CN109443771B

CN109443771B - Waveform generation method and device, terminal and readable storage medium

Info

Publication number: CN109443771B
Application number: CN201811185856.5A
Authority: CN
Inventors: 曾凡荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2021-07-13
Anticipated expiration: 2038-10-11
Also published as: CN109443771A

Abstract

The invention provides a waveform generation method, a device, a terminal and a readable storage medium, wherein the method comprises the following steps: acquiring engine information of a test object; and generating waveform data according to the engine information, wherein the waveform data is in a preset data format. The waveform generation method can change the corresponding relation between the crankshaft signal and the camshaft signal through simple adjustment, and the process of generating the waveform data is simple and easy to operate.

Description

Waveform generation method and device, terminal and readable storage medium

Technical Field

The invention relates to the field of automobiles, in particular to a waveform generation method, a waveform generation device, a waveform generation terminal and a readable storage medium.

Background

In the process of automobile maintenance, design and manufacture, a crankshaft signal generator is an indispensable sensor signal simulation device, and the corresponding relation of signals of different engines and crankshafts and camshafts is not fixed. At present, the signal generator is developed based on a single chip microcomputer, and signals of a crankshaft and a camshaft of an engine are fixed and cannot be adjusted. Each signal generator is specific to a certain fixed vehicle model, i.e. is only suitable for a certain fixed engine model. When the engine is different, the corresponding relation of the crankshaft camshaft sensor signal panel is changed, the signal generator is invalid, and the single chip microcomputer in the instrument is required to be reprogrammed to adapt to the change of the crankshaft camshaft signal panel of different vehicle types. The programming of the singlechip is a complex process, and the singlechip is required to be used only by professional programming knowledge, so that the operation is complex.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect of complicated operation of the crankshaft signal generator in the prior art.

Therefore, the invention provides the following technical scheme:

in a first aspect of the present invention, a waveform generating method is provided, which includes the following steps: acquiring engine information of a test object; and generating waveform data according to the engine information, wherein the waveform data is in a preset data format.

Optionally, generating waveform data from the engine information comprises: determining the type of a sensor at the position of a crankshaft and crankshaft signal panel information according to the engine information; and generating waveform data according to the sensor type and the crankshaft signal panel information.

Optionally, generating waveform data according to the sensor type and the crank signal disc information includes: determining an output channel of a waveform according to the type of the sensor; determining the number of signal teeth according to the crankshaft signal panel information, wherein the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the position of a notch of the signal panel; and generating waveform data according to the output channels and the number of the signal teeth.

Optionally, generating waveform data according to the output channels and the number of signal teeth includes: determining the number of phases occupied by the output waveform on the output channel according to the total tooth number; generating an initial waveform according to the phase number; and generating waveform data according to the number of the missing teeth and the initial waveform.

In a second aspect of the present invention, there is provided a waveform generating apparatus comprising: the first acquisition module is used for acquiring engine information of a test object; and the first processing module is used for generating waveform data according to the engine information, and the waveform data is in a preset data format.

Optionally, the first processing module includes: the first processing submodule is used for determining the type of a sensor on the position of a crankshaft and crankshaft signal panel information according to the engine information; and the second processing submodule is used for generating waveform data according to the sensor type and the crankshaft signal disc information.

Optionally, the second processing sub-module includes: the first processing unit is used for determining an output channel of the waveform according to the sensor type; the second processing unit is used for determining the number of signal teeth according to the crankshaft signal panel information, wherein the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the notch position of the signal panel; and the third processing unit is used for generating waveform data according to the output channel and the number of the signal teeth.

Optionally, the third processing unit includes: the first processing subunit is used for determining the number of phases occupied by the output waveform on the output channel according to the total tooth number; the second processing subunit is used for generating an initial waveform according to the phase number; and the third processing subunit is used for generating waveform data according to the number of the missing teeth and the initial waveform.

In a third aspect of the present invention, a terminal is provided, which includes: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the waveform generation method according to any one of the first aspect of the present invention.

In a fourth aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a computer to execute the waveform generation method according to any one of the first aspect of the present invention.

