JP3501346B2 - Door pinch detection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door pinch detection device for detecting that a part of a body or belongings is pinched when a vehicle door is closed.

[0002]

In order to ensure the safety of passengers in a vehicle such as a train or a bus, it is necessary to prevent a part of the body or belongings from being caught when the vehicle door is closed. A door pinch detection device for detecting is provided. This door pinch detection device is provided with a door tip rubber at the tip of the vehicle door, and detects whether the door tip rubber is pressed when the vehicle door is closed. It is to detect that. That is, this door pinch detection device, when a part of the body or belongings are pinched when the vehicle door is closed, the door tip rubber is pressed in an abnormal state, so that the door tip rubber By detecting the change in the pressed state, it is possible to detect the door pinching state.

By the way, in such a door pinching detection device, when detecting whether or not the door is pinched, it is necessary to supply electric power from the vehicle body side to the vehicle door side, and also for the vehicle door. It is necessary to transmit a detection signal from the door side to the vehicle body side, which indicates that the door is in the state of being pinched. Therefore, the conventional one connects the vehicle body side and the vehicle door side with a cable,
Power is supplied and a detection signal is transmitted and received between the vehicle body side and the vehicle door side via a cable. In this case, as the cable, since the vehicle door frequently reciprocates to open and close the entrance and exit, and flexes accordingly, a cable having sufficient durability against flexion has been adopted. .

However, even if such a cable has sufficient durability against bending, it is unavoidable that the cable may be broken due to fatigue or deterioration. Therefore, such a cable is adopted. The structure is not reliable in terms of ensuring passenger safety. In particular, when the cable is broken in the state of being caught in the door, there is a possibility that the vehicle may start with the body being caught, for example.

Therefore, in order to solve such a problem, a method of supplying electric power and transmitting / receiving a detection signal between the vehicle body side and the vehicle door side by utilizing electromagnetic induction coupling can be considered. In this case, as a specific configuration, a resonance circuit including a capacitor and a coil is provided on both the vehicle body side and the vehicle door side, and electromagnetic induction coupling is established by these resonance circuits to supply power or detect signals. It is possible to send and receive. This makes it possible to eliminate the need for a cable that connects the vehicle body side and the vehicle door side, and with this,
It is possible to ensure the safety of passengers without breaking the cable.

However, in this configuration, as described above, the resonance circuits are attached to the vehicle body side and the vehicle door side, respectively, and in this case, considering that the vehicle body and the vehicle door are made of metal. However, there is a problem that the electrical characteristics of the coil forming the resonance circuit are affected by the metal and change. Therefore, even if the inductance of the coil is adjusted so that the resonance point becomes the optimum position before the coil is attached to the vehicle body side and the vehicle door side, after the coil is attached to the vehicle body side and the vehicle door side, The inductance is decreased and the DC resistance is increased, so that the resonance point is deviated from the optimum position. If this happens, the power supplied to the coil will drop, making it impossible to supply power accurately, or the communication efficiency of the detection signal will drop, making it impossible to send and receive detection signals accurately. It will be.

Under these circumstances, it is necessary to adjust the inductance of the coil so that the resonance point becomes the optimum position after the coil is attached, not before the coil is attached. However, in this case, the coil is attached. Since the adjustment is performed while moving the place, the work efficiency is extremely poor. Further, if an abnormality occurs for some reason, the inspection is performed with the coil attached, which is extremely inconvenient.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to ensure the safety of passengers by accurately detecting whether or not a door is in a trapped state. Moreover, it is an object of the present invention to provide a door pinch detection device that does not reduce work efficiency in mounting and can easily perform an inspection.

[0009]

A door pinch detection device of the present invention includes a power supply means provided on the vehicle body side and a first case attached to a first attachment location near the vehicle entrance / exit. And a first coil housed in the first case, to which AC power is supplied from the power supply means, and a second coil mounting position on the vehicle door side that opens and closes an entrance / exit of the vehicle body. A second case, a second coil housed in the second case and electromagnetically coupled with the first coil; and a second coil provided on the vehicle door side and provided with the first coil and the first coil. When the second coil is electromagnetically inductively coupled , the AC power generated by the second coil is determined.
A constant voltage circuit that generates a voltage and the vehicle door side are provided, and detection is performed based on the constant voltage generated by the constant voltage circuit , and the detected value is determined in advance.
Whether it is in the door-to-door state based on comparison with the judgment value
At least in the first case, and a detection means for determining whether or not the detection result is transmitted to the vehicle body side by electromagnetic induction coupling between the first coil and the second coil. The first mounting portion side is formed of a material having a magnetic permeability equal to or higher than the magnetic permeability of the material of the first mounting portion, and at least the second mounting portion side of the second case. Is characterized in that it is formed of a material having a magnetic permeability equal to or higher than the magnetic permeability of the material of the second mounting portion (claim 1).

According to this structure, when the first coil provided on the vehicle body side and the second coil provided on the vehicle door side are electromagnetically inductively coupled, on the vehicle door side,
The constant voltage circuit is generated by the second coil in response to the electromagnetic induction coupling between the first coil and the second coil.
Generating a constant voltage from the AC power has, detection means, a constant voltage times
Performs detection based on the constant voltage generated by the road, the
The detected value detected can be compared with a predetermined judgment value.
It is judged based on the
A detection signal indicating the determination result is transmitted to the vehicle body side by electromagnetic induction coupling between the first coil and the second coil.

