CN112362358B - Method and device for determining physical value of whole vehicle signal - Google Patents
Method and device for determining physical value of whole vehicle signal Download PDFInfo
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- CN112362358B CN112362358B CN202011230414.5A CN202011230414A CN112362358B CN 112362358 B CN112362358 B CN 112362358B CN 202011230414 A CN202011230414 A CN 202011230414A CN 112362358 B CN112362358 B CN 112362358B
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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 physical values of signals of a whole vehicle, which are used for determining a target sensor for controlling signals 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 a 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 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 whole vehicle signal, does not need to add extra hardware, is convenient 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 physical values of signals of a whole vehicle.
Background
Along with the development of control system intellectualization, the accuracy of the whole car signal can influence the accuracy of control instructions of the control system. At present, a method for determining an accurate physical value of a vehicle signal generally comprises the steps of obtaining a measured value of a corresponding signal through a foreign forehead sensor, and comparing the measured value with a CAN (Controller AreaNetwork ) signal to determine the accurate physical value; or the accurate physical value is determined by visually inspecting the data displayed by the whole vehicle instrument and comparing the data with the CAN signal.
According to the method, the sensor is required to be added on the original structure of the whole vehicle, the requirement on the hardware of the whole vehicle is high, and the accuracy is poor due to the fact that signals are obtained through a visual inspection method, so that the actual requirement cannot be met by the existing method for determining the physical value of the whole vehicle signals.
Disclosure of Invention
Aiming at the problems, the invention provides a method and a device for determining the physical value of the whole vehicle signal, which realize the aim of improving the accuracy of the physical value without increasing the hardware cost.
In order to achieve the above object, the present invention provides the following technical solutions:
a method for determining physical values of a whole vehicle signal comprises the following steps:
determining a target sensor for controlling the 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 acquiring a signal conversion formula of the target sensor includes:
acquiring attribute information of the target sensor;
determining a conversion relation between 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 a signal 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 signal of the whole vehicle CAN signal.
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:
the output line of the target sensor is controlled to be disconnected, and the electric signal simulator is controlled to output the electric signal to the whole vehicle CAN network;
acquiring a signal value of the whole vehicle CAN network, and determining a coefficient and an offset of a CAN signal according to the signal value;
and calibrating the signal conversion formula based on the signal value, the coefficient of the CAN signal and the offset to obtain a target formula.
Optionally, the signal value comprises a verification signal, the method further comprising:
inputting the verification signal into the whole vehicle 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 connection with an electric signal receiver, and converting the verification signal into a verification physical quantity;
recording the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network;
and if the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network meet the conditions, determining the formula generated based on the coefficient and the offset of the CAN signal as a target formula.
An overall vehicle signal physical value determining device, comprising:
a determining unit for determining a target sensor that controls a signal to be processed;
a first acquisition unit configured to acquire 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 generation 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 the target physical value of the signal to be processed.
Optionally, the first acquisition unit includes:
a first acquisition subunit, configured to acquire 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 determination subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
Optionally, the apparatus further comprises:
the signal determining unit is used for determining a signal to be processed based on signal identification information, signal starting position information, signal ending position information and length information occupied by the signal of the whole vehicle CAN signal.
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 the physical value of a whole 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 a 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 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 whole vehicle signal, does not need to add extra hardware, is convenient 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 that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for determining a physical value of a whole vehicle signal according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for determining physical values of signals of an entire vehicle according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first and second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.
The embodiment of the invention provides a method for determining the physical value of a whole vehicle signal, which utilizes the output characteristic of a specific sensor, uses an electric signal generator to apply specific regular electric signals so as to determine the accurate physical value of the CAN signal, and uses relatively simple hardware equipment and convenient operation.
Referring to fig. 1, a flow chart of a method for determining a physical value of a whole 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 to the vehicle control unit or other control units in the vehicle are generated by special sensors, i.e. are detected or converted by the sensors. The signal to be processed refers to a signal for which it is desired to be able to obtain an accurate physical value thereof, and may be, for example, a rotational speed, a torque, a pedal opening, an acceleration signal, or the like.
S102, acquiring a signal conversion formula of the target sensor.
Attribute information of the target sensor may be obtained by recognition, and may include information of the name, model, specification, and the like of the sensor. 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 an 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.
S104, generating an electric signal of the initial physical value.
S105, calibrating the signal conversion formula according to the electric signal to obtain a target formula.
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, a number of specific physical values of the signal representing the physical quantity may be selected as its initial physical value. The signal type can be selected from the most representative physical values of the different signals according to the rotating speed, the torque, the pedal opening and the acceleration. For example, three initial physical values may be selected, which may be continuous signals, two specific values may be used to validate the signal formula, and a third value used for verification.
