Signal synchronization test device of magnetoelectric sensor and test method thereof

Abstract

The invention provides a signal synchronization test device of a magnetoelectric sensor and a test method thereof, the signal synchronization test device of the magnetoelectric sensor comprises at least one magnetoelectric sensor and an excitation system, the output signal end of the magnetoelectric sensor is connected with an oscilloscope; and the excitation system is used for carrying out magnetic field interaction with the detection end of the magnetoelectric sensor according to different parameters so as to simulate different magnetic fields. The excitation system is used for simulating induction conditions of different magnetoelectric sensors so as to simulate magnetic field changes of different fluted discs, and the technical problem that in the prior art, a signal synchronization test device of the magnetoelectric sensor can correspondingly simulate different fluted disc magnetic field change tests is lacked can be solved.

Description

Technical field:

[0001] The invention relates to the field of sensor testing, and in particular to a signal synchronization testing device for a magnetoelectric sensor and a testing method thereof. Background technology:

[0002] Today's diesel engines are experiencing the third technological leap with diesel engine electronic control as the core. ECU technology is one of the core technologies of diesel engine electronic control. It collects signals such as engine phase, speed (n), fuel pressure, throttle position, temperature, etc., obtains pumping and injection parameters through certain algorithms, and drives the corresponding actuators to work. In electronically controlled engines, the crankshaft and camshaft phase sensor signals are the basis of the entire ECU working sequence, and their function is equivalent to the clock signal that enables the digital circuit to work normally. The engine speed, injection, start and stop and other actions are all obtained through the signals from these two sensors.

[0003] The principle of sensor signal collection is that the crankshaft and camshaft rotate, and the teeth on the signal gear plate cut the magnetic lines of force in the sensor, generating electromotive force. The electromotive force generated when cutting the magnetic lines of force is collected by an oscilloscope, and the generated waveform and frequency represent the rotation speed of the speed plate and phase plate.

[0004] As diesel engine technical indicators become higher and higher and the speed becomes higher and higher, technicians face three main problems when designing and verifying phase and speed signals: (1) When collecting these two signals, they are often calibrated directly on the diesel engine, or a signal gear with the same structure is processed and driven by a motor to simulate the rotation on the diesel engine. This is not only inefficient but also high-risk; (2) When the diesel engine speed is too high or too low, the sensor signal may be distorted, causing the diesel engine to stop in an emergency, and the collection of the limit speed signal is inaccurate; (3) When the diesel engine speed is too high, the speed difference between the phase disk and the speed disk cutting the magnetic flux lines becomes larger and larger, and the phase signal may shift.

[0005] Therefore, there is an urgent need for a signal synchronization test device for a magnetoelectric sensor, which helps to solve the technical problem in the prior art that there is a lack of a signal synchronization test device for a magnetoelectric sensor that can simulate the magnetic field change tests of different sprockets. Summary of the invention:

[0006] In one embodiment, the present invention provides a signal synchronization test device for a magnetoelectric sensor, which simulates different induction conditions of the magnetoelectric sensor through an excitation system to simulate the magnetic field changes of different gear discs, thereby helping to solve the technical problem in the prior art of lacking a signal synchronization test device for a magnetoelectric sensor that can simulate the magnetic field change tests of different gear discs.

[0007] The signal synchronization test device of the magnetoelectric sensor comprises at least one magnetoelectric sensor and an excitation system;

[0008] The output signal end of the magnetoelectric sensor is connected to an oscilloscope;

[0009] The excitation system is used to interact with the detection end of the magnetoelectric sensor with different parameters to simulate different magnetic fields.

[0010] In one embodiment, the excitation system includes an excitation device and an excitation device driving device, and an excitation device driving power supply;

[0011] The excitation device interacts with the detection end of the magnetoelectric sensor in a magnetic field;

[0012] The excitation device driving device is used to control and drive the excitation device;

[0013] The excitation device driving power supply is used to supply power to the excitation device through the excitation device driving equipment.

[0014] In one embodiment, the present invention further provides a signal synchronization test device test method for a magnetoelectric sensor. Based on the signal synchronization test device for the magnetoelectric sensor, the signal synchronization test device test method for the magnetoelectric sensor includes:

[0015] said adjusting the distance between said detection end and said excitation system;

[0016] Different target magnetic fields are formed by inputting different parameters through the excitation system to simulate the signal of cutting magnetic flux lines during the rotation of the disk at different speeds;

[0017] The output signal end of the magnetoelectric sensor displays a waveform through the oscilloscope.