As described above, the electromagnetic induction coupling between the first coil provided on the vehicle body side and the second coil provided on the vehicle door side causes an alternating current from the vehicle body side to the vehicle door side.
Since the power is supplied and the detection signal is transmitted from the vehicle door side to the vehicle body side, unlike the conventional one, a cable for connecting the vehicle body side and the vehicle door side is unnecessary. Therefore, the cable is not broken. As a result, it is possible to accurately detect whether or not the vehicle is in the door-to-door state, so that the safety of passengers can be surely ensured and the reliability can be improved.

At this time, the first case for accommodating the first coil is to be attached to the first attachment portion near the vehicle entrance / exit, and at least the first attachment portion of the first case is attached. Since the magnetic permeability of the material on the side of is equal to or higher than the magnetic permeability of the material of the first mounting location, when mounting the first case to the first mounting location, before and after mounting,
The inductance does not decrease, the DC resistance does not increase, and the resonance point does not shift.

Thus, the coil inductance can be adjusted so that the resonance point is at the optimum position before the first case is attached to the first attachment point. Therefore, the adjustment work is performed after the attachment. There is no need, and work efficiency does not decrease. In addition, when an abnormality occurs due to some reason, the first case can be removed from the first attachment point and the inspection can be performed, so that the inspection can be easily performed.

The relationship between the second case for accommodating the second coil and the second mounting location on the vehicle door side is similar to this, so that the second case is the second case. The coil inductance may be adjusted so that the resonance point is located at the optimum position before the mounting at the mounting location, and there is no need to perform the adjusting work after mounting, so that the work efficiency does not decrease. In addition, when an abnormality occurs due to some reason, the second case can be removed from the second attachment point and the inspection can be performed, so that the inspection can be easily performed.

In addition, in the door pinch detection device having the above-described structure, the first pin is provided by controlling the level of the AC power that is provided on the vehicle body side and is supplied to the first coil.
Controlling the level of electromagnetic inductive coupling between the coil and the second coil, and generating a signal pattern based on the level change of the electromagnetic inductive coupling. By determining the signal pattern generated by the first signal pattern generating means ,
It may be configured to initiate a discovery (claim 2).

According to such a structure, on the vehicle body side, the first signal pattern generating means controls the level of the AC power supplied to the first coil to thereby control the first coil and the second coil. And a signal pattern is generated based on a change in the level of the electromagnetic induction coupling, and on the vehicle door side, the detection means is generated by the first signal pattern generation means. to determine the signal pattern, to start the discovery.

[0017] exchange this way, from the vehicle body side to the vehicle door side
Supplies flow power, it is possible to identify the start timing of the discovery by using the signal patterns due to the level change of the electromagnetic induction coupling, separately, a configuration for generating a signal for identifying the start timing of the detection Since it is not necessary to provide it, the structure can be simplified accordingly.

Further, in the door pinching detection device having the above-mentioned structure, the first coil and the second coil are provided by controlling the level of the AC power provided on the vehicle door side and supplied to the second coil. A second signal pattern generating means for controlling the level of electromagnetic inductive coupling with the coil and generating a signal pattern based on a change in the level of the electromagnetic inductive coupling. Second
The signal pattern may be generated by the signal pattern generated by the signal pattern generating means (3).

According to such a configuration, on the vehicle door side, the second signal pattern generating means controls the level of the AC power supplied to the second coil to thereby control the first coil and the second coil. Controlling the level of electromagnetic inductive coupling with the coil, and generating a signal pattern on the basis of the level change of the electromagnetic inductive coupling, and the detecting means outputs the detection signal to the signal generated by the second signal pattern generating means. Generate by pattern.

As described above, since it is possible to identify the detection signal, that is, the determination result of whether or not the door is in the trapped state, by using the signal pattern due to the level change of the electromagnetic induction coupling, the determination result is separately identified. It is not necessary to provide a configuration for generating a signal for doing so, and the configuration can be simplified accordingly.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a train will be described below with reference to the drawings. ◎ First, Figure 2
In the vehicle 1, the vehicle body 2 is provided with the vehicle door 3. The entrance / exit 4 of the vehicle body 2 is opened / closed in response to the vehicle door 3 reciprocating in the directions of arrows A1 and A2 in FIG. In this case, the vehicle body 2 and the vehicle door 3 are mainly made of iron material.

The door pinching detection device 5 comprises a controller 6, a terminal 7 and a unit 8. The controller 6 is mounted under the floor of the vehicle body 2, and the terminal 7 is mounted above the entrance / exit 4. Further, the unit 8 is attached to the upper portion of the vehicle door 3.
Of these, the controller 6 and the terminal 7 include the cable 9, the nylon connectors 10 and 11 and the cable 12.
Connected through. In FIG. 2, the controller 6 and the terminal 7 corresponding to the vehicle door 3 on the left side in FIG.
Also, only the unit 8 and the like are shown, and a controller, a terminal, a unit, and the like corresponding to the vehicle door 3 on the right side are omitted in the drawing.

Next, a specific structure of the terminal 7 will be described with reference to FIGS. 3 and 4. Figure 3
Shows a plan view (a) and a front view (b) of the terminal 7, and FIG. 4 shows an exploded view of the terminal 7. The case 13 (first case in the present invention) of the terminal 7 is formed by combining an iron main case 14a and a resin cover 14b.
Inside a, a printed wiring board 15 on which various electronic components such as a capacitor, a resistor, and an NPN type transistor are mounted, as will be described later in detail, and a coil 17 wound around a bobbin 16 (first in the present invention). The cover 14b is bolted to the main case 14a by the bolts 18 in a state in which the coil of FIG.

