CN108873747B - Double inflation signal control method for new energy passenger car - Google Patents
Double inflation signal control method for new energy passenger car Download PDFInfo
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- CN108873747B CN108873747B CN201810638794.2A CN201810638794A CN108873747B CN 108873747 B CN108873747 B CN 108873747B CN 201810638794 A CN201810638794 A CN 201810638794A CN 108873747 B CN108873747 B CN 108873747B
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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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
Abstract
The invention discloses a double inflation signal control method for a new energy bus, and relates to the technical field of intelligent control of buses. The control method comprises the following steps: (1) receiving data, acquiring a first path of air pressure signal and a second path of air pressure signal, and performing data filtering to obtain an air pressure value; (2) judging whether the first path air pressure value and the second path air pressure value are within a normal threshold value range K1, if so, turning to the step (3), otherwise, turning to the step (4); (3) comparing whether the ratio of the first path air pressure value to the second path air pressure value is within a threshold range K2, if not, turning to the step (5); (4) judging whether the air pressure value of the first path or the second path is not within a threshold value K1; (5) detecting whether the first and second path of air pressure values are continuously the same value; (6) and after the whole vehicle is electrified again, the first fault position and the second fault position are set to be zero. The invention selects the signal with normal or approximate normal value as the air pressure value of the whole vehicle through signal processing and logic judgment, and has higher accuracy and reliability.
Description
Technical Field
The invention relates to the technical field of intelligent control of passenger cars, in particular to a double inflation signal control method for a new energy passenger car.
Background
In recent years, the development of the new energy bus industry is planned by the nation, and the development of the whole industry presents a rapid situation. Therefore, the safety and intelligence of the new energy bus face further upgrading. The inflating pump is an important device of a new energy passenger car, is a source for supplying air pressure to the whole car, and is an important part for guaranteeing brake effectiveness. In order to increase safety, some vehicles are provided with two air pressure sensors at the front air passage and the rear air passage to detect air pressure signals, so that the detection of the air pressure of the whole vehicle and the control of the work of the inflating pump need to be further optimized.
At present, a double-inflation signal processing method is simple, and mainly comprises the steps of judging whether two paths of air pressure values are in a normal range or not, and judging that the inflation signal has a fault if the two paths of air pressure values are out of the normal range, so that the inflation work is stopped and the vehicle is stopped. The signal processing method has low reliability, and cannot judge which one of the two inflation signals is a normal value and carry out corresponding processing and switching.
Disclosure of Invention
The invention aims to solve the technical problem that the existing signal processing method is low in reliability and cannot judge which one of two inflation signals is a normal value and carry out corresponding processing and switching, and provides a double inflation signal control method for a new energy bus.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a double inflation signal control method for a new energy bus, which comprises the following steps of:
(1) data receiving, namely acquiring a first path of Air pressure signal and a second path of Air pressure signal, and performing data filtering processing to obtain Air pressure values Air _ pressure1 and Air _ pressure 2;
(2) judging whether the first and second Air pressure values Air _ pressure1 and Air _ pressure2 are within a normal threshold range K1, if so, turning to the step (3), otherwise, turning to the step (4);
(3) comparing whether the ratio of the first Air pressure value Air _ pressure1 to the second Air pressure value Air _ pressure2 is within a threshold value range K2, if so, starting inflation by using the lower value of the first Air pressure value and the second Air pressure value, stopping inflation by using the lower value of the first Air pressure value and the second Air pressure value, taking the average value of the first Air pressure value and the second Air pressure value as the Air pressure value of the whole vehicle, and if not, turning to the step (5);
(4) judging whether the air pressure value of the first path or the second path is not within a threshold value K1, if so, taking the air pressure value of the second path as the air pressure value and setting a first fault position; if the first path is the second path, the first path value is used as an air pressure value, and a second fault position is set; if the two paths are not in the threshold range, setting fault positions of the two paths;
(5) detecting whether the first and second Air pressure values Air _ pressure1 and Air _ pressure2 continuously take the same sample value, if so, taking a parameter which does not repeatedly take the same value as the Air pressure value, and if not, taking the average value of the two Air pressure values as the Air pressure value;
(6) and after the whole vehicle is electrified again, the first fault position and the second fault position are set to be zero.
