JP3746267B2 - Electronic control device operated by wireless device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic control device, and more particularly, to an electronic control device for an automobile in which a sleep state and an operation state are switched.
[0002]
[Prior art]
FIG. 2 is a configuration diagram of a conventional apparatus. Reference numeral 50 denotes an electronic control device. Reference numeral 54 denotes an antenna that receives radio waves output from a transmitter (not shown in the figure) and transmits a signal to the tuner. The tuner modulates the signal, converts it to a digital signal, and transmits the signal to an MPU (microprocessor). Reference numeral 56 denotes an MPU which determines a signal from the tuner and controls the trunk lid opener motor 60 and the like.
[0003]
58 is a low-frequency oscillation circuit, and 59 is a high-frequency oscillation circuit. In normal operation, the MPU operates with the clock of the 59 oscillation circuit in order to perform arithmetic processing at high speed. However, the MPU operates with the clock of the 58 oscillation circuit having a low frequency in order to suppress current consumption during sleep. 62 and 63 are control signals for stopping the oscillation circuits 58 and 59, respectively. In this example, the MPU operates at a low speed even during sleep and constantly monitors the tuner signal.
[0004]
In another apparatus as shown in FIG. 3, the tuner signal is processed by a processing circuit 65 separate from the MPU, and the MPU wakeup signal and a control signal are input to the MPU.
[0005]
[Problems to be solved by the invention]
In a control unit that performs control by receiving radio waves as in the prior art described above, since all radio waves exist in the air, the output of the tuner generates a signal without receiving regular radio waves. Therefore, during sleep, the tuner power supply is intermittently supplied by the intermittent power supply 53 shown in FIGS. 2 and 3 to reduce the current consumed by the tuner, and the output signal from the tuner is normal so as not to wake up due to noise. In the example of FIG. 2, the MPU clock is shifted to the normal operation in the example of FIG. 2 when judging whether only the first part of the entire signal within a time shorter than the intermittent time is normal. And intermittent power is always supplied. In the example of FIG. 3, when the processing circuit determines that the tuner signal is normal, the MPU starts operation, performs normal processing, and constantly supplies intermittent power. In FIG. 4, it is determined that the tuner signal is not normal, so that the normal operation is not performed. However, when the signal as shown in FIG. 5 is input, the MPU is normally operated when the first pulse is normally input. In addition, power to the tuner is always supplied. In this way, current consumption is reduced. However, in either example, in order to determine whether the tuner signal is normal, the MPU oscillation circuit is necessary in the example of FIG. 2, the oscillation circuit of the processing circuit is necessary in the example of FIG. Thus, even if there is no need to cause a noise waveform thereafter, once it is determined to be normal, normal control is performed, and therefore it is not possible to sleep unless a procedure for sleeping again is performed. Therefore, in the conventional device, the low-frequency oscillation circuit is operating even during sleep, and the entire system operates normally even when it is not necessary to wake up, so that the current consumption cannot be sufficiently reduced.
[0006]
Further, in the multiplex communication system as shown in FIG. 6, other control units are also shifted to normal operation. In order to return to the sleep state, a sleep command is issued to the other control units, and the other control units are Since the transition to the sleep state can be made only after the sleep, the time during which the current flows is longer than that in the conventional example, and the current consumption increases. In particular, in the case of an automobile or the like, if there is a large amount of current consumption, the battery voltage decreases, which causes a major problem that the engine cannot be started.
[0007]
The problem of the prior art is to sufficiently suppress the current consumption even in a use environment with a large amount of noise.
[0008]
[Means for Solving the Problems]
  When the electronic control device operated by the wireless device in the present invention receives a wireless signal and a microcomputer that executes a communication control program for performing data communication with another control device connected by a communication line, A receiver for sending a reception signal to the microcomputer, and when the microcomputer receives a signal from the receiver during standby in the sleep mode, the microcomputer cancels the sleep mode and transmits the signal in a known transmission state. When the received signal judgment program that judges whether the control signal is normal or noise from the machine is executed and it is judged as noise, it shifts to the standby state in the sleep mode again and is judged as a normal control signal Executes the communication control program and connects the communication line to the other control device connected by the communication line.ThroughThen, it is operated by a wireless device that transmits a wakeup request signal.
[0009]
  Further, in the electronic control device operated by the wireless device according to the present invention, preferably, the reception determination program determines whether the signal from the receiver is a normal control signal from a known transmitter or noise. This is done by continuous verification.
  Furthermore, the electronic control device operated by the wireless device according to the present invention is preferably configured such that when the two-way verification receives a signal from the receiver, a change in the signal from the receiver is determined after a predetermined delay time has elapsed. When there is no signal change, it is determined that the signal is a normal control signal from a known transmitter, and when there is a signal change, it is determined that the signal is noise.
  Furthermore, in the electronic control device operated by the wireless device according to the present invention, preferably, the predetermined delay time of the two-way collation is longer than the pulse width of the high frequency noise to be removed.
  Furthermore, the electronic control device operated by the wireless device according to the present invention is preferably a key insertion detection device that detects whether or not a key is inserted in a key switch, and a door that detects whether or not the door is closed. A closed state detection device, and an input / output interface to which the receiver is connected; and signals from the receiver, the key insertion detection device, and the door closed state detection device that are captured via the input / output interface. It is input to the microcomputer and it is determined whether the received signal is a received signal input from the receiver.
  Further, in the electronic control device operated by the wireless device in the present invention, preferably, the other control device connected by the communication line is a trunk opener actuator for opening the trunk.
  Further, the electronic control device operated by the wireless device according to the present invention preferably receives power supply directly from the battery without using a key switch connected to the battery.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 6 is an overall configuration diagram. 1 is a central processing unit CCU, and 3 to 5 are terminal processing units. Each device is connected by a multiplex communication line 7. Input information of switches connected to each device and output information of actuators such as lamps and motors are exchanged by multiplex communication to perform overall control. ing. FIG. 1 shows the configuration of the central processing unit 1. Reference numeral 31 denotes a battery that supplies power to the central processing unit and also supplies power to the entire vehicle such as the terminal processing units 3, 4, and 5 in FIG. 30 is a constant voltage power supply circuit
Power is supplied to the MPU 11, the communication IC 12, and the like. 32 is a second power supply circuit (1) for switching whether or not to supply the battery voltage to the downstream circuit by a signal from the MPU, and 33 is to supply the output of the constant voltage power supply circuit to the downstream circuit, A second power supply circuit (2) that switches whether or not to do so by a signal from the MPU. Reference numeral 35 denotes switches connected to the central processing unit, and the pull-up resistor 34 is supplied with power from the second power supply circuit (1) or (2). Reference numeral 36 denotes wake-up switches connected to the central processing unit, and a pull-up resistor 34 supplies power from the battery or the power supply circuit 30. These switch signals are connected to the input ports of the MPU and are read for control. Reference numeral 37 denotes an antenna for keyless entry. A signal from the antenna 37 is input to the tuner 38, and a signal demodulated by the tuner 38 is input to the MPU 11. Reference numeral 39 denotes a power supply circuit for supplying power to the tuner, which constantly supplies power to the tuner or intermittently supplies it with a control signal from the MPU 11. The signals of the switches 36 and the output signal of the tuner 38 are input to the logic gate 40, and the output of the logic gate is
Connected to the MPU 11 as a wake-up signal. These input signals are not shown in the figure, but a very high frequency signal is removed by a hardware filter circuit. Reference numeral 41 denotes an oscillation circuit which oscillates during operation and stops oscillation during sleep to reduce current consumption. Reference numeral 12 denotes a communication IC for performing multiplex communication with another terminal processing apparatus via the communication bus 7. There is no problem even if this communication IC is built in the MPU.
