CN112362358A - Method and device for determining physical value of vehicle signal - Google Patents
Method and device for determining physical value of vehicle signal Download PDFInfo
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- CN112362358A CN112362358A CN202011230414.5A CN202011230414A CN112362358A CN 112362358 A CN112362358 A CN 112362358A CN 202011230414 A CN202011230414 A CN 202011230414A CN 112362358 A CN112362358 A CN 112362358A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a method and a device for determining a physical value of a finished vehicle signal, which are used for determining a target sensor for controlling a signal to be processed; acquiring a signal conversion formula of a target sensor; acquiring an initial physical value of a signal to be processed based on the signal type of the signal to be processed; generating an electrical signal of an initial physical value; calibrating the signal conversion formula according to the electric signal to obtain a target formula; and calculating the signal value of the signal to be processed by a target formula to obtain a target physical value of the signal to be processed. The invention utilizes the output characteristic of the sensor to generate a specific electric signal so as to confirm the accurate physical value of the finished automobile signal, does not need to add extra hardware, is convenient and fast to operate, does not need manual prediction and has accurate result.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a device for determining a physical value of a finished vehicle signal.
Background
Along with the development of control system intellectualization, the accuracy of the control instruction of the control system is influenced by the signal accuracy of the whole vehicle. At present, a method for determining an accurate physical value of a vehicle signal generally includes obtaining a measurement value of a corresponding signal through a foreign sensor, and comparing the measurement value with a CAN (Controller area network) signal to determine an accurate physical value; or the accurate physical value is determined by comparing the data displayed by the whole vehicle instrument with the CAN signal through visual inspection.
According to the method, the sensor needs to be added on the original structure of the whole vehicle, the requirement on the whole vehicle hardware is high, the accuracy is poor due to the fact that the signals are obtained through the visual inspection method, and therefore the existing method for determining the physical values of the whole vehicle signals cannot meet the actual requirements.
Disclosure of Invention
In view of the above problems, the present invention provides a method and an apparatus for determining a physical value of a vehicle-mounted signal, so as to achieve the purpose of improving the accuracy of the physical value without increasing hardware cost.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for determining a physical value of a finished vehicle signal comprises the following steps:
determining a target sensor for controlling a signal to be processed;
acquiring a signal conversion formula of the target sensor;
acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed;
generating an electrical signal of the initial physical value;
calibrating the signal conversion formula according to the electric signal to obtain a target formula;
and calculating the signal value of the signal to be processed through the target formula to obtain a target physical value of the signal to be processed.
Optionally, the obtaining a signal conversion formula of the target sensor includes:
acquiring attribute information of the target sensor;
determining a conversion relation of an output signal of the target sensor and an actual physical value based on the attribute information;
and determining the conversion relation as a signal conversion formula of the target sensor.
Optionally, the method further comprises:
and determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
Optionally, the generating the electrical signal of the initial physical value includes:
and calculating the electric signal of the initial physical value through the signal conversion formula.
Optionally, the calibrating the signal conversion formula according to the electrical signal to obtain a target formula includes:
controlling an output circuit of the target sensor to be disconnected, and controlling an electric signal simulator to output the electric signal to a whole vehicle CAN network;
acquiring a signal value of the whole vehicle CAN network, and determining the coefficient and the offset of a CAN signal according to the signal value;
and calibrating the signal conversion formula based on the signal value, the coefficient and the offset of the CAN signal to obtain a target formula.
Optionally, the signal value comprises a verification signal, the method further comprising:
inputting the verification signal into the finished automobile CAN network, and determining whether the verification signal is consistent with a physical value output by the target sensor;
if yes, controlling the output line of the target sensor to be connected, controlling the output line to be connected with an electric signal receiver, and converting the verification signal into a verification physical quantity;
recording the physical value converted by the electric signal and the physical value read by the CAN network of the whole vehicle;
and if the physical value converted by the electric signal and the physical value read by the finished automobile CAN network meet the conditions, determining a formula generated based on the coefficient and the offset of the CAN signal as a target formula.
A vehicle signal physical value determination device comprises:
a determination unit for determining a target sensor that controls a signal to be processed;
the first acquisition unit is used for acquiring a signal conversion formula of the target sensor;
the second acquisition unit is used for acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed;
a generating unit for generating an electrical signal of the initial physical value;
the calibration unit is used for calibrating the signal conversion formula according to the electric signal to obtain a target formula;
and the calculating unit is used for calculating the signal value of the signal to be processed through the target formula to obtain a target physical value of the signal to be processed.
Optionally, the first obtaining unit includes:
the first acquisition subunit is used for acquiring the attribute information of the target sensor;
a first determining subunit configured to determine a conversion relationship between an output signal of the target sensor and an actual physical value based on the attribute information;
and the second determining subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
Optionally, the apparatus further comprises:
and the signal determining unit is used for determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
Optionally, the generating unit is specifically configured to:
and calculating the electric signal of the initial physical value through the signal conversion formula.
