JP2012053208A - Display processor and signal supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display processor and the like capable of performing a display according to a type of a stop state of an external device.SOLUTION: This display processor includes: signal reception means for receiving a signal representing a state of an external device; and display processing means allowing a display unit to display a display mode according to the signal received by the signal reception means. The signal includes a normal stop signal representing a normal stop state, or an abnormal stop signal representing a stop state due to abnormality. The display processing means varies the display modes whether the signal is the normal stop signal or the abnormal stop signal.

Description

  The present invention relates to a display processing device and a signal supply device.

  As this kind of technology, in Patent Document 1, when the main switch is turned on while the ABS switch is pressed, the ABS warning lamp in the meter unit is turned on, and the ABS switch is kept on. If the ABS warning light continues to be turned on for a first predetermined time (for example, 5 seconds), the ABS warning light is turned off. After the ABS warning light is turned off, the second predetermined time (for example, 1 second) is turned off. When the ABS changeover switch is released before the elapse of time, the ABS is switched to the stop mode and the blinking of the ABS warning light is started.

  Further, Patent Document 2 discloses a warning that forcibly cuts off the power supply to the solenoid that controls the hydraulic actuator when the antilock brake system is abnormal, using a main relay, and switches to a normal brake system and lights a warning lamp. In the lamp control circuit, there is provided a warning lamp provided with an opening / closing means for electrically opening the warning lamp and the main relay between the warning lamp and the failure code blinking control means of the warning lamp in the event of the abnormality. A control circuit is disclosed.

JP 2008-213512 A Japanese Utility Model Publication No. 5-62376

  However, when there is a first device (a device in which a lamp is disposed) and a second device (ABS or the like) and a second device (ABS or the like) as in the above technology, in the above technology, the stop state type of the second device The display (flashing lamp, etc.) corresponding to is not possible with the first device. Further, even if the operation state of the second device is specified from the first device (designation of stop, etc.), if the second device is not in the same operation state, no action can be taken. In addition, the second device cannot notify the first device of a plurality of different states of the second device.

  The present invention has been made in view of the above points, and a first object of the present invention is display processing capable of display according to the type of stop state of an external device, which is a second device. To provide an apparatus. Further, the second object is to provide a signal that can be used when an external device is not in the operation state when the operation state of the external device is designated (designation such as stop). It is to provide a supply device. A third object is to provide a signal supply device capable of notifying an external device of a plurality of different states.

A display processing apparatus according to a first aspect of the present invention includes:
Signal receiving means for receiving a signal representing the state of an external device;
Display processing means for causing a display unit to display a display mode according to the signal received by the signal receiving means,
The signal includes a normal stop signal indicating a normal stop state, or an abnormal stop signal indicating a stop state due to an abnormality,
The display processing means makes the display mode different depending on whether the signal is the normal stop signal or the abnormal stop signal.
It is characterized by that.

A signal supply device according to a second aspect of the present invention is:
Signal supply means for supplying a first signal for designating a state of the external device to an external device;
Signal receiving means for receiving a second signal representing the state of the external device;
With
The signal supply means is configured to output the first signal again when a state specified by the first signal supplied from the signal supply means is different from a state indicated by the second signal received by the signal reception means. To the external device,
It is characterized by that.

A signal supply device according to a third aspect of the present invention is:
A signal supply device that supplies a signal representing its own state to the outside,
When the own state is normal, a predetermined PWM signal is supplied to the outside, and when the own state is abnormal, a PWM signal having a pulse width different from that of the predetermined PWM signal is supplied. Comprising control means for supplying to the outside,
It is characterized by that.

  According to the display processing apparatus according to the first aspect of the present invention, it is possible to perform display according to the type of stop state of the external apparatus. Further, according to the signal supply device according to the second aspect of the present invention, when the operation state of the external device is designated, it is possible to cope with the case where the external device is not in the same operation state. . In addition, according to the signal supply device according to the third aspect of the present invention, it is possible to notify an external device of a plurality of different states of itself.