When the corresponding electric signals are generated in the embodiment of the invention, the method can be realized by an electric signal simulator. The signal conversion formula is calibrated by using an electrical signal, such as calibrating coefficients in the formula.
The calibrating the signal conversion formula according to the electric signal to obtain a target formula includes: the output line of the target sensor is controlled to be disconnected, and the electric signal simulator is controlled to output the electric signal to the whole vehicle CAN network; acquiring a signal value of the whole vehicle CAN network, and determining a coefficient and an offset of a CAN signal according to the signal value; and calibrating the signal conversion formula based on the signal value, the coefficient of the CAN signal and the offset to obtain a target formula.
The following describes embodiments of the invention applied to the method for determining the physical value of the whole vehicle signal.
After the ID number (e.g., unique identification number) and the hint bit of a particular vehicle CAN signal are specified, an accurate physical value of the particular signal needs to be obtained in order to know the vehicle state in detail. It is assumed that the ID number 0X01 and the valid start position s-e of a particular vehicle CAN signal, the length C information has been confirmed. That is, in the embodiment of the invention, besides the detailed information of the signal to be processed is specified, the signal to be processed CAN be determined based on the signal identification information, the signal starting position information, the signal ending position information and the length information occupied by the signal of the whole vehicle CAN signal. For example, if the start position of an accelerator pedal opening signal of a certain vehicle type is 9-16 and the length is 8, the information of the specific signal is represented from the 9 th bit to the 16 th bit under the ID according to the corresponding rule.
The processing process comprises the following steps:
(1) A sensor for determining a control signal:
the position of a sensor for controlling the signal is identified through the whole vehicle structure;
identifying the name, model and specification of the sensor, and determining a conversion formula K of the output signal and the actual physical quantity of the sensor;
three specific physical values, such as L1, L2, L3, representing physical quantities are selected according to the signal type. And reversely converting the L1, L2 and L3 into electric signals R1, R2 and R3 output by the sensor according to the conversion formula K.
(2) Signal confirmation:
disconnecting the output line of the sensor;
outputting the electric signals R1 and R2 to a whole vehicle CAN network through an electric signal simulator by using the electric signal simulator;
recording the acquired whole vehicle CAN information M1, M2 of the start bit s-e in ID 0X01 in the CAN network;
according to CAN protocol, l1=a×m1+b, l2=a×m2+b, solving for a and b;
the signal equation for the start bit s-e in ID 0X01 is formulated as: y=a x+b.
(3) Checking:
inputting R3 into a CAN network, and verifying the compliance of a physical value and L3;
connecting a sensor circuit, connecting a lead out, connecting the lead to an electric signal receiver, and converting the lead into a physical quantity by using a formula K;
and randomly adjusting the state of the vehicle, recording a physical quantity group X1 of lead-out electric signal conversion, recording a physical quantity group X2 of CAN signal reading, and judging the compliance.
(4) Confirming accurate physical value of CAN signal
Through the steps (1), 2 and 3), the accurate physical quantity conversion formula of the CAN signal is confirmed to be: y=a x+b.
Where x is the signal to be processed and y is its corresponding physical quantity. The physical quantity (also referred to as a physical value) corresponding to the signal to be processed can be obtained by the conversion formula.
The invention provides a method for determining physical values of signals of a whole vehicle, which is used for determining a target sensor for controlling signals 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 a 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 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 whole vehicle signal, does not need to add extra hardware, is convenient to operate, does not need manual prediction, and has accurate result.
Referring to fig. 2, a schematic structural diagram of a device for determining a physical value of a whole vehicle signal according to an embodiment of the present invention is shown, where the device includes:
a determining unit 10 for determining a target sensor that controls a signal to be processed;
a first acquisition unit 20 for acquiring 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 generation unit 40 for generating an electrical signal of the initial physical value;
a calibration unit 50, configured to calibrate the signal conversion formula according to the electrical signal, so as to obtain a target formula;
and the calculating unit 60 is configured to calculate the signal value of the signal to be processed according to the target formula, so as to obtain a target physical value of the signal to be processed.
Optionally, the first acquisition unit includes:
a first acquisition subunit, configured to acquire 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 determination subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
Optionally, the apparatus further comprises:
the signal determining unit is used for determining a signal to be processed based on signal identification information, signal starting position information, signal ending position information and length information occupied by the signal of the whole vehicle CAN signal.
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 physical values of signals of a whole vehicle, wherein a determining unit determines a target sensor for controlling signals to be processed; the method comprises the steps that 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 generation unit generates an electrical signal of the initial physical value; the calibration unit calibrates the signal conversion formula according to the electric signal to obtain a target formula; the calculating 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 whole vehicle signal, does not need to add extra hardware, is convenient to operate, does not need manual prediction, and has accurate result.
