MX2014006738A - Non-contact rotation angle detection device, manufacturing method therefor and throttle valve control apparatus. - Google Patents
Non-contact rotation angle detection device, manufacturing method therefor and throttle valve control apparatus.Info
- Publication number
- MX2014006738A MX2014006738A MX2014006738A MX2014006738A MX2014006738A MX 2014006738 A MX2014006738 A MX 2014006738A MX 2014006738 A MX2014006738 A MX 2014006738A MX 2014006738 A MX2014006738 A MX 2014006738A MX 2014006738 A MX2014006738 A MX 2014006738A
- Authority
- MX
- Mexico
- Prior art keywords
- cavity
- resin
- resin member
- magnetic sensor
- rotation angle
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/106—Detection of demand or actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/105—Details of the valve housing having a throttle position sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1075—Materials, e.g. composites
- F02D9/108—Plastics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
In order to achieve small variations in detection accuracy among individual non-contact rotation angle detection devices even under a temperature environment near -40 degrees, provided are a non-contact rotation angle detection device, a manufacturing method therefor, and a throttle valve control apparatus using the same, the non-contact rotation angle detection device being provided with at least a stator (110), a Hall IC (120A) disposed in a cavity (110S) of the stator (110) and provided with a magneto-sensitive part, a circuit board (130) connected to the Hall IC (120A), a casing (140) provided with a holding part (140H) that holds the stator (110) and a housing part (140S) that communicates with the cavity (110S) and houses the circuit board (130), and a resin member (150A) filled into the cavity (110S) and into the housing part (140S) so as to surround the hall IC (120A) and the circuit board (130), the glass-transition temperature of a resin member (152A) that surrounds at least the magneto-sensitive part in the resin member (150A) being -40 degrees or lower.
Description
ANGLE SWITCH DETECTION DEVICE WITHOUT
CONTACT, MANUFACTURING METHOD FOR THE SAME. Y
CONTROL VALVE CONTROL APPARATUS
Field of the Invention
The present invention relates to a non-contacting rotation angle sensing device, to a manufacturing method therefor, and to a throttle control apparatus.
Background of the Invention
In an electronically controlled throttle control apparatus for controlling an inlet air quantity of an engine, a non-contacting twist angle detection device is provided for detecting a turning angle of a throttle valve (hereinafter abbreviated) as "turning angle detection sensor" in some cases). With this angle-of-turn detection sensor, a rotation angle of a rotor is detected based on a magnetic field generated between a pair of magnets attached at one end of a shaft-shaped rotor to rotate the throttle valve so which are opposite each other with an axis of rotation of the rotor between them with respect to the axis of rotation of the rotor by using a magnetic sensor element provided with a portion sensitive to the magnet (hereinafter abbreviated as "Hall IC") in some cases).
In such angle detection sensor, it is proposed
a technology to isolate a space in which the magnet sensitive portion of Hall IC or Hall IC is placed by means of a resin member (see Patent Litter 1 and 2) or to isolate the terminal group of Hall IC by medium of a thermosetting resin (see Patent Literature 3). If such a configuration is employed, with the technology described in Patent Literature 1, by releasing a voltage applied to the magnet-sensitive portion while the magnet sensitive portion is protected against condensation and migration, deterioration of the integrity of the magnet can be prevented or reduced. the characteristics of the sensor caused by the tension. On the other hand, with the technology described in Patent Literature 2, in addition to the suppression of adhesion of grease, foreign substances and the like, the suppression of the short circuit between the Hall IC terminals, the prevention of Hall deviation IC caused by vibration and the like, when a resin deformation stress caused by a thermal change when the resin hardens acts in Hall IC, the Hall itself deforms and absorbs this tension, a Hall IC change can be suppressed. On the other hand, with the technology described in Patent Literature 3, a change in coefficient of linear expansion of an isolated internal component by means of thermosetting resin, can be minimized, and consequently, the characteristics of the output change of the Hall IC with respect to the angle of rotation of the magnet, and variation in the accuracy of the magnet can be suppressed.
detection between devices.
Appointment list
Patent Literature
Patent Literature 1: Japanese Patent Number Open to Public Consultation 2005106781 (claim 1, paragraph 0005)
Patent Literature 2: Japanese Patent Number 4695929 (claim 1, paragraphs 0015, 0099-0101 and the like)
Patent Literature 3: Japanese Patent Number Open to Public Consultation 200864737 (claim 3, 4, paragraph 0014 and the like)
Brief Description of the Invention
Technical problem
Such a non-contacting angle-of-turn detecting device requires use in a temperature range of -40 to 120 degrees and thus, the variation in detection accuracy between the individual devices is preferably small over the entire region of such temperature regions. . On the other hand, since an output of the Hall IC varies depending on the temperature, the output correction is made in an IC circuit that constitutes the Hall IC. However, a resin loses its flexibility at a low temperature or particularly below a glass transition temperature and becomes extremely hard.
And when the resin isolates the Hall IC and its sensitive portion
magnet loses flexibility, a strain of intense deformation is applied to Hall IC and its sensitive portion to the magnet and thus, the variation in the detection accuracy may be large in some cases. And it is difficult to suppress such variation in detection accuracy only by means of the correction of the Hall IC output itself. In this case, production in the manufacture of the non-contacting angle-of-turn detection device is decreased.
