JPS6291882A - Crew detecting device - Google Patents

Abstract

PURPOSE:To detect whether a crew member is on board or not, by the variation of an electrostatic capacity of a capacitor for a crew detection use consisting of a pair of electrodes and a space for containing the crew. CONSTITUTION:The device is constituted of a microcomputer (MPU) 7 being the main constituent, an input switch circuit 8, a driving circuit 9, a power source circuit 10, a current detecting circuit 11 and a crew detecting circuit 12, etc. In this state, the MPU 7 switches a level of output ports P0, P1 and reads a switch operation of the input switch circuit from input ports R0-R7. Also, when the ports P0, P1 are set to '0', only an output of an inverter becomes '1', therefore, an FR window UP operation, namely, on/off of an UP contact can be read. On the other hand, when an output O0 becomes '0' and a relay RY 1 is energized, a contact ry1 is closed and connected to a +B power source, a current in the DOWN direction flows to an FR window ascending/descending use motor MFR and the the motor MFR is energized in reverse. Subsequently, when an output port O1 becomes '0' and a relay RY 2 is energized, a contact ry2 is closed and connected to the +B power source, a current in the UP direction flows to the motor MFR and the motor MFR is energized forward.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a device for detecting whether or not a passenger is boarding a moving object such as a vehicle.

(Prior Art) For example, in some types of vehicles, side windows (driver's door window, passenger's door window, driver's rear door window, and passenger's rear door window), sunroofs (roof panels) The vehicle is equipped with an occupant detection device that detects whether or not a passenger is on board, for the purpose of preventing forgetting to close the vehicle, controlling air conditioner (hereinafter the same) blowout, controlling car audio, etc. In this case, the side window and /
Or, it controls the closing of the sunroof, or detects whether each seat is occupied or not, and controls the direction of the air conditioner outlet to the seat that is occupied, or controls the output balance of the car audio to suit that seat. .

An occupant detection device that has conventionally been commonly used in this type of vehicle is known as a single seat switch. This seating switch is a switch embedded in the seat (chair) of each seat, and its contacts close when the occupant is seated.

FIG. 8a is a cross-sectional view of the passenger seat of the vehicle, and with reference to this figure, the seat has a seat cushion cover 110.
．． Seat cushion pad 120° pad support 13
0. A seat switch 100, which is composed of a seat cushion spring 140, a seat frame 150, etc., is embedded in a seat cushion pad 120.

Details around the seat switch 100 are shown in FIG. 8b.

Referring to FIG. 8b, the seat switch 100 has a movable contact 101 and a fixed contact 102 as main components, and the fixed contact 102 is fixed to a pad support 130. Seat cushion pad 120 and pad support 13
0 are both flexible elastic bodies and bend together when the occupant is seated, but the seat cushion pad 120 is made of a more flexible material (for example, urethane foam), so it is indicated by a broken line in FIG. 8b. As shown, the seat cushion pad 1.20 flexes relative to the pad support 130. As a result, the movable contact 101 rotates around the movable axis and closes the switch contact with the fixed contact 102 (switch on). The seating switch 100 (movable contact 101 and fixed contact 102) is connected to nine electric circuits (not shown), and detects whether the occupant is seated by turning the switch on or off.

(Problems to be Solved by the Invention) By the way, the seat switch 100 is mechanically opened and closed by the deflection of the seat cushion pad 110 when the occupant is seated, so it is vulnerable to impact, and is especially vulnerable to impacts when the occupant gets into the vehicle. Occasionally, **forces are applied, making it easy for failures to occur. Further, since it is a contact switch, the life of the contact part is short, and the switch is turned on even when a load other than one person is on board, so detection is unreliable.

In view of the above-mentioned drawbacks of conventional occupant detection devices, an object of the present invention is to provide a simple and highly reliable occupant detection device that can reliably detect whether or not an occupant is on board.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides at least one occupant detection capacitor on a moving body, comprising a pair of electrodes and a space for accommodating an occupant. ;and,
An occupant detection device is constituted by a detection means for detecting a change in capacitance of the capacitor for occupant detection.

The concept of the present invention will be explained with reference to FIG. 1a.

Figure 1a shows the driver's seat of a vehicle, and the detection electrode DMS FRt roof ROOF is installed along the door trim of the driver's seat door DORFR R.
(that is, body ground) and one occupant detection capacitor (this is CIF,
), and a detection electrode FMS FFt, /L/-'7R laid out along the floor floor at the foot of the driver's seat.
Another occupant detection capacitor (this will be referred to as C2) is formed by OOF (-) (body ground) and the space of the driver's seat. In this case, since the human body has a high dielectric constant (approximately 80), the capacitor CIF□ and 0
The capacitance of 2FR is significantly different. Therefore, by detecting changes in the capacitance of these capacitors CIFR and C2F, it is possible to detect whether or not an occupant is on board. Note that the electrodes constituting the capacitor for detecting one occupant may be installed on an armrest provided in the door trim.

By the way, Fig. 1a shows an example of a detection circuit that detects changes in the capacitance of capacitors CI F and C2F (here, the resistors are shown as rectangles; hereafter, they are shown). I will briefly explain about. In Figure 1b,
The equivalent circuit of the capacitors CIF, , C2F and the detection circuit shown in Fig. 1a is shown, in which ○SC
is an oscillator that outputs a positive/negative symmetric AC voltage such as a sine wave, square wave, or square wave, Cs is a reference capacitor, Co is a storage capacitor, and CpFt is a capacitor CIF□ and C
2FR composite capacitor, LPF is a low pass filter consisting of resistor R and capacitor C.