The cable 12 is connected to a predetermined portion of the terminal 7, and the nylon connector 11 is provided at the tip of the cable 12 (see FIG. 2). The cable 12 is omitted in FIG. In this case, when power is supplied to the coil 17 and an electromagnetic field is generated from the coil 17, the electromagnetic field is transmitted to the space through the cover 14b because the main case 14a is made of iron and the cover 14b is made of resin. It is supposed to be emitted.

Next, a specific structure of the unit 8 will be described with reference to FIGS. 5 and 6. Figure 5
A plan view (a), a front view (b) and a side view (c) of the unit 8 are shown, and FIG. 6 shows an exploded view of the unit 8. The case 19 of the unit 8 (the second in the present invention)
Is a combination of an iron main case 20b integrally formed with a mounting portion 20a and a resin cover 20c. Inside the main case 20b, a capacitor and a resistor will be described in detail later. A printed wiring board 21 on which various electronic components such as an NPN transistor are mounted is bolted by a bolt 22 via a nut 22a, and a pressure sensor 23 electrically connected to the printed wiring board 21 is screwed by a screw 24. The coil 26 is screwed by the coil 26 and wound around the bobbin 25.
The cover 20c is configured to be bolted to the main case 20b with bolts 27 with the (second coil according to the invention) being provided.

The pressure sensor 23 is provided with nylon connectors 28 and 29 as two pressure ports,
The nylon connectors 28 and 29 are the main case 2
It projects from 0b. In this case, when power is supplied to the coil 26 and an electromagnetic field is generated from the coil 26, the electromagnetic field is transmitted to the space through the cover 20c because the main case 20b is made of iron and the cover 20c is made of resin. It is supposed to be emitted.

FIG. 7 is a plan view (a), a front view (b) and a side view (c) showing a state where the terminal 7 is attached to the vehicle body 2 and a state where the unit 8 is attached to the vehicle door 3. ) Is shown. Iron plate 3 that constitutes the vehicle body 2
Two mounting plates 31 are attached and fixed to the inner wall surface 30a of No. 0 by welding.
The main case 14a is fixed to the inner wall surface 30a of the iron plate 30 such that the main case 14a and the inner wall surface 30a (the first mounting portion in the present invention) face each other by being screwed to the first case. At this time, since the main case 14a and the inner wall surface 30a of the iron plate in the terminal 7 are made of the same material, they have the same magnetic permeability.

The unit 8 has the mounting portion 20a of the main case 20b screwed to the upper portion of the vehicle door 3, so that the main case 20b and the upper surface portion 3a of the vehicle door 3 (the first in the present invention). 2 is attached and fixed to the upper surface portion 3 a of the vehicle door 3. At this time, the main case 20b of the unit 8 and the upper surface portion 3a of the vehicle door 3 are made of the same material, and therefore have the same magnetic permeability. In this case, when the vehicle door 3 reciprocates in the directions of arrows A1 and A2 in FIG. 2, the unit 8 reciprocates along the longitudinal direction of the terminal 7.

When the vehicle door 3 is in the door closing position where the entrance / exit 4 is closed, that is, in the state shown in FIG. 2 described above, the terminal 7 and the unit 8 correspond to each other as shown in FIG.
As shown in the middle (a), the positional relationship is such that the coil 17 disposed inside the terminal 7 and the coil 26 disposed inside the unit 8 face each other. On the other hand, when the vehicle door 3 is in the door open position where the entrance 4 is open, the terminal 7 and the unit 8 are
Means a positional relationship where they do not face each other as shown in FIG. 8B, that is, the coil 17 and the coil 26 do not face each other.

FIG. 9 shows the structure of the main part of the vehicle door 3. At the front end portion (door end portion) of the vehicle door 3, a door end rubber 32 is provided over the entire upper end portion to the lower end portion of the vehicle door 3. As shown in FIG. 10, the door tip rubber 32 integrally includes a door contact portion 33 having a substantially semicircular cross section and a mounting portion 34 having a substantially rectangular cross section. The mounting portion 34 is inserted and fixed in a recess formed in the tip portion of the vehicle door 3, whereby the door tip rubber 3 is provided.
2 is fixed to the tip of the vehicle door 3. Further, the door stop portion 33 projects from the end surface of the vehicle door 3,
As a result, when the vehicle door 3 is closed, that is, when the vehicle door 3 and the vehicle door 3 paired with the vehicle door 3 collide with each other, the impact is softened.

In FIG. 10, a first connecting portion 33a is integrally formed on the inner bottom wall of the door stop 33 on the inside of the vehicle, and at the inner peripheral wall of the door stop 33 on the inside of the vehicle. The second connecting portion 33b is integrally formed with the. A cylindrical portion 33c is integrally formed at the tip ends of the first connecting portion 33a and the second connecting portion 33b, and the inside of the cylindrical portion 33c extends from the upper end portion to the lower end portion of the door tip rubber 32. It is a hollow portion 33d penetrating to the end. A restriction wall 33e is integrally formed on the inner bottom wall of the door stop 33 and outside the vehicle.

The upper end of the hollow portion 33d of the door stop 33 is
One end of the "L" -shaped silicon tube connecting pipe 35 is inserted and closed, and the lower end of the hollow portion 33d is double closed by the closing members 36 and 37,
Thereby, the air in the hollow portion 33d is sealed.
The other end of the silicone tube connecting pipe 35 is connected via a silicone tube 38 to a nylon connector 28 as one pressure port of the pressure sensor 23 arranged in the unit 8, whereby the pressure Sensor 2
3 is the pressure of the air in the hollow portion 33d of the door stop 33,
It can be detected through the silicon tube connecting pipe 35 and the silicon tube 38.

