KR101342637B1 - Inductive angle sensor with gap compensation structure and signal processing method of the same - Google Patents

Abstract

Provided is an angle sensor with a gap compensation inductance method, which comprises a pair of receiving coils which is installed and formed to have the same shape and size to each other in order to always provide an accurate measurement value by compensating for a gap between the receiving coils and a coupler; a gap reference coil which is placed between the pair of the receiving coils, or in the outside; and the coupler which is formed having an area where the area of the gap reference coil is added to the area of one of the receiving coils, or an area corresponding to the area of one of the receiving coils, in order to perform rotation and reverse rotation or linear reciprocating motion when always covering or opening the gap reference coil. [Reference numerals] (30) Signal processor

Description

Gap Correction Inductance Angle Sensor and Signal Processing Method {Inductive Angle Sensor with Gap Compensation Structure and Signal Processing Method of The Same}

The present invention relates to a gap correction inductance angle sensor and a signal processing method thereof, and more particularly to a gap correction inductance angle sensor capable of further installing a gap correction receiving coil and correcting a gap using the signal of the receiving coil. A sensor and a signal processing method thereof are provided.

In general, in the case of a steering wheel or fuel gauge of a vehicle, a shift lever position of a vehicle, and various mechanical devices, it is very important to measure an accurate value for a rotation angle or a linear travel distance because accurate control can be performed. Therefore, it is used to install a displacement sensor for measuring the rotation angle of the rotating body or the linear moving distance of the object.

In general, the displacement sensor may be divided into a contact type and a non-contact type, and may be divided into an electric resistance type, a capacitive type, and an electromagnetic induction type (inductance type).

Conventional inductance angle sensor is configured by arranging a plurality of receiving coils having a phase difference between the semi-circular or rectangular coupler on the excitation coil wound in a round ring shape or a square shape.

The basic principle of the inductance angle sensor is to change the inductance of each receiving coil while having a phase difference from each other as the coupler rotates or moves linearly, thereby extracting information on the rotation angle.

However, if the distance between the coupler and the receiving coil is different from the set value during the assembling or use of the coupler, a change occurs between the measured value and the designed value, and the problem that the information on the exact rotation angle cannot be obtained. have.

Republic of Korea Patent Publication No. 10-1042974 is a signal for inductance angle sensor that can always obtain the correct measured value by adjusting the measured value corresponding to the change of the distance between the receiving coil and the coupler for the signal received from a pair of receiving coil Techniques for processors and signal processing methods are disclosed.

The present invention is made by approaching the above point from the angle and signal processing method for the conventional inductance angle sensor signal processor and the signal processing method, which measures the angle or distance while moving forward or backward only within a certain angle or distance range SUMMARY OF THE INVENTION An object of the present invention is to provide a gap correction inductance angle sensor capable of correcting a gap between a receiving coil and a coupler by installing a gap correction receiving coil in an angle sensor and utilizing a signal obtained from the receiving coil.

According to an embodiment of the present invention, a gap correction inductance angle sensor includes a pair of receiving coils formed and installed to have the same shape and area, a gap reference coil disposed between the pair of receiving coils, and the gap reference coil. A coupler formed of a sum of an area and an area of the one receiving coil or an area corresponding to the area of the one receiving coil, the coupler being capable of forward / reverse rotation or reciprocal linear movement while always covering or opening the gap reference coil. It is made to include.

When the coupler is formed by the sum of the area of the gap reference coil and the area of one of the receiving coils, the rotation range or the moving range is such that the coupler rotates forward or linearly while always covering the entire area of the gap reference coil. Install in a restricted state.

When the coupler is formed with an area corresponding to the area of one of the receiving coils, the coupler is installed in a state in which the rotation range or the movement range is limited so as to perform forward and reverse rotation or linear movement in a state where the entire area of the gap reference coil is always opened. do.