D H+ C2+ C3 and C4 are diodes.

Each capacitor CFg, Co and Cs is connected to the oscillator ○SC
Charging and discharging are repeated for each positive and negative cycle of a symmetrical alternating current voltage (hereinafter simply referred to as alternating current voltage) such as a sine wave, triangular wave, or rectangular wave output by the AC voltage.

Now, looking at the it capacitor Co, the currents through the capacitor co are 11 and 12 in FIG. 1b. The current i1 is a current that passes through the diode D2 and charges the capacitor CFR during the negative half cycle of the AC voltage output from the oscillator O8C, and the current 12 is the current that charges the capacitor CFR through the diode D4 during the positive half cycle of the AC voltage output from the oscillator O8C. This is the current that passes through and charges the capacitor Cs.

In this case, if CF R = Cs, +1 = i2, and since the direction is opposite, the charging and discharging voltage of Co is canceled out and no voltage appears between the terminals, but if CPR≠Cs, i1≠
12, Co is charged in one direction and a voltage appears between the terminals.

However, since the storage capacitor Co is short-circuited by the diodes D1 and D2 or by the diodes D4 and D3, the voltage across the terminals of Go will theoretically not appear.

However, Fig. 1c shows the diode's forward voltage VD and forward current ■. This is a graph that shows the relationship between forward critical voltage V. win
Below, current Io does not flow.

The value of this critical voltage v□sin can be increased by connecting diodes in series. In other words, the voltage between the terminals of the storage capacitor Go is this forward critical voltage V
□If the setting is made to be less than or equal to win, the voltage generated between the terminals of the capacitor co due to CFR≠Cs will be reduced to the DC output voltage V through the low-pass filter LPF.
out, you can close it and take it out. This DC output voltage Vout is.

If C1l<CFR, it is positive, and if C8>CFR, it is negative, so the output voltage Vout is smaller than the capacitor C.
It becomes possible to detect changes in PR.

Now, first, the detection electrode will be explained.

In the case of a vehicle, the following detection electrodes can be considered.

Pa1. ``Floor mat with built-in electrodes'' Refer to Figure 6a for the floor mat.
p.c.

M A T p L I M A T PtR and M
AT and L are mats made of rubber molding or foam urethane molding that are installed on the floor of each seat of a vehicle, on which passengers rest their feet when sitting in each seat (that is, the above-mentioned detection electrode plate (corresponding to FMS p p)) A. It is constructed by rubber molding or the like using a flexible metal plate such as aluminum foil as the core material.

B. As shown in Figure 9a, mat material G made by rubber molding etc.
A flexible metal plate MTLb such as aluminum foil is adhered to MATs, and a mat material GMAT2 made of rubber molding or the like is further adhered thereon.

C1 As shown in Figure 9b, mat material G made by rubber molding etc.
Apply metal paint (conductive paint) to MAT3.

Metal MMTLC is formed by spraying or sputtering, and then mat material GM is formed by rubber molding etc.
Construct by gluing AT4.

...etc.

``2. Door trim with electrodes'' Door trim is the inner lining of the vehicle door, and is made by bonding a skin to a trim substrate. 1. Molded with foamed urethane.
Alternatively, there is one made by molding ABS resin or polypropylene resin (that is, it corresponds to the above-mentioned detection electrode plate FMSFR).

Let me explain an example of this configuration.

D. As shown in Fig. 9c, a metal plate MTLd such as aluminum foil is adhered to a trim substrate TRMb made of hardboard, paper board, etc., and a skin TRMc made of a vinyl chloride sheet etc. is further adhered on top of it. do. Alternatively, a metal layer is formed by coating, spraying, or sputtering a metal paint (conductive paint) on the trim substrate T, RMb, or skin TRMc, and these are adhered to each other.

E. As shown in Figure 9d, a metal plate such as aluminum foil is adhered to the back side of the molded door trim TRMd made of ABS resin or polypropylene resin, or a metal paint (conductive paint) is applied, sprayed or A metal layer MTLe is formed by sputtering.

F. Form a metal layer by applying a flexible metal plate such as aluminum foil to the inside of the formed skin by vacuum forming, or by applying, spraying, or sputtering a metal paint (conductive paint). It is constructed by foaming and injecting urethane foam (details are similar to G described below).

...etc.

``3. Armrest with electrodes'' The armrest is attached to the door trim of the vehicle and is made of urethane foam or ABS resin.

Polypropylene resin molding, etc.

To explain this configuration, G, J! In the case of foam urethane molding, generally a skin is formed inside the urethane foam injection foam mold using vinyl chloride paste or vacuum molding, and an insert (core material:
Set IN5) in Figure 9e and inject and foam the urethane foam. Therefore, after setting a flexible metal plate such as aluminum foil on the inside of the formed skin, urethane foam is injected and foamed.

That is, as shown in FIG. 9C, the armrest base material ARMb made of urethane foam is covered with the metal plate MTLg,
Furthermore, it is covered with an epidermis ARMc from above.

In this case, a metal layer is formed by coating, spraying, or sputtering a metal paint (conductive paint) on the inside of the skin formed in the urethane foam mold.

It may also be constructed by foaming and injecting urethane foam.

H. Paint (apply) metal paint to insert INS made of polypropylene resin, ABS resin molding, etc.

The insert INS is constructed by forming a metal layer by blowing or sputtering) or by plating, or by using a metal plate as the core material of the insert INS.

