WO2019131295A1

WO2019131295A1 - Position detection device

Info

Publication number: WO2019131295A1
Application number: PCT/JP2018/046439
Authority: WO
Inventors: 佑貴須山; 佑樹菊井
Original assignee: 日本精機株式会社
Priority date: 2017-12-27
Filing date: 2018-12-18
Publication date: 2019-07-04
Also published as: JPWO2019131295A1; JP7238795B2

Abstract

Provided is a position detection device that can be configured so as to be compact and can be attached to a vehicle, or the like, with a high degree of freedom. This position detection device 100 comprises a body to be detected that moves linearly in conjunction with the operation of an operation part and a plurality of sensors IC32 for outputting detection signals when the body to be detected has approached and when the body to be detected has left. The plurality of sensors IC32 are arranged in a plurality of element rows 33 in each of which one or more sensors IC32 are aligned in the row direction. The plurality of sensors IC32 are arranged such that when the body to be detected moves along a direction orthogonal to the row direction from a first shift position A(E) to a second shift position B, C, D, the signals of three or more sensors IC32 from among the plurality of sensors IC32 switch between the detection signal for approaching and that for leaving. At the second shift position, the sensors IC32 of at least three adjacent element rows 33 output detection signals.

Description

Position detection device

The present invention relates to a position detection device.

As a conventional position detection device, there is one which detects the position of a moving object to be detected by using a magnetic field change of a magnet of the object to be detected. As a position detection device of this type, Patent Document 1 discloses a position sensor (position detection device) that detects a shift position in a shift device of a vehicle.

In the position sensor according to Patent Document 1, a magnet is provided on a detection subject (shift lever), and a magnetic detection element such as a Hall element is provided at a shift position of the detection subject.

JP, 2014-20922, A

In the position sensor disclosed in Patent Document 1, one or two magnetic detection elements are one element row, and a plurality of element rows are arranged substantially linearly, for example, for detection of five positions, 6 Since the element rows of the rows are arranged, the position sensor itself becomes large, and there is a problem that the degree of freedom of attachment to a vehicle or the like is reduced.

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a position detection device which can be configured compact and has a high degree of freedom of attachment to a vehicle or the like.

In order to achieve the above object, a position detection device according to the present invention is:
An object to be detected that moves linearly with an operation to the operation unit;
A position detection apparatus comprising: a plurality of detection elements that output an approach detection signal when the object to be detected approaches and output a separation detection signal when the object to be detected is separated,
In the plurality of detection elements, an element row in which one or more detection elements are arranged in the column direction is arranged over a plurality of rows, and the detection target is from the first position along the direction orthogonal to the column direction The plurality of detection elements are arranged such that the number of detection elements switched between the proximity detection signal and the separation detection signal is three or more among the plurality of detection elements when moving to the second position, At position 2, the proximity detection signal is output to the detection elements of the at least three element rows adjacent to each other,
It is characterized by

According to the present invention, it is possible to provide a position detection device which can be configured compactly and has a high degree of freedom of attachment to a vehicle or the like.

It is the schematic perspective view of the position detection apparatus which concerns on one Embodiment of this invention, and the schematic perspective view of a to-be-detected body. It is a schematic perspective view of a circuit board part. It is a top view of a circuit board. It is explanatory drawing of the relationship of a shift position and the detection of a detection element. It is a top view of the circuit board concerning other one embodiment. FIG. 10 is a plan view of a circuit board according to still another embodiment. It is a top view of the circuit board concerning other one embodiment.

A position detection device according to an embodiment of the present invention will be described with reference to the drawings.

A position detection device 100 according to an embodiment of the present invention is mounted on a vehicle, for example, as shown in FIG. 1, and detects a shift position accompanying a linear operation of an operation unit that switches a shift range of a transmission. A plurality of shift positions are provided, and for example, five shift positions A, B, C, D, and E are set, and the respective positions are detected.

The position detection apparatus 100 is provided with the to-be-detected body 10, the holder 20, the detection element 30, and the circuit board 40, as shown to FIG.

The to-be-detected body 10 has the magnet 11 and the magnet holding part 12.

The magnet holding portion 12 is made of, for example, a resin material having slidability and thermoplasticity such as polyacetal, polyamide, polytetrafluoroethylene or the like, and is formed into a rectangular solid or cubic outer shape. The magnet holding portion 12 is accommodated in the holder 20 so as to be linearly movable along the guide portion 21 of the holder 20. In the holder 20, a circuit board 40 on which the detection element 30 is mounted is disposed in parallel along the moving direction of the magnet holding unit 12. The holder 20 is formed of a resin material having the same slidability and thermoplasticity as the detection target 10.
The magnet 11 is held inside the magnet holder 12. The magnet 11 is formed in, for example, a cylindrical shape and magnetized in the radial direction. For example, the magnet 11 and the magnet holding portion 12 are integrally formed by insert molding.
The magnet 11 is, as shown in FIG. 3, second shift positions (second positions) B and C excluding first shift positions (first positions) A and E among five element rows described later. In the case of (D), it has a cylindrical shape of a size (diameter) capable of outputting a detection signal to all the detection elements 30 of the three element rows 33.

