Hall sensor-based transducer device robust to temperature change

Abstract

The present invention relates to a Hall sensor-based transducer device robust to temperature change, wherein, by using a characteristic in which a magnetic flux density of a magnet used in a transducer of a control stick changes when the ambient temperature changes, an output signal according to a magnetic flux density is automatically corrected in response to temperature change, so that the transducer can output a consistent signal even when the temperature changes.

Description

Hall sensor-based transducer device robust to temperature changes

[0001] The present invention relates to a Hall sensor-based transducer device robust to temperature changes, and more specifically, to a Hall sensor-based transducer device robust to temperature changes that can output a consistent signal even with temperature changes by automatically correcting the output signal according to the magnetic flux density when the temperature changes, utilizing the characteristic that the magnetic flux density of the magnet used in the transducer of the control stick changes when the ambient temperature changes.

[0002] The control stick is one of the key control devices used by the pilot, primarily used to control the flight path and altitude of the aircraft, as well as to control the aircraft's tilt, direction, ascent, and descent. In other words, strain gauges measure the stress generated by the pilot's operation to enable the aircraft to respond accurately to the movement.

[0003] In particular, military weapon systems must be able to operate at harsh ambient temperatures under the conditions of MIL-STD-810G Method 501.5 / 502.5, Procedure II, and must be able to operate normally under vibration conditions of MIL-STD-810G Method 514.6, Procedure I.

[0004] A transducer is a device that converts the physical movement of a joystick into an electrical signal. When the joystick is moved, the transducer detects this and converts it into voltage, current, or a digital signal, which is then transmitted to the control system to perform the desired operation.

[0005] Transducers are precision sensors that provide accurate signals required by users while satisfying the operating environment conditions of military equipment, and are core components that require an Export License when imported from the United States.

[0006] Representative types of transducers used in joysticks include potentiometers, Hall effect sensors, optical sensors, and piezoelectric sensors. In particular, Hall effect sensors detect the position or angle of the joystick by responding to a magnetic field. They are often used in conjunction with ferrite magnets and offer the advantage of high durability due to their non-contact nature. By detecting and converting various signals from the joystick, these transducers accurately transmit joystick input to the system.

[0007] However, since the magnetic flux density of the magnets used in the control stick's transducers can change with ambient temperature and may decrease, particularly at high temperatures, there is a problem that can affect signal accuracy due to temperature variations. Furthermore, if the magnetic flux density changes with temperature, the transducer's output signal may also change, making it difficult to accurately detect position or movement.

[0008] The piezoelectric sensor method uses a method of detecting physical deformation of the control stick, so the change in measured values ​​is somewhat small depending on the external temperature, but because it detects mechanical deformation, there is a problem that fatigue damage occurs over time due to continuous strain.

[0009] Korean Registered Patent Publication No. 10-1110262 discloses an automatic correction technology for a strain signal amplifier. However, when this prior art is applied to a control stick, there is a problem in that fatigue damage occurs over time due to continuous strain because mechanical deformation is detected as described above.

[0010] The problem that the present invention aims to solve is to provide a temperature-robust Hall sensor-based transducer device capable of outputting a consistent signal even with temperature changes by utilizing the characteristic that the magnetic flux density of the magnet used in the control stick transducer changes as the ambient temperature changes, thereby automatically correcting the output signal according to the magnetic flux density when the temperature changes.

[0011] As one of the means for solving the problem of the present invention, a Hall sensor-based transducer device robust to temperature changes is proposed, comprising: a magnet mounted on the end of a control shaft and whose position changes according to the direction and angle of movement of the shaft; a plurality of Hall sensors fixedly installed adjacent to the magnet and outputting a magnetic field measurement value as they approach or move away according to the position change of the magnet; a temperature sensor measuring the temperature around the magnet; and a controller that corrects an offset and a dead zone according to a predetermined temperature range, wherein the controller sets the size of the dead zone to be smaller as the temperature range decreases and sets the size of the dead zone to be larger as the temperature range increases, while ensuring that the dead zone is set so as not to exceed the predetermined maximum and minimum size ranges.

