Signal acquisition system, signal processing method and vehicle
By splitting the control and guidance signals into different types and sampling them separately in the signal acquisition system, the problem of high hardware resource consumption in the existing technology is solved, and low-cost signal acquisition is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2026-02-02
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the CP signal sampling method during electric vehicle charging consumes a large amount of hardware resources, increasing vehicle costs.
By setting a signal splitting module in the signal acquisition system, the control and guidance signal is split into a first type of signal and a second type of signal, and each is sampled by a different sampling module, thus realizing the split acquisition of a single input interface.
This reduces the consumption of hardware resources and lowers application costs.
Smart Images
Figure CN122017411A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of vehicle charging technology, and in particular relates to a signal acquisition system, a signal processing method, and a vehicle. Background Technology
[0002] During the charging process of electric vehicles, communication between the charging station and the vehicle is achieved through Control and Guidance (CP) signals. CP signals typically contain information such as charging status and power demand, and the vehicle can sample the CP signals in real time to control the charging process. However, current CP signal sampling methods consume significant hardware resources, increasing vehicle costs. Summary of the Invention
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a signal acquisition system, a signal processing method, and a vehicle that have low hardware resource requirements and low application costs.
[0004] In a first aspect, this application provides a signal acquisition system, which includes: A signal splitting module is connected to the input interface of the signal acquisition system. The signal splitting module is used to split the control guidance signal into a first type of signal and a second type of signal. A first sampling module is connected to the signal splitting module. The first sampling module is used to sample the first type of signal to obtain a first sampling result. The second sampling module is connected to the signal splitting module. The second sampling module is used to sample the second type of signal to obtain a second sampling result.
[0005] According to the signal acquisition system provided in the embodiments of this application, by means of a signal splitting module set in the signal acquisition system, control guidance signals can be obtained from the input interface and split into different types of signals, namely, a first type of signal and a second type of signal. The signal acquisition system can realize the split acquisition of control guidance signals through a single input interface, which has low hardware resource occupation and low application cost.
[0006] According to one embodiment of this application, the signal splitting module includes: The first splitting submodule is connected to the first sampling module. The first splitting submodule is used to obtain the first type signal based on the control guidance signal and output the first type signal to the first sampling module. The second splitting submodule is connected to the second sampling module. The second splitting submodule is used to obtain the second type signal based on the control guidance signal and output the second type signal to the second sampling module.
[0007] According to one embodiment of this application, the first type of signal is a pulse modulation signal; The first splitting submodule includes: A first shaping circuit is used to shape the control guidance signal to obtain a first shaped signal; An operational amplifier is connected to the first shaping circuit. The operational amplifier is used to perform operations on the first shaped signal to obtain the first type of signal.
[0008] According to one embodiment of this application, the second type of signal is an analog voltage signal; The second splitting submodule includes: The second shaping circuit is used to shape the control guidance signal to obtain a second shaped signal. A resistor-capacitor circuit is connected to the second shaping circuit. The resistor-capacitor circuit is used to perform calculations on the second shaped signal to obtain the second type of signal.
[0009] According to one embodiment of this application, the system further includes: A processing module is connected to the first sampling module and the second sampling module, and the processing module is used to receive the first sampling result and / or the second sampling result.
[0010] According to one embodiment of this application, the system further includes: A data synchronization module is connected to the first sampling module and the second sampling module, and the data synchronization module is also connected to the processing module; The data synchronization module is used to receive the first sampling result and the second sampling result, and to perform synchronization processing on the first sampling result and the second sampling result to obtain the fused sampling result; The processing module is also used to receive the fused sampling results.
[0011] According to one embodiment of this application, the first sampling module is connected to the input interface of the signal acquisition system. The first sampling module is used to receive the control guidance signal and sample the control guidance signal to obtain the first sampling result. The second sampling module is connected to the input interface of the signal acquisition system. The second sampling module is used to receive the control guidance signal and sample the control guidance signal to obtain the second sampling result.
[0012] According to one embodiment of this application, the system further includes: An IO module is connected to the input interface, the first sampling module, the second sampling module, and the signal splitting module. The IO module is used to receive the control guidance signal input from the input interface and output the control guidance signal to at least one of the first sampling module, the second sampling module, and the signal splitting module.