On the other hand, the mounting portion 34 is formed with a hollow portion 34a which penetrates from the upper end portion to the lower end portion of the door tip rubber 32. The upper end of the hollow portion 34a of the mounting portion 34 is
One end of the "L" -shaped silicon tube connecting pipe 39 is inserted and closed, and the lower end of the hollow portion 34a is double closed by the closing members 40 and 41,
As a result, the air inside the hollow portion 34a is sealed.
The other end of the silicone tube connecting pipe 39 is connected to the nylon connector 29 as the other pressure port of the pressure sensor 23 via the silicone tube 42, whereby the pressure sensor 23 is attached to the mounting portion 34. The air in the hollow portion 34a is pressurized by the silicon tube connecting pipe 3
9. It can be detected through the silicon tube 42.

Further, a core rubber 43 is provided above the door tip rubber 32, and a core rubber 44 (see FIG. 10) is provided below the door tip rubber 32. These core rubbers 43 and 44 act as a reinforcing member for the door stop portion 33 of the door tip rubber 32.

In the door-end rubber 32 thus constructed, when a force is applied to the door-stop portion 33 toward the outside of the vehicle, the door-stop portion 33 is elastically deformed, and the cylindrical portion 33c becomes the second connecting portion 33b. Although the movement is restricted by the restriction wall 33e at this time, the cylindrical part 33c is crushed, that is, the pressure of the air in the hollow part 33d. Will change drastically. On the other hand, when a force to the inside of the vehicle acts on the door stop 33, the cylindrical portion 33c is pulled toward the inside of the vehicle via the second connecting portion 33b, but at this time, the movement is not restricted, The cylindrical portion 33c is not crushed, that is, the pressure of the air in the hollow portion 33d does not change significantly.

Further, even when a force to the outside of the vehicle acts on the door stop 33 or a force to the inside of the vehicle, the mounting portion 34, as described above, Since it is inserted and fixed in the recess of the vehicle door 3, it is not elastically deformed, that is, the pressure of the air in the hollow portion 34a does not change.

Incidentally, the core rubber 43, 4 in the door end rubber 32
In the section in which 4 is provided, the door stop portion 33 does not have any effect even when a force to the vehicle exterior side acts on the door stop portion 33 or a force to the vehicle interior side acts. It is possible to detect whether or not a section other than this section without elastic deformation, that is, a section in the door tip rubber 32 in which the core rubbers 43 and 44 are not provided is in a door pinching state described in detail later. It has become a section.

Next, the controller 6 and the terminal 7
The electrical configuration of the unit 8 will be described with reference to FIG. First, the controller 6 is adapted to be supplied with power from a power supply device 45 (power supply means in the present invention) arranged at a predetermined position of the vehicle body 2. The input circuit 46 outputs a "door open signal" to the CPU 47 when the "door open signal" is given in response to the conductor opening the door, and also outputs "door close" in response to the conductor closing the door. When the "signal" is given, the "door closing signal" is sent to the CPU4.
It outputs to 7.

The output circuit 48 receives the "door-sandwich detection signal" from the CPU 47, which indicates the door-sandwich state, and outputs the "door-sandwich detection signal" to, for example, the output means (L) of the passenger compartment.
ED). When the demodulation data is given from the demodulation circuit 50 of the terminal 7, the filter circuit 49 removes the noise component from the demodulation data, and the demodulation data from which the noise component is removed becomes the oscillation frequency output from the oscillation circuit 51 of the terminal 7. CPU4 synchronously
It outputs to 7.

The CPU 47 is composed of a microcomputer, and by executing a stored program, the processing to be described in detail later is executed.

The terminal 7 is supplied with electric power from the power supply device 45 in the same manner as the controller 6. The oscillating circuit 51 generates electric power at a predetermined oscillating frequency and outputs the supplied electric power to the frequency dividing circuit 52. The frequency divider circuit 52 is the oscillator circuit 51.
When the electric power is given from, the given electric power is divided, and the divided electric power is output to the booster 53.

When the booster 53 is supplied with the frequency-divided power from the frequency-dividing circuit 52, the booster 53 amplifies the power, and the amplified power is applied to a series resonance circuit 55 in which a capacitor 54 and the coil 17 are connected in series. It is designed to output. The series resonance circuit 55 is configured to generate an electromagnetic field by the coil 17 when the amplified power is applied from the booster 53. The other side of the series resonance circuit 55 is
It is grounded through the resistor 56.

When the base current is applied from the CPU 47 of the controller 6 through the buffer 58, the NPN transistor 57 is turned on, and a part of the electric power charged in the capacitor 54 of the series resonance circuit 55 is partially removed by the resistor 59.
Is used as a collector current to reduce the power supplied to the coil 17 of the series resonance circuit 55.

With such a configuration, the CPU 47 of the controller 6 controls on / off of the base current supplied to the NPN transistor 57, and the series resonance circuit 5 is controlled.
By controlling the electric power supplied to the coil 17 of No. 5, the level of electromagnetic inductive coupling can be controlled. For example, a state in which the level is higher than a predetermined level is associated with the data “1”, and the level is predetermined. By associating a state smaller than the level with the data “0”, it is possible to transmit a signal pattern including the data “1” and “0” by electromagnetic inductive coupling. That is, the first signal pattern generating means 60 in the present invention comprises the CPU 47 of the controller 6, the NPN transistor 57 of the terminal 7 and the series resonance circuit 55.

