JP5205765B2 - Device, method, and program for detecting change in measured value in tank liquid volume measuring means due to condition change - Google Patents

Description

  The present invention relates to a technique for detecting a change in a measured value in a tank liquid amount measuring means due to a change in conditions, and in particular, a measurement in a tank liquid amount measuring means according to a change in conditions suitable for application to a fuel tank and a fuel gauge of an automobile or the like. The present invention relates to a value change detection technique.

  For example, the fuel tank and fuel measuring means of an automobile have a fuel capacity as much as possible even if conditions such as the shape and orientation of the fuel tank, the mounting position of the fuel measuring means, and the capacity of fuel stored in the fuel tank change. It is desirable to design so that can be accurately detected within an allowable value.

Therefore, conventionally, when designing the fuel tank and the fuel measuring means, the actual or model fuel tank and the fuel measuring means are used, and the shape, size and orientation of the fuel tank, the capacity of the fuel in the fuel tank, the fuel The conditions such as the mounting position of the measuring means were changed, and each time the change amount of the measured value in the fuel measuring means relative to the reference value was detected, and the fuel tank and the fuel measuring means were designed by taking this change amount into consideration. .
JP 2004-170179 A JP 2004-117121 A JP-A-3-253976

  However, in the past, a real or model fuel tank and fuel measurement means were used, and the fuel tank, fuel measurement means and fuel-related conditions were changed, and the amount of change from the reference value of the measurement value in the fuel measurement means was determined by trial and error. Since it was detected, there was a problem that cost and time were required, and further, it was impossible to respond quickly to changes in conditions during the design.

  Such a problem occurs not only when designing the fuel tank and the fuel measuring means, but also when designing various liquid tanks and liquid amount measuring means.

  The present invention has been made in view of such problems. When the conditions relating to the liquid tank, the liquid amount measuring means, and the liquid change without using the actual or model liquid tank and the liquid amount measuring means, the liquid amount It is an object of the present invention to provide a technique for detecting a change in a measurement value in a tank liquid amount measurement unit based on a change in conditions that can easily detect a change in a measurement value with respect to a reference value.

The present invention employs the following means in order to solve the above problems.
That is, the present invention
Regarding the measurement value of the liquid amount measuring means for measuring the amount of liquid stored in the liquid tank, the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid in the liquid tank have changed Further, an apparatus for detecting a change amount with respect to a reference value of the measured value in the liquid amount measuring means,
Input means for receiving input of conditions relating to the liquid tank, conditions relating to the liquid amount measuring means, and conditions relating to the liquid;
A measured value change amount detecting means for detecting a change amount of the measured value in the liquid amount measuring means based on the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid;
It is characterized by providing.

  The liquid tank may be a fuel tank such as an automobile. In the present invention, without using the actual or model liquid tank and the liquid amount measuring means, the above conditions can be changed simply by inputting the conditions relating to the liquid tank, the conditions relating to the liquid amount measuring means, and the conditions relating to the liquid in the liquid tank. In this case, it is possible to detect the amount of change in the measured value in the liquid amount measuring means. Accordingly, when designing the liquid tank and the liquid amount measuring means, it is possible to reduce costs and work time.

Here, the input means further receives an input of conditions relating to a measurement value display means for displaying the measurement result of the liquid amount measurement means,
The display value change amount detecting means for detecting the change amount of the display value of the measurement value display means with respect to the reference value based on the condition relating to the measurement value display means and the change amount of the measurement value can be further provided.

In addition, the liquid amount measuring means is a float that floats on the surface of the liquid, an arm that supports the float, and an arm that rotatably supports the arm, and the amount of the liquid is determined based on a rotation angle of the arm. Have a sender to detect,
The measurement value change amount detecting means includes a float movement locus detecting means for detecting a movement locus of the float;
A measurement value change amount calculating means for calculating a change amount of the measurement value based on a condition relating to the liquid tank, a condition relating to the liquid, and a movement locus of the float;
It can be constituted.

  Moreover, the output means which outputs the detection result of the said measured value variation | change_quantity detection means can be comprised further.

  In addition, the conditions relating to the liquid tank may be the shape, size and content of the liquid tank, and the attitude of the liquid tank. The shape of the liquid tank can include the number of liquid storage portions that store the liquid.

  Further, the condition relating to the liquid amount measuring means may be an attachment position of the sender and a center position of the float.

  The condition relating to the liquid may be a volume of the liquid stored in the liquid tank.

  Further, the present invention may be a method in which a computer, other devices, machines, etc. execute any one of the processes described above. Further, the present invention may be a program in which a computer or other device, machine, or the like realizes any one of the functions described above is recorded on a computer-readable recording medium.