The present invention was carried out considering the above circumstances and has the objective of providing a non-contacting angle of turn detection device with a small variation in the detection accuracy between the individual elements even under a temperature environment of about -40 degrees, a manufacturing method therefor, and a throttle control apparatus using the non-contacting angle of turn detection device.
Solution to the problem
The above objective is achieved by means of the present invention described below. That is to say,
A non-contacting rotation angle sensing device of the present invention includes at least one stator provided with a cavity, a magnetic sensor element positioned in the cavity, provided with a portion sensitive to the magnet and detecting a magnetic flux change by rotating a rotor, a circuit board electrically connected to the magnetic sensor element, a housing
provided with a holding portion for holding the stator and a housing portion communicating with the stator cavity held by the holding portion and also housing the circuit board, and a resin member applied to the cavity and portion of housing for surrounding the magnetic sensor element and the circuit board, characterized in that, in the resin member, a glass transition temperature of the resin member that at least surrounds the magnet-sensitive portion is -40 degrees or less .
One aspect of the non-contacting rotation angle detection device of the present invention, in the resin member, the resin member applied in the cavity to encircle at least the magnet sensitive portion, is preferably made of a urethane resin .
In another aspect of the non-contacting rotation angle detection device of the present invention, such as the resin member applied to the cavity and the housing portion for surrounding the magnetic sensor element and the circuit board, an epoxy resin is used. and a urethane resin, and the resin member applied to the cavity to encircle at least the magnet sensitive portion is preferably made of urethane resin.
In another aspect of the non-contacting rotation angle detection device of the present invention, the resin member applied in the cavity and in the housing portion for encircling
The magnetic sensor element and circuit board is made of urethane resin.
In another aspect of the non-contacting rotation angle detection device of the present invention, it is preferable that the magnetic sensor element has a portion of the element body in which the magnet sensitive portion and a sensor IC are integrally formed, and the resin member applied in the cavity and in the housing portion to surround the magnetic sensor element and the circuit board, the glass transition temperature of the resin member surrounding at least the element body portion is -40 degrees or less.
A first manufacturing method for a non-contacting rotation angle sensing device of the present invention is characterized by a non-contacting rotation angle sensing device of the present invention manufactured by at least passing through a process of application of unhardened resin material to apply a resin material in an unhardened state, whose vitreous transition temperature in a hardened state is -40 degrees or less, to at least one cavity of a housing provided with a stator provided with the cavity, a holding portion for holding the stator, and a housing portion which communicates with the stator cavity fastened by means of the holding portion and which also houses a circuit board, a magnetic sensor element placement process for placing an element of
magnetic sensor in the cavity filled with the resin material in the unhardened state to encircle at least a magnet-sensitive portion of the magnetic sensor element provided with the magnet-sensitive portion and detecting a magnetic flux that changes by means of rotation of the magnet. a rotor by means of the resin material in the unhardened state, and a hardening process for hardening the resin material in the unhardened state.
A second manufacturing method for a non-contacting angle-of-sight detection device of the present invention is characterized in that a non-contacting angle-of-turn detecting device of the present invention is manufactured by at least passing through a process of immersion to encircle at least a magnet-sensitive portion of a magnetic sensor element provided with the magnet sensitive portion and detecting a magnetic flux that changes by rotating a rotor by a resin material in an unhardened state, whose vitreous transition temperature in a hardened state is 40 degrees or less, a process of positioning magnetic sensor element for positioning the magnetic sensor element, in which the magnet sensitive portion is surrounded by the resin material in the non-hardening state in at least one cavity of a housing provided with a stator provided with the cavity, a portion clamp to hold the stator, and a portion of housing that communicates
with the stator cavity held by the holding portion and also housing a circuit board, and a hardening process for hardening the resin material in the unhardened state.
A throttle control apparatus of the present invention characterized by having at least one throttle body provided with at least one inlet passage, a shaft-shaped rotor provided for crossing a radial direction of the inlet passage and to penetrate the inlet passage, a throttle valve fixed to the rotor and rotatably mounted in the inlet passage, and a pair of magnets mounted at one end of the rotor that are opposite each other, which have a rotational axis of the rotor between them; and a non-contacting rotation angle sensing device of the present invention mounted to the throttle body to position the stator between the pair of magnets.
Advantageous effects of the invention
In accordance with the present invention, a non-contacting rotation angle detection device with a small variation in detection accuracy between the individual elements can be provided even under a temperature environment of about -40 degrees, a manufacturing method for the and a regulating valve control apparatus using the non-contacting angle of turn detection device.
Brief Description of the Drawings
Figure 1 is a perspective view of the schematic illustrating an example of a regulating valve control apparatus of this embodiment.
Figure 2 is a schematic view of a section illustrating an example of a non-contacting rotation angle detection device of this embodiment.
Figure 3 is a schematic diagram illustrating an example of a magnetic sensor element (Hall IC type separation) that can be used in the non-contacting rotation angle detection device of this embodiment.
Figure 4 is a schematic view of a section illustrating another example of the non-contacting rotation angle detection device of this embodiment.