[0013] Secondly, this application provides a signal processing method for a signal acquisition system, the signal acquisition system including a signal splitting module, a first sampling module and a second sampling module, the signal splitting module being connected to the input interface of the signal acquisition system, the first sampling module being connected to the signal splitting module, and the second sampling module being connected to the signal splitting module; The method includes: Acquire control and guidance signals and the acquisition mode of the signal acquisition system; Based on the control guidance signal and the acquisition mode, at least one of the signal splitting module, the first sampling module, and the first sampling module is controlled to process the control guidance signal.
[0014] According to the signal processing method provided in the embodiments of this application, by means of a signal splitting module set in the signal acquisition system, a control guidance signal can be obtained from the input interface and split into different types of signals, namely a first type signal and a second type signal. This signal processing method can realize the split acquisition of the control guidance signal through a single input interface, which has low hardware resource occupation and low application cost.
[0015] Thirdly, this application provides a vehicle comprising: The signal acquisition system as described in the first aspect.
[0016] According to the vehicle provided in the embodiments of this application, the control guidance signal can be obtained from the input interface through the signal splitting module set in the signal acquisition system, and the control guidance signal can be split into different types of signals, namely the first type signal and the second type signal. The vehicle can realize the split acquisition of the control guidance signal through a single input interface, which has low hardware resource occupation and low application cost.
[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is one of the structural schematic diagrams of the signal acquisition system provided in the embodiments of this application; Figure 2 This is a second schematic diagram of the signal acquisition system provided in the embodiments of this application; Figure 3 This is one of the flowcharts illustrating the signal processing method provided in the embodiments of this application; Figure 4 This is a second schematic flowchart of the signal processing method provided in the embodiments of this application.
[0019] Figure label: The system includes a signal acquisition system 100, a signal splitting module 110, a first splitting sub-module 111, a second splitting sub-module 112, a first sampling module 120, a second sampling module 130, a processing module 140, a data synchronization module 150, and an I / O module 160. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0022] The signal acquisition system 100 provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0023] This application provides a signal acquisition system 100.
[0024] like Figure 1 As shown, the signal acquisition system 100 includes a signal splitting module 110, a first sampling module 120, and a second sampling module 130.
[0025] The signal splitting module 110 is connected to the input interface of the signal acquisition system 100. The signal splitting module 110 is used by the signal acquisition system 100 to split the control and guidance signal into a first type of signal and a second type of signal.
[0026] In this embodiment, the input interface can be an interface for connecting the signal acquisition system 100 to an external device, and the input interface is used to receive input control and guidance signals.
[0027] The signal splitting module 110 is a functional module in the signal acquisition system 100 used to split control guidance signals. The input terminal of the signal splitting module 110 can be connected to the input interface. The signal splitting module 110 can receive the control guidance signals transmitted by the input interface and decompose the control guidance signals into different types of signals, namely, the first type of signal and the second type of signal.
[0028] In actual implementation, the signal acquisition system 100 can be used to acquire control pilot (CP) signals during the vehicle charging process. The CP signal can be used to control the vehicle charging process. The signal acquisition system 100 can be a microcontroller unit (MCU) installed in the vehicle, and the input interface can be the pins of the microcontroller unit.
[0029] In this embodiment, the first type signal and the second type signal are two different types of signals obtained after the control guidance signal is split by the signal splitting module 110. The first type signal and the second type signal will be transmitted to the corresponding sampling modules, that is, the first sampling module 120 and the second sampling module 130 for sampling.
[0030] The first sampling module 120 is connected to the signal splitting module 110. The first sampling module 120 is used to sample the first type of signal to obtain the first sampling result.
[0031] The second sampling module 130 is connected to the signal splitting module 110. The second sampling module 130 is used to sample the second type of signal to obtain the second sampling result.
[0032] In this embodiment, the first sampling result can be the result obtained by the first sampling module 120 after sampling the first type of signal, and the second sampling result can be the result obtained by the second sampling module 130 after sampling the second type of signal.