  Here, the computer-readable recording medium refers to a recording medium that accumulates information such as data and programs by electrical, magnetic, optical, mechanical, or chemical action and can be read from the computer. .

  Examples of such a recording medium that can be removed from the computer include a flexible disk, a magneto-optical disk, a CD-ROM, a CD-R / W, a DVD, a DAT, an 8 mm tape, and a memory card.

Further, there are a hard disk, a ROM (read only memory), and the like as a recording medium fixed to the computer.

  According to the present invention, when various conditions change without using a real or model liquid tank and liquid amount measuring means, it is possible to detect the amount of change of the measured value in the liquid amount measuring means relative to the reference value. Accordingly, it is possible to reduce the cost and the work time.

  A technique for detecting a change in a measured value in a tank liquid amount measuring unit according to a change in conditions according to the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the drawings. In addition, the structure of the following embodiment is an illustration and this invention is not limited to the structure of embodiment.

<First Embodiment>
FIG. 1 shows a measurement value change amount detection device (hereinafter referred to as a measurement value change amount detection device) 1 in a tank liquid amount measurement means according to a change in conditions according to a first embodiment of the present invention.

  In the present embodiment, for example, a case where the present invention is applied to a fuel tank and a fuel gauge provided in an automobile will be described. However, the present invention can be applied to various liquid tanks and liquid amount measuring means.

  The measured value change amount detection device 1 uses a fuel tank for the measured value of the liquid amount measuring means 23 that measures the amount of fuel (liquid) 22 stored in a fuel tank 21 (see FIG. 2) that is a liquid tank. When the conditions regarding the liquid quantity measuring means 23 and the conditions concerning the fuel 22 in the fuel tank 21 change, the amount of change in the measured value in the liquid quantity measuring means 23 relative to the reference value (hereinafter referred to as the measured value change amount). ) And a change amount of the display value with respect to the reference value in the measurement value display means 28 for displaying the fuel volume measured by the liquid amount measurement means 23 (hereinafter referred to as a display value change amount).

  That is, the measurement value change amount detection apparatus 1 includes an input unit 11 that receives an input of a condition relating to the fuel tank 21, a condition relating to the liquid amount measuring unit 23, a condition relating to the fuel 22, a condition relating to the fuel tank 21, and a liquid amount measuring unit 23. And a measured value change amount detecting means 12 for detecting a measured value change amount in the liquid amount measuring means 23 when the conditions relating to the fuel 22 and the conditions relating to the fuel 22 change.

  The measurement value change detection device 1 is detected by a display value change detection means 13 for detecting a display value change in the measurement value display means 28 (see FIG. 2) and a measurement value change detection means 12. Output means 14 for outputting the measurement value change amount and the display value change amount detected by the display value change amount detection means 13.

  The measured value change amount detecting means 12 detects the movable locus of the float 25 (see FIG. 2) of the liquid amount measuring means 23 based on the conditions relating to the fuel tank 21, the conditions relating to the liquid amount measuring means 23, and the conditions relating to the fuel 22. Float movable locus detecting means 15, measured value change amount calculating means for calculating a measured value change amount in the liquid amount measuring means 23 based on a movable locus of the float 25, conditions relating to the fuel tank 21, and changes in conditions relating to the fuel 22. 16.

FIG. 2 shows the fuel tank 21, the fuel 22, the liquid amount measuring means 23 and the measured value display means 28. The fuel tank 21 is formed in a substantially rectangular parallelepiped shape (standard type). The symbol F (full) in FIG. 2 indicates the liquid level of the fuel 22 having a capacity corresponding to the F point (full tank capacity) of the scale 30 (see FIG. 3) indicating the full state of the measured value display means 28. The symbol E (empty) indicates the liquid level of the fuel 22 having the capacity corresponding to the point E on the scale 30 indicating the empty state.

  The liquid amount measuring means 23 supports a float 25 that floats on the surface of the fuel 22, an arm 26 that supports the float 25, one end of the arm 26 as a rotation center 26a, and based on the amount of rotation of the arm 26. And a sender 27 for detecting the capacity of the fuel 22 stored in the fuel tank 21.

  Further, as shown in FIG. 3, the measured value display means 28 is detected by an arc-shaped scale 30 in which a plurality of scale lines 30 a indicating the capacity of the fuel 22 stored in the fuel tank 21 are engraved, and the sender 27. Corresponding to the capacity of the fuel 22, a pointer 31 for indicating a predetermined scale line 30 a of the scale 30 is provided. In addition, the symbol F in FIG. 3 is the scale line 30a which shows that the fuel 22 is full, and the symbol E is the scale line 30a which shows that the fuel 22 is empty.

  Next, the above components will be described. As described above, the input unit 11 receives the input of the condition regarding the fuel tank 21, the condition regarding the fuel 22, and the condition regarding the liquid amount measuring unit 23.