[0018] In one embodiment, the parameters include current, voltage, and frequency.

[0019] In one embodiment, the hysteresis effect in the process of missing speed teeth and synchronizing phase teeth is simulated by adjusting the input driving signal.

[0020] In one embodiment, the magnetoelectric sensor is a Hall sensor.

[0021] In one embodiment, the detection end includes an outer shell and an inner magnet, as well as an iron core and a coil;

[0022] The internal magnet is disposed inside the external housing;

[0023] The iron core is arranged inside the internal magnet, and one end of the iron core abuts against the internal magnet;

[0024] The coil is disposed in the outer housing and is wound around the iron core.

[0025] In one embodiment, the end surface of the protruding end of the core interacts with the excitation system in a magnetic field.

[0026] In one embodiment, the distance is the distance between the lower end surface of the sensor and the limit fixture, simulating the distance between the speed sensor, the phase sensor and the gear wheel.

[0027] In one embodiment, the low frequency signal is adjusted to simulate the phase signal synchronization function of a diesel engine which is difficult to perform at extremely low speeds. Description of the drawings:

[0028] Figure 1 It is a structural schematic diagram of a single excitation system of a signal synchronization test device for a magnetoelectric sensor in one embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a dual excitation system of a signal synchronization test device for a magnetoelectric sensor in another embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of a sensor in another embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a detection end in another embodiment of the present invention;

[0032] Figure 5 A schematic diagram of a sensor aligned with a tooth gap in another embodiment of the present invention;

[0033] Figure 6 A schematic diagram of a state where a sensor is aligned with a phase tooth in another embodiment of the present invention;

[0034] Figure 7 A schematic diagram of a power-off state of an excitation device in another embodiment of the present invention;

[0035] Figure 8 It is a schematic diagram of the power-on state of the excitation device in another embodiment of the present invention.

[0036] Reference numerals:

[0037] Magnetoelectric sensor 1

[0038] Output signal terminal 11

[0039] Detection end 12

[0040] External housing 121

[0041] Internal magnet 122

[0042] Core 123

[0043] Coil 124

[0044] Oscilloscope 3

[0045] Excitation system 4

[0046] Excitation device 41

[0047] Excitation device drive equipment 42

[0048] Excitation device drive power supply 43 Specific embodiment:

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0051] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0052] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0053] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0054] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0055] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0056] The purpose of the present invention is to overcome the shortcomings of the existing methods and devices used in testing diesel engine synchronization signals, and to provide an efficient and convenient speed phase sensor testing device for simulating diesel engine synchronization signals.

[0057] The device creatively uses the basic principle of speed phase sensor induction magnetic field cutting magnetic flux lines, and uses the excitation electromagnetic field with controllable driving parameters such as frequency and voltage to equivalently replace the fixed magnetic flux cutting characteristics of soft magnetic materials to simulate the measurement of diesel engine synchronization signals.

[0058] Figure 1 It is a structural schematic diagram of a single excitation system of a signal synchronization test device for a magnetoelectric sensor in one embodiment of the present invention; Figure 2 It is a structural schematic diagram of a dual excitation system of a signal synchronization test device for a magnetoelectric sensor in another embodiment of the present invention; Figure 3 A schematic diagram of the structure of a sensor in another embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a detection end in another embodiment of the present invention; Figure 5 A schematic diagram of a sensor aligned with a tooth gap in another embodiment of the present invention; Figure 6 A schematic diagram of a state where a sensor is aligned with a phase tooth in another embodiment of the present invention; Figure 7 A schematic diagram of a power-off state of an excitation device in another embodiment of the present invention; Figure 8 It is a schematic diagram of the power-on state of the excitation device in another embodiment of the present invention.

[0059] like Figures 1 to 7 As shown, in one embodiment, the present invention provides a signal synchronization test device for a magnetoelectric sensor, the signal synchronization test device for a magnetoelectric sensor comprises at least one magnetoelectric sensor 1 and an excitation system 4;

[0060] The output signal terminal 11 of the magnetoelectric sensor 1 is connected to the oscilloscope 3;

[0061] The excitation system 4 is used to interact with the detection end 12 of the magnetoelectric sensor 1 with different parameters to simulate different magnetic fields.

