JPS5860310A - Controlling device for on-vehicle equipment - Google Patents

Abstract

PURPOSE:To drive and stop a driving device easily and precisely without the influences of car oscillation and temperature change, by providing the titled device with a comparing means for comparing signals outputted from two latch means and a driver driving a driving means by a driving signal. CONSTITUTION:When a required position is specified in an operation part 1, a position signal is inputted to a latch circuit 2 and a chattering preventing circuit 3 and the waveform of the position signal is shaped by the circuit 3. The rise of the shaped signal (a) is detected by a rise detector 4 and the detected signal (b) is inputted to the circuit 2. At the input of the signal (b), the circuit 2 latches the position signal and outputs the signal as a digital code signal to a comparator 5. On the other hand, an actuator 6 is located on a position at the initial state and a signal (d) is in the high level (H), so that a latch circuit 9 is unlatched and the position signal at that time is inputted to the circuit as it is as a digital code signal. The circuit 5 compares two digital code signals and, at the dissidence of the signals, outputs a signal to a driver 10, which outputs a positive/negative rotation controlling signal (c).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for in-vehicle equipment, such as a headlight optical axis adjustment device, a ventilation system, a window opening/closing device, and the like.

Conventional in-vehicle devices such as headlight optical axis adjustment devices have often been hydraulic or manual wire systems, but these have complicated mechanical configurations and are prone to mechanical damage and wear, resulting in failures. The above-mentioned drawbacks are especially noticeable in devices located far away from the driver's seat. there was.

Therefore, many vehicles are now being used in which on-vehicle equipment is driven by electrically controlling drive means such as motors. There are two types of such electrical control means: a simple switching type of operation switch, and a servo type that drives the controlled device until the position of the operating member matches the position of the controlled device, but the latter is more effective. It is excellent in that it is possible to confirm whether the control device has been driven to the correct position.

Furthermore, the above-mentioned servo system includes a potentiometer system and a system in which electrical resistance is switched stepwise between the operation side and the controlled device side. However, according to the above-mentioned potentiometer method, when the operating potentiometer fluctuates due to vehicle vibrations, the controlled device also fluctuates accordingly, and when the resistance value changes due to temperature changes inside the vehicle, the controlled device also fluctuates accordingly. The disadvantage is that the control position changes accordingly. Moreover, since vibrations cannot be avoided in a vehicle and temperature differences are large, the above-mentioned drawbacks become more noticeable. 1. The method of changing the electric and pneumatic resistors in stages eliminates the disadvantages of the potentiometer method, but if you try to drive the controlled device in a way that faithfully corresponds to the position of the operating section, The changeover switch on the operation side or the changeover switch on the side of the controlled device needs to be special, such as having a movable contact piece contacting multiple fixed contact pieces at one switching position. Since the stop position of the device is determined by the stepwise position of the code, the relative accuracy of the code must be very high. It is difficult to stop the system.

The purpose of the present invention is to eliminate the drawbacks of the conventional devices mentioned above, that is, to eliminate the effects of vehicle vibrations and temperature changes, to be simple,
An object of the present invention is to provide a control device for in-vehicle equipment that can easily and accurately drive and stop a driven device.

The present invention will be explained below with reference to illustrated embodiments.

In FIG. 1, the operating unit 1 has an appropriate number of pushbutton switches, for example four, and any positive or negative switch. When the main switch is pressed, a position signal 4 is applied to the ;-, l- and -ch circuits 2, as well as to a chattering prevention circuit 3, which is a waveform shaping circuit. The output of the chattering prevention circuit 3 is applied to a rising edge detection circuit 4 formed of an integrating circuit or the like, and the output of the rising edge detection circuit 4 is applied to the latch circuit 2 as a latch signal. The launch circuit 2 launches the position signal from the operation unit 1 depending on the fall of the signal from the rise detection circuit 4, and sends this latched position signal to the comparison circuit 5.
It is designed to be added to There is still a drive motor 7 and an actuator position detector 8 that moves in conjunction with the actuator driven by the motor 7 next to the actuator 6 of the controlled device, and the actuator position detector 8 detects a holding pulse at each position of the actuator 4. signal d
It has a part that generates a position signal e and a part that generates a position signal e at that time, and each of the signals d and e is applied to a latch circuit 9. The latch circuit 9 is manually supplied with the holding pulse signal d. The position signal e at that time is latched, and the latched position signal is applied to the comparison circuit 5. The comparison circuit 5 compares the two position signals and sends the difference signal to the driver 10.
In addition, the driver 10 rotates the motor 7 in the forward and reverse directions according to the difference signal. Further, a position display section 11 is connected to the comparison circuit 5,
The position of the actuator 6 at that time is displayed.

