Sensor testboard based on Ethernet control

Abstract

The utility model provides a sensor testboard based on Ethernet control. The sensor testboard comprises an Ethernet network, a motor servo system, a channel switching system, an upper computer and a sensor, the channel switching system comprises a power supply and a signal interface, and the sensor is in electrical signal connection with the channel switching system through the power supply and the signal interface; the sensor is in signal connection with the upper computer; the topology architecture of the Ethernet network is a bus type topology architecture, and the motor servo system, the channel switching system and the upper computer are respectively in signal connection with the Ethernet network. The sensor testboard based on Ethernet control is simple and reasonable in structure, strong in adaptability, simple in topology, easy to maintain, high in subsystem integration, fast in test response speed, high in test efficiency, high in system stability, high in maintainability and expansibility, capable of being carried at a high speed and supporting remote test, and suitable for popularization and application. The requirements of an axle detection system can be met, and the rail transit detection control efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor rotation speed calibration, in particular to a sensor test bench based on Ethernet control. Background Art

[0002] Wheel-axle sensors are installed on the wheels of rail transit trains to measure motion parameters such as the speed, direction, and distance of wheel rotation.

[0003] The speed measurement accuracy of the sensor plays a very important role in the function of the axle control system. Therefore, sensor speed calibration is very necessary in the daily maintenance of rail transit, and the accuracy of sensor acquisition accuracy must be ensured.

[0004] However, the existing sensor speed calibration system adopts serial bus control and hybrid bus communication control methods, which have low control efficiency, poor system stability, and poor maintainability and scalability. Utility Model Content

[0005] In view of this, the purpose of the utility model is to design a sensor test bench based on Ethernet control for sensor speed calibration, with a simple and reasonable architecture, strong adaptability, high system stability, good maintainability and scalability, which meets the needs of the axle detection system and improves the efficiency of rail transit detection and control.

[0006] The utility model provides a sensor test bench based on Ethernet control, comprising:

[0007] Ethernet network, motor servo system, channel switching system, host computer, sensor;

[0008] Wherein, the channel switching system includes: a power supply and a signal interface, and the sensor is electrically connected to the channel switching system through the power supply and the signal interface; the sensor is connected to the host computer by signal;

[0009] The topology of the Ethernet network is a bus topology, and the motor servo system, the channel switching system, and the host computer are respectively connected to the Ethernet network by signals.

[0010] Furthermore, the transmission medium of the Ethernet network adopts any one of coaxial cable, twisted pair and optical fiber.

[0011] Furthermore, the sensor is a Hall effect magnetic sensor.

[0012] The Hall Effect Magnetic Sensor (Hall Sensor) is a magnetic field sensor made based on the Hall Effect. The Hall Effect is a type of magnetoelectric effect. The main function of the Hall Effect Sensor is to identify the phase position information of the motor winding and convert it into an electrical signal. The driver obtains the rotor position information by reading the output level signal of the Hall element. The logic switch completes the correct commutation according to the rotor position information of the motor, passes current to the corresponding winding of the motor, and forms an air gap rotating magnetic field to keep the motor running. Hall Effect Magnetic Sensors are widely used to identify the relative position between the stator and rotor of the motor and realize the electronic commutation of the motor.

[0013] The Hall voltage changes with the change of magnetic field strength. The stronger the magnetic field, the higher the voltage, and the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, usually only a few millivolts, but after being amplified by the amplifier in the integrated circuit, the voltage can be amplified to a level sufficient to output a strong signal. If the Hall integrated circuit is to be used as a sensor, a mechanical method is needed to change the magnetic field strength. A rotating impeller is used as a switch to control the magnetic flux. When the impeller blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field deviates from the integrated chip and the Hall voltage disappears. In this way, the change in the output voltage of the Hall integrated circuit can indicate a certain position of the impeller drive shaft. Using this working principle, the Hall integrated circuit chip can be used as an ignition timing sensor. The Hall effect sensor is a passive sensor that requires an external power supply to work. This feature enables it to detect low-speed operation.