[0012] In one embodiment, the controller is,

[0013] A hysteresis curve of each Hall sensor is derived according to the above-determined temperature range, and when the measurement value of each Hall sensor is output, the measurement value of each Hall sensor and the measurement value of the temperature sensor are received as input, and the offset may be corrected by correlating the output values ​​of each Hall sensor and the temperature sensor with the hysteresis curve of each temperature range derived in advance.

[0014] In one embodiment, the controller inputs a test magnetic field value of the same value to each of the Hall sensors and may correct the output values ​​of the remaining Hall sensors based on the Hall sensor with the smallest output change due to the change in magnetic field among the plurality of Hall sensors.

[0015] In one embodiment, the controller may learn the deviation between the temperature sensor output value and the actual temperature according to the predetermined temperature range, and adjust the size of the dead zone based on the temperature deviation.

[0016] In one embodiment, the controller may set the offset correction period to be short when the measured temperature value is higher than a preset reference temperature.

[0017] According to an embodiment of the present invention, the invention relates to a temperature-robust Hall sensor-based transducer device capable of outputting a consistent signal even with temperature changes by utilizing the characteristic that the magnetic flux density of the magnet used in the transducer of the control stick changes when the ambient temperature changes, thereby automatically correcting the output signal according to the magnetic flux density when the temperature changes.

[0018] FIG. 1 is an overall conceptual diagram of a transducer device according to Embodiment 1 of the present invention.

[0019] FIG. 2 is a block diagram illustrating the detailed configuration of a transducer device according to Embodiment 1 of the present invention.

[0020] FIG. 3 is a diagram showing the hysteresis curve of a Hall sensor according to Example 1 of the present invention.

[0021] FIG. 4 is a perspective view showing the internal configuration of a transducer according to Example 1 of the present invention.

[0022] FIG. 5 is a diagram showing the dead zone of a transducer device according to Embodiment 2 of the present invention.

[0023] Several embodiments of the present invention will be described in detail below with reference to the drawings. However, this is not intended to limit the present invention to any specific embodiment, and it should be understood that all transformations, equivalents, and substitutions including the technical concept of the present invention are included within the scope of the present invention.

[0024] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0025] Where in this specification it is stated that one component “have” or “comprise” a sub-component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0026] In this specification, the terms "...Unit," "...Module," and "Component" refer to a unit that processes at least one function or operation, and may be implemented in hardware, software, or a combination of hardware and software.

[0027] In this specification, the term “connect” may mean that two components are directly connected, but is not necessarily limited thereto, and may also mean that they are connected via one or more other components positioned between the components.

[0028] <Example 1>

[0029] Example 1 relates to a technique for correcting output values ​​based on temperature measurements according to changes in the movement of the control stick.

[0030] FIG. 1 is an overall conceptual diagram of a transducer device according to Embodiment 1 of the present invention.

[0031] The control stick is one of the core control devices used by the pilot, primarily used to adjust the aircraft's flight path and altitude, as well as to control the aircraft's tilt, direction, ascent, and descent.

[0032] The control stick is operated by a transducer that converts the physical movement of the stick into an electrical signal; when the stick is moved, the transducer detects this and converts it into voltage, current, or a digital signal, which is then transmitted to the control system to perform the desired operation.

[0033] The transducer device (100) of the present embodiment detects the movement of the joystick using a Hall sensor (120) that measures the change in the magnetic field according to the movement of the magnet (110) installed on the shaft of the joystick.

[0034] For example, the magnetic flux density of the magnet (110) varies depending on the ambient temperature. In particular, since the magnetic flux density of the magnet (110) may decrease at high temperatures, a problem may arise that may affect signal accuracy due to temperature changes.

[0035] In this embodiment, the temperature around the magnet (110) is measured through the temperature sensor (130), and the measurement value of the Hall sensor (120) is corrected and output based on the temperature measurement value.

[0036] FIG. 2 is a block diagram illustrating the detailed configuration of a transducer device according to Embodiment 1 of the present invention.

