CN113665359A - System and method for acquiring and processing speed signals of speedometer - Google Patents
System and method for acquiring and processing speed signals of speedometer Download PDFInfo
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- CN113665359A CN113665359A CN202111062666.6A CN202111062666A CN113665359A CN 113665359 A CN113665359 A CN 113665359A CN 202111062666 A CN202111062666 A CN 202111062666A CN 113665359 A CN113665359 A CN 113665359A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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Abstract
The invention discloses a system and a method for acquiring and processing a speed signal of a speedometer, wherein the system comprises an ABS control unit and a wheel speed sensor, the wheel speed sensor is used for acquiring a wheel speed signal of a wheel, the output end of the wheel speed sensor is connected with the ABS control unit, the ABS control unit calculates a speed signal according to the received wheel speed signal and then sends the speed signal to a combination instrument module, and the combination instrument processes the received data to obtain the speed signal and displays the speed signal. The invention has the advantages that: the vehicle-mounted ABS system is adopted to collect the vehicle speed signal, the hardware cost is not increased, the whole vehicle cost is greatly reduced, the product development period of the whole vehicle is shortened, the development cost is reduced, and the acquisition of the vehicle speed can be realized only by integrating control software in the ABS control unit; the collected vehicle speed data are analyzed and judged, and the accuracy and reliability of the vehicle speed are improved.
Description
Technical Field
The invention relates to the field of automobile running speed acquisition, in particular to an acquisition processing system and method for acquiring a speed signal by using an in-automobile ABS (anti-lock braking system).
Background
In the prior art, a turbine worm pulse signal acquired by a mileage sensor is input to an instrument, the instrument performs vehicle speed display through single chip microcomputer detection and operation conversion, the vehicle speed acquisition and processing mode needs to additionally increase the mileage sensor for signal acquisition and needs to increase a CAN chip for signal transmission, and the cost and the development period of a finished vehicle product are increased. With the upgrading of automobile regulations, the safety requirement is higher and higher, and the ABS has become the standard matching of the vehicle models of M1 and N1. The ABS is used as a standard configuration function on the whole vehicle, the self demand monitors the signals of four wheels of the vehicle in real time to reasonably distribute the braking force, and if the ABS system is used for collecting and processing the vehicle speed signals, the cost can be saved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for acquiring and processing a speed signal of a speedometer, which are used for acquiring and processing the speed signal through an ABS (anti-lock braking system) of a vehicle.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a collection processing system of speedometer speed signal, includes ABS control unit, fast sensor of wheel, and the fast sensor of wheel is used for gathering the fast signal of wheel, and ABS control unit is connected to its output, ABS control unit calculates according to the fast signal of wheel of receiving and sends for combination meter module after obtaining speed signal, combination meter processes the speed signal that obtains and demonstrates to the data that receive.
The wheel speed sensor and the gear ring are matched to generate an induced voltage signal, and the voltage signal is transmitted to the ABS control unit through a hard wire.
The ABS control unit is connected with the combination instrument in a hard wire connection mode and used for sending the vehicle speed signal to the instrument in a pulse signal mode.
After the combination instrument is powered on, the instrument pointer or the display screen value is controlled to rapidly move to the corresponding vehicle speed indicating position through the acquired pulse signal.
The number of the wheel speed sensors is four, the wheel speed sensors are respectively corresponding to the detection of wheel speed signals of four wheels, the ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and the final vehicle speed for displaying by the combination instrument is obtained by processing the four vehicle speed data.
A method for acquiring and processing a vehicle speed signal of a speedometer comprises the following steps:
after the vehicle is started, the wheel speed sensor and the gear ring are matched to generate an induced voltage signal, the voltage signal is transmitted to the ABS control unit through a hard wire, the ABS control unit processes, calculates and converts the induced voltage signal, and sends a corresponding pulse signal to the combination instrument speedometer through the hard wire according to a speed output coefficient agreed with the combination instrument, and the combination instrument processes and calculates the signal and displays the speed signal.
The number of the wheel speed sensors is four, the wheel speed sensors are respectively corresponding to the collection of wheel speed signals of four wheels, the ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and the final vehicle speed used for displaying by the combination instrument is obtained by processing the four vehicle speed data.
