A signal processing system

Abstract

The present application provides a signal processing system, characterized in that the system includes: a plurality of sub-signal processing modules, the input end of each sub-signal processing module communicates with the output end of a vehicle component, and is used for normalizing the output signal of the vehicle component, wherein the output signals of different vehicle components are different, and are respectively voltage signals, current signals and temperature signals; a plurality of sub-interface modules, the input end of each sub-interface module communicates with the output end of a sub-signal processing module, and is used for sending the output signal of the sub-signal processing module to a sub-partition of the DSP chip, wherein each sub-interface module corresponds to a sub-partition of the DSP chip. The present application improves the clarity and logic of the PCB board wiring.

Description

Technical Field

[0001] This application relates to the field of circuit technologies, and particularly to a signal processing system. Background Art

[0002] In recent years, in new energy electric vehicles, a large number of vehicle signals need to be collected. For example, the vehicle control unit (VCU) needs to collect various gear signals and pedal signals, the motor control unit (MCU) will collect motor temperature signals and bus voltage signals, and the battery management system (BMS) will collect battery cell voltage signals, etc. For a mature new energy vehicle electronic control system, the huge input signals are often one of the main factors affecting the PCB board drawing efficiency. Attached Figure 1 As a signal processing schematic diagram in the prior art, it can be seen that in the existing new energy vehicle input signal processing solutions, basically various signals are mixed together to design the schematic diagram, and the subsequent PCB board wiring is designed according to the schematic diagram, which is likely to cause chaotic PCB board wiring. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a signal processing system to solve the problem of chaotic PCB board wiring. The specific technical solutions are as follows:

[0004] In a first aspect, a signal processing system is provided. The system includes:

[0005] Multiple sub-signal processing modules, the input end of each sub-signal processing module communicates with the output end of a vehicle sub-component, and is used to normalize the output signal of the vehicle sub-component. Among them, the output signals of different vehicle sub-components are different, and are voltage signals, current signals, and temperature signals respectively;

[0006] Multiple sub-interface modules, the input end of each sub-interface module communicates with the output end of a sub-signal processing module, and is used to send the output signal of the sub-signal processing module to a sub-partition of the DSP chip. Among them, each sub-interface module corresponds to a sub-partition of the DSP chip.

[0007] As an optional embodiment, the sub-signal processing module includes:

[0008] A differential circuit unit, used to convert the differential signal into a signal within a preset voltage range when the output signal of the vehicle sub-component is a differential signal;

[0009] A voltage dividing circuit unit, used to convert the single-ended signal into a signal within a preset voltage range when the output signal of the vehicle sub-component is a single-ended signal.

[0010] As an optional embodiment, the differential circuit unit includes:

[0011] A differential - to - single - ended circuit, which is used to convert a differential signal into a variable - gain single - ended signal;

[0012] A low - voltage follower, which is connected to the output end of the differential - to - single - ended circuit and is used to perform impedance transformation on the single - ended signal, isolating the front - stage differential - to - single - ended circuit and the rear - stage voltage - dividing circuit;

[0013] A voltage - dividing circuit, which is connected to the output end of the low - voltage follower and is used to convert the converted single - ended signal into a signal within a preset voltage range.

[0014] As an optional embodiment, the differential - to - single - ended circuit includes:

[0015] Resistor R10, resistor R11, resistor R12, resistor R13, resistor R14, and comparator OP1,

[0016] One end of resistor R12 is connected to one end of resistor R10 and the negative - terminal input interface. The other end of resistor R12 is connected to the first input terminal of the low - voltage follower through resistor R14, and the other end of resistor R12 is also connected to the first input terminal of comparator OP1;

[0017] One end of resistor R11 is connected to the other end of resistor R10 and the positive - terminal input interface. The other end of resistor R11 is grounded through resistor R13, and the other end of resistor R12 is also connected to the second input terminal of comparator OP1;

[0018] When the differential signal is a differential voltage signal or a current signal, if the front - stage circuit of the differential - to - single - ended circuit is a differential circuit, then resistor R10 is retained; if the front - stage circuit of the differential - to - single - ended circuit is not a differential circuit, then resistor R10 is deleted.

[0019] As an optional embodiment, the voltage - dividing circuit includes:

[0020] Resistor R15, resistor R16, resistor R17, and resistor R18,

[0021] One end of resistor R15 is connected to the power - supply signal. The other end of resistor R15 is grounded through resistor R16 and connected to the output end of the voltage - dividing circuit through resistor R17. The other end of resistor R15 is also connected to the second input terminal and the output end of the low - voltage follower;

[0022] One end of resistor R18 is connected to the output end of the voltage - dividing circuit, and the other end of resistor R18 is grounded;

[0023] If voltage pull - up is required, then resistor R16 is deleted; if voltage pull - down is required, then resistor R15 is deleted.