Further, in order to suppress the influence of the leakage flux due to the magnet 11 and the like in the element row 33 and the element row 34 of the detection element 30, the magnetic field is made as uniform as possible at all positions on the element row 33 and the element row 34 A detection element 30 is arranged. Here, the row is the XD direction in the figure, and the column is the YD direction. Further, as shown in FIG. 3, the distance between the element row 33 and the element row 34 of the detection element 30 is that the detection range at each shift position (detection position) A, B, C, D, E of the magnet 11 is a broken line. As indicated by the circles, the distance when moving from the first shift positions A and E to the adjacent second shift positions B, C and D is reduced by minimizing the amount of movement of the magnet 11.
Further, all detection elements 30 in one or three columns are arranged in three rows, and the detection elements 30 are positioned at the periphery of the detection range of the magnet 11 at each shift position. Make the change as uniform as possible.
That is, at the first shift position A, the detection element 30 in the first row is made to output at the rear of the operation direction, and at the first shift position E, it is output to the detection element 30 in the fifth row at the front of the operation direction. I am trying to In the second shift positions B, C, and D, all of the three rows of detection elements 30 are disposed at the periphery of the magnet 11 and output to all the detection elements 30. Thus, the position detection device 100 is made compact.

The magnet holding unit 12 is attached with an operation unit (not shown) that is held when performing a shift change operation. When the operation unit is linearly operated by the operation of the shift change, the magnet holding unit 12 holding the magnet 11 (that is, the object to be detected 10) is linearly moved to each shift position.
As a result, the detection subject 10 linearly moves the magnet 11 to each shift position with respect to the detection element 30 mounted on the circuit board 40 housed in the holder 20.

The circuit board 40 is formed of, for example, a printed circuit board in which various circuits are formed on a rigid board. As shown in FIG. 2, the circuit board 40 is formed in a rectangular shape such as a rectangular shape in a plan view. The detection element 30 includes, for example, a magnetic sensor 31, and is mounted on the front surface side of the circuit board 40 together with a protection circuit (not shown).

The magnetic sensor 31 outputs a detection signal (voltage signal) corresponding to the magnitude of the magnetic field formed by the magnet 11 to the control unit 50.
The magnetic sensor 31 is configured of, for example, a sensor IC (Integrated Circuit) 32 of one chip having a Hall element or a magnetoresistive element and a signal processing circuit.
In this embodiment, as shown in FIGS. 2 and 3, the sensor IC (magnetic sensor) 32 is composed of eight sensor ICs 32-1 to 32-8, and one or a plurality of sensor ICs 32 is one element. The row 33 includes five rows of elements 33-1 to 33-5, which are mounted on the circuit board 40 according to the five shift positions A, B, C, D, and E of the detection subject 10. The protection circuit is composed of a resistor, a capacitor, and a wiring pattern (not shown) formed on the circuit board 40, and protects the sensor IC 32 and the like from overcurrent and the like.
The arrangement of the five element rows 33 by eight sensor ICs 32 of the detection element 30 and the five shift positions A to E detected thereby, the outputs of at least three sensor ICs 32 for movement to adjacent shift positions Change the signal (Hamming distance 3).
The details of these will be described later.

The control unit 50 acquires detection signals from each of the sensor ICs 32-1 to 32-8 constituting the detection element 30, and based on the acquired detection signals, the position of the detection target 10 having the magnet 11, that is, the shift position To detect The control unit 50 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like, and includes a circuit board 40 and an electronic control unit (ECU) disposed in the vehicle, for example. It is connected conductively with Unit). The control unit 50 may be mounted on the back side of the circuit board 40.

The control unit 50 detects, for example, the position (shift position) of the detection subject 10 as follows.
A detection voltage corresponding to the position of the magnet 11 is output from each of the sensor ICs 32-1 to 32-8 constituting the detection element 30. These detected voltages are input to, for example, a comparator (not shown) and compared with a predetermined threshold voltage.
The sensor IC 32 outputs an on signal (1) to the control unit 50 when the detected voltage is higher than the threshold voltage Hi. That is, the sensor IC 32 that outputs the on signal (1) is turned on.
When the detected voltage is Lo smaller than the threshold voltage, an off signal (0) is output to the control unit 50. That is, the sensor IC that outputs the off signal (0) is turned off.
The control unit 50 is configured by associating the combination of the on state (1) or the off state (0) of each of the sensor ICs 32-1 to 32-8 with each of the shift positions A, B, C, D, and E. The stored table is stored in advance in the ROM, and the shift position A to E corresponding to the on signal (1) or the off signal (0) acquired from each of the sensor ICs 32-1 to 32-8 with reference to the table. Identify
Thus, the control unit 50 specifying the shift position gives an instruction according to the specified shift position to the vehicle side, and the shift range of the transmission of the vehicle is switched according to the instruction.