In the above, the angle of the coupler to rotate or the size of the moving distance (the size of the detected angle) is determined according to the angle or width of the gap reference coil shape.

The gap correction inductance angle sensor according to an embodiment of the present invention receives signal values measured from the pair of receiving coils and the gap reference coil, calculates these signal values, corrects the gap change of the coupler, and adjusts the rotation angle of the coupler. It is also possible to further include a signal processor for outputting a signal value.

The signal processing method of the gap correction inductance angle sensor according to an embodiment of the present invention is a gap between the pair of receiving coils formed and installed to have the same shape and area and the pair of receiving coils and the gap reference coils. A coupler, which is formed by adding the area of the reference coil and the area of one receiving coil or the area corresponding to the area of one receiving coil, is installed to cover the gap reference coil or open and perform forward / reverse rotation or linear movement. The signal value measured from the gap reference coil and the pair of receiving coils is input, and the signal value measured from the other receiving coil is subtracted from the signal value measured from the one receiving coil to obtain a measurement subtraction value. From the gap reference coil from the signal value measured from the one receiving coil. A first gap correction subtraction value is obtained by subtracting the signal value, and a second gap correction subtraction value is obtained by subtracting the signal value measured from the gap reference coil from the signal value measured from the other receiving coil. The gap correction subtraction value and the second gap correction subtraction value are added to obtain a gap correction addition value. And providing it as an output value.

According to the gap correction inductance angle sensor and the signal processing method according to an embodiment of the present invention, the gap reference coil is installed at a position where the measured value does not change with the rotation or movement of the coupler, and the measured value of the gap reference coil is It is possible to compensate for the gap error of the coupler, so that it is always possible to provide accurate measurements.

In addition, according to the gap compensation inductance angle sensor and the signal processing method according to the embodiment of the present invention, since the gap reference coil is installed and its signal value is used, the measured value does not change with the rotation or movement of the coupler. Therefore, the process of signal processing is not complicated, and it is possible to easily provide an accurate measurement value with a gap error corrected.

1 is an exploded perspective view illustrating a gap correction inductance angle sensor according to a first embodiment of the present invention.
2 is a plan view illustrating a gap correction inductance angle sensor according to a first embodiment of the present invention.
3 is a plan view illustrating a gap correction inductance angle sensor according to a second embodiment of the present invention.
4 is a plan view illustrating a gap correction inductance angle sensor according to a third embodiment of the present invention.
5 is a flowchart illustrating a gap compensation inductance angle sensor signal processing method according to a fourth embodiment of the present invention.
6 is a block diagram conceptually illustrating a configuration of a signal processor in a gap correction inductance angle sensor according to a fifth embodiment of the present invention.
7 is a flowchart illustrating a gap correction inductance angle sensor signal processing method according to a sixth embodiment of the present invention.
8 is a block diagram conceptually illustrating a configuration of a signal processor in a gap correction inductance angle sensor according to a seventh embodiment of the present invention.
9 is a flowchart illustrating a gap correction inductance angle sensor signal processing method according to an eighth embodiment of the present invention.
10 is a block diagram conceptually illustrating a configuration of a signal processor in a gap correction inductance angle sensor according to a ninth embodiment of the present invention.
FIG. 11 is a graph conceptually illustrating signal values measured from a pair of receiving coils and a gap reference coil in the gap correction inductance angle sensor according to the first embodiment of the present invention.

Next, a preferred embodiment of a gap correction inductance angle sensor and a signal processing method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention can be embodied in various forms and is not limited to the embodiments described below.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, wherein like numerals refer to like elements throughout.

First, the gap correction inductance angle sensor according to the first embodiment of the present invention, as shown in Figures 1 and 2, a pair of receiving coils (12), (14), the gap reference coil (18), It comprises a coupler 20.

The pair of receiving coils 12, 14 and the gap reference coil 18 are formed to form a circle.

