KR20120067443A - The digital angle measurement sensor or device by the electronic circuit sensing pad in the liquid material which has horizontal plane - Google Patents

Abstract

PURPOSE: A digital angle measuring sensor and a device thereof are provided to accurately and stably measure an angle of inclination without a drift or a change of measurement value by obtaining gradient by using a digital value. CONSTITUTION: A digital angle measuring sensor comprises an upper layer installation member, a forming member, a lower layer installation member, an integration member, a groove installation member, a processing member, a sealing member, a detection member, and a measurement member. The upper layer installation member installs an upper layer(32) where a sensing pad is installed in an edge of the upper part. The forming member forms a plurality of middle layers(33) where the sensing pad are installed. The lower layer installation member a lower layer(34) where the sensing pad is installed in an edge of the lower part. The integration member integrates the upper and middle and lower layers. The processing member controls surface tension of a groove and fluid so that a contact angle between the fluid and sensing pad becomes very near to 90 degrees. The sealing member is partly filled with the fluid maintaining a horizontal plane by floating inside a package and sealed. The detection member applies electrical signals to a power supply pad, thereby detecting an electric property difference of all sensing pads using the fluid maintaining the horizontal plane. The measurement member detects locations of the sensing pads contacting to or not contacting to the fluid maintaining the horizontal plane, thereby measuring gradient.

Description

Digital angle measurement sensor or device by the electronic circuit sensing pad in the liquid material which has horizontal plane}

To measure the level and inclination of planes, analog levels have been used for a long time, using gravity to seal liquids in the main canisters to form bubbles and to keep the liquid plane perpendicular to the earth's center. Depending on the sensitivity of the main canister, one type detects inclination of 4 seconds (0.02mm / m), and two types have 10 seconds (0.05mm / m) and three types have 20 seconds (0.1mm / m) precision. The basic principle is that when the level is inclined, the bubble moves toward the higher side, so the grid line is set on the left and right sides of the bubble tube, and the position of the grid line indicated by the bubble is measured to measure the slope. An electronic or digital spirit level has also been developed to measure tilt with digitized numbers and graphics.The basic principle is to install a centrifuge to read the coordinates pointing to the centrifuge to measure the tilt. 7cm x 3cm) and weight (about 500g) and precision instruments are very expensive, but very precise, it can measure 4 seconds of inclination and is electronicized to transmit the measured values to the computer. If it can be miniaturized (for example, 1cm x 1cm x 4mm package) so that it can be mounted on a portable terminal, an acceleration sensor or a geomagnetic sensor that automatically converts the screen display mode of the smartphone horizontally and vertically by currently mounted on the current smartphone. As a result, the gyro sensor could be replaced. Acceleration sensor is based on the principle that electric charge is generated when acceleration is applied to piezoelectric material (piezo), and it is possible to find out the velocity and displacement by integrating it by measuring the acceleration of gravity in the 3-axis direction. Because of the constant of drift caused by, the drift is severe and needs to be corrected, so it is difficult to guarantee the precision. Therefore, it is used as a simple motion sensor and cannot measure the tilt angle accurately. The geomagnetic sensor crosses the coils at a 90-degree angle to each other, gives a signal to one side, and receives it from the other coil. When there is no magnetic field around, the two coils form 90 degrees. When the magnetic field is formed, the magnetic force is shifted and the signal is induced in the receiving coil. It is weak in external noise. However, it is mainly used to measure azimuth because it can detect a simple directional motion. It is mounted on Apple's iPhone in the United States and is used to realize motion detection and augmented reality. The gyro sensor, which is a rotational angular velocity sensor, generates a Coriolis force in the vertical direction of the rotating angle. The gyro sensor detects this vertical force and measures rotational acceleration in each direction, which is more complicated than the geomagnetic sensor and the acceleration sensor. These sensors are made of MEMS (Micro Electro Mechanical Systems) technology, making them lighter and thinner than conventional mechanical systems. The present invention can be used as a motion sensor that is expanding the range of applications, such as mobile phones, game consoles, cameras, etc. Unlike the previous acceleration sensor and gyro sensor, the digital value that can directly measure the absolute value of the slope without the integration process It provides a tilt angle sensor of the measurement method.

In the analog level, the glass tube is filled with liquid, and the position of the bubble is measured to measure the slope of the reference plane to be measured. On the outer wall of the glass tube, there is a means for measuring the position of the bubble electronically (for example, the color of the liquid is red and measured using a color image sensor). Alternatively, the slope may be measured by measuring the position of the bubble using conductivity. The liquid surface uses the principle of keeping it horizontal with respect to the center of the earth, and the response speed of the liquid surface when there is a change (eg shaking) of the surface to be measured by the glass tube due to the viscosity of the liquid to be sealed in the glass tube or the sealing pressure. Is determined. If the displacement of bubble is measured in glass tube and divided by unit time interval, angular velocity component is made in the corresponding direction, and if the difference of angular velocity component is divided by unit time, acceleration can be calculated. The gyro sensor currently used as a motion sensor is to measure the angular velocity of three axes. If three glass tubes are installed to correspond to each axis, the inclination angle, angular velocity and angular acceleration of the corresponding axis can be measured. In this case, it is necessary to study the viscosity of the liquid, the sealing pressure, and the characteristics of the inner wall of the glass tube so that the liquid surface does not slump. In a portable device such as a mobile phone, the volume of the sensor is very important in order to be equipped with a function of merely detecting motion (for example, changing a web browser to a landscape or portrait mode). Applicants for a means of providing a sensor for measuring the tilt angle, the angular velocity, and the angular acceleration of three axes by using the basic principle of sensing the height of the liquid surface as small as possible in a glass tube to be mounted on a printed circuit board (PCB) And the patent applications 10-2010-0051494 and 10-2010-0053118. In the present invention, it is intended to present the method that solves the trial and error and problems in the actual development process.