The demodulation circuit 50 demodulates the reception data received by the coil 17 of the series resonance circuit 55 during electromagnetic induction coupling to generate demodulation data, and outputs the demodulation data to the filter circuit 49 of the controller 6. It is supposed to do.

In the unit 8, a parallel resonance circuit 62 in which the coil 26 and the capacitor 61 are connected in parallel.
The ( constant voltage circuit in the present invention) is designed to be electromagnetically inductively coupled with the series resonance circuit 55 of the terminal 7, and the AC power generated by the coil 26 at the time of the electromagnetically inductive coupling is applied to the capacitor 61. It is designed to be charged.

The full-wave rectification circuit 63 rectifies the AC power charged in the capacitor 61 to generate DC power, and outputs the DC power to the constant voltage circuit 64. When the DC power is applied from the full-wave rectifier circuit 61, the constant voltage circuit 64 converts the applied DC power into a constant voltage,
The electric power converted into the constant voltage is output to the CPU 65.

The clock extraction circuit 66 is the parallel resonance circuit 6
A clock signal synchronized with the AC power charged in the second capacitor 61 is generated and the clock signal is output to the AND circuit 67. Further, the demodulation circuit 68 demodulates the reception data received by the coil 26 of the parallel resonance circuit 62 during the electromagnetic induction coupling to generate demodulation data,
The demodulated data is output to the CPU 65.

The NPN transistor 69 is the CPU 65.
When a base current is given from the above through the AND circuit 67, it is turned on, and a part of the electric power charged in the capacitor 61 of the parallel resonant circuit 62 becomes a collector current through the resistor 70, whereby the parallel current is generated. The power supplied to the coil 26 of the resonance circuit 62 is reduced.

With such a configuration, the CPU
The on-off control of the base current supplied to the NPN transistor 69 and the power supplied to the coil 26 of the parallel resonance circuit 62 can control the level of electromagnetic inductive coupling, for example, the level 65. Is associated with data “1” when the state is greater than a predetermined level, and data “0” is associated with the state where the level is less than the predetermined level.
A signal pattern consisting of "0" can be transmitted by electromagnetic induction coupling. That is, the second signal pattern generation means 71 according to the present invention uses these C
It is composed of a PU 65, an NPN transistor 69 and a parallel resonance circuit 62.

As described above, the pressure sensor 23 is provided with the two nylon connectors 28 and 29 as pressure ports, and the air in the hollow portion 33d of the door stop portion 33 of the door tip rubber 32 is provided. The pressure is detected, the pressure of the air in the hollow portion 34a of the mounting portion 34 is detected, and the detection results are output to the CPU 65.

The variable resistor 72 is provided as a sensitivity adjusting means, and as will be described later in detail, the CPU 6
5 adopts the value set by the variable resistor 72 as a judgment value and executes a predetermined process.

The CPU 65 is composed of a microcomputer, and executes a stored program to execute the processing described in detail later. Incidentally, the detection means 73 in the present invention
Is composed of the electronic components in the unit 8 described above.

Next, the operation of the above configuration will be described with reference to FIGS. 11 and 12. FIG. 11 shows the contents of processing executed by the CPU 47 of the controller 6, and FIG.
Shows the contents of the processing executed by the CPU 65 of the unit 8.

First, the CPU 47 of the controller 6
It is determined whether or not a "door open signal" is input (step S
1). Here, when the conductor conducts the operation of opening the vehicle door 3, the CPU 47 of the controller 6 comes to input the "door opening signal", so that "YE" in step S1.
S ”, and wait for a predetermined time (step S2). Here, this predetermined time is the time from when the vehicle door 3 starts moving from the door closed position to the door open position until a certain amount of time elapses.

When the CPU 47 of the controller 6 detects that a predetermined time has elapsed, it supplies electric power to the series resonance circuit 55 of the terminal 7 to generate an electromagnetic field from the coil 17 of the series resonance circuit 55 (step S).
3). At this time, the vehicle door 3 is moving from the door closed position to the door open position.

Now, in response to the generation of an electromagnetic field from the coil 17 of the series resonance circuit 55 in the terminal 7, an electromagnetic field is generated between the coil 17 of the series resonance circuit 55 and the coil 26 of the parallel resonance circuit 62 in the unit 8. When the inductive coupling is established, AC power is induced in the coil 26, the AC power is rectified by the full-wave rectification circuit 63 to generate DC power, and the DC power is fixed by the constant voltage circuit 64. Is converted into the data and is given to the CPU 65 of the unit 8.

The CPU 65 of the unit 8 is the constant voltage circuit 6
When a constant voltage equal to or higher than a predetermined level is given from 4, that is, when the power supply voltage is OK, it is determined to be "YES" in step S21 and a "wake-up signal" is transmitted by electromagnetic inductive coupling (step S22). At this time, the CPU 65 of the unit 8 causes the NP as described above.
By controlling the on / off of the base current supplied to the N-type transistor 69, a signal pattern made up of data "1" and "0" is generated, and this is generated as a "wakeup signal".
To send as.

Next, when the "wake-up signal" transmitted from the unit 8 is received by the terminal 7 as reception data by electromagnetic induction coupling, the reception data is demodulated, and the demodulation data is given to the CPU 47 of the controller 6, The CPU 47 of the controller 6 executes step S
It is determined to be "YES" in 4 and the "teaching start signal" is transmitted by electromagnetic induction coupling (step S
5). At this time, as described above, the CPU 47 of the controller 6 controls the base current supplied to the NPN transistor 57 to be turned on and off, thereby generating a signal pattern composed of data "1" and "0", and "teaching" it. As a start signal ".