■Urethane foam injection When foaming is performed by directly injecting urethane foam without forming a skin on the inside of the foam mold,
A metallic paint (conductive paint) that also serves as a cosmetic appearance is applied to form a metal layer to form the armrest with built-in electrodes.

...etc.

In this way, the detection electrode can be configured without requiring changes to the interior and exterior of the vehicle.

In a preferred embodiment of the present invention, as a detection electrode for detecting a vehicle occupant, a flexible metal plate such as aluminum foil is set on the inside of a skin formed of a foamed urethane foam, It uses an armrest with built-in electrodes made by injecting and foaming urethane foam.

Next, the shape of the metal plate to be incorporated into the armrest of a vehicle will be described with reference to FIGS. 10a to 10111.

In addition, Fig. 10a, Fig. 10c, Fig. 10e, Fig. 10g
Figures 10i and 10 are side views of the armrest of the vehicle [the right (direction of the apex) is the front (vehicle accompanying direction)]
FIG. 10b, FIG. 10d, FIG. 10f, FIG. 10h, FIG. 1Oj and FIG. 10Q each show a right side view thereof.

In these drawings, the built-in metal plate is shown by sawing.

Referring to FIGS. 10a and 10b, about two-thirds of the rear circumferential surface of the armrest is covered with a uniform metal plate (shape 1).

Referring to FIGS. 10c and 10d, the peripheral surface of the armrest except for about 2/3 of the upper surface is covered with a uniform metal plate (shape 2).

Referring to FIGS. 10e and 10f, the peripheral surface of the rear armrest except for about 2/3 of the upper surface is covered with a metal plate having a rectangular window (cutout) (shape 3).

Referring to FIGS. 10g and 10h, the circumferential surface of the armrest except for the upper surface is covered with a uniform metal plate (shape 4).

Referring to Figures 1 and 10, the circumferential surface excluding the upper surface of the armrest is parallel to the upper surface of the armrest.
It is covered with a metal plate having book slits (shape 5).

Referring to the gIOJ diagram and the tenth diagram, the peripheral surface of the armrest is covered with a metal plate having two slits parallel to the upper surface of the armrest (shape 6).

Armrest with built-in metal plate in 6 ways (shape 1~
6) When each is used as a detection electrode and connected to the occupant detection circuit shown in FIG. 1a, the respective output voltage Vout
are shown in Table 1 below, however.

In this case, 1 oscillator OSC has a peak-to-peak value of 20V
A is a normal seated state, b is a driving state, and C is a sleeping state with the seat reclined.

d is when the seat is fully moved forward, e is when the seat is fully retreated, f is when the arm is inserted through the window 5cm+ from the armrest. 2g is when the seat is 10cm from the armrest.
cm is the state where the arm is inserted through the window, h is the state where the arm is inserted through the window 15cm from the armrest,
i is a state in which only the seat is reclined forward without an occupant, and the unit of the output voltage is [vl].

Table 2 So 1 In a preferred embodiment of the invention, shape 4,
That is, an armrest whose peripheral surface except the top surface is covered with a uniform metal plate is used as a detection electrode.

(Function) According to the present invention, since the presence or absence of an occupant is detected by the change in the capacitance of the capacitor for detecting an occupant, which consists of a pair of electrodes and a space for accommodating an occupant, the contact point Since there is no need to detect changes in capacitance, durability and reliability are increased, and only changes in capacitance need to be detected, making the configuration extremely simple.

The capacitor for occupant detection is located in the door trim.

By incorporating a metal plate into a floor mat, armrest, etc., or by forming a layer of conductive paint, the structure can be easily constructed without changing the internal appearance.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Embodiment) FIG. 2a shows the configuration of a power window control system for a vehicle as an embodiment of the present invention. Before explaining the embodiment with reference to FIG. 2a, we will first explain the terms used in the following explanation. Explain. See Figure 6a.

The interior of a two-FR vehicle is divided into four parts along the front and rear lines, and the front right side is divided into four parts.The FR seat indicates the driver's seat, and the FR window indicates the front right window. Therefore, the subscript "'FR" is used in this sense, and if it is a door on the front right side, it is DORFR + if it is an armrest provided on the door trim on the front right side, it is A RM F.
R1, etc.

It refers to the front left side of a two-FL vehicle, which is divided into four parts: front, rear, left, and right; the FL seat refers to the front passenger seat, and the FL window refers to the front left window. Therefore, in this sense, the subscript sr FLn is used, and if it is the door on the front left side, it is D ORF L + 1'f [If it is an armless j equipped on the left side door trim, it is ARM.
FL, etc.

RR: The rear right side of the vehicle is divided into four parts: front, rear, left, and right. RR seat refers to the rear right seat, and RR window refers to the rear right window. Therefore, in this sense, the subscript "RR" is used, and if it is a door on the rear right side, it is DORRR + if it is armless 1-, which is provided on the door trim on the rear right side, it is A RM RR.
! etc.

RL: The interior of the vehicle is divided into four parts in the front, rear, left, and right, and it means the rear left side. RL seat refers to the rear left seat, and RL window refers to the rear left window. Therefore, in this sense, the subscript Lr RLTJ is used, and if it is a door on the rear left side, it is DORRL + if it is a door on the rear left side 1 - an armless provided on the rim 1 - it is A R
M RL 2 etc.

Other terms will be explained one by one.

Referring to FIG. 2a, this control system mainly includes a microcomputer (MPU) 7, an input switch circuit 8. Drive circuit 9. The power supply circuit 10 is comprised of a current detection circuit 11, an occupant detection circuit 12, and the like.