Now, when a desired position is specified by pressing the appropriate push button switch on the operation unit 1, the position signal is input to the latch circuit 2 and the chattering prevention circuit 3, and the chattering prevention circuit 3 receives the position signal as shown in Fig. 2a. The rising edge of the shaped signal α whose waveform is shaped is detected by the rising edge detection circuit 4, and the detected signal is applied to the latch circuit 2. The latch circuit 2 launches the position signal when the signal is input to avoid the influence of chattering, and further inputs the latched position signal to the comparison circuit 5 as one digital code signal. On the other hand 1
．． The actuator 6 is initially in a certain position and the signal d is not rHJ, the launch circuit 9 is released from launch, and the actuator position signal at that time is applied to the comparator circuit 5 as the IT one digital code signal. .

Comparison circuit 5 compares the two digital code signals, and if they do not match, it determines whether the motor should rotate in the forward or reverse direction and outputs a signal to the driver 1O, which causes the driver 1oI/'i motor 7 to rotate in the normal or reverse direction. Outputs control signal C.

When the motor 7 starts rotating in this manner, the signal d becomes rLJ, and the current position signal of the actuator 6 is launched and continues until the next position. When the two digital code signals, which are position signals, match, the output of the comparison circuit 5 becomes zero, the motor 7 stops, and the actuator 6 stops at that position. The position of the actuator 6 is displayed on the display section 11. It is assumed that the position signal e of the actuator 6 is sufficiently longer than the signal d, as shown in FIG.

Next, the embodiment shown in FIG. 3, which further embodies the configuration shown in FIG. 1, will be described. In FIG. 3, the operation unit 1 has four operation switches swo and sw into which position signals should be input.
1, 8w2, and sw3, and by selectively operating these switches, the position signal is encoded into a binary number and input to the latch circuit 2. That is, the switch SWo is in the 0 position, the switch swI is in the ■ position, the switch sw2 is in the Hm position, and the switch f SW3 is in the m position.The output signals A and B of the operating section are as shown in FIG. As shown, rO, Oj at the 0 position, ro, IJ at the ■ position, rl, Oj, m at the m position.
The positions are rl and lj. The latch circuit 2 consists of two D latch circuits 15 and 16,
The signal A/i from the operating section 1 is applied to the data input terminal D1 of the first latch circuit 15, and the signal B from the operating section 1 is applied to the data input terminal D2 of the second latch circuit 16. In addition, each switch SWo to 5W of the operation unit 1
When -3 is operated, a signal FHj is applied to the chattering prevention circuit 3 via the OR gate O1. The chattering prevention circuit 3 includes an integrating circuit and the like, and constitutes a waveform shaping circuit as described above. The output of the chattering prevention circuit 3 is applied to a rising edge detection circuit 4 comprising an integrating circuit, an AND gate α1, etc., which detects the rising edge of the output signal of the chattering prevention circuit 3 and outputs the clock terminal of each launch circuit 15, 16. The rHJ signal is input to the CP. The latch circuits 15 and 16 launch the input terminals DI and D2 in response to the fall of the signal from the rising edge detection circuit 4, and output the latched data signals from the respective output terminals Ql and Q2. There is.

The actuator detection section 8 includes three sets of switches SWα.

