JPH0327714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic door opening/closing device suitable for, for example, automobiles having sliding doors.

[Conventional technology]

Conventionally, there have been ways to lock and unlock car doors by remote control using sound waves or light, but there is no way to open or close them automatically.

Additionally, doors that open and close using electric switches are used in passenger buses, taxis, etc., but for safety reasons, it is not practical to open and close the doors automatically at the same time as locking and unlocking the door lock. Not there.

[Problem to be solved by the invention]

Recently, panel van-shaped vehicles are being used frequently for business purposes, and in this case, it is extremely difficult to open and close the doors while handling cargo, and considering that the work is done on the road, automation of this is highly desirable. This is the current situation.

Furthermore, considering the safety of cargo, the risk of vehicles running out of control due to mischief by children, and vehicle theft, there is a social need for automatic door devices that can open automatically when necessary and then close automatically. ing.

The present invention has been made in view of the above-mentioned circumstances, and allows the door to be automatically opened and closed even when both hands are occupied when loading cargo in a vehicle, etc., thereby ensuring the safety of the vehicle and cargo, and promptly carrying out work. The purpose is to bring about labor and economic effects.

[Means to solve the problem]

In order to achieve the above object, an automatic door device for an automobile according to the present invention automatically opens and closes a door using a transmitter that intermittently transmits a wireless code signal having a predetermined code pattern at a constant cycle. a receiving means for receiving the radio code signal from the transmitter; and when the receiving means is in a receiving state in which the intermittent radio code signal is continuously received; A non-receiving state in which the receiving state is interrupted for a predetermined period of time or longer is determined, and each continuous radio code received by the receiving means in each of the receiving states before and after the non-receiving state is determined. decoding means for discriminating a received group of signals into a first command signal and a second command signal; opening an automobile door according to the differentiated first command signal; and opening a vehicle door according to the second command signal. The present invention is characterized by comprising a driving means for closing the automobile door.

[Effect]

In the above configuration, a radio signal from a transmitter that transmits a radio signal intermittently at a fixed period is received by the receiving means, and the decoding means is in a receiving state in which the intermittent radio signal is continuously received. , and determining a non-receiving state in which the receiving state is interrupted for a predetermined time longer than the period of the wireless signal;
From each continuous radio signal reception group received during each reception state before and after this non-reception state,
A first command signal and a second command signal are discriminated as timings for opening or closing the vehicle door, respectively. In other words, the door opening timing (first command signal) is given in the initial reception state, and in the non-reception state where the reception state is interrupted for a predetermined period of time or more, the door opening/closing operation is not performed, and when the reception state returns again. The door closing timing (second command signal) is given to. Then, the timing discriminated in this manner is applied to the driving means to drive the automobile door to open and close. Note that the non-receiving state is set as the time when the user does not request the opening/closing operation of the door, when a state in which a wireless signal is not continuously received continues for a predetermined period of time.

In this way, in the above configuration, the transmitter on the transmitting side is configured to transmit wireless signals intermittently at regular intervals, and the timing for both door opening and closing operations is generated on the receiving device side. be done.

〔Example〕

Next, one embodiment of the present invention will be described. 1st
In the figures and FIG. 2, reference numeral 1 indicates the body of an automobile having a sliding door. Reference numeral 2 denotes a sliding door mounted on the body 1 of the automobile, which has a structure that is opened and closed by sliding on a rail on the side of the body, and is of a generally known type. Reference numeral 3 denotes a transmitter that is carried by a person and transmits a code signal, and in this embodiment, an infrared light emitting diode is housed in a case and is clipped to a work hat. Therefore, it is possible to reliably transmit a code signal even if the front of the body is covered with luggage. Reference numeral 4 designates the entire transmission control device for driving the transmission section, which is housed in a case and can be stored in any pocket. The transmission control device 4 and the transmission section 3 are connected by a wire.

5 is a battery housed inside the transmission control device 4, and in this embodiment a mercury battery is used. 6
is a code setting section, which specifically uses eight small switches. Then, the transmitting side control circuit 7 inputs the switch state as a binary code, and a maximum of 255
You can create codes up to. The state of this switch is determined by the code setting unit 14 inside the car.
This corresponds to the switch state of the transmission control device 4 and the reception device 9, and by matching the key codes between the transmission control device 4 and the reception device 9, they can function as a key.

The transmission control circuit 7 is composed of a one-chip microcomputer to control the entire transmitter. There is a code setting section 6 inside the microcomputer.
There is a built-in program that reads the code and sends an optical signal from the transmitter 3 via the driver 8 at regular intervals. The driver 8 drives the light emitting diode of the transmitter 3, and is connected to the transmitter side control circuit 7.
After AM modulating the logic signal inputted from the light emitting diode, the AM modulated code signal is outputted as light by supplying it to the transmitter 3.