[0062] In this embodiment, a specific structure of a signal synchronization test device for a magnetoelectric sensor is provided. By changing the inductive test mode of the toothed disc and the sensor in the prior art, a magnetic field simulating the corresponding properties of the toothed disc is generated by the excitation system 4, and the magnetic field signal is obtained by the magnetoelectric sensor 1 and displayed by an oscilloscope, which helps to solve the technical problem in the prior art that a signal synchronization test device for a magnetoelectric sensor is lacking that can simulate the magnetic field change test of different toothed discs.

[0063] In addition, a plurality of magnetoelectric sensors 1 can simultaneously enter the same oscilloscope 3. The sensor limiting device 2 is used to fix the detection end 12 for installation and limiting.

[0064] In one embodiment, the excitation system 4 includes an excitation device 41, an excitation device driving device 42, and an excitation device driving power supply 43;

[0065] The excitation device 41 interacts with the detection end 12 of the magnetoelectric sensor 1 through a magnetic field;

[0066] An excitation device driving device 42, used for controlling and driving the excitation device 41;

[0067] The excitation device driving power supply 43 is used to supply power to the excitation device 41 through the excitation device driving equipment 42 .

[0068] In this embodiment, a specific implementation of a specific architecture of an excitation system 4 is provided. Figure 2 As shown, there may also be two excitation devices 41 , which may share an excitation device driving device 42 and an excitation device driving power supply 43 .

[0069] In one embodiment, the present invention further provides a signal synchronization test device test method for a magnetoelectric sensor. Based on the signal synchronization test device for the magnetoelectric sensor, the signal synchronization test device test method for the magnetoelectric sensor includes:

[0070] S101, adjusting the distance between the detection end 12 and the excitation system 4.

[0071] In this step, a specific step of adjusting the distance between the detection end 12 and the excitation system 4 is provided.

[0072] S102, different target magnetic fields are formed by inputting different parameters through the excitation system 4 to simulate the signal of cutting the magnetic flux lines during the rotation of the disk at different speeds.

[0073] In this step, a specific step is provided for forming different target magnetic fields by inputting different parameters through the excitation system 4 to simulate the signal of cutting magnetic flux lines during the rotation of the disk at different speeds.

[0074] S103 , the output signal terminal 11 of the magnetoelectric sensor 1 displays a waveform through the oscilloscope 3 .

[0075] In this step, a specific step is provided in which the output signal terminal 11 of the magnetoelectric sensor 1 displays a waveform through the oscilloscope 3 .

[0076] In this embodiment, a specific implementation of a signal synchronization testing device and a testing method for a magnetoelectric sensor is provided.

[0077] In one embodiment, the parameters include current, voltage, and frequency.

[0078] In this embodiment, a specific implementation method is provided in which the parameters include current, voltage, and frequency.

[0079] In one embodiment, the hysteresis effect in the process of missing speed teeth and synchronizing phase teeth is simulated by adjusting the input driving signal.

[0080] This embodiment provides a specific implementation method for realizing the hysteresis effect in the synchronization process.

[0081] In one embodiment, the magnetoelectric sensor 1 is a Hall sensor.

[0082] In this embodiment, a specific implementation of a magnetoelectric sensor 1 is provided.

[0083] In this embodiment, a specific implementation in which the magnetoelectric sensor 1 is a Hall sensor is provided.

[0084] In one embodiment, the detection end 12 includes an outer shell 121 and an inner magnet 122, as well as an iron core 123 and a coil 124;

[0085] The internal magnet 122 is placed inside the external housing 121;

[0086] The iron core 123 is disposed inside the internal magnet 122 , and one end of the iron core 123 abuts against the internal magnet 122 ;

[0087] The coil 124 is disposed in the outer housing 121 and is wound around the iron core 123 .

[0088] In this embodiment, a specific implementation of the detection end 12 is provided. The internal magnet 122 is equivalent to a permanent magnet source, and the iron core 123 is wound around the coil 124 to trigger the formation of a magnetic field.

[0089] In one embodiment, the end surface of the extended end of the iron core 123 interacts with the excitation system 4 in magnetic field.