The ABS control unit judges the four pieces of vehicle speed data, if the deviation error among the four vehicle speeds is smaller than a set value, the four pieces of vehicle speed data are judged to be free of faults, and the vehicle speed data obtained by averaging the four pieces of vehicle speed data are used as the final vehicle speed data displayed by the combination instrument; if the deviation error among the four vehicle speeds is greater than a set value, the vehicle speed calculated by the wheel speed corresponding to the driving wheel is taken, the vehicle speed calculated by the driving wheel is judged, and if the deviation error among the vehicle speeds calculated by the driving wheel is greater than a second set value, the ABS control unit sends a vehicle speed abnormal alarm and sends a vehicle speed fault signal to the combination instrument for displaying; and if the deviation error between the vehicle speeds calculated by the driving wheels is smaller than a second set value, taking the average value of the vehicle speeds calculated by the driving wheels as the final vehicle speed data displayed by the combination instrument.
The invention has the advantages that: the vehicle-mounted ABS system is adopted to collect the vehicle speed signal, the hardware cost is not increased, the whole vehicle cost is greatly reduced, the product development period of the whole vehicle is shortened, the development cost is reduced, and the acquisition of the vehicle speed can be realized only by integrating control software in the ABS control unit; the collected vehicle speed data are analyzed and judged, and the accuracy and reliability of the vehicle speed are improved.
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The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of the acquisition system of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The invention mainly aims to realize the acquisition and calculation of the vehicle speed through a vehicle-mounted ABS system, thereby realizing the acquisition and calculation without adding a sensor and a can chip, realizing the chip reuse and saving the cost. The wheel speed sensor is adopted, so that the requirement problem of collecting vehicle speed signals under the condition that a mileage sensor is not additionally arranged and a whole vehicle does not have a CAN network is met. The signal of the wheel speed sensor is collected by utilizing the operation and control functions of the ABS controller, the operation is carried out, and the operation result is converted into a pulse signal so as to meet the pointer display function of the vehicle speedometer. According to the invention, a mileage sensor is not additionally arranged for signal acquisition, a CAN chip is not additionally arranged for signal transmission, and a combination instrument does not relate to new development when a main speed reducer or a gearbox is changed, so that the cost of the whole vehicle is greatly reduced, the product development cycle of the whole vehicle is shortened, the development cost is reduced, and the application of part platformization is promoted. The specific scheme is as follows:
the utility model provides a collection processing system of speedometer speed signal, includes ABS control unit, fast sensor of wheel, and fast sensor of wheel is used for gathering the fast signal of wheel, and ABS control unit is connected to its output, and ABS control unit calculates according to the fast signal of wheel of receiving and sends for the combination meter module after obtaining speed signal, and the combination meter is handled the data of receiving and is obtained speed signal and demonstrate. The wheel speed sensor and the gear ring are matched to generate an induced voltage signal, and the voltage signal is transmitted to the ABS control unit through a hard wire. The ABS control unit is connected with the combination instrument in a hard wire connection mode and used for sending the vehicle speed signal to the instrument in a pulse signal mode. After the combination instrument is powered on, the instrument pointer or the display screen value is controlled to quickly move to the corresponding vehicle speed indicating position through the collected pulse signal.
The ABS control unit is used for acquiring and analyzing signals of the wheel speed sensor by utilizing the functions of operation and control of the ABS control unit, performing operation, converting the operation result into a pulse signal and transmitting the pulse signal to the speedometer through a hard wire to realize the function of displaying the speed of the vehicle. The method specifically comprises the following steps: after the whole vehicle is started, the wheel speed sensor and the gear ring are matched to generate an induced voltage signal, the voltage signal is transmitted to the ABS control unit through a hard wire, the ABS control unit processes, calculates and converts the induced voltage signal, and sends a corresponding pulse signal to the combination instrument speedometer through the hard wire according to a speed output coefficient agreed with the combination instrument, and the combination instrument processes and calculates signals and displays the speed signal.
1. A wheel speed sensor: the corresponding pulse signals are output by measuring the wheel speed of the wheel and transmitted to the ABS control unit through a hard wire;
2. ABS control unit module: the ABS control unit calculates and converts a vehicle speed signal output by a wheel speed sensor into a pulse signal by a processor in combination with a tire rolling radius and a vehicle speed output coefficient, and sends the pulse signal through a hard line;
3. the combination instrument module: after the instrument is electrified, a pointer of the instrument rapidly moves to a corresponding position of a signal under different conditions through a vehicle speed indicating strategy, an ignition sampling strategy, a rotating speed sampling strategy, an electrified sampling strategy and an offline sampling strategy so as to meet the vehicle speed indicating function of the instrument;
the wheel speed signals detected by the wheel speed sensors of the wheels are converted into vehicle speed signals according to calculation, then the vehicle speed signals are sent to the instrument in a pulse signal mode, and the vehicle speed signals are converted into required vehicle speed indications after being acquired by the instrument. The hardware involved in the method is the hardware cost of the ABS or the vehicle-mounted instrument, the acquisition of the vehicle speed can be realized only by integrating software in the ABS control unit and the instrument, and the hardware cost is not increased.
The ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and processes the four vehicle speed data to obtain the final vehicle speed for display by the combination instrument. The four vehicle speeds are mainly processed by fault screening, vehicle speed determination and the like. The ABS control unit judges the four pieces of vehicle speed data, if the deviation error among the four vehicle speeds is smaller than a set value, the four pieces of vehicle speed data are judged to be free of faults, and the vehicle speed data obtained by averaging the four pieces of vehicle speed data are used as the final vehicle speed data displayed by the combination instrument; if the deviation error among the four vehicle speeds is greater than a set value, the vehicle speed calculated by the wheel speed corresponding to the driving wheel is taken, the vehicle speed calculated by the driving wheel is judged, and if the deviation error among the vehicle speeds calculated by the driving wheel is greater than a second set value, the ABS control unit sends a vehicle speed abnormal alarm and sends a vehicle speed fault signal to the combination instrument for displaying; and if the deviation error between the vehicle speeds calculated by the driving wheels is smaller than a second set value, taking the average value of the vehicle speeds calculated by the driving wheels as the final vehicle speed data displayed by the combination instrument.
A method for acquiring and processing a vehicle speed signal of a speedometer comprises the following steps: after the vehicle is started, the wheel speed sensor and the gear ring are matched to generate an induced voltage signal, the voltage signal is transmitted to the ABS control unit through a hard wire, the ABS control unit processes, calculates and converts the induced voltage signal, and sends a corresponding pulse signal to the combination instrument speedometer through the hard wire according to a speed output coefficient agreed with the combination instrument, and the combination instrument processes and calculates the signal and displays the speed signal.
The number of the wheel speed sensors is four, the wheel speed sensors are respectively corresponding to the collection of wheel speed signals of four wheels, the ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and the final vehicle speed used for displaying by the combination instrument is obtained by processing the four vehicle speed data.
The ABS control unit judges the four vehicle speed data, if the deviation error between the four vehicle speeds is smaller than a set value, the four vehicle speed data are judged to be free of faults, the vehicle speed data obtained after averaging the four vehicle speed data are used as the vehicle speed data finally displayed by the combination instrument, and therefore the accuracy of the vehicle speed is improved, the vehicle speeds converted by the four wheels have a little error, and the average vehicle speed can be used for representing the vehicle speed better and more accurately; the deviation errors among the four vehicle speeds are the difference between the maximum value and the minimum value of the vehicle speed, and mainly represent the error between the maximum value and the minimum value of the vehicle speed obtained by calculation, generally, if the four values are correct, the maximum and minimum difference is not larger than a set value, such as 1KM/H and the like, and if the four values are larger than the set value, the vehicle speed is abnormal in the four data, and the final vehicle speed cannot be represented by adopting an average value;
if the deviation error between the four vehicle speeds is larger than or equal to a set value, the vehicle speed data with wrong calculation is considered to be contained in the four vehicle speed data or the error is too large; at the moment, an alarm signal can be directly sent out, the alarm is carried out on the abnormal vehicle speed calculation or the vehicle speed obtained by calculating the wheel speed corresponding to the driving wheel is further taken, the vehicle speed obtained by calculating the driving wheel is judged, if the deviation error between the vehicle speeds obtained by calculating the driving wheel is more than or equal to a second set value, the ABS control unit sends out the abnormal vehicle speed alarm and sends a vehicle speed fault signal to the combination instrument for displaying; and if the deviation error between the vehicle speeds calculated by the driving wheels is smaller than a second set value, taking the average value of the vehicle speeds calculated by the driving wheels as the final vehicle speed data displayed by the combination instrument. The second set value, the set value and other parameters can all set a vehicle speed threshold according to actual requirements, such as 5KM/h, 1KM/h and the like, wherein the deviation between the vehicle speeds corresponding to the driving wheels refers to a difference value between a maximum vehicle speed and a minimum vehicle speed which are calculated correspondingly by the driving wheels, and if only two driving wheels exist, the difference value is the difference value between the vehicle speeds calculated by the two driving wheels. The purpose of doing so is that when four speed do not have the anomaly, the average value is taken and the speed data can be represented more, if there is the anomaly, the accuracy of speed can be represented more or wrong trouble warning of calculation is given directly to the data of driving wheel.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (8)
1. The utility model provides a collection processing system of speedometer speed signal which characterized in that: the automobile speed signal acquisition device comprises an ABS control unit and a wheel speed sensor, wherein the wheel speed sensor is used for acquiring a wheel speed signal of a wheel, the output end of the wheel speed sensor is connected with the ABS control unit, the ABS control unit calculates a vehicle speed signal according to the received wheel speed signal and then sends the vehicle speed signal to a combination instrument module, and the combination instrument processes the received data to obtain the vehicle speed signal and displays the vehicle speed signal.