Specific examples of SWb and SWC are constructed as shown in FIG. In FIG. 5, a disk-shaped substrate 18, which is made to rotate forward and backward around a center point O as the actuator of the controlled member moves, has a center point O.
The print pattern rom and the paired print pattern h1. b2 and a printed pattern α are formed, and furthermore, on the outer peripheral edge of the substrate 18,
Four print patterns C are formed at positions whose center angles form 90° with each other. Each of the above print patterns Co
The switch contact pieces COM, B', A', and C are in sliding contact with the rotation locus of the switch 5W (Z) in FIG. h
1. b2 and contact piece B' constitute switch SWh, pattern C and contact piece C constitute switch SWC, and pattern Co
m and the contact piece COM constitute a common contact point for each of the above switches, to which a power supply VDD is applied. Then, the printed circuit board 18 and each contact piece A', B', CO
The switches SWα and SWb constitute digital switches, and the state shown in Fig. 5 is the 0 position, the state shown in Fig. 6 is the I position, the state shown in Fig. 7 is the m position, and the state shown in Fig. 8 is the m position. position, and if the signal from the switch SWα is still A' and the signal from the switch SWz is B', the signals A' and B' are rO, as shown in FIG. 9, at the 0 position. 01, ■ position [0, lj, m position rl, OJ
, rl, 1] at the m position, so that the actuator position signal is output as a digital code signal. The switch SWc made of the printed pattern C and the contact piece C is arranged at each predetermined position Q, I, I1 . A holding pulse of "1" is output at each of the operation switches SWI and H in FIG.
When pressing one of SW4 (at this time, the actuator is in a predetermined position), switch SWC
A signal of "1" is output through the clock terminal C of the two D latch circuits 21 and 22 that constitute the latch circuit 9.
The latch circuits 21 and 22 output the digital code signals A' and B', which are applied to the data input terminals D3 and D4 via the switches SWα and SWh, from the respective output terminals Q and send them to the comparator circuit 5. It is now possible to add

In FIG. 3, the comparison circuit 5 is an AND gate a.

h, c, d, Noah gate e, and gate f.

g, h, or gate, no°, and gate k.

t, exclusive or game F n + ' +,
It has p. One of the signals A' and B' which are binarized as actuator position signals, A' is connected to the gates e and n.
.

p'+f is input to k, and is also applied to gate l via inverter ■2,
The other signal B' of the above signals A' and B' is connected to the gate '+'+7
', f. On the other hand, the position signal selected by the operation unit 1 is transmitted to the launch circuit "
It is output as signals A and B which are binarized from 2, and the signal A
. It has become. The output of the gate e is applied to the gate α and the 0 position signal input terminal of the position display section 11. The outputs of gates n and o are respectively applied to gate m, and the output of gate m is applied to gate a.
+ h + ' + d. The output of gate p is added to gates g, h, h, t, and the output of gate g is g, -)A.
The output of the gate h is applied to the gate C, and the output of the gate f is applied to the gate d and the position signal input terminal (2) of the position display section 11. The outputs of gates α and h are applied to gate B, and the outputs of gates c and d are applied to gate No. The output of gate B is applied as a normal rotation signal to gate No.

The outputs of are applied to the respective drivers 10 as reverse signals. Driver 10 is upper-pressure distribution.

The motor 7 is driven in forward and reverse directions based on the reverse rotation signal.

Now, assume that the operation switch SW3 of the operation unit 1 is pressed when the actuator position is 0, and thus the signals A' and B' are at ro and 0. By pressing the switch SW3, the position signals A and B become [1, l, and this "1.IJ signal is launched by the launch circuit 2 and added to the comparator circuit 5. Also, the actuator becomes 0.
When in the position, the signal applied to the clock terminal CP of each launch circuit 21.22 via the switch SWC is "1", so the launch circuits 21.22 are not latched, and the signals of A' and B' remain as they are. It is added to the comparison circuit 5. As a result, the gate C of the comparator circuit 5 is "1" and the gate m is "1", so the gate α is "1" and the gate L is "1", whereas the gate =)7) is "1". 0'', therefore, the gate value also becomes 0, and the driver 10 drives the motor 7 in the normal rotation direction, and the substrate 18 of FIG. It begins to rotate counterclockwise at .

When the board 18 rotates even slightly, the switch SWC is turned off and its output becomes "0", and the position signals A' and B' at that time, ro and Oj, are sent to the launch circuit 21.
．． 22, and the motor 7 continues to be driven.

In this way, when the actuator position reaches ■,
The circuit board 18 is arranged in a manner as shown in FIG. 6, and the contact piece C comes into contact with the printed pattern C, a signal of "1" is output from the switch SWC, and the launch of the ro and OJ signals in the latch circuit 9 is released. and the signals A' and B' are ro,
1 j, and now the gates p, y.

A signal of "1" is applied to the gate i via h, thereby continuously driving the actuator in the forward rotation direction. Due to this drive in the forward rotation direction, the switch SWC is immediately turned off, a latch signal of "O" is input to the latch circuit 9, and the rO, IJ times the signals A' and B' are launched, and the actuator U continues to be driven in the forward rotation direction. Ru. When the actuator reaches the position ■ and the board 18 is in the state shown in FIG. 7, the switch SWC outputs a signal of "1" to cancel the launch of the launch circuit 9, and the signals A' and B' becomes l'-1, OJ, and in this case also the gate p.

