Signal processing device for electric vehicle and electric vehicle

Abstract

The application provides a signal processing device for an electric vehicle and the electric vehicle. The electric vehicle comprises a motor, a motor controller for controlling the motor, and an anti-lock device. The motor carries a detection sensor for detecting rotation information of the motor, and the detection sensor outputs a signal containing the rotation information to the motor controller. The signal processing device comprises a signal processor connected with the detection sensor and the anti-lock device respectively, and processes the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device. The device can use the signal related to the rotation of the motor output by the detection sensor carried by the motor for anti-lock control, thereby omitting the wheel speed sensor and its related process, reducing the cost, and reducing the complexity of installation and maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and in particular to a signal processing device for an electric vehicle and the electric vehicle. BACKGROUND

[0002] The existing electric vehicles (including electric-assisted bicycles, electric bicycles and electric motorcycles, etc.) usually provide power to the wheels by electric motors to make the wheels rotate to realize the walking or assisting of the electric vehicles. If the electric vehicle is equipped with an ABS device (anti-lock braking system), a sensing element needs to be additionally installed to detect and collect the wheel speed to realize the ABS function.

[0003] In order to work reliably, the existing sensing element usually needs to be additionally equipped with a bracket on the electric vehicle to install the sensing element, and a code disc also needs to be fixed on the wheel to rotate with the wheel. The probe of the sensing element detects the rotation of the code disc to realize the detection of the wheel speed, and then sends the wheel speed signal to the ABS device, so that the ABS device can reliably perform anti-lock adjustment. Because the sensing element needs to be additionally installed on the wheel, and the code disc needs to be fixed on the wheel, too many parts are arranged on the wheel, the space is cramped, and the processing and installation are very inconvenient, and the cost is high. SUMMARY

[0004] Therefore, the embodiments of the present application provide a signal processing device for an electric vehicle and the electric vehicle to at least partially solve the above problems.

[0005] According to an aspect of the present application, a signal processing device for an electric vehicle is provided, the electric vehicle comprising an electric motor, an electric motor controller for controlling the electric motor, and an anti-lock device, the electric motor carrying a detection sensor for detecting rotation information of the electric motor, the detection sensor outputting a signal containing the rotation information to the electric motor controller; the signal processing device comprising a signal processor, the signal processor being connected with the detection sensor and the anti-lock device respectively, and processing the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device.

[0006] Optionally, the signal processor comprises a signal conversion circuit, the signal conversion circuit being connected with the detection sensor and converting the multi-phase voltage signal output by the detection sensor into a single-phase voltage signal.

[0007] Optionally, the signal conversion circuit is configured to make the output signal jump when a jump is detected in any phase of the multi-phase voltage signal.

[0008] Optionally, the detection sensor comprises a first phase output port, a second phase output port and a third phase output port; the signal conversion circuit comprises a first exclusive-OR chip and a second exclusive-OR chip, the first exclusive-OR chip comprises a first input end, a second input end and a first output end, the second exclusive-OR chip comprises a third input end, a fourth input end and a second output end, the first input end is used to be connected with the first phase output port, the second input end is used to be connected with the second phase output port, the first output end is connected with the third input end, and the fourth input end is used to be connected with the third phase output port, so as to convert the three-phase voltage signal output by the detection sensor into a single-phase voltage signal; or, the signal conversion circuit comprises at least a first transistor circuit unit and a second transistor circuit unit, the first transistor circuit unit is used to perform a first exclusive-OR operation on the voltage signals output by the first phase output port and the second phase output port, the second transistor circuit unit is used to perform a second exclusive-OR operation on the result of the first exclusive-OR operation and the voltage signal output by the third phase output port, and output a single-phase voltage signal.

[0009] Optionally, the signal processor comprises an analog wheel speed sensor circuit, which is used to be connected with the detection sensor and convert the voltage signal output by the detection sensor into a current signal available for the anti-lock device.

[0010] Optionally, the analog wheel speed sensor circuit is connected with the signal conversion circuit and converts the input voltage signal into a current signal available for the anti-lock device.

[0011] Optionally, the analog wheel speed sensor circuit comprises a first current limiting circuit, a second current limiting circuit and a switch circuit; the first current limiting circuit is used to be connected with the anti-lock device to output a first current value to the anti-lock device; the second current limiting circuit is connected with the anti-lock device through the switch circuit, the switch circuit is used to receive a single-phase voltage signal and be closed or opened under the control of the single-phase voltage signal, so as to connect or disconnect the second current limiting circuit with the anti-lock device, and the single-phase voltage signal is the signal output by the detection sensor or the signal output by the signal conversion circuit.