In this embodiment, the eight sensor ICs 32-1 to 32-8 constituting the detection element 30 are arranged in five element rows 33-1 to 33-5, as shown in FIG. A first row 33-1, a second row 33-2, a third row 33-3, a fourth row 33-4 and a fifth row 33-5 are arranged along the operation direction of the unit.
In addition, eight sensor ICs 32-1 to 32-8 are arranged in three rows 34 of a first row 34-1, a second row 34-2, and a third row 34-3 orthogonal to the column 33. .

Furthermore, as shown in FIG. 4, the eight sensor ICs 32-1 to 32-8 have two groups X and Y of X-1 to X-4 of group X and Y-5 to Y-8 of group Y. It is divided and arranged to belong to.
The two groups X and Y are configured such that the sensor IC 32 belonging to the first group X and the sensor IC 32 belonging to the second group Y receive power from different power supplies. As a result, even if the power supply for supplying power to the sensor IC 32 of one group fails, detection by the sensor IC 32 of the other group becomes possible, and the function of the position detection device 100 can be secured.
The relationship between the eight sensor ICs 32-1 to 32-8 and the sensor ICs X-1 to X-4 and Y-5 to Y-8 of the groups X and Y is that in the first group X, the second sensor IC 32 is used. -2 (= X-1), fourth sensor IC 32-4 (= X-2), fifth sensor IC 32-5 (= X-3), and eighth sensor IC 32-8 (= X-4) Belong to the second group Y, the first sensor IC 32-1 (= Y-5), the third sensor IC 32-3 (= Y-6), the sixth sensor IC 32-6 (= Y-7). And the seventh sensor IC 32-7 (= Y-8).
The second row 33-2 and the fourth row 33-4 are respectively one sensor IC 32 and Y-6 and Y-7 of the group Y, while the two sensor ICs 32 of the third row 33-3 Since both are group X's X-2 and X-3, it is necessary to determine which group's power supply has failed from changes in the operating status of the above two sensor ICs 32 in group X or group Y. Can.

Further, the sensor IC 32 belonging to the first group X among the plurality of sensor ICs 32 of the two groups X and Y outputs an ON signal with the detection signal (approach detection signal) as a Hi signal, and the detection signal (separation detection signal) Is output as the Lo signal, and the sensor IC 32 belonging to the second group Y among the plurality of sensor ICs 32 outputs the detection signal (approach detection signal) as the Lo signal and outputs the detection signal (separation detection signal) as the Hi signal. It is divided as follows. That is, the threshold values Hi and Lo of the detection signal are set reversely, and the four sensor ICs 32 (X-1 to X-4) belonging to the group X are turned on by the Hi signal when the magnet 11 is positioned. The four sensor ICs 32 (Y-5 to Y-8) belonging to the group Y output the ON signal by the Lo signal when the magnet is positioned. As a result, the control unit 50 can determine which one of the two groups X and Y the failure or the like of the sensor IC belongs to, thereby determining the failed sensor IC 32.

Next, the arrangement of the sensor ICs 32 constituting the detection element 30 will be specifically described.
(First column)
In the element column of the first column 33-1, two of the first sensor IC 32-1 and the second sensor IC 32-2 are arranged in a row direction orthogonal to the operation direction. The first sensor ICs 32-1 are arranged in the second row 34-2 and the second sensor ICs are arranged in the first row 34-1 in the element column of the first column 33-1. It is arranged in two lines. As shown in FIG. 3, the first row 34-1 and the second row 34-2 are disposed across the operation direction passing the center of the magnet 11.
Further, as shown in FIG. 4, the first sensor IC 32-1 belongs to group Y to constitute Y-5, and the second sensor IC 32-2 belongs to group X to constitute X-1 .

(Second column)
In the element column of the second column 33-2, one third sensor IC 32-3 is arranged in a row direction orthogonal to the operation direction. The third sensor IC 32-3 is arranged in the third row 34- of the third row, which is different from the two first sensor ICs 32-1 and the second sensor IC 32-2 in the element row of the first column 33-1. It is arranged in three. The third row 34-3, as shown in FIG. 3, is disposed at the outer edge (upper part in FIG. 3) orthogonal to the operation direction of the detection range of the magnet 11 so that the change of the magnetic field can be made uniform. It is.
The third sensor IC 32-3 belongs to the group Y and configures Y-6.

(3rd column)
In the element row of the third column 33-3, two of the fourth sensor IC 32-4 and the fifth sensor IC 32-5 are arranged in a row direction orthogonal to the operation direction. The fourth sensor IC 32-4 of the element column of the third column 33-3 is arranged in the second row 34-2 identical to the first sensor IC 32-1 of the first column 33-1, and the fifth sensor The ICs 32-5 are arranged in two rows by being arranged in the same first row 34-1 as the second sensor IC 32-2 in the first column 33-1.
Further, as shown in FIG. 4, the fourth sensor IC 32-4 belongs to the group X to constitute X-2, and the fifth sensor IC 32-5 also belongs to the group X to constitute X-3. .