[0033] In actual implementation, the first sampling result and the second sampling result reflect different characteristics of the control guidance signal, such as duty cycle and voltage amplitude level. Based on the first sampling result and the second sampling result, the signal acquisition system 100 can realize multiple functions such as charging status detection, power control and fault diagnosis.
[0034] In this embodiment, by setting a signal splitting module 110 in the signal acquisition system 100, different types of signals, namely a first type signal and a second type signal, can be obtained based on the control guidance signal. The first type signal and the second type signal carry different features of the control guidance signal. Through the corresponding sampling modules in the signal acquisition system 100, namely the first sampling module 120 and the second sampling module 130, the different features of the control guidance signal can be extracted and sampled respectively to obtain the first sampling result and the second sampling result, thereby realizing different control functions based on different sampling results.
[0035] It should be noted that during the vehicle charging process, the charging pile and the vehicle communicate through the CP signal. The CP signal can be set and adjusted so that it can reflect different information related to the charging process through different characteristics.
[0036] For example, the duty cycle of the CP signal can reflect the vehicle's maximum charging current, or the voltage amplitude level of the CP signal can reflect the current charging connection status.
[0037] In related technologies, the CP signal can be divided into multiple different types of signals through multiple different analog circuits. Each signal can reflect one or more characteristics of the CP signal. Then, a corresponding input pin is set for each signal in the sampling circuit. Multiple different types of signals can be sampled separately to obtain various information carried by the original CP signal, thereby realizing different control functions.
[0038] However, this type of acquisition scheme consumes a lot of hardware resources, requiring multiple analog circuits and occupying multiple input pins, which increases the application cost.
[0039] In this embodiment, the signal splitting module 110 is directly installed in the signal acquisition system 100 and connected to the input interface. The signal splitting module 110 can obtain the control guidance signal from the input interface and split the control guidance signal to obtain different types of signals, namely, the first type signal and the second type signal. The first type signal and the second type signal can be sampled by the first sampling module 120 and the second sampling module 130 in the signal acquisition system 100 to obtain corresponding information. Through the signal splitting module 110, the first sampling module 120 and the second sampling module 130, the signal acquisition system 100 can realize the split acquisition of the control guidance signal through a single input interface, which has low hardware resource occupation and low application cost.
[0040] According to the signal acquisition system 100 provided in the embodiments of this application, the signal splitting module 110 provided in the signal acquisition system 100 can acquire control guidance signals from the input interface and split the control guidance signals to obtain different types of signals, namely, first type signals and second type signals. The signal acquisition system 100 can realize the split acquisition of control guidance signals through a single input interface, which has low hardware resource occupation and low application cost.
[0041] In some embodiments, such as Figure 2 As shown, the signal splitting module 110 includes a first splitting submodule 111 and a second splitting submodule 112.
[0042] In this embodiment, the first splitting submodule 111 and the second splitting submodule 112 are circuit components in the signal splitting module 110 used to process control guidance signals. The first splitting submodule 111 and the second splitting submodule 112 can acquire control guidance signals and obtain different types of signals after performing different processing, namely, the first type signal and the second type signal.
[0043] The first splitting submodule 111 is connected to the first sampling module 120. The first splitting submodule 111 is used to obtain a first type signal based on the control guidance signal and output the first type signal to the first sampling module 120.
[0044] The second splitting submodule 112 is connected to the second sampling module 130. The second splitting submodule 112 is used to obtain a second type of signal based on the control guidance signal and output the second type of signal to the second sampling module 130.
[0045] In actual implementation, the circuit structure of the first splitting submodule 111 and the second splitting submodule 112 can be determined based on the specific types of the first type signal and the second type signal, and this embodiment of the application does not limit it here.
[0046] In this embodiment, the signal splitting module 110 is provided with a first splitting submodule 111 and a second splitting submodule 112. The first splitting submodule 111 and the second splitting submodule 112 can process the control guidance signal to obtain a first type signal and a second type signal that can reflect different characteristics of the control guidance signal, respectively.
[0047] In some embodiments, the first type of signal is a pulse-modulated signal.
[0048] Among them, pulse-width modulation (PWM) signal can refer to a signal that encodes information by adjusting the pulse width. The change of the duty cycle of the pulse-width modulation signal can correspond to different data values.