[0012] Optionally, the signal processing device further comprises a first signal transmission branch, a second signal transmission branch and a third signal transmission branch, the first signal transmission branch is used to be connected between the detection sensor and the motor controller to transmit the signal output by the detection sensor to the motor controller, the second signal transmission branch is used to connect the signal processor with the first signal transmission branch, and the third signal transmission branch is used to connect the signal processor with the anti-lock device.

[0013] Optionally, the signal processing device further comprises a cable, the signal processor is integrally packaged with the cable, the cable comprises a first cable segment and a second cable segment, the first cable segment is used for connecting the detection sensor and the signal processor, the second cable segment comprises a first sub-cable segment and a second sub-cable segment, the first sub-cable segment is used for connecting the signal processor and the motor controller, and the second sub-cable segment is used for connecting the signal processor and the anti-lock device; or, the signal processing device comprises a third cable segment and a fourth cable segment, the third cable segment is used for connecting the detection sensor and the motor controller, the signal processor is packaged in the second cable segment, and a first end of the fourth cable segment is used for connecting the detection sensor, and the fourth cable segment is used for connecting the anti-lock device.

[0014] According to another aspect of the present application, an electric vehicle is provided, the electric vehicle comprises a wheel and a motor, the motor carries a detection sensor for detecting rotation information of the motor, the electric vehicle further comprises a motor controller for controlling the motor, a braking system connected with the wheel, an anti-lock device connected with the braking system, and the signal processing device as described above, the signal processing device is connected with the motor controller, the detection sensor and the anti-lock device respectively, and transmits the signal output by the detection sensor to the motor controller, and processes the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device, so as to transmit the anti-lock control signal to the anti-lock device.

[0015] In the detection system provided in the embodiments of the present application, the anti-lock device can be directly or indirectly connected with the detection sensor originally carried by the motor (such as a Hall sensor built in the motor or an optical encoder installed on the motor), so as to control the anti-lock of the electric vehicle based on the signal output by the original detection sensor of the motor, thereby realizing the normal working of the anti-lock function of the anti-lock device without additional cooperation of the sensing element for detecting the wheel speed and the related accessories, so as to reduce the production cost and the structural complexity, and improve the reliability. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the following description of exemplary embodiments in conjunction with the drawings, more details, features and advantages of the present application are disclosed, in which:

[0017] Figure 1A An installation diagram of an anti-lock device for an existing electric vehicle.

[0018] Figure 1B An installation diagram of an anti-lock device for an existing electric vehicle.

[0019] Figure 2 An installation diagram of an anti-lock device for an existing electric vehicle.

[0020] Figure 3AFig. 1 is a schematic diagram of a first embodiment of the application showing the connection of the anti-lock device to the detection sensor.

[0021] Figure 3B Fig. 2 is a schematic diagram of a first embodiment of the application showing the conversion of a multi-phase signal to a single-phase signal.

[0022] Figure 3C Fig. 3 is a schematic diagram of a second embodiment of the application showing the conversion of a multi-phase signal to a single-phase signal.

[0023] Figure 3D Fig. 4 is a schematic diagram of a first embodiment of the signal conversion circuit of the application.

[0024] Figure 3E Fig. 5 is a schematic diagram of a second embodiment of the signal conversion circuit of the application.

[0025] Figure 4A Fig. 6 is a schematic diagram of a second embodiment of the connection of the anti-lock device to the detection sensor of the application.

[0026] Figure 4B Fig. 7 is a schematic diagram of a third embodiment of the connection of the anti-lock device to the detection sensor of the application.

[0027] Figure 4C Fig. 8 is a schematic diagram of the structure of a first embodiment of the analog wheel speed sensor circuit of the application.

[0028] Figure 4D Fig. 9 is a schematic diagram of the structure of a second embodiment of the analog wheel speed sensor circuit of the application.

[0029] Figure 5A Fig. 10 is a schematic diagram of the connection of the anti-lock device to the detection sensor of a second embodiment of the signal processing device of the application.

[0030] Figure 5B Fig. 11 is a schematic diagram of the connection of the anti-lock device to the detection sensor of a third embodiment of the signal processing device of the application.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 11, drive motor; 12, wheel speed sensor; 13, code disc; 14, wheel; 15, motor controller; 16, anti-lock device; 161, current conversion branch; 162, input branch; 163, operational amplifier circuit; 17, Hall sensor; 20, signal processor; 21, analog wheel speed sensor circuit; 211, first current limiting circuit; 212, second current limiting circuit; 213, switching circuit; 22, signal conversion circuit; 221, first transistor circuit unit; 222, second transistor circuit unit; 223, NOT gate. DETAILED DESCRIPTION

[0033] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0034] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0035] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0036] It should be noted that the terms "one" and "multiple" used in this application are illustrative rather than restrictive. Those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be interpreted as "one or more". The names of messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0037] like Figure 1A As shown, the electric vehicle includes wheels 14, motor 11, Hall sensor 17, motor controller 15, anti-lock braking device 16, sensing element 12, and encoder 13, etc.

