CN111762114A - Method for realizing enhanced system mode management of combination instrument - Google Patents
Method for realizing enhanced system mode management of combination instrument Download PDFInfo
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- CN111762114A CN111762114A CN202010664680.2A CN202010664680A CN111762114A CN 111762114 A CN111762114 A CN 111762114A CN 202010664680 A CN202010664680 A CN 202010664680A CN 111762114 A CN111762114 A CN 111762114A
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- voltage
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- power supply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
Abstract
The invention relates to a method for realizing mode management of an enhanced system of a combination instrument, which is divided into the following sub-modes: the system voltage normal mode D1-1, the system voltage under-voltage mode D1-2, the system voltage severe under-voltage mode D1-3 and the system voltage over-voltage mode D1-4, the method comprises the following steps: and entering an ON sub-mode, and switching between the four sub-modes according to the current value of the system voltage and the combination of a voltage threshold value. The invention discloses a method for realizing the mode management of an enhanced system of a combination meter, and aims to solve three problems caused by undervoltage and overvoltage in a D1 mode (an ignition lock signal ON gear mode). The invention enhances the capability of preventing interference, avoids error indication, reduces the interference of the self to other modules and increases the self-protection capability.
Description
Technical Field
The invention relates to the field of automotive electronics, in particular to the technical field of automotive electronic control, and specifically relates to a method for realizing mode management of an enhanced system of a combination instrument.
Background
Along with the rapid development of the automobile electronic field, more and more electronic modules are arranged on the whole automobile, more and more functions are carried by each electronic module, the combination instrument is used as an important human-computer interaction platform, the functions are continuously increased, for example, more than one hundred indicating lamps are arranged, when the indicating and displaying function is realized, the accuracy and the reliability of indicating and displaying are ensured, otherwise, wrong indicating and displaying can cause wrong judgment to a driver, and the driving safety is influenced.
The combination instrument is one of the electronic modules on the whole vehicle, and CAN not cause interference to other modules while finishing the work of the combination instrument, for example, a wrong frame on a CAN bus CAN cause abnormal communication of other modules. Meanwhile, the self-protection capability is enhanced when some external conditions are abnormal, for example, when the system voltage is abnormal, the self-protection device is not damaged by abnormal voltage.
In the prior art, as shown in table 1, a combination meter divides a mode into 5 modes, namely D1-D5, according to an ignition lock key signal gear, an external hard wire wake-up source state and a sleep acknowledgement bit ACK in a CAN network management message.
TABLE 1 Definitions of Prior Art modes D1-D5
As shown in the conventional mode transition diagram of FIG. 1, the flow relationships and transition conditions between the modes D1-D5 are shown.
The problem in the D1 mode (ignition lock signal ON gear mode) is that:
firstly, when the system voltage is too low and is in an undervoltage [9V, 16V) state, the state acquired by the hard-line signal becomes unreliable due to too low voltage, so that an indicator lamp lighted according to the hard-line signal can be lighted by mistake;
when the system voltage is too low and is in a serious undervoltage (below 9V) state, the CAN network message sent out by the instrument CAN also cause the occurrence of error frames on the bus;
and thirdly, when the system voltage is over-high and is in an overvoltage [32V, 36V ], if the LED lamp and the buzzer work continuously, the related printed circuit board circuit and components can be damaged.
The reason that the hard-line switching value signals cannot be accurately acquired under 16V is as follows: the schematic diagram of the hard-wire signal acquisition circuit is shown in fig. 2, when the ignition voltage is 24V, the voltage of the chip acquisition end is 3.9V through the voltage division circuit; when the ignition voltage is reduced to 16V, the voltage of the chip acquisition end is 2.6V through the voltage division circuit; if the ignition voltage is reduced to be lower than 16V, the voltage of the chip acquisition terminal is smaller than 2.5V through the voltage division circuit, the chip with the voltage smaller than 2.5V can be identified to be low level (at the moment, the hard wire signal is not really set low), and the false triggering of the low-level effective hard wire control lamp is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for realizing the mode management of the enhanced system of the combination instrument, which has the advantages of strong anti-interference capability, simple and convenient operation and wider application range.