As a further scheme of the present invention, in the step (1), after the first and second paths of Air pressure signals are acquired, three sets of data are averaged on the acquired signals to obtain the Air pressure processing values Air _ pressure1 and Air _ pressure 2.
As a further aspect of the present invention, in the step (2), when it is determined that both the first and second Air pressure values Air _ pressure1 and Air _ pressure2 are normal, it is determined whether the first and second fault bits are set, if yes, the fault reset count value is incremented by one, and when the fault reset count value reaches the limit value, the first and second fault flag bits are cleared.
As a further aspect of the present invention, in the normal threshold range K1 in step (2), the minimum value of K1 is the theoretical minimum value of the first and second air pressure signals plus the allowable deviation, and the maximum value is the theoretical maximum value of the first and second air pressure signals plus the allowable deviation.
As a further scheme of the present invention, in the step (4), when the first path air pressure value is determined not to be within the threshold value K1, the first fault bit count value is increased by one, and when the first fault bit count value reaches the limit value, the first fault bit is set; and adding one to the second fault position counting value when the second path of air pressure value is judged not to be within the threshold value K1, and setting the second fault position when the second fault position counting value reaches a limit value.
The invention has the beneficial effects that:
1. according to the double inflation signal control method for the new energy bus, whether the ratio of the two paths of air pressure signals is within the threshold range is judged by judging whether the two paths of air pressure signals are within the threshold range, and therefore the accuracy of the signals is improved; in the process of processing signals, the fault of the inflating signal is not directly judged, two fault positions are detected, and one fault position is selected as an actual air pressure value.
2. According to the invention, under the condition that the signal is not in the threshold range, the judgment on whether the two paths of signals continuously take the same value is added, so that under the condition that the air pressure sensor is abnormal or disconnected, the judgment method is helpful for detecting the position of the fault signal, and the normal operation of the vehicle inflation is ensured.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a double inflation signal control method for a new energy bus.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present embodiment provides a double inflation signal control method for a new energy bus, including the following steps:
after the vehicle control unit is powered on, the first fault bit and the second fault bit are reset, and the following steps are repeatedly executed within a fixed period of time.
The method comprises the steps of acquiring a first path of Air pressure signal and a second path of Air pressure signal through an Air pressure sensor, namely analog voltage, carrying out three groups of data averaging processing on the acquired signals, and carrying out data filtering processing as Air pressure processing values Air _ pressure1 and Air _ pressure2 to obtain processing values Air _ pressure1 and Air _ pressure2, and then entering a judging step (2).
It is determined whether the Air _ pressure1, Air _ pressure2 are within the threshold range. The minimum value of the threshold range is the sum of the theoretical minimum value of the first air pressure signal and the theoretical minimum value of the second air pressure signal and the allowable deviation value; the maximum value is the theoretical maximum value of the first and second air pressure signals plus the allowable deviation. Since the voltage values fed back by the different pressure sensors are different, this example is at a minimum of 0.498 and a maximum of 4.505.
The first and second fault bits indicate whether the first and second air pressure values have faults or not. When the first fault position and the second fault position are set, the corresponding gas circuit has a fault, and when the fault is zero, the fault does not exist. The fault reset count value indicates that if the Air _ pressure1 and the Air _ pressure2 recover to normal again when the first fault bit and the second fault bit are set, the fault reset count value is continuously increased by one within a period of time of continuing to be normal, and the first fault flag bit and the second fault flag bit are cleared when the fault reset count value reaches a limit value.