Then, the "teaching start signal" transmitted from the terminal 7 is transmitted to the unit 8 by electromagnetic induction coupling.
When the received data is demodulated and the demodulated data is given to the CPU 65 of the unit 8, the CPU 65 of the unit 8 determines “YES” in step S23, and the rubber tip 32 at this time. The air pressure inside the hollow portion 33d of the door-stop portion 33 and the air pressure inside the hollow portion 34a of the mounting portion 34 are measured, and the pressure difference is detected as a detection value P (step S24), and the detection value P is used as a reference. The value P0 is stored (step S25).
That is, the CPU 65 of the unit 8 controls the air pressure in the hollow portion 33d of the door contact portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 during the movement of the vehicle door 3 from the door closed position to the door open position. The pressure difference between and is stored as the reference value P0.

Next, the CPU 47 of the controller 6
It is determined whether or not a "door close signal" is input (step S
6). Here, when the conductor performs an operation to close the vehicle door 3, the CPU 47 on the controller 6 side causes the "door close signal".
Will be entered, so in step S6 "Y
ES "and starts the timer (step S
7). At this time, the vehicle door 3 moves from the door opening position to the door closing position.

Next, when the "wake-up signal" transmitted from the unit 8 is received by the terminal 7 as reception data by electromagnetic induction coupling, the reception data is demodulated, and the demodulation data is given to the CPU 47 of the controller 6, The CPU 47 of the controller 6 executes step S
It is determined to be "YES" in 8, and the "measurement start signal" is transmitted by electromagnetic inductive coupling (step S9). At this time, the CPU 47 of the controller 6 controls ON / OFF of the base current supplied to the NPN transistor 57 to generate a signal pattern including data "1" and "0" different from the above-mentioned "teaching start signal". , And send it as a “measurement start signal”.

Next, the "measurement start signal" transmitted from the terminal 7 is received by the unit 8 as reception data by electromagnetic induction coupling, and the reception data is demodulated.
When the demodulated data is given to the CPU 65 of the unit 8,
The CPU 65 of the unit 8 determines “YES” in step S26, and at this time, the air pressure in the hollow portion 33d of the door stop portion 33 of the door tip rubber 32 and the mounting portion 34.
The air pressure inside the hollow portion 34a is measured, and the differential pressure thereof is calculated as the detection value P (step S27). That is, the CPU 65 of the unit 8 determines the differential pressure between the air pressure in the hollow portion 33d of the door-stop portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 when the vehicle door 3 is closed, as the detected value P. To detect as.

Next, the CPU 65 of the unit 8 reads the resistance value of the variable resistor 72, calculates the read resistance value as the judgment value P1 (step S28), and calculates the difference between the reference value P0 and the detection value P described above. And the determination value P1 are compared (step S29).

By the way, when the door is not in the trapped state, the vehicle door 3 is moving, that is, the reference value P0 which is a value before the vehicle door 3 is closed and the value when the vehicle door 3 is closed. The difference from the detection value P which is equal to or smaller than the determination value P1 is equal to or smaller than the determination value P1.
It is determined to be "NO" in 9, and the "detection off signal" is transmitted by electromagnetic induction coupling (step S30). At this time, the CPU 65 of the unit 8 controls on / off of the base current supplied to the NPN transistor 57 to generate a signal pattern including data “1” and “0” different from the above-mentioned “wakeup signal”. , Send it as a "detection off signal".

Then, the "detection off signal" transmitted from the unit 8 is received by the terminal 7 by electromagnetic induction coupling, the received data is demodulated, and the demodulated data is given to the CPU 47 of the controller 6. The CPU 47 determines “NO” in step S10, determines “YES” in step S11,
The output of the "door-to-door detection signal" is turned off, that is, the "door-to-door detection signal" is not output (step S1).
2).

On the other hand, when the door is sandwiched, the difference between the reference value P0 and the detected value P exceeds the judgment value P1. Therefore, the CPU 65 of the unit 8 determines "YES" in step S29. It is determined that the "detection on signal" is transmitted by electromagnetic inductive coupling (step S3
1). At this time, the CPU 65 of the unit 8 controls on / off of the base current supplied to the NPN type transistor 57 so that the data “1” and “0” different from the above-mentioned “wake-up signal” and “detection off signal” are output. Is generated, and it is transmitted as a "detection on signal".

Then, the "detection ON signal" transmitted from the unit 8 is received by the terminal 7 by electromagnetic induction coupling, the received data is demodulated, and the demodulated data is given to the CPU 47 of the controller 6, and the controller 6 of the controller 6 operates. CPU47 is "YES" in step S10.
Then, the output of the "door-nip detection signal" is turned on, that is, the "door-nip detection signal" is output to the output circuit 48 (step S13).

Next, the CPU 47 of the controller 6
It is determined whether or not the timer has timed out (step S14). If not, step S
It is determined to be “NO” in step S14, and the above-described step S1
Return to 0. On the other hand, when the time is up, it is determined to be "YES" in step S14, the power supply to the series resonance circuit 55 of the terminal 7 is stopped (step S15), and the process returns to step S1.