The present invention is to replace the geomagnetic sensor, gyro sensor, acceleration sensor used in the mobile phone to detect the motion through the sensor to directly measure the inclination of the axis. The geomagnetic sensor indicates the direction, but is sensitive to external magnetic field changes, and the precision is inferior. In the slopes above 70 degrees, there is a limit in indicating the direction of true north, and it cannot be used to measure the inclination of the object surface. Both the gyro sensor and the acceleration sensor calculate the displacement component by measuring the force corresponding to the acceleration and the velocity and integrate it. Thus, when the cumulative calculation is performed, the measured value varies depending on the drift and the time when the error is accumulated. In other words, the means for measuring acceleration requires complex integration calculations to calculate speed and displacement inversely, while the means for measuring displacement simply calculates speed by dividing displacement by time and acceleration by dividing speed by time. Become. In the present invention, unlike the conventional sensors, the displacement is measured directly as a digital value so that there is basically no change over time, and the problem is solved by calculating the displacement change per unit time to obtain the speed and acceleration. That is, the gyro sensor, the acceleration sensor, and the geomagnetic sensor require an analog numerical value and a circuit (for example, AD conversion) that converts it into a digital value by converting it into a digital value due to the structure and principle of the sensor. The digital direct sensor has the advantage that the peripheral circuit and the measurement are simply configured. In particular, the analog measurement value is affected by the temperature and humidity environment and includes noise components, so there is a problem in that the conversion, signal filtering, and compensation must be performed by a circuit or a program. The basic principle of the current level gauge that measures the horizontal plane is to calculate the inclination angle by measuring the inclination angle of the centrifugal weight from the inclined plane toward the earth's central axis. However, it is not suitable for dynamic measurement purposes such as angular velocity, and it is difficult to miniaturize a semiconductor package form, and thus it cannot be used as a motion recognition sensor widely used in mobile phones and game machines.

In addition, the method of measuring the capacity of the vessel and tank is currently installing a buoy moving up and down according to the liquid surface and detecting the position of the buoy by means of a potential meter, etc. It is difficult to provide, so we need to provide it digitally. In particular, in the case of the fuel tank of the vehicle can be used for the purpose of informing the driving distance to measure the exact amount of fuel, especially according to the inclination angle of the vehicle, and additionally it is necessary to accurately inform the amount of fuel injected from the gas station. In addition, in order to improve driving performance in cornering, etc. in an automobile, the tilt of four wheel axes can be accurately measured and controlled by an electronic shock absorber, but in reality, a means for accurately measuring the inclination angle is not provided. In the case of a precision machine tool, if a precise electronic level can be provided at a low cost, it can be installed as a base on the reference plane of the machine tool and can be extended to monitor the horizontal state at all times. Therefore, there is a need for a new concept of precision sensors that can be made in the form of small semiconductor packages and that measure the tilt directly digitally.

If the sensor is provided in a light and simple form, it can be expanded to various applications such as mounting on a smartphone. For example, an ionic liquid is used as the conductive liquid of the sensor means for measuring the inclination angle and calculating the angular velocity and the angular acceleration. In the case of water, the resistance is generally determined by the particles contained in the water, but it is generally known to be 1 to 2 mega ohms / cm. For example, in the case of an analog leveler in which a bubble is placed in a glass tube, a circuit board in which pads are set at regular intervals is inserted into the glass tube, and each pad is measured to determine whether the pads are in contact with each other. If you calculate it, you can know the slope. If the 3V power is momentarily applied, the resistance of water between the pads is 5 cm, and the resistance of the water is calculated to be 6 mega ohms. The current flow is about 0.5uA, so the use current is very small, so there is no risk of explosion even in the case of fuel such as gasoline. Alternatively, a method of checking whether the pads are conductive at once by installing all of the electrode pads that apply a signal next to the measurement pad is also effective. For example, when the length of the glass tube for measuring the inclination of one direction axis is 20 cm and the height direction is 2 cm, the circuit boards are provided with pads (0.1 mm pads are manufactured in current printed circuit boards) at intervals of 0.1 mm each. Using, you can measure the measurement section with 1/2000 precision (0.02 degrees). In this way, when installed in a container or a tank, it is possible to accurately measure the volume of liquid contained.If it is installed on both sides or four sides with respect to a predetermined axis, the capacity can be calculated considering the inclination of the container and tank. When applied to the tank, it is possible to measure the exact amount of fuel, it is possible to accurately calculate the distance traveled, as well as to measure the amount of fuel supplied by the main station. In the case of automobiles, it is known that fuel efficiency can be controlled by measuring the inclination of the road to be driven, so that the engine can be efficiently saved by 20% or more on the one degree inclination. When measuring the inclination using the direction deviation of the force by using the current acceleration sensor, the measurement error is too big for about 1 ~ 3 degrees. For this purpose, when a new method of measuring the inclination is developed, In addition to efficient fuel control, the four-axis height can be adjusted to improve driving performance when cornering.