[0011]
FIG. 7 is a configuration diagram of the terminal processing device 3. A communication IC 8 performs multiplex communication with the central processing unit CCU1 via the communication bus 7, transmits input data connected to the terminal processing device, and outputs output data to the actuators 6. A control circuit 42 performs transmission / reception. Reference numeral 43 denotes an oscillation circuit control circuit that detects a sleep / wake-up signal from the central processing unit and controls the operation and stop of the oscillation circuit. The oscillation circuit 41 oscillates or stops oscillating with this signal. Reference numeral 44 denotes an input / output interface circuit. The terminal processing devices 4 and 5 have the same configuration except for switches and actuators connected to the input / output circuit.
[0012]
The MPU 11 of the central processing unit 1 takes in inputs from switches 35 and 36 and antennas, other sensors, and input signals from other terminal processing devices, and motors and lamps connected to the central processing unit, and other The entire control is performed by calculating and outputting control data for the actuator of the terminal processing device. In such an in-vehicle system, when the vehicle is left unattended, the MPU clock oscillation is stopped or the second power supply circuits (1) and (2) are turned off to reduce battery consumption. Then, the clock in the terminal processing device is stopped to enter the sleep state. The switches 36 are a door switch, a key insertion switch, an ignition switch, and the like, and are switches for shifting from the sleep state to the operation state. Therefore, it is necessary to detect the switch state even in the sleep state. Therefore, the switch is pulled up to the battery voltage or constant voltage power supply circuit 30 so that the power can always be supplied even in the sleep state. The switches 35 are, for example, a wiper switch, a rear defogger switch, and the like, and do not change when the state of these switches is the sleep state. For example, in the case of a rear defogger switch, it operates only when the ignition switch is ON. Therefore, when the rear defogger switch is turned ON, the ignition switch is turned ON before that and is in an operating state. Therefore, since it is not necessary to detect the state of the switch in the sleep state, the power supplied to the switch is the second power circuit 32 or the third power circuit 33 that is turned off in the sleep state. The keyless tuner 39 needs to operate even during sleep, but current consumption increases when power is supplied constantly. Therefore, power is supplied from an intermittent power supply 39 that supplies power intermittently during sleep. The intermittent power supply always supplies power when the MPU is operating. The wake-up processing switches 36 and the tuner signal to be shifted from the sleep state to the operation state are connected to the logic gate NOR 40 in parallel with each input to the MPU. The output of the logic gate NOR40 is connected to the wakeup request terminal of the MPU. When this signal is input, the MPU activates the oscillation circuit 41 and starts the wakeup process.
[0013]
Next, the operation of this embodiment will be described with reference to FIG. When the entire system is in the sleep state, when a signal is input to the wakeup request terminal, the MPU
11 wakeup processing is started. First, in step 101, whether the wake-up signal from the tuner or the other wake-up signal is confirmed by a signal other than the tuner input other than the wake-up request terminal, and it is determined that it is a wake-up request from other than the tuner. In Step 105, another control unit in this embodiment transmits a wake-up request to the terminal processing devices 3, 4 and 5 via the multiplex communication line. When the terminal processing devices 3, 4 and 5 receive the wake-up request, the terminal processing devices 3, 4 and 5 start oscillation and start operation. Next, in step 106, the second power supply circuits (1) and (2) are turned on to start supplying power to all the circuits. After this processing, normal control processing is started from step 107. In this way, in the case of a wakeup signal other than the tuner signal, noise is rarely added to the signal, and high-frequency noise is removed by the hard filter circuit, so that the signal is input to the wakeup request terminal. If the signal is confirmed in step 101, it can be reliably determined as a regular signal. Therefore, the normal control is started with only one confirmation. Next, if it is determined in step 101 that a signal other than the tuner is not input, it is determined that the request is a wake-up request from the tuner, and step 102 is executed. Since power to the tuner is supplied only intermittently in the sleep state, a switching signal is output so that it is always supplied when a wake-up request signal is input. By doing in this way, it can be judged whether a subsequent signal is inputted correctly. Next, in step 103, it is determined whether or not the tuner signal is normal until it is determined in step 104 that all the tuner signals have been input. The tuner signal in the present embodiment continues for 50 m or more of the header signal 50 m with a 5 ms period, and then the encoded ID code and command are input. If it is determined that the tuner signal is abnormal before all the signals are input, a sleep process is performed in step 108, and the MPU stops oscillation and enters the sleep state again. When all the tuner signals are input, steps 105 and 106 are executed, the other control unit is activated, the second power supply circuit 32 and the third power supply circuit 33 are turned on, and power is supplied to all the circuits. In step 107, normal control processing is started. In this way, the entire system enters the normal operation state only when all the tuner signals are normally input. In this embodiment, it is assumed that all the tuner signals are input. However, for example, when only the header signal is input, the normal control may be performed. Furthermore, not all headers but a part may be input.
[0014]
Next, the effect of this embodiment will be described. When the tuner's intermittent power is supplied, all radio waves are present in the air, so noise is input, but it is usually a signal with a narrower pulse width than the regular signal because the frequency band is shifted. Since it is removed by a hard filter circuit, no wakeup request signal is input to the MPU. However, a signal having a pulse width similar to that of the normal signal may be input. In such a case, the MPU wakes up. In the case of the noise waveform as shown in FIG. 8, when a noise signal having the same pulse width as the regular signal is input.
A wake-up request signal is input to the MPU. The MPU starts oscillation and executes the wake-up process of FIG. However, since the tuner signal is immediately monitored by the wake-up process and judged as noise, the MPU immediately enters the sleep state, the terminal processing device remains in the sleep state, and the second power supply circuit remains off. . Since the intermittent power supply to the tuner is also turned off when the sleep state is entered, the power supply time supplied to the tuner is shorter than in the normal sleep state, and the current consumption of the tuner is also suppressed. In addition, even if a signal similar to the regular signal continues for a while as shown in FIG. 9, the terminal processing apparatus maintains the sleep state as in FIG. 8 because the normal control is not performed until all the keyless signals are input. The second and third power supply circuits 32 and 33 are also turned off. Also, once in normal operation, it is necessary to put the terminal processing device to sleep in the sleep process, or to check whether the terminal processing device actually sleeps, so it is determined that the keyless signal is not normal after shifting to normal control In this embodiment, the keyless signal is shifted to the normal operation state after the keyless signal is determined to be a normal signal, whereas the entire system does not go into the sleep state immediately after trying to enter the sleep state. If it is determined that the signal is not a normal signal, the entire system can be put into the sleep state immediately. Therefore, even when the keyless signal is not a regular signal, the terminal processing device and the second processing device can be used only when the keyless signal is normal, compared to the conventional device in which the MPU enters the operating state and all controls are normally operated. Since the power supply circuit is not activated, current consumption can be suppressed. FIG. 10 is a diagram illustrating an operation state when a regular tuner signal is input.
