CN113485303A - EPS controller power supply relay actuation optimization control method and system - Google Patents
EPS controller power supply relay actuation optimization control method and system Download PDFInfo
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- CN113485303A CN113485303A CN202110828203.XA CN202110828203A CN113485303A CN 113485303 A CN113485303 A CN 113485303A CN 202110828203 A CN202110828203 A CN 202110828203A CN 113485303 A CN113485303 A CN 113485303A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005457 optimization Methods 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0267—Fault communication, e.g. human machine interface [HMI]
- G05B23/027—Alarm generation, e.g. communication protocol; Forms of alarm
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Abstract
The invention provides an EPS controller power supply relay suction optimization control method and system, which send a plurality of times of disconnection and suction instructions by adopting a retry optimization strategy, repeatedly try to perform repeated suction disconnection actions, remove frosting or foreign matters between contacts in the process of several times of actions, enable the relay to normally suck and conduct a power supply, and enable the controller to normally work, thereby realizing the function of repeatedly trying the suction disconnection actions in an ignition period until the relay contacts recover good contact. The invention solves the problem that the relay does not normally pull in according to the pull-in instruction when the relay is in poor contact caused by frosting or foreign matters. The invention reduces the fault probability that the controller can not work normally to output power assistance because the relay can not be attracted by one action in one ignition period.
Description
Technical Field
The invention belongs to the technical field of vehicle-mounted equipment, and particularly relates to an EPS controller power supply relay pull-in optimization control method and system.
Background
In the power-on initialization self-checking process of an EPS controller of an existing vehicle, the voltage of a point ignition power supply is detected firstly, then the voltage of a motor before a relay pull-in instruction is sent and the voltage of the rear end of a relay are detected, after the detection is passed, the pull-in instruction of the relay is sent again, whether the relay is pulled in is detected again, if the relay still does not meet the detection condition of the pull-in for a period of time, the transmission of the pull-in instruction is stopped, and the fault of the power supply relay is recorded.
The power supply circuit switched on by the relay has the problem that due to the mechanical characteristics of the power supply circuit, the contact points are poor in contact because of frosting under certain extreme weather conditions or impurities enter the power supply circuit during production and use. In a general processing mode, after the controller sends a relay pull-in instruction in the self-checking process, if the relay is found to be incapable of being normally pulled in all the time, the EPS cannot provide assistance in the ignition cycle. Under partial conditions, a driver repeatedly powers on and off the vehicle again, after a plurality of initial pull-in attempts, partial frost or impurities fall off after the contacts are pulled in and disconnected for a plurality of times, and the contacts can restore good contact.
However, the contact point which can be recovered by self is poor in contact, the vehicle needs to be repeatedly powered up and down again, and the EPS without power in a plurality of ignition cycles can cause poor use feeling for users.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method and the system are used for repeatedly trying to pull in and break off actions in an ignition period until the contact points recover good contact.
The technical scheme adopted by the invention for solving the technical problems is as follows: an EPS controller power supply relay actuation optimization control method comprises the following steps:
s1: electrifying and initializing, clearing all counters and carrying out preceding stage detection items;
s2: sending a relay pick-up instruction after the detection result of the step S1 is passed;
s3: after the waiting time Xms, judging whether the voltage Relay _ V at the rear end of the Relay meets the non-attraction condition every Tms, if so, judging that the Relay does not attract, and repeatedly executing the step within the duration Zms; if not, judging the relay to be closed, and resetting all counters;
s4: if the duration Zms judges that the relay is not attracted, the relay does not attract the counter to accumulate; sending a relay disconnection instruction, and accumulating a relay disconnection instruction counter;
s5: if the relay disconnection instruction counter is larger than or equal to D, the relay is kept disconnected, a relay actuation instruction is not sent any more, a fault alarm lamp is lightened, and a relay fault code is recorded;
if the relay opening instruction counter is less than D, sending a relay closing instruction after waiting for Yms, and executing step S3.
According to the scheme, in the step S1, the specific steps are as follows:
s11: detecting whether the positive voltage Power _ V of the storage battery is greater than a voltage threshold value M: if yes, a triode which is connected between the positive electrode of the storage battery and the relay coil in series is well conducted, and the relay coil is electrified; if not, the triode is not conducted, and the coil of the relay is powered off;
s12: and detecting the motor voltage before sending the Relay pull-in instruction and the Relay rear end voltage Relay _ V.