Figures 5A-5B are schematic views of a section explaining a filling process with unhardened resin material in a first manufacturing method for the non-contact turning angle detection device of this embodiment. Here, Figure 5A is a diagram illustrating a state in which an unhardened resin material is applied in a cavity of a stator, and Figure 5B is a diagram illustrating a state in which the unhardened resin material it is applied in the cavity and in a housing portion.
Figures 6A-6B are schematic views of a section explaining a process of placing magnetic sensor element in the first manufacturing method for the device
of non-contact angle of rotation detection of this mode. Here, Figure 6A is a diagram illustrating a state in which, in the stator cavity, a main part of an element body portion of a Hall IC is inserted into the unhardened resin material, and Figure 6B is a diagram illustrating a state in which, in the cavity and in the housing portion, the Hall IC and a circuit board are inserted into the unhardened resin material.
Figure 7 is a schematic view of a section explaining a process performed in the state illustrated in Figure 6A and then in the first manufacturing method for the non-contacting rotation angle detection device of this embodiment.
Figure 8 is a schematic view of a section explaining an immersion process in a second manufacturing method for the non-contacting rotation angle detection device of this embodiment.
Detailed description of the invention
Figure 1 is a perspective view of the schematic illustrating an example of a regulating valve control apparatus of this embodiment. On the other hand, Figure 2 is a schematic view of a section illustrating an example of a non-contacting angle detecting device of this embodiment and specifically, it is an enlarged view that mainly illustrates a main part of the angle detecting device. contactless rotation in the valve control apparatus
regulator illustrated in figure 1.
A throttle control apparatus 10 illustrated in Fig. 1 includes a throttle body 20 and a non-contact twist angle detection device (rotation angle sensing sensor 100A (100)). Here, the throttle body 20 includes a hollow cylindrical inlet passage 22, a shaft-shaped rotor (throttle shaft 24) provided to cross a radial direction of the inlet passage 22 and to penetrate the inlet passage 22, a regulating valve 26 fixed to the throttle shaft 24 and mounted rotatably in the inlet passage 22, a pair of magnets 28 attached at one end of the throttle shaft 24 to be opposite, having a rotational axis A of the regulator valve shaft 24 between them and the like. On the other hand, the rotation angle sensing sensor 100 is attached to the throttle body 20 to place a stator 110 constituting the rotation angle detection sensor 100 between the pair of magnets 28. In the example illustrated in FIG. 2, the pair of magnets 28 is fixed to a surface on a side opposite a side connected to the throttle shaft 24 of a plate-shaped gear 30 mounted on one end of the throttle shaft 24.
Here, the rotation angle sensing sensor 100A illustrated in FIG. 2 includes the stator 110 provided with a cavity 110S, a magnetic sensor element (Hall IC 120A (120)) positioned in the cavity 110S, provided with a
a portion sensitive to the magnet, and detecting a magnetic flux that changes by means of the rotation of the throttle shaft 24, a circuit board 130 electrically connected to the Hall IC 120A, a housing 140 provided with a holding portion 140H that holds the stator 110 and a housing portion 140S communicating with the cavity 110S of the stator 110 clamped by means of the holding portion 140H and housing the circuit board 130, a resin member 150A (150) applied to the cavity 110S and the housing portion 140S to encircle Hall IC 120A and circuit board 130 and the like. The cover 140 is formed, for example, of a polybutylene terephthalate thermoplastic resin (PBT), a polyphenylene sulfide thermoplastic resin (PPS) and the like. On the other hand, in the rotation angle sensing sensor 100A, a protective plate made of metal can be attached as necessary to cover a surface of the resin member 150A applied to the housing portion 140S.
Here, the Hall IC 120A illustrated in Figure 2 is a Hall IC integral type having an element body portion 122 in which the magnet sensitive portion and an IC sensor are integrally formed, and a terminal 124 is attached to the element body portion 122. The Hall IC 120A is electrically connected to the circuit board 130 through the terminal 124. Since the Hall IC 120 is used in the sensing angle sensor
turn 100 in this embodiment, instead of Hall IC 120A exemplified in Figure 2, a separation IC IC 120B (120) can also be used as exemplified in Figure 3 in which a sensitive portion to the 126A magnet and an IC sensor 126B are provided separately. The Hall IC 120B illustrated in Figure 3 has the magnet sensitive portion 126A, the IC sensor 126B, a connecting 126C connecting the magnet sensitive portion 126A and the IC sensor 126B, and the terminal 124 connected to the IC sensor 126B. Here, a portion composed of the magnet sensitive portion 126A, the IC sensor 126B, and the connecting 126C is a portion having a function corresponding to the element body portion 122 of the Hall IC 120A illustrated in Figure 2 .
In the throttle control apparatus 10 illustrated in Fig. 1, the opening / closing of the throttle valve 26 that controls a quantity of air from an inlet air flowing through the inlet passage 22 is performed as follows. First, according to a degree of inction of an accelerator pedal, a control signal emitted from the control means, not shown, as a motor control unit or the like is transmitted to a motor, not shown, placed in the regulator valve body 20, and the motor is driven / controlled. By means of this motor, a driving force is transmitted to the throttle shaft 24 through the power transmission means such as a gear 30 and the like, and the throttle valve
26 opens / closes. At this time, the opening / closing degree of the regulating valve 26 is detected by means of the rotation angle detection sensor 100 as a turning angle of the throttle shaft 24. That is, with the rotation of the valve shaft. Regulator 24, when the pair of magnets 28 rotates, an address of a magnetic field that crosses the element body portion 122 changes according to the angle of rotation. Consequently, an output signal from Hall IC 120A is changed. In the control means to which this output signal is sent, an angle of rotation of the throttle shaft 24, ie, an opening degree of the throttle valve 26 is calculated based on the output signal. Then, the correction control of the opening degree of the throttle valve 26 is executed by the control means based on the degree of aperture detected above and in other detection signals such as a number of rotations of the motor and the like.