The technical scheme of the invention has the following advantages:

the waveform generation method provided by the invention comprises the following steps: acquiring engine information of a test object; and generating waveform data according to the engine information, wherein the waveform data is in a preset data format. The waveform generation method can change the corresponding relation between the crankshaft signal and the camshaft signal through simple adjustment, and the process of generating the waveform data is simple and easy to operate.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a flowchart of a specific example of a waveform generation method in the embodiment of the present invention;

fig. 2 is a flowchart of another specific example of a waveform generation method in the embodiment of the present invention;

fig. 3 is a flowchart of another specific example of a waveform generation method in the embodiment of the present invention;

fig. 4 is a flowchart of another specific example of a waveform generation method in the embodiment of the present invention;

fig. 5 is a diagram showing a specific example of a waveform generated by the waveform generation method in the embodiment of the present invention;

fig. 6 is a block diagram showing a specific example of a waveform generating apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal in an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The present embodiment provides a waveform generating method, which is used in a test process of an automobile engine, and fig. 1 is a flowchart of the waveform generating method according to the embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S1: engine information of a test object is acquired. In an alternative embodiment, the engine information of the test object can be obtained through operator observation or oscilloscope test or logic analysis, and the engine information can comprise the sensor type of the engine and crankshaft signal panel information. Other means known in the art, such as image acquisition, may be used by those skilled in the art based on the description of the embodiment.

Step S2: and generating waveform data according to the engine information, wherein the waveform data is in a preset data format. Waveform data in a preset data format generated according to engine information are waveform data required by an engine test of a test object, the waveform data are stored in a crankshaft signal generator, the crankshaft signal generator is connected with the engine, and a controller in the crankshaft signal generator can test the waveform data after processing the waveform data.

The processing of the waveform data by the controller is specifically as follows: waveform data are stored in a read-write memory of the crankshaft signal generator through USB-to-serial port data in the crankshaft signal generator, the waveform data in the read-write memory are read through a controller, and the read waveform data are actual test waveforms with voltage information and frequency information. The test data is consistent with the shape of an actual test waveform, but the test waveform cannot reflect the voltage and the frequency, the actual test waveform can be formed after being controlled and output by the controller, and the voltage and the frequency of the actual test waveform need to be determined according to an engine to be tested. If the required test voltage of the engine to be tested is 9V and the frequency is 150Hz, the output voltage can be adjusted by changing the voltage value or the resistance value of the external power supply, and the output frequency can be adjusted by changing the clock signal for reading data.

In an optional embodiment, the preset data format can be hexadecimal, and the hexadecimal waveform data can save storage space and is more convenient to read; of course, in other embodiments, the preset data format may also be binary or octal, and the like, and may be set reasonably as needed.

The waveform generation method can change the corresponding relation between the crankshaft signal and the camshaft signal through simple adjustment, and the process of generating the waveform data is simple and easy to operate.

In an alternative embodiment, as shown in fig. 2, the step S2 specifically includes steps S21-S22:

step S21: the type of sensor at the crankshaft position and crankshaft signal panel information are determined from the engine information. In an alternative embodiment, the crankshaft position sensor types include a magnetoelectric sensor and a hall sensor, the engine-required test signal of the magnetoelectric sensor is a sinusoidal signal, and the engine-required test signal of the hall sensor is a square wave signal. The crankshaft signal panel information may include the number of signal teeth; in other embodiments, the crankshaft signal panel information can also include total tooth number and default tooth number, etc., and can be reasonably set as required.

Step S22: and generating waveform data according to the sensor type and the crankshaft signal panel information.

In an alternative embodiment, as shown in fig. 3, step S22 specifically includes steps S221-S223:

step S221: and determining the output channel of the waveform according to the type of the sensor. Since the sensor types include a magnetoelectric sensor and a hall sensor, the waveform output channels also include two types of output channels, i.e., a first type of output channel and a second type of output channel. The first type output channel corresponds to the Hall sensor and outputs square wave data; the second type output channel corresponds to the magnetoelectric sensor and outputs sine data. If the engine of the tested object is a magnetoelectric sensor, the output channel of the waveform selects the second type output channel to output sine data, and the sine data is processed by a subsequent crankshaft signal generator to obtain the sine waveform required by the test.

In an alternative embodiment, the first type of output channel comprises two channels, channel 1 and channel 2; the second type of output channel comprises three channels, channel 3, channel 4 and channel 5.

Step S222: and determining the number of signal teeth according to the crankshaft signal panel information, wherein the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the notch position of the signal panel.

Step S223: and generating waveform data according to the output channels and the number of the signal teeth.

In an alternative embodiment, as shown in fig. 4, the step S223 specifically includes steps S2231 to S2233:

step S2231: and determining the phase number occupied by the output waveform on the output channel according to the total number of the teeth.