[0015]
The embodiment of the present invention has been described with reference to FIGS. 5, 6, and 7. The automotive electronic control apparatus to which the present invention is applied will be described in further detail. FIG. 12 is a system configuration diagram of the entire vehicle. Reference numeral 31 denotes a battery which supplies power to the electronic control device of the vehicle. An ignition key switch 50 distributes the power supply to each electronic control device according to the key position. When the key position is OFF, the power supply lines 90, 91 and 92 are disconnected from the battery power source. No power is supplied, and power is supplied only to the power supply line 90 when the key position is an accessory (hereinafter ACC), and power is supplied to the power supply lines 90 and 91 when the key position is ignition (hereinafter IGN). When the key position is a starter (hereinafter referred to as START), power is supplied to the power supply lines 91 and 92, and the power supply line 90 is disconnected from the power supply. Reference numeral 52 denotes a radio which operates by being supplied with power from a power supply line 90. Reference numeral 51 denotes a starter motor. When the key position becomes START, power is supplied from the power supply line 92, the starter motor rotates, and the engine is started. Although not shown, 53 is an engine control that performs fuel injection control and ignition control for driving a fuel injection valve (hereinafter referred to as an injector) 56, a fuel pump 57, and the like by an input from a sensor that measures the intake air amount and the engine speed. Device (hereinafter referred to as ECM). An anti-lock brake system (hereinafter referred to as ABS) control device 54 controls the ABS motor 58 and the like so that the wheels are not locked even when sudden braking is applied. Reference numeral 55 denotes an automatic transmission control device (hereinafter referred to as A / T) that controls the solenoids 59, 60 and the like to automatically shift gears of the transmission in accordance with the traveling state of the vehicle. The ECM 53, ABS 54, and A / T 55 are supplied with power from the power supply line 91 and operate. In other words, it operates when the ignition key is IGN or START.
[0016]
1 is a central processing unit CCU, and 3, 4, 5, and 69 are terminal processing units. Each device is connected by a multiplex communication line 7. Input information of switches connected to each device and output information of actuators such as lamps and motors are exchanged by multiplex communication to perform overall control. ing. These control devices 1, 3, 4, 5, and 69 are directly supplied with power from a battery, and are supplied with power regardless of the position of the ignition key switch. The CCU 1 is an I / O composed of the constant voltage power circuit 30, the second power circuit 32, the third power circuit 33 shown in FIG. 5, the tuner 38 shown in FIG. The interface 66, the MPU 11, and the communication IC 12 are included. Since these operations have been described previously, they will be omitted. The configurations of the terminal processing devices 3, 4, 5, and 69 are the same as those in FIG. 7, and the operation is also the same. In FIG. 12, the components related to the keyless entry system are mainly described. Reference numeral 68 denotes a transmitter for a keyless entry system. Reference numeral 37 denotes an antenna for receiving a signal transmitted from the transmitter. Although the antenna is described outside the CCU 1 in this embodiment, it may be installed inside the CCU 1. 2 is a trunk opener motor which is a motor for opening a trunk, 61 is a key insertion switch for detecting whether a key is inserted, 62 is a door switch for detecting opening / closing of a door, and 63 is for turning on / off a rear defogger.
A rear defogger switch for controlling OFF, 64 is a wiper switch, and 65 is an illumination lamp for switches such as the rear defogger switch 63 and the wiper switch 64. These switches, lamps, motors, etc. are connected to the CCU 1. In order to detect the position of the ignition key, ACC,
IGN and START signals are also connected. Terminal processing devices 3, 4, 5, and 69 are mounted on doors on the driver's seat, front passenger seat, right rear seat, and left rear seat, respectively, and door lock motors 71, 75 for locking / unlocking the respective doors. 79, 83 and power window motors 72, 76, 80, 84 for opening and closing windows are connected. Also, the terminal processing device 3 in the driver's seat is locked with a door lock switch 73 and a power window switch 74 that operate to lock / unlock the doors of all the seats, or a power window switch and a door other than the driver's seat that are not shown. A door lock detection switch for detecting whether or not is connected. Power window switches 77, 81, 85 are connected to the terminal processing devices 4, 5, 69 on the front passenger seat, the right rear seat, and the left rear seat.
[0017]
Next, the operation of the keyless entry system will be described. A keyless entry system is a system that remotely controls a door of a car to lock or unlock a door or open a trunk room with a signal from a wireless device. The keyless entry system is basically a system that operates when a person is not in the vehicle because it is a remotely operated system. When the key insertion switch is OFF, that is, when the lock switch of the transmitter is pressed when the key is not inserted, a lock signal is transmitted from the transmitter (details of the signal will be described later).
37, the CCU 1 determines that it is a lock signal, and the CCU 1 connects the communication ICs 12 to the communication ICs 8, 9, 10, and 70 of the terminal processing devices 3, 4, 5, and 69 via the multiplex communication line 7, respectively. A signal for operating the door lock motors 71, 75, 79, 83 to the lock side is transmitted. Upon receiving the signal, the communication ICs 8, 9, 10, and 70 of the terminal processing devices 3, 4, 5, and 69 output lock signals to the door lock motors 71, 75, 79, and 83 of the respective doors to lock the doors. Similarly, pressing the unlock switch on the transmitter unlocks each seat door. When the trunk switch of the transmitter is pressed, the CCU 1 outputs a signal to the trunk opener motor connected to the CCU 1 and opens the trunk.
[0018]
In general, when you get off the vehicle and leave the vehicle, you can press the door lock switch, press the door unlock switch while approaching the vehicle to get on the vehicle, or finish the shopping and trunk the luggage. Pushing the trunk switch while approaching the vehicle to store the car. Therefore, as described above, the control devices 1, 3, 4, 5, and 69 related to these are directly connected to the battery and always supplied with power. However, the keyless signal may be input immediately after leaving the vehicle, but may not be input for hours or days. If the control device is always operating for such a time, the current consumption is large, so the sleep state is set to suppress battery consumption. Specifically, the sleep condition is that the ignition key is OFF or the key is not inserted, the door is closed, there is no keyless input, and there is no output load at all. Yes. Since the operation when sleeping or the operation when waking up is described above, the description is omitted.