Compared with the prior art, the invention provides a method and a device for determining a physical value of a finished vehicle signal, which are used for determining a target sensor for controlling a signal to be processed; acquiring a signal conversion formula of a target sensor; acquiring an initial physical value of a signal to be processed based on the signal type of the signal to be processed; generating an electrical signal of an initial physical value; calibrating the signal conversion formula according to the electric signal to obtain a target formula; and calculating the signal value of the signal to be processed by a target formula to obtain a target physical value of the signal to be processed. The invention utilizes the output characteristic of the sensor to generate a specific electric signal so as to confirm the accurate physical value of the finished automobile signal, does not need to add extra hardware, is convenient and fast to operate, does not need manual prediction and has accurate result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for determining a physical value of a vehicle signal according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for determining a physical value of a vehicle signal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The embodiment of the invention provides a method for determining a physical value of a finished automobile signal, which utilizes the output characteristic of a specific sensor and applies an electric signal with a specific rule by using an electric signal generator so as to determine the accurate physical value of the CAN signal, and the used hardware equipment is relatively simple and is convenient to operate.
Referring to fig. 1, a schematic flow chart of a method for determining a physical value of a vehicle signal according to an embodiment of the present invention is shown, where the method may include the following steps:
s101, determining a target sensor for controlling a signal to be processed.
The signals transmitted in the vehicle to the vehicle control unit or to other controls are generated by dedicated sensors, i.e. acquired or converted by the sensors. The signal to be processed is a signal for which an accurate physical value is expected to be obtained, and may be a rotating speed, a torque, a pedal opening, an acceleration signal, or the like.
And S102, acquiring a signal conversion formula of the target sensor.
Attribute information of the target sensor, which may include information of name, model, specification, etc. of the sensor, may be obtained by the recognition. And then, searching information through the attribute information of the sensor, for example, searching through a specification of the sensor, so as to obtain a conversion formula of the output signal of the sensor and an actual physical value, namely a signal conversion formula.
S103, acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed.
And S104, generating an electric signal of the initial physical value.
And S105, calibrating the signal conversion formula according to the electric signal to obtain a target formula.
And S106, calculating the signal value of the signal to be processed through a target formula to obtain a target physical value of the signal to be processed.
Depending on the signal type of the signal to be processed, several specific physical values of the signal representing physical quantities may be selected as its initial physical value. The signal type can be rotation speed, torque, pedal opening degree and acceleration, and the most representative physical value of different signals is selected. For example, three initial physical values may be selected, which may be continuous signals, two specific values may identify the signal formula, and the third value may be used for verification.
When the corresponding electrical signal is generated in the embodiment of the present invention, the generation may be realized by an electrical signal simulator. The signal conversion formula is calibrated by using an electrical signal, such as the coefficients in the formula.
Wherein the calibrating the signal conversion formula according to the electrical signal to obtain a target formula comprises: controlling an output circuit of the target sensor to be disconnected, and controlling an electric signal simulator to output the electric signal to a whole vehicle CAN network; acquiring a signal value of the whole vehicle CAN network, and determining the coefficient and the offset of a CAN signal according to the signal value; and calibrating the signal conversion formula based on the signal value, the coefficient and the offset of the CAN signal to obtain a target formula.
The following describes an exemplary embodiment applied to the method for determining a physical value of a vehicle signal according to the present invention.
After the ID number (e.g., unique identification number) and the start position of a specific vehicle CAN signal are specified, in order to know the vehicle state in detail, an accurate physical value of the specific signal needs to be acquired. Assuming that the ID number 0X01 and the valid start position s-e of a particular vehicle CAN signal, the length C information is confirmed. That is, in the embodiment of the present invention, in addition to specifying the detailed information of the signal to be processed, the signal to be processed may be determined based on the signal identification information, the signal start position information, the signal end position information, and the length information occupied by the signal of the entire vehicle CAN signal. For example, if the start position of the accelerator pedal opening signal of a certain vehicle type is 9 to 16 and the length is 8, the information of the specific signal is represented from the 9 th position to the 16 th position under the ID according to the correspondence rule.
The treatment process comprises the following steps:
(1) sensors determining control signals:
the position of a sensor for controlling the signal is identified through the structure of the whole vehicle;
identifying the name, model and specification of the sensor, and determining a conversion formula K of an output signal of the sensor and an actual physical quantity;
depending on the type of signal, three specific physical values of the signal representing physical quantities are selected, such as L1, L2, L3. And reversely converting the L1, the L2 and the L3 into the electric signals R1, R2 and R3 output by the sensors according to the conversion formula K.
