JPS6171797A - Radio controller - Google Patents

Abstract

PURPOSE:To coexist a reduction in power consumption and accuracy of an action by executing a detection that there is a signal or not and a code transmission by a transmitting and receiving part with two stage. CONSTITUTION:A key switch 2 for selecting control contents is provided for a transmitter 1. When the key switch 2 is depressed, the 1st oscillation part 4 where the code corresponding to the control content is generated by a code generation part 3 comes to be operable, and issues a relatively large output. The the 2nd oscillation part 5 oscillates, and transmits the signal modulated by the code from the code generation part 3. A receiver 6 has the 1st reception part 7, which acts at the time of waiting a signal. When the 1st reception part 7 detects a signal, the 2nd reception part 8 and a code decoding part 9 are brought to the operable state. The 2nd reception part 8 receives the signal from the 2nd oscillation part 5, and transmits the demodulated signal to the code decoding part 9. The effectiveness of the code is judged in the part 9, the 1st and 2nd drive part 10 or 11 is operated in accordance with the control content, and controls an external device is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a device for remotely controlling doors of automobiles and houses.

[Conventional technology]

Conventionally, devices for opening and closing automobile doors using wireless communication have been developed and commercially available. In this system, an identification code is emitted from a transmitter, and the receiver opens and closes the door only when the identification codes match while the receiver is always in a receiving state.

[Problem that the invention seeks to solve]

However, with conventional devices, the receiver side is always in the receiving state, so it consumes a lot of power during standby, so it cannot be used if there is not enough power in the original battery. Due to the increased sensitivity of the machine, special noise processing was required, and power consumption became a problem.

On the other hand, the transmitter side is usually carried, but due to its miniaturization, it is not possible to use a large-capacity, high-output 11t source, so it is necessary to reduce power consumption as much as possible, and it is necessary to extend the life of the four batteries as much as possible. I have high hopes.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a wireless/wireless device that operates reliably and consumes less power in a standby state.

[Means for solving problems]

In the present invention, two stages of transmission or transmission/reception are used, and in the standby reception state, the simple operation of detecting the presence or absence of a signal is performed, and after detecting the signal from the transmitter, the highly sensitive receiving section put it into operation. In addition, the transmitting side emits a high-output signal at the beginning of transmission, and after the high-sensitivity receiving section on the receiver side starts operating, it sends out a code for device identification and a first code on the device side, ensuring reliable reception. We aimed to balance power with low consumption and low consumption.

[For 1 unit] If you use the above configuration, you can easily receive 1 unit at the time of standby reception! A can be made to have low power consumption, and a relatively low frequency O suitable for reducing power consumption can be used for noise reduction. In this case, even if the circuit is sensitive to noise, it will not malfunction due to noise processing and identification code detection in the high-sensitivity receiving section, which will be discussed next.

Historically, the time for the transmitting side to generate a large output is extremely short, and since the receiving side synchronizes with the sound at the time of this large output, it is possible to reduce the overall power consumption and at the same time realize reliable operation.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The transmitter 1 is provided with a key switch 2 for selecting all control contents, and when the key switch 2 is turned on, a code corresponding to the control contents is generated in the code generator 5, and the first oscillator 4 is first activated. It enters the operating state and emits a relatively large output. The second receiving station 8 detects the signal from the code generator 3 and transmits all the modulated signals. Note that the code generator 3 is the first source generator 4.
The second excavation section 5 is also conducting a control operation every evening.

The receiver 6 includes a first receiving section 7, which is always in operation when waiting for a signal. When the first receiving section 7 detects the signal, the second receiving section 8. The code decoder 9 is brought into operation. Second receiving section 8
receives the signal from the second oscillator 5 and sends the demodulated code to the code decoder 9.

The code decoding unit 9 determines the validity of the code, operates the first ringer 10 or the second drive unit 11 depending on the control content, and outputs an external F! Controls equipment A.