[0037] As shown in FIG. 2, the transducer device (100) of the present embodiment includes a magnet (110), a Hall sensor (120), a temperature sensor (130), and a controller (140).

[0038] The magnet (110) is connected to the end of the control shaft and changes position according to the direction and angle of movement of the shaft.

[0039] For example, the magnet (110) may be formed in the x-axis direction and the y-axis direction, respectively, at the end of the shaft.

[0040] The magnet (110) used in the transducer can be a ferrite magnet, a neodymium magnet, an Alnico magnet, etc.

[0041] Ferrite magnets are economical, have excellent corrosion resistance, and high temperature stability.

[0042] Neodymium magnets are rare-earth magnets that provide a very high magnetic flux density, allowing strong magnetic force to be obtained even with a small size.

[0043] It is a magnet made of an alloy of aluminum, nickel, and cobalt; it has high temperature stability and minimal variation in magnetic force, but the magnetic force is somewhat weak.

[0044] In addition, any magnet (110) that has magnetic flux density and stability and excellent responsiveness to external stimuli can be used in a transducer.

[0045] The Hall sensor (120) is fixedly installed adjacent to the magnet (110) in the transducer.

[0046] The Hall sensor (120) measures the strength of the magnetic field as it approaches or moves away according to the change in position of the magnet (110).

[0047] For example, a Hall sensor (120) detects a magnetic field using the Hall effect and converts changes in the magnetic field into an electrical signal.

[0048] The Hall effect is a phenomenon in which a voltage is generated perpendicular to the current due to the magnetic force when a magnetic field is applied perpendicularly to a conductor or semiconductor carrying an electric current.

[0049] That is, the Hall sensor (120) detects the angle of the control device (100) using the Hall voltage generated according to the position of the magnet (110), and converts it into an electrical signal and outputs it.

[0050] The Hall sensor (120) is fixedly installed adjacent to each of the x-axis magnet (110) and the y-axis magnet (110).

[0051] For example, if two magnets (110) are installed at each end in the x-axis direction centered on the shaft and two are installed at each end in the y-axis direction, a total of four Hall sensors (120) are installed at each end in the x-axis direction and the y-axis direction.

[0052] The Hall sensor (120) measures the strength of the magnetic field according to the position change of each adjacent magnet (110) and outputs the measured value of the magnetic field.

[0053] The temperature sensor (130) measures the temperature around the magnet (110).

[0054] The temperature sensor (130) may be a thermistor, RTD (Resistance Temperature Detector), thermocouple, semiconductor temperature sensor (130), etc., and is not limited to any one of them.

[0055] When the measurement value of the Hall sensor (120) is output as the position of the magnet (110) changes, the controller (140) receives the measurement value of the Hall sensor (120) and the measurement value of the temperature sensor (130), and corrects and outputs the measurement value of the Hall sensor (120) based on the measurement value of the temperature sensor (130).

[0056] For example, as the temperature of the magnet (110) rises, the magnetic flux density decreases. This is because as the temperature rises, the energy of the vibrating magnetic atoms increases, causing the magnetic arrangement to break. In other words, the alignment of the magnetic atoms becomes disordered, and the magnetic field that the magnet can generate weakens.

[0057] In one embodiment, the controller (140) applies a preset temperature coefficient representing a numerical change in magnetic flux density according to a temperature change to the magnet (110), and corrects the measurement value of the Hall effect sensor based on the temperature coefficient.

[0058] For example, the temperature coefficient of the ferrite magnet (110) can be set to about -0.2% / °C, and according to this temperature coefficient, if the temperature of the magnet (110) rises by 100°C, the magnetic flux density decreases by about 20%.

[0059] The controller (140) outputs a correction value that is increased by 20% from the output value of the Hall sensor (120) when the temperature of the magnet (110) rises by 100°C.

[0060] The controller (140) can maintain accurate control performance by applying different temperature coefficients depending on the type of magnet (110) and accurately correcting the reduction in magnetic flux density depending on the type of magnet (110).