(4th column)
In the fourth element row 33-4, one sixth sensor IC 32-6 is arranged in a row direction orthogonal to the operation direction. The sixth sensor IC 32-6 is different from the two first sensor ICs 32-1 and the second sensor IC 32-2 of the element row of the first row 33-1 in that the third sensor of the second row It is arranged in the 3rd line 34-3 of the 3rd line same as IC32-3.
The sixth sensor IC 32-6 belongs to the group Y and constitutes Y-7 as shown in FIG.

(5th column)
In the fifth element row 33-5, two seventh sensor ICs 32-7 and eighth sensor ICs 32-8 are arranged in a row direction orthogonal to the operation direction. The seventh sensor IC 32-7 is arranged in the second row 34-2 and the eighth sensor IC 32-8 is arranged in the first row 34-1 in the fifth element row 33-5. And are arranged in two lines.
Further, as shown in FIG. 4, the seventh sensor IC 32-7 belongs to group Y to constitute Y-8, and the eighth sensor IC 32-8 belongs to group X to constitute X-4. .

(Shift position A, E)
The detected object 10 provided with the magnet 11 causes the sensor IC 32 in the first row 33-1 to output a detection signal at the shift position A, which is the first position, as shown in FIG. That is, at the shift position A which is the first position, the two first sensor ICs 32-1 (Y-5) and the second sensor IC 32-2 (X-1) in the first row 33-1 are detected. Output a signal.
The first position is the same even in the shift position E, and the second seventh sensor IC 32-7 (Y-8) and the eighth sensor IC 32-8 (X) in the fifth row 33-5 are the same. -Output the detection signal to-4).

(Shift position B)
When moving from the first shift position to the second shift position, at the second shift positions B, C, D, detection signals are output to the sensor ICs 32 of the at least three element rows 33 adjacent to each other.
That is, at the second shift position B, detection signals are output to the five magnetic sensors 31 in the first row 33-1, the second row 33-2, and the third row 33-3. That is, the first sensor IC 32-1 (Y-5), the second sensor IC 32-2 (X-1), the third sensor IC 32-3 (Y-6), the fourth sensor IC 32-4 (X) -2) The detection signal is output to five rows of five sensor ICs 32 of the fifth sensor IC 32-5 (X-3).

(Shift position C)
At the second shift position C, detection signals are output to the sensor ICs 32 in the second row 33-2, the third row 33-3, and the fourth row 33-4, and the third sensor ICs 32-3 to A detection signal is output to four sensor ICs 32 of the sensor IC 32-6. That is, the third sensor IC 32-3 (Y-6), the fourth sensor IC 32-4 (X-2), the fifth sensor IC 32-5 (X-3), the sixth sensor IC 32-6 (Y The detection signal is output to four in three rows of -7).

(Shift position D)
In the second shift position D, the detection signal is output to the sensor IC 32 in the third row 33-3, the fourth row 33-4, and the fifth row 33-5, and the fourth sensor IC 32-4 to the eighth The detection signals are output to the five magnetic sensors 31 of the sensor IC 32-8. That is, the fourth sensor IC 32-4 (X-2), the fifth sensor IC 32-5 (X-3), the sixth sensor IC 32-6 (Y-7), the seventh sensor IC 32-7 (Y -8) The fifth sensor IC 32-8 (X-4) outputs a detection signal to five rows of five.

By arranging such a detection element 30 with eight sensor ICs 32-1 to 32-8 and arranging them in five element rows 33-1 to 33-5, the first shift positions A and E When moving to shift positions B, C, and D of 2, the number of sensor ICs 32 to which the detection signal switches among the plurality of sensor ICs 32 is three or more (the Hamming distance 3) or more.

Next, the relationship between the change to the adjacent shift position at each of the shift positions A to E and the output signal of the sensor IC 32 will be specifically described based on FIG. In FIG. 4, 1 to 4 in the horizontal row indicate the sensors IC X-1 to X-4 which are detection elements in group X, and 5 to 8 in the horizontal rows are detection elements in group Y. Sensor ICs Y-5 to Y-8 are shown. Moreover, in the group X, the case where the detection signal is 1 indicates that the detection state is on, and in the group Y, the case where the detection signal is 0 indicates that the detection state is on.

(From shift position A to B)
In the shift position A, the magnets 11 of the detection object 10 are located only on the first row 33-1, the sensor IC X-1 of the first row 33-1 is turned on (1), and the sensor IC Y-5 is It will be on (0).
When operated from this shift position A to B, the magnets 11 are positioned on the second row 33-2 and the third row 33-3 added to the first row 33-1.
As a result, the two sensor ICs X-2 and X-3 in the third row 33-3 change to ON (1), and the sensor IC Y-6 in the second row 33-2 changes to ON (0). .
Thereby, when the shift position A is operated to the adjacent shift position B, the three detection signals of the sensors IC X-2, X-3 and Y-6 change, and the shift position B can be detected.
When detecting this shift position B, the detection signals of the three sensor ICs 32 change, so that even if one of the three sensor ICs 32 fails, the remaining two sensor ICs 32 shift position B. It can be detected.