The operation will be explained in detail. Let us consider the situation of remote control of automobiles. It is assumed that the key switch 2 has two buttons: "open/close door" and "start engine". The code generator 5 generates a signal of ``0'' or ``1'' depending on which button of the key switch 2 is pressed, and also generates a code for identifying the device. The device identification code may consist of only a unique code for identifying each device, but an appropriate pattern code may be added to make it easier to distinguish it from noise and to synchronize the code string. The power is amazing. An example of this code is shown in FIG. First, a synchronization signal S is sent out, followed by a device-specific code S.
2, a code S3 indicating the control content is sent out most importantly.

It is also conceivable that this code string is repeatedly generated as necessary.

This code is provided in a read-only memory (semi-solid memory element or selective disconnection of memory wiring). The code generator 6 reads out the code and also generates operation control signals for the first oscillator 4 and the second oscillator 5. These signals can be generated by random logic by combining clip-flop circuits and gate circuits, and can be controlled by a microprocessor if necessary.

In order to operate the first oscillator 4, a transistor switch that operates based on the signal from the code generator 5 is prepared, and the oscillation circuit '1! This is done by turning on the L source and controlling the bias of the oscillation circuit.

Note that, since the first oscillation section 4 generates a relatively large output, it is necessary to supply a larger current than the electric wire. However, due to the portability of the transmitter 1, a battery that can accommodate a large current cannot be used in the above-mentioned method. Therefore, the idea is to use a battery to photoelectrically charge the capacitor and then use the energy stored in the capacitor to generate a large output. These controls are also implemented using transistor switches.

The signal generated by the first oscillator 4 does not have to have the same frequency as the signal from the second excavated city 5, and depending on the historical environment, ultrasonic waves, medium waves, long waves, short waves, etc. may be used. It is possible that The first oscillator 4 does not require modulation and does not require much frequency stability, so it can be easily realized.

On the other hand, since the second excavated capital 5 must transmit codes accurately, it requires low-cost operation, but it is not compatible with general FM
A signal generation circuit can be used.

It is also possible to use an AM signal, but in this case it is desirable to perform noise processing using the f:signal rule.

The first receiving section 7 detects only the presence or absence of a signal from the first oscillating section 4, and uses an antenna/tuner (or ultrasonic microphone).
It consists of an amplifier, a detector, and a switch puffer circuit.

These circuits are very easy to make, and low power consumption is also possible. When the I57 detects a signal at a certain level, it operates the main receiving section, the skin 2 receiving section 8, and the code decoding section 9, which judges whether the received signal is not noise but a valid signal for the device. let Further, even if the first receiving section 7 malfunctions due to noise or the like, the selection ability of the second receiving section 8 and code decoding section 9 prevents the final malfunction from occurring.

The second receiver 8 is required to have high sensitivity and low noise, such as a pulse noise removal circuit, a circuit that waits for selectivity 2 by depending on the clock cycle of the transmitted code string, and a noise reduction circuit that uses code redundancy. Add a removal circuit as necessary.

The code decoder 9 detects a match between the identification codes, and if they match, it also decodes the control contents. If the identification codes do not match, the decoding operation is continued for a certain period of time, and if a valid signal is still not detected, the operations of the second receiving station 8 and the code decoding section 9 are stopped.

The code decoding section 9 of the platform whose control content was "opening/closing the door" fully operates the first drive section 10 and sends power to the door opening/closing device. In addition, in the case of "starting the engine", the code decoding section 9 uses the second. The moving part 11 is operated to activate the engine/engine starting device 4.

The 51st line (1) is a diagram showing the above operation timing.

Is waveform A the state of key switch 2? Waveform B shows the entire operating width of the first oscillator 4, waveform C shows the entire operating width of the second oscillator 5, the waveform shows the entire operating width of the first oscillator 7, and the waveform E shows the entire operating width of the second oscillator 8.
When key switch 2 is pressed, the first
The oscillator 4 operates.