[0038] The motor 11 is connected with the wheel 14, which can be a wheel hub motor, to drive the wheel 14 to rotate. The motor 11 is provided with a detection sensor (e.g. a Hall sensor 17) to detect the rotating information (e.g. the rotating position) of the motor 11 and output a corresponding signal. The Hall sensor 17 can include one, two, three or more than three detectors to output one or multiple phase signals. The motor controller 15 is connected with the Hall sensor 17 and receives the signal output by the Hall sensor 17. For example, the motor controller 15 determines the rotating position and angle of the motor 11 according to the received signal, determines the direction of the control force output to the motor 11 to accelerate or decelerate the motor 11, and only when the motor controller 15 receives the rotating position of the motor 11 output by the Hall sensor 17, the motor 11 can be reliably controlled.

[0039] To detect the wheel speed, a code disc 13 and a wheel speed detection element (e.g. a sensing element 12) are usually arranged on the wheel. The rotation of the motor 11 drives the wheel 14 to rotate, and the code disc 13 is fixed on the wheel 14 and rotates with the wheel 14. The code disc 13 is provided with a plurality of uniformly distributed holes, and the sensing element 12 is installed corresponding to the code disc 13 to detect the rotation of the code disc 13 to obtain the rotating speed of the wheel 14 and output a signal to the anti-lock device 16. The anti-lock device 16 determines the rotating speed of the wheel 14 according to the signal output by the sensing element 12 to determine whether the wheel 14 is about to be locked, and controls the braking system to reduce the output friction to prevent the wheel 14 from being locked and causing the electric vehicle to slip when the wheel 14 is about to be locked.

[0040] Based on the above description of the working process of the electric vehicle, it can be known that the motor control and anti-lock control of the existing electric vehicle are two independent devices. In the existing electric vehicle, the Hall sensor 17 of the motor is connected with the motor controller 15, and the sensing element 12 is connected with the anti-lock device 16. However, in order to install the sensing element 12 and ensure that the sensing element 12 can work reliably, it is necessary to install the code disc 13 and possibly configure a separate bracket for the sensing element 12, which leads to the problems of complex structure, poor reliability and high cost of the electric vehicle.

[0041] To solve the above problems, the application provides a signal processing device for an electric vehicle, the electric vehicle including a motor 11, a motor controller 15 for controlling the motor 11, and an anti-lock device 16. The motor 11 is provided with a detection sensor for detecting the rotating information of the motor 11, and the detection sensor outputs a signal containing the rotating information to the motor controller 15. The signal processing device includes a signal processor 20 connected with the detection sensor and the anti-lock device 16 respectively, and processes the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device 16.

[0042] AsFigure 1B As shown, the signal processor 20 can be connected between the anti-lock device 16 and the detection sensor, to convert the signal output by the detection sensor into a signal available for the anti-lock device 16, and transmit to the anti-lock device 16. In this way, the anti-lock device 16 can adjust the brake state of the electric vehicle (such as electric bicycle, electric motorcycle, electric assist vehicle, etc.) based on the available anti-lock control signal. For example, the anti-lock device 16 determines the wheel speed of the wheel based on the anti-lock control signal, and then determines the slip ratio according to the wheel speed and the vehicle speed of the electric vehicle, which is used to indicate whether the wheel is locked, and if the wheel is determined to be locked according to the slip ratio, the anti-lock device 16 can adjust the brake state of the electric vehicle, so as to prevent the wheel from being locked. By setting the signal processor 20, the anti-lock device 16 can reuse the signal output by the detection sensor (which is the signal provided to the motor controller 15 for the motor controller 15 to control the motor 11) for anti-lock control, thereby omitting the sensing element for detecting the wheel speed and related accessories, but without affecting the anti-lock function and motor control function of the electric vehicle, thereby reducing the cost, reducing the parts at the wheel 14, and improving the convenience of installation and maintenance.

[0043] For ease of understanding, the structure and working process of two different types of anti-lock devices 16 are described as follows:

[0044] As shown in Figure 2 One type of anti-lock device 16 uses a single-phase voltage signal as an available signal. The anti-lock device 16 includes an operational amplifier circuit 163, a voltage dividing branch and an input branch 162 connected to the operational amplifier circuit 163; the voltage dividing branch is connected to the operational amplifier circuit 163 to output a first voltage value to the operational amplifier circuit 163; the detection sensor is directly connected to the input branch 162 and inputs a single-phase voltage signal to the operational amplifier circuit 163, and the operational amplifier circuit 163 processes the single-phase voltage signal based on the input first voltage value and outputs the processed signal.