[0049] In actual implementation, the pulse modulation signal determined based on the control guidance signal can reflect the duty cycle of the control guidance signal. The duty cycle of the control guidance signal is used to characterize the maximum output current of the charging pile. The higher the duty cycle of the control guidance signal, the greater the maximum output current of the charging pile.
[0050] In this embodiment, the first splitting submodule 111 includes a first shaping circuit and an operational amplifier.
[0051] The first shaping circuit is used to shape the control guide signal. The shaping process includes, but is not limited to, waveform adjustment, glitch filtering, noise elimination or distortion correction, so as to obtain the first shaped signal.
[0052] The input terminal of the operational amplifier is connected to the output terminal of the first shaping circuit. The operational amplifier is used to perform specific operations on the first shaped signal, including but not limited to amplification, integration, or differentiation, in order to extract effective pulse modulation signal components from the control guidance signal, thereby obtaining a first type of signal.
[0053] In actual operation, the operation amplifier can perform the following operations: if the voltage input to the operation amplifier is higher than a preset voltage threshold, the operation amplifier outputs a high voltage (e.g., 3.3V or 5V); if the voltage input to the operation amplifier is lower than a first preset voltage threshold, the operation amplifier outputs a low voltage (e.g., 0V).
[0054] In this embodiment, the first splitting submodule 111 shapes and calculates the control guide signal through a first shaping circuit and an operational amplifier to obtain a pulse modulation signal that reflects the duty cycle information of the control guide signal.
[0055] In some embodiments, the second type of signal is an analog voltage signal.
[0056] Analog voltage signal can refer to a continuously changing voltage signal, and the voltage amplitude of an analog voltage signal can correspond to different data values.
[0057] In actual operation, the analog voltage signal determined based on the control guide signal can reflect the voltage amplitude level of the control guide signal. The voltage amplitude level of the control guide signal is used to characterize the charging connection status. For example, 12V indicates that the charging gun is not connected, 9V indicates that the vehicle is ready to charge, and 6V indicates a fault or not ready.
[0058] In this embodiment, the second splitting submodule 112 includes a second shaping circuit and a resistor-capacitor circuit.
[0059] The second shaping circuit is used to shape the control guide signal. The shaping process includes, but is not limited to, waveform adjustment, glitch filtering, noise elimination or distortion correction, so as to obtain the second shaped signal.
[0060] The input of the resistor-capacitor (RC) circuit is connected to the output of the second shaping circuit. The RC circuit is used to perform specific operations on the second shaped signal to extract the effective analog voltage signal component from the control guide signal, thereby obtaining the second type of signal.
[0061] In actual implementation, the operation performed by the resistor-capacitor circuit can be as follows: if the voltage input to the resistor-capacitor circuit is higher than the second preset voltage threshold, the resistor-capacitor circuit stores electricity; if the voltage input to the resistor-capacitor circuit is lower than the second preset voltage threshold, the resistor-capacitor circuit discharges, so that the second shaped signal can output a stable voltage signal, i.e., an analog voltage signal, after passing through the resistor-capacitor circuit.
[0062] In this embodiment, the second splitting submodule 112 shapes and calculates the control guide signal through the second shaping circuit and the resistor-capacitor circuit, and can obtain an analog voltage signal that reflects the voltage amplitude level of the control guide signal.
[0063] In some embodiments, such as Figure 2 As shown, the signal acquisition system 100 also includes a processing module 140.
[0064] The processing module 140 is connected to the first sampling module 120 and the second sampling module 130, and the processing module 140 is used to receive the first sampling result and / or the second sampling result.
[0065] In actual implementation, the processing module 140 can be a central processing unit (CPU). After the first sampling module 120 completes sampling, it can store the first sampling result in the register of the first sampling module 120. After the second sampling module 130 completes sampling, it can store the second sampling result in the register of the second sampling module 130. The processing module 140 is connected to the first sampling module 120 and the second sampling module 130. During the charging process, the processing module 140 can retrieve the sampling results in the registers of the first sampling module 120 and the second sampling module 130, that is, the first sampling result and / or the second sampling result, so as to realize the subsequent corresponding control functions, such as determining the maximum output current based on the first sampling result and controlling the real-time charging current based on the maximum output current.