By miniaturizing it and manufacturing it in the form of a semiconductor package, it is possible to replace the motion recognition sensor that recognizes acceleration and angular velocity, which are widely used in mobile phones and game machines. Is partially sealed to detect the position touching the six pad faces according to the tilt, and the tilt in the three axial directions can be measured simultaneously. By measuring the change in unit time, the velocity component is calculated, and when the speed change in unit time is calculated, the acceleration component is obtained and can be used as a motion recognition sensor. The present invention uses the principle that the liquid surface is always perpendicular to the direction of gravity, and by installing the pads on each side (6 sides in the case of a cuboid) in a predetermined container to detect the position of the pad in contact with the liquid, measuring only one axis In this case, the slope is measured by a trigonometric function, or in the case of three axes, a plane equation and a normal vector are obtained by measuring three points in contact with a liquid. Compared to the conventional analog methods, the measurement value itself is measured as digital data, and thus, AD converters and temperature compensation circuits are not required. Therefore, peripheral circuits and the like can be implemented very simply and stably. In the process of realizing this, the following problems occurred and were solved. First, pure water has a conductivity and tends to cause electrolysis, so it is necessary to select a liquid that is sufficiently conductive and stable, such as an ionic liquid. Secondly, due to the viscosity and surface tension of the liquid, there should be no wetting on the sensing pad according to the flow of the liquid. Therefore, the groove containing the liquid should be treated with a surface treatment such as DLC coating. DLC (Diamond Like Carbon) coating is a new amorphous carbon-based material, which is a thin film material made by electrically accelerating carbon ions or activated hydrocarbon molecules in plasma and impinges on the substrate, and has high hardness, corrosion resistance, and wear resistance. Its surface roughness and self-lubrication prevent water droplets, so it is also applied to automobile side mirrors without wet phenomenon. Third, the liquid tends to drop in conductivity with time (1 msec), so that the voltage is applied in the form of a pulse and measured during the ON time. The ON and OFF times are dependent on the characteristics of the liquid. Decide by Fourth, in the case of filling a liquid by forming a groove formed with a sensing pad in the printed circuit board, a routing process of digging a groove of a general printed circuit board is rough. Therefore, the grooves routed prior to coating should be polished or polished with a precision end mill to smooth the surface. Fifth, there are many differences in the liquid conductivity depending on the anode material to be supplied. For example, in certain ionic liquids (used in development experiments), treatment with lead improves conductivity two to three times rather than gold-plating pads on printed circuit boards.

In order to realize the basic principle that the liquid surface is always perpendicular to the direction of gravity, the present invention uses a printed circuit board provided with a sensing pad that is electrically connected through the liquid at regular intervals, so that the liquid touches each corner. This method relates to a motion sensor that calculates the slope by calculating the triangular function or normal vector by measuring the digital data directly. By solving various problems in the process of developing the motion sensor of this concept, it is possible to obtain the inclination by digital value instead of analog value such as gyro sensor, acceleration sensor or tilt sensor. It can be measured and the following effects are expected.

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First, in order to calculate the inclination through the acceleration sensor or the gyro sensor, the measured value must be integrated and a drift occurs due to the integral constant generated in this process. The present invention directly measures the inclination, thereby providing a sensor without drift.

Second, since all measured values in the existing acceleration or gyro sensor and the tilt sensor are analog values, AD conversion and temperature compensation circuit are required. However, the present invention measures the position of the sensing pad that is in contact with the liquid digitally. The circuit is simple because no calibration is required.

Third, when miniaturized in the form of a semiconductor package, it can be used to precisely measure the inclination and direction of movement of mobile devices such as mobile phones, game machines, remote controllers, and mice. And the like.

fourth. As the tilt measurement is done directly digitally, precise motion can be reliably measured, providing a motion interface instead of the finger touch interface of current smartphones such as the iPhone.

1 is a photograph of a fuel tank fuel level sensor widely used.
2 is a measurement principle diagram of the analog spirit level.
3 is a product description of a widely used electronic spirit level.
4 is a principle diagram for determining the inclination angle by measuring the surface of the liquid in contact with the pad of the present invention.
5 is a configuration diagram showing an example of installing the pad and the measurement circuit of the present invention in the package.
FIG. 6 is a configuration diagram of an inclination measuring sensor for measuring inclination in one axis direction and calculating capacity in the present invention.
7 is a configuration diagram of the inclination measuring sensor for measuring the inclination in the biaxial direction and calculating the capacity in the present invention.
FIG. 8 is a configuration diagram of an inclination measuring sensor in which a pad is installed at an upper side and a lower side in the present invention to measure an inclination in a biaxial direction and calculate a capacity, thereby extending the measurement range to 180 degrees.
FIG. 9 is a structural diagram of a sensing pad formed at twelve corners by using a printed circuit board or a wafer in three axes in the present invention.