[0014] Furthermore, the motor servo system includes: a servo motor and a servo controller, and the servo controller is connected to the servo motor signal.

[0015] Servo motors can control speed and position with high accuracy, and can convert voltage signals into torque and speed to drive the controlled object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator with small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor output shaft. The main feature of the servo motor is that there is no self-rotation when the signal voltage is zero, and the speed decreases uniformly with the increase of torque.

[0016] Furthermore, the servo motor includes any one of two types: a DC servo motor and an AC servo motor.

[0017] AC servo motors are controlled by sine waves with small torque pulsation; DC servos are controlled by trapezoidal waves, but DC servo motors are simpler and have lower costs.

[0018] Further, the power supply and signal interface include: a power supply interface and a signal interface; wherein the power supply interface includes: one or more of a 24-pin power supply interface, a D-type large 4-pin power supply interface, a small 4-pin power supply interface, a SATA power supply interface, a USB power supply interface, and a Type-C power supply interface;

[0019] The signal interface includes: one or more of an RJ45 interface, an RJ48 interface, and an RS232 interface.

[0020] Furthermore, the channel switching system includes: one or more of a switch, a multi-computer switch KVM, and a multi-port repeater HUB.

[0021] Furthermore, the host computer includes: one or more of a personal computer PC, an industrial computer, and a server.

[0022] The host computer is a computer that can directly issue control commands, and the screen displays various signal changes (hydraulic pressure, water level, temperature, etc.). The slave computer is a computer that directly controls the equipment to obtain the equipment status. The command issued by the host computer is first given to the slave computer, and the slave computer then interprets the command into the corresponding timing signal to directly control the corresponding equipment. The slave computer reads the equipment status data (usually analog quantity) from time to time, converts it into digital signals and feeds it back to the host computer.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The sensor test bench based on Ethernet control for sensor speed calibration provided by the utility model has a simple and reasonable architecture, strong adaptability, simple and easy maintenance topology, highly integrated subsystems, fast test response speed, high test efficiency, improved system stability, high-speed portability and support for remote testing, high maintainability and high scalability, can meet the needs of axle detection systems, and effectively improves the efficiency of rail transit detection and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0026] In the attached picture:

[0027] Figure 1 This is a topological architecture diagram of a sensor test bench based on Ethernet control in the utility model. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0030] It should be understood that although the terms first, second, and third may be used in the present disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0031] The present invention provides a sensor test bench based on Ethernet control. Figure 1 As shown, including:

[0032] Ethernet network, motor servo system, channel switching system, host computer, sensor;

[0033] Wherein, the channel switching system includes: a power supply and a signal interface, and the sensor is electrically connected to the channel switching system through the power supply and the signal interface; the sensor is connected to the host computer by signal;

[0034] The topology of the Ethernet network is a bus topology, and the motor servo system, the channel switching system, and the host computer are respectively connected to the Ethernet network by signals.

[0035] The transmission medium of the Ethernet network is coaxial cable, twisted pair or optical fiber.

[0036] The sensor adopts a Hall effect magnetic sensor.

[0037] The Hall Effect Magnetic Sensor (Hall Sensor) is a magnetic field sensor made based on the Hall Effect. The Hall Effect is a type of magnetoelectric effect. The main function of the Hall Effect Sensor is to identify the phase position information of the motor winding and convert it into an electrical signal. The driver obtains the rotor position information by reading the output level signal of the Hall element. The logic switch completes the correct commutation according to the rotor position information of the motor, passes current to the corresponding winding of the motor, and forms an air gap rotating magnetic field to keep the motor running. Hall Effect Magnetic Sensors are widely used to identify the relative position between the stator and rotor of the motor and realize the electronic commutation of the motor.