[0066] It is understood that the processing module 140 may acquire only the first sampling result, or only the second sampling result, or acquire both the first and second sampling results simultaneously. The specific acquisition method can be determined according to actual needs, and this embodiment of the application does not limit it here.
[0067] In this embodiment, the processing module 140 is connected to the first sampling module 120 and the second sampling module 130, and is used to receive the first sampling result and / or the second sampling result, thereby realizing the corresponding control function.
[0068] In some embodiments, such as Figure 2 As shown, the signal acquisition system 100 also includes a data synchronization module 150.
[0069] The data synchronization module 150 is connected to the first sampling module 120 and the second sampling module 130, and the data synchronization module 150 is also connected to the processing module 140.
[0070] In actual implementation, the data synchronization module 150 may have a first input terminal and a second input terminal. The first input terminal of the data synchronization module 150 is connected to the first sampling module 120, the second input terminal of the data synchronization module 150 is connected to the second sampling module 130, and the output terminal of the data synchronization module is connected to the processing module 140.
[0071] In this embodiment, the data synchronization module 150 can be a functional module in the signal acquisition system 100 responsible for aligning the timing of the first sampling result and the second sampling result. The data synchronization module 150 is used to receive the first sampling result and the second sampling result, and to perform synchronization processing on the first sampling result and the second sampling result to obtain the fused sampling result. The fused sampling result includes the first sampling result and the second sampling result after timing synchronization, and the data synchronization is high.
[0072] In this embodiment, the processing module 140 is also used to receive the fused sampling results.
[0073] In actual execution, the processing module 140 can send a sampling request to the data synchronization module 150. After receiving the sampling request, the data synchronization module 150 can obtain the first sampling result through the first sampling module 120 and the second sampling result through the second sampling module 130. Then, it can perform synchronization processing on the first sampling result and the second sampling result to obtain the fused sampling result, and send the fused sampling result to the processing module 140 to realize the corresponding control function.
[0074] In this embodiment, the signal acquisition system 100 is provided with a data synchronization module 150. The data synchronization module 150 can receive the first sampling result and the second sampling result, and perform synchronization processing on the first sampling result and the second sampling result to obtain a fused sampling result. The fused sampling result includes the first sampling result and the second sampling result after time synchronization. The data synchronization module 150 can enhance data synchronization, make the attributes of the sampling result more comprehensive, and facilitate subsequent data processing and analysis.
[0075] In some embodiments, the first sampling module 120 is connected to the input interface of the signal acquisition system 100. The first sampling module 120 is used to receive control guidance signals and sample the control guidance signals to obtain a first sampling result.
[0076] In actual operation, the first sampling module 120 has two working modes. In the first working mode, the first sampling module 120 is connected to the input interface of the signal acquisition system 100 and can receive control guidance signals through the input interface and directly sample the control guidance signals to obtain the first sampling result. In the second working mode, the first sampling module 120 is connected to the signal splitting module 110 and can receive the split first type signal through the signal splitting module 110 and sample the first type signal to obtain the first sampling result. The first sampling module 120 can switch between the two working modes according to actual needs.
[0077] In this embodiment, the second sampling module 130 is connected to the input interface of the signal acquisition system 100. The second sampling module 130 is used to receive the control guidance signal and sample the control guidance signal to obtain the second sampling result.
[0078] In actual operation, the second sampling module 130 has two working modes. In the first working mode, the second sampling module 130 is connected to the input interface of the signal acquisition system 100 and can receive control guidance signals through the input interface and directly sample the control guidance signals to obtain the second sampling result. In the second working mode, the second sampling module 130 is connected to the signal splitting module 110 and can receive the split second type signal through the signal splitting module 110 and sample the second type signal to obtain the second sampling result. The second sampling module 130 can switch between the two working modes according to actual needs.
[0079] In this embodiment, the input interface is connected to the first sampling module 120 and the second sampling module 130. The first sampling module 120 and the second sampling module 130 can directly obtain the control guidance signal through the input interface, or they can obtain the first type signal and the second type signal by splitting the control guidance signal through the signal splitting module 110. The working mode is flexible and adjustable, which increases the applicability of the signal acquisition system 100.