MPU7 person capo-1-RO~R7 and output boat p
. , Pl are connected to a five-person switch circuit 8. Details of the input switch circuit 8 are shown in FIG. 2b. This will be explained with reference to FIG. 2b.

This input switch circuit 8 includes an FR armrest ARM.
FR window up/down switch & O1 provided in FR
-Up/auto down switch, Fr-Window up/down switch
Down switch and auto-up/auto-down switch, up/down switch and auto-up/auto-down switch for RR windows.

and a group switch consisting of RL arbitrary up/down switch and auto up/auto down switch, F
Position detection limit switch M provided on R door frame
S, , Door courtesy switch QCFR for detecting opening/closing of FR door D ORF R provided on the right center body pillar (not shown); Switch DLFPL for detecting door lock/unlock of FR door D ORF R; FL armrest A RM P L FLg up/down switch provided on the FLg up/down switch, position detection limit switch M S F L provided on the FL door frame (see Fig. 4c), FL door D ORF L open/close detection provided on the left center body pillar (5LP shown in Fig. 8a) Door courtesy switch for OC, L, FL door p ORp L door lock/unlock detection switch D L p L ; RR
RR window up/down switch provided on the armrest ARMFt, position detection limit switch MS provided on the RR door frame, RR door DOR provided on the right quarter lock pillar (not shown), door courtesy switch ocF for opening/closing detection, , RR door D○R8□ door lock/unlock detection switch DL, FL;R
L armrest A RM RL equipped with RLg up・
Down switch, position detection limit switch MS provided on the RL door frame.

1. Left Quarter Lock Pillar (QLP shown in Figure 6a)
) Door courtesy switch OCRL for detecting opening/closing of RL door D ORRL, RL door D.

Door lock/unlock detection switch D L on R8
RL + and ignition key socket (
An IC key switch (not shown) for detecting the presence or absence of an ignition key is connected. In addition, in FIG. 2b, a limit switch MSij and a door courtesy switch ○Cij are respectively shown.

and a door lock/unlock switch DLij, where the subscript i is 9 or 9.

The subscript j indicates shaku or L.

IC2 of the input switch circuit shown in FIG. 2b is a decoder connected to the output ports Po and Pl of the microcomputer (MPU) 7, and one of the output terminals A to D is selected according to the signals of Po and Pl. selectively set to 0
(L level), and the others are set to 1 (H level).

This input/output relationship is shown in Table 2 below.

The outputs of the output terminals A-D in Table 2 are from the inverters INvA to INV.
It is inverted at o. When the output terminals of these inverters are at H level (0) and the fixed contact of the switch connected to it is connected to the movable contact and becomes I level (1), the level at that connection point becomes H level (1). When the fixed contact of the switch becomes L level (0), the level of the connection point becomes T level (0). Also, when the output terminal of these inverters is at L level (0), the fixed contact of the switch connected to it is connected to the movable contact and even if it becomes H level (1), the diode is conductive, so the connection is The level of the point remains at L level (0). That is, the MPU 7 switches the levels of the output ports Po and Pl and reads 29 types of switch operations of the input switch circuit from the seven input ports RO-R7.

For example, the same input port R8 has the UP contact of the FR window up/down switch of the input switch circuit 8 (same for fixed side 2 and below), and the UP contact of the RR window up/down switch.
iJ point, IC key switch contact.

and the contacts of RL door courtesy switch ○C8L are connected, but if both output ports Po and 21 are set to O, only the output of inverter I N V A will be at H level (1
), it is possible to read FR window up operation 2, that is, UP contact on/off.

Referring again to Figure 2a.

A relay driver of a drive circuit 9 is connected to an output port 1-00-o8 of the microcomputer (MPU) 7. The relay driver is composed of an inverter, a switching transistor, etc., and the output port is at L level (
When it becomes 0), it is reversed by an inverter and the switching transistor becomes conductive.

The relays RY, ~RY, connected thereto are energized.

Output port O6 becomes L level (0), relay RYI
When energized, the relay contact ryl is closed and connected to the 10B power supply, and a current flows in the direction of the arrow DOWN to the motor MFR for raising and lowering the FR window, energizing the motor MFR in the reverse direction. Output port 01 becomes L level (0), relay R
When Y2 is energized.

Its relay contact ry2 is closed and connected to the 10B power supply, and F
A current flows in the direction of the arrow UP to the motor MF for raising and lowering the R window, energizing the motor MF to rotate in the normal direction.

Similarly, relay RY3 or RY4 is selectively energized to energize motors M and L for raising/lowering the FL window in the forward and reverse directions; relay R
Select and energize Y5 or RY6 to energize the motor MRR for raising and lowering the RR window in the forward and reverse directions; relay RY7 or RY
8 is selected and energized to energize R1-window lifting motor MRL in the forward and reverse directions.

Here, the window elevating mechanism of the apparatus of this embodiment will be explained with reference to FIGS. 4a, 4b, and 4c.

FIG. 4a shows the FL door (D ORF L ) 1,
The electric mechanism that drives the window glass (1"L window) 2 up and down is shown. Referring to this figure, link arms 31p are attached to each of the upper and lower guide rails fixed to the window glass 2.
A pin at one end of the link arm 32 is connected to the lift arm 4, which engages the other end of the link arm 32. A sector gear 4 connected to the lift arm 4 moves up and down. The sector gear 4 meshes with a wheel of a worm wheel assembly 5, and the rotating shaft of the motor M p L is coupled to the worm meshing with the wheel. The combination of sector gear 4 and worm wheel assembly 5 is shown in Figure 4b.

