CN220054058U - Sensor system and electric vehicle - Google Patents
Sensor system and electric vehicle Download PDFInfo
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- CN220054058U CN220054058U CN202321455837.6U CN202321455837U CN220054058U CN 220054058 U CN220054058 U CN 220054058U CN 202321455837 U CN202321455837 U CN 202321455837U CN 220054058 U CN220054058 U CN 220054058U
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Abstract
The utility model discloses a sensor system and an electric vehicle, wherein the sensor system comprises: the device comprises a rotation speed sensor, a power supply module and a rotation speed signal acquisition module; the positive power line of the power supply module is connected with the positive power end of the rotating speed sensor through a first resistor; the signal output end of the rotating speed sensor is connected with a positive power line through a second resistor; the signal input end of the rotating speed signal acquisition module is connected with the connection point of the first resistor and the second resistor; the positive power line is used for supplying power to the rotation speed sensor and transmitting a measurement signal of the rotation speed sensor, and the signal output end of the rotation speed signal acquisition module is used for outputting a rotation speed sampling signal corresponding to the measurement signal.
Description
Technical Field
The embodiment of the utility model relates to a measurement technology, in particular to a sensor system and an electric vehicle.
Background
The sensor is a detecting device, which can sense the measured information and convert the sensed information into electric signals or other information in a required form according to a certain rule to be output.
In order to realize the transmission of measurement signals, a single signal wire is generally adopted between a sensor and a controller for communication connection, when an assembly space is relatively narrow, the difficulty of wiring can be increased, meanwhile, the risk of wire breakage of the signal wire is improved, for example, in an application scene of electric vehicle rotation speed measurement, the signal wire of the sensor is usually led out through a motor shaft of a motor, when the number of the signal wires is too large, the aperture for leading out the signal wire on the motor shaft can be greatly increased, so that the structural strength of the motor shaft is influenced, meanwhile, the failure rate of the signal wire can be improved, and the problem that a motor system fails due to the fact that effective signals cannot be acquired due to the disconnection of the signal wire is increased.
Disclosure of Invention
The utility model provides a sensor system and an electric vehicle, which aim to simplify wiring in the sensor system.
In a first aspect, an embodiment of the present utility model provides a sensor system, including: the device comprises a rotation speed sensor, a power supply module and a rotation speed signal acquisition module;
the positive power line of the power supply module is connected with the positive power end of the rotating speed sensor through a first resistor;
the signal output end of the rotating speed sensor is connected with the positive power line through a second resistor;
the signal input end of the rotating speed signal acquisition module is connected with the connection point of the first resistor and the second resistor;
the positive power line is used for supplying power to the rotating speed sensor and transmitting a measuring signal of the rotating speed sensor;
and the signal output end of the rotating speed signal acquisition module is used for outputting a rotating speed sampling signal corresponding to the measuring signal.
Optionally, the device further comprises a controller;
and the signal output end of the rotating speed signal acquisition module is connected with the controller.
Optionally, the motor sensor is also included;
the motor sensor is connected with the controller through a motor sensor interface module, and is used for measuring the rotation angle of the three-phase motor.
Optionally, the positive power line of the power module is further connected with a positive power end of the motor sensor through the first resistor;
the positive power line is also used for powering the motor sensor.
Optionally, the motor sensor is installed at one side of the motor, and a signal output line of the motor sensor is led out through a motor shaft of the motor;
after being led out, the signal output line is connected with the controller through the motor sensor interface module.
Optionally, the motor sensor comprises a first hall sensor, a second hall sensor and a third hall sensor;
the motor sensor interface module is a Hall sensor interface module;
the first Hall sensor, the second Hall sensor and the third Hall sensor are respectively used for measuring the one-phase rotation angle of the three-phase motor.
Optionally, the measurement signal of the rotation speed sensor is a square wave signal.
Optionally, the rotation speed sensor is a hall sensor.