1 is a configuration diagram of a display processing system according to an embodiment of the present invention. It is a flowchart of the 2nd electric signal supply process which ECU of the display processing system of FIG. 1 performs. It is the figure which put together the relationship between the state of an external unit in a display processing system, a 2nd signal, and the display mode of a display processing system.

  An embodiment according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by the following description and drawing. It goes without saying that the configuration and the like shown in the following description and the drawings can be changed as appropriate (including deletion of components). Moreover, in the following description, in order to make an understanding of this invention easy, description of a known technical matter is abbreviate | omitted suitably.

  The display processing system 1 according to the present embodiment is mounted on a vehicle such as an automobile or a motorcycle. The display processing system 1 includes a display processing device 10 and an external unit 20 (an example of a notification device). The display processing device 10 is connected to the external unit 20.

  The display processing device 10 is a vehicle instrument. The display processing device 10 includes an operation unit 11, a control unit 12, and a display unit 13. In addition, the display processing device 10 includes other general elements (such as pointers) used for vehicle meters.

  The operation unit 11 is configured by an input device including a switch button and the like, receives an operation from the user, and supplies operation information having contents corresponding to the received operation content to the control unit 12. Note that the operation unit 11 may be disposed outside the display processing apparatus 10 and supply operation information to the control unit 12 from the outside.

  The control unit 12 is configured by a computer such as a microcomputer including a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), and various input / output ports. The control unit 12 controls the entire display processing apparatus 10. In the present embodiment, the processing performed by the control unit 12 is performed by the CPU performing processing according to the program recorded in the ROM. Note that the CPU appropriately uses data recorded in the ROM when performing processing. The control unit 12 may include other storage devices such as a flash memory instead of the ROM or the like or in addition to the ROM or the like. The program may be supplied to the control unit 12 via a network or recorded on a computer-readable storage medium.

  In addition to performing predetermined processing in response to operation information from the operation unit 11, the control unit 12 supplies the first electric signal (first signal) to the external unit 20, thereby controlling the operation of the external unit 20. In addition to the control, the second electric signal (second signal) supplied from the external unit 20 is received, and a predetermined display is performed on the display unit 13 in accordance with the second electric signal (details will be described later). ).

  The display unit 13 includes a light emitting element for a warning indicator and the like, and performs a predetermined display under the control of the control unit 12.

  The external unit 20 includes an ECU (Electronic Control Unit) 21 and various devices 22. The external unit 20 constitutes an ABS (Antilock Brake System).

  The ECU 21 includes, for example, a computer such as a microcomputer that operates according to a program, and controls various devices 22 and other elements (brake pedal, engine, etc.) of the vehicle. In particular, the ECU 21 receives various electrical signals from various devices 22 and other devices included in other elements (brake pedal, engine, etc.) of the vehicle, and based on the received electrical signals, the various devices 22 and other vehicles. Control the elements of The program may be recorded in advance in the storage unit of the ECU 21, or may be recorded on a computer-readable storage medium via a network and supplied to the control unit 12.

  The various devices 22 include devices such as a hydraulic control device, a solenoid valve, a caliper brake, a damper, and a speed sensor, for example. The ABS mode is set or not set in the ECU 21. When the ABS mode is set, when the ECU 21 receives an electric signal indicating that the brake pedal has been depressed more strongly than a certain reference (rapid braking) from the brake pedal, the ECU 21 controls the various devices 22 so that the various devices 22 receive the ABS. Enable continuous braking. Thus, when the ABS mode is set in the ECU 21, the external unit 20 functions as an ABS. When the ABS mode is not set, the ECU 21 does not perform the braking operation even if the electric signal is received from the brake pedal. At this time, since the ABS is normal, the external unit 20 normally stops its operation as an ABS. Setting / non-setting of the ABS mode to the ECU 21 is performed by a first electric signal from the control unit 12.