For example, the pair of receiving coils 12, 14 and the gap reference coils 18 are formed by arranging one circle in a shape divided into three sectors.

In the above, the pair of receiving coils 12 and 14 are arranged in two fan shapes having the same shape at the same angle when the circle is divided into three fan shapes. That is, the pair of receiving coils 12 and 14 are formed in the same shape and area.

The gap reference coil 18 is disposed in the shape of the other fan shape in which the pair of receiving coils 12 and 14 are not arranged.

The coupler 20 is formed by installing the area of the gap reference coil 18 and the area of one of the receiving coils 12 and 14 as the sum.

The coupler 20 is installed to enable forward and reverse rotation in a state where the entire area of the gap reference coil 18 is always covered.

For example, when the coupler 20 is formed by adding the area of the gap reference coil 18 to the area of one of the receiving coils 12 and 14, the gap reference coil 18 is formed. It is installed in a state where the rotation range is limited so as to perform forward or reverse rotation while always covering the entire area.

The size of the angle at which the coupler 20 rotates (the size of the detected angle) is determined according to the fan-shaped angle of the gap reference coil 18.

For example, the angle obtained by subtracting the angle of the gap reference coil 18 from 360 degrees is an angle at which the pair of receiving coils 12 and 14 are installed, and the pair of receiving coils 12 and 14 are installed. The angle determines the size of the angle that can be detected.

Therefore, it is possible to set the size of the angle that can be detected depending on how much the angle of the gap reference coil 18 is set.

For example, when the angle of the gap reference coil 18 is set to 60 degrees, the pair of receiving coils 12 and 14 are installed at an angle of 300 degrees. It is determined by 150 degrees forward and 150 degrees reverse.

In the embodiment of the present invention, the coupler 20 is installed so as not to rotate more than 360 degrees.

As shown in FIG. 1, the pair of receiving coils 12 and 14 and the gap reference coil 18 are connected to the signal processor 30 to transmit the measured signal values to the signal processor 30. Configure.

The signal processor 30 receives the signal values measured from the pair of receiving coils 12, 14 and the gap reference coil 18, and calculates these signal values to calculate the gap change of the coupler 20. And to output a signal value for the rotation angle of the coupler 20.

In the gap compensation inductance angle sensor according to the second embodiment of the present invention, as illustrated in FIG. 3, the coupler 20 is formed to have an area corresponding to the area of one of the receiving coils 12 and 14. In addition, the gap reference coil 18 is installed to enable forward and reverse rotation at all times.

When the coupler 20 is formed as an area corresponding to the area of one of the receiving coils 12 and 18 as described above, the rotation of the gap reference coil 18 in the state of always opening or Install in a state where the rotation range is limited to reverse rotation.

And the gap correction inductance angle sensor according to the third embodiment of the present invention, as shown in Figure 4, is formed by installing a pair of receiving coils (12), 14 in the shape of a square of the same shape and area, A gap reference coil 18 is formed in a square shape between a pair of receiving coils 12 and 14, and a coupler 20 formed in a rectangular shape is formed from one receiving coil 12 to the other receiving coil ( 14) should be installed to enable linear movement.

The size of the coupler 20 is formed by setting one receiving coil 12 and the gap reference coil 18 to the sum of the shape and area.

In the above, the gap reference coil 18 is not installed between the pair of receiving coils 12 and 14, and the pair of receiving coils 12 and 14 are arranged in close proximity and the gap reference coil 18 is installed. It is also possible to arrange | position (18) outside the receiving coil 12 or the receiving coil 14, and to install.

When the gap reference coil 18 is disposed outside and installed as described above, the size of the coupler 20 is formed in an area and a shape corresponding to one receiving coil 12, and the coupler 20 is installed. It is preferable to limit the moving range of by setting the gap reference coil 18 to remain open at all times.

Next, a method of processing a signal obtained from a gap correction inductance angle sensor according to the first and second embodiments of the present invention configured as described above will be described.

