differential amplification unit 13 and illustrates. Fig. 4 is the structural representation of the optional Magnetic Sensor of according to embodiments of the present invention another, as shown in Figure 4, Magnetic Sensor 10 shown in Fig. 4 is distinctive in that with the Magnetic Sensor 10 shown in Fig. 1: differential amplification unit 13 includes two amplifiers, 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 correction voltage cell 20, correction voltage signal corresponding to voltage corresponding for accessing output calculated each effluvium of signal V1x according to the first amplifier. another access voltage port of second amplifier is connected with the output port of the first amplifier, for inputting the output signal V1x of the first amplifier, the bias voltage port B2 of the second amplifier is connected with the outfan of correction voltage cell 20, correction voltage signal corresponding to voltage corresponding for accessing output calculated each effluvium of signal V2x according to the second amplifier.

Fig. 5 is the structural representation of the optional Magnetic Sensor of according to embodiments of the present invention another, as shown in Figure 5, Magnetic Sensor 10 shown in Fig. 5 is distinctive in that with the Magnetic Sensor 10 shown in Fig. 3: differential amplification unit 13 includes two amplifiers, 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 correction voltage cell 20, correction voltage signal corresponding to voltage corresponding for accessing output calculated each effluvium of signal V1x according to the first amplifier, 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 correction voltage cell 20, correction voltage signal corresponding to voltage corresponding for accessing output calculated each effluvium of signal V2x according to the second amplifier.

Voltage correcting unit 20, it is connected with Magnetic Sensor 10, for calculating the correction voltage corresponding with the sub-Ci of effluvium according to the output voltage corresponding with the sub-Ci of effluvium, wherein, being under sky scanning mode at Magnetic Sensor 10, and be connected under state at the sub-Ci of effluvium with differential amplification unit 13, the output voltage of Magnetic Sensor 10 is the output voltage corresponding with the sub-Ci of effluvium, i takes 1 to n, n effluvium attached bag successively and draws together 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 by the voltage signal input 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, voltage correcting unit 20 utilizes the output voltage signal that Magnetic Sensor 10 exports can calculate the correction voltage that each effluvium is corresponding, controller 30 can control the voltage signal of the correction voltage that Magnetic Sensor 10 utilizes when actual scanning object each effluvium corresponding and Magnetic Sensor 10 is maked corrections, to realize improving the purpose of Magnetic Sensor 10 accuracy of detection. The embodiment of the present invention will 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 embodiments of the present invention, as shown in Figure 6, this device may include that Magnetic Sensor 10, data processing unit 20 (namely the voltage correcting unit 20 in the embodiment of the present invention), 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 (namely the voltage correcting unit 20 in the embodiment of the present invention), output voltage signal for Magnetic Sensor 10 is exported 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 (namely the voltage correcting unit 20 in the embodiment of the present invention), the other end is connected with controller 30, the correction voltage corresponding for storing calculated each effluvium of data processing unit 20, 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 another kind of optional Magnetic Sensor compensating device according to embodiments of the present invention, as shown in Figure 7, this device may include that Magnetic Sensor 10, operation circuit unit 20 (namely the voltage correcting unit 20 in the embodiment of the present invention), 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 (namely the voltage correcting unit 20 in the embodiment of the present invention), output voltage signal for Magnetic Sensor 10 is exported 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, the output voltage corresponding for storing each effluvium that AD conversion unit 40 obtains, 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 (namely the voltage correcting unit 20 in the embodiment of the present invention), 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, calculate the voltage signal of correction voltage corresponding to each effluvium for the voltage signal of the output voltage corresponding according 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 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. It can be analogue signal that the digital signal that controller 30 is inputted by the D/A conversion unit 50 shown in Fig. 6 and Fig. 7 converts, 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 the embodiment of the present invention, 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 correction voltage computing function. Wherein, data processing unit can be the microprocessors such as FPGA, ARM, DSP. Memorizer 60 shown in Fig. 6 and 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 the invention described above embodiment is 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 drawing the amplification signal of a line all effluviums magnetoreceptive change of son. Here for being easy to 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 resistance of the initial relative R1 of resistance 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 the sub-output voltage values Vx of each effluvium, and data processing unit calculates the correction voltage that each effluvium is corresponding, and namely 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, namely controller takes out correction data successively from memorizer and is supplied to differential amplification unit offset side B, offset side B voltage waveform now as shown in Figure 8 b by D/A conversion unit. The final output waveform of Magnetic Sensor when so sky is swept after correction as shown in Figure 8 c, namely 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 to differential amplification unit offset side B, the Vx (x=1 of now Magnetic Sensor output, 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, namely 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. As shown in Figure 8 c, equally possible reaching eliminates the deviation between each effluvium to the final output voltage waveforms of Magnetic Sensor when so sky scans after correction, obtains the effect of comparatively accurate output.