(From shift position B to C)
When the shift position B is operated from C to C, the magnets 11 are separated from the first row 33-1 and added to the second row 33-2 and the third row 33-3 to the fourth row 33-4. To position. Then, the sensor IC X-1 in the first row 33-1 is turned off (0), and the sensor IC Y-5 is turned off (1). Also, the sensor IC Y-7 in the fourth row 33-4 is turned on (0).
Thus, when the shift position B is operated to the adjacent shift position C, the detection signals of the three sensor ICs 32 of the sensors IC X-1, Y-5 and Y-7 change, and the shift position C is detected. Can. When detecting the shift position C, the detection signals of the three sensor ICs 32 change, so that even if one of the three sensor ICs 32 fails, the remaining two sensor ICs 32 shift position C. It can be detected.

(Shift position C to D)
When operated from this shift position C to D, the magnet 11 is separated from the second row 33-2 and is added to the third row 33-3 and the fourth row 33-4 to the fifth row 33-5. To position. Then, the sensor IC Y-6 in the second row 33-2 changes to OFF (1). Further, the sensor IC Y-8 in the fifth row 33-5 is turned on (0), and the sensor IC X-4 is turned on (1).
Thereby, when the shift position C is operated to the adjacent shift position D, the three detection signals of the sensors IC X-4, Y-6 and Y-8 change, and the shift position D can be detected. When detecting this shift position D, the detection signals of the three sensor ICs 32 change, so that even if one of the three sensor ICs 32 fails, the remaining two sensor ICs 32 shift position D. It can be detected.

(From shift position D to E)
When the shift position D is operated to the shift position E, the magnets 11 are separated from the third row 33-3 and the fourth row 33-4 and located only on the fifth row 33-5. Then, the sensor IC X-2 and X-3 in the third row 33-3 are turned off (0), and the sensor IC Y-7 in the fourth row 33-4 is turned off (1). Further, the sensor IC Y-8 in the fifth row 33-5 is turned on (0), and the sensor IC X-4 is turned on (1).
Thereby, when the shift position D is operated to the adjacent shift position E, the three detection signals of the sensors IC X-2, X-3 and Y-7 change, and the shift position E can be detected. At the time of detection of the shift position E, the detection signals of the three sensor ICs 32 change, so that even if one sensor IC 32 of the three sensor ICs 32 breaks down, the remaining two sensor ICs 32 shift Position E can be detected.
When the shift position E is operated in the reverse direction as the first shift position, the shift positions A to E can be similarly detected.
As described above, the position detection apparatus 100 can detect five shift positions A to E.

Next, a case where four shift positions are detected by the position detection apparatus 100 will be described.
In the detection of four shift positions, four shift positions A, B, C, D or shift positions can be obtained by not using shift positions A or E at both ends among the above-mentioned five shift positions A to E It can be detected as B, C, D, and E, and as shown in FIG. 4, four shift positions can be detected by changes in the three sensor ICs 32.
Also, as in the case of detection of five shift positions, even if one sensor IC 32 out of three sensor ICs 32 fails, the four remaining shift positions can be detected by the remaining two sensor ICs 32. it can.

When four shift positions are detected, as shown in FIG. 5, among the five shift positions A to E, shift positions A, B, D, and E excluding shift position C can be used.
In this case, the detection from the shift position A to B and from the shift position D to the shift position E is the same as in the case of FIG. 3 and FIG.
(Shift position B to D)
The magnet 11 is separated from the first row 33-1 and the second row 33-2 where the magnet 11 was located at the shift position B, and in addition to the third row 33-3, the fourth row 33-4 and the fifth row 33-4 The magnet 11 is located on the row 33-5. Then, the sensor IC X-1 in the first row 33-1 is turned off (0), and the sensor IC Y-5 is turned off (1). In addition, the sensor IC Y-6 in the second row 33-2 changes to OFF (1). Further, the sensor IC Y-7 in the fourth row 33-4 is turned on (0), the sensor IC Y-8 in the fifth row 33-5 is turned on (0), and the sensor IC X-4 is turned on (1) Change to
Thus, when the shift position B is operated to the adjacent shift position D, the six detection signals of the sensors IC X-1, X-4, Y-5, Y-6, Y-7 and Y-8 change. And the shift position D can be detected.
Also in this case, even if one sensor IC 32 of the six sensor ICs 32 fails, the shift position D is detected by the remaining five sensor ICs 32 by changing detection signals of the six sensor ICs 32. Can.
As described above, when detecting four shift positions by the position detection apparatus 100, in any case, the sensor IC 32 performs five element rows 33-1 to 5-6 as in the case of detecting five shift positions. At 33-5, four shift positions can be detected by using eight sensor ICs 32 of three element rows 34-1 to 34-3.

Next, the case where the position detection apparatus 100 detects three shift positions will be described.
When the three shift positions are the above shift positions A, B, C (or shift positions C, D, E), as shown in FIG. The three shift positions A, B and C (or shift positions C, D and E) can be detected by being configured by 33-4 (or element rows 33-2 to 33-5).
The relationship of the output signal of the sensor IC 32 by the movement of the shift position A, B, C (or the shift position C, D, E) to the adjacent shift position in this case is as described in FIG. The description is omitted.
Also in this case, even if one of the three sensor ICs 32 fails, the remaining two sensor ICs 32 detect each of the three shift positions by changing the detection signals of the three sensor ICs 32. can do.