In an alternative embodiment, the number of phases occupied by each tooth is 2, and 2 phases represent one waveform unit, and if the total number of teeth is 60, the number of phases occupied by the output waveform is 120, including 60 waveform units, that is, one tooth corresponds to one waveform unit.

Step S2232: an initial waveform is generated from the phase number. The number of waveform units contained in the initial waveform is the same as the total number of teeth.

Step S2233: and generating waveform data according to the number of the missing teeth and the initial waveform. And if the notch position on the crankshaft signal panel lacks signal teeth, the waveform unit corresponding to the corresponding signal teeth needs to be removed from the initial waveform. If the total number of teeth of the signal panel is 60, the number of missing teeth is 2, and the 2 missing teeth are adjacent, the initial waveform includes 60 waveform units, and 2 continuous waveform units are removed from any position of the 60 waveform units.

The generation process of waveform data is described by taking hexadecimal as an example. The output of the

channels

1 and 2 is square wave data, so that the waveform data on each phase of each channel occupies 1 bit binary, for example, 0 represents low potential, and 1 represents high potential. The sinusoidal data is output on channels 3, 4 and 5, so the waveform data on each phase of each channel is in 2-bit binary, e.g., the first binary represents the waveform in the positive half period (0 represents no waveform in the positive half period, and 1 represents a waveform in the positive half period), and the second binary represents the waveform in the negative half period (0 represents no waveform in the negative half period, and 1 represents a waveform in the negative half period). Thus, the data on each channel in the phase is: channel 5 is denoted by D7 and D6, channel 4 is denoted by D5 and D4, channel 3 is denoted by D3 and D2, channel 2 is denoted by D1, and channel 1 is denoted by D0, and each phase corresponds to two hexadecimal values. As shown in fig. 5, the waveforms on channels 1-5 are represented by binary numbers 00000001 for phase 1, 00010000 for phase 2, 00100101 for phase 3, 01011010 for phase 4, 10100011 for phase 5, 00010011 for phase 6, and 00100001 for phase 7; the waveform data generated from this waveform is 0110255AA 31321.

In this embodiment, a waveform generating apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

As shown in fig. 6, the waveform generating apparatus includes: the first obtaining module 1 is configured to obtain engine information of a test object, and a specific working process of the first obtaining module may be referred to in step S1 in the foregoing method embodiment; the first processing module 2 is configured to generate waveform data according to the engine information, where the waveform data is in a preset data format, and the specific operation process of the first processing module may be described in step S2 in the foregoing method embodiment.

In an alternative embodiment, the first processing module comprises: a first processing submodule, configured to determine, based on the engine information, a type of sensor at the crankshaft position and crankshaft signal panel information, and a specific operation process of the first processing submodule may be referred to in step S21 in the above method embodiment; the second processing submodule is configured to generate waveform data according to the sensor type and the crank signal disc information, and the specific operation process of the second processing submodule can be referred to as step S22 in the above method embodiment.

In an alternative embodiment, the second processing submodule includes: a first processing unit, configured to determine an output channel of a waveform according to a type of the sensor, where a specific working process of the first processing unit may be described in step S221 in the above method embodiment; the second processing unit is configured to determine the number of signal teeth according to the crankshaft signal panel information, where the number of signal teeth includes the total number of teeth of the signal panel and the number of missing teeth included in the notch position of the signal panel, and a specific working process of the second processing unit may be described in step S222 in the above method embodiment; the third processing unit is configured to generate waveform data according to the output channels and the number of signal teeth, and the specific working process of the third processing unit may be as described in step S223 in the foregoing method embodiment.

In an alternative embodiment, the third processing unit comprises: the first processing subunit is configured to determine, according to the total number of teeth, a number of phases occupied by an output waveform on the output channel, and a specific working process of the first processing subunit may be referred to in step S2231 of the foregoing method embodiment; a second processing subunit, configured to generate an initial waveform according to the phase number, where a specific working process of the second processing subunit may be referred to in step S2232 in the foregoing method embodiment; (ii) a The third processing subunit is configured to generate waveform data according to the number of missing teeth and the initial waveform, and the specific working process of the third processing subunit may be as described in step S2233 in the foregoing method embodiment.

Further functional descriptions of the modules are the same as those of the method embodiments, and are not repeated herein.

The present embodiment further provides a terminal, as shown in fig. 7, including: a processor 701 and a memory 702; the processor 701 and the memory 702 may be connected by a bus or by other means, and fig. 7 illustrates an example of a connection by a bus.