As shown in FIG. 5, the signal processing method of the gap correction inductance angle sensor according to the fourth embodiment of the present invention is measured from a pair of receiving coils 12 and 14 and a gap reference coil 18. Step (S10) of receiving the dog (A, B, C) signal value, and the signal value measured from the other receiving coil 14 from the signal value (A) measured from the one receiving coil 12 ( Subtracting B) to obtain a measurement subtraction value AB (S30) and the signal value C measured from the gap reference coil 18 from the signal value A measured from the one receiving coil 12. Subtracting) to obtain a first gap correction subtraction value AC (S22) and a signal measured from the gap reference coil 18 from a signal value B measured from the other receiving coil 14 Subtracting the value C to obtain a second gap correction subtraction value BC (S24), and the first gap correction subtraction value AC and the second gap correction subtraction value BC. In addition, a step (S26) of obtaining a gap correction addition value ((AC) + (BC) = S) and a multiplier value by multiplying the measured subtraction value AB by a predetermined number (for example, 0.5, 2, 3, etc.) Obtaining ((AB) / 2) (S40) and dividing the multiple value ((AB) / 2) by the gap correction addition value S to obtain a division value ((AB) / (2S)) (S60) is made.

The constant number multiplied in the step (S40) of obtaining the multiple value is a number set according to the angle or range of movement distance to obtain the output.

The division value (A-B) / (2S) is provided as an output value Vout.

It is also possible to further perform the process of multiplying the reference voltage Vref before providing the division value (A-B) / (2S) as the output value Vout.

Figure 6 shows a gap correction inductance angle sensor according to a fifth embodiment of the present invention configured to implement the signal processing method of the gap correction inductance angle sensor according to the fourth embodiment of the present invention.

In the gap correction inductance angle sensor according to the fifth embodiment of the present invention, the signal processor 30 includes a measurement subtractor 36, a first gap correction subtractor 32, and a second gap correction subtractor 33. And a gap correction adder 34, a drainer 37, and a divider 38.

The measurement subtractor 36 subtracts the measurement value AB measured by subtracting the signal value B measured from the other reception coil 14 from the signal value A measured from the one reception coil 12. Output

The first gap correction subtractor 32 subtracts the signal value C measured from the gap reference coil 18 from the signal value A measured from the one receiving coil 12 to subtract the first gap correction. Output the value AC.

The second gap correction subtractor 33 subtracts the signal value C measured from the gap reference coil 18 from the signal value B measured from the other receiving coil 14 to compensate for the second gap correction. The subtraction value BC is output.

In the gap correction adder 34, the first gap correction subtractor AC output from the first gap correction subtractor 32 and the second gap correction subtractor 33 that are output from the second gap correction subtractor 33. Add (BC) to output the gap correction addition value ((AC) + (BC) = S).

The drainer 37 multiplies the measured subtraction value A-B output from the measurement subtractor 36 by a predetermined number (for example, 0.5) to output a multiple value (A-B) / 2.

The divider 38 divides the drain value (AB) / 2 output from the drainage 37 by the gap correction adder S output from the gap correction adder 34 to divide the divider value ((AB). ) / (2S)).

It is also possible to further provide a reference multiplier 39 for multiplying the reference voltage Vref before providing the division value (A-B) / (2S) as the output value Vout.

In the signal processing method of the gap correction inductance angle sensor according to the sixth embodiment of the present invention, as shown in FIG. 7, after the step S30 of obtaining the measurement subtraction value AB, the measurement subtraction value ( AB) adds the gap correction addition value (AC) + (BC) = S to obtain a secondary addition value A-B + S (S32), and the secondary addition value A-B +. Multiplying S by a certain number (e.g., 0.5) to obtain a multiple value ((A-B + S) / 2) (S42) and the multiple value ((A-B + S) / 2); And dividing by the gap correction addition value S to obtain a division value ((A-B + S) / (2S)).