In order to achieve the above object, the method of the present invention for implementing the enhanced system mode management of a cluster tool is as follows:
the method for realizing the mode management of the enhanced system of the combination instrument is mainly characterized in that the enhanced system mode of the combination instrument comprises an ignition lock key signal ON mode which is divided into the following sub-modes: the system voltage normal mode D1-1, the system voltage under-voltage mode D1-2, the system voltage severe under-voltage mode D1-3 and the system voltage over-voltage mode D1-4, the method comprises the following steps:
and entering an ON sub-mode, and switching between the four sub-modes according to the current value of the system voltage and the combination of a voltage threshold value.
Preferably, the steps specifically include the following processing procedures:
(1) collecting system power supply voltage, judging whether the system power supply voltage is more than or equal to 16V and less than 32V, and if so, entering a system voltage normal mode D1-1; otherwise, continuing the step (2);
(2) judging whether the system power supply voltage is more than or equal to 9V and less than 16V, if so, entering a system voltage under-voltage mode D1-2; otherwise, continuing the step (3);
(3) judging whether the system power supply voltage is below 9V, if so, entering a system voltage serious undervoltage mode D1-3; otherwise, continuing the step (4);
(4) judging whether the system power supply voltage is greater than or equal to 32 and smaller than 36V, and if so, entering a system voltage overvoltage mode D1-4; otherwise, continuing the step (5);
(5) and (4) continuing to perform real-time circulating judgment in the step (1).
Preferably, under the system voltage under-voltage mode D1-2, the system locks the hard-line signal switching value collection, the state value is not changed, and the value under the voltage normal state is maintained.
Preferably, under the severe undervoltage mode D1-3 of system voltage, the system locks hard-line signal switching value acquisition and stops sending out all CAN messages.
Preferably, in the system voltage overvoltage mode D1-4, the system is in an overvoltage state, and all outputs are turned off for 1 second.
Preferably, the voltage threshold is 0.5V.
The invention discloses a method for realizing the mode management of an enhanced system of a combination meter, and aims to solve three problems caused by undervoltage and overvoltage in a D1 mode (an ignition lock signal ON gear mode). When the system voltage is too low and is in an undervoltage [9V, 16V) state, the state acquired by the hard-wired signal becomes unreliable due to too low voltage, so that an indicator lamp lighted according to the hard-wired signal may be lighted by mistake. When the system voltage is too low and is in a serious undervoltage (below 9V) state, the CAN network message sent out by the instrument CAN also cause the occurrence of error frames on the bus. When the system voltage is too high and is in an overvoltage [32V, 36V ], if the LED lamp and the buzzer continuously work, the related printed circuit board circuit and components can be damaged. The invention enhances the capability of preventing interference, avoids error indication, reduces the interference of the self to other modules and increases the self-protection capability.
Drawings
Fig. 1 is a schematic diagram of mode conversion in the prior art.
Fig. 2 is a schematic diagram of a hard-wired signal acquisition circuit in the prior art.
Fig. 3 is a schematic diagram illustrating the determination of the ignition lock signal ON-level mode for the first time in the method for implementing the enhanced system mode management of the combination meter according to the present invention.
Fig. 4 is a schematic diagram illustrating the flow between the sub-modes of the ignition lock signal ON gear of the method for implementing the mode management of the enhanced system of the combination meter according to the present invention.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
The invention discloses a method for realizing the mode management of an enhanced system of a combination meter, wherein the enhanced system mode of the combination meter comprises the following sub-modes of an ignition lock key signal ON mode: the system voltage normal mode D1-1, the system voltage under-voltage mode D1-2, the system voltage severe under-voltage mode D1-3 and the system voltage over-voltage mode D1-4, the method comprises the following steps:
and entering an ON sub-mode, and switching between the four sub-modes according to the current value of the system voltage and the combination of a voltage threshold value.