That is, the CPU 65 of the unit 8 repeatedly executes the above-described determination process and transmits the "detection on signal" or the "detection off signal" while the power as the power supply voltage is held ( Steps S27 to S3
1) The CPU 47 of the controller 6 monitors whether the "detection on signal" or the "detection off signal" is received until the timer times out (step S1).
0 to S13), when the timer times out, the monitoring is stopped and the supply of power to the series resonance circuit 55 of the terminal 7 is stopped (step S15).

Thus, according to this embodiment, electric power is supplied between the terminal 7 provided on the vehicle body 2 side and the unit 8 provided on the vehicle door 3 side by electromagnetic induction coupling, and Since it is configured to transmit and receive signals (detection on signal, detection off signal) indicating whether or not the door is in the door-nipped state, unlike the conventional one, the vehicle body 2 side and the vehicle door 3 side are connected. The cable can be dispensed with, and the cable is not broken. As a result, it is possible to accurately detect whether or not the vehicle is in the door-sandwiched state, so that the safety of passengers can be surely ensured and the reliability can be improved.

At this time, the case 13 of the terminal 7 is composed of a main case 14a made of iron and a cover 14b made of resin, and the terminal 7 is arranged so that the main case 14a and the inner wall surface 30a of the iron plate 30 of the vehicle body 2 face each other. Since the main case 14a and the inner wall surface 30a of the iron plate 30 have the same magnetic permeability, the inductance is not reduced and the DC resistance is not increased before and after the terminal 7 is attached. The resonance point will not shift. As a result, before installing terminal 7,
Since it suffices to adjust the inductance of the coil 17 so that the resonance point is located at the optimum position, there is no need to perform the adjustment work after mounting, and work efficiency does not decrease. Further, when an abnormality occurs due to some cause, the terminal 7 can be removed from the vehicle body 2 and the inspection can be performed, so that the inspection can be easily performed.

The same applies to the unit 8 as well. The case 19 of the unit 8 is composed of a main case 20b made of iron and a cover 20c made of resin, and the main case 20b and the upper surface 3a of the vehicle door 3 are provided. Since the unit 8 is mounted so that the and 8 are opposed to each other, since the main case 20b and the upper surface portion 3a of the vehicle door 3 have the same magnetic permeability, the inductance decreases before and after the unit 8 is mounted, The DC resistance does not increase and the resonance point does not shift. As a result, it is sufficient to adjust the inductance of the coil 26 so that the resonance point will be at the optimum position before mounting the unit 8. Therefore, it is not necessary to perform the adjusting work after mounting, and the work efficiency is reduced. There is no. Further, when an abnormality occurs due to some cause, the unit 8 can be removed from the vehicle door 3 and the inspection can be performed, so that the inspection can be easily performed.

Even if the vehicle door 3 is moving,
Power can be supplied, and a signal indicating whether or not the door is in the door-to-door state can be transmitted and received, that is, the door-to-door state is in the door regardless of whether or not the vehicle door 3 is moving. Since it can be detected whether or not it is possible to more reliably ensure the safety of passengers and passengers, it is possible to further enhance the reliability.

In the terminal 7, the CPU 47 of the controller 6 controls the ON / OFF of the base current supplied to the NPN transistor 57 to generate the "teaching start signal" and the "measurement start signal" with different signal patterns. Since it is configured to identify the detection start timing of the pressure sensor 23 using these signal patterns, there is no need to separately provide a configuration for generating a signal for identifying the detection start timing. It is possible to simplify the configuration.

Further, in the unit 8, the CPU 65
Controls the base current supplied to the NPN transistor 69 to turn it on and off, thereby generating the "detection on signal" and the "detection off signal" with different signal patterns, and using these signal patterns, the door is in a door-to-door state. Since it is configured to identify whether or not it is, it is not necessary to separately provide a configuration for generating a signal for identifying whether or not the door is in the door-nipped state, and the configuration can be simplified accordingly. .

The present invention is not limited to the above-mentioned embodiments, but can be modified or expanded as follows. The main case of the terminal may be made of a material having a magnetic permeability higher than that of the inner wall surface of the iron plate to which it is attached, and the main case of the unit may be made to be transparent to the upper surface of the vehicle door to which it is attached. It may be made of a material having a magnetic permeability higher than the magnetic permeability.

When detecting whether or not the door is in the trapped state, it is not limited to detecting the pressure change of the air pressure inside the door rubber, but may be the change of the pressing force acting on the door rubber. For example, a tape switch having mechanical contacts, a piezoelectric rubber, a photoelectric type using a light emitting element and a light receiving element, an ultrasonic type using an ultrasonic sensor, etc. good.

The terminal and the unit are not limited to the bidirectional communication between them, but at least the unidirectional communication for transmitting the "detection ON signal" from the unit to the terminal is shown. Is also good.
The configuration is not limited to the case where the power supply is stopped when the vehicle door is at the door closing position, and the configuration may be such that the power is always supplied.

The positional relationship between the terminal and the unit is
Electromagnetic induction is provided only in a limited range of the movement range of the vehicle door by configuring the vehicle door to face each other when the vehicle door is in the door closing position and not to face each other when the vehicle door is in the door opening position. The movement of the vehicle door is not limited to the configuration that establishes the coupling, and the vehicle door is opposed when the door is in the door closing position and also when the vehicle door is in the door opening position. The structure may be such that the electromagnetic inductive coupling is established over the entire range.

The configuration is not limited to the case where the controller and the terminal are separately provided, and the configuration may be such that they are integrally provided, and the configuration is not limited to the case where the controller and the terminal are provided one-to-one. May be provided in a plurality of), that is, a centralized control may be performed.