2. The system for acquiring and processing the vehicle speed signal of the speedometer as claimed in claim 1, wherein: the wheel speed sensor and the gear ring are matched to generate an induced voltage signal, and the voltage signal is transmitted to the ABS control unit through a hard wire.
3. The system for acquiring and processing the vehicle speed signal of the speedometer as claimed in claim 1 or 2, wherein: the ABS control unit is connected with the combination instrument in a hard wire connection mode and used for sending the vehicle speed signal to the instrument in a pulse signal mode.
4. A system for acquiring and processing a speedometer signal as claimed in claim 3, wherein: after the combination instrument is powered on, the instrument pointer or the display screen value is controlled to rapidly move to the corresponding vehicle speed indicating position through the acquired pulse signal.
5. The system for acquiring and processing the vehicle speed signal of the speedometer as claimed in claim 1, wherein: the number of the wheel speed sensors is four, the wheel speed sensors are respectively corresponding to the detection of wheel speed signals of four wheels, the ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and the final vehicle speed for displaying by the combination instrument is obtained by processing the four vehicle speed data.
6. A method for acquiring and processing a speedometer speedsignal is characterized in that: the method comprises the following steps:
after the vehicle is started, the wheel speed sensor and the gear ring are matched to generate an induced voltage signal, the voltage signal is transmitted to the ABS control unit through a hard wire, the ABS control unit processes, calculates and converts the induced voltage signal, and sends a corresponding pulse signal to the combination instrument speedometer through the hard wire according to a speed output coefficient agreed with the combination instrument, and the combination instrument processes and calculates the signal and displays the speed signal.
7. The method for acquiring and processing the vehicle speed signal of the speedometer as claimed in claim 6, characterized in that: the number of the wheel speed sensors is four, the wheel speed sensors are respectively corresponding to the collection of wheel speed signals of four wheels, the ABS control unit calculates the wheel speed signals collected by each wheel speed sensor to obtain vehicle speed data, and the final vehicle speed used for displaying by the combination instrument is obtained by processing the four vehicle speed data.
8. The method for acquiring and processing the vehicle speed signal of the speedometer as claimed in claim 7, characterized in that: the ABS control unit judges the four pieces of vehicle speed data, if the deviation error among the four vehicle speeds is smaller than a set value, the four pieces of vehicle speed data are judged to be free of faults, and the vehicle speed data obtained by averaging the four pieces of vehicle speed data are used as the final vehicle speed data displayed by the combination instrument; if the deviation error among the four vehicle speeds is greater than a set value, the vehicle speed calculated by the wheel speed corresponding to the driving wheel is taken, the vehicle speed calculated by the driving wheel is judged, and if the deviation error among the vehicle speeds calculated by the driving wheel is greater than a second set value, the ABS control unit sends a vehicle speed abnormal alarm and sends a vehicle speed fault signal to the combination instrument for displaying; and if the deviation error between the vehicle speeds calculated by the driving wheels is smaller than a second set value, taking the average value of the vehicle speeds calculated by the driving wheels as the final vehicle speed data displayed by the combination instrument.
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| CN202111062666.6A CN113665359A (en) | 2021-09-10 | 2021-09-10 | System and method for acquiring and processing speed signals of speedometer |
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| CN202111062666.6A CN113665359A (en) | 2021-09-10 | 2021-09-10 | System and method for acquiring and processing speed signals of speedometer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799750A (en) * | 2021-10-22 | 2021-12-17 | 奇瑞商用车（安徽）有限公司 | Vehicle speed signal acquisition method |
| CN114137349A (en) * | 2021-12-02 | 2022-03-04 | 奇瑞商用车（安徽）有限公司 | Wheel speed generating device for automobile development and test |
| CN116223835A (en) * | 2023-03-08 | 2023-06-06 | 浙江汉博汽车传感器有限公司 | Wheel speed monitoring system and wheel speed sensor |
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