CN111766395A - Automobile engine rotating speed detection method and device and battery detection equipment - Google Patents
Automobile engine rotating speed detection method and device and battery detection equipment Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The embodiment of the invention relates to the technical field of automobiles, and discloses an automobile engine rotating speed detection method and device and battery detection equipment. The method for detecting the rotating speed of the automobile engine comprises the following steps: when an engine of the automobile is in an idling state, determining a conversion ratio of the engine speed of the automobile to the charging ripple frequency; acquiring the current charging ripple frequency of the storage battery; and calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio. Through the mode, the embodiment of the invention can simplify the calculation process of the rotating speed of the engine and improve the detection speed of the rotating speed of the engine.
Description
Technical Field
The embodiment of the invention relates to the technical field of automobiles, in particular to an automobile engine rotating speed detection method and device and battery detection equipment.
Background
In the process of detecting the performance of the automobile, the engine rotating speed is required to be detected. For example, when the charging capability of the automobile generator is detected, the rotation speed of the engine needs to be detected to determine whether the rotation speed of the engine reaches a preset standard, and the charging capability of the automobile generator can be saturated only when the rotation speed of the engine reaches the preset standard.
At present, when the rotating speed of an engine is detected, intermediate parameters such as the number of magnetic pole pairs of a generator and a rotor, the number of generating phases of the generator, the rotating speed ratio of the generator and the engine, the number of cylinders of the engine and the like need to be determined, and because the intermediate parameters are more, the rotating speed of the engine can be calculated by more calculation formulas, so that the rotating speed of the engine is complicated to calculate.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for detecting the rotating speed of an automobile engine and battery detection equipment, which can simplify the calculation process of the rotating speed of the engine and improve the detection speed of the rotating speed of the engine.
In order to solve the above technical problem, one technical solution adopted by the embodiments of the present invention is: the method for detecting the rotating speed of the automobile engine is applied to a battery detection device, the battery detection device is connected with a storage battery of the automobile, and the method comprises the following steps:
determining a conversion ratio of an engine speed to a charging ripple frequency of the automobile when an engine of the automobile is in an idle state;
acquiring the current charging ripple frequency of the storage battery;
and calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
Optionally, the determining a conversion ratio of the engine speed and the charging ripple frequency of the automobile specifically includes:
when an engine of the automobile is in an idling state, acquiring an idling charging ripple frequency of the storage battery;
determining an idle speed of the vehicle;
and determining the conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed.
Optionally, the determining a conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed specifically includes:
determining a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to a charging ripple frequency.
Optionally, the acquiring the current charging ripple frequency of the storage battery specifically includes:
acquiring a current charging ripple signal of the storage battery through a band-pass filter;
and carrying out Fourier transform on the current charging ripple signal to obtain the current charging ripple frequency.
Optionally, the calculation formula of the current engine speed is as follows:
wherein r is the current engine speed, f is the current charging ripple frequency, and x is the conversion ratio of the engine speed and the charging ripple frequency.
In order to solve the above technical problem, another technical solution adopted in the embodiments of the present invention is: the utility model provides an automobile engine rotational speed detection device, is applied to battery check out test set, battery check out test set with the battery of car is connected, includes:
the determining module is used for determining a conversion ratio of the engine speed and the charging ripple frequency of the automobile when the engine of the automobile is in an idle state;
the acquisition module is used for acquiring the current charging ripple frequency of the storage battery;
and the calculation module is used for calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
Optionally, the determining module is specifically configured to:
when an engine of the automobile is in an idling state, acquiring an idling charging ripple frequency of the storage battery;
determining an idle speed of the vehicle;
and determining the conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed.
Optionally, the determining module is specifically configured to:
determining a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to a charging ripple frequency.
Optionally, the obtaining module is specifically configured to:
acquiring a current charging ripple signal of the storage battery through a band-pass filter;
and carrying out Fourier transform on the current charging ripple signal to obtain the current charging ripple frequency.
In order to solve the above technical problem, another technical solution adopted in the embodiments of the present invention is: there is provided a battery test apparatus for connection with a battery of an automobile, the battery test apparatus comprising:
the sampling circuit is connected with the storage battery through a signal acquisition connecting wire; and the number of the first and second groups,
the controller is electrically connected with the sampling circuit;
wherein the controller comprises at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor;
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method described above.
Optionally, the signal acquisition connecting line is a kelvin four-wire clamp.