The reference voltage Vref is multiplied by the division value (A-B + S) / (2S) to provide the output value Vout.

Also in the sixth embodiment described above, since it is possible to carry out the same configuration as the above-described fourth embodiment except for the above-described configuration, detailed description thereof will be omitted.

8 shows a gap correction inductance angle sensor according to a seventh embodiment of the present invention configured to implement a signal processing method of a gap correction inductance angle sensor according to a sixth embodiment of the present invention.

In the gap correction inductance angle sensor according to the seventh embodiment of the present invention, the signal processor 30 includes a measurement subtractor 36, a first gap correction subtractor 32, and a second gap correction subtractor 33. And a gap correction adder 34, a secondary adder 35, a drainer 37, a divider 38, and a reference multiplier 39.

In the secondary adder 35, the gap correction adder 34 outputted from the gap correction adder 34 to the measurement subtraction value AB output from the measurement subtractor 36 (AC) + (BC) = S. ) And outputs the second addition value (A-B + S).

In the drainer 37, the secondary addition value A-B + S output from the secondary adder 35 is multiplied by a predetermined number (for example, 0.5) to obtain a drainage value ((A-B + S) / Output 2).

The divider 38 divides the drain value ((A-B + S) / 2) output from the drainer 37 by the gap correction adder S output from the gap correction adder 34 to divide the divider value. Output the value ((A-B + S) / (2S)).

Also in the seventh embodiment described above, the present invention can be implemented in the same configuration as in the fifth embodiment except for the above-described configuration, and thus detailed description thereof will be omitted.

In the signal processing method of the gap correction inductance angle sensor according to the eighth embodiment of the present invention, as shown in FIG. 9, the step S30 of obtaining the measurement subtraction value AB and the multiplication value (AB) are shown. Instead of performing step (S42) or the like to obtain (2), the first gap correction subtraction value AC is divided by the gap correction addition value S to obtain a division value (AC) / S and output the result. It provides a step (S64) to provide (Vout).

Also in the eighth embodiment described above, it is possible to carry out the same configuration as the above-described fourth embodiment except for the above-described configuration, and thus, detailed description thereof will be omitted.

10 shows a gap compensation inductance angle sensor according to a ninth embodiment of the present invention configured to implement a signal processing method of a gap correction inductance angle sensor according to an eighth embodiment of the present invention.

In the gap correction inductance angle sensor according to the ninth embodiment of the present invention, the signal processor 30 includes a first gap correction subtractor 32, a second gap correction subtractor 33, and a gap correction adder 34. ), A divider 38 and a reference multiplier 39.

The divider 38 divides the first gap correction subtracted value AC output from the first gap correction subtracter 32 by the gap correction adder S output from the gap correction adder 34. The division value ((AC) / S) is output.

Also in the above-described ninth embodiment, the present invention can be implemented in the same configuration as the above-described fifth embodiment except for the above-described configuration, and thus detailed description thereof will be omitted.

Next, in the first to ninth embodiments of the present invention configured as described above, the gap (gap) between the coupler 20 and the pair of receiving coils 12 and 14 is corrected. Explain the principle.

For example, the signal values A, B, and C measured from the pair of receiving coils 12, 14 and the gap reference coil 18 are each represented by a graph as shown in FIG.

That is, the signal values A and B measured from the pair of receiving coils 12 and 14 have the same value with a phase difference of a predetermined angle (for example, 180 degrees), and the gap reference coil ( The signal value C measured from 18) always shows a constant value.

If the gap (gap) between the coupler 20 and the receiving coils 12 and 14 is changed, the signal measured from the pair of receiving coils 12, 14 and the gap reference coil 18 The values A, B, and C move vertically together. For example, a vertical shift is made from the graph of the signal values A, B and C shown below in FIG. 11 to the graph of the signal values A ', B' and C 'shown above. In Fig. 11, the value of the signal value is exaggerated and shown to be large, but in practice, the signal value is vertically moved little by little.

