JP3632187B2 - Electric shutter wireless signal control mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless control mechanism for an electric shutter that controls opening and closing of the electric shutter using a wireless signal, and more particularly to a wireless control mechanism for the electric shutter provided with an obstacle detection device.
[0002]
[Prior art]
Conventionally, when an electric shutter equipped with an obstacle detection device is installed close to each other, or the remote control switch and the obstacle detection device are electrically operated as disclosed in Japanese Patent Application Laid-Open No. 8-240086 and No. 8-3673. Some systems used together with shutters use radio waves, infrared rays, or the like for both obstacle detection devices or remote control switches and obstacle detection devices.
[0003]
[Problems to be solved by the invention]
However, even if the transmission code of the mutual radio signal is changed, the harmful effects caused by the interference of both radio signals when receiving simultaneously with any shutter receiver cannot be completely eliminated. When the original function of the object detection device is impaired, resulting in a malfunction in the receiver, or sometimes the receiver incorrectly determines that the received code is different, or determines that there is no battery despite the presence of a battery Also occurred. In particular, when an electric shutter with an obstacle detection device is additionally provided, radio signals in a common format are often transmitted, so the above-described adverse effects may inevitably occur, but in order to overcome the above-described problems due to simultaneous reception. The response of was not enough.
[0004]
[Means for Solving the Problems]
The main object of the present invention is to fundamentally solve the problems that inevitably occur when such an electric shutter transmits an obstacle detection signal wirelessly and simultaneously receives wireless signals from other devices. An electric shutter configured to receive a transmission signal from a transmitter associated with the detection of an obstacle detection sensor of an obstacle detection device provided at the lower end of the shutter curtain and to perform an emergency retreat operation by a receiver provided on the housing side In the transmitter, the transmitter is provided with generating means capable of generating a plurality of mutually different patterns of transmission signals by the selecting means, and the pattern is an intermittent waveform for transmitting and pausing at least two unit-length transmission words. Regardless of which pattern transmission signal is selected, any transmission word of the transmission signal of the other party's transmission signal will be transmitted when the transmission signals interfere with each other. A unit length of the transmission word the receiver can read it in hibernation is a transmission signal of the selected pattern so as to emerge configuration,
Furthermore, transmission order information is previously captured in each word of the transmission signal of the pattern, and there is a delay from the time of reception of the first word of the transmission word to the time of word reception in the non-interference area when the transmission signals interfere with each other. The time is defined as the shutter reversal rise time after contact with the obstacle . This makes it possible for an electric shutter having the same type of obstacle detection device, etc., adjacent to each other to reliably take in a predetermined signal without causing reception failure at the receiver even if transmission radio signals interfere with each other. Even when the obstacle detection device is activated during wireless transmission by the remote control switch, the obstacle detection signal can be discriminated and received without any problem.
[0005]
Next, an embodiment of the present invention will be described based on the drawings in the case where the radio signal is a radio wave. 1 and 2, reference numeral 1 denotes a plurality of electric shutters A and B arranged side by side, 2 denotes a shutter curtain, 3 denotes a seat plate provided at the lower end of the shutter curtain 2, 4 denotes a shutter case for housing the shutter curtain 2, 5 Is a guide rail erected on both sides of the opening of the building, 6 is an opening / closing machine, 7 is a transmitter, and includes a transmission control unit 7a and a transmission unit 7b. The transmission control unit 7a is operated and controlled by a microcomputer described later. In addition, a generating means 7c for outputting a waveform signal having a pattern based on the format is incorporated. Reference numeral 8 denotes a receiver, which includes a reception unit 8a and a reception control unit 8b. Reference numeral 9 denotes an open / close control unit, 10 denotes an obstacle detection sensor, 20 denotes a push button switch for opening / closing a normal shutter, 30 denotes a remote control switch, 100 Is a case for housing a member device such as the transmission control unit 7a. The case 51 is provided with a battery lid 52. The battery lid 52 has a battery 53 and a pattern of a transmission signal to be described later. The selection means 54, which is a changeover switch, is accommodated, and when the battery cover 52 is opened, the storage part of the battery 53 can be seen and the pattern can be appropriately switched by the selection means 54 according to the situation. It has become.
[0006]
The case 51 is fixed to the seat plate 3, and an obstacle detection sensor 10 is provided on the lower surface of the seat plate 3. The obstacle detection sensor 10 protrudes to both sides of the seat plate 3 and extends to the lower surface of the projecting portion 11 built in the guide rail 5, and the guide rail as well as the lower side of the shutter curtain 2. Obstacles in the guide groove 5 can also be detected.
[0007]
The obstacle detection sensor 10 and the transmission control unit 7a and the transmission control unit 7a and the transmission unit 7b are connected. When the obstacle detection sensor 10 detects an obstacle, a micro switch (not shown) is activated to detect the obstacle. Is closed and a detection signal is transmitted to the transmission controller 7a. In response to this transmission signal, the transmission control unit 7a modulates and outputs the signal of the pattern selected by the generation means 7c, and transmits the signal from the transmission unit 7b to the reception unit 8a.