[0024] As an optional embodiment, the voltage dividing circuit unit includes:

[0025] Resistor R21, resistor R22, resistor R23 and resistor R24,

[0026] One end of the resistor R21 is connected to a power signal, and the other end of the resistor R21 is respectively grounded through the resistor R22 and connected to the output end of the voltage dividing circuit unit through the resistor R23;

[0027] One end of the resistor R24 is connected to the output end of the voltage dividing circuit unit, and the other end of the resistor R24 is grounded;

[0028] If the single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is greater than a preset voltage threshold, then the resistor R21 and the resistor R22 are deleted;

[0029] If the single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is not greater than a preset voltage threshold, or the single-ended signal is a temperature signal, then the resistor R22 and the resistor R24 are deleted, and the resistor R23 is configured to be zero.

[0030] As an optional embodiment, the single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is not greater than a preset voltage threshold, or the single-ended signal is a temperature signal,

[0031] If filtering is to be performed, the resistor R24 is configured as a capacitor, and the capacitor and the resistor R23 form a first-order low-pass filter.

[0032] The present application also provides a new energy electric vehicle, including the signal processing system described in any one of the above.

[0033] Advantageous effects of the embodiments of the present application:

[0034] The embodiments of the present application provide a signal processing system. In the huge data acquisition system of the whole vehicle, by establishing an input signal acquisition method divided by signal type and stipulating the input modes of different types of input signals, the signal flow of the whole vehicle becomes clearer, which facilitates engineers to enhance the clarity of the design schematic diagram and the logic of the later PCB board wiring.

[0035] Of course, implementing any product or method of the present application does not necessarily require achieving all the above advantages at the same time. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a signal processing schematic diagram in the prior art;

[0038] Figure 2 It is a schematic diagram of the signal processing system provided by the embodiment of the present application;

[0039] Figure 3 It is a circuit schematic diagram of the sub-signal processing module provided by the embodiment of the present application;

[0040] Figure 4 It is a schematic diagram of the sub-interface module provided by the embodiment of the present application;

[0041] Figure 5 It is a structural schematic diagram of the DSP chip provided by the embodiment of the present application. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0043] In the subsequent description, suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of the description of the present application, and they have no specific meaning in themselves. Therefore, "module" and "component" can be used interchangeably.

[0044] To solve the problems mentioned in the background art, according to one aspect of the embodiments of the present application, a signal processing system is provided. Figure 2Schematic diagram of the signal processing system provided by the embodiment of the present application. The system includes: a vehicle and a controller device. The controller device includes multiple sub-signal processing modules, multiple sub-interface modules, and a DSP (Digital Signal Processing) chip. The input end of each sub-signal processing module communicates with the output end of a vehicle component. The output signals of different vehicle components are different, namely voltage signals, current signals, and temperature signals. The sub-signal processing module is used to normalize the output signals of the vehicle components, processing high voltage or low voltage to voltages within the same range, such as 0 to 3.3V.

[0045] As Figure 2 shown, the output end of vehicle component 2 is connected to the input end of sub-signal processing module 2, and the output end of vehicle component 1 is connected to the input end of sub-signal processing module 1. In this way, signals are distinguished according to signal types, and modular design is carried out in the signal processing system of new energy electric vehicles, standardizing the input signal processing process, thereby simplifying the hardware design and subsequent PCB layout wiring, etc.

[0046] The input end of each sub-interface module communicates with the output end of a sub-signal processing module, and is used to provide an interface, so as to transfer the output signal of the sub-signal processing module to a sub-partition of the DSP chip. According to the different voltages configured by the IO port or AN port of the DSP chip, it can be realized through the four-resistor network of the sub-signal processing module and the VCC_DSP configuration of the sub-interface module.

[0047] Among them, each sub-interface module corresponds to a sub-partition of the DSP chip. As Figure 2 shown, sub-interface 2 transfers the signal to sub-partition 2, and sub-interface 1 transfers the signal to sub-partition 1.

[0048] In the present application, in the huge data acquisition system of the vehicle, by establishing an input signal acquisition method that partitions according to signal types and stipulating the input modes of different types of input signals, the signal flow of the vehicle becomes clearer, improving the clarity and logic of the PCB board wiring.

[0049] In addition, the present application isolates the signals sent by different vehicle components. It only needs to configure different isolation power supplies for their respective sampling circuits and MUX chips. Each module is independent of each other and isolated from the DSP chip, which can greatly reduce the problem of signal crosstalk between body modules and improve the stability and anti-interference ability of the input signal processing system.

[0050] Optionally, depending on the type of the input signal, the specific conversion circuit will also be different, which itself increases the difficulty of the hardware design and thus affects the efficiency of the hardware engineer in designing the schematic diagram. Therefore, this application is as compatible as possible with the vast majority of input signal processing situations, and the input signals are mainly divided into two categories, differential signals and single-ended signals. Thus, the sub-signal processing module includes a differential circuit unit and a voltage-dividing circuit unit.