  Next, the operation in the display processing system 1 will be described.

  In the initial state, it is assumed that the ABS mode is set in the ECU 21. Further, the driver of the vehicle can set the ABS mode or not by operating the operation unit 11. When the driver of the vehicle desires not to operate the ABS, the driver of the vehicle operates the operation unit 11 to perform an operation for instructing to stop the operation of the ABS. The operation unit 11 supplies operation information having contents corresponding to the operation content to the control unit 12. When acquiring the operation information, the control unit 12 generates a signal (first electric signal) that designates that the ABS mode is not set, and supplies the signal to the ECU 21. When this signal is supplied to the ECU 21, the ABS mode is not set in the ECU 21. When the driver of the vehicle desires to operate the ABS again, the driver of the vehicle operates the operation unit 11 to perform an operation for instructing to resume the operation of the ABS. The operation unit 11 supplies operation information having contents corresponding to the operation content to the control unit 12. When acquiring the operation information, the control unit 12 generates a signal (first electric signal) that designates setting of the ABS mode and supplies the signal to the ECU 21. When this signal is supplied to the ECU 21, the ABS mode is set again in the ECU 21.

  Here, processing performed by the ECU 21 will be described. The ECU 21 includes a storage unit. The storage unit appropriately stores data used in the following processing, and the ECU 21 appropriately uses the data.

  The ECU 21 turns on the ignition switch of the vehicle, starts the operation of the ECU 21 and starts the following process, and turns off the ignition switch, ends the operation of the ECU 21 and ends the following process.

  Further, the ECU 21 receives electrical signals supplied from the various devices 22, sequentially analyzes the received electrical signals, and determines whether any of the devices of the various devices 22 is abnormal for each predetermined period. If there is an abnormality, the abnormality information indicating the abnormality and the type of abnormality is stored.

  In the present embodiment, the ECU 21 analyzes each electrical signal, and if any of the electrical signals corresponds to a signal that cannot be normal, an abnormality has occurred in a device that supplies the signal. Otherwise, it is determined that no abnormality has occurred in any of the devices. When it is determined that an abnormality has occurred, the ECU 21 stops the operation as an ABS (abnormal stop 1 or 2), similarly to when the ABS mode is not set.

  As a signal that cannot be normal, for example, an abnormal signal A that exceeds a predetermined threshold value and a current value that cannot be normal continues for a first predetermined period, and a voltage value or current value is substantially 0 (zero) for a second predetermined period There is an abnormal signal C indicating an abnormal signal B, a voltage value or a current value that cannot be normal (for example, a change exceeding a certain reference in a certain time interval).

  Note that when the voltage value or current value is 0, there is a case where the electric signal is not actually supplied, but even in such a case, the voltage value or current is not supplied. Since it can be considered that an electric signal having a value of 0 is supplied, the electric signal B is handled as being supplied.

  The ECU 21 measures a current value or a voltage value in each electric signal supplied from the various devices 22 sequentially in time series. The ECU 21 determines that the electrical signal corresponds to the abnormal signal A when the measured current value exceeds the predetermined threshold value at a certain time interval. The ECU 21 determines that the electrical signal corresponds to the abnormal signal B when the measured current value or voltage value is substantially 0 (including 0 completely) in a certain time interval. When the measured current value or voltage value changes beyond a certain reference at a certain time interval, it is determined that the electric signal corresponds to the abnormal signal C. When any of the electrical signals corresponds to the abnormality signals A to C, the ECU 21 generates abnormality information indicating that there is an abnormality and which abnormality signal corresponds (abnormality type). Remember.

  In addition, when the signal which cannot be usually is the electric signal A, the circuit of the apparatus which supplies the signal may be partially short-circuited. When the signal that cannot normally be the electric signal B, the device that supplies the signal may not function at all, or the connection line between the ECU 21 and the device may be broken. When the signal that cannot normally be the electrical signal C, the operation of the device that supplies the signal may be abnormal.