The steps specifically comprise the following processing procedures:
(1) collecting system power supply voltage, judging whether the system power supply voltage is more than or equal to 16V and less than 32V, and if so, entering a system voltage normal mode D1-1; otherwise, continuing the step (2);
(2) judging whether the system power supply voltage is more than or equal to 9V and less than 16V, if so, entering a system voltage under-voltage mode D1-2; otherwise, continuing the step (3);
(3) judging whether the system power supply voltage is below 9V, if so, entering a system voltage serious undervoltage mode D1-3; otherwise, continuing the step (4);
(4) judging whether the system power supply voltage is greater than or equal to 32 and smaller than 36V, and if so, entering a system voltage overvoltage mode D1-4; otherwise, continuing the step (5);
(5) and (4) continuing to perform real-time circulating judgment in the step (1).
In the preferred embodiment of the present invention, in the system undervoltage mode D1-2, the system lock hard-line signal switching value is collected, the state value is not changed, and the value in the voltage normal state is maintained.
As a preferred embodiment of the present invention, in the case of the system voltage severe undervoltage mode D1-3, the system locks the hard-line signal switching value acquisition and stops sending out all CAN messages.
In the preferred embodiment of the present invention, in the system voltage overvoltage mode D1-4, the system is in an overvoltage state, and all outputs are turned off for 1 second.
In a preferred embodiment of the present invention, the voltage threshold is 0.5V.
In the embodiment of the invention, the D1 mode in the state of the key signal ON gear of the meter ignition lock is subdivided into 4 sub-modes.
When the system power supply voltage is too low, the purpose of preventing interference is achieved through the limitation on the collection of the hard wire signal switching value.
When the system power supply voltage is seriously too low, the instrument module does not cause interference to other electronic modules by limiting partial functions of the instrument module.
When the system power supply voltage is over-voltage, the purpose of self-protection is achieved by limiting the partial functions of the system power supply voltage.
The invention provides a method for managing enhanced system modes of a combination meter, which comprises the following steps: by monitoring the index of the system power supply voltage in real time, the modes in the state of the D1 mode (ignition lock key signal ON gear mode) are subdivided, and as shown in the table 2, the ignition lock signal ON gear mode subdivision definition table is divided into: d1-1 (system voltage normal mode), D1-2 (system voltage under-voltage mode), D1-3 (system voltage severe under-voltage mode) and D1-4 (system voltage over-voltage mode).
TABLE 2 ON-gear mode subdivision definition table for ignition lock signal
As shown in fig. 3, as shown in the schematic diagram for determining the first entering of the ignition lock signal ON-shift sub-mode, the corresponding sub-mode is entered according to the current value of the system voltage:
step 1, when the system power supply voltage AD is collected and judged to be in a range of [16V, 32V ], entering a D1-1 (system voltage normal mode);
step 2, when the system power supply voltage AD is collected and judged to be in the range of [9V, 16V ], entering D1-2 (system voltage under-voltage mode);
step 3, when the system power supply voltage AD is collected and judged to be in the range (below 9V), entering D1-3 (a system voltage serious undervoltage mode);
step 4, when the system power supply voltage AD is collected and judged to be in the range of [32V, 36V ], entering D1-4 (system voltage overvoltage mode);
and 5, returning to the system power supply voltage acquisition judgment part again after the steps 1-4, and continuing real-time circulating judgment.
As shown in the schematic diagram of the transition between the sub-modes of the ignition lock signal ON gear of fig. 4, after the ON gear sub-mode is entered, the four sub-modes are transitioned to each other according to the current value of the system voltage and in combination with the threshold value of 0.5V (eliminating frequent mode switching caused by system voltage fluctuation).
The invention subdivides a D1 mode (an ignition lock signal ON gear mode) under the state of an ignition lock key signal ON gear by collecting and monitoring the system power supply voltage in real time, plays the roles of interference prevention and self protection by limiting partial functions under each sub mode, and provides a more complete mode management solution for a combined instrument system by matching with the prior art (monitoring the state of the ignition lock signal, monitoring an external hard wire awakening source, monitoring a dormancy acknowledgement bit ACK in a CAN network management message, and dividing the mode into five modes according to the monitoring results of the three modes).