Alternatively, three shift positions may be detected as shift positions A, C, and E. In this case, as shown in FIG. 7, the shift positions A, C, and E are independent of each other. It becomes the same as the case where sensor IC 32 is arranged.
Also in this case, the detection signals of the six sensor ICs 32 change as the sensor IC 32 operates from the shift position A to the shift position C or from the shift position C to the shift position E, so that, for example, six sensors IC 32 Even if one sensor IC 32 fails, the remaining five sensor ICs 32 can detect each of the three shift positions.

As described above, according to the embodiment, as specifically described, according to the position detection device 100, the detection object 10 moving linearly with the operation to the operation unit and the detection signal (when the detection object 10 approaches) A position detection apparatus 100 having a plurality of sensor ICs (detection elements) 32 outputting a proximity detection signal) and outputting a detection signal (separation detection signal) when the object 10 is separated, the plurality of sensors In the IC 32, a plurality of element rows 33 in which one or more sensor ICs 32 are arranged in the column direction are arranged over a plurality of rows, and the first shift position (position) A (a direction in which the detection object 10 is orthogonal to the column direction When moving from E) to the second shift position (position) B, C, D, the signal to be output is switched between the detection signal (approach detection signal) and the detection signal (separation detection signal) of the plurality of sensor ICs 32 The number of capacitors IC32 are arranged so that three or more, in the second shift position to output a detection signal (approach detection signal) to the sensor IC32 of at least three rows of the element array 33 adjacent to each other.
As a result, the shift positions are detected using detection signals of the sensor ICs 32 in three rows at the second shift positions B, C, D. Therefore, for example, five shift positions of the sensor IC 32 in the operation direction are five rows. Therefore, the size of the position detection device 100 in the operation direction can be made compact.
In addition, at least three detection signals of the sensor IC 32 can be changed and detected with the operation of the shift position (Hamming distance 3), and even if one sensor IC 32 breaks down, the remaining two shift positions Can be detected.
Further, since the sensor ICs 32 are arranged in three rows and / or the magnets 11 are arranged in a cylindrical shape so that the sensor ICs 32 are positioned on the outer peripheral edge, the influence of leakage magnetic flux or the like on the magnets 11 of the detection object 10 Therefore, the detection signal can be detected substantially uniformly, avoiding false detection, and detection accuracy can be enhanced.

(3 positions of shift position A, B, C or C, D, E are configured in 4 rows)
Further, according to the position detection apparatus 100, the first and second sensor ICs 32-1 and 32-2 are disposed as the sensor IC 32 in the first row 33-1 among the plurality of element rows 33, and the plurality of rows of The third sensor IC 32-3 is disposed as the sensor IC 32 in the second row 33-2 of the element row 33, and the fourth and fourth sensor ICs 32 are disposed in the third row 33-3 of the plurality of element rows 33. The fifth sensor IC 32-4, 32-5 are arranged, the sixth sensor IC 32-6 is arranged as the sensor IC 32 in the fourth row 33-4 of the plural element rows 33, and the detection subject 10 is When in the first shift position (A), detection signals (approach detection signals) are output from the first and second sensor ICs 32-1 and 32-2 arranged in the first row 33-1, and the second shift position First row when in B or C 3-1, the sensor ICs 32-1, 32-2, 32-3, 32-4, 32-5 or the second row 33-2, the third row arranged in the second row 33-2 and the third row 33-3 A detection signal (approach detection signal) is output from the sensor ICs 32-3, 32-2, 32-5, 32-6 arranged in the third column 33-4 and the fourth column 33-4.
As a result, three shift positions as shift positions A, B, C or shift positions C, D, E can be configured by the four element rows 33 to provide the position detection apparatus 100, and position detection in the operation direction The size of the device 100 can be made compact.
In addition, at least three detection signals of the sensor IC 32 can be changed and detected with the operation of the shift position (Hamming distance 3), and even if one sensor IC 32 breaks down, the remaining two shift positions Can be detected.

(5 stages of shift positions A, B, C, D, E are configured in 5 rows)
According to the position detection apparatus 100, the seventh and eighth sensor ICs 32-7 and 32-8 are disposed as the sensor IC 32 in the fifth row 33-5 among the plurality of element rows 33, and the detection object 10 is When in the second shift position (position) B, the detection signal (approach detection signal) is output from the sensor IC 32 arranged in the first row 33-1, the second row 33-2, and the third row 33-3. When in the third shift position (position) C adjacent to the second shift position B, the detection signal (approach detection from the sensor IC 32 arranged in the second row 33-2, the third row 33-3 and the fourth row 33-4 Signal, and when in the fourth shift position (position) D adjacent to the third shift position (position) C, the third row 33-3, the fourth row 33-4 and the fifth row 33-5 Output a detection signal (approach detection signal) from the sensor IC 32 And the detection signals from the seventh and eighth sensor ICs 32-7 and 32-8 arranged in the fifth row 33-5 when in the fifth shift position (position) E adjacent to the fourth shift position (position) D (Proximity detection signal) is output.
As a result, five shift positions as shift positions A, B, C, D, and E can be configured by the five element rows 33 to form the position detection device 100, and the size of the position detection device 100 in the operation direction Can be made compact.
In addition, at least three detection signals of the sensor IC 32 can be changed and detected with the operation of the shift position (Hamming distance 3), and even if one sensor IC 32 breaks down, the remaining two shift positions Can be detected.