  In the present embodiment, as conditions relating to the fuel tank 21, the shape and dimensions of the fuel tank 21, the inner capacity (internal capacity), and the vehicle inclination angle indicating the tank attitude are input. The shape of the fuel tank 21 can include the number of fuel storage portions that store the fuel 22. Here, there is one fuel reservoir (see FIG. 2).

  In the present embodiment, since the fuel tank 21 is fixed to a vehicle such as an automobile, the posture of the vehicle and the posture of the fuel tank 21 are the same. Therefore, in this embodiment, the vehicle inclination angle that is the vehicle posture is input as the posture of the fuel tank 21.

  In addition, as a condition relating to the liquid amount measuring unit 23, an attachment position of the sender 27 in the liquid amount measuring unit 23 is input. As will be described later, the length of the arm 26, the position of the rotation center 26a of the arm 26, and the position of the center 25a of the float 25 are used when detecting the measurement value change amount or the display value change amount. In the present embodiment, since these conditions are fixed, they are stored in a database and read out appropriately.

  Further, the capacity of the fuel 22 stored in the fuel tank 21 is input as a condition regarding the fuel 22.

  Furthermore, as conditions regarding the measured value display means 28, the length L of the pointer 31 (the distance from the rotation center 31a of the pointer 31 to the scale 30), the maximum swing angle θmax of the pointer 31 (the pointer 31 rotates from the E point to the F point). The rotation angle during the operation), the capacity of the fuel 22 corresponding to the scale line 30a indicated by the pointer 31 on the scale 30, the capacity of the nominal full tank (capacity corresponding to the F point), and the fuel tank 21 is stored. Among the fuel 22, there is a dead gas capacity indicating a capacity that cannot be used because the fuel pump cannot be sucked.

  In the present embodiment, since the conditions relating to the measured value display means 28 are fixed, the conditions are stored in a database and read out as appropriate.

  As shown in FIG. 2, the float movable locus detection means 15 in the measurement value change amount detection means 12 in FIG. 1 includes the capacity of the fuel 22 in the empty (point E) state and the full tank (point F). ) The float 25 is in an empty (point E) state of the fuel 22 based on the volume of the state, the position of the sender 27, the length of the arm 26, and the position of the rotation center 26a of the arm 26, which are conditions relating to the liquid amount measuring means 23. The float movable locus K, which is the locus on which the center 25a of the float 25 moves, is detected during the transition from the full to the full (F point) state.

  The measurement value change amount calculation means 16 of the measurement value change amount detection means 12 includes the float movable trajectory K detected above, the shape, dimensions and internal capacity of the fuel tank 21, and the capacity of the fuel 22 stored in the fuel tank 21. Based on the above, the measured value change amount is calculated.

  In the process of detecting the float movable locus K, as shown in FIG. 2, first, the fuel tank 21 is in a horizontal state, the fuel 22 is in a full tank state (capacity corresponding to point F of the measured value display means 28), and the fuel 22 A surface 41 is formed.

  Next, the surface 42 of the fuel 22 is formed with the fuel tank 21 in a horizontal state and the fuel 22 in an empty state (capacity corresponding to point E of the measured value display means 28).

  Next, the position of the center 25a of the float 25, the position of the rotation center 26a of the arm 26, and the length of the arm 26 (distance between the center 25a of the float 25 and the rotation center 26a of the arm 26) in the liquid amount measuring means 23. The float movable locus K is detected based on the full surface 41 and the empty surface 42 of the fuel 22.

  Next, the measured value change amount calculating means 16 of the measured value change amount detecting means 12 corresponds to the vehicle inclination angle, the capacity of the fuel 22 stored in the fuel tank 21 (the capacity indicated by the pointer 31 of the measured value display means 28). The amount of change in the measured value in the liquid amount measuring means 23 is detected based on the float movable locus K of the center 25a in the float 25.

  In the present embodiment, as the vehicle inclination angle, the vehicle inclination angle in the horizontal state is 0 °, the vehicle inclination angle in the front-down state is −4 ° and −8 °, and the vehicle inclination angle in the front-up state is +4. Measured values for a total of nine vehicle inclination angles, assuming that the vehicle inclination angles in the downward and leftward states are -4 ° and -8 °, and the inclination angles in the upward left state are + 4 ° and + 8 °. Detect the amount of change.

  Further, as the capacity of the fuel 22 stored in the fuel tank 21, the full tank capacity, the empty capacity, the 3/4 capacity = {3/4 × (the full tank capacity−the empty capacity). Capacity) + empty capacity}, 1/2 state capacity = {1/2 × (capacity in full state−capacity in empty state) + capacity in empty state}} Is detected.