However, as shown in the graph of FIG. 11, the signal values A and B measured from the pair of receiving coils 12 and 14 are the signal values C measured from the gap reference coil 18. When the calculation is made with reference to the reference line, it is possible to obtain a value similar to that of no vertical movement, thereby obtaining the effect of correcting the gap of the coupler 20.

In the signal value measured as described above, the detection of the rotated angle (angle) is performed by the other one in the signal value A measured from one of the receiving coils 12 and 14 of the receiving coil 12. The measurement subtraction value AB obtained by subtracting the signal value B measured from the receiving coil 14 is used.

For example, the measured subtraction value AB obtained by subtracting the signal value A measured from the other receiving coil 14 from the signal value A measured from the one receiving coil 12 is a coupler 20. As the) rotates, a linear graph is inclined from the negative minimum value to the positive maximum value. Therefore, using the measured subtraction value AB, it is possible to detect the rotated angle (angle).

In FIG. 11, when the median average value M of the signal value A measured from the one receiving coil 12 and the signal value B measured from the other receiving coil 14 is calculated, M = It is represented by (A + B) / 2.

In the state where the signal value C measured from the gap reference coil 18 is referred to as a value of "0", the other signal is received from the signal value A measured from the one receiving coil 12. When the value obtained by subtracting the signal value B measured from the coil 14 is S, the measured subtraction value AB may be represented by a range of -S ≦ (AB) ≦ S.

In order to represent the range of the measured subtraction value AB as a positive value, adding "S" to each term can be expressed by a formula of 0≤ (A-B + S) ≤2S, where each term is again " Dividing by 2S "can be expressed by the formula of 0≤ ((A-B + S) / (2S)) ≤1.

It is possible to detect the angle (angle) at which the coupler 20 rotates from the value of Ratio = (A-B + S) / (2S) having a value between 0 and 1 above.

Examples of the signal processing method and the signal processor for detecting the rotation angle of the coupler 20 using the value of Ratio = (A-B + S) / (2S) include the sixth and seventh embodiments. Yes.

"S" is the gap reference coil at the median average value M of the signal value A measured from the one receiving coil 12 and the signal value B measured from the other receiving coil 14. It can be expressed as S = 2 (MC), which is the value obtained by subtracting the signal value C measured from (18) (MC), which is S = 2M-2C = A + B-2C = (AC) + It is possible to develop as (BC).

Therefore, the value of "S" is determined from the signal value A measured from the one receiving coil 12, the signal value B measured from the other receiving coil 14, and the gap reference coil 18. It is possible to implement and calculate the combination of the measured signal value (C).

As described above, since the value of "S" is calculated using the signal value C measured from the gap reference coil 18 as a reference line, when the rotation angle of the coupler 20 is calculated using the value of "S". In addition, correction for the gap occurring due to the positional change of the coupler 20 is made.

In the range -S≤ (AB) ≤S of the measured subtraction value AB, dividing each term by "S" may represent -1≤ ((AB) / S) ≤1, where VG is If used, it can be expressed as -0.5≤ ((AB) / (2S)) ≤0.5.

It is also possible to detect the angle (angle) at which the coupler 20 rotates from the value of Ratio = (A-B) / (2S) having a value between -0.5 and 0.5.

Examples of the signal processing method and the signal processor for detecting the rotation angle of the coupler 20 by using the ratio Ratio = (A-B) / (2S) correspond to the above-described fourth and fifth embodiments.

Then, substituting S = (AC) + (BC) for Ratio = (A-B + S) / (2S), Ratio = (A-B + A-C + BC) / (2S) = It can be represented by (2A-2C) / (2S) = (AC) / S.

It is also possible to detect the angle (angle) at which the coupler 20 rotates from the value of Ratio = (A-C) / S.