The present invention utilizes the principle that the flowing liquid surface always maintains a vertical surface with respect to the gravity direction as the centrifugal direction is directed toward the gravity direction, and installs sensing pad means installed at predetermined intervals to allow electricity to flow through the liquid, When trying to measure height or length, an electrical signal is applied to a specific pad to allow electricity to flow through the pads to detect electrically connected pads, and to detect pads that are in contact with or not contact the liquid. The basic principle is to measure. To achieve this, sensing pads are formed at regular intervals according to the precision to be measured on the printed circuit board, and are connected to an IC or ASIC that reads whether electricity flows through each of the sensing pads, and supplies electricity to a specific pad. When the sensing pad is in contact with the liquid, the electricity is energized and the signal is detected. By reading the value, the height or length of the liquid surface can be known. To develop this, the sensing pads are installed at each of the 12 corners of the rectangular groove containing the conductive liquid to measure the inclination in the 3-axis direction. By measuring the position of the pads in contact with the liquid at each corner, the plane equation is obtained. The calculation shows the inclination in each axial direction. The conventional electronic level is limited to the inclination angle measurement range (about 45 degrees), but as the present invention measures the inclination angle by measuring the horizontal plane of the liquid can be extended to the measurement range up to 360 degrees when the sensing pad is installed on the upper and lower surfaces The tilt angle can be measured over the entire motion range. Sensors for measuring liquid height and length in this manner can be used not only for measuring the volume of liquids in containers and tanks, but also as motion-aware sensors when sensors and circuits are provided in the form of semiconductor packages. It can also be used to measure and control the tilt of four axis of precision machine tools, measuring equipment, and automobile. The basic concept of a level sensor for detecting a horizontal plane has been filed by the present inventor according to Patent No. 10-2010-0051494. There has been a lot of trial and error in the process of actually developing the present invention, and a method for solving the problem has been proposed. I will. Pure water is less conductive and prone to electrolysis, so it is important to choose a stable liquid that is sufficiently conductive, such as an ionic liquid. In addition, due to the viscosity and surface tension of the liquid due to the flow of the liquid to the sensing pad should not be wet, so the groove containing the liquid should be a surface treatment such as DLC coating, for example. DLC (Diamond Like Carbon) coating is a new amorphous carbon-based material, which is a thin film material made by electrically accelerating carbon ions or activated hydrocarbon molecules in plasma and impinges on the substrate, and has high hardness, corrosion resistance, and wear resistance. Its surface roughness and self-lubrication prevent water droplets, so it is also applied to automobile side mirrors without wet phenomenon. When a voltage is applied to the anode pad, the liquid tends to drop in conductivity with time (1 msec), so that the voltage is applied in the form of a pulse and measured during the on time. Determined by the properties of the liquid. In order to realize this, when a groove is formed in which a sensing pad is formed on a printed circuit board to fill a liquid, the sensing pad surface of the groove is rough in a routing process of digging a groove of a general printed circuit board. Therefore, the grooves routed prior to coating should be polished or polished with a precision end mill to smooth the surface. In addition, there are many differences in the conductivity of the liquid depending on the material of the anode supplying power. For example, certain ionic liquids have two to three times better conductivity than leaded gold rather than gold-plated pads on printed circuit boards. The present invention includes a design concept to solve these problems and to ensure a stable sensor characteristics with miniaturization and improved precision, which will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a photograph of a fuel level sensor of an automobile fuel tank, which has been widely used since the past. FIG. 2 is a measurement principle of an analog spirit level, and the inclination angle is measured by measuring a bubble position in a glass tube sealed with a ruler. 3 is a product manual of a widely used electronic spirit level, which measures the inclination angle of the centrifugal weight toward the center of the earth. The measurement range is limited to 45 degrees because the centrifugal weight is used.

4 is a principle diagram for determining the inclination angle by measuring the surface of the liquid in contact with the pad of the present invention. When the red line is a liquid plane, the angle of inclination in that plane is calculated by the trigonometric function as arctan (distance difference between two pads / distance between two pads). For example, if the distance between the pads is 0.25mm and the liquid surface is the same as the dotted line, the distance between the two pads is 10mm and the height difference between the two pads is 5mm, so the inclination becomes arctan (5/10) d = 26.6 degrees. Since printed circuit boards can print patterns and pads with 0.05mm accuracy, the measurement accuracy when forming pads in 0.1mm intervals in a 5mm x 5mm package is arctan (0.1 / 5) = 1.1 degrees, 10mm x 10mm The measurement accuracy when forming pads at 0.1 mm intervals in the package is actan (0.1 / 10) = 0.6 degrees. The measurement accuracy when forming pads at 0.05 mm intervals in a 10 cm x 1 cm package is arctan (0.05 / 100) = 0.02 degrees. To further increase the measurement accuracy, the distance between the two pads can be increased or the distance between the two pads can be narrowed more than 0.05 mm. In a printed circuit board, pads are formed in parallel rather than in series to form new pads between 0.05 mm. The precision can be increased. As the distance between the sensing pad and the power supply pad gets narrower, measurement can be made using the conductivity of the liquid even at a low voltage. For example, the outer circle is the sensing pad and the inner circle is the power supply pad type. Or reverse configuration). The condition of the pad face should be smoothed so that there is no irregularities to prevent the liquid from dropping. To read the pads, read the value using an input port such as a microprocessor. If the number of pads is large, connect the entire pads to the buffer IC, select them, and read them. The program calculates the slope, calculates the capacity, and displays it on separate display means. It is well known that it could be developed in FPGA or ASIC instead of a microprocessor.