! , h is applied to the gate i, and the shear actuator is driven in the normal rotation direction as described above. When the actuator position reaches position ■ and the board 18 is in the state shown in FIG. , IJ, and the comparator circuit 5 uses its gate t+ to match the digital code signals A, B and other digital code signals A', B'.
Both outputs become rOJ, stopping the drive of the motor 7 through the driver 10 and stopping the actuator.

As described above, in the comparator circuit 5, the signals A, A', and B applied to the exclusive OR gates n and o are
and B', and if they do not match, then game)
” to each gate α.

Furthermore, regarding the direction of rotation, when the actuator is in position O, it is normal rotation, so when the gate α is selected, the button is opened, and when it is in position ■, the gate α is selected. Since it is a reverse rotation, the gate d is selected, and when the output signal A of the operation unit 1 is "l" in the positions ■ and ■, the rotation is in the forward direction.
When A is "0", it is reversed and gate b or gate C is selected via gate 1 or gate h, respectively. The outputs of these gates α, h, c, and d are applied to the driver 10 as forward or reverse rotation signals via gates A or N, which causes the actuator to rotate forward or reverse, and the actuator is driven by the operating section 1. When it reaches the specified position, it will stop there.

In addition, the actuator positions are gates a and l.
, and the positions 0°1 and II are respectively set by the signal “1” applied to the position display section 11 through f.
, rlI are displayed.

The above-mentioned operation for determining forward rotation, reverse rotation, and stoppage of the actuator is performed as shown in the flowchart of FIG.

In the embodiments described above, a sliding contact was used for the actuator position detection section 8, but a reed switch and a magnet, a microsinch and a cam, a leaf switch and a cam,
It may be a combination of a Hall element and a magnet, or a photo interrupter or the like may be used. The comparison circuit 5 may also use a magnitude comparator, a microprocessor, or the like. In addition, the switches SWo, SWl, SW of the operation unit 1
2. By changing SW3 to a predetermined sensor, position control can be performed automatically. For example, if it is a beam adjustment device for a car headlamp,
The first beam is automatically adjusted up and down by using a vehicle height sensor, a beam sensor from an oncoming vehicle, etc.
The embodiment shown in FIG. 1 will be explained. The embodiment of FIG.
In the embodiment shown in FIG. 3, input to the operation switches SWQ to SW3 is prohibited while the actuator is in operation. Specifically, the signal from the operation unit to the chattering prevention circuit 3 is applied through the AND gate α2, and as shown in FIG. 12, one of the operation switches SWo to SW3 is operated. obtained by. <The second Norse signal obtained by detecting the falling edge of the pulse signal A sets the R-S flip-flop circuit FF, and also sets the rising edge of the mismatched output signals of the signals A and A' and B and B'. A force signal is obtained by resetting the flip-flop circuit FF by the pulse O outputted at the time of falling, so that while the two mismatching signals of the signals A and A' and B and B' exist, i.e. , ``During operation of the actuator, by controlling the gate α2, the latch signal generated by the operation of the operation switches SWo to SW3 is blocked in the chattering prevention circuit 3, and the lunch cycle is prohibited.

In the embodiment shown in FIG. 13, the actuator position display section 11 in FIG.
The actuator position is also used as a display section for the position specified by the operation of SW3, and the actuator position is displayed with continuous lighting, and the specified position is displayed with blinking. in particular,
The embodiment of FIG. 3 includes an oscillation circuit O3C, a NOR gate q,
AND gate (Z3.α4.a5 and AND gate r
, S , t , u, and the or gate v, w, x, y
is added, and the actuator position is displayed continuously through the OR gates υIw, X, and y.
Also, while the actuator is operating, that is, while the mismatch signals of signals A and A' and B and B' are being output, the oscillator O8
C emits a signal at predetermined time intervals, and the operation switch S
Gates q, α3 . α4
゜One of α5 outputs a “1” signal and game) r+S+
t and u are opened, and the light emitting element at the designated position is configured to blink in response to a signal from the oscillator O8C applied through one of the opened gates.