The first receiving unit 7 normally operates all the time, and stops after a while after receiving the signal from the first oscillating unit 4 and operating the second receiving unit f15. After the stop of step 4, the operation starts after a while.At this time, the receiving section 8 is already in operation and the transmission of the code is carried out. It is a flock diagram of a seashore. The key switch 2 and code generator 3 are the same as in the Pava 1 diagram. The oscillation section 12 generates a signal modulated by the code from the code generation section 6, but it is possible to change the output strength by applying another signal from the code generation section 3.

In addition, it includes a start signal that indicates the start of the identification code at the time of high output.
It is also possible to do so. The operation is shown in Fig. 5. The waveform shows the state of the key switch 2, and the waveform F shows the state of the key switch 2.
2 operating state. When the key switch 2 is pressed, the oscillation section 12 emits a high output signal, and then switches to a low output signal.

The output is switched by the oscillation circuit inside the oscillation lever 12! This can also be done by switching the voltage, but the bias 2 switching method is advantageous in terms of power utilization.

FIG. 6 is a timing diagram showing another embodiment of the present invention. If the key switch 2 is pressed continuously within a certain period of time, the key switch 2 is designed not to generate a large output signal for the second and subsequent key presses. Waveform G shows the state of the key switch 2, waveform H shows the operation of the first oscillator 4, waveform shows the operation of the second oscillator 5, and waveform J shows the operation of the second receiver 8.

Since the interval between the fifth and sixth keystrokes is long and the other intervals are short, the first oscillation unit 4 operates only for the first and sixth keystrokes. On the other hand, the edict 2 oscillator 5 sends a signal containing the code string shown in FIG. 2 for each power input. In addition, the second receiver 8 operates from the first key press to the fifth key press, and then stops once, but returns to the operating state due to the high output signal issued when the sixth key press is applied. Become. This simple configuration is advantageous in reducing the power consumption of the transmitter for applications where key manual input is likely to be performed continuously, and can be realized simply by adding a timer circuit and a simple control circuit.

〔Effect of the invention〕

As explained above, this invention detects the presence or absence of a signal and transmits a code using a two-stage transmitting/receiving section, so it is possible to achieve both low power consumption and reliable operation, and to improve battery life characteristics. It has the effect of improving and allowing complete control from a distance.

In addition, in the example, we only talked about wireless "control" of own kh car, but L3T can also be applied to other electrical products and houses.
It is Noh.

[Brief explanation of the drawing]

F, 11gl is a block diagram showing one embodiment of the present invention, FIG. 2 is a code waveform diagram related to the present invention, FIG. Flow diagram and timing diagram showing another embodiment of the invention. FIG. 6 is a timing diagram showing another embodiment 2 of the invention. 1...Transmitter 2...Key switch 3
...Sign generation f15 4...First oscillation section 5
...Second excavation section 6...Receiver 7...Small 1 receiving section 8...Second receiving section 9...Symbol M grinding section 10...First drive section 11...Second Drive section 12... Oscillation section and above Applicant: Seiko Electronic Industries Co., Ltd. - Figure! Transmitter t〈Sei 3 Bottom 9 (J 2 Figure 3 Figure 4 Figure 125 Figure 6

Claims (3)

[Claims] (1) In a wireless control device consisting of a portable transmitter that issues control commands by radio, and a receiver that receives the signal from this transmitter, decodes the identification signal contained in this signal, and responds only to valid commands, the above-mentioned A wireless control device characterized in that a transmitter emits a relatively strong signal at the start of control, and then switches to emit a relatively weak signal. (2) A first receiving section and a second receiving section are provided, the first receiving section receives a relatively strong signal sent from the transmitter, and the second receiving section receives a relatively strong signal sent from the transmitter.
2. The wireless control device according to claim 1, wherein the receiving section of the wireless control device is activated. (3) The radio control device according to claims 1 and 2, characterized in that a relatively strong transmission is performed when a start signal indicating the start of the identification signal transmitted from the transmitter is generated.