[0090] In this embodiment, a specific implementation method is provided for the magnetic field interaction between the end surface of the extended end of the iron core 123 and the excitation system 4 .

[0091] In one embodiment, the distance is the distance between the lower end surface of the sensor and the limit fixture, simulating the distance between the speed sensor, the phase sensor and the gear wheel.

[0092] In this embodiment, a specific implementation method is provided in which the distance is the distance between the lower end surface of the sensor and the limit fixture, simulating the distance between the speed sensor, the phase sensor and the gear plate. In addition to changing the distance, the simulation can also be achieved by adjusting the current.

[0093] In one embodiment, the low frequency signal is adjusted to simulate the phase signal synchronization function of a diesel engine which is difficult to perform at extremely low speeds.

[0094] This embodiment provides a specific implementation method for performing a phase signal synchronization function by adjusting a low-frequency signal.

[0095] Based on the above device structure and method:

[0096] 1. Analog speed signal acquisition:

[0097] Connect the sensor to the speed phase sensor test device that simulates the diesel engine synchronization signal, and carry out the following steps of detection:

[0098] Place the sensor into the sensor limit fixture, adjust the distance between the lower end surface of the sensor and the limit fixture, simulate the distance between the speed sensor and the gear disc, and connect the sensor output signal end to the signal acquisition equipment, such as an oscilloscope;

[0099] Use the excitation device to drive the power supply to power the equipment, adjust the excitation device to drive the equipment, and by inputting different currents, voltages, and frequencies, you can simulate the signal of cutting the magnetic flux lines during the rotation of different speed disks;

[0100] The signal acquisition equipment receives the signal output by the sensor, simulates the different tooth shapes and tooth heights of the engine, and is suitable for various types of diesel engine gears;

[0101] 2. Analog speed and phase signal synchronization function:

[0102] Connect the phase sensor and speed sensor to the speed phase sensor test device that simulates the diesel engine synchronization signal, and carry out the following steps of detection:

[0103] Place the phase sensor and speed sensor into the sensor limit fixture respectively, adjust the distance between the lower end surface of the sensor and the limit fixture, simulate the distance between the speed sensor, phase sensor and the gear disc, and connect the sensor output signal end to the signal acquisition equipment, such as an oscilloscope;

[0104] Use the excitation device to drive the power supply to power the equipment, adjust the excitation device to drive the equipment, and input different analog signals to the speed sensor and phase sensor by inputting different currents, voltages, and frequencies. This can simulate the signals of cutting magnetic flux lines during the rotation of different speed disks and different phase disks.

[0105] By adjusting the input drive signal to simulate the hysteresis effect in the process of speed tooth missing and phase tooth synchronization, it is verified whether the phase tooth signal can fall into the speed tooth missing, which plays a good early verification effect.

[0106] How it works:

[0107] The excitation device drives the power supply to energize, and the excitation device generates a magnetic field. Different driving parameters such as frequency and voltage are input through the excitation device driving equipment to adjust the distribution of magnetic field lines generated by the excitation device. By adjusting the sensor limit device and the distance between the sensor end face and the excitation device end face, the tooth gap between the sensor and the gear disk is simulated. The magnetic lines of force generated by the excitation device are superimposed or offset with the magnetic lines of force in the sensor, simulating the signals generated by the rotation of the speed disk and the phase disk, so as to achieve the purpose of collecting speed phase signals.

[0108] Compared with conventional detection methods, this technology has the following advantages:

[0109] (1) The structure is simple, no need to drive the rotating mechanism, easy to detect, safe and low cost;

[0110] (2) Flexible and adjustable. By changing the driving parameters, such as the driving voltage, the cutting magnetic flux line rate can be adjusted to simulate different tooth shapes and tooth heights of the engine, and it is suitable for various types of diesel engine gears;

[0111] (3) The simulation synchronization function can simulate the hysteresis effect in the process of speed tooth missing and phase tooth synchronization by adjusting the input drive signal, verifying whether the phase tooth signal can fall into the speed tooth missing, which plays a good early verification effect.

[0112] (4) Applicable to various types of sensors, it can be compatible with magnetoelectric sensors and Hall sensors by adjusting the electromagnet drive control signal.

[0113] (5) It can realize the verification of extremely low phase signal synchronization, adjust the low-frequency signal, and simulate the phase signal synchronization function of the diesel engine at extremely low speed, thereby guiding the diesel engine phase tooth design in advance.