Examples of the signal processing method and the signal processor for detecting the rotation angle of the coupler 20 using the value of Ratio = (A-C) / S include the eighth and ninth embodiments.

In the above, a gap correction inductance angle sensor according to the present invention and a preferred embodiment of the signal processing method thereof have been described, but the present invention is not limited thereto, and various modifications are made within the scope of the claims and the specification and the accompanying drawings. It is possible to implement, and this also belongs to the scope of the present invention.

12,14-A pair of receive coils, 18-Gap reference coil, 20-Coupler, 30-Signal processor

Claims (11)

delete A pair of receiving coils formed and installed to have the same shape and area,
A gap reference coil disposed between or outside the pair of receiving coils;
An area corresponding to the area of the gap reference coil and the area of the one receiving coil or the area corresponding to the area of the one receiving coil is formed to enable forward / reverse rotation or linear movement in a state where the gap reference coil is always covered or opened. With coupler installed
Gap correction inductance method including a signal processor for receiving the signal values measured from the pair of receiving coils and the gap reference coil to calculate these signal values to correct the gap change of the coupler and output a signal value for the rotation angle of the coupler In the angle sensor,
When the coupler is formed by the sum of the area of the gap reference coil and the area of one of the receiving coils, the rotation range or the moving range is such that the coupler rotates forward or linearly while always covering the entire area of the gap reference coil. Gap correction inductance angle sensor for installation in restricted conditions. The method according to claim 2,
When the coupler is formed with an area corresponding to the area of one of the receiving coils, the coupler is installed in a state in which the rotation range or the movement range is limited so as to perform forward and reverse rotation or linear movement in a state where the entire area of the gap reference coil is always opened. Gap correction inductance angle sensor. The method according to claim 2,
The signal processor includes a measurement subtractor for outputting a measurement subtracted value by subtracting a signal value measured from another receiving coil from a signal value measured from one receiving coil of the pair of receiving coils, and measuring from the one receiving coil. A first gap correction subtractor which subtracts the signal value measured from the gap reference coil from the signal value to be output and outputs a first gap correction subtracted value, and measures the gap reference coil from the signal value measured from the other receiving coil A second gap correction subtractor for outputting a second gap correction subtractor by subtracting the signal value, and the first gap correction subtractor output from the first gap correction subtractor and the second gap correction subtractor outputted from the second gap correction subtractor A gap correction adder for adding a gap correction subtraction value to output a gap correction addition value, and the measurement subtraction output from the measurement subtractor; A gap correction inductance method comprising a multiplier for multiplying a value by a predetermined number and outputting a multiplier value and a divider for dividing a multiplier value output from the multiplier by the gap correction adder output from the gap correction adder and outputting a division value; Angle sensor. The method according to claim 2,
A measurement subtractor for outputting a measurement subtracted value by subtracting a signal value measured from another receiving coil from a signal value measured from one receiving coil of the pair of receiving coils, and a signal value measured from the one receiving coil A first gap correction subtractor for subtracting a signal value measured from the gap reference coil to output a first gap correction subtracted value, and a signal value measured from the gap reference coil from a signal value measured from the other receiving coil A second gap correction subtractor which subtracts to output a second gap correction subtractor, and the second gap correction subtractor output from the first gap correction subtractor and the second gap correction subtractor outputted from the first gap correction subtractor The gap correction adder that adds a value and outputs a gap correction addition value, and the gap correction to the measurement subtracted value output from the measurement subtractor. A second adder for outputting a second addition value by adding the gap correction addition value output from an adder, a drain for outputting a multiple value by multiplying the second addition value output from the second adder by a predetermined number, and the drainer And a divider for dividing a multiple value output from the divided by the gap correction adder output from the gap correction adder and outputting a division value. The method according to claim 2,