  The capacity of the fuel 22 stored in the fuel tank 21 corresponds to the display value of the scale 30 indicated by the pointer 31 of the measurement value display means 28.

  In the measured value change amount calculation means 16, first, as shown in FIG. 4, the first liquid level 51 that is the surface of the fuel 22 is formed based on the vehicle inclination angle X and the volume of the fuel 22. FIG. 4 shows a state in which the vehicle posture (the posture of the fuel tank 21) is lowered forward.

  Next, an intersection K1 between the first liquid surface 51 and the float movable locus K is obtained. Next, as shown in FIG. 5, the fuel tank 21 is leveled, and the capacity of the fuel 22 is set so that the surface of the fuel 22 passes through the intersection K1. The surface of the fuel 22 in this case is the second liquid level 52.

Next, the measured value change amount is calculated by Equation 1.
Measurement value change amount = (capacity of fuel 22 corresponding to second liquid level 52) − (capacity of fuel 22 corresponding to first liquid level 51)

  When this measured value change amount is large, there is a possibility that problems such as a decrease in the reliability of the liquid amount measuring means 13 and the measured value display means 28 may occur. Therefore, it is preferable to design the fuel tank 21 and the liquid amount measuring means 23 so that the measured value change amount and the display value change amount are within the allowable values.

  Next, the display value change amount in the measurement value display means 28 is calculated based on the measurement value change amount calculated by Equation 1.

  In the present embodiment, as shown in FIG. 6, the display value from the point E to the point F of the scale 30 on the measurement value display means 28 and the capacity of the fuel 22 stored in the fuel tank 21 are substantially linearly related. It shall be in

  The display value change amount is calculated by Equation 2. In the present embodiment, as shown in FIG. 7, the length of the pointer 31 (the distance from the rotation center 31a of the pointer 31 to the scale 30) is the pointer length L, and the pointer 31 is from the E point to the F point of the scale 30. The rotating angle is defined as the maximum swing angle θmax. Further, the capacity of the fuel tank 21 corresponding to the point from the point E to the point F of the scale 30 is defined as a tank capacity between the scales EF.

  Note that the pointer length L, the maximum swing angle θmax, and the tank capacity between the scales EF are fixed values and are stored in advance in a database or the like provided in the hard disk.

Display value change amount = Trace amount of pointer between scales EF x (Measured value change amount / Tank capacity between scales EF) ...
..Formula 2
However, the amount of pointer trajectory between scales EF = 2 × π × pointer length L × (θmax / 360 °)
Scale EF tank capacity = (Fuel capacity corresponding to scale F point)-(Scale E point
Equivalent fuel capacity)

  Similarly, the condition of the fuel tank 21, the condition of the liquid amount measuring means 23, and the condition of the fuel 22 are changed, and the measurement value change amount and the display value change amount are detected by appropriately combining the conditions.

  The detected measurement value change amount and display value change amount are output by the output means 14. In the present embodiment, the measured value change amount and the display value change amount are output as a fuel tank tilt instruction characteristic 60 as shown in FIG.

  The fuel tank tilt instruction characteristic 60 includes a “front / rear check (−decreases forward)” column 61 that indicates a measured value change amount and an instruction variation amount when the vehicle tilts back and forth, and a case where the vehicle tilts left and right. Each column of “Left / Right Check (− is Downward)” column 62 indicating the measured value change amount and the display value change amount is provided.

  Further, a “numerical value” column 63 is provided on the left side of the “front / rear check” column 61 and the “left / right check” column 62, and a “graph” column 64 is provided on the right side.

  In the “numerical value” column 63, an “F scale” column 65, a “3/4 scale” column 66, a “1/2 scale” column 67, a “¼ scale” column 68, and an “E scale” column 69 are provided. It has been.

  In each “scale” column 65 to 69, the vehicle inclination angle (−8 °, −4 °, 0 °, + 4 °, + 8 °), the display value change amount, and the measurement value change amount are displayed as numerical values.

  In the “graph” column 64, a display value change amount graph 70 (see FIG. 9) and a measured value change amount graph 71 (see FIG. 10) are displayed.

In the display value change amount graph 70, as shown in FIG. 9, the horizontal axis represents the vehicle inclination angle X (deg), and the vertical axis represents the display value change amount (mm). In addition, the broken line 72 (line which connects a rhombus mark) in FIG. 9 shows the detected display value variation | change_quantity, and the broken lines 73 and 74 show an upper limit allowable value and a lower limit allowable value.

  The display value change amount of 0 indicates a reference value. In the present embodiment, when the fuel tank 21 is in a horizontal state, the values indicated by the measured value change amount and the display value change amount are set as the reference value (0).