When the motor MpL rotates in the forward direction, this rotation rotates the sector gear 4 clockwise in FIG. 4a via the worm wheel assembly 5, pushing the glass 2 upwards (closing the window). When the motor MFL rotates in the opposite direction, this rotation causes the sector gear 4, via the worm wheel assembly 5, to rotate counterclockwise in FIG. 1a, lowering the glass 2 (opening the window).

FIG. 4c shows a sectional view taken along the line IVC-IVC of FIG. 4a. As shown in this figure, a limit switch M S t=L for position detection is provided in the hollow part of the upper part of the door frame. The movable contact piece of the switch M S pi L protrudes from the door frame toward the weather strip 6 side, and when the window glass 2 reaches the upper limit red position, the movable contact piece is pushed by the bending of the weather strip 6 and the switch M S
pL turns on. Therefore, when the window glass 2 is below the upper limit red position, the switch MSFL is off.

Although only the window lift III mechanism of the FL door (D ORF L ) is illustrated here, the other doors (FR, RR, RL doors) have exactly the same configuration.

Referring again to Figure 2a. A current detection circuit is connected to the power line of each window lifting motor.

As is well known, the motor current is proportional to the motor load, so in this case each lifting motor (MFR).

The motor currents (MFL, MRR, MRL) are detected as the voltage between the terminals of the low resistance resistor r. In other words,
Since each motor is overloaded at the lower limit position of the window glass to be driven, this is used to detect when the window is fully open.

The occupant detection circuit 12 detects the FR seat by changing the capacitance of the capacitor for occupant calibration as described above.

This circuit detects the presence or absence of occupants in the FL, FR, and RL seats. The details are shown in FIG. 2c.

Referring to FIG. 2c, 12FR is an occupant detection circuit that detects the presence or absence of an occupant in the FR seat, and this circuit is as described above. The conversion circuit BIN is connected. The detection terminal is FR armrest A
The RM FR is connected to a detection electrode AMS, which is incorporated in the FR. Referring to FIG. 3a, since the armrest ARMFR is adjacent to the space in which the occupant MAN is accommodated, the detection electrode AMS PR incorporated in the armrest ARMFR and the floor (body 7)
Toni J: A capacitor for jJ passenger detection is configured. The DC voltage (
After DC amplifying the aforementioned VouL) in the DC amplifier circuit AMP, the binary signal (VouL) is converted into a binary signal (
It is converted to 204 with occupant and 204 without occupant: 1) and is applied to input port R8 of MPU7.

The other occupant detection circuits L2FL, 12RR and 12RL have exactly the same configuration, and their respective detection terminals are connected to the detection electrodes AM S F L I A M S Rp and A M S Q L, and , R.R.
A 211i signal indicating the presence or absence of an occupant in the seat and RL seat is applied to input ports R9, RIO, and R11 of the MPU 7, respectively.

The structure of the armrest has been described above, but in this example, aluminum foil is placed on the inside of the polyvinyl chloride skin made of urethane foam, except for the area corresponding to the top surface. Urethane foam is injected and foamed from above (armrest of shape 4).

RR Armrest A RM A partially cutaway perspective view of RR is shown in Figure 3b, and its ur c - m c sectional view is shown in Figure 3.
Each is shown in Figure C. Referring to these figures, armrest ARMRR is made of urethane armrest base material A.
RM b and vinyl chloride armrest cover A R
In this embodiment, an aluminum foil detection electrode AMS portion R is inserted between A and M c on the circumferential surfaces of A and RM b except for their upper surfaces. Other armrest ARMtxR+ ARM
A RM pt also applies to FL and A RM RL.
tq has the same configuration (however, since ARMF8 has the group switch, the shape is different).

Also: R1 vibration Faosc is peak p') value 20v
(D oscillates a sine wave AC voltage. In other words, L in this case
The PF output voltage Vouj is the same as in column 4 of the first table. Therefore, the amplification factor of the DC amplifier AMP is set to 65, 5.2V in the case of the first table, and 2.6V in the case of i), and the threshold level of the binarization circuit BIN is set to 5V.

The MPU7 has an FR window and an FL window as shown below.

Controls the RR and RL windows. In other words, when each window up switch is operated, the corresponding window is closed for the time that the switch is on, and when each window down switch is operated, the corresponding window is closed for the time that the switch is on. A corresponding window! When each window auto-down switch is operated, the corresponding window is controlled to be fully opened, and when each window auto-down switch is operated, the corresponding window is controlled to be fully opened. And when it detects that the vehicle is not in use, it controls the windows to be fully opened. Among these controls performed by the MPU 7, the following describes the so-called "IJ" control to fully close an open window when no occupant is on board or the vehicle is not in use, which is related to the present invention. This will be explained with reference to the flowchart in FIG.

Note that in the following description, If S -, , indicates a step number (S is omitted in the flowchart).

When connected to the vehicle battery and powered on.

Initialize registers, flags, memory, etc. with Sl.

In S2, each switch operation is read as described above.

If the IG key switch is on in S3, it is determined that the vehicle is in use, and if each door lock/unlock switch (DLij) is on and turned on in S4, the vehicle is determined to be in use.
is determined to be near the vehicle.