[0019]
Next, the details of the keyless entry system will be described. FIG. 25 is a diagram showing the overall configuration of the system. A signal emitted from the remote control 68 is received by the antenna 37 and guided to a tuner 38 built in the CCU 1 which is a master station. Here, the input signal is converted into a high and low digital signal as shown in FIG. 26 and input to the PI terminal of the MPU 11. Here, first, the signal of the remote control signal is decoded, and the key code is extracted. After the extraction of the key code is completed by the CPU 11, it is next determined whether or not the key code is correct. If it is determined that the key code is correct, a signal for driving the motor 6 is output to the communication IC 12. The communication IC 12 is connected to a plurality of LCUs 3 which are slave stations via a multiplex communication line 7 and performs half-duplex communication. Each LCU 3 has a unique address that does not overlap each other, and a communication target LCU can be selected by this address. A signal for driving the motor 6 is transmitted together with the address of the corresponding LCU to drive the motor 6.
[0020]
FIG. 26 shows a key code signal output from the tuner 38. The signal pattern is roughly divided into three parts. Of course, the remote control signal itself emitted from the remote control 68 is also a signal divided into three parts.
[0021]
The A part is a preamble part composed of a waveform in which “Hi” and “Lo” are regularly repeated. The preamble portion is a portion used by the CPU 11 to distinguish whether the signal output from the tuner 38 is noise or a remote control signal and to stabilize the operation of the tuner circuit.
[0022]
The B part is a data part which is a PWM signal (pulse width modulation). This data part is a command part (command signal part) of a remote control signal issued by the remote control 68. The B part is composed of a data head indicating the head of data, a command part composed of 8 bits (bit 7 to bit 0), and a parity bit.
[0023]
As shown in the figure, the details of the bits of the command part have a waveform that distinguishes “0” and “1” according to the pulse width. For each period T, the pulse width is
In the case of (1/3) T, “0” is expressed, and in the case of (2/3) T, “1” is expressed. Reading a command from the distinction between “0” and “1” is called command signal analysis described later. The following B ′ portion is the same signal as the B portion, and the MPU 11 performs signal analysis again to determine whether the result of the signal analysis of the B portion is really correct, and the signal analysis results of the B and B ′ portions are It is determined whether to make use of the result of signal analysis based on whether they match. In other words, it is a reason for performing two-way collation. Here, the B and B ′ portions do not have to have the same pattern. For example, the inverted signal of the B portion may be used as the B ′ portion to perform the inverted double collation.
[0024]
FIG. 15 shows a waveform output by the tuner 38 when no remote control signal is received.
[0025]
FIG. 15A shows a case where there is no noise in the frequency band received by the antenna 37. The waveform of the preamble portion from the tuner 38 is output as a continuous waveform that is always “Lo”.
[0026]
FIG. 15B shows a case where there is noise. An irregular pulse waveform is output.
[0027]
The difference between the regular waveform, the continuous waveform and the irregular fine pulse-like waveform described above is detected from the difference between the pulse periods and pulse widths of “Hi” and “Lo”, and whether the remote control signal is received or whether the remote control Differentiation of radio waves such as signal or noise is performed.
[0028]
First, the type of noise to be removed will be described. The noise shown in FIG. 15 is noise output from the tuner when no remote control signal is input, and is usually called white noise. This is just the noise of a zipper that occurs when FM radio is not receiving broadcast radio waves. The receiving device must distinguish this noise signal from the remote control signal. Next, high-frequency noise enters in the remote control signal reception state. This noise is generally characterized by high energy and a very narrow pulse width. In particular, in a gasoline engine such as an automobile, such noise is generated because ignition noise is generated due to fuel ignition. Therefore, the receiver must remove two noises, white noise and single high frequency noise.
[0029]
FIG. 16 shows a waveform in the case where there is no noise in the key code signal when a remote control signal is input, and in the case where there is no noise. In the figure, the “noisy” signal is inputted with a signal having a narrow high-frequency width, and the original signal is contaminated. This noise corresponds to the latter in the above description.
[0030]
In general, when recovering an input signal, the input signal is sampled by a method based on the sampling theorem, and the input signal is recovered according to the sampling period. However, the noise position matches the sampling timing. If this happens, correct sampling could not be performed. For this reason, the sensitivity of the receiver is reduced so that noise is not picked up. However, this method is not a good solution because it makes it difficult to pick up not only noise but also regular signals. Therefore, as shown in the present invention, after sampling at the sampling period, if the input signal is checked again after a time sufficiently shorter than the sampling period, noise can be easily removed.
[0031]
FIG. 17 is a flowchart for distinguishing between white noise and a remote control signal, and a method for avoiding when the sample timing and noise coincide with each other. Basically, the fixed-time interrupt process 200 is a process executed at each sampling period set based on the sampling theorem, and monitors the preamble part (A part) of the tuner output signal to determine whether the remote control signal or white noise is detected. This is a process for distinguishing radio waves.
[0032]
If the level of the PI terminal to which the tuner output signal is input is “H” in step 201, a predetermined delay time is set in step 203. This delay time needs to be set to a sufficiently long time corresponding to the pulse width of the high frequency noise to be removed. In step 204, the state of the PI terminal is confirmed again. Here, when the state of the PI terminal is “L”, that is, when the state has changed once after the time has elapsed in step 203 after being recognized as being “H” once, The state confirmation of the PI terminal performed in step 201 or step 204 is invalid. In other words, either has caught the noise. Therefore, the process returns to step 201 again to confirm the state of the PI terminal. Therefore, the processing up to this point is repeated until the state of the PI terminal before and after the delay time in step 203 is matched by double collation. Therefore, it can be seen that noise of a frequency (short pulse width) faster than the delay time set in step 203 is ignored by this processing. Processing 202 and processing 205 are the same, only the logic of the PI terminal is reversed. Next, specific signals will be described with reference to FIG.
[0033]
FIG. 18 shows the difference in the recognized waveform (extracted waveform) when noise enters the input signal of the PI terminal and the sample timing matches the position of the noise. A. In the case of not using the present invention, noise is determined as a signal, so that the extracted waveform is destroyed and correct waveform recognition is not performed. On the other hand, b. In the case of the present invention, correct waveform recognition is performed by the two-way collation in steps 201 to 205 shown in FIG. As described above, according to the present invention, even if high-frequency noise enters the PI terminal, the signal is reconfirmed until they are matched by the two-way verification, so that it is understood that correct waveform recognition is performed.
[0034]
Returning to the fixed-time interrupt process of FIG. As described above, this processing is basically processing for monitoring the preamble portion (A portion) of the tuner output signal and distinguishing the radio wave between the remote control signal and the white noise. In step 206, when the sample timing and the noise match, it is checked whether or not the counter CT1 is zero. If 0, the flag HIOK is cleared in step 207.
[0035]
Subsequently, at step 208, the counter CT1 is incremented, and at step 209, the counter CT2 is cleared. If the counter CT1 exceeds 4 in step 210, the flag HIOK is set in step 211.
[0036]
On the other hand, if it is not “Hi” in step 205, it is checked in step 212 whether the counter CT2 is zero. If 0, the flag LOOK is cleared in step 213.
[0037]
Subsequently, at step 214, the counter CT2 is incremented, and at step 215, the counter CT1 is cleared. In step 216, if the counter CT2 exceeds 4, in step 217, the flag LOOK is set.
[0038]
In step 218, it is determined whether both the flags HIOK and LOOK are set. If it is set, the flag RCOK is set in step 219. That is, the remote control signal is determined. In step 220, the fixed-time interrupt process is stopped.