  FIG. 9 shows the amount of change in the display value when the capacity of the fuel 22 corresponds to the F scale of the scale 30 and the vehicle posture is tilted back and forth. In addition, the-symbol attached in front of the vehicle inclination angle indicates a front-down or left-down state, and the + symbol indicates a front-up state or a left-up state.

  In this case, when the vehicle inclination angle is −4 °, −8 °, + 4 °, and + 8 °, the amount of change in the pointer is 4.5 (mm), which is the same, and deviates from the upper and lower limit allowable values 73 and 74.

  FIG. 10 shows the amount of change in the display value when the capacity of the fuel 22 corresponds to a 3/4 scale of the scale 30 and the vehicle posture is tilted back and forth. In this case, the display value change amount is 1.6 mm when the vehicle tilt angle is −4 °, the display value change amount is 3.1 mm when the vehicle tilt angle is −8 °, and the display value when the vehicle tilt angle is + 4 °. When the change amount is 1.5 mm and the vehicle inclination angle is + 8 °, the display value change amount is 3.0 mm. In all cases, the display value change amount is within the upper and lower limit allowable values 73 and 74.

  FIG. 11 shows the measured value change amount 75 when the capacity of the fuel 22 corresponds to the F scale of the scale 30 and the vehicle posture is tilted back and forth. In this case, when the vehicle inclination angle is −4 °, −8 °, + 4 °, + 8 °, the measured value change amount is −4.8 liters, which is outside the upper and lower limit allowable values 73 and 74.

  FIG. 12 shows the amount of change in the measured value when the capacity of the fuel 22 corresponds to a 3/4 scale of the scale 30 and the vehicle posture is tilted back and forth. In this case, when the vehicle tilt angle is −4 °, the measured value change amount is −1.7 liters, and when the vehicle tilt angle is −8 °, the measured value change amount is −3.4 liters and the vehicle tilt angle is + 4 °. When the measured value change amount is 1.7 liters, the measured value change amount is +3.4 liters when the vehicle inclination angle is + 8 °. In this case, the measured value change amount is within the upper and lower permissible values 73 and 74 at all the vehicle inclination angles.

The functions of the means 11 to 16 are realized by a computer program realized on the computer as one function of a CAD system realized on the computer. Here, the computer includes a CPU (Central Processing Unit), a memory, an input / output interface, an external storage device connected to the input / output interface, a display device, an input device, a communication device, and the like.

The external storage device is, for example, a hard disk drive device. Also, the external storage device is a removable storage medium drive device such as a CD-ROM (Compact Disc Read Only Memory).
) And a drive device such as a DVD (Digital Versatile Disk). Further, a flash memory card input / output device may be used as an external storage device.

  The display device is, for example, a CRT (Cathode Ray tube), a liquid crystal display, or the like. The input device is a keyboard, a pointing device, or the like. Examples of the pointing device include a mouse, a joystick, a touch panel, an electrostatic flat pointing device, a stick-shaped pointing device, and the like. The communication device is, for example, a LAN board.

<Processing flow>
FIG. 13 shows a detection processing flow of the measurement value change amount and the display value change amount by the measurement value change amount detection apparatus 1. As described above, this processing flow is realized as a computer program.

  In this process, first, the fuel tank shape, dimensions and internal volume are input as conditions relating to the fuel tank, the sender mounting position is input as a condition relating to the liquid amount measuring means, and the volume of fuel stored in the fuel tank is input as a condition relating to fuel. (S1).

  Next, a float movable locus is detected (S2). Next, an input of the vehicle inclination angle is received (S3). In addition, you may input a vehicle inclination angle by step S1.

  Next, a measured value change amount is detected (S4). Next, the display value change amount is detected (S5). Next, the measured value change amount and the display value change amount are output (S6).

  As described above, the measurement value change detection device 1 of the present invention does not use the actual or model fuel tank 21 and the liquid amount measuring means 23, and the conditions regarding the fuel tank 21, the fuel 22, and the liquid amount measuring means 23 are satisfied. When changed, it is possible to easily detect the change amount of the measurement value in the liquid amount measurement means 23 relative to the reference value and the change amount of the display value in the measurement value display means 28 relative to the reference value.

  Accordingly, since the measurement value change amount and the display value change amount are detected, the cost can be reduced and the work time can be shortened. Further, since the measurement value change amount and the display value change amount can be detected in a short time, the fuel tank 21 and the liquid amount measurement means 23 can be designed in a timely manner.

  In the above embodiment, the fuel tank shape, dimensions, internal volume, and vehicle inclination angle are applied as the fuel tank conditions, the sender mounting position is applied as the fuel measurement condition, and the fuel tank is used as the fuel condition. Although the capacity of the fuel stored inside is applied, various other conditions can be applied.