Optionally, the sampling circuit comprises:
the input end of the band-pass filter is connected with the storage battery, and the output end of the band-pass filter is connected with the controller.
Optionally, the sampling circuit further comprises:
and the input end of the signal processor is connected with the storage battery, and the output end of the signal processor is connected with the input end of the band-pass filter.
In order to solve the above technical problem, another technical solution adopted in the embodiments of the present invention is: a non-transitory computer-readable storage medium is provided that stores computer-executable instructions for causing a controller to perform the method described above.
The embodiment of the invention has the beneficial effects that: in the method, after a conversion ratio between the engine speed and the charging ripple frequency of the automobile is determined when the engine of the automobile is in an idle state, the current engine speed of the automobile is calculated according to the obtained current charging ripple frequency of the storage battery and the determined conversion ratio. That is, in the embodiment of the present invention, the current engine speed of the vehicle can be calculated according to the current charging ripple frequency and the conversion ratio, so that the calculation process of the engine speed is simplified, and the detection speed of the transmitter speed is increased.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic diagram of an implementation environment provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a hardware structure of a controller according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for detecting the rotational speed of an engine of an automobile according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an automobile engine speed detection device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the 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.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention provides a method and a device for detecting the rotating speed of an automobile engine, which are applied to battery detection equipment, so that the battery detection equipment can detect the rotating speed of the automobile engine, the calculation process of the rotating speed of the engine can be simplified when the battery detection equipment detects the rotating speed of the automobile engine, and the detection speed of the rotating speed of the engine is increased.
The invention will now be illustrated by means of specific examples.
Fig. 1 is a schematic structural diagram of an implementation environment according to an embodiment of the present invention, where the implementation environment includes: the system comprises an engine 100, a generator 200, a storage battery 300 and a battery detection device 400, wherein the engine 100 is connected with the generator 200 through a belt pulley, the generator 200 is electrically connected with the storage battery 300, and the storage battery 300 is connected with the battery detection device 400 through a signal acquisition connecting line. Wherein, the signal acquisition connecting wire is a Kelvin four-wire clamp. It is to be understood that in embodiments of the present invention, the implementation environment is implemented within an automobile.
In this embodiment, when the engine 100 rotates, the engine 100 drives the generator 200 to rotate through the pulley, so that the generator 200 charges the battery 300; in the process that the generator 200 charges the storage battery 300, the charging voltage of the generator 200 includes a charging ripple signal, and therefore, the battery detection device 400 can collect the charging ripple signal on the storage battery 300 through the signal collection connection line when the generator 200 charges the storage battery 300.
Because the frequency of the charging voltage output by the generator 200 varies with the rotation speed of the generator 200, and the charging ripple signal included in the charging voltage output by the generator 200 is complementary to the charging voltage, the frequency of the charging ripple signal is related to the frequency of the charging voltage, and based on this, the rotation speed of the generator 200 can be determined according to the frequency of the charging ripple signal; in addition, the generator 200 rotates along with the rotation of the engine 100, so the rotation speed of the generator 200 is related to the rotation speed of the engine 100, and based on this, the rotation speed of the engine 100 can be determined according to the frequency of the charging ripple signal, so in the embodiment of the present invention, after the battery detection device 400 collects the charging ripple signal, the battery detection device can detect the rotation speed of the automobile engine according to the frequency of the charging ripple signal, that is, the charging ripple frequency.
Specifically, the battery test apparatus 400 includes: the sampling circuit 410 and the controller 420, the input end of the sampling circuit 410 is connected with the storage battery 300 through a signal acquisition connecting line, and the output end of the sampling circuit 410 is electrically connected with the controller 420.
The sampling circuit 410 is configured to collect a charging ripple signal of the storage battery 300 when the generator 200 charges the storage battery 300; the controller 420 is used for executing a method for detecting the rotational speed of the engine of the vehicle, so as to detect the rotational speed of the engine of the vehicle according to the charging ripple signal collected by the sampling circuit 410, specifically, when the engine 100 is in an idle state, the controller 420 determines a conversion ratio between the rotational speed of the engine and the charging ripple frequency, then, the current charging ripple frequency of the storage battery 300 is obtained through the sampling circuit 410, and the current rotational speed of the engine of the vehicle is calculated according to the current charging ripple frequency and the conversion ratio, because the controller 420 can calculate the current rotational speed of the engine of the vehicle only according to the current charging ripple frequency and the conversion ratio, compared with a scheme of calculating the rotational speed of the engine through a plurality of intermediate parameters such as the number of magnetic poles of a generator and a rotor, the number of generating phases of the generator, the rotational speed ratio of the generator and the engine, the detection speed of the engine speed is increased.