According to the scheme, in the step S3, the condition for judging that the relay is not attracted is as follows:
after a relay closing instruction is sent out, the relay completes closing within t1 longest; after the relay disconnection instruction is sent out, the relay completes the release within t2 longest; setting t3 & t2& & t3 & t1, wherein N is a voltage value, and the positive voltage of the storage battery is Power _ V;
if the duration time of (((Power _ V > Relay _ V + N) | (Relay _ V > Power _ V + N)) & (Power _ V > voltage threshold M)) is greater than or equal to t3, the Relay is judged not to be attracted.
According to the scheme, in the step S3, T is 4; x is 20; in step S5, Y is 10.
An EPS controller power supply relay pull-in optimization control system comprises a storage battery, a triode, a relay and a control module; the positive electrode of the storage battery is connected with the emitter of the triode, the collector of the triode is connected with one end of the relay coil, and the other end of the relay coil is grounded; the control end of the control module is connected with the base electrode of the triode and is used for controlling the on-off of the triode through a relay pull-in instruction and a disconnection instruction so as to control the pull-in and the disconnection of the relay; and the signal acquisition end of the control module is connected with the relay contact and used for judging whether the relay is closed or not by detecting the rear end voltage of the relay.
According to the scheme, the LED lamp also comprises a diode; the negative pole of the diode is connected with the collector of the triode, and the positive pole of the diode is grounded and used for preventing reverse connection.
A computer storage medium having stored therein a computer program executable by a computer processor, the computer program executing an EPS controller power relay pull-in optimization control method.
The invention has the beneficial effects that:
1. according to the method and the system for controlling the power supply relay suction optimization of the EPS controller, the repeated suction and disconnection actions are repeatedly tried by sending the disconnection and suction instructions for a plurality of times by adopting a retry optimization strategy, frosting or foreign matters among the contacts are removed in the action processes of a plurality of times, the relay is normally sucked and is powered on, the controller normally works, and the function of repeatedly trying the suction and disconnection actions in an ignition period until the contacts of the relay recover good contact is realized.
2. The invention solves the problem that the relay does not normally pull in according to the pull-in instruction when the relay is in poor contact caused by frosting or foreign matters.
3. The invention reduces the fault probability that the controller can not work normally to output power assistance because the relay can not be attracted by one action in one ignition period.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
FIG. 2 is a circuit diagram of Power _ V and Relay _ V according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2, the embodiment of the present invention includes a storage battery, a transistor, a diode, a relay, and a control module; the positive electrode of the storage battery is connected with the emitter of the triode, the collector of the triode is connected with one end of the relay coil, and the other end of the relay coil is grounded; the negative electrode of the diode is connected with the collector of the triode, and the positive electrode of the diode is grounded and used for preventing reverse connection; and a signal acquisition end of the control module is connected with a relay contact, and whether the relay is closed or not is judged by detecting the rear end voltage of the relay.
The invention detects whether the power supply relay can be normally closed according to the instruction requirement of the controller in the power-on initialization process. When the relay is detected not to be normally attracted according to the attraction instruction, a retry optimization strategy is adopted to send the opening and attraction instructions for a plurality of times, and repeated attraction and disconnection actions are repeatedly tried. When the frosting or poor contact caused by foreign matters occurs to the relay, the frosting or the foreign matters between the contacts can be removed in the process of several action attempts, so that the relay can still normally pull in and switch on the power supply finally, and the controller can normally work; and optimizing the fault occurrence probability that the controller cannot normally work to output boosting force because the relay cannot be attracted once in one ignition period. And after the retry optimization strategy is added, once the pull-in of the relay is detected, the retry optimization strategy is immediately stopped to prevent the relay from being repeatedly pulled in and disconnected all the time.
In the process of the retry optimization strategy, the condition detection of the pull-in of the relay is not carried out within the time of actively disconnecting the relay. After the pull-in of the relay is disconnected again and the pull-in reaches a certain number of times, the relay still can not be normally pulled in, the problem of non-frosting or contact impurities is considered, the problem cannot be solved by continuous retry, bad use experience is caused for avoiding the noise of the pull-in of the relay, and the relay does not try again.