<< Second Embodiment >>
As shown in FIG. 14, the measurement value change amount detection apparatus 1 calculates the measurement value change amount in the liquid amount measurement means 23 attached to the vertical fuel tank 81 and the display value change amount in the measurement value display means 28. It can be detected. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The fuel tank 81 is formed in a bowl shape with a U-shaped cross section, a main tank 81a and a sub tank 81b corresponding to both sides of the U shape are arranged on the left and right sides, and a connecting portion 81c for connecting the main tank 81a and the sub tank 81b is provided. It is arranged on the upper side.

  Further, the liquid amount measuring means 23 and the measured value display means 28 are attached to both the main tank 81a and the sub tank 81b (see FIG. 15). In FIG. 14, the liquid amount measuring means 23 and the measured value display means 28 are omitted.

  The input means 11 includes the shape, dimensions, internal capacity and vehicle inclination angle of the fuel tank 81 (conditions relating to the fuel tank), the capacity of the fuel 22 stored in the fuel tank 81 (conditions relating to the fuel), and the sender in the liquid quantity measuring means 23. The input of the same conditions as in the first embodiment, such as the mounting position of 27, is received. The shape of the fuel tank 81 includes the number of fuel storage portions that store the fuel 22. Here, the number of fuel reservoirs is two (main tank 81a and sub tank 81b).

  As shown in FIG. 14, the float movable trajectory detection means 15 of the measurement value change amount detection means 12 first has a maximum capacity that can be stored in the main tank 81a at the vehicle inclination angle X at which the measurement value change amount should be detected. A liquid level (first liquid level) 82 of the fuel 22 corresponding to is formed.

Next, as shown in FIG. 15, when the capacity of the fuel 22 exceeds the maximum capacity that can be stored in the main tank 81a in the state where the vehicle inclination angle X is maintained, the maximum capacity is determined from the capacity of the fuel 22. As a result, the liquid level (second liquid level) 83 of the fuel 22 stored in the sub tank 81b is formed.

  Next, the intersections KA1 and KB1 of the float movable trajectories KA and KB in the liquid amount measuring means 23 and 23 attached in the tanks 81a and 81b and the first liquid surface 82 or the second liquid surface 83 are detected.

  Next, as shown in FIG. 16, the vehicle inclination angle X is set to 0 ° (horizontal state), and horizontal liquid surfaces (third liquid surfaces) 84 and 85 passing through the intersections KA1 and KB1 are formed.

  Next, the measurement value change amount detection unit 12 detects the measurement value change amount based on the mathematical formula 1. Next, the display value change amount detection means 13 detects the display value change amount based on Equation 2.

It is a figure which shows the measured value variation | change_quantity detection apparatus by the condition change of the liquid quantity measuring means for tanks of 1st Embodiment which concerns on this invention. It is a figure which shows the fuel tank of 1st Embodiment which concerns on this invention, a liquid quantity measurement means, a measured value display means, and a float movable locus | trajectory. It is a figure which shows the measured value display means of 1st Embodiment which concerns on this invention. It is a figure explaining the method to detect the float movable locus | trajectory of 1st Embodiment which concerns on this invention. It is a figure explaining the method to detect the measured value variation | change_quantity of 1st Embodiment which concerns on this invention. It is a figure which shows the relationship between the capacity | capacitance of the fuel of 1st Embodiment which concerns on this invention, and the display value in a measured value display means. It is a figure which shows the maximum swing angle of the pointer | guide of the measured value display means of 1st Embodiment which concerns on this invention. It is a figure which shows the measured value variation | change_quantity and display value variation | change_quantity of 1st Embodiment which concern on this invention. It is a figure which shows the display value variation | change_quantity of 1st Embodiment which concerns on this invention, and is a figure which shows the display value variation | change_quantity when the capacity | capacitance of a fuel corresponds to F scale. It is a figure which shows the display value variation | change_quantity of 1st Embodiment which concerns on this invention, and is a figure which shows the display value variation | change_quantity in case the capacity | capacitance of a fuel is equivalent to 3/4 scale. It is a figure which shows the measured value variation | change_quantity of 1st Embodiment which concerns on this invention, and is a figure which shows the measured value variation | change_quantity when the capacity | capacitance of a fuel corresponds to F scale. It is a figure which shows the measured value variation | change_quantity of 1st Embodiment which concerns on this invention, and is a figure which shows the measured value variation | change_quantity in case the capacity | capacitance of a fuel is equivalent to 3/4 scale. It is a figure which shows the processing flow of the measured value variation | change_quantity and display value variation | change_quantity detection process of 1st Embodiment which concerns on this invention. It is a figure explaining the method to detect the measured value variation | change_quantity and display value variation | change_quantity (pointer amount of variation | change_quantity) in the vertical fuel tank of 2nd Embodiment which concerns on this invention. It is a figure explaining the method to detect the intersection of the float movable locus | trajectory and a liquid level in the vertical fuel tank of 2nd Embodiment which concerns on this invention. It is a figure explaining the method to detect the measured value variation | change_quantity and display value variation | change_quantity in the vertical fuel tank of 2nd Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Measurement value change detection apparatus 11 Input means 12 Measurement value change detection means 13 Display value change detection means 14 Output means 15 Float movable locus detection means 16 Measurement value change calculation means 21 Fuel tank 22 Fuel 23 Liquid quantity measurement means 25 Float 25a Float Center 26 Arm 26a Arm Rotation Center 27 Sender 28 Measurement Value Display Means 30 Scale 30a Scale Line 31 Pointer 31a Center of Rotation 41 Fuel Surface in Full State 42 Fuel Surface in Empty State 51 First Liquid Level 52 Second liquid level 60 Fuel tank tilt instruction characteristic 70 Display value change amount graph 71 Measurement value change amount graph 72 Line indicating display value change amount 73 Upper limit allowable value of display value change amount 74 Lower limit allowable value of display value change amount 81 Fuel tank 81a Main tank 81b Sub tank 81c Connecting part 82 The liquid surface of the liquid surface 83 sub-tank of the tank