[0008]
The receiving unit 8a is attached to the lower surface of the shutter case 4. The receiving unit 8a receives a signal from the transmitting unit 7b provided on the seat plate 3, and the shutter control of the opening / closing control unit 9 from the reception control unit 8b is performed. The command signal is output. Further, since the signal receiving area is set wide, not only signals from below but also signals from each direction such as the front of the opening can be received.
[0009]
Therefore, the receiving unit 8a of the electric shutter A (or the receiving unit 8a of the electric shutter B) also receives a radio signal from the remote control switch 41 that performs remote control and an obstacle detection radio signal from the electric shutter B (or electric shutter A). It can be received simultaneously.
[0010]
Next, a patterned transmission signal transmitted from the transmission unit 7a to the reception unit 8a will be described. FIG. 3 shows the format of the transmission code of the transmission signal. This format is composed of a header, a data code consisting of a key code and a function code, a checksum, and a stop bit, and this format is one word of unit length. The transmission unit 8a has a pattern in which a signal of this format is transmitted several words at a time, intermittently with a certain pause period. Also, the key code of the data code is the identification code (ID code) of the sender, but when it interferes with other radio waves of the same format, when one word of the format to be received is read The reception control unit 8b recognizes that one word including the identification code is a unique code signal that enables control such as shutter stoppage. In this case, whether or not one word can be read is controlled by the microcomputer, and when a signal of another pattern (not selected) is simultaneously received while reading one word, the radio wave is in an interference state. Therefore, the word cannot be completely read. The function code is a sequence of 8 bits, and the meaning is a signal from the transmitter of pattern (2), which word signal is the signal from the transmitter of pattern (1). Or a battery exhaustion signal.
[0011]
Therefore, in the embodiment of the present invention, even when the obstacle detection signals in the adjacent electric shutters A and B are simultaneously received from each other, in order to prevent the malfunction due to mutual interference, it is illustrated in FIG. Thus, two types of patterns are used. (A) of a figure is pattern (1) and (b) of a figure is pattern (2). The pattern {circle around (1)} is transmitted continuously for 4 words when the micro switch of the obstacle detection sensor 10 is actuated, and then the pattern can be repeatedly repeated after resting for 4 words. Similarly, the pattern (2) is transmitted continuously for two words when the micro switch of the obstacle detection sensor 10 is operated, and then the pattern is repeated after three words are paused. These patterns are output via a microcomputer incorporated in the transmission control unit 7a. When the electric shutter A selects the pattern (1), the electric shutter B selects the pattern (2), and the selection means 54 determines which one is selected.
[0012]
Regardless of the transmission signal of any pattern between the intermittent transmission signals of the patterns (1) and (2), which are different patterns, the transmission word of the transmission signal of the other party transmission signal can be detected when the transmission signals interfere with each other. FIG. 5 shows a specific example of the relationship in which a unit-length transmission word that can be read as a transmission signal having a pattern selected by the receiver during any transmission suspension is generated. (A) of the figure shows that the detection shutter 12 is in contact with an obstacle while the electric shutter A is closed, and the electric shutter B completes the closing immediately after the transmission of the intermittent transmission signal of the pattern (1) is started. It is assumed that the detection sensor 10 starts transmission of an intermittent transmission signal as a shutter stop command and the receiving unit 8a of the electric shutter A has received both transmission signals.
[0013]
At the transmission timing of both transmission signals, if attention is paid to the electric shutter A, the first word of the pattern (2) is received by the receiving unit a during the transmission of the first word of the pattern (1). This is a state where interference occurs. Even during the transmission of the second and third words of pattern (1), an interference state continues to occur. In such an interference state, the reception control unit 8b cannot determine that both signals transmitted from the reception unit 8a are of the pattern (1). However, the transmission signal of the fourth word of the pattern (1) can be read because the transmission of the pattern (2) has been suspended before that. Therefore, the fourth word can be received (circle mark in FIG. 4).
[0014]
On the other hand, (b) in the figure is a case where attention is paid to the electric shutter B, and immediately after the detection sensor 12 comes into contact with an obstacle while the electric shutter B is closed and the transmission of the intermittent transmission signal of the pattern (2) is started. When the electric shutter A completes closing and comes into contact with the floor surface 100, the detection sensor 10 starts transmission of an intermittent transmission signal as a shutter stop command, and the reception unit 8a of the electric shutter B receives both transmission signals. It is assumed. Considering the same as in the case of the electric shutter A described above, the receiving unit 8a can start receiving at the sixth word as shown in FIG.
[0015]
Here, even if the unit length word of the pattern not selected is received in the non-interference state, the reception control unit 8b has a unique key code that cannot be read (it becomes a unique key code of pattern (2)). Therefore, the shutter is not controlled by this.