[0051] Figure 3 FIG. is a schematic circuit diagram of the sub-signal processing module.

[0052] When the output signal of the whole vehicle sub-component is a differential signal, the signal processing solution is the processing solution of V1+ and V1- attached Figure 3 to. The differential circuit unit is used for processing. OP1 and R11, R12, R13, R14 form a variable-gain differential-to-single-ended circuit. OP2 forms a voltage follower to achieve the function of impedance transformation, so that the subsequent voltage-dividing circuit and the previous differential-to-single-ended circuit do not affect each other. R15, R16, R17, R18 form a four-resistor voltage-dividing circuit to convert the signal input to the sub-interface module into a signal within a preset voltage range.

[0053] When the output signal of the whole vehicle sub-component is a single-ended signal, the signal processing solution is the processing solution of V2 attached Figure 3 to. The voltage-dividing circuit unit is used for processing to convert the single-ended signal into a signal within a preset voltage range.

[0054] Optionally, the differential circuit unit includes: a differential-to-single-ended circuit, a low-voltage follower, and a voltage-dividing circuit. The differential-to-single-ended circuit is used to convert the differential signal into a variable-gain single-ended signal; the low-voltage follower is connected to the output end of the differential-to-single-ended circuit and is used to perform impedance transformation on the single-ended signal to isolate the previous differential-to-single-ended circuit and the subsequent voltage-dividing circuit; the voltage-dividing circuit is connected to the output end of the low-voltage follower and is used to convert the converted single-ended signal into a signal within a preset voltage range.

[0055] Specifically, the differential-to-single-ended circuit in the differential circuit unit includes: resistor R10, resistor R11, resistor R12, resistor R13, resistor R14, and comparator OP1. One end of resistor R12 is connected to one end of resistor R10 and the negative input interface. The other end of resistor R12 is connected to the first input end of the low-voltage follower through resistor R14, and the other end of resistor R12 is also connected to the first input end of comparator OP1; one end of resistor R11 is connected to the other end of resistor R10 and the positive input interface. The other end of resistor R11 is grounded through resistor R13, and the other end of resistor R12 is also connected to the second input end of comparator OP1.

[0056] The differential - to - single - ended circuit is not fixed, and the specific components inside need to be determined according to whether there is a differential circuit in the front stage. The differential signal is generally a differential voltage signal or a current signal. If the front - stage circuit of the differential - to - single - ended circuit is a differential circuit, the resistor R10 is retained; if the front - stage circuit of the differential - to - single - ended circuit is not a differential circuit, the resistor R10 is deleted.

[0057] Specifically, the voltage - dividing circuit in the differential - circuit unit includes: resistor R15, resistor R16, resistor R17, and resistor R18. One end of resistor R15 is connected to the power - supply signal, and the other end of resistor R15 is respectively grounded through resistor R16 and connected to the output end of the voltage - dividing circuit through resistor R17. The other end of resistor R15 is also connected to the second input end and the output end of the low - voltage follower; one end of resistor R18 is connected to the output end of the voltage - dividing circuit, and the other end of resistor R18 is grounded;

[0058] The voltage - dividing circuit is not fixed, and the specific components inside need to be determined according to voltage pull - up or pull - down. If voltage pull - up is required, resistor R16 is deleted, resistor R15 is retained, and voltage pull - up is performed through VCC_ZC; if voltage pull - down is required, resistor R15 is deleted, resistor R16 is retained, and voltage pull - down is performed through GND1.

[0059] Optionally, the voltage - dividing circuit unit includes: resistor R21, resistor R22, resistor R23, and resistor R24. One end of resistor R21 is connected to the power - supply signal, and the other end of resistor R21 is respectively grounded through resistor R22 and connected to the output end of the voltage - dividing circuit unit through resistor R23; one end of resistor R24 is connected to the output end of the voltage - dividing circuit unit, and the other end of resistor R24 is grounded.

[0060] When the output signal of the whole - vehicle sub - component is a single - ended signal, the signal - processing scheme is the processing scheme of the attached Figure 3 V2, and a voltage - dividing circuit unit is used for processing. The single - ended signal is divided into two types:

[0061] The first type of single - ended signal: If the single - ended signal is a single - ended voltage signal and the voltage value of the single - ended voltage signal is greater than the preset voltage threshold, that is, when processing a single - ended analog voltage signal and a single - ended switch - quantity high - effective voltage signal, resistor R21 and resistor R22 are deleted, and the single - ended signal is divided by R23 and R24.

