A detection device for an electronic governor of a generator

Abstract

The utility model provides a kind of detection device of generator electronic speed regulator, including executor signal acquisition unit, generator working condition simulation signal generating unit, and the preset digital signal processing unit of generator mathematical model being connected between executor signal acquisition unit and generator working condition simulation signal generating unit, wherein, executor signal is obtained by photoelectric coupler isolation to executor signal acquisition unit, and it is gathered by low-pass filter circuit and schmitt trigger double circuit simultaneously, respectively, and digital signal processing unit provides analog quantity executor signal and digital quantity executor signal.The detection device of generator electronic speed regulator of the utility model is gathered executor signal by digital-analog double circuit, so that digital signal processing unit can be verified according to analog quantity executor signal and digital quantity executor signal, reduce the interference influence that single acquisition channel is susceptible to, improve the reliability of the executor signal of acquisition, and then improve the reliability and reliability of simulation test.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a detection device for an electronic speed governor of a generator. Background Technology

[0002] Electronic speed governors (ESGs) are used for generator speed control and are currently widely used in various types of generator sets to achieve stable generator output. Most current ESGs are tested using motors or generator sets. However, motors or generator sets are large, noisy during operation, and complex to operate, often requiring specialized testing workshops, resulting in high testing costs. Furthermore, the ESGs need to be transferred to these workshops after production, reducing testing efficiency.

[0003] With the development of digital technology, virtual simulation testing can be performed in existing technologies to solve the problems of high cost and low efficiency of physical testing. It obtains a virtual generator through a digital signal processor and a mathematical model of a generator. During testing, the virtual generator provides speed and load signal outputs. The electronic speed controller under test adjusts the output actuator signal according to the speed and load information corresponding to the speed and load signals. The virtual generator inputs the actuator signal output by the electronic speed controller under test into the mathematical model for processing to obtain the regulated speed and load signals, realizing closed-loop simulation of the electronic speed controller under test, and then testing the electronic speed controller under test based on the simulation data.

[0004] Among them, the control information of the actuator signal is expressed in terms of frequency and duty cycle. In order to ensure the accuracy of the acquisition of duty cycle and frequency, as well as the dynamic response performance of the test, the actuator signal is mainly acquired through digital acquisition circuit in the existing technology. However, the digital acquisition channel is easily affected by noise interference and has insufficient reliability. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a testing device for generator electronic speed governors, so as to solve the problem that the simulation test in the prior art mainly collects the actuator signal output by the electronic speed governor through the digital channel, which is easily affected by noise interference and has insufficient reliability.

[0006] This utility model provides a detection device for an electronic speed governor of a generator, comprising: an actuator signal acquisition unit, a generator operating condition simulation signal generation unit, and a digital signal processing unit with a preset generator mathematical model connected between the actuator signal acquisition unit and the generator operating condition simulation signal generation unit, wherein the actuator signal acquisition unit includes: An optocoupler, the input terminal of which is connected to the actuator signal output terminal of the electronic speed controller under test; A low-pass filter circuit is connected from the output of the optocoupler to the analog actuator signal input of the digital signal processing unit. A Schmitt trigger is connected from the output of the optocoupler to the digital actuator signal input of the digital signal processing unit.

[0007] Optionally, the digital signal processing unit is also communicatively connected to a host computer communication interface circuit.

[0008] Optionally, the digital signal processing unit is also communicatively connected to a display.

[0009] Optionally, the generator operating condition simulation signal generation unit includes a digital potentiometer circuit and a speed signal generation circuit.

[0010] Optionally, the rotational speed signal generation circuit includes at least one of a square wave generator and a sine wave generator.

[0011] The detection device for an electronic speed governor of a generator provided by this utility model includes an actuator signal acquisition unit, a generator operating condition simulation signal generation unit, and a digital signal processing unit with a preset generator mathematical model connected between the actuator signal acquisition unit and the generator operating condition simulation signal generation unit. The actuator signal acquisition unit acquires actuator signals through optical coupling isolation and simultaneously acquires them through a low-pass filter circuit and a Schmitt trigger, providing analog actuator signals and digital actuator signals to the digital signal processing unit respectively. This allows the digital signal processing unit to perform mutual verification based on the analog actuator signals and digital actuator signals, improving the reliability of the acquired actuator signals and thus enhancing the credibility of the simulation test. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the detection device for the generator electronic speed governor in an embodiment of this utility model.