Reference numeral 9 indicates the entire receiving device mounted on the vehicle side. Reference numeral 10 denotes a power supply section, which generates a necessary voltage inside the receiving device 9 from a voltage from a battery in the vehicle (not shown) and supplies it to each section.
Note that in FIG. 2, the wiring state of the power supply is omitted for the sake of simplicity.

Reference numeral 11 denotes a receiving circuit, which uses a phototransistor as a light-receiving element in this embodiment, and is installed in the car body 1 at a position opposite to the transmitter 3 carried by a person, and converts an incoming optical signal into an electrical signal. It is something to do. Reference numeral 12 denotes an interface circuit which demodulates the optical signal converted into an electrical signal, converts it into a logic level signal, and outputs it to the receiving side control circuit 13.

The receiving side control circuit 13 is constituted by a microcomputer, and contains an operating program therein. 14 is a code setting section, which is composed of the same eight switches as the code setting section 6 in the transmission control device 4, and the codes that can be set are binary.
It is 255. This code is set in the transmission control device 4.
The code is set to be the same as the code of , and a one-to-one correspondence is maintained between the transmission control device 4 and the reception device 9.

15 is a motor drive circuit, and the receiving side control circuit 13
The motor 16 is driven in the positive and negative rotation directions according to commands from the controller. The motor 16 is a DC motor.

Although not shown, a belt is hung on the shaft of the motor 16 via a pulley, similar to a general automatic door, and a part of this belt is attached to the door 2 of the car.
The forward rotation of the motor 16 moves the door 2 in the opening direction, and the reverse rotation moves the door 2 in the closing direction.

Reference numeral 17 denotes a door position detection device, which is composed of two limit switches. One of the limit switches generates an open signal when the door 2 is fully open, and the other generates a close signal when the door 2 is fully closed. Then, the receiving side control circuit 1 detects two states: when the motor 16 rotates in the forward direction and the door 2 moves in the opening direction and becomes fully open, and when it rotates in the reverse direction and becomes fully closed.
Output to 3.

18 is an electric lock, and when the door position detection device 17 detects that the door 2 is fully closed, the receiving side control circuit 13 outputs a locking signal and locks the electric lock 1.
8 is in a locked state. Further, after processing the optical code signal arriving at the light receiving section, at the timing to unlock, the receiving side control circuit 13 outputs an unlocking signal, and the electric lock 18 becomes unlocked.

Next, the operation of this embodiment will be explained. First, the transmission control circuit 7 inputs the state of the code setting section 6 of the transmission control device 4 . Then, the code signal is outputted to the driver 8 at regular intervals. The contents of the code are 8-bit header code (10101010) as shown in Figure 4.
There are 8 bits of data between the 8-bit stop code (01010101) and the 8-bit stop code (01010101). The 8 bits of data insert the states of 8 switches in the code setting section 6.

The output interval to the driver 8 is a constant cycle, and in this embodiment, the output is performed once every second. Also, the data transmission speed is 1 bit in this example.
It is set to 10ms, and it takes 240ms to transmit 24 bits. In the driver 8, the transmitting side control circuit 7
“1” of the 24-bit code signal input from
A logic level signal of "0" is AM-modulated to drive a light emitting diode constituting the transmitting section 3. Therefore, the transmitter 3 outputs a code signal unique to the transmitter control device 4 as an infrared light signal once per second. When the receiving circuit 11 receives this optical signal, it converts it into an electrical signal using a phototransistor, and the interface circuit 12 amplifies and demodulates this signal, and further performs level conversion to a logic level signal, and then sends the signal to the receiving side. Control circuit 13
Output to. The receiving side control circuit 13 receives this signal and sequentially stores it in its internal memory. When the reception of the continuous 24-bit code signal is completed, the header code and stop code are checked, and if they are correct, the data and the state of the code setting section 14 are compared. When the codes match, it means that one reception and verification have been completed.

Next, the timing of locking/unlocking the door and the timing of opening/closing the door will be explained. In FIG. 3, diagram a shows a case where code signals are continuously received;
In this case, it is considered to be the first reception. Next, in the case of Figure b, there is no code reception for a time T after the first reception, and then the code signal is continuously received again. Continuous reception is defined as the second time. This time T is programmed to be started by the receiving side control circuit 13 itself every time one reception (reception and verification) is completed within one second. In this way, after the receiving device is powered on, consecutive receptions at time intervals of T or more are numbered to distinguish them as odd-numbered and even-numbered receptions.

In this embodiment, the value of T is set to 20 seconds. The timing of unlocking is set at the beginning of the odd number of receptions as shown in Fig. 3c, and is indicated by the symbol _T1 in Fig. 3. After unlocking at timing _T1 , the receiving side control circuit 13 automatically outputs a door opening signal to the motor drive circuit 15 to start opening the door, and when the door 2 is fully opened, the door position detection device 17
detects this and sends a detection signal to the receiving side control circuit 13, so that the receiving side control circuit 13 outputs a motor stop signal to stop the motor.