[0045] The voltage dividing branch is connected to the operational amplifier circuit 163 to output a first voltage value to the operational amplifier circuit 163. The detection sensor is directly connected to the input branch 162 and inputs a single-phase voltage signal to the operational amplifier circuit 163, and the operational amplifier circuit 163 processes the single-phase voltage signal based on the input first voltage value and outputs the processed signal.

[0046] For example, the voltage dividing branch includes a 3.3V power supply end, a series-connected resistor R1 and resistor R2, and a ground end.

[0047] The negative input terminal of the operational amplifier circuit 163 is connected between the resistor R1 and the resistor R2, so that the first voltage value of the negative input terminal of the operational amplifier circuit 163 is the same as the voltage value at the connection position on the voltage dividing branch. The positive input terminal of the operational amplifier circuit 163 is connected with the input branch 162, and the input terminal of the input branch 162 is used to input the voltage signal of the phase.

[0048] In this way, the operational amplifier circuit 163 compares the voltage value of the voltage signal of the phase with the first voltage value, and when the voltage value of the voltage signal of the phase is higher than the first voltage value, the output terminal of the operational amplifier circuit 163 outputs a high level; when the voltage value of the voltage signal of the phase is lower than the first voltage value, the output terminal of the operational amplifier circuit 163 outputs a low level; the high and low levels of the two signals are compared, and the rising and falling frequencies of the output terminal of the operational amplifier circuit 163 can be consistent with the frequency of the voltage signal of the phase, so that the MCU can calculate the wheel speed based on the frequency of the signal output by the operational amplifier circuit 163, thereby omitting the sensing element 12 and its related accessories, and the signal output by the detection sensor can be reused to realize the anti-lock function.

[0049] The other anti-lock device 16 uses the current signal of the phase as the available signal. The circuit structure of this anti-lock device 16 is slightly different from the structure of the aforementioned voltage type anti-lock device 16, in addition to including the operational amplifier circuit 163, the voltage dividing branch and the input branch 162 connected with the operational amplifier circuit 163, it also includes a current conversion branch 161. The voltage dividing branch is connected with the operational amplifier circuit 163 to output the first voltage value to the operational amplifier circuit 163. The current conversion branch 161 is connected on the input branch 162, and the detection sensor is connected with the input branch 162 through the analog wheel speed sensor circuit 21, the current conversion branch 161 converts the input current signal into a voltage signal and inputs it to the operational amplifier circuit 163, and the operational amplifier circuit 163 processes the voltage signal converted by the current conversion branch 161 based on the first voltage value and outputs the processed signal.

[0050] The same parts in the two anti-lock devices 16 (such as the operational amplifier circuit 163, the voltage dividing branch and the input branch 162, etc.) will not be described again, and the main part of the difference, the current conversion branch 161 (the part shown by the dashed line in the middle) Figure 2 , will be described.

[0051] The current conversion branch 161 is connected on the input branch 162, and the current conversion branch 161 converts the current signal output by the analog wheel speed sensor circuit 21 into a voltage signal and inputs it to the operational amplifier circuit 163.

[0052] From the above description, it can be seen that the types of signals available to different anti-lock devices 16 can be different, in addition, the number of phases of the signals output by the detection sensors can also be different, in order to adapt to different detection sensors and anti-lock devices 16, the structure of the signal processor 20 can also be different, the following describes several cases as follows:

[0053] In the first case, the detection sensor outputs a multi-phase voltage signal, and the available signal of the anti-lock device 16 is a single-phase voltage signal, at this time, the signal processor 20 includes a signal conversion circuit 22, which is connected with the detection sensor and converts the multi-phase voltage signal output by the detection sensor into a single-phase voltage signal.

[0054] Taking the detection sensor as a Hall sensor 17 as an example, in other implementations, the detection sensor can also be an optical encoder, etc., which is not limited. The multi-phase voltage signal output by the Hall sensor 17 has higher accuracy in detecting the position and angle of the motor 11 than a single phase. For example, the motor 11 internally includes 26 pairs of magnetic poles, then the detection accuracy of the signal output by a single-phase Hall sensor for the rotation of the motor 11 is 360° / 26, and the accuracy of the three-phase signal is 360° / (26*3), it can be seen that the detection accuracy is greatly increased, and thus the accuracy of the wheel speed determined based on the multi-phase voltage signal is higher, and the accuracy of the anti-lock control is also higher.

[0055] Therefore, the multi-phase voltage signal output by the detection sensor is converted by the signal conversion circuit 22 without losing information to convert it into a single-phase voltage signal so that the anti-lock device 16 can use the signal.

[0056] Figure 3A A schematic diagram of an anti-lock device connected with a detection sensor through a signal conversion circuit 22 is shown. The signal conversion circuit 22 is used to make the output signal jump when any one phase of the multi-phase voltage signal is detected to jump. In this way, the multi-phase voltage signal can be converted into a single-phase voltage signal without losing information.