[0062] The second type of single - ended signal: If the single - ended signal is a single - ended voltage signal and the voltage value of the single - ended voltage signal is not greater than the preset voltage threshold, or the single - ended signal is a temperature signal, that is, when processing a single - ended switch - quantity low - effective voltage signal and a temperature signal, resistor R22 and resistor R24 are deleted, and resistor R23 is configured to be zero.

[0063] Optionally, if filtering is to be performed, the resistor R24 is configured as a capacitor, and the capacitor and the resistor R23 form a first-order low-pass filter.

[0064] Figure 4 It is a schematic diagram of the sub-interface module. Figure 5 It is a schematic diagram of the structure of the DSP chip.

[0065] The present application also provides a new energy electric vehicle, including the signal processing system of any one of the above.

[0066] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A signal processing system, characterized in that, The system includes: Multiple sub-signal processing modules, the input end of each sub-signal processing module communicates with the output end of a vehicle component, and is used to normalize the output signal of the vehicle component. Among them, the output signals of different vehicle components are different, which are voltage signals, current signals and temperature signals respectively; Multiple sub-interface modules, the input end of each sub-interface module communicates with the output end of a sub-signal processing module, and is used to send the output signal of the sub-signal processing module to a sub-partition of the DSP chip. Among them, each sub-interface module corresponds to a sub-partition of the DSP chip; The sub-signal processing module includes: A differential circuit unit, which is used to convert the differential signal into a signal within a preset voltage range when the output signal of the vehicle component is a differential signal; A voltage dividing circuit unit, which is used to convert the single-ended signal into a signal within a preset voltage range when the output signal of the vehicle component is a single-ended signal.

2. The signal processing system according to claim 1, characterized in that, The differential circuit unit includes: A differential-to-single-ended circuit, which is used to convert a differential signal into a single-ended signal with variable gain; A low-voltage follower, connected to the output end of the differential-to-single-ended circuit, which is used to perform impedance transformation on the single-ended signal and isolate the front-stage differential-to-single-ended circuit and the rear-stage voltage dividing circuit; A voltage dividing circuit, connected to the output end of the low-voltage follower, which is used to convert the converted single-ended signal into a signal within a preset voltage range.

3. The signal processing system according to claim 2, characterized in that, The differential-to-single-ended circuit includes: Resistor R10, resistor R11, resistor R12, resistor R13, resistor R14 and comparator OP1, One end of resistor R12 is connected to one end of resistor R10 and the negative input interface, the other end of resistor R12 is connected to the first input end of the low-voltage follower through resistor R14, and the other end of resistor R12 is also connected to the first input end of comparator OP1; One end of resistor R11 is connected to the other end of resistor R10 and the positive input interface, the other end of resistor R11 is grounded through resistor R13, and the other end of resistor R12 is also connected to the second input end of comparator OP1; When the differential signal is a differential voltage signal or a current signal, if the pre-stage circuit of the differential-to-single-ended circuit is a differential circuit, then resistor R10 is retained; if the pre-stage circuit of the differential-to-single-ended circuit is not a differential circuit, then resistor R10 is deleted.

4. The signal processing system according to claim 2, characterized in that, The voltage dividing circuit includes: Resistor R15, resistor R16, resistor R17 and resistor R18, One end of resistor R15 is connected to the power supply signal, the other end of resistor R15 is grounded through resistor R16 and connected to the output end of the voltage dividing circuit through resistor R17 respectively. The other end of resistor R15 is also connected to the second input end and the output end of the low-voltage follower; One end of resistor R18 is connected to the output end of the voltage dividing circuit, and the other end of resistor R18 is grounded; If voltage pull-up is required, then resistor R16 is deleted; if voltage pull-down is required, then resistor R15 is deleted.

5. The signal processing system according to claim 1, characterized in that, The voltage dividing circuit unit includes: Resistors R21, R22, R23, and R24 One end of the resistor R21 is connected to a power signal, and the other end of the resistor R21 is grounded through the resistor R22 and connected to the output end of the voltage division circuit unit through the resistor R23 respectively; One end of the resistor R24 is connected to the output end of the voltage division circuit unit, and the other end of the resistor R24 is grounded; If the single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is greater than a preset voltage threshold, then the resistor R21 and the resistor R22 are deleted; If the single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is not greater than a preset voltage threshold, or the single-ended signal is a temperature signal, then the resistor R22 and the resistor R24 are deleted, and the resistor R23 is configured to be zero.

6. The signal processing system according to claim 5, characterized in that, The single-ended signal is a single-ended voltage signal and the voltage value of the single-ended voltage signal is not greater than a preset voltage threshold, or the single-ended signal is a temperature signal If filtering is to be performed, the resistor R24 is configured as a capacitor, and the capacitor and the resistor R23 form a first-order low-pass filter.

7. A new energy electric vehicle, comprising the signal processing system according to any one of claims 1 - 6.

Images