The D1-1 (system voltage is normal) sub-mode under the state of an ignition lock key signal ON gear, the system is stable, and all functions of signal acquisition of a hard wire connector of the combination instrument, indication of an indicator light, indication of a head of a stepping motor, CAN message outgoing and the like are normally operated.
In the D1-2 (system voltage under-voltage) sub-mode in the state of the ignition lock key signal ON gear, the state of a system acquisition circuit is not stable any more, a hard wire signal switching value acquisition circuit is not reliable any more, the acquisition operation is locked at the moment, the state value is not changed any more, and the value in the voltage normal state is maintained.
In a D1-3 (system voltage is seriously undervoltage) sub-mode under the state of an ignition lock key signal ON gear, the state of a system acquisition circuit and the state of a CAN module circuit are not stable any more, and the acquisition and locking of a hard wire signal switching value are realized; and stopping all CAN messages from being sent out.
And in the sub-mode of D1-4 (system voltage overvoltage) in the state of an ignition lock key signal ON gear, the system is in an overvoltage state, partial functions are required to be cut off by self, so that the purpose of self protection is achieved, and when the sub-mode is entered and lasts for 1 second, all outputs are closed.
After entering a D1-4 (system voltage overvoltage) sub-mode in an ON gear state of an ignition lock key signal, in order to prevent the cyclic switching of output functions of closing- > opening- > closing- > opening caused by voltage fluctuation, a strategy of closing all outputs after lasting for 1 second is added in the project implementation process.
After entering a D1-4 (system voltage overvoltage) sub-mode in an ignition lock key signal ON gear state, a strategy of increasing a 0.5V threshold value is adopted for switching among the sub-modes, so that frequent mode switching caused by system voltage fluctuation can be eliminated.
The D1-1 (system voltage is normal) sub-mode of the ignition lock key signal in the ON gear state ensures that the full function of the instrument is performed under the condition that the system power supply voltage is normal and stable, and the consequences of indicating lamp error indication, CAN bus error frame and the like CAN not be caused;
according to the D1-2 (system voltage under-voltage) sub-mode in the state of the ignition lock key signal ON gear, the operation of hard wire signal switching value acquisition is not performed blindly, and the reliability of an acquisition value is ensured;
according to the D1-3 (system voltage is seriously undervoltage) sub-mode under the state of the ignition lock key signal ON gear, the CAN message is not sent out blindly, so that other electric nodes ON the whole vehicle are prevented from being interfered;
the D1-4 (system voltage overvoltage) sub-mode of the ignition lock key signal ON gear state enables the instrument to have a self-protection function so as to prevent self components and circuits from being damaged in an overvoltage state.
The invention takes a 7 inch screen automobile combination instrument as a specific embodiment, before the instrument is implemented, the system power voltage is reduced to be below 9V, and error frames appear on a CAN bus; when the system power supply voltage is in a range of 9-16V and the switch quantity of the hard wire switch quantity state is controlled by the switch quantity, the accidental automatic lighting condition can occur under the condition that the switch quantity is not in the lighting state, so that the error indication is caused; when the system power supply voltage reaches above 32V, the buzzer circuit heats seriously under the condition that the buzzer continuously alarms; when the system power supply voltage reaches above 32V, the indicating lamp controls circuit components to heat seriously under the state that the indicating lamp is continuously lightened.
After the instrument is implemented, the error frame of the CAN bus is not sent out under the condition of serious undervoltage of a system power supply; the situation of error indication of the alarm lamp in an undervoltage state is improved; the overvoltage protection effect also reduces the damage of components; the problem of the abnormal state of the power supply voltage is solved, so that the faults and the repair parts are greatly reduced, and the user satisfaction is improved.