[0061] For example, the controller (140) can set the temperature coefficient of the ferrite magnet (110) to -0.2% / °C, the temperature coefficient of the neodymium magnet (110) to -0.11% / °C, and the temperature coefficient of the Alnico magnet (110) to -0.02% / °C.

[0062] In one embodiment, the controller (140) further corrects the offset using the hysteresis curve of the Hall sensor (120) for more accurate correction.

[0063] Hereinafter, through FIG. 3, a technique for the controller (140) to further correct the offset using the hysteresis curve of the Hall sensor (120) will be described.

[0064] FIG. 3 is a diagram showing the hysteresis curve of a Hall sensor according to Example 1 of the present invention.

[0065] The hysteresis curve represents the nonlinear characteristics that occur when the Hall sensor (120) responds to temperature changes and magnetic fields, and hysteresis is a phenomenon in which the output of the Hall sensor (120) does not immediately follow when the measured value of the magnetic field changes, but rather a certain delay or difference occurs.

[0066] Accordingly, the controller (140) corrects the output value of the Hall sensor (120) through the hysteresis curve, and furthermore, by further reflecting the characteristic that the magnetic flux density of the magnet (110) changes according to the ambient temperature, derives the corrected hysteresis curve of each Hall sensor (120) according to a predetermined temperature range.

[0067] For example, a hysteresis curve ((A) of FIG. 3) is derived in a temperature range where there is no change in the magnetic flux density of the magnet (110), and a hysteresis curve ((B), (C) of FIG. 3) is derived by correction for each temperature range where there is a change in the magnetic flux density of the magnet (110).

[0068] For example, the controller (140) sets the temperature range of the hysteresis curve based on a preset temperature coefficient for the magnet (110). For instance, the controller (140) can derive a hysteresis curve for each temperature range in which the magnetic flux density changes by a preset percentage (e.g., 10%) according to the temperature change.

[0069] That is, if the temperature coefficient of the magnet (110) is -0.2% / °C, the temperature range can be set in increments of 50°. And if the temperature coefficient of the magnet (110) is -0.5% / °C, the temperature range can be set in increments of 20°. The hysteresis curve for each temperature range derived in this way can be stored in a recording medium or memory storage device (100) and utilized.

[0070] Then, when the adjustment lever is operated and the position of the magnet (110) changes, the controller (140) receives the measurement value of each Hall sensor (120) and the measurement value of the temperature sensor (130) as input, and corrects the offset by corresponding the output values ​​of each Hall sensor (120) and the temperature sensor (130) to the hysteresis curve for each temperature range derived in advance.

[0071] For example, as the magnet (110) changes position closer to the Hall sensor (120), the magnitude (H) of the magnetic field increases, and in a certain section, the magnetic flux density (B) reaches a saturation state where it no longer increases. Then, as the magnet (110) moves away from the Hall sensor (120), the magnitude (H) of the magnetic field decreases, and at this time, the magnetic flux density (B) decreases later than the change in the magnetic field. That is, there are cases where the magnetic flux density (B) does not become zero until the magnetic field has a negative value. For reference, the value of the magnetic field that makes the magnetic flux density (B) zero is called coercivity, and the magnitude of the coercivity is formed differently in the hysteresis curve for each temperature section. And the value corresponding to the coercivity, which is the value of the magnetic field that makes the magnetic flux density (B) zero, can be seen as an offset correction value.

[0072] In temperature range A, the magnitude of the magnetic field (H) reaching saturation according to the hysteresis curve may increase as the magnetic flux density decreases further in temperature range B (a temperature range higher than temperature range A) or temperature range C (a temperature range higher than temperature range B). That is, the magnitude of the coercivity in the hysteresis curve increases in temperature range B compared to temperature range A, so the corresponding offset correction value will be larger than in temperature range A, and in temperature range C, the offset correction value will be larger than in temperature range B.

[0073] In this way, the controller (140) applies a larger correction value in the B temperature range and C temperature range than in the A temperature range, even when the same magnetic field magnitude (H) is applied.