(2) Signal confirmation:
disconnecting the output line of the sensor;
the electric signal simulator is used for outputting electric signals R1 and R2 to a CAN network of the whole vehicle;
recording the obtained whole vehicle CAN information M1 and M2 of a start position s-e in ID 0X01 in the CAN network;
solving for a and b according to the CAN protocol, L1 ═ a × M1+ b, L2 ═ a × M2+ b;
the signal formula for setting the start bit s-e in ID 0X01 is: y ═ a × x + b.
(3) Checking:
inputting R3 into a CAN network, and verifying the conformity of the physical value and L3;
connecting a sensor line, and connecting out a lead wire, wherein the lead wire is connected with an electric signal receiver and is converted into a physical quantity by using a formula K;
and (3) randomly adjusting the state of the vehicle, recording a physical quantity group X1 converted by leading out an electric signal through a lead, recording a physical quantity group X2 read by a CAN signal, and judging the conformity.
(4) Confirming accurate physical values of CAN signals
After the steps (1), (2) and (3), the accurate physical quantity conversion formula of the CAN signal is confirmed to be as follows: y ═ a × x + b.
Where x is the signal to be processed and y is its corresponding physical quantity. That is, the physical quantity (also referred to as physical value) corresponding to the signal to be processed can be obtained by the conversion formula.
The invention provides a method for determining a physical value of a finished vehicle signal, which comprises the steps of determining a target sensor for controlling a signal to be processed; acquiring a signal conversion formula of a target sensor; acquiring an initial physical value of a signal to be processed based on the signal type of the signal to be processed; generating an electrical signal of an initial physical value; calibrating the signal conversion formula according to the electric signal to obtain a target formula; and calculating the signal value of the signal to be processed by a target formula to obtain a target physical value of the signal to be processed. The invention utilizes the output characteristic of the sensor to generate a specific electric signal so as to confirm the accurate physical value of the finished automobile signal, does not need to add extra hardware, is convenient and fast to operate, does not need manual prediction and has accurate result.
Referring to fig. 2, a schematic structural diagram of a vehicle integrity signal physical value determination apparatus according to an embodiment of the present invention is shown, where the apparatus includes:
a determination unit 10 for determining a target sensor that controls a signal to be processed;
a first obtaining unit 20, configured to obtain a signal conversion formula of the target sensor;
a second obtaining unit 30, configured to obtain an initial physical value of the signal to be processed based on a signal type of the signal to be processed;
a generating unit 40 for generating an electrical signal of the initial physical value;
the calibration unit 50 is configured to calibrate the signal conversion formula according to the electrical signal to obtain a target formula;
the calculating unit 60 is configured to calculate a signal value of the signal to be processed by using the target formula, so as to obtain a target physical value of the signal to be processed.
Optionally, the first obtaining unit includes:
the first acquisition subunit is used for acquiring the attribute information of the target sensor;
a first determining subunit configured to determine a conversion relationship between an output signal of the target sensor and an actual physical value based on the attribute information;
and the second determining subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
Optionally, the apparatus further comprises:
and the signal determining unit is used for determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
Optionally, the generating unit is specifically configured to:
and calculating the electric signal of the initial physical value through the signal conversion formula.
The invention provides a device for determining a physical value of a finished vehicle signal, wherein a determining unit determines a target sensor for controlling a signal to be processed; a first acquisition unit acquires a signal conversion formula of a target sensor; the second acquisition unit acquires an initial physical value of the signal to be processed based on the signal type of the signal to be processed; the generating unit generates an electric signal of an initial physical value; the calibration unit calibrates the signal conversion formula according to the electric signal to obtain a target formula; the calculation unit calculates the signal value of the signal to be processed through a target formula to obtain a target physical value of the signal to be processed. The invention utilizes the output characteristic of the sensor to generate a specific electric signal so as to confirm the accurate physical value of the finished automobile signal, does not need to add extra hardware, is convenient and fast to operate, does not need manual prediction and has accurate result.
The embodiment of the invention also provides a storage medium, wherein the storage medium stores computer program codes, and the computer program codes execute any one of the whole vehicle signal physical value determining methods.
In embodiments of the present invention, the storage medium may be a computer storage medium that may contain a propagated data signal with the computer program code embodied therewith, for example, on a baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, etc., or any suitable combination. A computer storage medium may be any computer-readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer storage medium may be propagated over any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or any combination of the preceding.
Correspondingly, in an embodiment of the present invention, an electronic device is further provided, where the electronic device includes:
a memory for storing a program;
a processor configured to execute the program, the program specifically configured to:
determining a target sensor for controlling a signal to be processed;
acquiring a signal conversion formula of the target sensor;
acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed;
generating an electrical signal of the initial physical value;
calibrating the signal conversion formula according to the electric signal to obtain a target formula;
and calculating the signal value of the signal to be processed through the target formula to obtain a target physical value of the signal to be processed.