Here, in the rotation angle sensing sensor 100A illustrated in FIG. 2, in the resin member 150A, which with a glass transition temperature at -40 degrees or less is used as a resin member 152A surrounding thereby minus the element body portion 122. In this case, the magnet-sensitive portion that constitutes a part of the element body portion 122 is surrounded by the resin member whose vitreous transition temperature is substantially -40 degrees or less . On the other hand, if the Hall IC type separation 120B
exemplified in figure 3 is used instead of the integral type IC Hall 120A exemplified in figure 2, as exemplified in figure 4, in the resin member 150B (150), it is only necessary that the glass transition temperature of a resin member 152B surrounding at least the magnet sensitive portion 126A, is -40 degrees or less. Here, the rotation angle sensing sensor 100B (100) illustrated in FIG. 4 and the rotation angle detection sensor 100A illustrated in FIG. 2 have substantially the same configuration as that of the rotation angle detection sensor 100A. illustrated in Figure 2 except that the Hall IC type separation 120B exemplified in Figure 3 is used in place of the Hall IC integral type 120A.
In this case, even at about -40 degrees which is the lower limit value of a range of use temperatures of the rotation angle detection sensor 100, the resin member 152A surrounding the element body portion 122 does not lose flexibility. illustrated in Figure 2 and the resin member 152B surrounding the magnet sensitive portion 126A illustrated in Figure 4. Thus, since a strain strain involved in the loss of flexibility of the resin member 152A does not apply to the portion of element body 122 in which the magnet-sensitive portion is formed integrally, the variation in detection accuracy between the individual elements of the rotation angle sensing sensor 100A can be suppressed. This point also applies to the angle-of-turn detection sensor
100B illustrated in Figure 4. Moreover, since the element body portion 122 is surrounded by the resin member 152A applied to the cavity 110S and the magnet sensitive portion 126A is surrounded by the resin member 152B applied to the cavity 110S, the change of the Hall IC 120A and 120B is prevented, and the resistance to vibration can also be improved
Here, as the resin members 152A and 152B, a known resin member can be used as long as the glass transition temperature is -40 degrees or less, but specifically, a urethane resin, a silicone resin, a fluorinated elastomer can be exemplified. liquid and the like. However, from the point of view of feasibility, cost, and the like, urethane resin is most preferred among these resin members. The lower limit values of the vitreous transition temperatures of the resin members 152A and 152B are not particularly limited as long as they are -40 degrees or less, but from the practical point of view such as the ease in obtaining the material and the like and from the point of view of suppressing the decrease of a use temperature on a high temperature side, they are preferably -60 degrees or greater.
On the other hand, as a resin member 154A occupying a portion other than the resin member 152A in the resin member 150A, the same resin member as the resin member 152A can be used and a different member of the resin member 152A can be used.
resin. As the resin member 154A, if the same resin member is used as the resin member 152A, a production process of the rotation angle detection sensor 100A can be simplified more easily. On the other hand, if a resin member other than the resin member 152A is used as the resin member 154A, an epoxy resin is preferably used which is excellent in hardness, moisture resistance, heat resistance, chemical resistance and the like. Accordingly, the circuit board 130 and the Hall IC 120A can be reliably protected against adhesion of moisture, heat, grease, foreign substances and the like, a voltage applied from the outside of the rotation angle sensing sensor 100A and the like.
The urethane resin conveniently used as the resin member 152A is generally deficient in moisture resistance and since it has adhesion, the foreign substances can easily adhere and on the other hand, its hardness is low and the mechanical durability tends to be poor. Therefore, if the complete resin member 150A is formed, that is, both the resin member 152A and the resin member 154A are formed from urethane resin, the yields may become insufficient in terms of resistance to moisture, adhesion of foreign substances or mechanical durability. On the other hand, if the urethane resin is applied to the cavity 110S and to the housing portion 140S to the
using a liquid curable urethane resin under atmospheric pressure such as resin member 150A, whereby air bubbles can easily remain in a urethane resin matrix, and the traces of the air bubbles are generated for that reason on the surface of the urethane resin matrix. Thus, an appearance of the 100A rotation angle sensing sensor may be damaged. However, by using the urethane resin as the resin member 152A and by using the epoxy resin as the resin member 154A, the problems described above can be avoided, while the variation in the detection accuracy between the individual elements of the sensor 100A turn angle detection can be suppressed at the same time.
The points described above also apply to the resin member 154B which occupies the distinct portion of the resin member 152B in the resin member 150B. On the other hand, the glass transition temperatures of the resin members 154A and 154B are not particularly limited.