[0057] Figure 3B And Figure 3C respectively show Figure 3B A schematic diagram of converting a three-phase voltage signal output by a Hall sensor 17 with a phase difference of 120° into a single-phase voltage signal (i.e. output signal) is shown. Figure 3C A schematic diagram of converting a three-phase voltage signal output by a Hall sensor 17 with a phase difference of 60° into a single-phase voltage signal (i.e. output signal) is shown.

[0058] The following two different structures of the signal conversion circuit 22 are exemplified. As Figure 3DAs shown, the detection sensor includes a first phase output port, a second phase output port and a third phase output port. The signal conversion circuit 22 includes a first XOR chip U2 and a second XOR chip U3, the first XOR chip U2 includes a first input terminal (A port of U2), a second input terminal (B port of U2) and a first output terminal (Y1 port of U2), the second XOR chip U3 includes a third input terminal (Y1 port of U3), a fourth input terminal (C port of U3) and a second output terminal (Y2 port of U3), the first input terminal is used to be connected with the first phase output port, the second input terminal is used to be connected with the second phase output port, the first output terminal is connected with the third input terminal, and the fourth input terminal is used to be connected with the third phase output port, so as to convert the three-phase voltage signals output by the detection sensor into a single-phase voltage signal. Figure 3D Figure 3D Figure 3D Figure 3D Figure 3D Figure 3E

[0059] The first XOR chip U2 performs XOR processing on the A-phase signal and the B-phase signal, that is, when the A-phase signal and the B-phase signal are both high or low, the first output terminal Y1 of the first XOR chip U2 outputs low, and if one of the A-phase signal and the B-phase signal is high and the other is low, the first output terminal Y1 of the first XOR chip U2 outputs high.

[0060] The second XOR chip U3 performs XOR processing on the voltage signal output by the first output terminal Y1 and the C-phase signal, and the principle of XOR is the same, so it is not repeated here. In this way, when any one of the three-phase voltage signals appears voltage jump, the output voltage signal appears jump.

[0061] In this embodiment, the second output terminal of the second XOR chip U2 can be connected with a light-emitting diode to control its brightness, and the light-emitting diode has a matched photoelectric converter, which outputs a single-phase voltage signal by sensing the brightness of the light-emitting diode.

[0062] Another signal conversion circuit 22 includes at least a first transistor circuit unit 221 and a second transistor circuit unit 222, the first transistor circuit unit 221 is used to perform first XOR processing on the voltage signals output by the first phase output port and the second phase output port, the second transistor circuit unit 222 is used to perform second XOR processing on the result of the first XOR processing and the voltage signal output by the third phase output port, and output a single-phase voltage signal.

[0063] As Figure 4A ​​​​​​As shown, the first transistor circuit unit 221 includes transistors Q1 and Q2, resistors R2 and R1. The base of transistor Q1 is connected to phase A of Hall sensor 17 through resistor R1 to receive the phase A signal. The base of transistor Q2 is connected to phase B of Hall sensor 17 through resistor R2 to receive the phase B signal. The phase A signal and phase B signal are XORed, and the XOR result is input to the second transistor circuit unit 222.

[0064] The second transistor circuit unit 222 includes transistors Q5 and Q3 and resistor R3. The base of transistor Q5 is connected to the first transistor circuit unit 221. The base of transistor Q3 is connected to the C phase of Hall sensor 17 through resistor R3 to receive the C phase signal. The C phase signal and the result output by the first transistor circuit unit 221 are XORed. The XOR result can be directly output to the light-emitting diode to control the light-emitting diode to turn on and off.

[0065] Alternatively, the XOR result of the outputs of the first transistor circuit unit 221 and the second transistor circuit unit 222 can be input into the NOT gate circuit 223, and after being negated, it can be input into the light-emitting diode to control the light-emitting diode to turn on or off. The photoelectric converter detects the on or off state of the light-emitting diode to output the corresponding voltage signal for one phase.

[0066] When the type of signal output by the detection sensor is different from the type of signal available in the anti-lock braking system 16, the signal processor 20 includes an analog wheel speed sensor circuit 21, which is connected to the detection sensor and converts the voltage signal output by the detection sensor into a current signal available in the anti-lock braking system.

[0067] like Figure 4B As shown, if the output of the detection sensor is a voltage signal of one phase, the analog wheel speed sensor circuit 21 can be directly connected to the detection sensor to convert the voltage signal of one phase into a current signal for use by the anti-lock braking device 16.

[0068] For example, such as Figure 4C As shown, if the sensor outputs a multi-phase voltage signal, the analog wheel speed sensor circuit 21 is connected to the signal conversion circuit 22, converting the input voltage signal into a current signal usable by the anti-lock braking system (ABS). This allows the signal conversion circuit 22 to first convert the multi-phase voltage signal into a single-phase voltage signal, and then the analog wheel speed sensor circuit 21 to convert the single-phase voltage signal into a single-phase current signal. Since current signals have stronger anti-interference capabilities than voltage signals, their transmission performance is better.