5 is a configuration diagram showing an example of installing the pad and the measuring circuit of the present invention in a package, the sensing pad (4) in the depth direction when measuring a simple capacity when the level is maintained to some extent, such as a fixed tank or container The height of the liquid can be measured by attaching one printed circuit board. When the sensing pads 4 are installed on six surfaces to form a package, a flexible printed circuit board (FPCB) is used to produce a developed view. All sensing pads (4) are connected to the circuit and the pad detection means (1) for detecting the voltage generated by the current flowing when the liquid is in contact, the means for calculating the slope by calculating the difference in the pad height measured on each side (2) and an external communication means 3 for communicating with other external systems or for operating the display device. 6 is a configuration diagram of the inclination measuring sensor for measuring the inclination and calculating the capacity in the uniaxial direction in the present invention, characterized in that the sensing pad is installed on both sides facing. A height difference occurs between the padded surface A (6) and the padded surface B (8) along the horizontal plane (7) of the liquid in the container and the tank or liquid partially filled and sealed. When the axial distance (5) between two surfaces is L mm, the inclination in the axial direction is obtained as arctan (pad height difference / L). Through this, the capacity of the liquid contained in the inclination can be measured. When the vehicle is inclined in the traveling direction such as an automobile fuel tank, the capacity of the fuel can be accurately measured in consideration of the inclination of the road. FIG. 7 is a configuration diagram of an inclination measuring sensor for measuring inclination and calculating capacitance in a biaxial direction in the present invention, and is characterized in that a sensing pad is installed on four facing surfaces. In the container and tank or in a liquid-packed package, the padded surface A (6), padded B (8), padded C (9) and pad The height difference occurs between the installation surface D surface 10, respectively. If the axial distance (5) between the two sides of A ~ B is L mm, the inclination of the axial direction is calculated as arctan (A ~ B pad height difference / L), and the two-axis distance between the two sides of C ~ D When (5) is M mm, the inclination in the biaxial direction is obtained by arctan (C ~ D pad height difference / L). The volume of liquid contained can be measured by compensating the slope of each direction. FIG. 8 is a configuration diagram of an inclination measuring sensor in which the sensing pads are also installed on the upper and lower portions to measure the inclination in the biaxial direction and calculate the capacitance in the present invention, and the measurement range is expanded to 360 degrees. When the sensing pad is configured on the surface, the measurement problem occurs when the tilt measurement range exceeds the sensing pad installed on each surface. To solve this problem, install the A ~ B plane measuring range expansion pads connecting the sensing pads of A ~ B plane up and down, and the C ~ D plane measuring range expansion pad (12) connecting the sensing pads of C ~ D planes up and down. Install). For example, when the horizontal plane of the liquid exceeds the C plane according to the inclination, the inclination can be calculated because the C to D plane extension range expansion pad 12 on the upper surface of the liquid is detected. In this configuration, it is possible to measure the inclination up to 360 degrees, which is impossible with the conventional mechanical inclination measuring apparatus. The slope angle in the C ~ D direction is calculated by adding the number of pads detected by the upper and lower sensing pads in the horizontal plane of the liquid as shown in FIG. Calculate

 To implement the motion recognition and tilt measurement sensor, the configuration is as follows. Miniaturization is essential for mounting on small devices such as mobile phones. Accelerometers and gyro sensors were also large and expensive when implemented with existing mechanisms, but have been implemented with MEMS (Micro Electro Mechanical Systems) technology since the 1990s. Recently, the accelerometer has been successfully miniaturized to 3mm x 3mm x 1mm. MEMS is a micro technology that refers to a device in which mechanical parts, sensors, actuators, and electronic circuits are integrated on a silicon substrate. It is mainly manufactured using semiconductor integrated circuit fabrication technology, but a manufacturing process called etching is included because a three-dimensional shape must be created when fabricating a plane processing process in a semiconductor integrated circuit. Commercially available products include inkjet printer heads, pressure sensors, acceleration sensors, gyroscopes, and projectors. Accelerometers measure acceleration in analog values, and gyro sensors measure angular velocity in analog values.However, digital measurement of displacements such as three-axis tilt is unknown. Using the principle that the flowing liquid always maintains a horizontal plane perpendicular to the direction of gravity as in the present invention, a sensing pad is installed at each corner to detect the position of the pad touching the horizontal plane to obtain a planar equation and find a normal vector. The slope of the furnace can be calculated directly. In order to be mounted on a mobile device such as a mobile phone, it is necessary to miniaturize (particularly 4 mm or less in thickness). As a method of this, a technology to realize a small size in a printed circuit board will be described as follows.