Here, since the urethane resin was conveniently used as the resin members 152A and 152B, commercially available products can be used and can be cited MU-115A / MU-115B (from Pelnox Limited, vitrea transition temperature: -50 degrees) , MU-102A / MU-102B (from Pelnox Limited, vitrea transition temperature: -55 degrees), UE-921A / UE-921B (from Sanyu Rec Co., Ltd., transition temperature
vitrea: -55 degrees), SU-1727A / SU-1727B (from Sanyu Rec Co., Ltd., vitrea transition temperature: -55 degrees), UF1113A / UF-1113B (from Sanyu Rec Co., Ltd., temperature glass transition: -50 degrees), SU-3600A / SU-3600B (from Sanyu Rec Co., Ltd., vitrea transition temperature: -56 degrees), SU 3001 A / SU -3001 B (from Sanyu Rec Co. , Ltd., glass transition temperature: -50 degrees) and the like.
Among the commercially available products listed above, MU-115A / MU-115B are also excellent in moisture resistance and the like, and thus, can be used not only as the resin members 152A and 152B but can also be easily used as the members of resin 154A and 154B. Therefore, if the urethane resin excellent in moisture resistance and similar as described above is used not only as the resin members 152A and 152B but also as the resin members 154A and 154B, the production process can be simplified Additionally. In addition to the above, although the urethane resin is more deficient than the epoxy resin in hardness, it is rich in flexibility. Thus, even if the thermal expansion / thermal contraction of the housing 140 occurs due to the exposure of the rotation angle detection sensor 100 to a noticeable temperature change, it is attended to, and the occurrence of a separation can be easily and reliably suppressed. between the resin members 150A and 150B and the housing 140.
Subsequently, a manufacturing method for the rotation angle detection sensor 100 of this embodiment will be described. Figures 5 to 7 are schematic diagrams of a section explaining the manufacturing method for the rotation angle detection sensor 100 of a first embodiment, and specifically, they are diagrams explaining an example of the manufacturing method for the detection sensor of rotation angle 100A illustrated in figure 2.
In the manufacture of the 100A rotation angle sensing sensor, a filling process with unhardened resin material is first performed to apply a resin material in an unhardened state (unhardened resin material 200A (200)). ) whose vitreous transition temperature in a hardened state is -40 degrees or less in at least the cavity 110S of the housing 140 using a dispenser or the like (Figure 5).
In the process of filling with unhardened resin material, as illustrated in Figure 5A, the unhardened resin material 200A can be applied only in the cavity 110S or the unhardened resin material 200A can be applied in the cavity 110S and in the housing portion 140S in Figure 5B. The previous filling method (filling method divided into two parts) is convenient if the resin member 152A and the resin member 154A are different resin members, while the latter filling method (filling method)
single) is convenient if the resin member 152A and the resin member 154A are the same resin member. If the unhardened resin material 200A is a hardenable type of 2 liquids, the filler is made after the 2 liquids are mixed.
Subsequently, at least the element body portion 122 of the Hall IC 120A is placed in the cavity 110S in which the unhardened resin material 200A is applied to be surrounded by the unhardened material 200A magnetic sensor, figure 6). At this time, if the filling process with unhardened resin material is carried out by means of the filling method divided into two parts, at the moment when the process of placing the magnetic sensor element is finished, as illustrated in the figure 6A, a main part of the element body portion 122 of the Hall IC 120A is inserted into the unhardened resin material 200A. Alternatively, if the filling process with unhardened resin material is performed by means of the unique filling method, when the magnetic sensor element placement process is completed, as illustrated in Figure 6B, the Hall IC 120A and the circuit board 130 as a whole are inserted into the unhardened resin material 200A. Here, since the Hall IC 120A was used in the process of positioning the magnetic sensor element, which with the circuit board 130 is attached to the terminal 124 as illustrated previously in Figure 6, it is preferably commonly used. In this case, the
Element body portion 122 is placed in the cavity 110S and at the same time, the circuit board 130 is also placed in the housing portion 140S.
If the rotation angle sensing sensor 100B illustrated in Figure 4 will be manufactured in the two-part filling method, in the process of positioning the magnetic sensor element, it is only necessary that the sensor sensitive portion 126A of the Hall IC 120B is placed in the cavity 110S in which the unhardened resin material 200A is applied to be surrounded by the unhardened resin material 200A.
After the above, a hardening process is performed to harden the unhardened resin material 200A. A hardening method in this case may be selected as appropriate in accordance with a hardening mechanism of the unhardened resin material 200A to be used. As the hardening process, for example, if a thermosetting type is used as the unhardened resin material 200A, heating processing is executed or if a type of photohardening is used, ultraviolet radiation or the like is executed. Alternatively, if the unhardened resin material 200A is an unhardened resin material of the curable liquid type in which the hardening of the unhardened resin material 200A progresses spontaneously by means of a chemical reaction, it can simply be left as is.
for a period after the magnetic sensor element placement process is completed until the hardening is complete, but the heat treatment can be applied to promote hardening.
Here, if the filling process with unhardened resin material is carried out in the single filling method, upon completion of the hardening process, the rotation angle detecting sensor 100A illustrated in Figure 2 can be obtained. In this case, the resin member 152A and the resin member 154A are formed from the same resin member.