  Next, the second electric signal supply process performed by the ECU 21 in parallel with the above-described determination process of whether or not an abnormality has occurred will be described with reference to FIG.

  The ECU 21 determines whether the abnormality information is stored (step S101). If the abnormality information is not stored (step S101; NO), the ECU 21 subsequently determines whether the ABS mode is set (step S103). . In this case, no abnormality has occurred in any of the various devices 22.

  When the ECU 21 determines that the ABS mode is set for itself (step S103; YES), the ECU 21 generates a PWM (Pulse Width Modulation) signal A (second electric signal) having a pulse width A as the second electric signal. Then, the supply is started (step S105). Thereafter, the ECU 21 continues to supply the PWM signal A to the control unit 12 until another PWM signal is generated and output. Further, when the ECU 21 has already supplied the PWM signal A to the control unit 12, the ECU 21 skips step S105.

  When the ECU 21 determines that the ABS mode is not set for itself (step S103; NO), the ECU 21 starts generating and supplying the PWM signal B (second electric signal) having the pulse width B to the control unit 12. (Step S104). Thereafter, the ECU 21 continues to supply the PWM signal B to the control unit 12 until another PWM signal is generated and output. Further, when the ECU 21 has already supplied the PWM signal B to the control unit 12, the ECU 21 skips step S104.

  When the abnormality information is stored (step S101; YES), the ECU 21 generates a PWM signal having a pulse width corresponding to the type of abnormality included in the abnormality information and supplies the PWM signal to the control unit 12 (step S102). . For example, when the abnormality type indicates that the electric signal corresponds to the abnormal signal C (that is, when the abnormal signal corresponds to abnormal stop 1), the ECU 21 performs the PWM signal C (second electric signal) having the pulse width C. ) Is supplied to the control unit 12 and indicates that the electrical signal corresponds to the abnormal signal A or B (that is, corresponds to the abnormal stop 2), the PWM signal D having the pulse width D (the second Electric signal) is supplied to the control unit 12. Note that, when there are abnormalities in a plurality of devices among the various devices 22 and the types of abnormalities are different, one type of PWM signal is generated and supplied to the control unit 12 according to a predetermined rule. For example, the PWM signal is generated according to the type of abnormality having a serious degree of abnormality. In the present embodiment, it is considered that the abnormality of the device is more serious when the electric signal corresponds to the abnormal signal A or B than when the electric signal corresponds to the abnormal signal C. When the signal indicates that it corresponds to the abnormal signals A and C, the PWM signal D having the pulse width D is generated, and the generated PWM signal D is supplied to the control unit 12. Thereafter, the ECU 21 continues to supply the PWM signal D to the control unit 12 until another PWM signal is generated and output. Further, when the ECU 21 has already supplied the control unit 12 with the same type of PWM signal that is to be generated and supplied to the control unit 12, the ECU 21 skips step S102. For example, when the type of abnormality indicates that the electrical signal corresponds to the abnormal signal A or B and the PWM signal D has already been generated and supplied, step S102 is skipped.

  As described above, when an abnormality occurs in any of the various devices 22, the ECU 21 supplies the control unit 12 with the PWM signal C or D corresponding to the type of the abnormality. Further, the ECU 21 supplies the PWM signal A when the ABS mode is set and there is no abnormality in any of the various devices 22. Further, the ECU 21 supplies the PWM signal B when the ABS mode is not set and there is no abnormality in any of the various devices 22. Note that the pulse widths of the PWM signals A to D are all different from each other.

  Next, display processing performed by the control unit 12 will be described.