[0069] In this embodiment, as Figure 4D and Figure 4CAs shown, the analog wheel speed sensor circuit 21 comprises a first current limiting circuit 211, a second current limiting circuit 212 and a switch circuit 213; the first current limiting circuit 211 is connected with the anti-lock device 16 to output a first current value to the anti-lock device 16; the second current limiting circuit 212 is connected with the anti-lock device 16 through the switch circuit 213, the switch circuit 213 is used to receive a voltage signal of a phase and to be closed or opened under the control of the voltage signal of the phase, so as to connect or disconnect the second current limiting circuit 212 with the anti-lock device 16, the voltage signal of the phase is the signal output by the detection sensor or the signal output by the signal conversion circuit 22.

[0070] In this way, the first current limiting circuit 211 is always connected with the anti-lock device 16 to output a first current value (for example, 7 mA) to the anti-lock device 16, when the voltage signal of the phase makes the light emitting diode emit light, the switch circuit 213 is closed, the second current limiting circuit 212 is connected with the anti-lock device 16 to output a second current value (for example, also 7 mA) to the anti-lock device 16, at this time, the current received by the anti-lock device 16 is the sum of the first current value and the second current value (for example, 14 mA).

[0071] When the voltage signal of the phase makes the light emitting diode extinguish, the switch circuit 213 is opened, the second current limiting circuit 212 is disconnected with the anti-lock device 16, at this time, the current received by the anti-lock device 16 is the first current value. In this way, the frequency of the jump of the current signal of the phase received by the anti-lock device 16 is consistent with the frequency of the jump of the voltage signal of the phase output by the detection sensor, so that the voltage signal is converted into the current signal without affecting the accuracy of the wheel speed.

[0072] Figure 4C A structure diagram of an analog wheel speed sensor circuit 21 is shown. As shown, Figure 4D The plug-in part H4 is used to be connected with the anti-lock device 16. The switch circuit 213 comprises a resistor R18, a resistor R19, a triode Q7 and a photoelectric converter, the voltage signal of the phase is input to the light emitting diode to make it emit light or extinguish according to the frequency of the voltage signal of the phase. The photoelectric converter detects the light emitting diode to output the corresponding electric signal, since the electric signal has the same frequency as the voltage signal of the phase, it is still called the voltage signal of the phase. The voltage signal of the phase is input to the triode Q7 to control it to be closed or opened.

[0073] The first current limiting circuit 211 comprises a resistor R27, the voltage of 12 V is applied to the resistor R27 to make it output the current of the first current value to the anti-lock controller. The second current limiting circuit comprises a resistor R21, one end of the resistor R21 is connected with the triode Q7, the other end is connected with the anti-lock controller, so as to be connected or disconnected with the anti-lock controller under the control of the switch circuit 213.

[0074] Figure 4C The principle of the analog wheel speed sensor circuit 21 shown is the same as that of the analog wheel speed sensor circuit 21 shown in Fig. 1, and the difference is that the first current limiting circuit 211 and the second current limiting circuit 212 are implemented by constant current source circuits, so that the current is more stable and the anti-interference ability is stronger, and therefore the working process is not described again. Figure 1B The principle of the analog wheel speed sensor circuit 21 shown is the same as that of the analog wheel speed sensor circuit 21 shown in Fig. 1, and the difference is that the first current limiting circuit 211 and the second current limiting circuit 212 are implemented by constant current source circuits, so that the current is more stable and the anti-interference ability is stronger, and therefore the working process is not described again.

[0075] In the embodiment, the signal processing device further comprises a first signal transmission branch 31, a second signal transmission branch 32 and a third signal transmission branch, the first signal transmission branch 31 is used to be connected between the detection sensor and the motor controller 15 to transmit the signal output by the detection sensor to the motor controller 15, the second signal transmission branch 32 is used to connect the signal processor 20 and the first signal transmission branch 31, and the third signal transmission branch is used to connect the signal processor 20 and the anti-lock device 16.

[0076] In this way, the first signal transmission branch 31 can realize the connection of the detection sensor and the motor controller 15, so as to ensure that the signal output by the detection sensor can be normally transmitted to the motor controller 15, and the motor controller 15 can control the motor 11 according to the signal. In addition, the second signal transmission branch 32 is connected to the first signal transmission branch 31 to read out one phase or multiple phases of signals from the first signal transmission branch 31 and transmit them to the signal processor 20, so that the signal processor 20 can process the signals and transmit them to the anti-lock device 16 through the third signal transmission branch, so that the anti-lock device 16 can reuse the signals output by the detection sensor to perform anti-lock control.