In the judgment (2), if the Air _ pressure1 is less than 0.498 or the Air _ pressure1 is more than 4.505, and the Air _ pressure2 is more than or equal to 0.498 and the Air _ pressure2 is less than or equal to 4.505, the Air _ pressure2 is used as a processing value, and the first fault position is set; if the Air _ pressure2 is less than 0.498 or the Air _ pressure2 is more than 4.505, and the Air _ pressure1 is more than or equal to 0.498, and the Air _ pressure1 is less than or equal to 4.505, the Air _ pressure1 is used as a processing value, and a second fault position is set; if both of the Air _ pressure1 and the Air _ pressure2 are less than 0.498 or greater than 4.505, the system is disabled and the first and second fault locations are set.
If both of Air _ pressure1 and Air _ pressure2 are greater than or equal to 0.498 and less than or equal to 4.505 in decision (2), go to (3).
In the judging step (3), whether the ratio of the Air _ pressure1 to the Air _ pressure2 is within a threshold value is judged, and the accuracy of the two paths of Air pressure values is further improved through the judgment. In this example, the threshold range for the ratio is 0.9-1.1. If the ratio is in the interval, the inflation starting is started by the lower value of the Air _ pressure1 and the Air _ pressure2, the inflation stopping is stopped by the lower value of the Air _ pressure1 and the Air _ pressure2, and the average value of the Air _ pressure1 and the Air _ pressure2 is used as the Air pressure value of the whole vehicle; if the ratio is not within the range of 0.9-1.1, the step (5) is carried out.
In the determination step (5), it is detected whether the first and second Air pressure values Air _ pressure1, Air _ pressure2 continuously take the same value, because in the case of abnormality or disconnection of the Air pressure sensor, the most common behavior is to continuously take the same value. By the method, the fault signal is detected, and therefore an error path of air pressure value is eliminated. If the same sample value is continuously taken, the parameter which does not repeatedly take the same value is taken as the Air pressure value, otherwise, because the two signals meet the conditions of the threshold values K1 and K2 in the previous judgment, the average value of the Air _ pressure1 and the Air _ pressure2 is taken as the Air pressure value on the premise of ensuring the safety and the reliability of the whole vehicle.
In summary, the invention further determines whether the ratio of the two paths of signals is within the threshold range by determining whether the two paths of air pressure signals are within the threshold range, thereby increasing the accuracy of the signals. In addition, in the process of processing signals, the fault of the inflating signal is not directly judged, two fault positions are detected, and one fault position is selected as an actual air pressure value. Furthermore, under the condition that the signals are not in the threshold range, the method also adds the step of judging whether the two paths of signals continuously take the same value. Under the condition that the air pressure sensor is abnormal or disconnected, the judgment method is helpful for detecting the fault signal and ensuring the normal operation of the vehicle inflating.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (4)
1. A double inflation signal control method for a new energy bus is characterized by comprising the following steps:
(1) data receiving, namely acquiring a first path of Air pressure signal and a second path of Air pressure signal, and performing data filtering processing to obtain Air pressure values Air _ pressure1 and Air _ pressure 2;
(2) judging whether the first and second Air pressure values Air _ pressure1 and Air _ pressure2 are within a normal threshold range K1, if so, turning to the step (3), otherwise, turning to the step (4);
in the step (2), when the first and second Air pressure values Air _ pressure1 and Air _ pressure2 are judged to be normal, whether the first and second fault positions are set is judged, if so, the fault reset count value is increased by one, and the first and second fault flag bits are cleared when the fault reset count value reaches a limit value;
(3) comparing whether the ratio of the first Air pressure value Air _ pressure1 to the second Air pressure value Air _ pressure2 is within a threshold value range K2, if so, starting inflation by using the lower value of the first Air pressure value and the second Air pressure value, stopping inflation by using the lower value of the first Air pressure value and the second Air pressure value, taking the average value of the first Air pressure value and the second Air pressure value as the Air pressure value of the whole vehicle, and if not, turning to the step (5);
(4) judging whether the air pressure value of the first path or the second path is not within a threshold value K1, if so, taking the air pressure value of the second path as the air pressure value and setting a first fault position; if the first path is the second path, the first path value is used as an air pressure value, and a second fault position is set; if the two paths are not in the threshold range, setting fault positions of the two paths;
(5) detecting whether the first and second Air pressure values Air _ pressure1 and Air _ pressure2 continuously take the same sample value, if so, taking a parameter which does not repeatedly take the same value as the Air pressure value, and if not, taking the average value of the two Air pressure values as the Air pressure value;
(6) and after the whole vehicle is electrified again, the first fault position and the second fault position are set to be zero.