Further, the sampling circuit 410 includes: the input end of the signal processor 411 is connected with the storage battery 300 through a signal acquisition connecting line, the output end of the signal processor 411 is electrically connected with the input end of the band-pass filter 412, and the output end of the band-pass filter 412 is electrically connected with the controller 420.
The signal processor 411 is configured to collect a charging signal of the storage battery 300 and perform reduction processing on the charging signal when the generator 200 charges the storage battery 300; the band-pass filter 412 is used for filtering the charging signal processed by the signal processor 411 to obtain a charging ripple signal.
The controller 420 includes: a memory 421 and a processor 422.
The memory 421 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, instructions, and modules.
The memory 421 may include a program storage area and a data storage area. The storage program area can store an operating system and an application program required by at least one function; the storage data area may store data created according to use of the electronic device, etc., and may also store preset data.
Further, the memory 421 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.
In some embodiments, the memory 421 may optionally include memory remotely located from the processor 422, which may be connected to the electronic device via a network. Such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The processor 422 is a control center of the controller 420, and can connect various parts of the entire controller 420 by using various interfaces and lines, execute various functions of the controller 420 and process data by operating or executing nonvolatile software programs, instructions and modules stored in the memory 421 and calling data stored in the memory 421, thereby performing overall control on the controller 420, for example, implementing the method for detecting the rotational speed of the engine of the vehicle according to any embodiment of the present invention.
The processor 422 may be one or more, and one processor 422 is illustrated in fig. 2.
The processor 422 and the memory 421 may be connected by a bus or other means, and fig. 2 illustrates the connection by the bus as an example.
Processor 422 may include a Central Processing Unit (CPU), Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA), or the like. Processor 422 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
It can be understood that, in the embodiment of the present invention, the battery detection device 400 is connected to the storage battery 300, and when the generator 200 charges the storage battery 300, the charging ripple signal of the storage battery 300 is collected, so as to detect the engine speed of the automobile according to the collected charging ripple signal, thereby simplifying the calculation process of the engine speed and increasing the detection speed of the engine speed.
Further, please refer to fig. 3, which is a flowchart illustrating a method for detecting a rotational speed of an engine of an automobile according to an embodiment of the present invention, wherein the method for detecting a rotational speed of an engine of an automobile is applied to the battery detection apparatus 400, and as a specific implementation manner thereof, the method for detecting a rotational speed of an engine of an automobile is executed by the controller 420 to simplify a calculation process of the rotational speed of the engine and increase a detection speed of the rotational speed of the engine.
Specifically, the method for detecting the rotating speed of the automobile engine comprises the following steps:
s100: when the engine of the automobile is in an idling state, the conversion ratio of the engine speed of the automobile to the charging ripple frequency is determined.
The "idling state" is a state in which the engine of the automobile is idling, and when the engine of the automobile is running and the accelerator pedal of the automobile is completely released, it is determined that the engine of the automobile is idling.
Because the engine of car when operation drives the generator and charges for the battery for battery check out test set can gather the ripple signal that charges from the battery, consequently, as one of them concrete implementation, if the controller detects when accelerator pedal loosens completely, receives the ripple signal that charges, then confirms that the engine of car is in the idle speed state, and at this moment, the controller confirms the conversion ratio of the engine speed of car and the ripple frequency that charges.
Specifically, when the conversion ratio of the engine speed and the charging ripple frequency of the automobile is determined, the idle speed charging ripple frequency of the storage battery is obtained, the idle speed of the automobile is determined, and the conversion ratio of the engine speed and the charging ripple frequency is determined according to the idle speed charging ripple frequency and the idle speed.
The charging ripple frequency is the frequency of a charging ripple signal generated in the process of charging the storage battery by the generator.
The idle charging ripple frequency is the frequency of a charging ripple signal generated in the process that the engine drives the generator to charge the storage battery in the idle state, and the rotating speed of the engine in the idle state is the idle rotating speed, so the idle charging ripple frequency and the idle rotating speed have a corresponding relation, that is, when the charging ripple frequency is the idle charging ripple frequency, the rotating speed of the engine is the idle rotating speed, and on the basis, the conversion ratio of the rotating speed of the engine and the charging ripple frequency can be determined according to the idle charging ripple frequency and the idle rotating speed.