A first gap correction subtractor for subtracting a signal value measured from the gap reference coil from a signal value measured from the one receiving coil and outputting a first gap correction subtracting value, and a signal value measured from the other receiving coil A second gap correction subtractor for outputting a second gap correction subtraction value by subtracting a signal value measured from the gap reference coil from the first gap correction subtractor and the second gap correction subtractor output from the first gap correction subtractor; A gap correction adder outputting a gap correction addition value by adding the second gap correction subtraction value output from a correction subtractor, and a first gap correction subtraction value output from the first gap correction subtractor, the output from the gap correction adder. A gap correction inductance angle sensor comprising a divider for dividing the gap correction addition value and outputting a division value. The method according to any one of claims 4 to 6,
And a reference multiplier for multiplying the reference voltage before providing the dividing value output from the divider as an output value. An area obtained by adding the area of the gap reference coil and the area of the one receiving coil to a pair of receiving coils formed and installed to have the same shape and area and disposed between or outside the pair of receiving coils; A coupler formed by forming an area corresponding to an area of a receiving coil is measured from the gap reference coil and the pair of receiving coils as the coupler rotates forward or backward in a state of always covering or opening the gap reference coil. Receive the signal value,
A measurement subtraction value is obtained by subtracting a signal value measured from another receiving coil from a signal value measured from one receiving coil of the pair of receiving coils,
A first gap correction subtraction value is obtained by subtracting a signal value measured from the gap reference coil from a signal value measured from the one receiving coil;
A second gap correction subtraction value is obtained by subtracting the signal value measured from the gap reference coil from the signal value measured from the other receiving coil;
A gap correction addition value is obtained by adding the first gap correction subtraction value and the second gap correction subtraction value;
Multiplying the measured subtraction value by a certain number to obtain a multiple value,
And dividing the multiple value by the gap correction addition value to obtain a dividing value and providing the dividing value as an output value. An area obtained by adding the area of the gap reference coil and the area of the one receiving coil to a pair of receiving coils formed and installed to have the same shape and area and disposed between or outside the pair of receiving coils; A coupler formed by forming an area corresponding to an area of a receiving coil is measured from the gap reference coil and the pair of receiving coils as the coupler rotates forward or backward in a state of always covering or opening the gap reference coil. Receive the signal value,
A measurement subtraction value is obtained by subtracting a signal value measured from another receiving coil from a signal value measured from one receiving coil of the pair of receiving coils,
A first gap correction subtraction value is obtained by subtracting a signal value measured from the gap reference coil from a signal value measured from the one receiving coil;
A second gap correction subtraction value is obtained by subtracting the signal value measured from the gap reference coil from the signal value measured from the other receiving coil;
A gap correction addition value is obtained by adding the first gap correction subtraction value and the second gap correction subtraction value;
The gap addition value is added to the measured subtraction value to obtain a second addition value,
Multiplying the second addition value by a certain number to obtain a multiple value,
And dividing the multiple value by the gap correction addition value to obtain a dividing value and providing the dividing value as an output value. An area obtained by adding the area of the gap reference coil and the area of the one receiving coil to a pair of receiving coils formed and installed to have the same shape and area and disposed between or outside the pair of receiving coils; A coupler formed by forming an area corresponding to an area of a receiving coil is measured from the gap reference coil and the pair of receiving coils as the coupler rotates forward or backward in a state of always covering or opening the gap reference coil. Receive the signal value,
A first gap correction subtraction value is obtained by subtracting a signal value measured from the gap reference coil from a signal value measured from one receiving coil of the pair of receiving coils,
A second gap correction subtraction value is obtained by subtracting the signal value measured from the gap reference coil from the signal value measured from the other receiving coil;
A gap correction addition value is obtained by adding the first gap correction subtraction value and the second gap correction subtraction value;
And dividing the first gap correction subtraction value by the gap correction addition value to obtain a division value and providing it as an output value. The method according to any one of claims 8 to 10,
And a step of multiplying a reference voltage before providing the division value as an output value.

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