On the other hand, if the filling process with unhardened resin material is done in the filling method divided into two parts, after the hardening process is completed, a second session of the filling process with unhardened resin material for applying the unhardened resin material 200B (200) in the housing portion 140S is performed as illustrated in Figure 7, and subsequently, a second session of the hardening process is performed to cure the unhardened resin material 200B. The hardening method for the unhardened resin material 200B may be selected as appropriate in accordance with the hardening mechanism of the unhardened resin material 200B to be used. Alternatively, after the magnetic sensor element placement process is completed, the
second session of the filling process with unhardened resin material as illustrated in Figure 7, and then, the hardening process can be performed to jointly harden the unhardened resin materials 200A and 200B. Accordingly, the rotation angle detecting sensor 100A exemplified in FIG. 2 can be obtained. In this case, the resin member 152A and the resin member 154A are generally formed of different resin members but can be formed from the same resin member . If the hardening process is carried out twice through all the processes, the resin member surrounding the element body portion 122 in Figure 7 is the resin member 152A that hardens when performing the first session of the process. hardening, while if the hardening process is performed only once through all the processes, the resin member surrounding the element body portion 122 in Figure 7 is the unhardened resin material 200A.
Figure 8 is a schematic view of a section explaining the manufacturing method for the rotation angle detecting sensor 100 of a second embodiment and specifically, it is a diagram explaining another example of the manufacturing method for the detection sensor of a second embodiment. turning angle 100A illustrated in figure 2.
In the manufacture of the angle detection sensor
100A, first, an immersion process surrounds the element body portion 122 by means of the unhardened resin material 200A (FIG. 8) by applying the unhardened resin material 200A to the element body portion 122 of the Hall. IC 120A, by submerging the body portion of element 122 in a tank filled with unhardened resin material 200A or the like. In the Hall IC 120A used in this immersion process, it is generally preferable that the circuit board 130 be attached to the terminal 124 as illustrated previously in Figure 8.
Subsequently, the Hall IC 120A in which the element body portion 122 is surrounded by the unhardened resin material 200A is placed in the cavity 110S (magnetic sensor element placement process). At this time, the circuit board 130 attached to the terminal 124 is placed in the housing portion 140S, and an intermediate product similar to that illustrated in Figure 6A is obtained.
Subsequently, the hardening process is performed to harden the unhardened resin material 200A. After the above, the unhardened resin material 200B is applied to the housing portion 140S, and when performing the second session of the hardening process in addition, the rotation angle detection sensor 100A can be obtained. Alternatively, after performing the process of positioning the magnetic sensor element, the unhardened resin material 200B is applied to the housing portion 140S, and after that, when performing
In the hardening process for jointly hardening the unhardened resin materials 200A and 200B, the rotation angle detection sensor 100A can be obtained.
When the rotation angle sensing sensor 100B illustrated in Figure 4 will be manufactured, it is only necessary that at least the magnet sensitive portion 126A of the Hall IC 120B be surrounded by the unhardened resin material 200A in the process of immersion, or the entire portion composed of the magnet sensitive portion 126A, the IC sensor 126B, and the connecting line 126C may be surrounded by the unhardened resin material 200A. Then, the immersion process is performed and then it can be performed similarly to the case in which the rotation angle detection sensor 100A is manufactured.
Examples
The present invention will be described in more detail by citing the examples and the comparative examples.
Example 1
In the 100A rotation angle sensing sensor illustrated in Figure 2, 15 pieces of the evaluation samples were prepared using a urethane resin (vitrea transition temperature: -50 degrees, Pelnox Limited, MU-115A / M U- 115B) as the resin member 152A, and an epoxy resin (glass transition temperature: -32 degrees, Pelnox Limited, XM-2437 / HY-690) as the resin member 154A.
Evaluation of the variation in detection accuracy
Subsequently, an output (mV) of the Hall IC 120A was measured for the individual evaluation samples under the temperature environments of 25 and -40 degrees, and a relative output X (mV) at the temperature of -40 degrees was acquired using the output at the temperature of 25 degrees as a reference value (0 mV). So, an absolute value ?? (mV) of a difference between a maximum value Xmax and a minimum value Xmin of the relative output X at the temperature of -40 degrees of the individual evaluation samples was acquired as a variation in the detection accuracy between the individual evaluation samples. The result is shown in table 1.
Evaluation of mechanical durability (hardness)
With respect to mechanical durability, the hardness of the resin member 154A was evaluated on one side in direct contact with an external environment. The result is shown in figure 1. The hardness was a value measured by using a type A durometer based on JIS K 7215 except that an example 3 will be described later.
Evaluation of moisture resistance
With respect to moisture resistance, the moisture resistance of the resin member 154A was evaluated on the side in direct contact with the external environment. Specifically, a state after a resin block similar to resin member 154A is left for 2 months under a high temperature and a high humidity environment (temperature: 80 degrees, humidity: 95%) was evaluated based on the following evaluation reference.
The result is shown in table 1.
A: No particular noticeable change is shown in the
appearance and / or hardness with respect to before the test;
B: A slight change is shown in appearance and / or hardness with respect to before the test; Y
C: The alternation in appearance and a decrease in hardness such as flowability and deformation of a resin block surface are remarkable with respect to before the test.