The controller determines the charging ripple frequency collected when an engine of the automobile is in an idling state as the idling charging ripple frequency. Specifically, after the controller obtains an idle charging ripple signal when an engine of the automobile is in an idle state through a band-pass filter, the controller performs fourier transform on the idle charging ripple signal to obtain the frequency of the idle charging ripple signal, and the frequency of the idle charging ripple signal is the idle charging ripple frequency.
The idle speed is stored in the memory in advance, and the controller can acquire the idle speed of the automobile from the memory. Preferably, in the embodiment of the invention, the idle speed is 800 r/min.
In some embodiments, the idle speed is different according to different automobile models, at this time, a corresponding relation table between the automobile models and the idle speed is pre-established in the memory, so that different automobile models correspond to different idle speeds, and based on this, when determining the idle speed of the automobile, the controller can search the corresponding relation table according to the automobile models to determine the idle speed matched with the automobile models as the idle speed of the detected automobile.
The controller determines a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to the charging ripple frequency.
It is understood that, before the step of determining that the engine of the automobile is in the idle state by the controller, the controller sends a first prompt message to the user according to a first detection signal triggered by the user, wherein the first prompt message is used for indicating the user to control the engine of the automobile to be in the idle state. At the moment, the user can start the engine to run according to the first prompt message, and keep the accelerator pedal completely loosened, so that the engine of the automobile is in an idling state. For example, when a user needs to detect the rotating speed of an automobile engine, a first rotating speed detection button is triggered through vehicle-mounted equipment, when the first rotating speed detection button is triggered, a controller receives a corresponding first detection signal, at the moment, the controller sends first prompt information to the user according to the first detection signal triggered by the user to indicate the user to control the engine of the automobile to be in an idle state, and the first prompt information can be 'please control the automobile to be in the idle state' and/or 'start the engine and keep an accelerator pedal completely relaxed' and the like.
After the controller finishes sending the first prompt message, the controller determines whether the engine of the automobile is in an idle state, determines the conversion ratio of the engine speed of the automobile to the charging ripple frequency when the controller determines that the engine of the automobile is in the idle state, and sends a second prompt message to the user after the conversion ratio is determined, wherein the second prompt message is used for prompting the user to enter a detection mode. At this time, the user can normally drive the automobile.
S200: acquiring the current charging ripple frequency of the storage battery;
s300: and calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
And after the controller sends second prompt information to the user, the controller enters a detection mode, and the controller acquires the current charging ripple frequency of the storage battery in the detection mode.
As a specific implementation manner, the controller acquires the current charging ripple frequency of the storage battery in real time in the detection mode, and calculates the current engine speed of the automobile in real time according to the current charging ripple frequency and the conversion ratio acquired in real time.
For example, the controller acquires the current charging ripple frequency f1 of the storage battery at the time t1, and calculates the current engine speed r1 of the automobile at the time t1 according to the current charging ripple frequency f1 and the conversion ratio x; and the controller acquires the current charging ripple frequency f2 of the storage battery at the time t2, and then calculates the current engine speed r2 of the automobile at the time t2 according to the current charging ripple frequency f2 and the conversion ratio x.
As another specific implementation manner, the controller obtains the current charging ripple frequency of the storage battery according to the second detection signal triggered by the user in the detection mode, and calculates the current engine speed of the automobile when the user triggers the second detection signal according to the current charging ripple frequency and the conversion ratio.
For example, when a user needs to detect the engine speed when the accelerator pedal is fully stepped, the user triggers a second speed detection button through the vehicle-mounted device after fully stepping the accelerator pedal, when the second speed detection button is triggered, the controller receives a corresponding second detection signal, at this time, the controller obtains the current charging ripple frequency f3 of the storage battery according to the second detection signal triggered by the user, and calculates the engine speed of the automobile when the accelerator pedal is fully stepped according to the current charging ripple frequency f3 and the conversion ratio x, wherein the current charging ripple frequency f3 is the charging ripple frequency when the accelerator pedal is fully stepped; when a user needs to detect the engine speed when the accelerator pedal is half-stepped, the user triggers the second speed detection button through the vehicle-mounted equipment after the accelerator pedal is half-stepped, when the second speed detection button is triggered, the controller receives a corresponding second detection signal, at the moment, the controller acquires the current charging ripple frequency f4 of the storage battery according to the second detection signal triggered by the user, and calculates the engine speed of the automobile when the accelerator pedal is half-stepped according to the current charging ripple frequency f4 and the conversion ratio x, wherein the current charging ripple frequency f4 is the charging ripple frequency when the accelerator pedal is half-stepped.