[0016]
As described above, by making it possible to select a plurality of patterned intermittent transmission signals by the selection means 54 as described above, an electric shutter equipped with a radio wave type obstacle detection device is provided as an additional embodiment. Control the shutter with the remote control switch 30 when the device detects a floor or an obstacle and transmits an intermittent transmission signal, or while the electric shutter detects an obstacle and intermittently transmits radio waves Even if a radio wave is transmitted, if one selects the signal of pattern (1) and the other selects the signal of pattern (2), even if there is a radio wave interference area, A transmission signal having a unit length of one word can be reliably received at any timing. In short, in the present invention, when another radio signal is received as a radio signal that should be received and an interference state occurs between the two signals, transmission and transmission stoppage that occur between waveforms of different patterns between both intermittent signals. Due to this deviation, a unique word in the non-interference area is read and output, and control such as shutter stop is performed. It goes without saying that infrared rays or the like may be used in place of the radio signal of this embodiment. Alternatively, the pattern selection means 54 may be eliminated, and transmitters of different patterns may be used for the electric shutters A and B as the transmitters of the patterns (1) and (2).
[0017]
The operation of the embodiment of the present invention configured as described will be described.
As shown in the flowchart of FIG. 6, the operation of the obstacle detection switch 10 provided on the seat plate in contact with the obstacle while the electric shutter A (pattern (1) is selected) is lowered. When the intermittent transmission signal of pattern (1) is transmitted from the transmission unit 7a, this signal is received by the reception unit 8a. At this time, the reception control unit 8b determines whether another radio wave is received by the reception unit 8a. When there is no other radio wave, a command to stop the shutter is transmitted to the shutter control unit 9 based on the intermittent transmission signal of pattern (1), and the descent of the shutter is stopped and the inversion is raised for a predetermined time to stop. . Even when other radio waves are being received simultaneously, intermittent transmission of pattern (1) can be performed when one word including the identification symbol of pattern (1) can be taken into the intermittent transmission signal of pattern (1). A command to stop the shutter based on the signal is transmitted to the shutter control unit 9 to stop the lowering of the shutter once and to reverse and raise it for a predetermined time.
[0018]
On the other hand, when there is no obstacle while the electric shutter A is being lowered, the shutter is similarly stopped by the operation of the obstacle detection switch 10 in contact with the floor surface 100. If the word that can be captured at this time is the first or second word after transmission, the shutter is merely stopped, but if the word is the third or subsequent word after transmission, the shutter is temporarily stopped. After stopping, it is reversed and raised for a predetermined time to stop, and the slack of the shutter curtain 2 is corrected by the delay time.
[0019]
Further, in the present invention, even when intermittent transmission signals having different patterns are received simultaneously, information indicating which word each of the patterned transmission signals is captured in advance. Even if a signal of several words delayed by reception is received, the delay time is controlled so that the inversion rising time of the shutter after contacting the obstacle can be obtained. Accordingly, the shutter can be reversed and raised by the amount that the shutter has pushed the obstacle too much.
[0020]
Even in the method of selecting a plurality of patterned signals as in the present invention, reception is improved by increasing the transmission output of only the first word and eliminating unwanted spurious signals coming from other sources. You can also increase your ability.
[Brief description of the drawings]
FIG. 1 is an external view of electric shutters A and B provided side by side.
FIG. 2 is a front view of a transmitter.
FIG. 3 is a format of a transmission code.
FIG. 4A shows a waveform of pattern (1).
(B) Waveform of pattern (2).
FIG. 5A is an interference state diagram with pattern (2) when pattern (1) is selected.
(B) It is an interference state figure with pattern (1) at the time of selecting pattern (2).
FIG. 6 is a flowchart.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric shutter 2 Shutter curtain 3 Seat plate 4 Shutter case 5 Guide rail 6 Opening / closing machine 7 Transmitter 7a Transmitting control part 7b Transmitting part 8 Receiver 8a Receiving part 8b Reception control part 9 Opening / closing control part 10 Obstacle Detection sensor 11 protrusion 20 push button switch 30 remote control switch 51 case 52 battery lid 53 battery 54 selection means 100 floor surface

Claims (1)

In an electric shutter configured to receive a transmission signal from a transmitter associated with detection by an obstacle detection sensor of an obstacle detection device provided at the lower end of a shutter curtain and receive an emergency evacuation operation by a receiver provided on a housing side The transmitter is provided with generating means capable of generating a plurality of mutually different patterns of transmission signals by the selecting means, and the pattern is an intermittent waveform for transmitting and pausing at least two unit lengths of transmission words. Regardless of the transmission signal of which pattern is selected, the receiver reads that the transmission signal has the pattern selected during the suspension of transmission of one of the transmission words of the other party transmission signal when the transmission signals interfere with each other. it is configured to transmit word unit length may have spawn further transmitted to each word of the transmission signal of the pattern Information is captured in advance, and shutter reversal after contact with an obstacle is made for the lag time from the reception of the first word of the transmission word to the reception of the word in the non-interference area when the transmission signals interfere with each other A wireless signal control mechanism for an electric shutter, characterized by a rising time .

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