[0077] Preferably, the signal processing device further comprises a cable, the signal processor 20 is integrally packaged with the cable, and the cable comprises a first cable segment and a second cable segment, the first cable segment is used to connect the detection sensor and the signal processor 20, and the second cable segment comprises a first sub-cable segment and a second sub-cable segment, the first sub-cable segment is used to connect the signal processor 20 and the motor controller 15, and the second sub-cable segment is used to connect the signal processor 20 and the anti-lock device 16.

[0078] By packaging the cable and the signal processor 20 together, on one hand, the signal processor 20 can be protected, on the other hand, it is convenient to install it on the electric vehicle, and in this way, the modification of the existing electric vehicle can be facilitated, for example, for the existing electric vehicle, as long as the wheel speed sensor and its related accessories are removed and replaced with a cable packaged with a signal processor 20, the anti-lock function and motor control function of the electric vehicle can be used normally, the optimization cost of the modification is very low, and the function is completed and the reliability is high. In this example, the cable includes a first cable segment and a second cable segment, the first cable segment connects the detection sensor and the signal processor 20, so that the signal output by the detection sensor can be transmitted to the signal processor 20, and the first sub-cable segment of the second cable segment connects the signal processor 20 and the motor controller 15, so that the output signal can be transmitted to the motor controller 15 through the first sub-cable segment, so that the motor controller 15 receives the signal output by the detection sensor (the signal transmitted to the motor controller 15 can be directly transmitted to the motor controller 15 without being processed by the signal processor 20), and controls the motor 11 accordingly. The second sub-cable segment connects the signal processor 20 and the anti-lock device 16 to transmit the signal processed by the signal processor 20 to the anti-lock device 16.

[0079] Among them, the first signal transmission branch 31 can be a branch from the detection sensor to the motor controller 15, and the second signal transmission branch and the third signal transmission branch can be branches from the detection sensor to the anti-lock device. The two different branches can share part of the cable.

[0080] Alternatively, in another way, the signal processing device includes a third cable segment and a fourth cable segment, the third cable segment is used to connect the detection sensor and the motor controller 15, the signal processor 20 is packaged in the second cable segment, and the first end of the fourth cable segment is used to connect the detection sensor, and the fourth cable segment is used to connect the anti-lock device 16. In this way, the electric vehicle can be simply modified to ensure that the original function is not lost without changing the structure of the ABS, the motor and the motor controller, reducing the complexity of the structure. In this way, the first signal transmission branch 31 is a branch from the detection sensor to the motor controller 15 (for example, the branch formed by the third cable segment), and the second signal transmission branch and the third signal transmission branch are branches from the detection sensor to the anti-lock device (for example, the branch formed by the fourth cable segment and the signal processor 20).

[0081] In this way, the signal processor 20 can be protected to improve reliability, and the overall structure can be more compact and simple. For example, Figure 5AA schematic diagram of the integrated signal processor 20 is shown. In use, the signal processor 20 is connected to the plug H6 of the detection sensor through the plug H1, connected to the plug H3 of the motor controller 15 through the plug H2, and connected to the plug H5 of the anti-lock device 16 through the plug H4, so that the signal processor 20 can be easily mounted and dismounted.

[0082] The signal processor 20 can be integrated into the anti-lock device 16 (as shown in Figure 5B ), or integrated into the motor controller 15 (as shown in ​ ), without limitation.

[0083] According to another aspect of the present application, an electric vehicle is provided, the electric vehicle comprising a wheel 14 and a motor 11, the motor 11 carrying a detection sensor for detecting rotation information of the motor 11, the electric vehicle further comprising a motor controller 15 for controlling the motor 11, a braking system connected to the wheel 14, an anti-lock device 16 connected to the braking system, and the signal processing device as described above, the signal processing device being connected to the motor controller 15, the detection sensor and the anti-lock device 16 respectively, and transmitting the signal output by the detection sensor to the motor controller 15, and processing the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device 16, and transmitting the anti-lock control signal to the anti-lock device 16.

[0084] The anti-lock control device of the electric vehicle does not need a separate sensing element to detect the wheel speed of the wheel, only needs the anti-lock device 16 to be directly or indirectly connected to the detection sensor arranged in the motor itself, and can determine the wheel speed of the wheel based on the signal output by the detection sensor, thereby reducing the production cost, reducing the number of parts, reducing the structural complexity at the wheel, and improving the reliability.

[0085] It should be noted that, according to the needs of implementation, each component / step described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or part of the operation of the components / steps can be combined into a new component / step, to achieve the purpose of the embodiments of the present application.

[0086] Those skilled in the art can appreciate that the units and method steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present application.

[0087] The above embodiments are only used for describing the present application, and are not intended to limit the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions belong to the scope of the present application, and the patent protection scope of the present application should be defined by the claims.