It is understood that the controller recognizes the second detection signal received after the second prompt message is sent as a valid detection signal.
In the embodiment of the invention, when the current charging ripple frequency of the storage battery is obtained, the current charging ripple signal of the storage battery is obtained through the band-pass filter, and the current charging ripple signal is subjected to Fourier transform to obtain the current charging ripple frequency.
The formula for calculating the current engine speed is:
wherein r is the current engine speed, f is the current charging ripple frequency, and x is the conversion ratio of the engine speed and the charging ripple frequency.
It can be understood that, in the embodiment of the present invention, after the conversion ratio between the engine speed and the charging ripple frequency of the automobile is determined when the engine of the automobile is in the idle state, the current engine speed of the automobile is calculated according to the obtained current charging ripple frequency of the storage battery and the determined conversion ratio, so that the calculation process of the engine speed can be simplified, and the detection speed of the engine speed can be increased.
Further, please refer to fig. 4, which is a schematic structural diagram of an automobile engine speed detection apparatus according to an embodiment of the present invention, the automobile engine speed detection apparatus can be applied to the battery detection device 400, and as a specific implementation manner thereof, functions of each module of the automobile engine speed detection apparatus are executed by the controller 420, so as to simplify a calculation process of an engine speed and improve a detection speed of the engine speed.
The term "module" as used below is a combination of software and/or hardware that can implement a predetermined function. Although the means described in the following embodiments may be implemented in software, an implementation in hardware or a combination of software and hardware is also conceivable.
Specifically, the apparatus for detecting the rotational speed of an automobile engine includes:
the determination module 10 is used for determining a conversion ratio of the engine speed and the charging ripple frequency of the automobile when the engine of the automobile is in an idle state;
an obtaining module 20, configured to obtain a current charging ripple frequency of the storage battery;
and the calculating module 30 is configured to calculate a current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
In some embodiments, the determination module 10 is specifically configured to:
when an engine of the automobile is in an idling state, acquiring an idling charging ripple frequency of the storage battery;
determining an idle speed of the vehicle;
and determining the conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed.
In some embodiments, the determination module 10 is specifically configured to:
determining a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to a charging ripple frequency.
In some embodiments, the obtaining module 20 is specifically configured to:
acquiring a current charging ripple signal of the storage battery through a band-pass filter;
and carrying out Fourier transform on the current charging ripple signal to obtain the current charging ripple frequency.
Since the apparatus embodiment and the method embodiment are based on the same concept, the contents of the apparatus embodiment may refer to the method embodiment on the premise that the contents do not conflict with each other, and are not described in detail herein.
It can be understood that, in the embodiment of the present invention, after the conversion ratio between the engine speed and the charging ripple frequency of the automobile is determined when the engine of the automobile is in the idle state, the current engine speed of the automobile is calculated according to the obtained current charging ripple frequency of the storage battery and the determined conversion ratio, so that the calculation process of the engine speed can be simplified, and the detection speed of the engine speed can be increased.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium storing computer-executable instructions, which are executed by one or more processors, such as the processor 422 in fig. 2, to enable the computer to perform the steps of a method for detecting a rotational speed of an automobile engine in any of the above-mentioned method embodiments, or to implement the functions of the modules of a device for detecting a rotational speed of an automobile engine in any of the above-mentioned device embodiments.
Embodiments of the present invention also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by one or more processors, such as the processor 422 in fig. 2, cause the computer to perform the steps of a method for detecting a rotational speed of an automobile engine in any of the above-mentioned method embodiments, or to implement the functions of the modules of a device for detecting a rotational speed of an automobile engine in any of the above-mentioned device embodiments.
The above-described embodiments of the apparatus are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments may be implemented by software plus a general hardware platform, and may also be implemented by hardware. 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 may be implemented by hardware associated with computer program instructions, and that the programs may be stored in a computer readable storage medium, and when executed, may include processes 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), or the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. A method for detecting the rotating speed of an automobile engine is characterized by being applied to a battery detection device, wherein the battery detection device is connected with a storage battery of the automobile, and the method comprises the following steps:
determining a conversion ratio of an engine speed to a charging ripple frequency of the automobile when an engine of the automobile is in an idle state;
acquiring the current charging ripple frequency of the storage battery;
and calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
2. The method for detecting the engine speed of the automobile according to claim 1, wherein the determining the conversion ratio of the engine speed of the automobile to the charging ripple frequency specifically comprises:
when an engine of the automobile is in an idling state, acquiring an idling charging ripple frequency of the storage battery;
determining an idle speed of the vehicle;
and determining the conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed.