At S5, each door courtesy switch (○C1j) is off, indicating that the door is open, so it is determined that the vehicle is in use. If there is a crew member, proceed to S7.
Controls opening and closing of windows according to other switch operations. In this case, when the FR window is fully open, the "rFR fully closed" flag is set, when the FL window is fully open, the "rFL fully closed" flag is set, and when the RR window is fully open, the "rRR fully closed" flag is set.
r, When the window is fully open, the rRL fully closed flag is set.

If the IG key is removed, all doors are locked, all doors are closed, and all seats are empty, the process proceeds from S6 to 89. In S9, the presence or absence of the "rFR fully closed" flag is checked. If this "rFR fully closed" flag is present, FRl is already in the fully closed state, so skip the following steps and proceed to step 313. However, if this "rFR fully closed" flag is not present, the FR window is not yet fully open. , sio adjusts the state of the switch M S F R. First time SI
Of course, when passing through O, the switch M S P R is off (FR window is not fully open), and the output port Oo is opened at S11.
is set to 1 (H) and output port 01 is set to 0 (L), the motor M pi R is urged to rotate normally, and the FR window is closed and driven.

After this, 511-3L3-...-517-...-3
21-...-52-83-34-55-S6-39-
3 IO-511-S 13-...

In this loop, when the FR window is fully open, the switch MSF
Since the signal is turned on, the process proceeds from SIO to S12, where both output ports O8 and 01 are set to 1;1 (H), the motor MFR is deenergized, and the "rFR fully closed" flag is set.

In S13, the presence or absence of the "rFL fully closed" flag is checked. If this rFL fully closed" flag is present, the FL window is already fully open, so skip the following steps and proceed to S17. However, if this rFL fully closed" flag is not present, the FL window is not fully open yet. , in S14, the switch M
Check the status of S pi L. When passing through S14 for the first time, switch MSFL is of course off (F[- window is not fully open), and output port 02 is set to 1 (+-1) at S1.5.
), the output port 03 is set to 0 (L), the motor MFL is urged to rotate in the normal direction, and the F L window is closed and driven.

After this, 5I5-317-...-321-1,...-3
2-83-84-35-36-39-...-813-
814-315-817-...

In this loop, when the FL window is fully open, the switch MSF
Since L is turned on, the process proceeds from S14 to 316, where both output ports 02 and 03 are set to 1 (H), the motor M P L is deenergized, and the "rFL fully closed" flag is set.

In S17, the presence or absence of the "rRR fully closed" flag is checked. If this rRR fully closed J flag is present, the RR window is already fully open, so skip the following steps and proceed to step 321. However, if this rRR fully closed flag is not present, the RR window is not fully open yet. , in S18, the switch M
Check the status of S g R. When passing through 318 for the first time, switches MS and are of course off (the RR window is not fully closed), and at 519, set output port 04 to 1 (H) and output port 05 to 0 (L), and then turn on the motor. M B
Force R to rotate normally, close the RR window and drive.

After this, 519-821-...-32-33-54-
55-86-59-...-313-...-517-
318-319-821-...

In this loop, when the RR window is fully open, the switch M S
Since RR is turned on, the process proceeds from 81g to 320, where both output ports 04 and 05 are set to 1 (H) and motor MpR is deenergized.

Set the "rRR fully closed" flag.

S2], the presence or absence of the "rRL fully closed" flag is checked. If this "rRL fully closed" flag exists, the R[- window is already fully open, so skip the following steps and return to step 82. However, if there is no "rRL fully closed" flag, the RL window is still fully open. Since there is no switch MS in S22,
Check the status of RL. When passing through S22 for the first time, the switch MSRL is naturally off (the RL window is not fully open).
, set the output port 06 to 1 (H') and the output port 07 to 0 (L) in S23, and turn on the motor MRL.
is energized to rotate normally, and the RL window is closed and driven.

After Kono, 523-82-83-. 54-55-86-8
9-...-313-...-817-...-S21
-322-323-32-...

In this loop, when the RL window is fully closed, the switch MSR
, is turned on, the process advances from S22 to 824, where both output ports 06 and 07 are set to 1 (H), motor MRL is deenergized, and the "rRL fully closed" flag is set.

In the manner described above, the MPU 7 controls the opening and closing of the six windows of the vehicle.

Next, another embodiment of the present invention will be described. In the above embodiment, an armrest with a built-in detection electrode was used, but here, only the differences will be explained when using a floor pine 1 with a built-in detection electrode and a door trim with a built-in detection electrode.

Referring to Figure 6a, floor mat MAT.

RI MAT PL I MAT g□ and M A
TRL is a mat laid on the floor of each FR seat, FL seat, RR seat, and RL seat. As mentioned above, these floor mats are constructed by gluing aluminum foil to a mat material made of rubber molding, and then gluing another mat material made of rubber molding on top of it (see B.
), FIG. 6C shows the structure of the floor mats 1 to MAT, R. Referring to this figure, the floor mats M A T R
pt is made of two mat materials G M ATl and GMAT2
The configuration is such that a detection electrode FMSa made of aluminum foil is sandwiched between the electrodes. A connection terminal C0NN is formed at one end of the detection electrode FMS. Other floor mats MAT P R, MAT F L and MAT
□1 is also constructed in the same way as the floor mat MAT RR.

That is, each detection electrode FMS p RI FMS FL,
FMSRR and FMSRL are FR seats and FL seats.

Roof L00F across the space including RR and RL seats
Since the capacitors for detecting an occupant are formed by facing the respective detection electrodes, the connection terminal C0NN of each detection electrode is connected to the second
The detection terminal of the occupant detection circuit (AMS FR, A
MS F L, AMS RR2 (terminals labeled AMSRL).