Embodiment 3, in Magnetic Sensor compensating device as shown in Figure 6, the circuit structure of Magnetic Sensor is as shown in Figure 3, wherein, 13 is differential amplification unit, and amplification is G, 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, namely controller takes out the value of Mx successively from memorizer, it is sent to D/A conversion unit, at input reference edge A place 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, namely eliminates the deviation between each effluvium, obtains comparatively exporting 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 the 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, namely 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, now inputs the waveform of reference edge A as shown in figure 9b. So after correction the empty final output voltage waveforms of Magnetic Sensor when sweeping as is shown in fig. 9 c, the deviation between each effluvium of equally possible elimination, obtain comparatively exporting 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 first time sky scanning, it is U/2 that controller arranges the voltage of two difference amplifiers offset side B1, B2. AD conversion unit is sampled the output V1x (x=1,2,3 of first order difference amplifier successively, 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 second time sky scanning, 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 more 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 first time sky 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 second time sky scanning, 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, namely the V1x value that 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 sky 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, namely V1x and the V2x value that controller takes out this effluvium corresponding from memorizer is sent to AD conversion unit, operation circuit unit is exported by AD conversion unit after being simulated, operation circuit unit simultaneously 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), it is applied respectively to offset side B1 and B2, this completes the correction of two-stage offset side, make output more 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 first time sky 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 second time sky scanning, 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, namely 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, now just obtain the output through the correction of two-stage input, make output more 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 first time sky 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 second time sky scanning, 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, namely the V1x value that 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 sky 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, namely V1x and the V2x value that controller takes out this effluvium corresponding from memorizer is sent to AD conversion unit, operation circuit unit is exported by AD conversion unit after being simulated, operation circuit unit simultaneously 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), it is applied respectively to input A1 and A2, this completes the correction of two-stage input, make output more accurate.

By the description of above-described embodiment, the Magnetic Sensor compensating device of the embodiment of the present invention can solve the Magnetic Sensor in correlation technique when not detecting thing owing to the output inequality signal one 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 the embodiment of the present invention 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 be stored under the temperature and humidity that Temperature and Humidity unit detects each effluvium corresponding output voltage or correction voltage. Many set correction data that in embodiment of the present invention memorizer, the different humiture of storage is corresponding, by the humiture of the real-time surrounding being monitored of Temperature and Humidity unit when Magnetic Sensor works, adopt 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.

According to embodiments of the present invention, provide the embodiment of a kind of Magnetic Sensor correction method, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although illustrate logical order in flow charts, but in some cases, it is possible to perform shown or described step with the order being different from herein.

It should be noted that, the Magnetic Sensor correction method of the embodiment of the present invention can perform in any one Magnetic Sensor compensating device in embodiments of the present invention, and the controller in the Magnetic Sensor compensating device of the embodiment of the present invention can perform the Magnetic Sensor correction method of the embodiment of the present invention. Can reach to eliminate the deviation of effluvium in Magnetic Sensor by the Magnetic Sensor correction method of the embodiment of the present invention, reach to improve the effect of Magnetic Sensor accuracy of detection.

Figure 10 is the flow chart of Magnetic Sensor correction method according to embodiments of the present invention, and as shown in Figure 10, the method comprises the steps:

Step S102, obtains the output voltage signal that Magnetic Sensor exports when sky scans.

In the step S102 scheme provided, Magnetic Sensor can be any kind or model, and its structure can for any one structure shown in Fig. 2 to Fig. 5.Magnetic Sensor can include differential amplification unit and effluvium subarray, can include n effluvium in effluvium subarray, and n is the natural number of more than 2. Differential amplification unit may be used for generating output voltage signal according to the input voltage signal received, and wherein, output voltage signal includes the output voltage that in n effluvium, each effluvium is corresponding. The process that Magnetic Sensor generates output voltage signal according to input voltage signal can refer to above-described embodiment 1 to embodiment 8, and the waveform of output voltage signal can as shown in Fig. 8 a or Fig. 9 a.

Step S104, calculates, according to the output voltage that each effluvium in n effluvium that output voltage signal includes is corresponding, the correction voltage that each effluvium is corresponding.