[0074] Accordingly, the present embodiment derives a hysteresis curve through a preliminary test and corrects the output value of the Hall sensor (120) according to temperature and magnetic field conditions, thereby ensuring that the output of the Hall sensor (120) maintains a constant standard under various environmental conditions.

[0075] Meanwhile, four Hall sensors (120) are used in the control stick, and theoretically, the four Hall sensors (120) should produce the same output value under the same conditions, but since the elements of the actual Hall sensors (120) each have slightly different physical characteristics, there are cases where the same output does not occur between the four Hall sensors (120) even if the control stick (i.e., shaft) is in the center.

[0076] Therefore, the offset (output imbalance) between the four Hall sensors (120) must be compensated for, and although this offset (output imbalance) is compensated to some extent at the time of factory release, it may not be completely compensated, and additional compensation may be required, especially depending on changes in ambient temperature and the lifespan (aging) of the sensors.

[0077] The controller (140) inputs the same value of test magnet (110) to each Hall sensor (120) (e.g., 4) and corrects the output values ​​of the remaining Hall sensors (120) based on the output value of one of the Hall sensors (120).

[0078] Here, the reference Hall sensor (120) may be the Hall sensor (120) that produces the smallest output value relative to the test magnet (110) value. That is, if the Hall sensor (120) with the smallest output change due to changes in the magnetic field is used as the reference, the reference does not change significantly even when environmental changes occur, thereby increasing the correction accuracy.

[0079] In particular, the controller (140) can maintain the output of the Hall sensors (120) constant by additionally correcting the output value of the reference Hall sensor (120) and the output values ​​of the remaining Hall sensors (120) by corresponding them to the hysteresis curve for each temperature range described above.

[0080] Meanwhile, the controller (140) may determine an offset correction period whenever the measured value of the temperature sensor (130) exceeds at least one preset reference temperature.

[0081] Multiple reference temperatures may be set. For example, a reference temperature may be set every 5° and an offset may be corrected whenever 5° is exceeded.

[0082] Additionally, the controller (140) may correct the offset according to a preset period.

[0083] For example, the controller (140) may correct the offset in 1ms increments.

[0084] Additionally, the controller (140) may set the offset correction period shorter as the reference temperature increases.

[0085] For example, at the first reference temperature, the offset is corrected in units of 10ms, and at the second reference temperature which is higher than the first reference temperature, the magnetic flux density decreases, so more precise correction is required, and the offset may be corrected in units of 5ms or 1ms.

[0086] FIG. 4 is a perspective view showing the internal configuration of a transducer according to Example 1 of the present invention.

[0087] As shown in FIG. 4, the magnets (110) of the transducer are provided in a total of four directions, each in the x-axis direction and the y-axis direction, in the first body (101).

[0088] Hall sensors (120) are provided in a second body (102) positioned at the bottom of the first body (101). Specifically, a total of four Hall sensors (120) are provided in the second body (102) corresponding to the magnet (110).

[0089] The magnet (110) is connected to the shaft, and when the shaft changes angle in the y-axis direction (up and down steering of the shaft), the magnet (110) of the x-axis rotates. At this time, the x-axis Hall sensor (120) measures the magnetic field strength of the x-axis magnet (110) according to the up and down steering of the shaft.

[0090] And when the shaft changes angle in the x-axis direction (left and right steering), the y-axis magnet (110) rotates. At this time, the y-axis Hall sensor (120) measures the magnetic field strength of the y-axis magnet (110) according to the left and right steering of the shaft.

[0091] <Example 2>

[0092] Example 2 relates to a technique for setting a dead zone in a Hall sensor-based transducer device.

[0093] FIG. 5 is a diagram showing the dead zone of a transducer device according to Embodiment 2 of the present invention.

[0094] The transducer device (100) of Example 2 includes a magnet (110), a Hall sensor (120), a temperature sensor (130), and a controller (140).

[0095] The magnet (110), Hall sensor (120), temperature sensor (130), and controller (140) of Example 2 are identical to the magnet (110), Hall sensor (120), temperature sensor (130), and controller (140) of Example 1, with only the functions added to the controller (140) of Example 1. Therefore, redundant descriptions of the magnet (110), Hall sensor (120), and temperature sensor (130) of Example 2 are omitted.