Door 1~Rim'rRM F Rt T RM F L
, T RM R8 and T RM RL are respectively door D ORF RIDo RF LI Do
This is the inner lining of the RRR and D ORRL, and as mentioned above, it is constructed by gluing aluminum foil to a hardboard trim substrate, and then gluing a vinyl chloride sheet trim cover over the exposed surface (as mentioned above). D). 6th
Figure d shows a partial sectional view of the door trim TRM t=p<;
are trim board TRMb and trim cover TRMc
Detection of aluminum foil by tltM D M S
F=R is sandwiched between them. Detection electrode D
Although not shown, a connection terminal C0NN similar to that in FIG. 6c is formed at one end of M S p pt. The other door trims TRMFL, TRMRQ, and TRMRL are configured similarly to the door trim TRMFR.

In other words, each detection electrode DMSpn+ l3M5FLID
MSR fee and D M S pc L are l'R seats, F
L seat.

Roof L00F across the space including RR and RL seats
Since the capacitors for detecting an occupant are formed by facing the respective detection electrodes, the connection terminal C0NN of each detection electrode is connected to the second
Detection terminal of the occupant detection circuit (A M S P
R I A M S P L I A M S R A I
A M S Q L terminal).

Figure 6d shows an implementation in which part of the occupant detection circuit F M OL RR is molded on a part (hatching part) of the detection electrode FMSPL, and is connected to the remaining circuits of the occupant detection circuit by a 3-pole connector COH. This is an example. Although not shown, other detection electrodes FMSFR, FMSFL
, F M S RL , D M S F R, D
MSFLIDMSRR and DMS scale are similarly configured.

See Figure 7c. Although only the passenger detection circuit 12PR for the FR seat is shown in detail in FIG. 7c, other detection circuits 1
2FLl 12RR and 12RL also have the same configuration.

In Fig. 7c, the circuit DMOf-F surrounded by the two-dot chain line
R and F M OL p R are the detection electrodes of the door trim TRMFR of F R D M S FF & and FR
Detection electrode F' M of floor mat M A T F R
This is a circuit molded into SFR. These DM
The operations of OL p R and F M OL F R are as described above.

Its output voltage (the voum mentioned above) is the 3-pole connector CON
is given to S G p n via. In S G Fp, D M OL F R and F M OL respectively.
The output of PR is DC amplified in AMP, binarized in BIN, and then synthesized in Antogame-1-AN.

〔Effect of the invention〕

As described above, according to the present invention, the presence or absence of an occupant is detected by the change in the capacitance of the capacitor for detecting an occupant, which is composed of a pair of electrodes and a space for accommodating the occupant. Highly durable. Furthermore, since it is only necessary to detect changes in capacitance, the configuration becomes extremely simple.

Furthermore, the detection electrode can be easily attached to the door 1 to the rim, the floor pine 1, or by incorporating a metal plate into the armrest shade, or by forming a layer of conductive paint. It can be configured as follows.
By using a body ground for the electrode facing the detection electrode, it is less susceptible to external noise and the reliability of detection can be improved.

[Brief explanation of drawings]

FIG. 1a is a block diagram showing the configuration of the present invention, FIG. 1b is an equivalent circuit of the detection circuit shown in FIG. 1a, and FIG. 1C is a graph showing the characteristics of a diode. FIG. 2a is a circuit diagram showing an overview of a power window control system according to an embodiment of the present invention, FIG. 2b is a circuit diagram showing details of the input input circuit 8 of the system shown in FIG. 1a, and FIG.
FIG. C is a circuit diagram showing details of the occupant detection circuit 12 of the system shown in FIG. 1a. Figure 3a is a side view of the driver's seat of the vehicle seen from the side, Figure 3b is a partially cutaway perspective view of the armrest A RM RR, and Figure 3C is a sectional view of 1■c-mcw in Figure 3b. be. Figure 4a is a side view showing an outline of the mechanism of the passenger door of the vehicle;
Fig. 4b is an enlarged perspective view of the electric mechanism, and Fig. 4c is a sectional view taken along IV C--C in Fig. 4a. Fig. 5 is a flowchart showing the general operation of the MPU 7 shown in Fig. 2a. . FIG. 6a is a perspective view of the inside of the vehicle, and FIG. 6b is a perspective view of the inside of the vehicle. FIGS. 6c and 6d are perspective views for explaining the assembly of electrodes in another embodiment of the present invention, respectively. FIG. 7 is a circuit diagram showing an occupant detection circuit in another embodiment of the present invention. FIG. 8a is a partial sectional view showing a conventional seat switch, and FIG. 8b is a partially enlarged view thereof. Figures 9a and 9b are configuration diagrams for explaining the configuration of a floor mat with built-in electrodes, Figures 9C and 9d are configuration diagrams for explaining the configuration of a door trim with built-in electrodes, and Figure 9e is an armrest with built-in electrodes. FIG. 2 is a configuration diagram for explaining the configuration of. Figures 10a, 10c, 1oe, 102, 10i and 10 are 11! FIG. 10 is a side view for explaining the shape of the electrode of the pole-integrated armrest;
Figure b, Figure 10d, Figure 10f. Figures 10h, 10j, and 1012 are each cross-sectional views of the left drawing. l: Passenger door 2: Window glass 3++32" link arm 4: Sector gear 5: Worm wheel assembly 6: Weather strip 7: Microcomputer 8: Input switch circuit 9: Drive circuit lO-power supply circuit 11: FFI style Inspection detection circuit: Occupant detection circuit (detection means) 100: Seating switch 101: Movable contact 102: Fixed contact 110: Seat cushion force bar 120: Seat cushion pad! 30: Pad support [40: Seat cushion spring 150: Seat frame SLP: Center body villa QLP: Quarter lock pillar ROOF: Roof (body ground) OSC: Oscillator LPF: Low-pass filter Co
, C: Capacitor C, R: Capacitor (capacitor for occupant detection) C8:
Capacitor (reference capacitor) D I r D2 r D3 + D4: Diode MAN: Passenger Fior: Floor (body ground)
AMP: DC amplifier BIN: Binarization circuit AMS
F Rr A M S F L, A M S RR
, AMS FtL. D M S P R, D M S P L, D M
S RR, D M S HL IF M S P R
, F M S p L , F M S RR, F M
SRL: Detection electrode (electrode) ARMFR, ARMFL, ARM
RR, A RM RL Near-Mrest ARMb Near-Mrest base (armrest base material) IN
S: Insert ARMcH armrest 1 to cover (armrest skin) MTLb, MTLd, MTLg: Metal plate (metal plate) M
T L c , M T L e : Metal layer (conductive paint layer) D ORF R, D ORF L, D O
RRR, D ORRL: Door T RM F RI T RM F L, T RM
□R, T RM B L Nidoor trim TRMb Nidoor trim board (door trim base material) TRMc
Door trim cover (door trim skin) M A T F
RI M A T P L, M A T FtR
, M A T RL = Floor mat C0NN, CON: Connector M S F RI M S F L I M S RR
I M S RL: Limit switch OCF Rr ○CF L I OCRRI OCRL
: F7 Curtency switch D L P Rp D L p L I D L RR
, D L RL Ni door lock/unlock switch RYI, RY2. RY3. RY4. RY5. RY6,R
Y7. RY8: Relay patent applicant Aisin Seiki Co., Ltd. Door 38 ROOF for IN) Vehicle 4a figure = rgc Voice 4b ID Figure 9c Voice 10a Figure 10b IZ% loc o
Cloth 10d Map East 10e Map East 10f
Figure 10, Figure 101, Figure East 98, Figure City 9b, Figure 9c ＼-ゝFigure 9d Procedural Orthographic Export) November 8, 1986