Means for installing a top layer (32) provided with a sensing pad (35) at an upper edge thereof in measuring a position of a liquid flowing in the package and maintaining a horizontal plane; Means for forming a plurality of intermediate layers 33 provided with a sensing pad 37; Means for installing a lower layer (34) provided with a sensing pad (36) in the lower corner; Means for integrating the top and middle layers with the bottom layer; Means for installing a groove (39) containing a liquid that maintains a horizontal plane with sensing pads (35, 36, 37); Means for treating special coatings in grooves 39 containing liquids with sensing pads 35, 36, 37 and grooves 39 controlling the surface tension of the liquid to bring the contact angle between the liquid and the sensing pad close to 90 degrees. ; Means for partially filling and sealing a liquid that flows in the package to maintain a horizontal plane without filling the liquid; Means for detecting an electrical characteristic (such as resistance or capacitance or inductance) of all the sensing pads 35, 36, 37 through a liquid which maintains a horizontal plane by applying an electrical signal to the power supply pad 38; It is configured as a means for measuring the inclination by detecting the position of the sensing pads that are in contact with or not in contact with the liquid that maintains the horizontal plane, and provides a sensor type that detects the position of the sensing pads that is in contact with the liquid that maintains the horizontal plane. do. Or measuring the position of the liquid flowing in the package and maintaining a horizontal plane, comprising: means for installing a power supply pad or a power supply bipolar plate in the upper layer; Means for installing a layer provided with a sensing pad 35 at an upper lower layer edge; Means for forming a plurality of intermediate layers 33 provided with a sensing pad 37; Means for installing a layer provided with a sensing pad 36 at a lower upper corner; Means for installing a power supply pad or a power supply bipolar plate on the lower layer; Means for integrating the top and middle layers with the bottom layer; Means for installing a groove (39) containing a liquid that maintains a horizontal plane with sensing pads (35, 36, 37); Means for treating special coatings in grooves 39 containing liquids with sensing pads 35, 36, 37 and grooves 39 controlling the surface tension of the liquid to bring the contact angle between the liquid and the sensing pad close to 90 degrees. ; Means for partially filling and sealing a liquid that flows in the package to maintain a horizontal plane without filling the liquid; Means for detecting an electrical characteristic (such as resistance or capacitance or inductance) of all the sensing pads 35, 36, 37 through a liquid which maintains a horizontal plane by applying an electrical signal to the power supply pad 38; When the sensing pads are in contact with or not in contact with the liquid that maintains the horizontal plane, the sensing pads are configured to measure the inclination. Thus, the sensing pads are not easily disposed on the uppermost layer and the lowermost layer. At this time, if the package is composed of a printed circuit board, the conductive layer 30 and the insulating layer 31 of the printed circuit board are configured so that the distance between the side sensing pads 37 of the intermediate layer 33 is the thickness of the conductor layer and the insulating layer. I can regulate it. Means for constructing a package with a printed circuit board, comprising a conductor layer 30 and an insulating layer 31 and connecting the sensing pads 35, 36, 37 with signal processing and gradient calculation ICs 41; Means for measuring and determining the sensing pads in contact with the liquid in the signal processing and gradient calculation IC 41; Means for calculating a normal vector of the liquid horizontal plane through sensing pads in contact with the liquid; It is provided integrally by means of calculating the inclination of each axis. In this case, a power supply pad 38 for supplying power through the liquid to the sensing pads of the upper, lower, and intermediate layers is provided to be installed and driven in the intermediate layer 33. Alternatively, it may be configured such that a means for fixing the power supply bipolar plate sealing the groove to the upper layer or the lower layer by soldering is installed. At this time, the groove 39 containing the liquid to maintain the horizontal plane with the sensing pad made through the routing process of the printed circuit board is rough surface, through the sensing pad (35, 36, 37) in the groove 39 cross section Since there is a problem in inducing electrical characteristics, a process including a means for grinding the groove 39 into an end mill to improve the surface condition is included. Signal processing to prevent the detection voltage from dropping due to the characteristics of the liquid to the power supply pad 38 or the power supply positive electrode plate for supplying power to the sensing pads of the upper, lower, and intermediate layers due to the liquid conduction characteristics. And means for supplying power in the form of instantaneous pulses in the gradient calculation IC 41; Means for measuring the sense pads immediately after power up is started; Means for turning off the power supply for a period of time after the sensing pad measurement is finished; There is a need for a method of supplying power to a printed circuit board package sensor by repeating the above process to measure the position of the sensing pads in contact with or without contact with the liquid. In this case, the power supply pad 38 or the power supply positive electrode plate for supplying power to the sensing pads of the upper, lower and middle layers should be made of a material that prevents oxidation, adsorption or chemical reaction due to the conduction of liquid. Means configured in this manner to calculate a normal vector at each corner sensing pad location in contact with the liquid to obtain the slope of the horizontal plane; A means for calculating the velocity as a change in the slope per unit time of each axis; and a means for calculating the acceleration as a change in the unit time per unit axis in each axis. The package sensor provides the slope, angular velocity and acceleration. Or means for calculating and pre-storing the slope corresponding to each edge sensing pad position in contact with the liquid instead of performing a mathematical calculation; Means for finding a slope corresponding to each edge sensing pad position in contact with the liquid; means for calculating velocity as a change in inclination per unit time of each axis; and means for calculating acceleration as a change in speed in unit time per axis in each axis. Using the principle that the liquidity and the horizontal plane of the liquid are perpendicular to the direction of gravity, the material against the shaking and vibration of the package in the step of filling the empty space without filling the liquid to maintain the horizontal plane by flowing in the sealed package Means for adjusting using viscosity and surface tension of the material in the package to minimize shaking of the horizontal plane; And means for adjusting by means of sealing gas and pressure in the package to minimize horizontal surface sway of material against vibration and shaking of the package. Means for calculating and correcting an average value of a slope for a predetermined time in order to remove a fluctuation noise of a horizontal plane caused by shaking due to a liquid characteristic in the case of a measurement method using a liquid flow as much as a measurement value correction process is required in most sensors; And a means for disregarding the measured value in the case where the liquid horizontal plane is shaken by a certain level or more (e.g., shake due to impact). Grooves containing the liquid may be cylindrical, rectangular or spherical, which can be determined by considering the surface tension characteristics at the interface between the grooves in contact with the liquid maintaining the horizontal plane.

When an object moves, acceleration, angular velocity, tilt, and azimuth change. It is well known that in order to accurately observe the motion of an object, the method of measuring the above components simultaneously is most accurate. Velocity and inclination can be obtained by measuring the acceleration or the angular velocity by using the acceleration sensor and the angular velocity sensor, but there is a problem that must be corrected from time to time due to the integral constant generated during the integration process. Therefore, a drift that requires zero adjustment occurs, and analog measurement values fluctuate due to environmental influences such as sensor accuracy and temperature. Therefore, it is difficult to use repetitive detailed motion control while ensuring reliability, and it is used for simple game and horizontal-to-vertical mode conversion even in the smart phone to which it is applied. In the present invention, it is not an integral sensor, but directly measures the inclination, and if necessary, calculates the inclination change per unit time in the form of a derivative to obtain the angular velocity and acceleration, there is no integral constant, no drift occurs, and the inclination measurement itself is digital data. Measurement values due to precision and environmental influences remain unchanged, providing a reliable and repeatable motion sensor. Through this, the user interface of the smartphone can be combined with the motion manipulation method instead of the current touch manipulation method, thereby providing an interface base for conveniently using the smartphone. In addition, by applying the sensor of the present invention to the current optical wireless mouse to be used as the current on the mouse pad and configured to control the motion if necessary, it can be used more conveniently than the stand-alone motion mouse with a built-in gyro sensor. . Or in a terminal such as a smartphone, pressing a button or a touch indicating to control a menu using a tilt; Reading a means for detecting a tilt when a button is pressed and the terminal is tilted; Automatically moving the display screen of a running program in a tilted direction with respect to a predetermined slope or a change amount of the tilt, according to a slope; Releasing the touch of a button or touch indicating to control a menu using a tilt; By configuring the selected menu to be executed, a user interface of a motion method, rather than a multi-touch method using a current touch screen, is provided. In this case, the method of selecting a menu may also be configured by selecting a menu by selecting a menu and operating a button or a touch.