Referring to fig. 1, the pull-in optimization control method for the power relay of the EPS controller of the invention comprises the following steps:
1. in the Power-on initialization self-detection process of the EPS controller, firstly detecting the voltage of an IG ignition Power supply (whether Power _ V is larger than a voltage threshold value M), then detecting the voltage of a motor before sending a relay pull-in instruction and the voltage of the rear end of the relay, sending the relay pull-in instruction after the detection is passed, and after waiting for Xms, detecting whether the voltage of the rear end of the relay meets the non-pull-in condition.
Hardware:
Power_V：
the voltage entering the controller from the positive pole of the storage battery passes through a diode and a triode and generates a slight voltage drop.
The conductivity of the triode is influenced by an IG signal, and when Power _ V is larger than a voltage threshold M, the triode can be well conducted;
Relay_V：
when the relay is not conducted, the voltage is 0V;
the voltage of Relay _ V should be close to the battery positive voltage when the Relay is on.
Power _ V is the same as Relay _ V sampling reference.
After a relay closing instruction is sent out, the relay completes closing within t1 longest;
after the relay release command is sent out, the relay completes the release within the time t2 at the longest.
Software:
1) and judging whether the Relay is attracted or not by comparing the Power _ V with the Relay _ V.
2) And (3) self-checking the system after power-on, namely checking the IG voltage, and then checking the motor voltage before sending a relay pull-in instruction and the relay rear end voltage, sending the relay pull-in instruction after the above item detection is passed, and subsequently judging the conditions in the item 3 every 4 ms.
3) And the duration t3 of ((Power _ V > Relay _ V + N) | (Relay _ V > Power _ V + N)) & (Power _ V > voltage threshold M)), the Relay is considered not to be attracted, and the 0 fault timer is cleared when attraction is judged at any time. Wherein t3 > t2& & t3 > t1, where N is the voltage value.
4) When a fault of a turn-off assisting level is detected, a relay turn-off instruction is sent, and whether the relay is closed or not is not detected any more.
2. If the relay does not attract after being judged for Zms, the relay does not attract the counter to accumulate, and the relay disconnection instruction counter is sent out, meanwhile, the relay disconnection instruction counter accumulates, the relay attracting instruction is sent out after the waiting time Yms, and whether the relay attracts is judged again after the waiting time Xms.
3. When the power-on initialization is carried out, the counters are all cleared
4. When the relay is detected to be successfully attracted, the counters are all reset
5. When the relay disconnection instruction counter is larger than or equal to XX (a constant value which can be confirmed according to requirements or actual calibration), a pull-in instruction is not sent any more, the relay disconnection instruction is kept, the fault alarm lamp is lightened, and the relay fault code is recorded.
The above embodiments are only used for illustrating the design idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes and modifications made in accordance with the principles and concepts disclosed herein are intended to be included within the scope of the present invention.
Claims (7)
1. A suction optimization control method for an EPS controller power supply relay is characterized by comprising the following steps: the method comprises the following steps:
s1: electrifying and initializing, clearing all counters and carrying out preceding stage detection items;
s2: sending a relay pick-up instruction after the detection result of the step S1 is passed;
s3: after the waiting time Xms, judging whether the voltage Relay _ V at the rear end of the Relay meets the non-attraction condition every Tms, if so, judging that the Relay does not attract, and repeatedly executing the step within the duration Zms; if not, judging the relay to be closed, and resetting all counters;
s4: if the duration Zms judges that the relay is not attracted, the relay does not attract the counter to accumulate; sending a relay disconnection instruction, and accumulating a relay disconnection instruction counter;
s5: if the relay disconnection instruction counter is larger than or equal to D, the relay is kept disconnected, a relay actuation instruction is not sent any more, a fault alarm lamp is lightened, and a relay fault code is recorded;
if the relay opening instruction counter is less than D, sending a relay closing instruction after waiting for Yms, and executing step S3.