[0039]
As described above, radio wave discrimination uses fixed-time interrupt processing and
Judgment is made from the pulse width and pulse period of “Hi” and “Lo”. In this embodiment, a case where the pulse width and pulse period of “Hi” and “Lo” are regularly repeated is determined as a remote control signal.
[0040]
The MPU 11 has a pulse width measurement function that stores the time when the rising edge and the falling edge of the signal input to the PI terminal are input. Usually, the MPU 11 uses this function to measure the pulse width and the pulse cycle. Can be measured accurately. According to the method shown in FIG. 17, the reason why it is necessary to avoid the problem that when a large amount of white noise is input, the processing by the pulse width measurement function is repeated many times and other processing cannot be executed. It is to do.
[0041]
As described above, in the present invention, the white noise and the remote control signal are first separated as shown in FIG. 17, and then the remote control signal is analyzed using the pulse width measurement function in the MPU 11. There is an advantage that an accurate remote control signal can be analyzed even in a place with a bad noise environment. It should be noted that the fixed time interval of the fixed time interrupt processing, the number of counters, and the like need to be adjusted so that radio waves can be reliably discriminated in accordance with differences in the remote control signal and noise waveforms, sampling methods, and the like.
[0042]
Next, remote control signal analysis processing will be described. FIG. 19 shows a process for recognizing the key code of the remote control signal input to the PI terminal using the pulse width measurement function built in the MPU 11. This process is automatically started by RCOK = "1" set in step 219 of FIG. Since the activation method is not related to the present invention, it is omitted.
[0043]
First, the pulse width measurement function built in the MPU 11 will be described. FIG. 20 is a schematic diagram of the pulse width measurement function. The edge detector 1010 always observes a signal input to the PI terminal by selecting whether to catch a rising edge or a falling edge according to a command from the edge selector 1011. Commands to the edge selector can be arbitrarily selected by software. The latch circuit 1012 holds the current value of the free-run timer 1013 based on the edge detection signal from the edge detector 1010. The free-run timer 1013 is a 16-bit counter that always keeps counting up for a fixed time (1 μs in this embodiment). The free-run timer 1013 counts from $ 0000 to $ FFFF, and when it exceeds $ FFFF, it starts from $ 0000. It is supposed to start counting up. That is, when a command is sent from the edge selector 1011 to the edge detector 1010 so as to capture the rising edge, the edge detector 1010 monitors the rising edge of the signal input to the PI terminal, and the rising edge is input. Then, the operation of holding the value of the free-run timer 1013 at that time in the latch circuit 1012 is performed.
[0044]
Next, a method for measuring the pulse width will be described with reference to FIG. FIG. 21 shows the input signal of the PI terminal and the value of the free-run timer 1013. The value of the free-run timer at the first rising point A of the PI terminal is $ F000, and the value of the next falling point B is $. It shows that the value of 8000 and the next rising point C is captured as $ 1000. Since the time flows from left to right, the level of the PI terminal is
The pulse width (T) that is “Hi” is a count value obtained by subtracting the value of the A point from the value of the B point. Similarly, the pulse width (T ′) being “Lo” is a count value obtained by subtracting the value of the B point from the value of the C point. Since the time required for the free-run timer to count 1 is 1 μs, the times T and T ′ can be easily obtained by multiplying the count value by the time 1 μs. Therefore, if T, ($ 8000) − ($ F000) = $ 9000, and similarly T ′ becomes ($ 1000) − ($ 8000) = $ 9000. Since this value is a hexadecimal number, a time of 36.864 ms comes out when converted to a decimal number and time-converted. After that, it can be understood that measurement such as pulse width and pulse period can be freely performed by setting the falling and rising of the signal at the PI terminal.
[0045]
Next, returning to the signal analysis processing of FIG. 19, a method for receiving a remote control signal and a method for removing noise when high frequency noise has entered during reception of the remote control signal will be described. First, a general flow of signal analysis processing will be described. When it is determined that the remote control signal has been input by the fixed time interrupt process of FIG. 17, the signal analysis process of FIG. 19 starts. If the signal analysis is completed in step 301, the process jumps to step 306 to stop the command signal analysis process itself, and in step 307, the fixed-time interrupt process is started and ended. That is, it returns to the state of waiting for the remote control signal.
[0046]
If the signal analysis is not completed, it is determined in step 302 whether the analysis of the A part (preamble part) is completed. If not completed, the analysis of part A is continued in step 400. The analysis of part A in step 400 reconfirms whether the radio wave discrimination performed in FIG. 17 is really correct.
[0047]
If the detection of part A has been completed, it is checked in step 303 whether the analysis of part B (data part) has been completed. If not, the analysis of part B is continued in step 500. In step 500, the key code analysis is actually performed.
[0048]
In step 304, an abnormality such as a difference in waveform pulse width, pulse period, pattern, or data frame time over is checked. If there is an abnormality, the analyzed command is deleted in step 305. Subsequently, in step 306, the own command signal analysis process is stopped, and in step 307, the fixed time interrupt process is started and ended.
[0049]
Next, the preamble analysis process shown in step 400 will be described. This process is a process of analyzing the A part of the remote control signal as described above. Part A is a regular square wave with a duty of 50% as shown in FIG. 14, and in this embodiment, it is determined that this signal is the head of the remote control signal only when this signal continues for a certain time (TM1).
[0050]
FIG. 22 is a flowchart of preamble analysis processing. In step 401, the timer TMR is first cleared. This timer is counted up by a fixed-time process different from the fixed-time interrupt process of FIG. 17, and eventually measures the edge interval of the signal input to the PI terminal. The signal analysis process of FIG. 19 is a process that is activated only when there is an input signal. Therefore, if there is no signal, it is not activated indefinitely. Therefore, it is used to detect that the signal is not input to the PI terminal (that is, the remote control signal is not received), interrupt the signal analysis process, and return the process to the initial state. By this process, even if the remote control signal is interrupted after the signal analysis of the remote control signal is started, an abnormality will be noticed, so it will be possible to start over from the beginning. Can do.
[0051]
In step 402, it is determined whether the input edge is rising or falling. If it is rising, a certain period of time is waited in step 403. In step 404, the input signal level at the PI terminal is confirmed. Here, when the signal level is “L”, that is, when the rising edge of the input signal of the PI input terminal is captured but the signal does not rise, it can be determined that the captured signal is high-frequency noise. Here, the processing is interrupted and step 400 is terminated to prepare for a new input signal. Similarly, when it is determined in step 402 that the edge is a falling edge, a delay time is provided in step 405, and the input signal level is confirmed in step 406. Again, if the signal level is “H” in spite of the falling, it is determined as high frequency noise and step 400 is ended.
[0052]
Next, the processing so far will be described with reference to FIG. FIG. 23 shows how the signal waveform in the case where high-frequency noise (automotive ignition noise, etc.) is put on the remote control signal input to the PI terminal, its enlarged view, and the processing at each step are effective. Indicates whether or not In general, high-frequency noise is pulse-like narrow noise and is removed using this characteristic. In FIG. 23, it is assumed that, while analyzing the preamble signal, after detecting the rising edge of the remote control signal, the next falling edge is detected and noise is input while attempting to measure the pulse width. Yes.