[0114] Insert the signal sensor into the sensor limit fixture as shown in the figure. The fixture can continuously adjust the distance between the lower end surface of the sensor and the end of the excitation device to simulate different tooth gaps; connect the sensor output signal end to the signal acquisition equipment, such as an oscilloscope; use the excitation device drive power supply to power the equipment, adjust the excitation device drive equipment, and by inputting different currents, voltages, and frequencies, it can simulate the signal of cutting the magnetic flux lines during the rotation of different speed discs; the signal acquisition equipment receives the signal output by the sensor, simulates different tooth shapes and tooth heights of the engine, and is suitable for various types of diesel engine gear discs.

[0115] Connect the phase sensor and speed sensor to the speed phase sensor test device that simulates the diesel engine synchronization signal, and carry out the following steps of detection:

[0116] Place the phase sensor and speed sensor into the sensor limit fixture respectively, adjust the distance between the lower end surface of the sensor and the limit fixture, simulate the distance between the speed sensor, phase sensor and the gear disc, and connect the sensor output signal end to the signal acquisition equipment, such as an oscilloscope; use the excitation device to drive the power supply to power the equipment, adjust the excitation device to drive the equipment, and input different analog signals to the speed sensor and phase sensor by inputting different currents, voltages, and frequencies. This can simulate the signal of cutting the magnetic flux lines during the rotation of different speed discs and different phase discs; simulate the hysteresis effect during the synchronization of the speed tooth missing tooth and the phase tooth by adjusting the input drive signal, and verify whether the phase tooth signal can fall into the speed tooth missing tooth, which has a good early verification effect.

[0117] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A signal synchronization test device for a magnetoelectric sensor, characterized in that: The signal synchronization test device of the magnetoelectric sensor comprises: At least one magnetoelectric sensor (1), wherein an output signal end (11) of the magnetoelectric sensor (1) is connected to an oscilloscope (3); An excitation system (4) is used to interact with the detection end (12) of the magnetoelectric sensor (1) with different parameters to simulate different magnetic fields.

2. The signal synchronization test device for a magnetoelectric sensor according to claim 1, characterized in that: The excitation system (4) comprises: an excitation device (41) for interacting with the detection end (12) of the magnetoelectric sensor (1) in a magnetic field; an excitation device driving device (42) for controlling and driving the excitation device (41); An excitation device driving power supply (43) is used to supply power to the excitation device (41) via the excitation device driving equipment (42).

3. A signal synchronization test device and test method for a magnetoelectric sensor, characterized in that: Based on the signal synchronization test device of the magnetoelectric sensor according to claim 1 or claim 2, the signal synchronization test device test method of the magnetoelectric sensor comprises: adjusting the distance between the detection end (12) and the excitation system (4); Different target magnetic fields are formed by inputting different parameters through the excitation system (4) to simulate the signal of cutting magnetic flux lines during the rotation of the disk with different speeds; The output signal end (11) of the magnetoelectric sensor (1) displays a waveform through the oscilloscope (3).

4. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 3, characterized in that: The parameters include current, voltage, and frequency.

5. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 4, characterized in that: The hysteresis effect in the process of speed tooth missing and phase tooth synchronization is simulated by adjusting the input drive signal.

6. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 5, characterized in that: The magnetoelectric sensor (1) is a Hall sensor.

7. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 6, characterized in that: The detection end (12) comprises: an outer shell (121); an internal magnet (122), the internal magnet (122) being disposed inside the external shell (121); an iron core (123) disposed inside the internal magnet (122), one end of the iron core (123) abutting against the internal magnet (122); A coil (124) is disposed in the outer shell (121) and is wound around the iron core (123).

8. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 7, characterized in that: The end surface of the extended end of the iron core (123) interacts with the excitation system (4) in a magnetic field.

9. The signal synchronization test device and test method of the magnetoelectric sensor according to claim 8, characterized in that: The distance is the distance between the lower end surface of the sensor and the limit fixture, simulating the distance between the speed sensor, the phase sensor and the gear disc.

10. The signal synchronization testing device and testing method of the magnetoelectric sensor according to claim 9, characterized in that: Adjust the low frequency signal to simulate the phase signal synchronization function of the diesel engine which is difficult to achieve at extremely low speed.

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