3. The method for detecting the engine speed of the automobile according to claim 2, wherein the determining the conversion ratio of the engine speed to the charging ripple frequency according to the idle charging ripple frequency and the idle speed specifically comprises:
determining a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to a charging ripple frequency.
4. The method for detecting the rotational speed of the engine of the automobile according to any one of claims 1 to 3, wherein the obtaining of the current charging ripple frequency of the battery specifically includes:
acquiring a current charging ripple signal of the storage battery through a band-pass filter;
and carrying out Fourier transform on the current charging ripple signal to obtain the current charging ripple frequency.
5. The automobile engine speed detection method according to any one of claims 1 to 4, characterized in that the calculation formula of the current engine speed is:
wherein r is the current engine speed, f is the current charging ripple frequency, and x is the conversion ratio of the engine speed and the charging ripple frequency.
6. The utility model provides an automobile engine rotational speed detection device which characterized in that is applied to battery check out test set, battery check out test set with the battery of car is connected, includes:
the determining module is used for determining a conversion ratio of the engine speed and the charging ripple frequency of the automobile when the engine of the automobile is in an idle state;
the acquisition module is used for acquiring the current charging ripple frequency of the storage battery;
and the calculation module is used for calculating the current engine speed of the automobile according to the current charging ripple frequency and the conversion ratio.
7. The apparatus for detecting the rotational speed of an automobile engine according to claim 6, wherein the determining module is specifically configured to:
when an engine of the automobile is in an idling state, acquiring an idling charging ripple frequency of the storage battery;
determining an idle speed of the vehicle;
and determining the conversion ratio of the engine speed and the charging ripple frequency according to the idle charging ripple frequency and the idle speed.
8. The apparatus for detecting the rotational speed of an automobile engine according to claim 7, wherein the determining module is specifically configured to:
determining a ratio of the idle charging ripple frequency to the idle speed as a conversion ratio of the engine speed to a charging ripple frequency.
9. The apparatus according to any one of claims 6 to 8, wherein the acquisition module is specifically configured to:
acquiring a current charging ripple signal of the storage battery through a band-pass filter;
and carrying out Fourier transform on the current charging ripple signal to obtain the current charging ripple frequency.
10. A battery test device for connection to a battery of an automobile, the battery test device comprising:
the sampling circuit is connected with the storage battery through a signal acquisition connecting wire; and the number of the first and second groups,
the controller is electrically connected with the sampling circuit;
wherein the controller comprises at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor;
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 5.
11. The battery test apparatus of claim 10, wherein the signal acquisition connection is a kelvin four wire clamp.
12. The battery test apparatus of claim 10 or 11, wherein the sampling circuit comprises:
the input end of the band-pass filter is connected with the storage battery, and the output end of the band-pass filter is connected with the controller.
13. The battery test apparatus of claim 12, wherein the sampling circuit further comprises:
and the input end of the signal processor is connected with the storage battery, and the output end of the signal processor is connected with the input end of the band-pass filter.
14. A non-transitory computer-readable storage medium storing computer-executable instructions for causing a controller to perform the method of any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010676997.8A CN111766395B (en) | 2020-07-14 | 2020-07-14 | Automobile engine rotating speed detection method and device and battery detection equipment |
| PCT/CN2021/105980 WO2022012514A1 (en) | 2020-07-14 | 2021-07-13 | Method and apparatu for measuring engine revolution speed of automobile, and battery test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010676997.8A CN111766395B (en) | 2020-07-14 | 2020-07-14 | Automobile engine rotating speed detection method and device and battery detection equipment |
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| CN111766395A true CN111766395A (en) | 2020-10-13 |
| CN111766395B CN111766395B (en) | 2022-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022012514A1 (en) * | 2020-07-14 | 2022-01-20 | 深圳市道通科技股份有限公司 | Method and apparatu for measuring engine revolution speed of automobile, and battery test device |
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| CN111766395B (en) | 2022-04-15 |
| WO2022012514A1 (en) | 2022-01-20 |
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