1 pad detection means 2 slope calculation means
3: external communication means 4: sensing pad
5: Axial distance 6: A side with pad installed
7: horizontal plane of liquid 8: B side with pad installed
9: side C with pads 10 side D with pads
11: 2-axis distance 12: C ~ D plane measuring range expansion pad
30 conductor layer 31 insulation layer
32: upper layer 33: middle layer
34: lower layer 35: upper four corner sensing pad
36: side sensing pad 38: power supply pad
39: grooves containing the fluid to maintain the horizontal plane 40: the substrate
41: Signal processing and gradient calculation

Claims (18)

In measuring the position of a liquid that flows in a package and maintains a horizontal plane,
Means for installing an upper layer (32) provided with a sensing pad (35) in an upper corner;
Means for forming a plurality of intermediate layers 33 provided with a sensing pad 37;
Means for installing a lower layer (34) provided with a sensing pad (36) in the lower corner;
Means for integrating the top and middle layers with the bottom layer;
Means for installing a groove (39) containing a liquid that maintains a horizontal plane with sensing pads (35, 36, 37);
Means for treating special coatings in grooves 39 containing liquids with sensing pads 35, 36, 37 and grooves 39 controlling the surface tension of the liquid to bring the contact angle between the liquid and the sensing pad close to 90 degrees. ;
Means for partially filling and sealing a liquid that flows in the package to maintain a horizontal plane without filling the liquid;
Means for detecting an electrical characteristic (such as resistance or capacitance or inductance) of all the sensing pads 35, 36, 37 through a liquid which maintains a horizontal plane by applying an electrical signal to the power supply pad 38;
Measuring the inclination by detecting the position of the sensing pads in contact with the liquid to maintain the horizontal plane, characterized in that the means for measuring the inclination by detecting the position of the sensing pads in contact with or not in contact with the liquid to maintain the horizontal plane sensor
In measuring the position of a liquid that flows in a package and maintains a horizontal plane,
Means for installing a power supply pad or power supply bipolar plate on the upper layer
Means for installing a layer provided with a sensing pad 35 at an upper lower layer edge;
Means for forming a plurality of intermediate layers 33 provided with a sensing pad 37;
Means for installing a layer provided with a sensing pad 36 at a lower upper corner;
Means for installing a power supply pad or power supply bipolar plate on the lower layer
Means for integrating the top and middle layers with the bottom layer;
Means for installing a groove (39) containing a liquid that maintains a horizontal plane with sensing pads (35, 36, 37);
Means for treating special coatings in grooves 39 containing liquids with sensing pads 35, 36, 37 and grooves 39 controlling the surface tension of the liquid to bring the contact angle between the liquid and the sensing pad close to 90 degrees. ;
Means for partially filling and sealing a liquid that flows in the package to maintain a horizontal plane without filling the liquid;
Means for detecting an electrical characteristic (such as resistance or capacitance or inductance) of all the sensing pads 35, 36, 37 through a liquid which maintains a horizontal plane by applying an electrical signal to the power supply pad 38;
Measuring the inclination by detecting the position of the sensing pads in contact with the liquid to maintain the horizontal plane, characterized in that the means for measuring the inclination by detecting the position of the sensing pads in contact with or not in contact with the liquid to maintain the horizontal plane sensor
The method of claim 1 and 2,
The package consists of a printed circuit board
Consists of a conductor layer 30 and an insulating layer 31 to adjust the distance between the side sensing pad 37 of the intermediate layer 33 to the thickness of the conductor layer and the insulating layer, which is in contact with the liquid to maintain the horizontal plane Sensor in the form of a printed circuit board package that detects the pad position and detects the tilt
The method of claim 1 and 2,
The package consists of a printed circuit board
Means for constructing a conductor layer (30) and an insulating layer (31) and connecting the sensing pads (35, 36, 37) with signal processing and gradient calculation ICs (41);
Means for measuring and determining the sensing pads in contact with the liquid in the signal processing and gradient calculation IC 41;
Means for calculating a normal vector of the liquid horizontal plane through sensing pads in contact with the liquid;
Method for constructing a printed circuit board package sensor for measuring the tilt by detecting the position of the sensing pad in contact with the liquid to maintain the horizontal plane, characterized in that the means for calculating the tilt for each axis
The method of claim 1 and 2,
A power supply pad 38 for supplying power to the sensing pads of the upper, lower, and intermediate layers through the liquid is installed in the intermediate layer 33. The position of the sensing pad in contact with the liquid maintaining the horizontal plane is detected and tilted. Power supply pad of the printed circuit board package sensor being measured
The method of claim 1 and 2,
A means for soldering a power supply anode plate that seals a groove to an upper layer or a lower layer is installed. The power supply anode plate of a printed circuit board package sensor which detects a position of a sensing pad in contact with a liquid maintaining a horizontal plane and measures a tilt.
The method of claim 1 and 2,
The groove 39 containing the liquid maintaining the horizontal plane with the sensing pad made through the routing of the printed circuit board has a rough surface,
Since there is a problem in inducing electrical characteristics through the sensing pads 35, 36, 37 in the groove 39 cross section,
Processing of the printed circuit board package sensor for detecting the position of the sensing pad in contact with the liquid maintaining the horizontal plane and measuring the inclination, comprising means for grinding and end milling the groove 39 to improve the surface condition. Way