Optionally, the negative power supply end of the rotation speed sensor is grounded with the negative power supply end of the power supply module.
In a second aspect, an embodiment of the present utility model further provides an electric vehicle, including any one of the sensor systems described in the embodiments of the present utility model.
Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a sensor system, which comprises a rotating speed sensor, a power supply module and a rotating speed signal acquisition module, wherein a power supply end and a signal output end of the rotating speed sensor and the rotating speed signal acquisition module are connected with a positive power line of the power supply module.
Drawings
FIG. 1 is a block diagram of a sensor system architecture in an embodiment;
FIG. 2 is a schematic diagram of a rotational speed sensor measurement signal in an embodiment;
FIG. 3 is a block diagram of another sensor system configuration in an embodiment;
fig. 4 is a block diagram of still another sensor system in an embodiment.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Example 1
FIG. 1 is a block diagram of a sensor system in an embodiment, referring to FIG. 1, the sensor system includes: a rotation speed sensor 100, a power supply module 200 and a rotation speed signal acquisition module 300;
the positive power line of the power module 200 is connected with the positive power end of the rotation speed sensor 100 through a first resistor R2;
the signal output end of the rotation speed sensor 100 is connected with a positive power line through a second resistor R1;
the signal input end of the rotation speed signal acquisition module 300 is connected with the connection point of the first resistor R1 and the second resistor R2.
In this embodiment, the rotation speed sensor 100 is used for measuring the rotation speed of a device under test (e.g. a motor), wherein the measurement principle of the rotation speed sensor 100 is defined as follows:
when the rotational position of the device under test reaches a preset position relative to the rotational speed sensor 100, the rotational speed sensor 100 outputs a level signal, which is recorded as a first level signal, and when the rotational position of the device under test is at the rest position relative to the rotational speed sensor 100, the rotational speed sensor 100 outputs another level signal having a potential opposite to that of the first level signal, which is recorded as a second level signal, and the rotational speed of the device under test is determined according to the occurrence frequency of the first level signal and/or the second level signal in one period.
In the present embodiment, the type of the rotation speed sensor 100 is not limited, and for example, a hall sensor, a laser sensor, an ultrasonic sensor, or the like may be selected as the rotation speed sensor 100.
In the present embodiment, a positive power supply line is set for power supply of the rotation speed sensor 100, and a measurement signal of the rotation speed sensor 100 is transmitted.
Referring to fig. 1, in the present embodiment, the power supply module 200 is set as a dc power supply module, and the measurement signal of the rotation speed sensor 100 is modulated onto the positive power line through the first resistor R1 and the second resistor R2, and then the measurement signal is transmitted to the rotation speed signal acquisition module 300 through the positive power line and received by the rotation speed signal acquisition module 300;
the signal output end of the set rotation speed signal acquisition module 300 is configured to output a rotation speed sampling signal corresponding to the measurement signal, where the rotation speed sampling signal may be the same as the measurement signal, or the rotation speed sampling signal may be the measurement signal processed by a preset signal processing method.
In this embodiment, the specific way to modulate the measurement signal of the rotation speed sensor 100 onto the positive power line through the first resistor R1 and the second resistor R2 is that:
when the first level is output by the rotation speed sensor 100 as a signal, the voltage at the signal input end of the rotation speed signal acquisition module 300 is the output voltage VDD of the power supply module 200;
when the rotation speed sensor 100 outputs the second level as the signal, the voltage at the signal input end of the rotation speed signal acquisition module 300 is determined by the voltage division of the first resistor R1 and the second resistor R2;
fig. 2 is a schematic diagram of a measurement signal of a rotation speed sensor in an embodiment, referring to fig. 2, a waveform of the measurement signal modulated onto a positive power line through a first resistor R1 and a second resistor R2 is a square wave.
For example, in the present embodiment, the specific form of the tacho signal collection module 300 is not limited, and for example, the tacho signal collection module 300 may be designed based on a microcontroller (Microcontroller Unit, MCU) or a single chip microcomputer.