[0038] The Hall voltage changes with the change of magnetic field strength. The stronger the magnetic field, the higher the voltage, and the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, usually only a few millivolts, but after being amplified by the amplifier in the integrated circuit, the voltage can be amplified to a level sufficient to output a strong signal. If the Hall integrated circuit is to be used as a sensor, a mechanical method is needed to change the magnetic field strength. A rotating impeller is used as a switch to control the magnetic flux. When the impeller blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field deviates from the integrated chip and the Hall voltage disappears. In this way, the change in the output voltage of the Hall integrated circuit can indicate a certain position of the impeller drive shaft. Using this working principle, the Hall integrated circuit chip can be used as an ignition timing sensor. The Hall effect sensor is a passive sensor that requires an external power supply to work. This feature enables it to detect low-speed operation.

[0039] The motor servo system comprises: a servo motor and a servo controller, wherein the servo controller is connected to the servo motor signal.

[0040] Servo motors can control speed and position with high accuracy, and can convert voltage signals into torque and speed to drive the controlled object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator with small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor output shaft. The main feature of the servo motor is that there is no self-rotation when the signal voltage is zero, and the speed decreases uniformly with the increase of torque.

[0041] The servo motor is an AC servo motor, which is sinusoidally controlled and has small torque pulsation.

[0042] The power supply and signal interface include: a power supply interface and a signal interface;

[0043] Among them, the power supply interface includes: 24pin power supply interface, D-type large 4pin power supply interface, small 4pin power supply interface, SATA power supply interface, USB power supply interface, Type-C power supply interface;

[0044] The signal interface includes: RJ45 interface, RJ48 interface, and RS232 interface.

[0045] In this embodiment, the channel switching system adopts a multi-computer switch KVM.

[0046] In this embodiment, the host computer is an industrial computer.

[0047] The host computer is a computer that can directly issue control commands, and the screen displays various signal changes (hydraulic pressure, water level, temperature, etc.). The slave computer is a computer that directly controls the equipment to obtain the equipment status. The command issued by the host computer is first given to the slave computer, and the slave computer then interprets the command into the corresponding timing signal to directly control the corresponding equipment. The slave computer reads the equipment status data (usually analog quantity) from time to time, converts it into digital signals and feeds it back to the host computer.

[0048] The Ethernet-controlled sensor test bench for sensor speed calibration provided by the embodiment of the utility model has a simple and reasonable architecture, strong adaptability, a simple and easy-to-maintain topology, highly integrated subsystems, fast test response speed, high test efficiency, improved system stability, high-speed portability and support for remote testing, high maintainability and high scalability, can meet the needs of the axle detection system, and effectively improves the efficiency of rail transit detection and control.

[0049] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

[0050] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, replacement, and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sensor test bench based on Ethernet control, characterized in that: include: Ethernet network, motor servo system, channel switching system, host computer, sensor; Wherein, the channel switching system includes: a power supply and a signal interface, and the sensor is electrically connected to the channel switching system through the power supply and the signal interface; the sensor is connected to the host computer by signal; The topology of the Ethernet network is a bus topology, and the motor servo system, the channel switching system, and the host computer are respectively connected to the Ethernet network by signals.

2. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The transmission medium of the Ethernet network is any one of coaxial cable, twisted pair and optical fiber.

3. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The sensor adopts a Hall effect magnetic sensor.

4. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The motor servo system comprises: a servo motor and a servo controller, wherein the servo controller is connected to the servo motor signal.

5. The sensor test bench based on Ethernet control according to claim 4, characterized in that: The servo motor includes any one of two types: a DC servo motor and an AC servo motor.

6. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The power supply and signal interface include: a power supply interface and a signal interface; wherein the power supply interface includes: one or more of a 24-pin power supply interface, a D-type large 4-pin power supply interface, a small 4-pin power supply interface, a SATA power supply interface, a USB power supply interface, and a Type-C power supply interface; The signal interface includes: one or more of an RJ45 interface, an RJ48 interface, and an RS232 interface.

7. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The channel switching system includes: one or more of a switch, a multi-computer switch KVM, and a multi-port repeater HUB.

8. The sensor test bench based on Ethernet control according to claim 1, characterized in that: The host computer includes: one or more of a personal computer PC, an industrial computer, and a server.

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