[0096] The dead zone is interpreted as a non-detection zone / blind zone / shadow zone / no response section, etc., and in the case of the Hall sensor (120), the dead zone refers to the range of input values ​​until an output is produced.

[0097] For example, if the fully tilted control stick (i.e., shaft) is 1 and the center position is 0, a dead zone of 0.5 means that recognition begins when the control stick is tilted more than halfway. Here, the range up to 0.5 is the dead zone.

[0098] When the control stick is first released, the stick (shaft) will be positioned in the exact center, but over time or due to changes in ambient temperature, it may fail to maintain that center position.

[0099] Therefore, in actual use, it is necessary to measure the output values ​​of each Hall sensor (120) in a state where the control stick is not operated (meter state) and to set the dead zone of each Hall sensor (120) with the output value of each Hall sensor (120).

[0100] The controller (140) corrects the output value of each Hall sensor (120) by corresponding it to the hysteresis curve for each temperature range while the position of the magnet (110) is not changed, that is, while the control stick is not operated.

[0101] And the controller (140) sets the dead zone (d1 or d2) of each Hall sensor (120) based on the corrected output value (a).

[0102] For example, the controller (140) can set a dead zone in a 20% range based on the corrected output value. Here, the controller (140) may also set the dead zone range differently depending on the measurement value of the temperature sensor (130).

[0103] The controller (140) sets the size of the dead zone to be smaller as the temperature range decreases and sets the size of the dead zone to be larger as the temperature range increases, but does not exceed the preset maximum and minimum size ranges of the dead zone.

[0104] For example, in temperature range A, the dead zone range may be set to 20% (d1), and in temperature range B, which is higher than temperature range A, the dead zone range may be set to 10% (d2) because the magnetic flux density decreases.

[0105] Therefore, by setting different dead zone ranges for each temperature range, the performance change of the Hall sensor (120) due to temperature change can be effectively corrected to increase the consistency of the output and prevent malfunction.

[0106] Meanwhile, the controller can learn the deviation between the temperature sensor output value and the actual temperature according to a predetermined temperature range, and adjust the size of the dead zone based on the temperature deviation.

[0107] Temperature sensors may experience changes in output characteristics, increased noise, or altered signal sensitivity depending on temperature changes.

[0108] The controller can minimize malfunctions by learning the relationship between temperature changes and sensor outputs in advance through the learning results of the deviation between these temperature sensor output values ​​and the actual temperature, and by predicting the temperature deviation that will occur at a specific temperature to more finely adjust the dead zone size.

[0109] In addition, the controller can learn the difference between the temperature sensor output value and the actual temperature based on the lifespan of the temperature sensor, and adjust the size of the dead zone based on that temperature difference.

[0110] <Example 3>

[0111] Example 3 relates to a technique for correcting output values ​​based on changes in movement of the control stick according to the lifespan of the Hall sensor.

[0112] The transducer device (100) of Example 3 includes a magnet (110), a Hall sensor (120), and a controller (140).

[0113] The magnet (110) is connected to the end of the control shaft and changes position according to the direction and angle of movement of the shaft.

[0114] For example, the magnet (110) may be formed in the x-axis direction and the y-axis direction, respectively, at the end of the shaft.

[0115] The Hall sensor (120) is fixedly installed adjacent to the magnet (110) in the transducer.

[0116] The Hall sensor (120) measures the strength of the magnetic field as it approaches or moves away according to the change in position of the magnet (110).

[0117] For example, a Hall sensor (120) detects a magnetic field using the Hall effect and converts changes in the magnetic field into an electrical signal.

[0118] The Hall sensor (120) is fixedly installed adjacent to each of the x-axis magnet (110) and the y-axis magnet (110).

[0119] For example, if two magnets (110) are installed at each end in the x-axis direction centered on the shaft and two are installed at each end in the y-axis direction, a total of four Hall sensors (120) are installed at each end in the x-axis direction and the y-axis direction.