Further, the obtaining a signal conversion formula of the target sensor includes:
acquiring attribute information of the target sensor;
determining a conversion relation of an output signal of the target sensor and an actual physical value based on the attribute information;
and determining the conversion relation as a signal conversion formula of the target sensor.
Further, the method further comprises:
and determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
Further, the generating the electrical signal of the initial physical value includes:
and calculating the electric signal of the initial physical value through the signal conversion formula.
Further, the calibrating the signal conversion formula according to the electrical signal to obtain a target formula includes:
controlling an output circuit of the target sensor to be disconnected, and controlling an electric signal simulator to output the electric signal to a whole vehicle CAN network;
acquiring a signal value of the whole vehicle CAN network, and determining the coefficient and the offset of a CAN signal according to the signal value;
and calibrating the signal conversion formula based on the signal value, the coefficient and the offset of the CAN signal to obtain a target formula.
Further, the signal value comprises an authentication signal, the method further comprising:
inputting the verification signal into the finished automobile CAN network, and determining whether the verification signal is consistent with a physical value output by the target sensor;
if yes, controlling the output line of the target sensor to be connected, controlling the output line to be connected with an electric signal receiver, and converting the verification signal into a verification physical quantity;
recording the physical value converted by the electric signal and the physical value read by the CAN network of the whole vehicle;
and if the physical value converted by the electric signal and the physical value read by the finished automobile CAN network meet the conditions, determining a formula generated based on the coefficient and the offset of the CAN signal as a target formula.
In the present specification, the emphasis points of the embodiments are different from those of the other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for determining a physical value of a finished vehicle signal is characterized by comprising the following steps:
determining a target sensor for controlling a signal to be processed;
acquiring a signal conversion formula of the target sensor;
acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed;
generating an electrical signal of the initial physical value;
calibrating the signal conversion formula according to the electric signal to obtain a target formula;
and calculating the signal value of the signal to be processed through the target formula to obtain a target physical value of the signal to be processed.
2. The method of claim 1, wherein the obtaining a signal conversion formula for the target sensor comprises:
acquiring attribute information of the target sensor;
determining a conversion relation of an output signal of the target sensor and an actual physical value based on the attribute information;
and determining the conversion relation as a signal conversion formula of the target sensor.
3. The method of claim 1, further comprising:
and determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
4. The method of claim 1, wherein the generating the electrical signal of the initial physical value comprises:
and calculating the electric signal of the initial physical value through the signal conversion formula.
5. The method of claim 4, wherein said calibrating the signal conversion equation based on the electrical signal to obtain a target equation comprises:
controlling an output circuit of the target sensor to be disconnected, and controlling an electric signal simulator to output the electric signal to a whole vehicle CAN network;
acquiring a signal value of the whole vehicle CAN network, and determining the coefficient and the offset of a CAN signal according to the signal value;
and calibrating the signal conversion formula based on the signal value, the coefficient and the offset of the CAN signal to obtain a target formula.
6. The method of claim 5, wherein the signal value comprises an authentication signal, the method further comprising:
inputting the verification signal into the finished automobile CAN network, and determining whether the verification signal is consistent with a physical value output by the target sensor;
if yes, controlling the output line of the target sensor to be connected, controlling the output line to be connected with an electric signal receiver, and converting the verification signal into a verification physical quantity;
recording the physical value converted by the electric signal and the physical value read by the CAN network of the whole vehicle;
and if the physical value converted by the electric signal and the physical value read by the finished automobile CAN network meet the conditions, determining a formula generated based on the coefficient and the offset of the CAN signal as a target formula.
7. A vehicle signal physical value determination device is characterized by comprising:
a determination unit for determining a target sensor that controls a signal to be processed;
the first acquisition unit is used for acquiring a signal conversion formula of the target sensor;
the second acquisition unit is used for acquiring an initial physical value of the signal to be processed based on the signal type of the signal to be processed;
a generating unit for generating an electrical signal of the initial physical value;
the calibration unit is used for calibrating the signal conversion formula according to the electric signal to obtain a target formula;
and the calculating unit is used for calculating the signal value of the signal to be processed through the target formula to obtain a target physical value of the signal to be processed.
8. The apparatus of claim 7, wherein the first obtaining unit comprises:
the first acquisition subunit is used for acquiring the attribute information of the target sensor;
a first determining subunit configured to determine a conversion relationship between an output signal of the target sensor and an actual physical value based on the attribute information;
and the second determining subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
9. The apparatus of claim 7, further comprising:
and the signal determining unit is used for determining the signals to be processed based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signals of the CAN signals of the whole vehicle.
10. The apparatus according to claim 7, wherein the generating means is specifically configured to:
and calculating the electric signal of the initial physical value through the signal conversion formula.
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