JPH0362872B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a code input type load driving device.

For example, a car door lock device holds the door closed by engaging a latch and a striker when the door is closed, and locks the striker by moving the latch in conjunction with the operation of the inside door handle or outside door handle. The closed state is released by disengaging the closed state. It also has a door lock function that restricts the movement of the latch in conjunction with the operation of the inside lock knob or the key cylinder provided on the door outer panel, and prevents the latch from following the operation of the inside door handle, etc. There is.

In order to enable the door to be opened and closed by operating the door handle, the conventional method of unlocking the door was to insert the key and rotate the key cylinder, but this type of device does not allow the door to be opened or closed by hand. It is difficult for people with disabilities to turn the key, and an electric actuator for driving the lock mechanism is provided, and by inputting coded information using a push button, the actuator is driven to operate the lock mechanism. However, this method has the problem that it can be easily played by children (see, for example, Japanese Patent Laid-Open No. 190877/1983).

For this reason, a system can be considered in which the door lock is released by inputting a predetermined code such as the length of ON-OFF time using Morse code using a single signal input switch (Figure 6). In this case, the length of the ON-OFF time may differ as the operator gets used to it, or if the operator is different, and it is difficult to set a standard for distinguishing the length of the ON-OFF time. This causes the problem that it is not possible to reliably identify whether a signal is correct or incorrect.

The present invention was made in view of the above circumstances, and
In order to be able to reliably identify the input ciphers, one cipher input means is used to input the on-off cipher, the time interval for each input signal is measured, and the input signal is determined based on the measured value. The number of blocks and the number of input signals in each block are made into one input code, and this input signal is compared with a predetermined code, and when it is correct, a predetermined load is automatically driven.

Furthermore, to specifically explain the configuration of the present invention, as shown in FIG. a measuring means for measuring the time interval of the measurement means; a threshold setting means for setting a threshold based on each measured value signal from the measuring means; and a measured value between the threshold signal from the threshold setting means and each input signal from the measuring means. Comparing means for sequentially comparing the measured value with the signal and outputting a determination signal as to whether the measured value is within the threshold value;
Based on the determination signal from the comparison means, when the measured value is within the threshold, the adjacent input signals are determined to be input signals in the same block, and when the measured value exceeds the threshold, the adjacent input signals are classified as separate blocks. an input signal dividing means that determines that the input signal is an input signal and divides the input signal into blocks, and collating input cryptographic information consisting of the number of blocks output from the input signal dividing means and the number of input signals in each block with predetermined cryptographic information. The input signal determining means outputs an output when it is determined that the signals match, and the driving means drives a predetermined load based on the output from the input signal determining means.

Each means constituting the present invention corresponds to the following in the embodiments described later.

That is, the code input means is the door handle pullback detection switch 2 and the door handle 18, and the measurement means, threshold value setting means, comparison means, input signal division means, and input signal judgment means are provided in the control unit 4 in the form of software. In the flowchart of FIG. 5, the measuring means is steps 209, 214-218, the threshold setting means is steps 223-227, the comparing means is steps 231-234, and the input signal dividing means is steps 223-227. The means are steps 235-239, and the input signal determining means is steps 240-244. Further, the driving means includes a buffer 14, a transistor 15, a relay 16, and an actuator 13 for driving the door lock.

Hereinafter, an embodiment in which the present invention is applied to a door lock device will be described in detail based on the drawings.

In FIG. 1, a door lock detection switch 1 connected in series to a power supply through a resistor is OFF when the door is locked and outputs an "H" level, and when the lock is released, it is ON and outputs an "L" level. A door handle retraction detection switch 2 connected in parallel with this door lock detection switch 1 is a second door handle pullback detection switch 2.
When the door handle 18 shown in the figure is normally returned, it is OFF and outputs an "H" level, and when the door handle 18 is pulled, it is turned ON and outputs an "L" level. The output of the door lock detection switch 1 is directly input to the input port 5 in the control unit 4 composed of a microcomputer, and the output of the door handle retraction detection switch 2 is input to the inverter 3.
is inverted and input to the input port 5.

In addition to the input port 5, the control unit 4 has an output port 6, a CPU 7, a ROM 8, and
It is composed of RAM9. 10 is connected to the transistor 12 by the output of the output port 6 connected to the base of the transistor 12 via the buffer 11.
This is a buzzer that sounds an alarm when conductivity occurs. 13
is a door lock drive actuator, and the output of output port 6 is connected to transistor 1 through buffer 14.
Transistor 15 is connected to the base of 5 and becomes conductive, energizing the relay 16 and switching its contact to the power supply side, thereby driving and unlocking the door.
That is, the door lock device is changed from a locked state to an unlocked state. By releasing the door lock, the door can be opened and closed freely by operating the door handle 18.

More specifically, when the door lock device is in the locked state, the movement of the latch that engages with the striker is regulated by the lock mechanism, and the latch does not follow the door handle operation, so even if the door handle is operated. The door cannot be opened because the latch and striker are not disengaged. In this door lock state, when the lock mechanism is operated by driving the actuator 13 to unlock the door, the regulation of the latch is released and the latch becomes interlocked with the door handle operation. The engagement with the striker can be released. Therefore, the door can be opened and closed freely using the door handle.