The method of claim 1 and 2,
The power supply pad 38 or the power supply positive electrode plate for supplying power to the sensing pads of the upper, lower, and intermediate layers has a signal processing and gradient calculation IC (41) to prevent the sensing voltage from dropping due to the characteristics of the liquid after a certain time. )in
Means for supplying power in the form of instantaneous pulses;
Means for measuring the sense pads immediately after power up is started;
Means for turning off the power supply for a period of time after the sensing pad measurement is finished;
Repeating the above procedure measures the position of the sensing pads that are in contact with or without the liquid, and detects the position of the sensing pads in contact with the liquid that maintains the horizontal surface. Supply way
The method of claim 1 and 2,
As a power supply pad 38 or a power supply positive electrode plate for supplying power to the sensing pads of the upper, lower and middle layers,
Anode material of a printed circuit board package sensor that detects the position of a sensing pad in contact with a horizontal surface material and measures its inclination, which is composed of a material which prevents oxidation, adsorption or chemical reaction due to liquid conduction.
The method of claim 1 and 2,
Means for calculating a normal vector with each edge sensing pad position in contact with the liquid to obtain a slope of the horizontal plane;
Means for calculating velocity as a change in slope per unit time of each axis: and
Method for calculating the speed and inclination of a printed circuit board package sensor for measuring the inclination by detecting the position of the sensing pad in contact with a horizontal-maintaining material, characterized in that the acceleration is calculated by changing the speed per unit time of each axis.
The method of claim 1 and 2,
Means for calculating and pre-storing the inclination corresponding to each edge sensing pad position in contact with the liquid;
Means for retrieving a slope corresponding to each edge sensing pad position in contact with the liquid;
Means for calculating velocity as a change in slope per unit time of each axis: and
Method for calculating the speed and inclination of a printed circuit board package sensor for measuring the inclination by detecting the position of the sensing pad in contact with a horizontal-maintaining material, characterized in that the acceleration is calculated by changing the speed per unit time of each axis.
The method of claim 1 and 2,
In the step of filling with the empty space instead of filling the liquid to flow in the sealed package to maintain the horizontal plane
To minimize shaking of the material horizontal surface against package shaking and vibration
Means for adjusting using the viscosity and surface tension of the material in the package; And
It is a means of adjusting by using the sealing gas and pressure in the package to minimize the horizontal surface rumble of the material against the vibration and shaking of the package. How to control the liquid flow of the printed circuit board package sensor
The method of claim 1 and 2,
In order to remove the fluctuation noise of the horizontal surface caused by the shaking due to the liquid characteristics
Means for calculating and correcting an average value of the slope over a period of time; And
In the case where the liquid level surface is shaken for a certain level (e.g., shake due to impact), it measures the inclination by detecting the position of the sensing pad that is in contact with the liquid that maintains the flow level. How to Control Liquid Flow in Printed Circuit Board Package Sensors
The method of claim 1 and 2,
Groove shape cylindrical;
Or square;
Or, the groove configuration of the printed circuit board package sensor for measuring the tilt by detecting the position of the sensing pad in contact with the liquid to maintain the horizontal plane, characterized in that the sphere configuration
The method of claim 1 and 2,
Means for forming a plurality of intermediate layers 33 provided with a sensing pad 37;
Detect the slope of the sensing pad in contact with the liquid to maintain the horizontal plane, characterized in that the intermediate layer sensing pad 37 is installed in the middle of the corner, not the vertex, to remove the surface tension characteristic variable of the liquid at the vertex. How to set the middle layer sensing pad of the printed circuit board package sensor
In the optical wireless mouse,
Means for installing a motion sensor;
In parallel with the optical distance movement detection means on the mouse pad
Means for selecting a motion sensor operating mode;
Optical wireless mouse that can select motion control with a built-in motion sensor, which means that the cursor is moved up, down, left and right by the motion sensor.
In the terminal,
Pressing a button or touch indicative of controlling a menu using a tilt;
Reading a means for detecting a tilt when a button is pressed and the terminal is tilted;
Automatically moving the display screen of a running program in an inclined direction with respect to a predetermined inclination or inclination change amount;
Or moving in an inclined direction by decreasing or decreasing the speed according to the inclination;
Releasing the touch of a button or touch indicating to control a menu using a tilt;
Terminal or mobile phone or game machine or program having a function of selecting a menu by detecting an inclination or inclination change amount, characterized in that the selected menu is configured to be executed.
In the terminal,
Operating a button or touch indicative of controlling a menu using a tilt;
Reading a means for detecting a tilt when a button is pressed and the terminal is tilted;
Automatically moving the display screen of a running program in an inclined direction with respect to a predetermined inclination or inclination change amount;
Or moving in an inclined direction by decreasing or decreasing the speed according to the inclination;
Operating a button or touch;
Terminal or mobile phone or game machine or program having a function of selecting a menu by detecting an inclination or inclination change amount, characterized in that the selected menu is configured to be executed.

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