[0013] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0015] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] To address the problem that existing simulation tests, which primarily acquire actuator signals from electronic speed governors via digital channels, are susceptible to noise interference and lack reliability, this invention provides a testing device for generator electronic speed governors. The device includes an actuator signal acquisition unit, a generator operating condition simulation signal generation unit, and a digital signal processing unit with a pre-set generator mathematical model connected between the actuator signal acquisition unit and the generator operating condition simulation signal generation unit. The actuator signal acquisition unit acquires actuator signals through optocoupler isolation and simultaneously acquires signals via a low-pass filter circuit and a Schmitt trigger, providing both analog and digital actuator signals to the digital signal processing unit. This allows the digital signal processing unit to perform mutual verification based on the analog and digital actuator signals, reducing the interference susceptible to single acquisition channels, improving the reliability of the acquired actuator signals, and ultimately enhancing the credibility and reliability of the simulation test.

[0018] Specifically, such as Figure 1 As shown, the detection device for the generator electronic speed governor in this embodiment uses the digital signal processing unit 10 as the virtual core of the virtual generator. It has a built-in mathematical model of the generator and can be implemented by a central processing unit or a dedicated FPGA. It inputs actuator signals and outputs generator operating condition simulation signals.

[0019] The generator operating condition simulation signals mainly include load signals characterizing the generator load characteristics and speed signals characterizing the generator speed. The actuator signal is the throttle control signal, which is used to control the throttle opening. When the load increases or the speed decreases, the electronic speed governor 100 controls the throttle to increase the opening to improve the load capacity or speed, thereby maintaining the generator's power generation stability.

[0020] The load signal can be obtained through the digital potentiometer circuit 31, and the speed signal can be obtained through the speed signal generation circuit 32. Specifically, most generator speed sensors output sine wave signals, and correspondingly, the speed signal generation circuit 32 can be selected as a sine wave generator; some generator speed sensors have built-in analog-to-digital converters, and their electronic speed governor's speed signal is a digital signal, which can be simulated by a square wave generator. Sine wave generators and square wave generators can also be configured simultaneously. When using them, the corresponding speed signal generator is selected according to the specific type of electronic speed governor being tested.

[0021] After the testing device is correctly connected to the electronic speed governor 100, the system is started. The digital signal processing unit 10 can adjust the generator operating condition simulation signal according to the preset test mode to simulate various operating conditions of the generator, detect whether the electronic speed governor 100 can correctly and effectively adjust the actuator signal, and input the actuator signal to the built-in generator mathematical model, outputting the regulated generator operating condition simulation signal to achieve closed loop, so as to obtain the performance parameters of the electronic speed governor 100 based on the test data, and realize the test. Among them, the generator mathematical model can select an appropriate existing model according to the test item. This application does not make any special limitations on the specific structure of the digital signal processing unit 10 and the built-in generator mathematical model.

[0022] To reduce the susceptibility of the digital acquisition channel to noise interference, in this embodiment, the actuator signal acquisition unit 20 includes an optocoupler 21, a low-pass filter circuit 22, and a Schmitt trigger 23. The input terminal of the optocoupler 21 is connected to the actuator signal output terminal of the electronic speed controller 100, which can isolate the acquisition of the actuator signal. The output terminal of the optocoupler 21 is connected to the input terminals of the low-pass filter circuit 22 and the Schmitt trigger 23, respectively. The analog characteristics in the actuator signal are obtained through the low-pass filter circuit 22 and provided to the analog actuator signal input terminal of the digital signal processing unit 10. The digital characteristics (including frequency and duty cycle) in the actuator signal are obtained through the Schmitt trigger 23 and provided to the digital actuator signal input terminal of the digital signal processing unit 10.