There is also provided in an embodiment of the present invention a storage medium storing computer program code that executes the whole vehicle signal physical value determining method described in any one of the above.
The storage medium in embodiments of the present invention may be a computer storage medium that may contain a propagated data signal with computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take on a variety of forms, including electro-magnetic, optical, etc., or any suitable combination thereof. 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 through any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or a combination of any of the foregoing.
Correspondingly, in the embodiment of the invention, there is also provided an electronic device, including:
a memory for storing a program;
a processor, configured to execute the program, where the program is specifically configured to:
determining a target sensor for controlling the 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 acquiring the signal conversion formula of the target sensor includes:
acquiring attribute information of the target sensor;
determining a conversion relation between 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 a signal 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 signal of the whole vehicle CAN signal.
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:
the output line of the target sensor is controlled to be disconnected, and the electric signal simulator is controlled to output the electric signal to the whole vehicle CAN network;
acquiring a signal value of the whole vehicle CAN network, and determining a coefficient and an offset of a CAN signal according to the signal value;
and calibrating the signal conversion formula based on the signal value, the coefficient of the CAN signal and the offset to obtain a target formula.
Further, the signal value comprises a verification signal, the method further comprising:
inputting the verification signal into the whole vehicle 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 connection with an electric signal receiver, and converting the verification signal into a verification physical quantity;
recording the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network;
and if the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network meet the conditions, determining the formula generated based on the coefficient and the offset of the CAN signal as a target formula.
In this specification, all embodiments are mainly described and are different from other embodiments, and the same similar parts between the embodiments are mutually referred to. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
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 (6)
1. The method for determining the physical value of the whole vehicle signal is characterized by comprising the following steps of:
determining a target sensor for controlling the 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;
the generating the electrical signal of the initial physical value comprises: calculating to obtain the electric signal of the initial physical value through the signal conversion formula;
calibrating a physical quantity conversion formula of the CAN signal according to the electric signal to obtain a target formula;
the calibration of the physical quantity conversion formula of the CAN signal according to the electric signal is carried out to obtain a target formula, and the calibration comprises the following steps: the output line of the target sensor is controlled to be disconnected, and the electric signal simulator is controlled to output the electric signal to the whole vehicle CAN network; acquiring a signal value of the whole vehicle CAN network, and determining a coefficient and an offset of a CAN signal according to the signal value; the signal value comprises a verification signal, and the verification signal is input to the whole vehicle CAN network to obtain a verification physical value; determining whether the verification physical value corresponding to the verification signal is consistent with the physical value output by the target sensor; if yes, controlling the output line of the target sensor to be connected, controlling the connection with an electric signal receiver, and converting the verification signal into a verification physical quantity; recording the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network; if the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network meet the conditions, calibrating a physical quantity conversion formula of the CAN signal based on the signal value, the coefficient of the CAN signal and the offset 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 between 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 according to claim 1, wherein the method further comprises:
and determining a signal 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 signal of the whole vehicle CAN signal.
4. A whole vehicle signal physical value determining apparatus, characterized by comprising:
a determining unit for determining a target sensor that controls a signal to be processed;
a first acquisition unit configured to acquire 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 generation unit for generating an electrical signal of the initial physical value;
the generation unit is specifically configured to calculate, through the signal conversion formula, an electrical signal of the initial physical value;
the calibration unit is used for calibrating a physical quantity conversion formula of the CAN signal according to the electric signal to obtain a target formula;
the calibration unit is specifically used for controlling the disconnection of an output line of the target sensor and controlling the electric signal simulator to output the electric signal to the whole vehicle CAN network; acquiring a signal value of the whole vehicle CAN network, and determining a coefficient and an offset of a CAN signal according to the signal value; the signal value comprises a verification signal, and the verification signal is input to the whole vehicle CAN network to obtain a verification physical value; determining whether the verification physical value corresponding to the verification signal is consistent with the physical value output by the target sensor; if yes, controlling the output line of the target sensor to be connected, controlling the connection with an electric signal receiver, and converting the verification signal into a verification physical quantity; recording the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network; if the physical value of the electric signal conversion and the physical value read by the whole vehicle CAN network meet the conditions, calibrating a physical quantity conversion formula of the CAN signal based on the signal value, the coefficient of the CAN signal and the offset 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 the target physical value of the signal to be processed.
5. The apparatus of claim 4, wherein the first acquisition unit comprises:
a first acquisition subunit, configured to acquire 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 determination subunit is used for determining the conversion relation as a signal conversion formula of the target sensor.
6. The apparatus of claim 4, wherein the apparatus further comprises:
the signal determining unit is used for determining a signal to be processed based on signal identification information, signal starting position information, signal ending position information and length information occupied by the signal of the whole vehicle CAN signal.
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