[0053]
When the falling edge of the signal is input to the PI terminal and the signal analysis process of FIG. 19 is started, the preamble analysis process of step 400 is executed. Since it is a falling edge, first, a delay in step 405 is performed, and a certain time is waited. Since this time is data that should be varied according to the pulse width of the noise to be removed, the number of times cannot be generally determined. Thereafter, at step 406, the level of the PI terminal is checked. Then, since the start condition of step 400, that is, the falling edge is captured, if the signal is of course “H”, of course, the delay time in step 405 It can be understood that a short pulse is input. Since the signal pattern of the remote control signal input to the PI terminal is naturally known on the receiving device side, such a short signal can be easily detected as an abnormal signal.
(Noise) can be determined. Therefore, even if high frequency noise is input a plurality of times, it can be determined that it is noise. If there is noise near the edge of the correct remote control signal, this noise may be judged as a regular signal. However, the error caused by this is a delay time, so that the time is not short. For example, in the case of the present embodiment, the pulse width of the regular remote controller is about 2 ms, and the time (delay time) of noise to be removed is about 10 μs. By performing the processing as described above, it becomes possible to completely separate high-frequency noise, so that it is possible to provide a signal analysis technique that is resistant to noise environments.
[0054]
Returning to FIG. 22, the description will be continued. First, when a rising edge is detected, TP2 is measured in Step 407 through Step 404 through Step 403. In the first case, since there is no data at the time SVFRCT at which the previous rising edge was input, the value of TP2 is random. TP2OK is a flag for determining whether or not the pulse period TP2 is regular. In step 411, the edge selector 1011 shown in FIG. 20 is switched to select the falling edge. In step 412, the rising edge time is stored in SVFRCT. Thereby, it is understood that the SVFRCT data is the time when the rising edge of the signal input to the PI terminal is input. And in step 418,
It is determined whether both TP1OK and TP2OK are “1”. In this case, the answer is NO, so TM1 is cleared in step 420. TM1 is TP1OK,
This timer is started when both TP2OK are "1" and is counted up in the same manner as the TMR at step 401. This timer is used to determine that the preamble detection is complete only when the preamble is detected for a certain period of time. After the preamble detection is completed, the next key code analysis process is started. It also specifies the time to complete. In this embodiment, in order to recognize the remote control signal more reliably, a timer (TMR) for detecting interruption of the remote control signal and a timer for defining a time limit from the preamble signal detection to the start of key code analysis.
(TM1) uses a timer (TM2) that defines a time limit from the start of key code analysis to the end of analysis. Although not described in the present embodiment, when the TM1 timer exceeds the specified time, a sign of completion of preamble part analysis in step 302 in FIG. Is detected, the signal analysis process is initialized, and the next remote control signal can be input in a short time.
[0055]
The reference time was determined by storing data in the SVFRCT. Further, since the PI terminal is set to capture the next falling edge, it waits for the falling edge.
[0056]
When the falling edge is input, this time, from step 402, it goes through step 405 and step 406, and in step 413, TP1 is measured. ICR is the value of the free-run timer captured by the latch circuit 1012 in FIG. Therefore, if SVFRCT is subtracted from ICR, the required time from the rising edge to the falling edge is obtained, and it can be understood that this is the pulse width of the “Hi” time of the signal input to the PI terminal. In addition, it can be easily understood that TP2 is the time from the rising edge to the rising edge, that is, pulse period data. Furthermore, TP1L, TP1H and TP2L, TP2H
This is the limit value of the tolerance range that is determined to be a normal signal of TP1 and TP2, and when there are TP1 and TP2 within this tolerance range, the flags TP1OK and TP2OK are set, and cleared when they are outside the tolerance range I understand that.
[0057]
The relationship between each data and the limit value is shown in FIG. From this figure, TP1 is the pulse width, and TP1H and TP1L are their tolerance ranges. TP2 is a pulse period, TP2H and TP2L are tolerance ranges thereof, and the difference from the point B to the point A of the free-run timer is TP1, the difference from the point C to the point A is TP2, and so on. The measurement is repeated.
[0058]
From the above, it can be understood that FIG. 22 is a process for analyzing and detecting a preamble portion that is resistant to a noise environment.
[0059]
Next, the key code analysis process which is step 500 in FIG. 19 will be described. First, at step 501, timer TMR clear, timer TM1 clear, and timer TM2 activation determination processing are executed. The TMR is the same as that executed in step 401 in FIG. 22 and is used for the same purpose, so the description thereof is omitted. Step 502 is processing for removing high-frequency noise. This is also the same as the contents described in FIGS. Next, in step 503, the input edge is checked to determine whether it is a rising edge or a falling edge. In the case of the falling edge, the pulse width is measured as described in FIG. 22, but in the case of the key code, the identification of data “0” and data “1” is added depending on the size of the pulse width. Is done. This is as described in FIG. From step 507 to step 511, the data “0” and “1” are recognized depending on in which area the falling edge is located. If the data is not in either area, the processing is immediately terminated. I am letting. This means that signals outside the determination area range are ignored. Conversely, any data within the determination area is recognized as data. Here, if a remote control signal having a signal pattern similar to that of the present embodiment is input, a phenomenon that is easily recognized as data occurs, but this problem is caused by repeatedly inputting the data portion a plurality of times. Measures are being taken. In other words, multiple frames of the captured data portion are collated to determine whether or not it is genuine (B and B ′ portions shown in FIG. 14).
[0060]
In this way, in this embodiment, by actively capturing a signal that approximates a remote control signal, it is designed to help improve the sensitivity of reception sensitivity, and the reliability of data can be verified by multiple verification of the captured data. We provide a receiver that is secure and resistant to noise.
[0061]
If it is determined in step 503 that it is rising, step 504 to step
In 506, it is determined whether the rising position is normal. When normal, the flag TD3OK = "1", and when abnormal, TD3OK = "0". Step
In 512, the flag TD3OK and the pulse width recognition result are checked. If there is an abnormality, initialization processing is executed in step 518, and the signal analysis processing in FIG. 19 is repeated from the beginning. If the result is normal in step 512, the authorization data is stored in step 513, and the timer TM1 is cleared and the timer TM2 is started in step 514. TM1 is a timer that is activated in step 419 in FIG. 22, and is a timer that defines the preamble duration and the time until key code recognition is started. Cleared here. The timer TM2 is a timer that is activated only once when the key code analysis process starts, and is a timer that defines a time limit from the start of key code analysis to the completion of key code extraction. Similarly, this timer is a timer that is counted up by fixed time processing different from fixed time interrupt processing. It detects abnormalities when key code detection is prolonged or the signal is interrupted, and it can be restarted immediately from the beginning. It can be executed. As in the present embodiment, by incorporating a timer for limiting the time for executing processing everywhere, signal analysis without wasted time can be performed even when there is an abnormality.