Claims (18)

A float that floats on the surface of the liquid stored in the liquid tank, an arm that supports the float, and the arm is supported rotatably, and the amount of the liquid is detected based on the rotation angle of the arm. For the measurement value of the liquid amount measuring means that has a sender and measures the amount of the liquid, when the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid in the liquid tank change, An apparatus for detecting a change amount with respect to a reference value of the measurement value in the liquid amount measuring means,
Input means for receiving input of conditions relating to the liquid tank, conditions relating to the liquid amount measuring means, and conditions relating to the liquid;
A measurement value change amount detection means for detecting a change amount with respect to a reference value of the measurement value in the liquid amount measurement means, based on the condition relating to the liquid tank, the condition relating to the liquid amount measurement means, and the condition relating to the liquid;
Equipped with a,
The measured value change amount detecting means includes a float movable locus detecting means for detecting a float movable locus indicating a locus when the float moves according to increase or decrease in the volume of the liquid;
Measurement value change amount calculating means for calculating the measurement value change amount based on the condition relating to the liquid tank, the condition relating to the liquid, and the float movable locus;
Have
The measured value change amount calculating means obtains an intersection point between the float movable locus and a first liquid surface that is a surface of the liquid in the liquid tank based on the respective conditions, and the intersection point when the liquid tank is horizontal. It obtains a second liquid surface through, by calculating the difference between the amount of liquid corresponding to an amount the first liquid level of the liquid corresponding to the second liquid level, that you calculate the measurement value amount of change An apparatus for detecting a change in a measured value in a tank liquid amount measuring means due to a characteristic change as a feature. The input means further receives an input of conditions relating to a measurement value display means for displaying the measurement result of the liquid amount measurement means,
A display value change amount detecting means for detecting a change amount with respect to a reference value of the display value in the measurement value display means based on a condition relating to the measurement value display means and a change amount of the measurement value; The change amount detection apparatus of the measured value in the tank liquid amount measurement means by the condition change according to claim 1. The measured value in the tank liquid amount measuring means according to the condition change according to claim 1 or 2 , further comprising an output means for outputting one or both of the measured value change amount and the display value change amount. Change amount detection device. Conditions related to the liquid tank, the shape of the liquid tank, the size and amount of contents, as well as tank liquid volume measurement by changing conditions according to any one of claims 1 to 3, characterized in that the orientation of the liquid tank Change amount detection device of measured value in means. Conditions related to the liquid quantity measuring means, the mounting position of the sender, and the measured value in the tank for liquid quantity measuring means according to the conditions change according to claim 3 or 4, characterized in that the position of the center of the float Change detection device. 6. The change amount of the measured value in the tank liquid amount measuring unit according to any one of claims 1 to 5 , wherein the condition relating to the liquid is a volume of the liquid stored in the liquid tank. Detection device. Computer
A float that floats on the surface of the liquid stored in the liquid tank, an arm that supports the float, and the arm is supported rotatably, and the amount of the liquid is detected based on the rotation angle of the arm. For the measurement value of the liquid amount measuring means that has a sender and measures the amount of the liquid, when the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid in the liquid tank change, An apparatus for detecting a change amount with respect to a reference value of the measurement value in the liquid amount measuring means,
Receiving conditions relating to the liquid tank, conditions relating to the liquid amount measuring means, and conditions relating to the liquid;
Detecting a change amount with respect to a reference value of the measured value in the liquid amount measuring means based on the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid;
The execution,
Detecting the measurement value change amount detecting a float movable locus indicating a locus when the float moves according to an increase or decrease in the volume of the liquid;
Calculating the measurement value change amount based on the condition relating to the liquid tank, the condition relating to the liquid, and the float movable locus;
Run
The step of calculating the amount of change in the measured value is based on the above conditions. When the liquid tank is horizontal, the intersection of the float movable locus and the first liquid surface that is the surface of the liquid in the liquid tank is obtained. Obtaining the second liquid level passing through the intersection and calculating the difference between the amount of liquid corresponding to the second liquid level and the amount of liquid corresponding to the first liquid level to calculate the measured value change amount; A method for detecting a change amount of a measured value in a tank liquid amount measuring means based on a condition change characterized by the following. The step of receiving an input of each condition further receives an input of a condition relating to a measurement value display means for displaying the measurement result of the liquid amount measurement means,