In this embodiment, the rotational speed sampling signal output by the rotational speed signal acquisition module 300 may be received by an upper control module (e.g., a main control chip, a whole vehicle control chip, etc.), and the upper control module may be configured to execute a preset control logic according to the received rotational speed sampling signal.
The embodiment provides a sensor system, the system includes a rotation speed sensor, a power module and a rotation speed signal acquisition module, wherein, the power end and the signal output end of the rotation speed sensor and the rotation speed signal acquisition module are all connected with the positive power line of the power module, based on this, the measurement signal of the rotation speed sensor can be transmitted while the power is supplied to the rotation speed sensor through the positive power line of the power module, and further, the additional signal line is not required to be configured for the rotation speed sensor, so that the wiring in the sensor system is simplified.
Fig. 3 is a block diagram of another sensor system according to an embodiment, referring to fig. 3, in an alternative embodiment, based on the scheme shown in fig. 1, the sensor system further includes a controller 400, and a signal output end of the rotational speed signal acquisition module 300 is connected to the controller 400.
In this embodiment, the controller 400 is used as an upper control module, and the controller 400 is configured to execute a preset control logic according to the received rotation speed sampling signal, for example, generate a control instruction for the device under test according to the rotation speed sampling signal, so that the rotation speed of the device under test is increased or decreased to the target rotation speed.
Referring to fig. 3, on the basis that the sensor system includes a control 400, in one embodiment, the sensor system further includes a motor sensor 500, and the motor sensor 500 is connected to the controller 400 through a motor sensor interface module 600.
Illustratively, in the present embodiment, a sensor system is provided for measurement and control of the motor, and accordingly, the rotational speed sensor 100 is provided for measuring the rotational speed of the motor, and the motor sensor 500 is provided for measuring the rotational angle of the three-phase motor.
Illustratively, in this embodiment, the motor sensor interface module 600 is configured to implement processing (such as signal amplification, digital-to-analog conversion of a signal, etc.) on the measurement signal output by the motor sensor 500, so that the measurement signal may be received by the controller 400.
Illustratively, in this embodiment, the motor sensor interface module 600 may include a variety of signal processing chips (including corresponding peripheral circuits) according to design requirements;
for example, the motor sensor interface module 600 may include a voltage-to-current conversion chip, a digital-to-analog conversion chip, a filter chip, a digital signal processing chip, and the like.
In this embodiment, the controller 400 may be configured to implement control over the motor by using an SVPWM method, where the measured rotation angle of the three-phase motor may be used to determine a movement position of the rotor of the three-phase motor, so that the controller 400 may generate a driving signal for controlling the motor driving circuit according to the movement position of the rotor to control the motor to move;
in this scheme, the SVPWM control is the same as the prior art, and the specific implementation process thereof is not described in detail, where the manner of acquiring other motor parameters when the controller 400 generates the driving signal according to the SVPWM control method is not limited, and it can be freely set according to the requirement.
Referring to fig. 3, in one embodiment, the positive power line of the power module 200 is also connected to the positive power terminal of the motor sensor 500 through a first resistor R1, based on the sensor system including the control 400.
In this solution, the positive power line of the power module 200 is also used for supplying power to the motor sensor 500, that is, the power module 200 is configured to simultaneously supply power to the rotation speed sensor 100 and the motor sensor 500.
Referring to fig. 3, in one embodiment, on the basis that the sensor system includes the control 400, a motor sensor 500 is set to be installed at one side of the motor, and a signal output line of the motor sensor 500 is led out through a motor shaft of the motor;
after being led out, a signal output line of the motor sensor 500 is connected with the controller 400 through the motor sensor interface module 600.
Illustratively, in this solution, an opening may be formed in the motor shaft, and the signal output line is set to be led out through the opening in the motor shaft.
In this embodiment, the set rotation speed sensor 100 is also disposed on the motor side, and the wiring manner of the positive power line of the power module 200 is not limited, but the positive power line is not led out through the motor shaft of the motor.