(Consists of 4 rows of shift positions A, B, D and E in 5 rows)
According to the position detection apparatus 100, the sensor ICs 32 in the first to third rows 33-1 to 33-5 are arranged in the plurality of element rows 33, and the detection object 10 is at the first shift position (position). When it is in A, the detection signal (approach detection signal) is output from the sensor IC 32 arranged in the first row 33-1, and when it is in the second shift position (position) B adjacent to the first shift position (position) A The detection signal (approach detection signal) is output from the sensor IC 32 arranged in the first row 33-1, the second row 33-2, and the third row 33-3, and the third adjacent to the second shift position (position) B The detection signal (approach detection signal) is output from the sensor IC 32 arranged in the third row 33-3, the fourth row 33-4, and the fifth row 33-5 when in the shift position (position) D of Fourth shift position (position) adjacent to position (position) D When in the E causes the output detection signal (approach detection signal) from the sensor IC32 arranged in the fifth column 33-5.
Thus, four shift positions as shift positions A, B, D, and E can be configured by the five element rows 33 to be the position detection device 100, and the size of the position detection device 100 in the operation direction can be It can be made compact.
In addition, at least three detection signals of the sensor IC 32 can be changed and detected with the operation of the shift position (Hamming distance 3), and even if one sensor IC 32 breaks down, the remaining two shift positions Can be detected.

(Consists of 3 rows of shift positions B, C and D in 5 rows)
According to the position detection apparatus 100, the sensor ICs 32 in the first to third rows 33-1 to 33-5 are arranged in the plurality of element rows 33, and the detection object 10 is at the first shift position (position). When in B, the detection signal (approach detection signal) is output from the sensor IC 32 arranged in the first row 33-1, the second row 33-2 and the third row 33-3, and the first shift position (position) B When in the adjacent second shift position (position) C, a detection signal (approach detection signal) is output from the sensor IC 32 arranged in the second row 33-2, the third row 33-3 and the fourth row 33-4, When in the third shift position (position) D adjacent to the second shift position (position) C, detection is performed from the sensor IC 32 arranged in the third row 33-3, the fourth row 33-4 and the fifth row 33-5 A signal (approach detection signal) is output.
As a result, three shift positions as shift positions B, C, and D can be configured by the five element rows 33 to form the position detection device 100, and the size of the position detection device 100 in the operation direction can be made compact. can do.
In addition, at least three detection signals of the sensor IC 32 can be changed and detected with the operation of the shift position (Hamming distance 3), and even if one sensor IC 32 breaks down, the remaining two shift positions Can be detected.

According to the position detection device 100, the sensor IC 32 belonging to the first group X among the plurality of sensor ICs 32 outputs the detection signal (approach detection signal) as the Hi signal and outputs the detection signal (separation detection signal) as the Lo signal The sensor IC 32 belonging to the second group Y among the plurality of sensor ICs 32 outputs a detection signal (approach detection signal) as a Lo signal, and outputs a detection signal (separation detection signal) as a Hi signal.
As a result, by separating the sensor IC 32 into two groups X and Y, it is possible to determine which group of sensor ICs 32 is faulty using detection signals of the two sensor ICs 32.

According to the position detection device 100, the sensor IC 32 belonging to the first group X and the sensor IC 32 belonging to the second group Y receive power from different power sources.
By this, even if one power source fails, the detection of the shift position can be continued with the other power source.

According to the position detection device 100, in the first group X, the second sensor IC X-1, the fourth sensor IC X-2, the fifth sensor IC X-3, and the eighth sensor IC X-4 The first sensor IC Y-5, the third sensor IC Y-6, the sixth sensor IC Y-7, and the seventh sensor IC Y-8 belong to the second group Y.
A sensor in which detection of each shift position of three shift positions from five shift positions is compactly arranged by arranging the sensor ICs 32 belonging to such two groups X and Y as first to eighth sensor ICs respectively It can be detected by the IC 32, and at the same time, the detection signal of the sensor IC 32 can be changed and detected (Hamming distance 3) according to the operation of the shift position, and even if one sensor IC 32 breaks down, it remains The shift position can be detected by the following two.

The present invention is not limited by the above embodiment and the drawings. Changes (including deletion of components) can be made as appropriate without departing from the scope of the present invention, and the respective inventions can be arbitrarily combined.

In the above embodiments, the case where a magnet and a sensor IC including a magnetic sensor are used as a detection element is described as an example, but an optical detection element including a light source and an optical sensor can also be used. For example, the detection elements are not limited to these.