[0062]
Next, in step 515, it is determined whether or not all of the data has been imported. If it has been completed, in step 516, data verification is performed. Here, it is determined whether or not multiple collations are the same data. If the determination result is OK, the key code is extracted in step 518 and becomes the basis of a signal for operating the motor 6. In the case of NG, it is initialized in step 519 and starts again from the beginning.
[0063]
FIG. 26 shows the relationship between data values of data “0”, “1”, pulse period and their tolerances with respect to the PI terminal input signal. Here, a case where data “0” is input is indicated by a solid line, and a broken line portion indicates a position where data “1” is input. Basically, the content is the same as FIG.
[0064]
As described above, according to the present embodiment, since noise and signal can be separated without reducing the sensitivity of the receiver, it is possible to provide a remote control device that can exhibit the same performance even in a place where the noise environment is bad.
[0065]
Embodiments of this example are listed below.
[0066]
Embodiment 1
An electronic control device having a microcomputer having a function of switching between a sleep state in which oscillation is stopped and an operation state, and transitioning from the sleep state to the operation state by at least one external input signal. When the input signal changes, the microprocessor shifts to an operating state. Before starting normal processing, the microprocessor determines whether the input signal is normal or abnormal. If it is determined that it is normal, normal processing continues. The electronic control device is characterized in that when it is determined that there is an abnormality, it immediately shifts to the sleep state.
[0067]
Embodiment 2
The electronic control device according to Embodiment 1, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0068]
Embodiment 3
A microcomputer having a function of switching between a sleep state in which oscillation is stopped and an operation state; and at least one first power supply circuit that always supplies power; and supply of power by a signal from the microcomputer An electronic control device that has at least one or more second power supply circuits that can be stopped and makes a transition from a sleep state to an operation state by at least one or more input signals from the outside. When the power supply circuit is stopped and the input signal changes in the sleep state, the microprocessor shifts to the operating state, but before starting normal processing, determines whether the input signal is a normal signal or an abnormal signal, If it is determined to be normal, a signal for starting the second power supply is output, normal processing is started as it is, and it is determined to be abnormal. Kiniwa, electronic control device, characterized in that shifts to immediately sleep without starting the second power supply.
[0069]
Embodiment 4
The electronic control device according to Embodiment 3, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0070]
Embodiment 5
A microcomputer having a plurality of control devices, the plurality of control devices being connected by multiplex data communication, and at least one control device having a function of switching between a sleep state in which oscillation is stopped and an operation state And when a transition is made from the sleep state to the operation state by at least one input signal from the outside of the control device, the other control device is instructed to transition from the sleep state to the operation state by multiplex data communication. In the electronic control device that issues, when the input signal changes in the sleep state, the microprocessor shifts to the operating state, but before starting normal processing, determine whether the input signal is a normal signal or an abnormal signal, If it is determined to be normal, normal processing is started as it is, and another controller is instructed to shift to an operating state, but it is abnormal. If it is determined in the electronic control apparatus, characterized in that shifts to immediately sleep without issuing the instruction to transition to operating state to the other control device.
[0071]
Embodiment 6
The electronic control device according to Embodiment 5, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0072]
Embodiment 7
It has at least one or more power switching means for connecting or disconnecting battery power depending on the state of the vehicle, and has at least one first control device that receives power supply from the power switching means. And having at least one second control device that is not directly supplied with power from the power supply switching means but directly supplied with power from the battery, and the second control device is in a sleep state and an operating state in which oscillation is stopped. In an electronic control device having a microcomputer having a function of switching between, and shifting from a sleep state to an operation state by at least one external input signal, when the input signal changes in the sleep state, the microprocessor Transition to the operating state, but before starting normal processing, determine whether the input signal is normal or abnormal. Mom normal processing starts, the electronic control apparatus, characterized in that immediately shifts to the sleep state when it is determined that it is abnormal.
[0073]
[Embodiment 8]
The electronic control device according to Embodiment 7, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0074]
Embodiment 9
It has at least one or more power switching means for connecting or disconnecting battery power depending on the state of the vehicle, and has at least one first control device that receives power supply from the power switching means. And having at least one second control device that is not directly supplied with power from the power supply switching means but directly supplied with power from the battery, and the second control device is in a sleep state and an operating state in which oscillation is stopped. At least one first power supply circuit that always supplies power and at least one power supply that can be stopped by a signal from the microcomputer In an electronic control device that has a second power supply circuit and shifts from a sleep state to an operation state by at least one input signal from the outside, When the input signal is changed in the sleep state, the microprocessor shifts to the operating state. However, before starting normal processing, the input signal is normal or abnormal. If it is determined that the signal is normal, a signal for starting the second power supply is output, and normal processing is started as it is. If it is determined that the signal is abnormal, the second power supply is started. An electronic control device that shifts to a sleep state immediately without doing so.
[0075]
[Embodiment 10]
The electronic control device according to Embodiment 9, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0076]
Embodiment 11
It has at least one or more power switching means for connecting or disconnecting battery power depending on the state of the vehicle, and has at least one first control device that receives power supply from the power switching means. And having at least one or more second control devices that are not directly supplied with power from the power supply switching means but directly supplied with power from the battery, and the second control devices are connected by multiplex data communication. At least one control device has a microcomputer having a function of switching between a sleep state in which oscillation is stopped and an operation state, and operates from the sleep state by at least one input signal from the outside of the control device. In the electronic control device that issues a command to shift to the operating state from the sleep state by multiplex data communication to the other control device when shifting to the state, When the input signal changes in the leap state, the microprocessor shifts to the operating state. Before starting normal processing, the microprocessor determines whether the input signal is a normal signal or an abnormal signal. The normal processing is started as it is and a command is issued to the other control device to shift to the operating state, but when it is determined to be abnormal, a command to shift to the operating state is not issued to the other control device. The electronic control device is characterized in that it immediately shifts to a sleep state.
[0077]
Embodiment 12
The electronic control device according to Embodiment 11, wherein at least one of the input signals to be shifted from the sleep state to the operation state is a signal from a radio such as radio waves or infrared rays.
[0078]
Embodiment 13
In an automotive electronic control device that receives a signal from a remote control device and activates at least some of the equipment of the vehicle,
An electronic control device for an automobile, comprising a determination function for determining whether a signal from a remote control device is noise.
[0079]
[Embodiment 14]
In a vehicle electronic control device including a tuner that receives a signal from a remote control device, and having a microcomputer that activates at least a part of the in-vehicle device when receiving a signal from the remote control device by the tuner,
When the vehicle system is stopped, the power supply to the tuner is intermittently supplied. When the microcomputer receives the wake-up signal, the power supply to the tuner is switched to a normal supply state and the tuner is turned on. A function for monitoring an output signal is configured to operate, and when the microcomputer determines that the tuner has successfully received a signal from the remote control device, a wake-up request for wake-up of a predetermined device is provided. An electronic control device for automobiles characterized in that output is provided.