In the step S104 scheme provided, the voltage correcting unit 20 can having in the embodiment of the present invention in Magnetic Sensor compensating device calculates the correction voltage that each effluvium is corresponding, concrete calculating process can also refer to above-described embodiment 1 to embodiment 8, and the waveform of the voltage signal of the correction voltage that each effluvium is corresponding can as shown in Fig. 8 b or Fig. 9 b.

Step S106, utilizes the correction voltage that each effluvium is corresponding that Magnetic Sensor is maked corrections when Magnetic Sensor scans object.

In the step S106 technical scheme provided, can obtain during the scanning of Magnetic Sensor sky due to output voltage corresponding to the sub-deviation of each effluvium each effluvium, and then can obtain, according to the output voltage that each effluvium is corresponding, the correction voltage that each effluvium is corresponding, utilize the correction voltage that each effluvium is corresponding when scanning object, Magnetic Sensor can be maked corrections. Above-described embodiment 1 to embodiment 8 can also be referred in voltage correction position, and after correction, the waveform of the voltage signal of Magnetic Sensor output can as shown in Fig. 8 c or Fig. 9 c.

Pass through above-mentioned steps, the Magnetic Sensor in solution correlation technique can be realized when not detecting thing owing to the output inequality signal one 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 effect of Magnetic Sensor accuracy of detection.

It should be noted that the Magnetic Sensor correction method of the embodiment of the present invention can also include following two optional embodiment

As a kind of optional embodiment, after step S102 obtains the output voltage signal that Magnetic Sensor exports when sky scans, the Magnetic Sensor correction method of this embodiment can also include: output voltage signal is carried out analog digital conversion, obtain the output voltage that each effluvium is corresponding, and perform step S104 and calculate, according to the output voltage that effluvium each in n effluvium is corresponding, the correction voltage that each effluvium is corresponding; After step S104 calculates the correction voltage that each effluvium is corresponding, store the correction voltage that each effluvium is corresponding, wherein, the correction voltage that each effluvium is corresponding is obtained when Magnetic Sensor scans object, correction voltage corresponding for each effluvium is carried out digital-to-analogue conversion, and performs step S106 and utilize the correction voltage that each effluvium is corresponding that Magnetic Sensor is maked corrections.

As an alternative embodiment, after step S102 obtains the output voltage signal that Magnetic Sensor exports when sky scans, the Magnetic Sensor correction method of this embodiment can also include: output voltage signal carries out analog digital conversion, obtains the output voltage that in n effluvium, each effluvium is corresponding; Store the output voltage that each effluvium is corresponding, wherein, the output voltage that each effluvium is corresponding is obtained when Magnetic Sensor scans object, perform step S104 and calculate, according to the output voltage that effluvium each in n effluvium is corresponding, the correction voltage that each effluvium is corresponding, after step S104 calculates the correction voltage that each effluvium is corresponding, correction voltage corresponding for each effluvium is carried out digital-to-analogue conversion, and performs step S106 and utilize the correction voltage that each effluvium is corresponding that Magnetic Sensor is maked corrections.

It should be noted that, this embodiment increases and Magnetic Sensor output voltage signal is carried out analog digital conversion, stores output voltage corresponding to each effluvium or stores correction voltage corresponding to each effluvium and correction voltage corresponding to output voltage corresponding for each effluvium or each effluvium carries out the step of digital-to-analogue conversion, can reach to improve the accuracy that output voltage signal is processed, and then improve the effect of Magnetic Sensor accuracy of detection.

As a kind of optional embodiment, the structure of the Magnetic Sensor in the embodiment of the present invention can as shown in Fig. 4 or Fig. 5, and wherein, differential amplification unit can include multiple amplifier, it should be noted that in differential amplification unit the number of amplifier carry out the number of times of empty scanning with Magnetic Sensor identical. Assume that multiple amplifier includes two amplifiers, i.e. the first amplifier and the second amplifier, the method carrying out making corrections for the Magnetic Sensor shown in Fig. 4 or Fig. 5 may include that when Magnetic Sensor carries out first time sky scanning, the output voltage signal of the first amplifier is obtained according to input voltage signal, wherein, the output voltage signal of the first amplifier is the input voltage signal of the second amplifier, and multiple amplifiers include the first amplifier and the second amplifier; Output voltage signal according to the first amplifier calculates the correction voltage that the first amplifier is corresponding, and wherein, the correction voltage that the first amplifier is corresponding is used for the first amplifier is maked corrections when Magnetic Sensor scans object; When Magnetic Sensor carries out second time sky scanning, first amplifier is maked corrections by the correction voltage using the first amplifier corresponding, and using the output voltage signal of the first amplifier input voltage signal as the second amplifier, obtain the output voltage signal of the second amplifier; Output voltage signal according to the second amplifier calculates the correction voltage that the second amplifier is corresponding, and wherein, the correction voltage that the second amplifier is corresponding is used for the second amplifier is maked corrections when Magnetic Sensor scans object. The situation that the Magnetic Sensor of multiple amplifier carries out making corrections is included for differential amplification unit and can refer to the above embodiments 5 to embodiment 8 of the present invention, repeat no more herein.