In addition, each switch 1, 2, actuator 13, buzzer 10, and control unit 4 are shown in FIG.
An example of implementation on a vehicle 17 is shown.

Next, an outline of the system of the present invention will be explained with reference to the flowchart of FIG.

First, when the door is closed and locked, door lock detection switch 1 turns OFF and input port 5
An "H" level signal is input to the door handle, and a standby state is entered in which a signal can be input from the door handle. When the door handle 18 is pulled in this state, the door handle pullback detection switch 2 is turned on and an "H" level signal is input to the input port 5 (step 101).
Then, this "H" level signal continues for more than 3 seconds,
That is, it is determined whether the operator has continued to pull the door handle 18 for 3 seconds or more (step 102), and if it is 3 seconds or more, the transistor 12 is made conductive by the output from the output port 6, and the buzzer 10 is sounded once to start inputting the code. (Step 103). Here, after the door handle 18 is returned, a code is input by operating the door handle (step 104).

The method of entering the code is to enter the number of times corresponding to the predetermined code number, for example, if the code number is 523, 5 times →
The door handle 18 is pulled back twice and then three times. In this pullback operation, the operation interval within each digit is made substantially constant, and the operation interval between each digit is set to a length different from the operation interval within each digit (for example, twice or more). To finish this code input operation, press the door handle 18 for 3 seconds.
Judgment is made based on whether or not the pull is continued (step
105), if it continues to be pulled for 3 seconds or more, the buzzer 10 will sound twice when the "H" level signal is input for 3 seconds to notify the end of the input (step 106). A time chart from the start of input to the end of input is shown in FIG.

When there is a signal indicating the end of input, the part of the input signal between the ON input signals of 3 seconds or more, which signals the start of input and the end of input, is regarded as a code, and a verification process is performed to see if this code input is correct. conduct.

In this verification process (indicated by the broken line in Figure 3), it is first determined whether the number of input signals of the code, that is, the number of operations of the door handle 18, is a predetermined number (5+2+3=10 in this case) (step 107). If the input signal is correct, the input signal is then blocked (step 108).
In this blocking, for example, the minimum interval time between each input signal is determined, and it is determined whether the interval time of each input signal is greater than the minimum value multiplied by 2. If it is smaller, the input signals before and after it are is regarded as an input signal within the same block, and if it is large, the input signals before and after it are regarded as separate blocks, thereby converting the input signal into blocks.

Next, it is determined whether the number of blocks obtained by this block formation is correct (in this case, it is 3 digits, so it is 3) or not (step 109), and if it is correct, the number of input signals in each block is determined. and whether the order is correct (in this case, the code was entered in the order of 5, 2, and 3) is determined (step 110), and if it is, it is determined that the code input is correct and a command is issued to release the door lock (step 111). ). In response to this command, the output port 6 outputs an output, which makes the transistor 15 conductive through the buffer 14 to excite the relay 16, and by switching its contacts, the actuator 13 is driven and the door lock is released. This allows the door to be opened by operating the door handle 18. On the other hand, steps 107, 109,
If any of 110 is judged as incorrect, buzzer 10
will sound three times (step 112) and return to standby mode.
Here, the door handle retraction detection switch 2 and the door handle 18 constitute a code input means, and the buffer 14, the transistor 15, the relay 16, and the door lock driving actuator 13 detect the door lock, which is a load, based on the output from the output port 6. It constitutes a driving means for driving the device. Further, in this embodiment, the functions of the measuring means, threshold value setting means, comparing means, input signal dividing means, and input signal determining means are performed by the control unit 4.
The system is provided in terms of software as shown in the specific flowcharts of FIGS. 5A, B, and C.

Next, a specific example of the flowchart in Figure 3 is shown in Figure 5.
It is shown and explained in Figures A, B, and C.

In FIGS. 5A, B, and C, first, the door lock state is determined, and if the door is locked, a counter C1 is used to count the door handle pull time to signal the start of input, and a counter C1 is used to count the door handle pull time to signal the end of input. The counter C2 and the counter L for measuring the interval of code input from the door handle are set to 0, and the counter I for measuring the number of code input signals is initialized to 1, and the system enters a standby state (step 201,
202). In this state, it is determined whether the door handle is pulled or not, and if it is pulled, the time is measured by the count number of C1, and if C1 is greater than or equal to CM1 (equivalent to 3 seconds), the buzzer sounds once to start inputting. Give a signal (steps 203-206). Next, it is determined whether the door handle has been returned, and if the door handle has been returned, the code input is started (step 207).