The invention discloses a method for realizing the mode management of an enhanced system of a combination meter, and aims to solve three problems caused by undervoltage and overvoltage in a D1 mode (an ignition lock signal ON gear mode). When the system voltage is too low and is in an undervoltage [9V, 16V) state, the state acquired by the hard-wired signal becomes unreliable due to too low voltage, so that an indicator lamp lighted according to the hard-wired signal may be lighted by mistake. When the system voltage is too low and is in a serious undervoltage (below 9V) state, the CAN network message sent out by the instrument CAN also cause the occurrence of error frames on the bus. When the system voltage is too high and is in an overvoltage [32V, 36V ], if the LED lamp and the buzzer continuously work, the related printed circuit board circuit and components can be damaged. The invention enhances the capability of preventing interference, avoids error indication, reduces the interference of the self to other modules and increases the self-protection capability.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (6)
1. A method for realizing the mode management of an enhanced system of a combination meter is characterized in that the enhanced system mode of the combination meter is divided into the following sub-modes: the system voltage normal mode D1-1, the system voltage under-voltage mode D1-2, the system voltage severe under-voltage mode D1-3 and the system voltage over-voltage mode D1-4, the method comprises the following steps:
and entering an ON sub-mode, and switching between the four sub-modes according to the current value of the system voltage and the combination of a voltage threshold value.
2. The method of claim 1, wherein the steps specifically include the following steps:
(1) collecting system power supply voltage, judging whether the system power supply voltage is more than or equal to 16V and less than 32V, and if so, entering a system voltage normal mode D1-1; otherwise, continuing the step (2);
(2) judging whether the system power supply voltage is more than or equal to 9V and less than 16V, if so, entering a system voltage under-voltage mode D1-2; otherwise, continuing the step (3);
(3) judging whether the system power supply voltage is below 9V, if so, entering a system voltage serious undervoltage mode D1-3; otherwise, continuing the step (4);
(4) judging whether the system power supply voltage is greater than or equal to 32 and smaller than 36V, and if so, entering a system voltage overvoltage mode D1-4; otherwise, continuing the step (5);
(5) and (4) continuing to perform real-time circulating judgment in the step (1).
3. The method of claim 1, wherein in the undervoltage system mode D1-2, the system locks hard-wired signal switching value collection, and maintains the voltage value in the normal state.
4. The method according to claim 1, wherein in the case of the severe undervoltage system voltage mode D1-3, the system locks the hard-wired signal switching value collection and stops sending out all CAN messages.
5. The method of claim 1, wherein in the system voltage over-voltage mode D1-4, the system is under over-voltage condition, and all outputs are turned off for 1 second.
6. The method of claim 1, wherein the voltage threshold is 0.5V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664680.2A CN111762114A (en) | 2020-07-10 | 2020-07-10 | Method for realizing enhanced system mode management of combination instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010664680.2A CN111762114A (en) | 2020-07-10 | 2020-07-10 | Method for realizing enhanced system mode management of combination instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113071437A (en) * | 2021-04-12 | 2021-07-06 | 上海赫千电子科技有限公司 | Power management method of intelligent host |
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| CN103043006A (en) * | 2012-12-20 | 2013-04-17 | 联合汽车电子有限公司 | Voltage control method of electronic controller of car body |
| CN103386934A (en) * | 2012-05-10 | 2013-11-13 | 航天信息股份有限公司 | Power supply device and power supply method of vehicle-mounted electronic device |
| CN104842799A (en) * | 2014-12-17 | 2015-08-19 | 北汽福田汽车股份有限公司 | Monitoring method, system and vehicle of power supply voltage of vehicle-mounted controller |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202083732U (en) * | 2010-12-31 | 2011-12-21 | 长城汽车股份有限公司 | Automobile meter with function of voltage monitoring |
| CN202319930U (en) * | 2011-10-19 | 2012-07-11 | 吉林省启明电子科技股份有限公司 | Automatic adjusting control device capable of switching off input voltage of automotive digital instrument |
| CN103386934A (en) * | 2012-05-10 | 2013-11-13 | 航天信息股份有限公司 | Power supply device and power supply method of vehicle-mounted electronic device |
| CN103043006A (en) * | 2012-12-20 | 2013-04-17 | 联合汽车电子有限公司 | Voltage control method of electronic controller of car body |
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Application publication date: 20201013 |