[0080] In some embodiments, such as Figure 2As shown, the signal acquisition system 100 also includes an IO module 160, which is connected to the input interface, the first sampling module 120, the second sampling module 130 and the signal splitting module 110. The IO module 160 is used to receive the control guidance signal input from the input interface and output the control guidance signal to at least one of the first sampling module 120, the second sampling module 130 and the signal splitting module 110.
[0081] In this embodiment, the input terminal of the IO module 160 is connected to the input interface, and the output terminal of the IO module 160 is connected to the first sampling module 120, the second sampling module 130 and the signal splitting module 110 respectively. The IO module 160 can selectively output control guidance signals to at least one of the first sampling module 120, the second sampling module 130 and the signal splitting module 110 according to the acquisition mode of the signal acquisition system 100.
[0082] For example, when the acquisition mode of the signal acquisition system 100 is the first acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the first sampling module 120. The first sampling module 120 directly samples the control guidance signal, obtains the first sampling result, and sends it to the processing module 140.
[0083] For example, when the acquisition mode of the signal acquisition system 100 is the second acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the second sampling module 130. The second sampling module 130 directly samples the control guidance signal, obtains the second sampling result, and sends it to the processing module 140.
[0084] For example, when the acquisition mode of the signal acquisition system 100 is synchronous acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the signal splitting module 110. The signal splitting module 110 splits the control guidance signal into a first type signal and a second type signal through the first splitting sub-module 111 and the second splitting sub-module 112, respectively. The first type signal is output to the first sampling module 120 to obtain the first sampling result, and the second type signal is output to the second sampling module 130 to obtain the second sampling result. Then, the first sampling result and the second sampling result are output to the data synchronization module 150 to obtain the fused sampling result and then sent to the processing module 140.
[0085] In this embodiment, the IO module 160 can selectively output the control guidance signal to at least one of the first sampling module 120, the second sampling module 130, and the signal splitting module 110 according to the acquisition mode of the signal acquisition system 100. By setting the IO module 160 in the signal acquisition system 100, the output target of the control guidance signal can be flexibly adjusted, which increases the applicability of the signal acquisition system 100.
[0086] This application also provides a signal processing method.
[0087] It should be noted that the signal processing method is used in the signal acquisition system 100, which includes a signal splitting module 110, a first sampling module 120, and a second sampling module 130. The signal splitting module 110 is connected to the input interface of the signal acquisition system 100, the first sampling module 120 is connected to the signal splitting module 110, and the second sampling module 130 is connected to the signal splitting module 110.
[0088] like Figure 3 As shown, the signal processing method includes steps 310 and 320.
[0089] Step 310: Acquire control and guidance signals and the acquisition mode of signal acquisition system 100.
[0090] In this step, the acquisition modes of the signal acquisition system 100 may include a first acquisition mode, a second acquisition mode, and a synchronous acquisition mode.
[0091] Step 320: Based on the control guidance signal and the acquisition mode, at least one of the control signal splitting module 110, the first sampling module 120 and the first sampling module 120 processes the control guidance signal.
[0092] In this step, when the sampling mode of the signal acquisition system 100 is the first acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the first sampling module 120. The first sampling module 120 directly samples the control guidance signal to obtain the first sampling result.
[0093] When the acquisition mode of the signal acquisition system 100 is the second acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the second sampling module 130. The second sampling module 130 directly samples the control guidance signal to obtain the second sampling result.
[0094] When the acquisition mode of the signal acquisition system 100 is synchronous acquisition mode, the IO module 160 acquires the control guidance signal through the input interface and outputs the control guidance signal to the signal splitting module 110. The signal splitting module 110 splits the control guidance signal into a first type signal and a second type signal through the first splitting sub-module 111 and the second splitting sub-module 112, respectively. The first type signal is output to the first sampling module 120 to obtain the first sampling result, and the second type signal is output to the second sampling module 130 to obtain the second sampling result.