  The control unit 12 causes the display unit 13 to perform a different display depending on the type of PWM signal supplied from the ECU 21. For example, when the PWM signal A is supplied from the ECU 21, the control unit 12 turns off the light emitting element of the display unit 13. Further, the control unit 12 turns on the light emitting element of the display unit 13 when the PWM signal B is supplied from the ECU 21. In addition, when the PWM signal C is supplied from the ECU 21, the control unit 12 causes the light emitting element of the display unit 13 to blink at the first blinking cycle (first blinking). Further, when the PWM signal D is supplied from the ECU 21, the control unit 12 causes the light emitting element of the display unit 13 to blink at the second blinking cycle (cycle earlier than the first blinking cycle) (second blinking). ).

  Further, the control unit 12 determines whether or not the second electric signal corresponding to the first electric signal that designates setting or non-setting of the ABS mode is supplied from the ECU 21, and if not, Retransmit the first electrical signal. For example, if the PWM signal A is not supplied even though the control unit 12 has supplied the first electric signal designating setting of the ABS mode, the control unit 12 supplies the first electric signal again. Further, for example, if the PWM signal B is not supplied even though the control unit 12 supplies the first electric signal designating that the ABS mode is not set, the controller 12 supplies the first electric signal again. .

  In addition, the control unit 12 is supplied with a second electric signal whose voltage value or current value is substantially 0 (zero) for a predetermined period (in this case, the connection line between the ECU 21 and the control unit 12 is disconnected). In other words, the light emitting element of the display unit 13 is caused to blink at a third blinking period (a period different from the first and second blinking periods) (third blinking). Note that when the voltage value or current value is 0, there is a case where the electric signal is not actually supplied, but even in such a case, the voltage value or current is not supplied. Since it can be considered that an electric signal having a value of 0 is supplied, the second electric signal is handled as being supplied from the ECU 21. The second electrical signal in this case can be regarded as a PWM signal (Low signal) E having a duty ratio of 0% (that is, a pulse width E having a pulse width of 0).

  As described above, the external unit 20 supplies a PWM signal corresponding to its own state (including disconnection from the control unit 12) to the display processing device 10, and the supplied display processing device 10 receives the PWM signal. The display processing device 10 can notify the driver of the state of the external unit 20 (including disconnection from the control unit 12).

  In the present embodiment, the display processing apparatus 10 having the above-described configuration is received by the signal receiving means (in this case, the control unit 12) that receives a signal indicating the state of the external unit 20 (external apparatus) and the signal receiving means. Display processing means (in this case, the control unit 12) that causes the display unit 13 to display a display mode according to the signal. In the display processing means, the second signal indicates a normal stop state of the external unit 20 (ABS) (that is, a state where the ABS is normal but is stopped by the designation of a user such as a driver). Abnormal stop indicating a normal stop signal (here, PWM signal B) or a stop state due to an abnormality of the external unit 20 (ABS) (that is, a state where the device constituting the ABS is stopped due to an abnormality) Depending on the signal (here, PWM signal C or D), the display mode (in this case, lighting or blinking state) is changed. As a result, a display corresponding to the type of stop state (abnormal stop or normal stop) of the external unit 20 (ABS) can be performed. Accordingly, a user such as a driver can check whether the external unit 20 is in an abnormal stop or a normal stop.

  The normal stop signal is a first PWM signal having a first pulse width (here, PWM signal B), and the abnormal stop signal is a second PWM having a pulse width different from the first pulse width. Since it is a signal (here, PWM signal C or D), the type of stop state can be easily understood by analyzing the pulse width of the PWM signal.

  The signal (second electric signal) includes a disconnection signal (here, PWM signal E) indicating disconnection with the external unit 20, and the display processing means is configured to display the signal as the normal stop signal. Or the abnormal stop signal or the disconnection signal, the display mode (lighting, blinking, etc.) is changed, so that the user can be in an abnormal stop state, a normal stop state, a disconnection state, or a disconnection state. You can tell which state is.

  The abnormal stop signal has a plurality of types (here, PWM signals C or D) according to the type of abnormality (abnormal stop 1 or abnormal stop 2), and the plurality of types of abnormal stop signals are PWM signals having different pulse widths. Since the display processing unit changes the display mode (flashing cycle) according to the pulse width of the PWM signal, the user can further distinguish the abnormal stop state.