It should be noted that, in the Magnetic Sensor correction method of this embodiment, amplifier has input voltage port and bias voltage port, wherein, the correction voltage correction position in the amplifier that each effluvium is corresponding can be Input voltage terminal mouth or bias voltage port.

The Magnetic Sensor correction method of the embodiment of the present invention (does not detect object) when sky scans and reads the output point voltage signal that each effluvium of Magnetic Sensor a line is sub, stores after analog digital conversion. When actual scanning object, data when each effluvium sky of storage is scanned by controller timesharing successively obtain correction Voltage Feedback to Magnetic Sensor by D/A conversion unit and external arithmetic unit, and Magnetic Sensor now just exports the scanning signal after correction. The method can be the correction of offset side reference voltage, namely the make corrections correction position of voltage is the offset side reference voltage of differential amplification unit, can also being input reference edge reference voltage correction, the correction position of the voltage that namely makes corrections be an input pin of differential amplification unit. Wherein, the position of correction voltage correction is different, and in memorizer, the correction data of storage are also different accordingly, and signal processing method is also different accordingly. The method can be one-level correction or multistage correction, and memorizer stores the correction magnitude of voltage of every one-level respectively accordingly.

As a kind of optional embodiment, the ambient parameter of detection Magnetic Sensor place environment when Magnetic Sensor scans object, including temperature and humidity;Calling the correction voltage correction Magnetic Sensor that each effluvium corresponding with ambient parameter is corresponding, wherein, there is default corresponding relation with ambient parameter in the correction voltage that each effluvium of obtaining when Magnetic Sensor sky scan is corresponding. In this embodiment, memorizer can store many set correction data that varying environment parameter i.e. different humitures are corresponding, this embodiment can pass through the humiture of Temperature and Humidity unit detection surrounding, and controller can select a set of correction magnitude of voltage corresponding with current humiture in memorizer that Magnetic Sensor is maked corrections. Impacting thus eliminating surrounding, improving Magnetic Sensor accuracy of detection.

By the Magnetic Sensor compensating device of the embodiment of the present invention and method, can be maked corrections Magnetic Sensor output bias signal completely, and then the Magnetic Sensor in solution correlation technique when not detecting thing due to multiple effluviums output inequality signal one cause reduce Magnetic Sensor accuracy of detection technical problem, realize eliminating the deviation between each effluvium, improve the Magnetic Sensor effect to the accuracy of detection of magnetisable material.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, certain embodiment there is no the part described in detail, it is possible to referring to the associated description of other embodiments.

In several embodiments provided herein, it should be understood that disclosed technology contents, can realize by another way. Wherein, device embodiment described above is merely schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not perform. Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, unit or module, it is possible to be electrical or other form.

The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple unit. Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.

It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit. Above-mentioned integrated unit both can adopt the form of hardware to realize, it would however also be possible to employ the form of SFU software functional unit realizes.

If described integrated unit is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium. Based on such understanding, part or all or part of of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can for personal computer, server or the network equipment etc.) performs all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium includes: USB flash disk, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD.

The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims

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 the correction voltage corresponding with the sub-Ci of described effluvium according to the output voltage corresponding with the sub-Ci of effluvium, wherein, being under sky scanning mode at described Magnetic Sensor, and be connected under state at the sub-Ci of described effluvium with described differential amplification unit, the output voltage of described Magnetic Sensor is the output voltage corresponding with the sub-Ci of described effluvium, i takes 1 to n successively, and described n effluvium attached bag draws together 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 of correction voltage corresponding for described each effluvium to described differential amplification unit.

2. device 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 described output voltage signal is sampled, 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.

3. device 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.

4. device 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, the output voltage corresponding for storing described each effluvium, 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. the Magnetic Sensor compensating device according to 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 be stored under the temperature and humidity that described Temperature and Humidity unit detects described each effluvium corresponding output voltage or correction voltage.

6. device 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.

7. device 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 described differential amplification unit is connected with the other end of described divider resistance unit and the described public resistance of effluvium subarray respectively, and the outfan of described differential amplification unit is connected with the input of described correction voltage cell.