2. The method according to claim 1, wherein in the step (1), after the first and second paths of Air pressure signals are collected, three groups of data are averaged to obtain the Air pressure processing values, namely, Air _ pressure1 and Air _ pressure2, of the collected signals.
3. The double inflation signal control method for the new energy passenger car according to claim 1, wherein in the step (2), the minimum value of the normal threshold range K1, K1 is a value obtained by adding an allowable deviation to the theoretical minimum value of the first and second air pressure signals, and the maximum value is a value obtained by adding an allowable deviation to the theoretical maximum value of the first and second air pressure signals.
4. The double inflation signal control method for the new energy passenger car according to claim 1, wherein in the step (4), when the first road air pressure value is judged not to be within the threshold value K1, the first fault bit count value is increased by one, and when the first fault bit count value reaches a limit value, the first fault bit is set; and adding one to the second fault position counting value when the second path of air pressure value is judged not to be within the threshold value K1, and setting the second fault position when the second fault position counting value reaches a limit value.
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| CN201810638794.2A CN108873747B (en) | 2018-06-20 | 2018-06-20 | Double inflation signal control method for new energy passenger car |
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| CN201810638794.2A CN108873747B (en) | 2018-06-20 | 2018-06-20 | Double inflation signal control method for new energy passenger car |
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| CN108873747B true CN108873747B (en) | 2020-10-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1982100A (en) * | 2005-12-12 | 2007-06-20 | 住友橡胶工业株式会社 | Method, apparatus and program for alarming abnormality in tire air-pressure |
| CN104842987A (en) * | 2015-04-01 | 2015-08-19 | 北京新能源汽车股份有限公司 | Vacuum booster system of electric automobile and pressure measurement method of system |
| CN105973605A (en) * | 2016-05-09 | 2016-09-28 | 西北工业大学 | Method for detecting whether air inlet channel of ramjet is started or not |
| CN106696937A (en) * | 2016-12-16 | 2017-05-24 | 浙江吉利新能源商用车有限公司 | Air brake system and air compressor start and stop control method based on air brake system |
| CN107588573A (en) * | 2017-09-04 | 2018-01-16 | 广东美的暖通设备有限公司 | Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4256824B2 (en) * | 2004-07-12 | 2009-04-22 | 住友ゴム工業株式会社 | Tire pressure drop alarm device and method, and tire decompression determination program |
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- 2018-06-20 CN CN201810638794.2A patent/CN108873747B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982100A (en) * | 2005-12-12 | 2007-06-20 | 住友橡胶工业株式会社 | Method, apparatus and program for alarming abnormality in tire air-pressure |
| CN104842987A (en) * | 2015-04-01 | 2015-08-19 | 北京新能源汽车股份有限公司 | Vacuum booster system of electric automobile and pressure measurement method of system |
| CN105973605A (en) * | 2016-05-09 | 2016-09-28 | 西北工业大学 | Method for detecting whether air inlet channel of ramjet is started or not |
| CN106696937A (en) * | 2016-12-16 | 2017-05-24 | 浙江吉利新能源商用车有限公司 | Air brake system and air compressor start and stop control method based on air brake system |
| CN107588573A (en) * | 2017-09-04 | 2018-01-16 | 广东美的暖通设备有限公司 | Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing |
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