  In the present embodiment, the display processing apparatus 10 having the above-described configuration causes the external unit 20 to supply a first signal that specifies the state of the external unit 20 (here, the control unit 12), an external unit 20 The signal supply device includes signal receiving means (in this case, the control unit 12) that receives a second signal representing the state of the unit 20. Then, the signal supply means re-enters the first signal when the state designated by the first signal supplied by the signal supply means is different from the state represented by the second signal received by the signal reception means. Since the signal is supplied to the external unit 20, when the operation state of the external device is designated, it is possible to cope with the case where the external device is not in the same operation state.

  In the present embodiment, the external unit 20 is a signal supply device that supplies a signal representing the state of the external unit 20 to the outside by the above configuration. When a PWM signal (here, a PWM signal A or B) is supplied to the display processing device 10 and the state of itself is abnormal, a PWM signal (here, a pulse width different from the predetermined PWM signal). Control means (ECU 21 in this case) for supplying the PWM signal C or D) to the display processing device 10 is provided. Thereby, a plurality of different states (abnormal or normal states) can be notified to an external device.

  The present invention can be applied not only to an ABS but also to a system that transmits control contents to an external unit and receives and displays the state of the control contents. Further, according to the resolution or identification capability of the control unit 12, the types of abnormalities are classified finely, the types of indicator blinking operations are increased by increasing the types of PWM signals, and the types of abnormalities etc. are reported to the user in detail. May be. It is possible to realize multiple functions equivalent to multiplex communication without implementing dedicated hardware, such as coding and transmitting multiple information and having fail-safe processing, and it can be applied to inexpensive display devices for vehicles. Is possible. Further, the display unit 13 may be configured by an LCD or the like, and in this case, the state of the external unit 20 may be displayed in a display form such as display by characters. In this case, the display mode is changed by displaying the state with characters, icons, and the like.

DESCRIPTION OF SYMBOLS 1 Display processing system 10 Display processing apparatus 11 Operation part 12 Control part 13 Display part 20 External unit 21 ECU
22 Various devices

Claims (6)

Signal receiving means for receiving a signal representing the state of an external device;
Display processing means for causing a display unit to display a display mode according to the signal received by the signal receiving means,
The signal includes a normal stop signal indicating a normal stop state, or an abnormal stop signal indicating a stop state due to an abnormality,
The display processing means makes the display mode different depending on whether the signal is the normal stop signal or the abnormal stop signal.
A display processing device. The normal stop signal is a first PWM signal having a first pulse width,
The abnormal stop signal is a second PWM signal having a pulse width different from the first pulse width.
The display processing apparatus according to claim 1. The signal includes a disconnection signal representing a disconnection with the external device,
The display processing means makes the display mode different depending on whether the signal is the normal stop signal, the abnormal stop signal, or the disconnection signal.
The display processing apparatus according to claim 1, wherein the display processing apparatus is a display processing apparatus. There are a plurality of abnormal stop signals depending on the type of abnormality,
The plural types of abnormal stop signals are PWM signals having different pulse widths,
The display processing means varies the display mode according to the pulse width of the PWM signal.
The display processing apparatus according to claim 1, wherein the display processing apparatus is a display processing apparatus. Signal supply means for supplying a first signal for designating a state of the external device to an external device;
Signal receiving means for receiving a second signal representing the state of the external device;
With
The signal supply means is configured to output the first signal again when a state specified by the first signal supplied from the signal supply means is different from a state indicated by the second signal received by the signal reception means. To the external device,
A signal supply device. A signal supply device that supplies a signal representing its own state to the outside,
When the own state is normal, a predetermined PWM signal is supplied to the outside, and when the own state is abnormal, a PWM signal having a pulse width different from that of the predetermined PWM signal is supplied. Comprising control means for supplying to the outside,
A signal supply device.

Images