[0095] According to the signal processing method provided in the embodiments of this application, the signal splitting module 110 set in the signal acquisition system 100 can obtain the control guidance signal from the input interface and split the control guidance signal to obtain different types of signals, namely the first type signal and the second type signal. This signal processing method can realize the split acquisition of the control guidance signal through a single input interface, which has low hardware resource occupation and low application cost.
[0096] In some embodiments, based on the control guidance signal and the acquisition mode, at least one of the control signal splitting module 110, the first sampling module 120, and the first sampling module 120 processes the control guidance signal, including: When the acquisition mode is the first acquisition mode, the first sampling module 120 is controlled to sample the control guidance signal to obtain the first sampling result.
[0097] In some embodiments, based on the control guidance signal and the acquisition mode, at least one of the control signal splitting module 110, the first sampling module 120, and the first sampling module 120 processes the control guidance signal, including: When the acquisition mode is the second acquisition mode, the control second sampling module 130 samples the control guidance signal to obtain the first sampling result.
[0098] In some embodiments, based on the control guidance signal and the acquisition mode, at least one of the control signal splitting module 110, the first sampling module 120, and the first sampling module 120 processes the control guidance signal, including: When the acquisition mode is synchronous acquisition mode, the control signal splitting module 110 splits the control guidance signal into a first type of signal and a second type of signal; The first sampling module 120 is controlled to sample the first type of signal to obtain the first sampling result; The second sampling module 130 is controlled to sample the second type of signal to obtain the second sampling result.
[0099] The following is a specific implementation example using the signal acquisition system 100 as an MCU chip.
[0100] The MCU chip includes an IO module 160, a PWM sampling module (first sampling module 120), an ADC (Analog-to-Digital Converter) module (second sampling module 130), a signal splitting module 110, a data synchronization module 150, and a CPU (processing module 140).
[0101] The input port of IO module 160 is connected to the pin (input interface) of the microcontroller chip MCU, and the output port of IO module 160 is connected to the PWM sampling module, ADC module, and signal splitting module 110.
[0102] The input port of the PWM sampling module is connected to the IO module 160, the signal splitting module 110, the data synchronization module 150 and the CPU, and the output port of the PWM sampling module is connected to the data synchronization module 150 and the CPU.
[0103] The input port of the ADC module is connected to the IO module 160, the signal splitting module 110, the data synchronization module 150, and the CPU. The output port of the ADC module is connected to the data synchronization module 150 and the CPU. The input port of the signal splitting module 110 is connected to the IO module 160, and the output port of the signal splitting module 110 is connected to the PWM sampling module and the ADC module.
[0104] The input port of the data synchronization module 150 is connected to the PWM sampling module, the ADC module and the CPU, and the output port of the data synchronization module 150 is connected to the CPU.
[0105] When it is necessary to acquire the duty cycle and voltage amplitude information of an external CP signal (frequency range 970Hz~1030Hz, duty cycle range 0%~100%, voltage range -12V~12V), the CP signal can first be filtered out of negative voltage by a diode, and then passed through a voltage divider circuit (using a resistor of 1kΩ~2kΩ depending on the actual situation) so that the CP signal with a maximum amplitude of 3.3V or 5V (depending on the chip's reference voltage) is input to the MCU pin.
[0106] After the CP signal is input to the MCU pin, as follows: Figure 4 As shown, the first step is to determine which acquisition mode to use for the CP signal. If it is the PWM acquisition mode (i.e. the first acquisition mode), the CP signal is routed to the PWM sampling module. The PWM sampling module starts signal sampling, obtains the first sampling result, and outputs the first sampling result to the CPU.
[0107] If it is in ADC acquisition mode (i.e., second acquisition mode), the input signal is routed to the ADC module, the ADC module starts signal sampling, obtains the second sampling result, and outputs the second sampling result to the CPU.
[0108] If it is a synchronous acquisition mode, the CP signal is routed to the signal splitting module 110. The signal splitting module 110 splits the signal into one PWM output (first type signal) and one analog level output (second type signal), and routes the two signals to the PWM sampling module and the ADC module respectively.
[0109] The PWM sampling module starts signal sampling, obtains the first sampling result, and outputs the first sampling result to the data synchronization module 150. The data synchronization module 150 merges the data from the PWM sampling module and the ADC module and outputs the data to the CPU.