2. The EPS controller power relay pull-in optimization control method according to claim 1, characterized in that: in the step S1, the specific steps are as follows:
s11: detecting whether the positive voltage Power _ V of the storage battery is greater than a voltage threshold value M: if yes, a triode which is connected between the positive electrode of the storage battery and the relay coil in series is well conducted, and the relay coil is electrified; if not, the triode is not conducted, and the coil of the relay is powered off;
s12: and detecting the motor voltage before sending the Relay pull-in instruction and the Relay rear end voltage Relay _ V.
3. The EPS controller power relay pull-in optimization control method according to claim 1, characterized in that: in step S3, the condition for determining that the relay is not pulled in is:
after a relay closing instruction is sent out, the relay completes closing within t1 longest; after the relay disconnection instruction is sent out, the relay completes the release within t2 longest; setting t3 & t2& & t3 & t1, wherein N is a voltage value, and the positive voltage of the storage battery is Power _ V;
if the duration time of (((Power _ V > Relay _ V + N) | (Relay _ V > Power _ V + N)) & (Power _ V > voltage threshold M)) is greater than or equal to t3, the Relay is judged not to be attracted.
4. The EPS controller power relay pull-in optimization control method according to claim 1, characterized in that: in the step S3, T is 4; x is 20; in step S5, Y is 10.
5. A system for the EPS controller power supply relay pull-in optimization control method of any claim 1 to 4, characterized in that: the device comprises a storage battery, a triode, a relay and a control module; the positive electrode of the storage battery is connected with the emitter of the triode, the collector of the triode is connected with one end of the relay coil, and the other end of the relay coil is grounded; the control end of the control module is connected with the base electrode of the triode and is used for controlling the on-off of the triode through a relay pull-in instruction and a disconnection instruction so as to control the pull-in and the disconnection of the relay; and the signal acquisition end of the control module is connected with the relay contact and used for judging whether the relay is closed or not by detecting the rear end voltage of the relay.
6. The system of claim 1, wherein: the LED also comprises a diode; the negative pole of the diode is connected with the collector of the triode, and the positive pole of the diode is grounded and used for preventing reverse connection.
7. A computer storage medium, characterized in that: the computer program is stored in the controller, and can be executed by a computer processor, and the computer program executes the power supply relay pull-in optimization control method of the EPS controller according to any one of claims 1 to 4.
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| CN202110828203.XA CN113485303B (en) | 2021-07-22 | 2021-07-22 | EPS controller power supply relay actuation optimization control method and system |
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| CN202110828203.XA CN113485303B (en) | 2021-07-22 | 2021-07-22 | EPS controller power supply relay actuation optimization control method and system |
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| CN113485303B CN113485303B (en) | 2022-09-13 |
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| CN110347143A (en) * | 2019-08-07 | 2019-10-18 | 中国核动力研究设计院 | Nuclear safe level preferred module scene drives output loop diagnostic system and method |
| CN112509864A (en) * | 2020-11-06 | 2021-03-16 | 联创汽车电子有限公司 | Relay control method and control structure thereof |
-
2021
- 2021-07-22 CN CN202110828203.XA patent/CN113485303B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007165406A (en) * | 2005-12-09 | 2007-06-28 | Nissan Motor Co Ltd | Apparatus and method for defrosting electromagnetic relay |
| CN201880711U (en) * | 2010-09-28 | 2011-06-29 | 勤威(天津)工业有限公司 | Air injection device for clearing foreign objects on surface of product |
| KR20120045318A (en) * | 2010-10-29 | 2012-05-09 | 한국전력공사 | An auxiliary relay for preventing adhesion |
| CN102956399A (en) * | 2011-10-21 | 2013-03-06 | 厦门市芯阳科技有限公司 | Method for eliminating adhesion of relay contact |
| CN203445063U (en) * | 2013-08-21 | 2014-02-19 | 广东易事特电源股份有限公司 | Circuit for preventing relay adhesion |
| EP3404432A1 (en) * | 2017-04-26 | 2018-11-21 | Contemporary Amperex Technology Co., Limited | Method and system for detecting relay adhesion |
| CN107017098A (en) * | 2017-06-20 | 2017-08-04 | 明光市三友电子有限公司 | A kind of relay cleaning device |
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| CN112509864A (en) * | 2020-11-06 | 2021-03-16 | 联创汽车电子有限公司 | Relay control method and control structure thereof |
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