[0080]
Embodiment 15
A tuner having a tuner that receives a signal from a remote control device and outputs a predetermined signal to the microcomputer of the in-vehicle control device. When the microcomputer wakes up due to generation of a wakeup signal, the wakeup signal If the signal is received from the tuner, and if it is received from the tuner, the function to determine whether the signal is due to noise is executed. An electronic control device for an automobile, wherein a predetermined device is activated by the microcomputer.
[0081]
Embodiment 16
With a tuner that receives a signal from a remote control device and sends a signal to the microcomputer of the in-vehicle control device,
The output of the tuner is input to an output system that is input to a wake-up terminal of the microcomputer together with another wake-up signal line for wake-up of the microcomputer, and to a digital signal input terminal of the microcomputer. An electronic control device for an automobile having two output lines with an output system.
[0082]
Embodiment 17
A vehicle electronic control device having a tuner that receives a signal from a remote control device, and a microcomputer that controls start-up of an in-vehicle device in accordance with an output signal of the tuner,
A noise removing device for removing high frequency noise contained in the output signal of the tuner, and
Wherein the noise removing device is executed by software of the microcomputer, and the microcomputer periodically samples a signal input from the tuner to the microcomputer;
A step of confirming again a signal input to the microcomputer from the tuner after being set shorter than the sampling period and longer than the period of the high-frequency noise to be removed;
An automotive electronic control device, comprising: performing a step of determining the presence or absence of noise from the state of a signal obtained by both steps.
[0083]
[Embodiment 18]
In an automobile electronic control device configured to receive a signal from a remote control device and wake up a microcomputer,
The electronic control device for an automobile according to claim 1, wherein the microcomputer is configured to switch the power supply to the tuner from an intermittent power supply to a continuous power supply after wakeup.
[0084]
[Embodiment 19]
In an automotive electronic control device that remotely controls an in-vehicle device by operating a remote control device,
The tuner that receives the signal of the remote control device is limited to a low power supply state when the vehicle system is stopped. If the remote control device is operated at this time, the vehicle system is stopped. An electronic control device for an automobile, characterized in that the power supply to the tuner is switched to a normal power supply state.
[0085]
【The invention's effect】
According to the present invention, since the normal operation is performed only after determining whether or not the keyless signal is a regular signal, current consumption can be suppressed even if a signal having a lot of noise is input.
[Brief description of the drawings]
FIG. 1 is a block diagram of a central processing unit according to an embodiment to which the present invention is applied.
FIG. 2 is a conventional example.
FIG. 3 is a conventional example.
FIG. 4 shows an operation state in the conventional example.
FIG. 5 shows an operation state in the conventional example.
FIG. 6 is a system diagram when the present invention is applied to a multiple communication system.
7 is a block diagram of the terminal processing apparatus of FIG. 6. FIG.
FIG. 8 is a diagram illustrating an operation state in the embodiment.
FIG. 9 is a diagram illustrating an operation state in the embodiment.
FIG. 10 is a diagram illustrating an operation state in the embodiment.
FIG. 11 is a flowchart illustrating operation.
FIG. 12 shows another embodiment when applied to an automobile.
FIG. 13 is a system configuration diagram showing an embodiment of the present invention.
FIG. 14 is a signal waveform of a remote controller showing the operation principle of the present invention.
FIG. 15 is a signal waveform of a remote controller showing the operation principle of the present invention.
FIG. 16 is a signal waveform of a remote controller showing the operation principle of the present invention.
FIG. 17 is a flowchart showing the operation principle of the present invention.
FIG. 18 is a timing chart showing the operation principle of the present invention.
FIG. 19 is a flowchart showing the operation principle of the present invention.
FIG. 20 is a part of an internal configuration diagram of a system showing an operation principle of the present invention.
FIG. 21 is a timing chart showing the operation principle of the present invention.
FIG. 22 is a flowchart showing the operation principle of the present invention.
FIG. 23 is a timing chart showing the operation principle of the present invention.
FIG. 24 is a timing chart showing the operation principle of the present invention.
FIG. 25 is a flowchart showing the operation principle of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Central processing unit, 2 ... Loads connected to central processing unit, 3, 4, 5 ... Terminal processing unit, 6 ... Loads connected to terminal processing unit, 7 ... Multiple communication line, 8, 9 , 10 ... Communication IC of terminal processing apparatus, 11 ... Communication IC of central processing apparatus, 12, 56 ... MPU, 30 ... Power supply circuit, 31 ... Battery, 32, 33 ... Second power supply circuit, 34 ... Resistance, 35 ... Switches, 36 ... Wake-up switches, 37, 54 ... Antenna, 38, 55 ... Tuner, 39, 53 ... Tuner power supply circuit, 40, 57 ... Logic gate, 41, 58, 59 ... Oscillator circuit, 42 ... Communication control circuit 43 ... Oscillation control circuit 44 ... Input / output interface 50 ... Conventional control device 65 ... Processing circuit 1010 ... Edge detector 1011 ... Edge selector 1012 ... Latch circuit 1013 ... F Rantaima.

Claims (7)

An electronic control device operated by a wireless device,
A microcomputer that executes a communication control program for performing data communication with another control device connected by a communication line;
A receiver that, when receiving a wireless signal, sends the received signal to the microcomputer;
The microcomputer is
When a signal is received from the receiver during standby in the sleep mode, the received signal determination program that cancels the sleep mode and determines whether the signal is a normal control signal from a known transmitter or noise. Run
When it is judged as noise, it shifts to the standby state in the sleep mode again,
When it is determined that the normal control signal and executes a communication control program, an electronic operated at radio apparatus for transmitting a wake-up request signals via the communication line to the other control devices connected by a communication line Control device. An electronic control device operated by the wireless device according to claim 1,
The reception determination program is an electronic control device operated by a wireless device that determines whether a signal from a receiver is a normal control signal from a known transmitter or noise by performing a two-way verification. An electronic control device operated by the wireless device according to claim 2,
When the signal from the receiver is received, the two-way collation determines a change in the signal from the receiver after a lapse of a predetermined delay time. When there is no change in the signal, normal control from a known transmitter is performed. An electronic control device operated by a wireless device that determines that the signal is a signal and determines that the signal is a noise when there is a change in the signal. An electronic control device operated by the wireless device according to claim 3,
Said predetermined delay time of duplicate verification, the electronic control device operated by the wireless device is longer than a pulse width of the high frequency noise which attempts to remove. An electronic control device operated by any one of the wireless devices according to claim 1,
A key insertion detecting device for detecting whether or not a key is inserted in the key switch, a door closed state detecting device for detecting whether or not the door is closed, and an input / output interface to which the receiver is connected ,
Signals from the receiver, the key insertion detection device, and the door closing state detection device captured via the input / output interface are input to the microcomputer, and the reception signal is a reception signal input from the receiver. An electronic control device operated by a wireless device that determines whether or not there is. An electronic control device operated by any one of the wireless devices according to claim 1,
The other control device connected by the communication line is an electronic control device operated by a wireless device that is an actuator for a trunk opener for opening a trunk. An electronic control device operated by any one of the wireless devices according to claim 1,
An electronic control device operated by a wireless device that receives power directly from a battery without using a key switch connected to the battery.

Images