Thereafter, for example, when a person enters the vehicle, returns to the outside of the vehicle after handling the cargo, and places the transmitting section 3 facing the receiving circuit 11, the even-numbered code reception starts.

Then, humans change direction at any time,
When the transmitter 3 no longer faces the receiver circuit 11,
Assuming that the even-numbered reception has ended (this is defined as T ₂ ), the receiving side control circuit 13 starts the motor drive circuit 15.
A door closing signal is output to the motor 16, and the motor 16 is rotated in the reverse direction to begin the door closing operation. Then, when the door 2 becomes fully closed, the door position detection device 17 sends a signal to the receiving side control circuit 13. As a result, the receiving side control circuit 1
3 outputs a motor stop signal, which causes the motor 16 to stop (this corresponds to the timing T3 in FIG. ₃ ). At the same time, the receiving side control circuit 13 sends a locking signal to the electric lock 18 at timing _T3 .
and the door 2 is locked.

As mentioned above, by counting continuous reception as one time and setting the reception stop to 20 seconds, 20
All codes received at intervals of less than a second can be recognized as being received at the same time. This means that if you approach the vehicle while carrying your luggage, the door will open automatically, and will not close even if you look away for less than 20 seconds. It is easy to find the right time to get on and off the vehicle, and it is easier to use than a simple automatic door.

In this way, this embodiment makes it possible to automatically unlock, open, close, and lock the door even when both hands are full, which not only improves cargo handling efficiency but also greatly improves cargo safety. It can be effective.

In addition, in this embodiment, the transmitter is configured to transmit the code signal intermittently at a constant cycle, and a circuit for generating individual timings for the opening/closing operation of the door 2 is not required. The container can be made smaller.

In the above embodiment, light was used as a means of propagating the code signal, but other methods such as weak radio waves,
It is clear that this can also be easily carried out using sound waves.

〔Effect of the invention〕

As described above, in the present invention, the door opening/closing timing is generated on the receiving device side, so there is no need to generate the timing from the transmitting side, and the transmitting side, that is, the transmitter, can be operated by the user. It is possible to automatically open and close the door without any operation, and it has the excellent effect of being able to automatically open and close the door even when both hands are occupied, such as when loading luggage in a vehicle. .

Furthermore, in the present invention, the transmitter is configured to transmit wireless signals intermittently at a fixed period, and an individual timing generation system for door opening/closing operations is not required in the transmitter side circuit. This has the advantage that it can be configured in a small size.

[Brief explanation of the drawing]

FIG. 1 is an overall conceptual diagram showing an embodiment of the device of the present invention, FIG. 2 is a block diagram showing the configuration of the embodiment of the present invention shown in FIG. 1, and FIG. The timing chart in FIG. 4 is an explanatory diagram of the transmission signal. 1...Automobile body, 2...Door, 3, 4...
A transmitting section and a transmitting control device forming a transmitter, 6... code setting section, 7... transmitting side control circuit, 11... receiving circuit, 13... receiving side control circuit forming decoding means,
14... Code setting unit, 15... Motor drive circuit, 16... Door drive motor, 18... Electric lock.

Claims (1)

[Scope of Claims] 1. An automatic door device for an automobile that automatically opens and closes a door using a transmitter that intermittently transmits a wireless code signal having a predetermined code pattern at a constant cycle, comprising: receiving means for receiving the wireless code signal; and in a receiving state in which the receiving means continuously receives the intermittent wireless code signal, and for a predetermined time period that is longer than the period of the wireless code signal. determining a non-receiving state in which the receiving state is interrupted, and receiving groups of successive radio code signals received by the receiving means during each of the receiving states before and after the non-receiving state; disconnection means for discriminating into a first command signal and a second command signal; opening an automobile door according to the differentiated first command signal; and closing the automobile door according to the second command signal; An automatic door device for an automobile, comprising: a driving means for driving; and an automatic door device for an automobile. 2. The decoder according to claim 1, wherein the decoding means generates a first command signal at an odd number of successive code signals received and a second command signal at an even number of successive code signals received. Automatic door device for automobiles. 3. The automobile automatic according to claim 1 or 2, wherein the decoding means includes a function of comparing a code pattern of a wireless code signal transmitted from the transmitter. door device. 4. A patent claim characterized in that the timing for opening the vehicle door by the driving means is given by the generation of the first command signal, while the timing for closing the vehicle door is given by the disappearance of the second command signal. An automatic door device for an automobile according to any one of items 1 to 3. 5. The automatic door device for a motor vehicle according to any one of claims 1 to 4, wherein the driving means includes a function of locking and unlocking a motor vehicle door. 6. Claim 1, wherein the transmitter is configured with a transmitting section that emits a wireless code signal and a control section that controls the transmitting section separated from each other.
The automatic door device for an automobile according to any one of items 1 to 5. 7. The automatic door device for an automobile according to claim 6, wherein at least the transmitting portion of the transmitter is configured to be detachably attached to a work cap.