Example 2
As the resin member 150A (i.e., the resin member 152A and the resin member 154A), 15 pieces of evaluation samples similar to the evaluation samples used in Example 1 were prepared except that a urethane resin was used (glass transition temperature: -50 degrees, Pelnox Limited, MU-115A / MU-115B). After the above, for these evaluation samples, evaluations similar to example 1 were carried out. The result is shown in table 1.
Example 3
As the resin member 150A (i.e., the resin member 152A and the resin resin member 154A), 15 pieces of evaluation samples similar to the evaluation samples used in Example 1 were prepared except that a resin was used of fluorine (glass transition temperature: -70 degrees, Chemical Co., Ltd., SIFEL8370A / SIFEL8370B of Shin-Etsu). After the above, for these evaluation samples,
Similar evaluations to example 1 were made with the exception of the hardness evaluation. The result is shown in table 1. With respect to hardness, resin member 154A is extremely soft, and hardness measurement similar to example 1 can not be performed and thus, the evaluation was performed by means of penetration.
Example 4
As the resin member 150A (i.e., the resin member 152A and the resin member 154A), 15 pieces of evaluation samples similar to the evaluation samples used in Example 1 were prepared except that an epoxy resin was used ( glass transition temperature: -67 degrees, Sanyu Rec Co., Ltd., NR-200C). After the above, for these evaluation samples, evaluations similar to example 1 were carried out. The result is shown in table 1.
Comparative example 1
As the resin member 150A (i.e., the resin member 152A and the resin member 154A), 15 pieces of evaluation samples similar to the evaluation samples used in Example 1 were prepared except that an epoxy resin was used ( glass transition temperature: -32 degrees, Pelnox Limited, X -2437 / HY-690). After the above, for these evaluation samples, evaluations similar to example 1 were carried out. The result is shown in figure 1.
Comparative example 2
As the resin member 150A (i.e., the resin member 152A and the resin member 154A), 15 pieces of evaluation samples similar to the evaluation samples used in example 1 were prepared except that a urethane resin was used (glass transition temperature: -30 degrees, Pelnox Limited, MU-204A / MU20413). After the above, for these evaluation samples, evaluations similar to those of Example 1 were made with the exception of the evaluation of the variation of detection accuracy. The result is shown in figure 1.
Table 1
List of reference signs
10 regulating valve control device 20 regulating valve body
22 entry ticket
24 throttle shaft (rotor)
26 throttle valve
28 magnet
30 gear
100, 100A, 100Bit angle detection sensor (non-contact angle sensing device)
110 stator
11 OS cavity
120, 120A, 120BHall IC (magnetic sensor element) 122 element body portion (member in which the magnet sensitive portion and the sensor IC are integrally formed)
124 terminal
126A magnet sensitive portion
126B sensor IC
126C connection line
130 circuit board
140 accommodations
140H fastening portion
140S accommodation portion
150, 150A, 150B resin member
152A, 152B resin member
154A, 154B resin member
200, 200A, 200B unhardened resin material (resin material in unhardened state)
Claims (8)
1. A non-contacting angle of turn detecting device, comprising at least: a stator provided with a cavity; a magnetic sensor element placed in the cavity, provided with a portion sensitive to the magnet and detecting a magnetic flux that changes by means of the rotation of a rotor; a circuit board electrically connected to the magnetic sensor element; Y a housing provided with a holding portion for holding the stator and a housing portion communicating with the stator cavity held by the holding portion and also housing the circuit board, and a resin member applied in the cavity and in the housing portion to surround the magnetic sensor element and the circuit board, where in the resin member, a glass transition temperature of the resin member that at least surrounds the magnet sensitive portion is -40 degrees or less.
2. The non-contacting rotation angle sensing device according to claim 1, wherein the resin member, the resin member applied in the cavity to encircle at least the magnet sensitive portion, is made of a urethane resin.
3. The non-contacting rotation angle detection device according to claim 1 or 2, wherein as the resin member applied to the cavity and to the housing portion for surrounding the magnetic sensor element and the circuit board, a epoxy resin and a urethane resin; Y the resin member applied to the cavity to surround at least the magnet sensitive portion is made of urethane resin.
4. The non-contacting rotation angle detection device according to claim 1 or 2, wherein the resin member applied to the cavity and to the housing portion for surrounding the magnetic sensor element and the circuit board is made of a urethane resin.
5. The non-contacting rotation angle detection device according to any of claims 1 to 4, wherein the magnetic sensor element has an element body portion in which the magnet sensitive portion and an IC sensor are integrally formed; Y in the resin member applied in the cavity and in the housing portion to surround the magnetic sensor element and the circuit board, the vitreous transition temperature of the resin member surrounding at least the element body portion is -40 degrees or less.
6. A manufacturing method for the non-contacting rotation angle detection device according to any of claims 1 to 5, comprising at least: a filling process with unhardened resin material to apply a resin material in an unhardened state whose vitreous transition temperature in a hardened state is -40 degrees or less in at least one cavity of a housing provided with a stator provided in the cavity, a holding portion for holding the stator, and a housing portion communicating with the stator cavity held by the holding portion and also housing a circuit board; a process of positioning magnetic sensor element to place a magnetic sensor element in the cavity filled with the resin material in the unhardened state to encircle at least a magnet sensitive portion of the magnetic sensor element provided with the sensitive portion to the magnet and detecting a magnetic flux changing by means of rotating a rotor by the resin material in the unhardened state; Y a hardening process for hardening the resin material in the unhardened state.