Then, when the door handle is pulled again, it becomes L.
Counting of C2 is started, and during this counting (while the door handle is being pulled) it is compared with the count number CM2 corresponding to 3 seconds, and it is determined whether or not it is a signal for the end of input (steps 208 to 212). If the door handle pull time is within 3 seconds, C2 is cleared to 0, while L continues to count, and the next time the door handle is pulled again, the content of L will be M(I) representing the cipher input signal interval. ) is cleared and I is counted by 1. From then on, this is repeated to determine the interval time L between inputs from the door handle.
are sequentially stored in M(I) (I=0 to 8) (steps 213 to 218). After that, when a signal that makes C2 equal to or higher than CM2 is input, it is regarded as the end of the code input, the buzzer sounds twice to signal the end of the input, and the previous input signal is regarded as the code input signal and the process moves to the next verification process. (steps 219, 220). Here, the steps 209, 214 to 218 are the portions corresponding to the function as a measuring means.

In the encryption input signal matching process, first, the number I of encryption input signals is set to a predetermined number IM (5+2+3=10).
If it is correct, one of the next cipher input intervals M(I) is set as its minimum value MIN, and the difference from the other M(I) is sequentially calculated to determine the cipher input interval M. Find the minimum value MIN of (I) (step 221
~227). Next, let the number of blocks of the input signal be J, the input signal within the same block be K, and J=0, I=0,
An initial value of K=1 is set (steps 228-230).
Then, it is determined whether or not all cipher input intervals M(I) are larger than twice the minimum value (2MIN), and if 2MIN≧M(I), the input signals are considered to be in the same block, and K is set to 1. Count, 2MIN<
If M(I), consider it as another block and set J to 1.
At the same time as counting, the counted number of K during that time is replaced with PN (J) indicating the number of input signals in the block, and the input signal is divided into blocks (steps 231 to 231).
237).

When this blocking is completed, it is determined whether the number of blocks J matches a predetermined value JM (3 in this case) (steps 238 to 240). If they match, then calculate the predetermined value PNM (J) (J = 1, 2, 3) for each PN (J) (J = 1, 2, 3).
PNM(1)=5, PNM(2)=2, PNM(3)=3) is determined (steps 241 to 243). Then, when all PNM(J) are equal, it is determined that the code input is correct and the door lock is released (step 244). In addition, each step 222 mentioned above,
If it is determined that the value differs from the predetermined value in either 240 or 241, the buzzer sounds three times to notify the error in the code input and returns to the initial state (step 245). Here, the steps 223 to 227 correspond to the function of the threshold value setting means, the steps 231 to 234 correspond to the function of the comparison means, and the steps 235 to 239 correspond to the function of the input signal dividing means. This is the part corresponding to step 240~
244 is a portion corresponding to the function of the input signal determining means.

With such a door lock release device, the user can unlock the door by simply pulling back the door handle, and even a handicapped person with a hand disability can easily unlock the door. In addition, the code input speed, which differs depending on the user, does not matter; it is sufficient that each digit of the code number is separated by time, so it is possible to input signals at any speed according to the user's skill level, making it easy to use. is extremely good. Furthermore, it is convenient because a buzzer sounds to notify you of the start and end of the code input and of input errors.

As described above, according to the present invention, a code is input using one input means, and the input signal is divided into blocks based on the time interval between the input signals, and the number of blocks and the input signal in each block are divided into blocks. The input code is a number, and a predetermined load is driven when the code is equal to a predetermined code, so even a handicapped person with a hand disability can easily operate it, and the input speed can be adjusted to any input speed depending on the user's skill level. It has the effect of being extremely easy to use.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention;
FIG. 2 is a perspective view showing the main part of the same embodiment as above;
FIG. 3 is a flowchart showing the control system of the present invention, FIG. 4 is an input time chart of the control unit, FIGS. 5A, B, and C are specific flowcharts of the same embodiment, and FIG. 6 is a conventional device. FIG. 7 is a block diagram illustrating the configuration of the present invention. 1...Door lock detection switch, 2...Door handle pullback detection switch (cipher input means),
4... Control unit (measuring means, threshold setting means, comparison means, input signal dividing means, input signal determining means), 5... Input port, 6... Output port, 7... CPU, 8... ROM, 9 ……RAM,
10... Buzzer, 13... Door lock drive actuator (driving means), 14... Buffer (driving means), 15... Transistor (driving means), 1
6... Relay (driving means), 18... Door handle (cipher input means).

Claims (1)

[Claims] 1. A code input means for inputting a code by a series of on/off operations, a measuring means for measuring the time interval between each input signal inputted from the code input means, and each measurement value signal from the measuring means. a threshold value setting means for setting a threshold value based on the threshold value, and determining whether or not the measured value is within the threshold value by sequentially comparing the threshold value signal from the threshold value setting means and the measured value signal between each input signal from the measuring means. Comparing means for outputting a signal, and when the measured value is within a threshold value based on the determination signal from the comparing means, the adjacent input signal is determined to be an input signal in the same block, and when the measured value exceeds the threshold value is an input signal dividing means that determines that adjacent input signals are input signals of different blocks and divides the input signal into blocks, and input cryptographic information consisting of the number of blocks output from the dividing means and the number of input signals in each block. and an input signal determining means for outputting an input signal when the input signal is compared with predetermined cryptographic information and determined to be a match, and a driving means for driving a predetermined load based on the output from the determining means. Characteristic code input type load drive device.