Conditions related to the measured value display unit, and on the basis of the measurement value variation, the step of detecting a change amount with respect to the reference value of the display value in the measured value display unit, to claim 7, characterized in that it further executes A method for detecting a change amount of a measured value in a tank liquid amount measuring means according to a change in conditions described. 9. The measured value in the tank liquid quantity measuring means according to the condition change according to claim 7 or 8 , further comprising the step of displaying one or both of the measured value change amount and the display value change amount. Change detection method. The liquid quantity measurement for a tank according to any one of claims 7 to 9 , wherein the conditions relating to the liquid tank are a shape, a size and an internal volume of the liquid tank, and an attitude of the liquid tank. Method for detecting change in measured value in means. 11. The tank liquid amount measuring means according to any one of claims 7 to 10 , wherein the condition relating to the liquid amount measuring means is an attachment position of the sender and a center position of the float. A method for detecting changes in measured values. Conditions related to the liquid, the amount of change in the measured value in the tank for liquid quantity measuring means according to the conditions change according to any one of claims 7 to 11, characterized in that the volume of the liquid to be stored in said liquid reservoir Detection method. On the computer,
A float that floats on the surface of the liquid stored in the liquid tank, an arm that supports the float, and the arm is supported rotatably, and the amount of the liquid is detected based on the rotation angle of the arm. For the measurement value of the liquid amount measuring means that has a sender and measures the amount of the liquid, when the condition relating to the liquid tank, the condition relating to the liquid amount measuring means, and the condition relating to the liquid in the liquid tank change, A program for detecting a change amount with respect to a reference value of the measurement value in the liquid amount measurement means,
Receiving conditions relating to the liquid tank, conditions relating to the liquid amount measuring means, and conditions relating to the liquid;
Detecting a change amount of the measurement value based on a condition relating to the liquid tank, a condition relating to the liquid amount measuring means, and a condition relating to the liquid;
Was executed,
Detecting the measurement value change amount detecting a float movable locus indicating a locus when the float moves according to an increase or decrease in the volume of the liquid;
Calculating the measurement value change amount based on the condition relating to the liquid tank, the condition relating to the liquid, and the float movable locus;
And execute
The step of calculating the amount of change in the measured value is based on the above conditions. When the liquid tank is horizontal, the intersection of the float movable locus and the first liquid surface that is the surface of the liquid in the liquid tank is obtained. obtains a second liquid level through said intersection point, by calculating the difference between the amount of the liquid corresponding to the amount and the first liquid surface of the liquid corresponding to the second liquid level, Ru is calculating the measurement value amount of change A program for detecting a change in a measured value in a tank liquid amount measuring means due to a change in conditions. The step of receiving an input of each condition further receives an input of a condition relating to a measurement value display means for displaying the measurement result of the liquid amount measurement means,
The step of detecting a display value change amount, which is a change amount of a display value in the measurement value display means, is further executed based on a condition relating to the measurement value display means and the measurement value change amount. Item 14. A program for detecting a change in a measured value in a tank liquid amount measuring unit according to a condition change according to Item 13 . The tank liquid amount measuring means according to claim 13 or 14 , further comprising the step of outputting or displaying one or both of the measured value change amount and the display value change amount. Measurement value change detection program. 16. The liquid quantity measurement for a tank according to a condition change according to claim 13 , wherein the conditions relating to the liquid tank are the shape, size and content of the liquid tank, and the attitude of the liquid tank. Program for detecting change in measured value in means. 17. The tank liquid amount measuring means according to any one of claims 13 to 16 , wherein the condition relating to the liquid amount measuring means is an attachment position of the sender and a center position of the float. Measurement value change detection program. Conditions related to the liquid, the amount of change in the measured value in the tank for liquid quantity measuring means according to the conditions change according to any one of claims 13 to 17, characterized in that the capacitance of the liquid to be stored in said liquid reservoir Detection program.

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