Claims

1. A signal processing device for an electric vehicle, characterized by comprising: The electric vehicle comprises a motor (11), a motor controller (15) for controlling the motor (11), and an anti-lock device (16), the motor (11) is provided with a detection sensor for detecting rotation information of the motor (11), and the detection sensor outputs a signal containing the rotation information to the motor controller (15); The signal processing device comprises a signal processor (20), which is connected with the detection sensor and the anti-lock device (16) respectively, and processes the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device (16); The signal processor (20) comprises a signal conversion circuit (22), which is connected with the detection sensor and converts a multi-phase voltage signal output by the detection sensor into a single-phase voltage signal, and makes the output signal jump when a jump is detected in any phase of the multi-phase voltage signal; The detection sensor comprises a first phase output port, a second phase output port and a third phase output port; The signal conversion circuit (22) comprises a first XOR chip and a second XOR chip, the first XOR chip comprises a first input end, a second input end and a first output end, the second XOR chip comprises a third input end, a fourth input end and a second output end, the first input end is connected with the first phase output port, the second input end is connected with the second phase output port, the first output end is connected with the third input end, and the fourth input end is connected with the third phase output port, so as to convert a three-phase voltage signal output by the detection sensor into a single-phase voltage signal; Or, The signal conversion circuit (22) comprises at least a first transistor circuit unit (221) and a second transistor circuit unit (222), the first transistor circuit unit (221) is used for performing first XOR processing on voltage signals output by the first phase output port and the second phase output port, the second transistor circuit unit (222) is used for performing second XOR processing on a result of the first XOR processing and a voltage signal output by the third phase output port, and outputting a single-phase voltage signal.

2. The signal processing device of claim 1, wherein, The signal processor (20) comprises an analog wheel speed sensor circuit (21), which is connected with the detection sensor and converts a voltage signal output by the detection sensor into a current signal available for the anti-lock device.

3. The signal processing device of claim 2, wherein, The analog wheel speed sensor circuit (21) is connected with the signal conversion circuit (22) and converts an input voltage signal into a current signal available for the anti-lock device.

4. The signal processing device of claim 2, wherein The analog wheel speed sensor circuit (21) comprises a first current limiting circuit (211), a second current limiting circuit (212) and a switching circuit (213); The first current limiting circuit (211) is connected with the anti-lock device (16) to output a first current value to the anti-lock device (16); The second current limiting circuit (212) is connected with the anti-lock device (16) through the switch circuit (213), the switch circuit (213) is used for receiving a phase voltage signal and being closed or opened under the control of the phase voltage signal, so as to connect or disconnect the second current limiting circuit (212) with the anti-lock device (16), the phase voltage signal is the signal output by the detection sensor or the signal output by the signal conversion circuit (22).

5. The signal processing device according to claim 1 or 2, characterized by The signal processing device further comprises a first signal transmission branch (31), a second signal transmission branch (32) and a third signal transmission branch, the first signal transmission branch (31) is used for connecting between the detection sensor and the motor controller (15) to transmit the signal output by the detection sensor to the motor controller (15), the second signal transmission branch (32) is used for connecting the signal processor (20) and the first signal transmission branch (31), and the third signal transmission branch is used for connecting the signal processor (20) and the anti-lock device (16).

6. The signal processing device according to claim 5, characterized in that, The signal processing device further comprises a cable, the signal processor (20) is integrally packaged with the cable, the cable comprises a first cable segment and a second cable segment, the first cable segment is used for connecting the detection sensor and the signal processor (20), the second cable segment comprises a first sub-cable segment and a second sub-cable segment, the first sub-cable segment is used for connecting the signal processor (20) and the motor controller (15), and the second sub-cable segment is used for connecting the signal processor (20) and the anti-lock device (16). Or, The signal processing device comprises a third cable segment and a fourth cable segment, the third cable segment is used for connecting the detection sensor and the motor controller (15), the signal processor (20) is packaged in the second cable segment, and a first end of the fourth cable segment is used for connecting the detection sensor, and the fourth cable segment is used for connecting the anti-lock device (16).

7. An electric vehicle, characterized by The electric vehicle comprises a wheel (14) and a motor (11), the motor (11) carries a detection sensor for detecting the rotation information of the motor (11), the electric vehicle further comprises a motor controller (15) for controlling the motor (11), a braking system connected with the wheel (14), an anti-lock device (16) connected with the braking system, and the signal processing device according to any one of claims 1-6, the signal processing device is connected with the motor controller (15), the detection sensor and the anti-lock device respectively, transmits the signal output by the detection sensor to the motor controller (15), and processes the signal output by the detection sensor into an anti-lock control signal available for the anti-lock device (16) to transmit to the anti-lock device (16).

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