FIG. 14 shows an example of a position display section and an operation section that can be used in the embodiment of FIG. 13, and also shows the operating state of the embodiment of FIG. Push button switch sw, ) , SWi , , SW2゜sw
3, and the display section has light emitting elements LO, L'l, L2゜L3 provided above each pushbutton switch.
When the actuator is in the 0 position, the light emitting element LO lights up continuously as shown in Figure 14 (A) to indicate that the actuator is in the 0 position. When is pressed, the light emitting element L2 blinks to indicate that the designated position is the ■ position, as shown in Figure 14 (a), and this position designation causes the actuator to move to the position ■. As you move toward the
The actuator moves sequentially as in 2, and the actuator is in position ■
When the light emitting element L2 is stopped, the light emitting element L2 lights up continuously and the blinking operation stops. By employing such a display device, the operating status of the control device can be more clearly understood.

Note that in the claims, the "digital code output forming track" refers to the signal A' in the embodiment.
, B' print pattern α, h, ,
h2, etc., the ``latch signal formation and positioning track J'' is the printed pattern C, the ``code holding body'' is the board 18, and the ``detection means'' are the contact pieces C and A'.
, B', COM, the "driving means" is the motor 7, the "latch release area" is the peripheral part of the board 18 other than the printed pattern C, and the "latch area" is the printed pattern C is within the range of

As described above, the present invention is not limited to what is shown in the embodiments, but can be freely modified in design without departing from the scope of the claims. For example, in the embodiment, the board 18, which is the code holding body, is moved, but the contact pieces C, A', and B, which are the detection means, are moved.
', COM may be moved. Further, the code holding body may be a rectangle, and each code may be formed in parallel to the rectangular shape in a straight line, so that the code holding body or the detection means can be moved in the linear direction.

According to the present invention, the following effects are achieved.

(Since the signals from the operation side and the controlled device are digitally encoded, there is almost no effect from vehicle vibration or temperature changes, and soft-touch switches can be used, improving operability. can be achieved.

(2) Accurate positioning of the actuator is possible because it has a latch and positioning track, and the code output forming track on the code holding body for positioning the actuator is extremely rough. Since it can be used in practical applications even at low temperatures, it is easy to manufacture and has improved reliability.

(3) Since the track for latch signal formation and positioning is sufficiently smaller than the code output formation track in the code holding body, it is easy to change the latch (signal generation part or code output formation track part). It is also possible to significantly change the amount of drive of the actuator and therefore the amount of movement of the controlled device.

(4) Even when the actuator position detecting section consisting of the operating switch, the cord holding body, and the detecting means is of a contact type, the effects of cracking and yattering can be prevented because a latch circuit is used.

(5) Since it is controlled by digital signals, it is easy to use a microcomputer for control, and it is possible to use an existing converter as a control converter for various devices in the vehicle. It is also easy to configure a fully automatic system.

In addition, according to the illustrated embodiment, since the comparator circuit is constituted by a simple gate circuit, the overall configuration is simplified. Further, the embodiment shown in FIG. 13 has the advantage that it is possible to display the position of the operation switch, the position of the actuator, and the operating status, making confirmation and operation easier.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a timing chart for explaining the operation of the above embodiment, Fig. 3 is a circuit diagram embodying the above embodiment, and Fig. 4 5 is a front view showing an example of the actuator position detection section that can be used in the above embodiment, and FIGS. 6 to 8 are the same as the actuator position detection section. FIG. 9 is a timing chart showing the signals obtained by each operation mode of the actuator position detection section, FIG. 10 is a flowchart showing the operation of the embodiment of FIG. 3,
FIG. 11 is a circuit diagram showing another embodiment of the present invention, FIG. 12 is a timing chart for explaining the operation of the same embodiment, and FIG. 13 is a circuit diagram showing still another embodiment of the present invention. FIG. 14 is a front view showing an example of an operating section and a display section that can be used in the above embodiment. 1...Operation section, 2...Utsuchi hand attack, -3.
・・Chatau O

Claims (1)

[Scope of Claims] A code holding body having a plurality of digital code output formation tracks and a latch signal formation/positioning track, a detection means for detecting and outputting a signal from each track of the code holding body, and a controlled object. a driving means for driving the code holding body or the detecting means together with the driving of the member; outputs a digital code signal, while
When the detection means is located in the launch area of the latch signal forming and positioning track, the detection means latches the first digital code signal input at that time to the latch signal obtained by the detection means, and a first launching means that outputs the latched signal until the detection means is located in the latch release area; a signal generating means that generates a second digital code signal by automatic or manual operation; and the second digital code. a second latch means for launching the signal and outputting the latched signal; and a comparison means for comparing the signals output by the first and second latch means and generating a drive signal if they are different. and a driver for driving the drive means in accordance with the drive signal.