[0110] This application also provides a vehicle that includes the signal acquisition system 100 as described above.
[0111] According to the vehicle provided in the embodiments of this application, the signal splitting module 110 set in the signal acquisition system 100 can obtain control guidance signals from the input interface and split the control guidance signals to obtain different types of signals, namely, the first type of signal and the second type of signal. The vehicle can realize the split acquisition of control guidance signals through a single input interface, which has low hardware resource occupation and low application cost.
[0112] The signal acquisition system 100 in this embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be an in-vehicle electronic device, a server, or a computer, etc., and this embodiment does not specifically limit its functionality.
[0113] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
[0114] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.
[0115] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
[0116] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0117] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A signal acquisition system, characterized in that, include: A signal splitting module is connected to the input interface of the signal acquisition system. The signal splitting module is used to split the control guidance signal into a first type of signal and a second type of signal. A first sampling module is connected to the signal splitting module. The first sampling module is used to sample the first type of signal to obtain a first sampling result. The second sampling module is connected to the signal splitting module. The second sampling module is used to sample the second type of signal to obtain a second sampling result.
2. The signal acquisition system according to claim 1, characterized in that, The signal splitting module includes: The first splitting submodule is connected to the first sampling module. The first splitting submodule is used to obtain the first type signal based on the control guidance signal and output the first type signal to the first sampling module. The second splitting submodule is connected to the second sampling module. The second splitting submodule is used to obtain the second type signal based on the control guidance signal and output the second type signal to the second sampling module.
3. The signal acquisition system according to claim 2, characterized in that, The first type of signal is a pulse-modulated signal; The first splitting submodule includes: A first shaping circuit is used to shape the control guidance signal to obtain a first shaped signal; An operational amplifier is connected to the first shaping circuit. The operational amplifier is used to perform operations on the first shaped signal to obtain the first type of signal.
4. The signal acquisition system according to claim 2, characterized in that, The second type of signal is an analog voltage signal; The second splitting submodule includes: The second shaping circuit is used to shape the control guidance signal to obtain a second shaped signal. A resistor-capacitor circuit is connected to the second shaping circuit. The resistor-capacitor circuit is used to perform calculations on the second shaped signal to obtain the second type of signal.
5. The signal acquisition system according to any one of claims 1-4, characterized in that, Also includes: A processing module is connected to the first sampling module and the second sampling module, and the processing module is used to receive the first sampling result and / or the second sampling result.
6. The signal acquisition system according to claim 5, characterized in that, Also includes: A data synchronization module is connected to the first sampling module and the second sampling module, and the data synchronization module is also connected to the processing module; The data synchronization module is used to receive the first sampling result and the second sampling result, and to perform synchronization processing on the first sampling result and the second sampling result to obtain the fused sampling result; The processing module is also used to receive the fused sampling results.
7. The signal acquisition system according to any one of claims 1-4, characterized in that, The first sampling module is connected to the input interface of the signal acquisition system. The first sampling module is used to receive the control guidance signal and sample the control guidance signal to obtain the first sampling result. The second sampling module is connected to the input interface of the signal acquisition system. The second sampling module is used to receive the control guidance signal and sample the control guidance signal to obtain the second sampling result.
8. The signal acquisition system according to any one of claims 1-4, characterized in that, Also includes: An IO module is connected to the input interface, the first sampling module, the second sampling module, and the signal splitting module. The IO module is used to receive the control guidance signal input from the input interface and output the control guidance signal to at least one of the first sampling module, the second sampling module, and the signal splitting module.
9. A signal processing method, characterized in that, The method is used in a signal acquisition system, which includes a signal splitting module, a first sampling module, and a second sampling module. The signal splitting module is connected to the input interface of the signal acquisition system, the first sampling module is connected to the signal splitting module, and the second sampling module is connected to the signal splitting module. The method includes: Acquire control and guidance signals and the acquisition mode of the signal acquisition system; Based on the control guidance signal and the acquisition mode, at least one of the signal splitting module, the first sampling module, and the first sampling module is controlled to process the control guidance signal.
10. A vehicle, characterized in that, include: The signal acquisition system as described in claims 1-8.