On the basis that the sensor system comprises the control 400, in one possible embodiment, the motor sensor comprises a first hall sensor, a second hall sensor and a third hall sensor, and the motor sensor interface module is a hall sensor interface module;
the first Hall sensor, the second Hall sensor and the third Hall sensor are respectively used for measuring the one-phase rotation angle of the three-phase motor.
In the scheme, the steering of the motor can be determined through the measurement information of the first Hall sensor, the second Hall sensor and the third Hall sensor, and a certain basis is provided for the controller to generate a control signal for the motor.
Based on the scheme shown in fig. 1, in one possible embodiment, the rotation speed sensor 100 adopts a hall sensor, and the stability, the precision and the response speed of rotation speed measurement can be ensured by adopting the hall sensor to realize rotation speed measurement.
Based on the scheme shown in fig. 1, in one possible embodiment, the negative power supply end of the rotation speed sensor 100 and the negative power supply end of the power supply module 200 are set to be commonly grounded, and the wiring difficulty of the sensor system can be reduced by setting the rotation speed sensor 100 and the negative power supply end of the power supply module 200 to be commonly grounded.
Illustratively, in this embodiment, any of the above-mentioned sensor system counterparts may be freely arranged and combined, and fig. 4 is a block diagram of still another sensor system structure in this embodiment, and referring to fig. 4, for example, in one possible implementation, the sensor system includes:
the device comprises a rotating speed sensor 100, a power supply module 200, a rotating speed signal acquisition module 300, a controller 400, a first Hall sensor 501, a second Hall sensor 502, a third Hall sensor 503 and a Hall sensor interface module 601;
the positive power line of the power module 200 is connected with the positive power end of the rotation speed sensor 100 through a first resistor R2, and the negative power end of the rotation speed sensor 100 and the negative power end of the power module 200 are grounded together;
the signal output end of the rotation speed sensor 100 is connected with a positive power line through a second resistor R1;
the signal input end of the rotating speed signal acquisition module 300 is connected with the connection point of the first resistor R1 and the second resistor R2, and the signal output end of the rotating speed signal acquisition module 300 is connected with the controller 400;
the positive power line of the power module 200 is also connected with positive power ends of the first hall sensor 501, the second hall sensor 502 and the third hall sensor 503 through a first resistor R1 respectively;
the first hall sensor 501, the second hall sensor 502 and the third hall sensor 503 are also respectively connected with the controller 400 through the hall sensor interface module 601;
the first Hall sensor 501, the second Hall sensor 502, the third Hall sensor 503, the rotation speed sensor 100 and the second resistor R2 are arranged on one side of the motor;
the power module 200, the rotating speed signal acquisition module 300, the Hall sensor interface module 601 and the first resistor R1 of the controller 400 are arranged on the other side of the motor;
wherein, the motor shaft of the motor is provided with an opening, and the signal output lines of the first Hall sensor 501, the second Hall sensor 502 and the third Hall sensor 503 are respectively led out through the motor shaft of the motor;
after being led out, the signal output lines of the first hall sensor 501, the second hall sensor 502 and the third hall sensor 503 are connected with the controller 400 through the hall sensor interface module 601.
In the scheme, a Hall sensor is adopted as the set rotating speed sensor 100, when the rotating position of the motor reaches a preset position relative to the rotating speed sensor 100, the rotating speed sensor 100 outputs a high-level signal which is marked as a first-level signal, and when the rotating position of the motor is at other positions relative to the rotating speed sensor 100, the rotating speed sensor 100 outputs a low-level signal which is marked as a second-level signal;
when the first level is output by the rotation speed sensor 100 as a signal, the voltage at the signal input end of the rotation speed signal acquisition module 300 is the output voltage VDD of the power supply module 200;
when the rotation speed sensor 100 outputs the second level as the signal, the voltage at the signal input end of the rotation speed signal acquisition module 300 is determined by the voltage division of the first resistor R1 and the second resistor R2;
the output signal of the rotation speed sensor 100 is modulated to the positive power line through the first resistor R1 and the second resistor R2, and the measurement signal is a square wave as shown in fig. 2;
the rotation speed signal acquisition module 300 is configured to acquire a modulated measurement signal from a positive power line, and send the measurement signal to the controller 400, where the controller 400 determines the rotation speed of the motor from the measurement signal, and executes a preset control logic according to the rotation speed of the motor.