The position detection apparatus 100 is not limited to the application for detecting the shift position, as long as the position detection apparatus 100 can detect the position of the detection object 10 using a detection signal that changes as the detection object 10 moves. Can be applied to position detection for various applications.

The present invention is applicable to a shift position sensor for a vehicle.

DESCRIPTION OF SYMBOLS 100 ... Position detection apparatus 10 ... Detection object 11 ... Magnet 12 ... Magnet holding part 20 ... Holder 21 ... Guide part 30 ... Detection element 31 ... Magnetic sensor 32 ... Sensor IC (32-1 to 32-8)
33 ... element row 33-1 ... first row (element row)
33-2 ... 2nd column (element array)
33-3 ... 3rd row (element row)
33-4 ... 4th column (element array)
33-5 ... 5th column (element array)
34 ... Element row (34-1 to 34-3)
40 ... circuit board 50 ... control unit A ... shift position (position)
B: Shift position (position)
C: Shift position (position)
D: Shift position (position)
E: Shift position (position)
X: First group (X-1 to X-4)
Y: second group (Y-5 to Y-8)

Claims

An object to be detected that moves linearly with an operation to the operation unit;
A position detection apparatus comprising: a plurality of detection elements that output an approach detection signal when the object to be detected approaches and output a separation detection signal when the object to be detected is separated,
In the plurality of detection elements, an element row in which one or more detection elements are arranged in the column direction is arranged over a plurality of rows, and the detection target is from the first position along the direction orthogonal to the column direction The plurality of detection elements are arranged such that the number of detection elements switched between the proximity detection signal and the separation detection signal is three or more among the plurality of detection elements when moving to the second position, At position 2, the proximity detection signal is output to the detection elements of the at least three element rows adjacent to each other,
A position detection device characterized by
First and second detection elements are disposed as the detection elements in the first line among the plurality of lines.
A third detection element is disposed as the detection element in the second line among the plurality of lines.
Fourth and fifth detection elements are disposed as the detection elements in the third line among the plurality of lines.
A sixth detection element is disposed as the detection element in the fourth line among the plurality of lines.
The object to be detected causes the proximity detection signal to be output from the first and second detection elements arranged in the first row when in the first position (A), and the second position (B or C) Output the proximity detection signal from the detection elements arranged in the first column, the second column and the third column or the detection elements arranged in the second column, the third column and the fourth column Let
The position detection device according to claim 1,
Seventh and eighth detection elements are disposed as the detection elements in the fifth line among the plurality of lines.
When the object to be detected is at the second position (B), the proximity detection signal is output from the detection elements arranged in the first row, the second row, and the third row, and the second position (B) causes the proximity detection signal to be output from the detection elements arranged in the second row, the third row, and the fourth row when in the third position (C) adjacent to (B); C) causing the proximity detection signal to be output from the detection elements arranged in the third row, the fourth row and the fifth row when in the fourth position (D) adjacent to the C), and the fourth position (D And the seventh and eighth detection elements arranged in the fifth column output the proximity detection signal when the fifth position (E) is adjacent to
The position detection device according to claim 2, characterized in that:
In the plurality of element rows, the detection elements of the first to fifth lines are disposed.
The object to be detected causes the proximity detection signal to be output from the detection elements arranged in the first row when in the first position (A), and the second position adjacent to the first position (A) When in (B), the proximity detection signal is output from the detection elements arranged in the first column, the second column and the third column, and a third position (adjacent to the second position (B) When in D), the proximity detection signal is output from the detection elements arranged in the third row, the fourth row, and the fifth row, and a fourth position (E) adjacent to the third position (D) And the proximity detection signal is output from the detection elements arranged in the fifth row,
The position detection device according to claim 3, characterized in that:
In the plurality of element rows, the detection elements of the first to fifth lines are disposed.
The object to be detected causes the proximity detection signal to be output from the detection elements arranged in the first row, the second row, and the third row when in the first position (B), and the first position (B) causes the proximity detection signal to be output from the detection elements arranged in the second row, the third row, and the fourth row when in the second position (C) adjacent to the second position (C); C) causing the proximity detection signal to be output from the detection elements arranged in the third row, the fourth row and the fifth row when in the third position (D) adjacent to C)
The position detection device according to claim 3, characterized in that:
The detection elements belonging to the first group among the plurality of detection elements output the proximity detection signal as a Hi signal, and output the separation detection signal as a Lo signal,
The detection elements belonging to the second group among the plurality of detection elements output the approach detection signal as a Lo signal and output the separation detection signal as a Hi signal.
The position detection device according to any one of claims 1 to 5, characterized in that:
The detection elements belonging to the first group and the detection elements belonging to the second group respectively receive power from different power supplies,
The position detection apparatus according to claim 6,
The second detection element, the fourth detection element, the fifth detection element and the eighth detection element belong to the first group,
The first detection element, the third detection element, the sixth detection element, and the seventh detection element belong to the second group.
The position detection device according to claim 6 or 7, characterized in that: