JP4296288B2 - Door closing inspection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door closing inspection apparatus for evaluating door closing performance.
[0002]
[Prior art]
As a conventional technique for evaluating the door closing performance of an automobile, for example, a pair of two doors that are fixed to the door-side movable member by attaching a door-side movable member to the outer peripheral edge of the door and a body-side fixing member to the body. There is a technique in which the detected portion detects a half-door state based on a speed and timing difference that blocks the light of the optical detector attached to the body-side fixing member (see Patent Document 1).
[0003]
In this technique, it is determined that the door is completely closed if both of the two pairs of detected portions block the light of the optical detector, and only one of the two pairs of detected portions of the light of the optical detector is determined. If it is not blocked, it is determined that the door is in a half-door state.
[0004]
[Patent Literature]
JP 2001-354177 A
[0005]
[Problems to be solved by the invention]
However, in the above technique, the door-side movable member having the detected part is detected so that both of the two detected parts are detected when the door is completely closed and only one is detected when the door is half-door. A body side fixing member having an optical detector attached to the outer edge of the door must be attached to the body side. For this reason, unless the mounting accuracy of the door-side movable member and the body-side fixing member is increased, both of the detected members are detected even when the door is half-door, and conversely, when one of the detected members is completely closed. There is a problem that it occurs that only the detection member is detected, and the work preparation time for attaching the door-side movable member and the body-side fixing member becomes long.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a door closing inspection device that can shorten the inspection preparation time and can automatically determine whether the door is closed, that is, whether the door is completely closed or half door. It is.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a load measuring means that is attached to a door and measures a load generated in accordance with the movement of the door, and the door is based on a change in the load value measured by the load measuring means. And a determination means for determining whether or not the door is in a half door state.
[0008]
【The invention's effect】
According to the present invention, it is possible to automatically determine whether or not the door is in a half-door state by simply attaching the load measuring means, and the attachment position of the load measuring means may be anywhere on the door. Since it is not necessary to perform troublesome work such as position adjustment, inspection preparation time can be shortened.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
FIG. 1 shows an outline of a door closing inspection apparatus according to an embodiment of the present invention. This inspection apparatus 10 evaluates the closing performance of a door that is rotatably attached to a vehicle body (door support) via a hinge.
[0011]
As shown in FIG. 1, the inspection apparatus 10 includes a load cell 11 that is a load measuring unit that measures a load applied to the door during the door closing operation, an angular velocity sensor 100 that is an angular velocity measuring unit that measures the angular velocity ω, A load cell 11 and a computer (hereinafter referred to as “PC”) connected to the angular velocity sensor 100 are provided.
[0012]
The load cell 11 is attached to an automobile door and measures a load (so-called dynamic load) applied to the door as the door is opened and closed. The load cell 11 converts a load applied using a strain gauge into a change in voltage. taking measurement. Here, the load applied to the door is a force applied to the door as the door is opened and closed, and a reaction force applied to the door when the door hits the body side when the door is closed.
[0013]
The load cell 11 has a magnet 12 attached to one surface of the load cell 11. Thereby, the load cell 11 can be easily attached to and detached from the door by the magnetic force of the magnet 12.
[0014]
Unlike the present embodiment, the load cell 11 may have, for example, a suction cup instead of a magnet. In this case, the load cell 11 can be attached to and detached from the door by the suction cup.
[0015]
The angular velocity sensor 100 is attached to a door of an automobile and measures a time change of the opening / closing angle of the door as an angular velocity ω. Preferably, each speed sensor 100 is a gyro-type angular speed sensor that measures the angular speed ω based on the Coriolis force. The angular velocity sensor 100 is also provided with a magnet 110, and is attachable to and detachable from the door by the magnetic force of the magnet 110. In the angular velocity sensor 100, a suction cup may be provided instead of the magnet, and the suction cup may be detachable from the door.
[0016]
The PC 200 functions as determination means, and analyzes the load value measurement data (voltage value) received from the load cell 11 and the angular velocity sensor 100 via the cables 30 and 300 and the measurement data of the angular velocity ω. By doing so, it is determined whether or not the closed door is in a half-door state. Further, the PC 200 calculates the speed at which the door is closed based on the angular speed ω measured by the angular speed sensor 100, and calculates the amount of movement of the door based on this speed. Based on these results, the PC 200 evaluates the door closing performance.
[0017]
Here, “the speed at which the door is closed” is preferably a moving speed of the door portion where the door lock mechanism is provided on the door (hereinafter referred to as “door speed”). “Evaluation of door closing performance” means that when the door is closed at an appropriate speed, the closed door is securely closed without being a half-door (hereinafter referred to as “fully closed”). It means to determine whether or not. In other words, the “door closing performance” corresponds to the door speed necessary for the closed door to be in a fully closed state. Of course, the lower the required door speed, the higher the door closing performance.
[0018]
FIG. 2 is a block diagram showing a schematic configuration of the door closing inspection apparatus 10.
[0019]
As shown in FIG. 2, the PC 200 includes an interface 210, an A / D converter (ADC card) 220, a RAM 230, a ROM 240, a processor 250, a display 260, and a hard disk 270.
[0020]
The interface 210 electrically connects the PC 200 to the load cell 11 and the angular velocity sensor 100, and receives measurement data of the load and the angular velocity ω measured by the load cell 11 and the angular velocity sensor 100.
[0021]
The A / D converter 220 converts the load and angular velocity ω measurement data received via the interface 210 from analog data to digital data.
[0022]
The RAM 230 is a memory that temporarily stores the measurement data of the load and the angular velocity ω converted into digital data, and also functions as a working area when analyzing the change of the load and the change of the angular velocity ω.
[0023]
The ROM 240 is a memory for storing control programs and parameters in advance.
[0024]
The processor 250 executes various calculations and controls based on the obtained load and angular velocity ω measurement data. The processor 250 is in charge of determination at the start of inspection, half-door determination, door speed calculation, and movement amount calculation.
[0025]
The display 260 displays the processing result obtained by the processor 250. The processing result includes, for example, a determination result of whether or not the door is in a half door state, a calculated door speed value, a door movement amount, and / or an evaluation result of door closing performance.
[0026]
The hard disk 270 stores the above processing result as a data file. The hard disk 270 also has a role of storing a program executed by the processor 250.
[0027]
Although not shown, a printer or the like may be further provided so that the evaluation result can be printed out.
[0028]
The flow of data in the inspection apparatus 10 configured as described above is such that signals (analog data) from the load cell 11 and the angular velocity sensor 100 are input to the A / D converter 220, where digital load and angular velocity ω measurement data are measured. Is converted to The load and angular velocity ω measurement data converted into digital data are temporarily stored in the RAM 230 (memory). Then, the processor 250 analyzes the temporarily stored measurement data and executes various processes such as determination at the start of inspection, half-door determination, and door speed calculation. The processing result is displayed on the display 260 and stored in the hard disk 270.
[0029]
FIG. 3 is an explanatory diagram for explaining a state in which the load cell 11 and the angular velocity sensor 100 are attached to the door of the automobile.
[0030]
One end of the door 400 of the automobile to be inspected is connected to the automobile body via a hinge 410. As a result, the door 400 is rotatable about the vehicle body. A door lock mechanism 420 is provided near the other end of the door 400. The door 400 is locked by meshing between the door lock mechanism 420 and a striker provided on the pillar portion on the automobile body side. In this specification, the distance between the hinge 410 of the door and the door lock mechanism 420 is defined as a door length r.
[0031]
Although FIG. 4 shows a case where the load cell 11 and the angular velocity sensor 100 are attached to the front door, the present invention is not limited to such a case. The same applies to other doors such as a rear door and a back door.
[0032]
Here, the mounting positions of the load cell 11 and the angular velocity sensor 100 will be described.
[0033]
According to the inspection apparatus in the present embodiment, the load cell 11 and the angular velocity sensor 100 can measure the load when the door is closed without depending on the mounting position thereof, and the angular velocity. The sensor 100 can measure the angular velocity and calculate the door speed therefrom.
[0034]
Regarding the load to be measured, as a function of the load cell 11, the load applied to the door 400 is output as an electric signal (voltage value) according to the acceleration when the door to which the load cell 11 is attached is closed. For this reason, the attachment position with respect to the door 400 may be anywhere.
[0035]
Also, since the angular velocity sensor 100 is measuring the angular velocity of the door, it can also measure the angular velocity wherever it is attached to the door.
[0036]
FIG. 4 is a diagram for explaining the calculation principle of the door speed.
[0037]
As described above, the angular velocity sensor 100 measures the angular velocity ω of the door. Here, the angular velocity ω is a change amount per unit time with respect to the opening / closing angle θ of the door 400, and is represented by ω = dθ / dt. Here, since the door opening / closing angle θ is the same at any point on the door surface, the angular velocity sensor 100 can measure the same angular velocity ω on the door surface. The door speed is calculated by multiplying the angular speed ω by the door length r. Then, the amount of movement of the door is calculated by integrating the calculated speed with time.
[0038]
FIG. 5 is a flowchart showing a processing procedure by the door closing inspection device 10 of the present embodiment.
[0039]
In the door closing inspection procedure, first, the load cell 11 and the angular velocity sensor 100 are attached to the door 400 (S100). Specifically, the load cell 11 and the angular velocity sensor 100 are attached to the door 400 by the magnetic force of the magnets 12 and 110 provided on the back surfaces of the load cell 11 and the angular velocity sensor 100, respectively.
[0040]
And the door length r mentioned above is input (S101). This door length r is used to calculate the door speed. In addition, by employ | adopting the structure which inputs the door length r, the test | inspection apparatus of this invention can be applied with respect to several vehicle types from which the door length r differs, and the versatility of a test | inspection apparatus improves.
[0041]
Next, actual evaluation processing is executed. First, it is determined whether or not it is in the inspection start state (standby state) (S102). Whether or not the inspection is in a starting state is determined by a load value (actual data is a voltage value) measured by the load cell 11 (details will be described later). Alternatively, the determination may be made based on the value of the angular velocity ω measured by the voltage value angular velocity sensor 100.
[0042]
When the inspection is started, the operator once opens the door 400 and then pushes the door 400 to close it.
[0043]
As a result, the load cell 11 measures the load applied to the door by the operator's door closing operation (details will be described later). Then, it is determined that the door 400 is in an inspection start state by detecting an increase in load (S102: YES).
[0044]
Further, in the case of the determination of the inspection start based on the angular velocity ω, if the door closing direction is a positive direction, the state in which the angular velocity ω shows a negative value continues for a relatively long time during the door opening operation (S in FIG. 6). Area reference). Therefore, for example, when the angular velocity ω measured by the angular velocity sensor 100 shows a negative value for a predetermined time (for example, 0.3 seconds) or longer, it may be determined that the door 400 has entered the inspection start state. .
[0045]
In this way, after it is determined that the door 400 is in the inspection start state (S102), the initialization process is executed (S103). After the initialization process is executed, a new measurement is started. The initialization process includes, for example, initialization of variables used for the process, clearing of the primary storage area in the RAM 230, and securing of a new area when the evaluation result is stored in the hard disk.
[0046]
Simultaneously with the initialization, the load cell 11, the angular velocity sensor 100, the load during the door closing operation, and the angular velocity ω are measured (S104). The load measurement data and the angular velocity ω measurement data are input to the PC 200, converted from analog data to digital data, and then temporarily stored in the RAM 230 in time series (S105).
[0047]
Subsequently, the processor 250 analyzes changes in the load and the angular velocity ω accompanying the door closing operation using the load measurement data and the angular velocity ω measurement data stored in time series (S106).
[0048]
Here, the analysis processing in step S106 will be described in detail with reference to FIGS.
[0049]
First, with reference to FIG. 6, the change of the angular velocity ω accompanying this door closing operation will be described. FIG. 6 is a diagram showing a change in the angular velocity ω measured from when the door 400 is opened to when it is closed.
[0050]
First, when the operator pushes the door 400 in the closing direction, the angular velocity ω shows a positive value as shown in the region M of FIG. When the door 400 rotates and the door lock mechanism 420 comes into contact with the striker provided on the pillar side of the automated person, the value of the angular velocity ω rapidly decreases, and the angular velocity ω first becomes zero during the door closing operation. This is the state of point A. Thereafter, the door 400 is inverted by the repulsive force, and as a result, the angular velocity ω takes a negative value (this state is referred to as an inverted state). Thereafter, the state of the point B where the angular velocity ω becomes zero is obtained, and the angular velocity ω again takes a positive value. Thus, the area after the point A is an area where the angular velocity ω changes periodically. Here, the change in the angular velocity ω after the above point A shows different behavior depending on whether or not the door is in a half-door state.
[0051]
Then, the door speed r is calculated by multiplying the angular speed by the door length r.
[0052]
FIG. 7 is a diagram showing an actual measurement value of the door speed when the closed door is in a half-door state, and FIG. 8 is an actual measurement value of the door speed when the closed door is in a fully closed state. FIG. Note that the door speed and the angular speed ω only differ depending on whether or not a constant (door length r) is multiplied. Therefore, the characteristic of the measured value of the angular speed ω is that of the door speed shown in FIGS. The characteristics are the same.
[0053]
In general, the characteristics differ depending on the vehicle type, but in the example shown in FIGS. 7 and 8, the door is in a half-door state (FIG. 7) and the door is in a completely closed state. Compared to (FIG. 8), the time from the point in time when the door speed during the closing operation becomes zero (point A) to the point in time when it next becomes zero (point B) becomes longer.
[0054]
As described above, the change in the angular velocity ω differs depending on whether the door is in the half-door state or the fully-closed state. The main point is that the latch of the door lock mechanism 420 is engaged with the striker provided on the pillar side of the automobile. It is based on the difference. The difference between the half door state and the fully closed state will be described later.
[0055]
The amount of movement of the door is calculated by integrating the door speed obtained as described above with time.
[0056]
FIG. 9 is a diagram in which the change in the load amount when the closed door is in a half-door state is made to correspond to the movement amount obtained from the door speed, and FIG. 10 is a diagram showing that the closed door is in the fully closed state. It is the figure which made the change of the load amount in the case of becoming correspond to the movement amount calculated | required from the door speed. In each figure, the vertical axis represents the amount of load, but the voltage value is amplified by an amplifier. Therefore, the unit does not have a unit corresponding to the voltage value, not the output voltage value of the load cell 11 itself. On the other hand, the horizontal axis represents the amount of door movement obtained by integrating the previous door speed. Moreover, in each figure, (b) figure is an enlarged view of the part in a circle in (a) figure.
[0057]
Comparing FIG. 9 and FIG. 10, first, a large load is applied to both at the beginning of the door movement. This is a load applied to the door by the operator to close the door (between A and B in the figure). Thereafter, when the worker releases the door, the load applied to the door disappears, and the load value also decreases to approximately 0 (between B and C). Thereafter, the load value rapidly rises again and once shows a peak, and then becomes 0 (between C and D). The peak of the load value between C and D is due to the reaction force received from the pillar portion when the door is closed.
[0058]
Then, it can be seen that there is a difference in the peak value of the load value between CDs when the door is half-door (FIG. 9) and when it is completely closed (FIG. 10). Therefore, it is possible to determine whether or not the closed door is in a half-door state from the maximum value of the load value between the CDs, that is, from the position where the door is closed and stopped. Specifically, a threshold value is provided between the peak values of the two, and when it is equal to or greater than this threshold value, it is determined that the door is completely closed, and when it is less than the threshold value, it is determined that the door is in a half-door state. The threshold value is set when the vehicle model to be measured is different, the door to be measured is different even with the same vehicle model, or the soundproof / waterproof seal member is changed or the hinge member is changed. If so, set appropriate values for each.
[0059]
In the above description, the movement amount of the door is calculated based on the angular velocity obtained by the angular velocity sensor, and the load change corresponding to the movement amount is graphed (FIGS. 9 and 10). In operation, such a graph need not be used to determine whether or not it is a half-door (although such graphing may of course be performed as part of door performance evaluation). The obtained angular velocity is time-integrated in the reverse direction from the position where the door is closed and stopped to obtain the door speed, and the door speed is also time-integrated in the same reverse direction, so that the door is closed and stopped. A range before the predetermined range may be obtained, and the maximum value (peak value) of the load values within the range may be compared with a threshold value to determine whether the door is a half door.
[0060]
Further, in order to more simply determine whether or not the door is a half door, the determination may be made based only on the load change value. As shown in FIGS. 9 and 10, the change in the load value increases greatly at first when the door is closed (between A and B), and then decreases and becomes almost zero (between B and C). Then, since a steep peak value appears due to the reaction force that the door finally hits the pillar part (between CD), for example, the load value decreases after rising during the door closing operation. After that, when the maximum value when it rises again is less than a predetermined threshold value, it may be determined that the closed door is in a half-door state. Note that the change in the load value rises after the first rise and then decreases, and there is a slight change in the load value between B and C, particularly in the portion that is almost zero, but these values are caused by the vibration of the door. Because it is a value that is much lower than the peak value when the door is closed and does not reach the set threshold value, the peak load value due to the reaction force hitting the pillar when the door is closed It is not mistakenly judged.
[0061]
Therefore, when determining whether or not the door is a half door only from the change of the load value, the angular velocity sensor need not be used for the half door determination.
[0062]
As described above, in the present embodiment, it is determined whether or not the door is a half door based on the load value measured by the load cell 11.
[0063]
Here, the difference between a half door and a complete closure will be described.
[0064]
FIG. 11 is a schematic diagram for explaining the difference between the half door state and the completely closed state. FIG. 11A shows the case of a completely closed state, and FIG. 11B shows the case of a half-door state.
[0065]
As shown in FIG. 11A, in the fully closed state, the latch 422 of the door lock mechanism 420 and the striker 430 on the pillar side are engaged with each other at a normal engagement position and are in a fully latched state. Therefore, the position of the striker 430 is relatively firmly fixed, and the movement range (stroke) of the striker 430 is also relatively limited. As a result, the vibration range of the door is also limited, so that the state where the door speed (or angular speed ω) is a negative value does not last long.
[0066]
On the other hand, as shown in FIG. 11B, in the half door state, the latch 422 and the striker 430 of the door lock mechanism 420 do not reach the normal meshing position and are in the half latch state. . Therefore, the position of the striker 430 is not limited as compared with the case of the completely closed state, and the movement range of the striker 430 is relatively wide. As a result, the state in which the door speed (or angular speed ω) is negative is longer than that in the fully closed state.
[0067]
As described above, after analyzing whether the closed door is a half door by the analysis process (S106), the process by the processor 250 proceeds to step S107 in FIG. It is determined whether or not the door is in a half door state. If it is determined that the door is in the half-door state (S107: YES), a message to that effect is displayed on the display 260 (S108). The worker sees an indication that the door is in a half-door state and redoes the door closing operation. Since the operator reopens the door once closed, it is determined that the inspection is in a start state (S102: YES), and therefore, the processes in and after step S103 are repeatedly executed.
[0068]
On the other hand, when it is determined that the closed door is not in the half-door state (S107: NO), the processor 250 calculates the door closing operation calculated by multiplying the angular velocity ω measured by the angular velocity sensor 100 by the door length. The door performance is evaluated based on the inside door speed and the amount of door movement.
[0069]
This evaluation is performed by determining whether the calculated average door speed for a predetermined distance before the door closing position is equal to or less than a predetermined specified value. That is, in this processing step, when the door 400 is strongly closed at a speed exceeding the specified value, even if the door 400 has a low door closing performance, the door 400 is not in a half-door state and the significance of the inspection is lost. The point is taken into consideration. The prescribed value is appropriately determined according to the internal specification of the door closing performance or the specification with the customer.
[0070]
As a result of the determination, when it is determined that the calculated speed exceeds the specified value (S110: NO), the display 260 displays that the speed is not specified (S111). As a result, the operator knows that the speed is out of regulation and can redo the door closing operation. Since the operator reopens the door once closed, it is determined that the inspection is in a start state (S102: YES), and therefore, the processes in and after step S103 are repeatedly executed.
[0071]
On the other hand, when it is determined that the calculated speed is equal to or less than the specified value (S110: YES), the display 260 displays the result (S112). That is, it is confirmed that when the door is closed at a speed within an appropriate range, the closed door does not become a half-door state. As a result, the door closing performance evaluation inspection is completed. The display 260 displays the door speed when the fully closed state is realized, and displays that the door closing performance has passed. Further, each calculation result and determination result are recorded in the hard disk 270 (S113).
[0072]
As described above, according to the present embodiment, since it is determined whether or not it is a half door based on the load value obtained by the load cell attached to the door, the half door determination can be automatically performed. It becomes possible. The load cell is detachable from the door with a magnet or suction cup, so it can be easily attached to the door, and the installation position can be anywhere on the door, and there is no need for alignment when installing. Therefore, the preparation time for door performance evaluation can be greatly shortened.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a door closing inspection apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a schematic configuration of the door closing inspection device.
FIG. 3 is a diagram illustrating a state in which a load cell and an angular velocity sensor included in the door closing inspection apparatus are attached to a door of an automobile.
FIG. 4 is a diagram showing a relationship between an attachment position of an angular velocity sensor and a door opening / closing angle.
FIG. 5 is a flowchart showing a processing procedure by the door closing inspection device.
FIG. 6 is a diagram showing a change in angular velocity ω measured from when the door is opened to when it is closed.
FIG. 7 is a diagram showing a change in door speed when the closed door is in a half-door state.
FIG. 8 is a diagram showing a change in door speed when the closed door is in a completely closed state.
FIG. 9 is a diagram showing a change in load value when the closed door is in a half-door state.
FIG. 10 is a diagram showing a change in load value when a closed door is in a completely closed state.
FIG. 11 is a schematic view showing the state of the door lock mechanism and the striker in order to explain the difference between the half door state and the fully closed state.
[Explanation of symbols]
10 ... Door closing inspection device,
11 ... load cell,
100: Angular velocity sensor,
12, 110 ... magnets,
200 ... Computer,
210 ... interface,
220 ... A / D converter,
230 ... RAM,
240 ... ROM,
250 ... processor,
260 ... display,
270: Hard disk,
30, 300 ... cable,
400 ... door.

Claims (5)

A load measuring means attached to the door and measuring a load generated with the movement of the door;
Determination means for determining whether the door is in a half-door state based on a change in the load value measured by the load measuring means;
A door closing inspection device characterized by comprising: Furthermore, it has an angular velocity measuring means that is attached to the door and measures a change in the door opening / closing angle as an angular velocity,
The determination means calculates the door speed during the door closing operation from the angular speed measured by the angular speed measurement means and the door length input in advance, and obtains the amount of movement of the door from the calculated speed, When the maximum load value measured by the load measuring means within a predetermined range from the position where the door is closed and stopped among the movement amount of the door is equal to or less than a predetermined threshold value The door closing inspection apparatus according to claim 1, wherein the door closed to the door is determined to be in a half-door state. The determination means determines whether the door closed when the load value measured by the load measurement means rises and then falls during the door closing operation and then rises again is less than or equal to a predetermined value. The door closing inspection device according to claim 1, wherein the door closing inspection device is determined to be in a half door state. The door closing inspection device according to any one of claims 1 to 3, wherein the load measuring unit includes a magnet that is detachable from the door. The door closing inspection device according to any one of claims 1 to 3, wherein the load measuring means includes a suction cup for making the door detachable.

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