Processor 701 may be a Central Processing Unit (CPU). The Processor 701 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.

The memory 702, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules (e.g., the first acquisition module 1 and the first processing module 2 shown in fig. 6) corresponding to the waveform generation method in the embodiment of the present invention. The processor 701 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions, and modules stored in the memory 702, that is, implements the waveform generation method in the above-described method embodiments.

The memory 702 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 701, and the like. Further, the memory 702 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 702 may optionally include memory located remotely from processor 701, which may be connected to processor 701 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The one or more modules are stored in the memory 702 and, when executed by the processor 701, perform the waveform generation method in the embodiment shown in fig. 1 to 4.

The specific details of the server may be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to fig. 4, and are not described herein again.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A waveform generation method, comprising the steps of:

acquiring engine information of a test object;

generating waveform data according to the engine information, wherein the waveform data is in a preset data format;

wherein generating waveform data from the engine information comprises:

determining the type of a sensor at the position of a crankshaft and crankshaft signal panel information according to the engine information;

generating waveform data according to the sensor type and the crankshaft signal disc information, wherein the sensor type comprises a Hall sensor corresponding to a first type output channel and a magnetoelectric sensor corresponding to a second type output channel, the first type output channel comprises a channel 1 and a channel 2, square wave data are output on the channel 1 and the channel 2, the waveform data on each phase on each channel is in 1-bit binary system, the second type output channel comprises a channel 3, a channel 4 and a channel 5, sinusoidal data are output on the channel 3, the channel 4 and the channel 5, the waveform data on each phase on each channel is in 2-bit binary system, the first binary system represents the waveform in a positive half period, and the second binary system represents the waveform in a negative half period;

the crankshaft signal panel information comprises the number of signal teeth, and the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the notch position of the signal panel.

2. The waveform generation method according to claim 1, wherein generating waveform data from the sensor type and the crank signal disc information includes:

determining an output channel of a waveform according to the type of the sensor;

determining the number of signal teeth according to the crankshaft signal panel information, wherein the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the position of a notch of the signal panel;

and generating waveform data according to the output channels and the number of the signal teeth.

3. The waveform generation method according to claim 2, wherein generating waveform data based on the output channels and the number of signal teeth includes:

determining the number of phases occupied by the output waveform on the output channel according to the total tooth number;

generating an initial waveform according to the phase number;

and generating waveform data according to the number of the missing teeth and the initial waveform.

4. A waveform generation apparatus, comprising:

the first acquisition module is used for acquiring engine information of a test object;

the first processing module is used for generating waveform data according to the engine information, and the waveform data is in a preset data format;

wherein the first processing module comprises:

the first processing submodule is used for determining the type of a sensor on the position of a crankshaft and crankshaft signal panel information according to the engine information;

the second processing submodule is used for generating waveform data according to the sensor type and the crankshaft signal disc information, wherein the sensor type comprises a Hall sensor corresponding to a first type output channel and a magnetoelectric sensor corresponding to a second type output channel, the first type output channel comprises a channel 1 and a channel 2, square wave data are output on the channel 1 and the channel 2, the waveform data on each phase on each channel occupy 1-bit binary system, the second type output channel comprises a channel 3, a channel 4 and a channel 5, sinusoidal data are output on the channel 3, the channel 4 and the channel 5, the waveform data on each phase on each channel occupy 2-bit binary system, the first binary system represents a waveform in a positive half period, and the second binary system represents a waveform in a negative half period;

5. The waveform generation apparatus according to claim 4, wherein the second processing submodule includes:

the first processing unit is used for determining an output channel of the waveform according to the sensor type;

the second processing unit is used for determining the number of signal teeth according to the crankshaft signal panel information, wherein the number of the signal teeth comprises the total number of teeth of the signal panel and the number of missing teeth contained in the notch position of the signal panel;

and the third processing unit is used for generating waveform data according to the output channel and the number of the signal teeth.

6. The waveform generation apparatus according to claim 5, wherein the third processing unit includes:

the first processing subunit is used for determining the number of phases occupied by the output waveform on the output channel according to the total tooth number;

the second processing subunit is used for generating an initial waveform according to the phase number;

and the third processing subunit is used for generating waveform data according to the number of the missing teeth and the initial waveform.

7. A terminal, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the waveform generation method of any one of claims 1-3.

8. A computer-readable storage medium storing computer instructions for causing a computer to perform the waveform generation method according to any one of claims 1 to 3.