[0023] The actuator signal acquisition unit 20 can simultaneously provide analog actuator signals and digital actuator signals to the digital signal processing unit 10. On the one hand, it can provide redundancy and improve the reliability of signal acquisition; on the other hand, it can enable the digital signal processing unit 10 to perform mutual verification based on the analog and digital quantities of the actuator signals, ensuring the reliability of the control information parsed from the actuator signals; furthermore, it can be effectively acquired through the analog channel when the actuator signal is a current signal and the throttle opening is represented by the current magnitude, and through the digital channel when the actuator signal is a pulse signal and the throttle opening is represented by the pulse frequency and duty cycle.

[0024] To expand the testing range, in this embodiment, the digital signal processing unit 10 is also connected to a host computer communication interface circuit 50. It can communicate with a host computer through the host computer communication interface circuit 50 and use the resources of the host computer (computer) to simulate various operating conditions of the generator, thereby expanding the testing range.

[0025] To facilitate the acquisition of test data, in this embodiment, the digital signal processing unit 10 is also communicatively connected to a display 40, which can display test data, such as the number of pole pairs of the virtual generator, real-time speed, load, and actuator signal control information, through a graphical user interface. The display 40 can also be a touch screen display, facilitating control of the operation of the digital signal processing unit 10, including controlling the start, end, and test modes of the test. Furthermore, the acquisition channel of the actuator signal acquisition unit 20, as well as the selection of the sine wave generator and square wave generator in the speed signal generation circuit 32, can be selected according to the type of the electronic speed controller under test.

[0026] The power supply module 60 provides power to all components. The testing device is connected to the electronic speed controller 100 via a test interface (not shown in the figure). The power supply module 60 is also connected to the test interface, providing power to the electronic speed controller under test, avoiding the need for additional power supply from the electronic speed controller and improving system integration. The power supply module 60 includes, for example, a transformer, a rectifier circuit, and a voltage regulator circuit. It connects to mains power through a power port, steps down the voltage through the transformer, obtains DC power through the rectifier circuit, and then provides a stable DC operating power supply of corresponding specifications to each component through the voltage regulator circuit. The voltage regulator circuit can be, for example, a low-dropout linear regulator, which can effectively ensure power supply stability and improve the reliability of each component.

[0027] The detection device for a generator electronic speed governor provided by this utility model includes an actuator signal acquisition unit, a generator operating condition simulation signal generation unit, and a digital signal processing unit with a preset generator mathematical model connected between the actuator signal acquisition unit and the generator operating condition simulation signal generation unit. The actuator signal acquisition unit acquires actuator signals through optical coupling isolation and simultaneously acquires them through a low-pass filter circuit and a Schmitt trigger dual acquisition channel, providing analog actuator signals and digital actuator signals to the digital signal processing unit respectively. This allows the digital signal processing unit to perform mutual verification based on the analog and digital actuator signals, reducing the interference that a single acquisition channel is susceptible to, improving the reliability of the acquired actuator signals, and thus improving the credibility and reliability of the simulation test.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A detection device for an electronic speed governor of a generator, characterized in that, include: The system includes an actuator signal acquisition unit, a generator operating condition simulation signal generation unit, and a digital signal processing unit with a preset generator mathematical model connected between the actuator signal acquisition unit and the generator operating condition simulation signal generation unit. The actuator signal acquisition unit comprises: An optocoupler, the input terminal of which is connected to the actuator signal output terminal of the electronic speed controller under test; A low-pass filter circuit is connected from the output of the optocoupler to the analog actuator signal input of the digital signal processing unit. A Schmitt trigger is connected from the output of the optocoupler to the digital actuator signal input of the digital signal processing unit.

2. The detection device for the generator electronic speed governor according to claim 1, characterized in that, The digital signal processing unit is also connected to a host computer communication interface circuit.

3. The detection device for the generator electronic speed governor according to claim 1, characterized in that, The digital signal processing unit is also communicatively connected to a display.

4. The detection device for the generator electronic speed governor according to claim 1, characterized in that, The generator operating condition simulation signal generation unit includes a digital potentiometer circuit and a speed signal generation circuit.

5. The detection device for the generator electronic speed governor according to claim 4, characterized in that, The speed signal generation circuit includes at least one of a square wave generator and a sine wave generator.

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