Claims (16)

[Claims] (1) At least one capacitor for occupant detection, consisting of a pair of electrodes and a space for accommodating an occupant, on the moving object; and detection for detecting a change in capacitance of the capacitor for occupant detection. An occupant detection device comprising: means; (2) The occupant detection device according to claim 1, wherein the number of the occupant detection capacitors is plural; and the detection means detects a change in capacitance of each of the occupant detection capacitors. (3) The moving object is a vehicle; one of the electrodes is an electrode plate installed along an armrest provided on a door trim, and the other is a body ground.
The occupant detection device described in section 1). (4) One of the electrodes is a metal electrode plate inserted between an armrest base material and an armrest skin of an armrest provided in a door trim of a vehicle.
The occupant detection device described in section 3). (5) The occupant detection device according to claim (3), wherein one of the electrodes is a layer of conductive paint applied to an armrest skin of an armrest provided in a door trim of a vehicle. (6) There is a plurality of capacitors for occupant detection, and each capacitor for occupant detection is connected to an electrode plate installed along each armrest of the vehicle, a body ground, and a space including the passenger seat corresponding to each armrest. The occupant detection device according to claim 3, wherein the detection means detects a change in capacitance of each of the occupant detection capacitors. (7) The vehicle according to claim 1, wherein the moving object is a vehicle; one of the electrodes is an electrode plate installed along the inner surface of the door of the vehicle, and the other is a body ground. Detection device. (8) One of the electrodes is a metal electrode plate inserted between the door trim base material and the door trim skin of the door trim,
Claim No. 7, wherein the other is body ground.
Occupant detection device as described in section. (9) The occupant detection device according to claim 7, wherein one of the electrodes is a layer of conductive paint applied to a door trim base material of the door trim, and the other electrode is body ground. (10) The occupant detection device according to claim 7, wherein one of the electrodes is a layer of conductive paint applied to the door trim skin of the door trim, and the other electrode is body ground. (11) The number of the capacitors for occupant detection is plural;
Each occupant detection capacitor consists of an electrode plate installed along the inside surface of each door of the vehicle, a body ground, and a space including the passenger seat adjacent to each door; the detection means includes the respective occupant detection capacitor. The occupant detection device according to claim 7, which detects a change in capacitance of the vehicle. (12) The vehicle according to claim 1, wherein the moving body is a vehicle; one of the electrodes is an electrode plate installed along the inner surface of the floor of the vehicle, and the other is a body ground. Detection device. (13) The occupant detection device according to claim 12, wherein one of the electrodes is a metal electrode plate incorporated into a floor mat, and the other is a body ground. (14) The occupant detection device according to claim 12, wherein one of the electrodes is a layer of conductive paint incorporated into a floor mat, and the other is body ground. (15) The number of the capacitors for occupant detection is plural;
Each passenger detection capacitor is connected to an electrode plate laid along the floor of each passenger seat of the vehicle, the body ground,
The occupant detecting device according to claim 12, wherein the detecting means detects a change in capacitance of each occupant detecting capacitor, comprising a space including each occupant seat. (16) Claim (1) above, wherein the detection means has a reference capacitor and is a comparison circuit that compares the capacitance of the reference capacitor with the capacitance of the capacitor for detecting the occupant; The occupant detection device according to item (2), item (3), item (7), or item (12).