[0082]

As is apparent from the above description, according to the door pinch detection device of the present invention, the first coil provided on the vehicle body side and the second coil provided on the vehicle door side are provided. By the electromagnetic induction coupling, the electric power is supplied from the vehicle body side to the vehicle door side, and the detection signal is transmitted from the vehicle door side to the vehicle body side. It is possible to eliminate the need for a cable that connects the vehicle door side to the vehicle door side, and the cable is not disconnected. As a result, it is possible to accurately detect whether the vehicle is in the door-trapped state, so that the safety of passengers can be reliably ensured, and the reliability can be improved.

At this time, at least the first mounting portion side of the first case is made of a material having a magnetic permeability higher than the magnetic permeability of the material of the first mounting portion, and at least the second mounting portion of the second case is used. Since the side of the mounting location of is made of a material having a magnetic permeability higher than that of the material of the second mounting location, when mounting the first case and the second case, the inductance before and after mounting is There is no decrease or increase in DC resistance, and the resonance point does not shift. As a result, before the first case and the second case are mounted, it is sufficient to perform the adjustment work of the inductance of the coil so that the resonance point becomes the optimum position, and therefore it is not necessary to perform the adjustment work after the mounting. Work efficiency does not decrease. Further, when an abnormality occurs due to some cause, the first case and the second case can be removed and the inspection can be performed, so that the inspection can be easily performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a front view showing a main part of a vehicle.

FIG. 3 is a plan view (a) and a front view (b) of the terminal.

[Figure 4] Exploded view of the terminal

FIG. 5 is a plan view (a), front view (b) and side view (c) of the unit.

FIG. 6 is an exploded view of the unit

FIG. 7 is a plan view (a), a front view (b) and a side view (c) showing a mounting state of a terminal and a unit.

FIG. 8 is a diagram showing a positional relationship between terminals and units.

FIG. 9 is a front view showing a main part of a vehicle door.

FIG. 10 is a sectional view of a rubber tip of a door.

FIG. 11 is a flowchart showing the processing contents of the CPU on the controller side.

FIG. 12 is a flowchart showing the processing contents of the CPU on the unit side.

[Explanation of symbols]

In the drawings, 1 is a vehicle, 2 is a vehicle body, 3 is a vehicle door, 3a is an upper surface portion (second mounting location), 4 is an entrance / exit, 5 is a door pinch detection device, and 13 is a case (first case). , 17 is a coil (first coil), 19 is a case (second case), 2
6 is a coil (second coil), 30a is an inner wall surface (first mounting location), 45 is a power supply device (power supply means), 60 is first signal pattern generation means, and 62 is a parallel resonance circuit ( constant).
Voltage circuit ), 71 is second signal pattern generation means, 73
Is a detection means.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tsuneishi Tomita 3-5-3 Akebonocho, Tachikawa-shi, Tokyo Sunkus Co., Ltd. (72) Toshinori Imai 3-5-3 Akebonocho, Tachikawa-shi, Tokyo Sun Cos Co., Ltd. (72) Inventor Hideyuki Kobayashi 3-5-3 Akebono-cho, Tachikawa-shi, Tokyo Sunkus Co., Ltd. (72) Atsuro Toda 3-5-3 Akebono-cho, Tachikawa-shi, Tokyo Sanx Co., Ltd. (56) References JP-A-3-99972 (JP, A) Actual development Sho 61-52075 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B61D 19/02

Claims (3)

(57) [Claims] 1. A power supply means provided on the vehicle body side, a first case attached to a first attachment location near the vehicle entrance / exit, and a power supply unit housed in the first case, Exchange from supply means
A first coil to which galvanic power is supplied; a second case attached to a second attachment point on the vehicle door side that opens and closes an entrance / exit of the vehicle body; and a second case accommodated in the second case, A second coil that is electromagnetically inductively coupled to the first coil; and a first coil and a second coil that are provided on the vehicle door side.
In response to the coil is the electromagnetic induction coupling, the second
A constant voltage is generated from the AC power generated by the coil
And a constant voltage circuit that is provided on the vehicle door side, and performs detection based on the constant voltage generated by the constant voltage circuit .
Based on comparing the detected value with a predetermined decision value
And a detection unit that determines whether or not the door is in a door-strapped state and transmits a detection signal indicating the determination result to the vehicle body side by electromagnetic induction coupling between the first coil and the second coil. At least the side of the first mounting portion of the first case is formed of a material having a magnetic permeability equal to or higher than the magnetic permeability of the material of the first mounting portion, and
At least the side of the second mounting portion of the case is formed of a material having a magnetic permeability equal to or higher than the magnetic permeability of the material of the second mounting portion. 2. The level of electromagnetic inductive coupling between the first coil and the second coil is provided by controlling the level of AC power supplied to the vehicle body and supplied to the first coil. A first signal pattern generating unit that controls and generates a signal pattern based on a level change of the electromagnetic inductive coupling; and the detecting unit determines the signal pattern generated by the first signal pattern generating unit. it allows door pinch detecting apparatus according to claim 1, characterized in that it is configured to initiate discovery. 3. The second door is provided on the vehicle door side.
Controlling the level of the alternating current power supplied to the coil to control the level of electromagnetic inductive coupling between the first coil and the second coil, and the signal pattern based on the level change of the electromagnetic inductive coupling. And a second signal pattern generating means for generating the detection signal, wherein the detecting means is configured to generate the detection signal by the signal pattern generated by the second signal pattern generating means. The door pinch detection device according to claim 1.