In this solution, the first hall sensor 501, the second hall sensor 502, and the third hall sensor 503 are set to be installed at one side of the motor, and the signal output lines of the first hall sensor 501, the second hall sensor 502, and the third hall sensor 503 are led out through the motor shaft of the motor;
the positive power line of the power module is not through the motor shaft, but is arranged independently, and as the signal line of the rotation speed sensor 100 is omitted, the opening of the motor shaft is not required to be enlarged, the reliability of the motor shaft structure is ensured, and meanwhile, the risk of electric vehicle faults caused by broken signal lines of the rotation speed sensor 100 can be reduced.
Example two
The embodiment provides an electric vehicle, including any one of the sensor systems described in the first embodiment, and its implementation manner and beneficial effects are the same as those of the corresponding content described in the first embodiment, and specific content is not repeated.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A sensor system, comprising: the device comprises a rotation speed sensor, a power supply module and a rotation speed signal acquisition module;
the positive power line of the power supply module is connected with the positive power end of the rotating speed sensor through a first resistor;
the signal output end of the rotating speed sensor is connected with the positive power line through a second resistor;
the signal input end of the rotating speed signal acquisition module is connected with the connection point of the first resistor and the second resistor;
the positive power line is used for supplying power to the rotating speed sensor and transmitting a measuring signal of the rotating speed sensor;
and the signal output end of the rotating speed signal acquisition module is used for outputting a rotating speed sampling signal corresponding to the measuring signal.
2. The sensor system of claim 1, further comprising a controller;
and the signal output end of the rotating speed signal acquisition module is connected with the controller.
3. The sensor system of claim 2, further comprising a motor sensor;
the motor sensor is connected with the controller through a motor sensor interface module, and is used for measuring the rotation angle of the three-phase motor.
4. The sensor system of claim 3, wherein a positive power line of the power module is further connected to a positive power terminal of the motor sensor through the first resistor;
the positive power line is also used for powering the motor sensor.
5. A sensor system according to claim 3, wherein the motor sensor is mounted on one side of a motor, and a signal output line of the motor sensor is led out through a motor shaft of the motor;
after being led out, the signal output line is connected with the controller through the motor sensor interface module.
6. The sensor system of claim 3, wherein the motor sensor comprises a first hall sensor, a second hall sensor, a third hall sensor;
the motor sensor interface module is a Hall sensor interface module;
the first Hall sensor, the second Hall sensor and the third Hall sensor are respectively used for measuring the one-phase rotation angle of the three-phase motor.
7. The sensor system of claim 1, wherein the measurement signal of the rotational speed sensor is a square wave signal.
8. The sensor system of claim 7, wherein the rotational speed sensor is a hall sensor.
9. The sensor system of claim 1, wherein a negative supply terminal of the tachometer sensor is common to a negative supply terminal of the power module.
10. An electric vehicle comprising the sensor system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321455837.6U CN220054058U (en) | 2023-06-08 | 2023-06-08 | Sensor system and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321455837.6U CN220054058U (en) | 2023-06-08 | 2023-06-08 | Sensor system and electric vehicle |
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| Publication Number | Publication Date |
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| CN220054058U true CN220054058U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321455837.6U Active CN220054058U (en) | 2023-06-08 | 2023-06-08 | Sensor system and electric vehicle |
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| CN (1) | CN220054058U (en) |
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- 2023-06-08 CN CN202321455837.6U patent/CN220054058U/en active Active
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