8. device according to claim 7, it is characterised in that described differential amplification unit includes amplifier, described amplifier has two input voltage ports and 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.

9. device according to claim 7, it is characterised in that described 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 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 output calculated each effluvium of 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 output calculated each effluvium of signal according to described second amplifier is corresponding.

10. device according to claim 6, it is characterised in that described 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, 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 output calculated each effluvium of 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 output calculated each effluvium of signal according to described second amplifier is corresponding.

11. a Magnetic Sensor correction method, it is characterised in that including:

Obtain the output voltage signal that Magnetic Sensor exports when sky scans, described Magnetic Sensor includes differential amplification unit and effluvium subarray, described effluvium subarray includes n effluvium, described differential amplification unit is for generating described 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;

The correction voltage that each effluvium is corresponding is calculated according to the output voltage that each effluvium in described n effluvium that described output voltage signal includes is corresponding; And

Utilize the correction voltage that described each effluvium is corresponding that described Magnetic Sensor is maked corrections when described Magnetic Sensor scans object.

12. method according to claim 11, it is characterised in that after obtaining the output voltage signal that Magnetic Sensor exports when sky scans, described method also includes:

Described output voltage signal is carried out analog digital conversion, obtains the output voltage that described each effluvium is corresponding, and perform to calculate according to the output voltage that each effluvium in described n effluvium is corresponding the step of correction voltage corresponding to each effluvium;

After calculating the correction voltage that each effluvium is corresponding, store the correction voltage that described each effluvium is corresponding, wherein, the correction voltage that described each effluvium is corresponding is obtained when described Magnetic Sensor scans object, correction voltage corresponding for described each effluvium is carried out digital-to-analogue conversion, and the step that described Magnetic Sensor is maked corrections by the correction voltage performing to utilize described each effluvium corresponding.

13. method according to claim 11, it is characterised in that after obtaining the output voltage signal that Magnetic Sensor exports when sky scans, described method also includes:

Described output voltage signal is carried out analog digital conversion, obtains the output voltage that in described n effluvium, each effluvium is corresponding;

Store the output voltage that described each effluvium is corresponding, wherein, obtain the output voltage that described each effluvium is corresponding when described Magnetic Sensor scans object, perform to calculate according to the output voltage that each effluvium in described n effluvium is corresponding the step of correction voltage corresponding to each effluvium

After calculating correction voltage corresponding to each effluvium, correction voltage corresponding for described each effluvium is carried out digital-to-analogue conversion, and the step that described Magnetic Sensor is maked corrections by the correction voltage performing to utilize described each effluvium corresponding.

14. the method according to any one of claim 11 to 13, it is characterised in that described differential amplification unit includes multiple amplifier, wherein, in described differential amplification unit, carry out the number of times of empty scanning with described Magnetic Sensor identical for the number of amplifier, wherein:

When described Magnetic Sensor carries out first time sky scanning, the output voltage signal of the first amplifier is obtained according to input voltage signal, wherein, the input voltage signal that output voltage signal is the second amplifier of described first amplifier, the plurality of amplifier includes described first amplifier and described second amplifier;

Output voltage signal according to described first amplifier calculates the correction voltage that described first amplifier is corresponding, and wherein, the correction voltage that described first amplifier is corresponding is used for described first amplifier is maked corrections when described Magnetic Sensor scans object;

When described Magnetic Sensor carries out second time sky scanning, use the correction voltage that described first amplifier is corresponding that described first amplifier is maked corrections, and using the output voltage signal of the described first amplifier input voltage signal as the second amplifier, obtain the output voltage signal of described second amplifier;

Output voltage signal according to described second amplifier calculates the correction voltage that described second amplifier is corresponding, and wherein, the correction voltage that described second amplifier is corresponding is used for described second amplifier is maked corrections when described Magnetic Sensor scans object.

15. method according to claim 14, it is characterized in that, described amplifier has input voltage port and bias voltage port, and wherein, the correction voltage correction position in described amplifier that described each effluvium is corresponding is described input voltage port or bias voltage port.

16. the method according to any one of claim 11 to 13, it is characterised in that

The ambient parameter of described Magnetic Sensor place environment is detected, including temperature and humidity when described Magnetic Sensor scans object;

Calling correction voltage corresponding to each effluvium corresponding with described ambient parameter to make corrections described Magnetic Sensor, wherein, there is default corresponding relation with ambient parameter in the correction voltage that each effluvium of obtaining when described Magnetic Sensor sky scan is corresponding.