7. A manufacturing method for the non-contact angle-of-turn detection device according to any of claims 1 to 5, comprising at least: an immersion process for surrounding at least one magnet sensitive portion of a magnetic sensor element provided with the magnet sensitive portion and detecting a magnetic flux that changes by means of the rotation of a rotor by a resin material in a state unhardened whose vitreous transition temperature in a hardened state is -40 degrees or less; a process of positioning the magnetic sensor element for positioning the magnetic sensor element in which the magnet sensitive portion is surrounded by the resin material in the unhardened state in at least one cavity of a housing provided with a stator provided with the cavity, a holding portion for holding the stator, and a housing portion communicating with the stator cavity fastened by means of the holding portion and also housing a circuit board; Y a hardening process for hardening the resin material in the unhardened state.
8. A regulating valve control apparatus, comprising: at least one throttle body provided with at least one inlet passage, a shaft-shaped rotor provided to cross a radial direction of the passage of inlet and to penetrate the inlet passage, a throttle valve fixed to the rotor and rotatably mounted in the inlet passage, and a pair of magnets mounted at one end of the rotor to be opposite each other having a rotational axis of the rotor among them; Y the non-contacting rotation angle detection device according to claims 1 to 5 mounted to the throttle body for positioning the stator between the pair of magnets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011265802A JP2013117477A (en) | 2011-12-05 | 2011-12-05 | Non-contact type rotation angle detection device, method for manufacturing the same and throttle valve control device |
| PCT/JP2012/081026 WO2013084802A1 (en) | 2011-12-05 | 2012-11-30 | Non-contact rotation angle detection device, manufacturing method therefor and throttle valve control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2014006738A true MX2014006738A (en) | 2014-11-25 |
Family
ID=48574171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2014006738A MX2014006738A (en) | 2011-12-05 | 2012-11-30 | Non-contact rotation angle detection device, manufacturing method therefor and throttle valve control apparatus. |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2013117477A (en) |
| CN (1) | CN103998898A (en) |
| MX (1) | MX2014006738A (en) |
| WO (1) | WO2013084802A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10112484B2 (en) | 2014-07-30 | 2018-10-30 | Orscheln Products L.L.C. | Throttle pedal |
| CN107110665A (en) * | 2015-01-05 | 2017-08-29 | 松下知识产权经营株式会社 | Rotation angle detection apparatus and the rotation angle detecting unit using the rotation angle detection apparatus |
| IT201800006825A1 (en) * | 2018-06-29 | 2019-12-29 | ACTUATOR EQUIPPED WITH AN ELECTROMAGNETIC FIELD SHIELDING DEVICE FOR MAGNETIC OR MAGNETO-RESISTIVE POSITION SENSORS. | |
| EP3822589B1 (en) * | 2018-07-13 | 2023-11-01 | Mikuni Corporation | Detection device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156245A (en) * | 2000-11-20 | 2002-05-31 | Aisin Seiki Co Ltd | Noncontact displacement sensor |
| JP2003057078A (en) * | 2001-08-09 | 2003-02-26 | Nsk Ltd | Sensor and bearing apparatus with the sensor |
| JP2005106781A (en) * | 2003-10-02 | 2005-04-21 | Aisan Ind Co Ltd | Rotation angle sensor and its manufacturing method |
| WO2005115824A1 (en) * | 2004-05-28 | 2005-12-08 | Mikuni Corporation | Acceleration operation device |
| JP4433886B2 (en) * | 2004-06-02 | 2010-03-17 | 株式会社デンソー | Rotation angle detector |
| JP4695929B2 (en) * | 2005-06-30 | 2011-06-08 | 日立オートモティブシステムズ株式会社 | Non-contact rotation angle detection device, manufacturing method thereof, and throttle valve control device using the same |
| JP5147213B2 (en) * | 2006-10-11 | 2013-02-20 | 日立オートモティブシステムズ株式会社 | Inductance type rotation angle detection device and motor drive type throttle valve control device having the same |
| JP2009133637A (en) * | 2007-11-28 | 2009-06-18 | Aisin Seiki Co Ltd | Rotation detecting apparatus its production method |
| CN201407991Y (en) * | 2009-05-15 | 2010-02-17 | 河北衡绅汽车电子有限公司 | Non-contact angle sensor for electronic accelerator pedals |
| CN101782367A (en) * | 2010-01-30 | 2010-07-21 | 林颖 | Non-contact type rotating angle sensor |
| CN201955060U (en) * | 2010-12-16 | 2011-08-31 | 上海航盛实业有限公司 | Non-contact angle sensor |
-
2011
- 2011-12-05 JP JP2011265802A patent/JP2013117477A/en active Pending
-
2012
- 2012-11-30 WO PCT/JP2012/081026 patent/WO2013084802A1/en active Application Filing
- 2012-11-30 MX MX2014006738A patent/MX2014006738A/en not_active Application Discontinuation
- 2012-11-30 CN CN201280057781.7A patent/CN103998898A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN103998898A (en) | 2014-08-20 |
| JP2013117477A (en) | 2013-06-13 |
| WO2013084802A1 (en) | 2013-06-13 |
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