[0120] The Hall sensor (120) measures the strength of the magnetic field according to the position change of each adjacent magnet (110) and outputs the measured value of the magnetic field.

[0121] The controller (140) corrects the output value of the Hall sensor (120) through a hysteresis curve, and furthermore, may derive a corrected hysteresis curve for each Hall sensor (120) according to a predetermined usage period by further reflecting the characteristic that the sensing performance decreases as the usage period of the Hall sensor (120) increases. In addition, the controller (140) may correct the offset by corresponding the output value of each Hall sensor (120) to the hysteresis curve corrected according to the usage period of the Hall sensor (120) derived in advance.

[0122] The controller (140) inputs the same value of test magnet (110) to each Hall sensor (120) (e.g., 4) and corrects the output values ​​of the remaining Hall sensors (120) based on the output value of one of the Hall sensors (120).

[0123] Here, the reference Hall sensor (120) may be a Hall sensor (120) that produces the smallest output value for the test magnet (110) value.

[0124] At this time, the controller (140) can maintain the output of the Hall sensors (120) constant by additionally correcting the output value of the reference Hall sensor (120) and the output values ​​of the remaining Hall sensors (120) by corresponding them to the hysteresis curve according to the aforementioned usage period.

[0125] Although the present invention has been described above with reference to several embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims.

[0126] In addition, among the embodiments described above, the invention relating to the method may be implemented as a program or as a computer-readable recording medium on which the program is stored.

[0127] That is, the present invention can be implemented in the form of an application, and can be implemented as a software program that runs on a mobile terminal such as a smartphone or tablet PC running on Google’s Android or Apple’s iOS, or as a software program that runs on a wearable device such as Google Glass, Apple Watch, Samsung Galaxy Watch, or smartwatch, or as a software program that runs on a laptop PC or desktop PC running on Microsoft’s Windows or Google’s Chrome OS.

[0128] In addition, partial functions of the device or system described above may be provided by being included in a computer-readable recording medium by tangibly implementing a program of instructions for implementing them. A computer-readable recording medium may include program instructions, data files, data structures, etc., either individually or in combination. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and USB memory.

Claims

1. A magnet mounted on the end of a control stick shaft, the position of which changes according to the direction and angle of movement of the shaft; A plurality of Hall sensors fixedly installed adjacent to the magnet and outputting magnetic field measurement values ​​as they approach or move away according to changes in the position of the magnet; A temperature sensor for measuring the temperature around the magnet; and It includes a controller that corrects offsets and dead zones based on predetermined temperature ranges, The above controller is characterized by setting the size of the dead zone to be smaller as the temperature range decreases and setting the size of the dead zone to be larger as the temperature range increases, while ensuring that it does not exceed the preset maximum and minimum size ranges of the dead zone. Hall sensor-based transducer device robust to temperature changes.

2. In Paragraph 1, The above controller is, A Hall sensor-based transducer device robust to temperature changes, characterized by deriving a hysteresis curve of each Hall sensor according to the above-determined temperature range, receiving the measurement value of each Hall sensor and the measurement value of the temperature sensor when the measurement value of each Hall sensor is output, and correcting the offset by correlating the output values ​​of each Hall sensor and the temperature sensor with the hysteresis curve of each temperature range derived in advance.

3. In Paragraph 1, The above controller is, A Hall sensor-based transducer device robust to temperature changes, characterized by inputting the same test magnetic field value to each of the above Hall sensors and correcting the output values ​​of the remaining Hall sensors based on the Hall sensor with the smallest output change due to magnetic field change among the plurality of Hall sensors.

4. In Paragraph 1, The above controller is, A Hall sensor-based transducer device robust to temperature changes, characterized by learning the deviation between the temperature sensor output value and the actual temperature according to the above-determined temperature range, and adjusting the size of the dead zone based on the above-determined temperature deviation.

5. In Paragraph 1, The above controller A Hall sensor-based transducer device robust to temperature changes, characterized by setting the offset correction period to be short when the measured temperature value is higher than a preset reference temperature.

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