Static diesel engine overspeed protection detection device and method

Abstract

The present invention discloses a static diesel engine overspeed protection detection device and method. The static diesel engine overspeed protection detection device includes: a dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the self-excited oscillation module is used to generate a self-excited oscillation signal and output it to the first winding side when the switch is closed; the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; the second winding is used to output the self-excited oscillation signal to the comparison module after sensing the self-excited oscillation signal; the comparison module is used to compare the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested. In this way, the overspeed protection of the diesel engine can be detected in a static state.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine detection, and in particular to a static diesel engine overspeed protection detection device and method. Background Art

[0002] Typically, the integrity of a diesel engine's overspeed protection device can only be verified while the engine is running. Conventional overspeed protection devices are unable to verify the integrity of the entire system when the engine is stationary. If the overspeed protection device's performance cannot be determined before operation, a failure in the overspeed protection device could result in significant losses during subsequent engine operation. Therefore, it is necessary to study the performance testing of diesel engine overspeed protection when the engine is stationary. Summary of the Invention

[0003] The present invention provides a static diesel engine overspeed protection detection device and method, so as to realize the detection of diesel engine overspeed protection in a static state.

[0004] According to one aspect of the present invention, a static diesel engine overspeed protection detection device is provided, comprising: a dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; wherein the dual-winding speed measurement module comprises at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; and the switch is connected to the self-excited oscillation module;

[0005] The self-excited oscillation module is used to generate a self-excited oscillation signal and output it to the first winding side when the switch is closed; wherein the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; the second winding is used to output the self-excited oscillation signal to the comparison module after sensing the self-excited oscillation signal; the comparison module is used to compare the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested to activate the overspeed protection module to be tested.

[0006] Optionally, the static diesel engine overspeed protection detection device also includes: a first signal processing module and a first frequency division module, the first signal processing module is respectively connected to the second winding and the first frequency division module, and the first frequency division module is connected to the comparison module; the first signal processing module is used to process the self-excited oscillation signal induced and outputted by the second winding and then output it to the first frequency division module; the first frequency division module is used to perform frequency division processing on the processed self-excited oscillation signal and output a first square wave signal to the comparison module; the comparison module is also used to compare the frequency of the first square wave signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested.

[0007] Optionally, the first signal processing module includes a first signal amplifying unit and a first shaping unit; the first signal amplifying unit is connected to the second winding and the first shaping unit respectively; and the first shaping unit is connected to the first frequency dividing module.

[0008] Optionally, the static diesel engine overspeed protection detection device further includes a second signal processing module, a second frequency division module, and a display module; the second signal processing module is connected to the first winding and the second frequency division module respectively, and the second frequency division module is connected to the display module; the second signal processing module is used to process the self-excited oscillation signal of the first winding and output it to the second frequency division module; the second frequency division module is used to perform frequency division processing on the self-excited oscillation signal of the first winding and output a second square wave signal to the display module;

[0009] The display module is further connected to the self-oscillation module and the first frequency division module respectively, and is used to display the self-oscillation waveform, the first square wave signal and the second square wave signal.

[0010] Optionally, the second signal processing module includes a second signal amplifying unit and a second shaping unit; the second signal amplifying unit is connected to the first winding and the second shaping unit respectively; and the second shaping unit is connected to the display module.

[0011] Optionally, the first frequency division module and the second frequency division module are frequency dividers.

[0012] Optionally, the self-oscillation module is an oscillator.

[0013] Optionally, the dual-winding speed measurement module is a dual-winding speed measurement sensor.

[0014] Optionally, the overspeed protection module to be tested includes at least a relay and an overspeed protection solenoid valve; the relay is connected to the comparison module and the overspeed protection solenoid valve respectively, and is used to start according to the start control signal and drive the overspeed protection solenoid valve to operate so that the diesel engine can stop safely.

[0015] According to another aspect of the present invention, a static diesel engine overspeed protection detection method is provided, which is performed by the static diesel engine overspeed protection detection device described in the first aspect, wherein the static diesel engine overspeed protection detection device comprises: a dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; wherein the dual-winding speed measurement module comprises at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; and the switch is connected to the self-excited oscillation module;

[0016] The method comprises:

[0017] When the switch is closed, the self-excited oscillation module generates a self-excited oscillation signal and outputs it to the first winding side; wherein, the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; after sensing the self-excited oscillation signal, the second winding outputs the self-excited oscillation signal to the comparison module; the comparison module compares the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and outputs a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested.

[0018] The technical solution of the embodiment of the present invention provides a static diesel engine overspeed protection detection device and method, which includes: a dual-winding speed measurement module, a switch, a self-oscillation module and a comparison module; wherein the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; the switch is connected to the self-oscillation module; the self-oscillation module is used to generate a self-oscillation signal and output it to the first winding side when the switch is closed; wherein the frequency of the self-oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; the second winding is used to output the self-oscillation signal to the comparison module after sensing the self-oscillation signal; the comparison module is used to compare the frequency of the self-oscillation signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested to activate the overspeed protection module to be tested. In this way, the overspeed protection of the diesel engine can be detected in a static state to ensure the safe use of the subsequent diesel engine overspeed protection.

[0019] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a structural block diagram of a static diesel engine overspeed protection detection device provided in an embodiment of the present invention;

[0022] Figure 2 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention;

[0023] Figure 3 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention;

[0024] Figure 4 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of waveforms of various signals provided in an embodiment of the present invention;

[0026] Figure 6 The present invention provides a flow chart of a static diesel engine overspeed protection detection method. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 This is a structural block diagram of a static diesel engine overspeed protection detection device provided in an embodiment of the present invention. Figure 1 The static diesel engine overspeed protection detection device includes: a dual-winding speed measurement module 10, a switch 20, a self-oscillation module 30 and a comparison module 40; wherein the dual-winding speed measurement module 10 includes at least a first winding W1 and a second winding W2; the first winding W1 is connected to the self-oscillation module 30; the second winding W2 is connected to the comparison module 40; the comparison module 40 is connected to the overspeed protection module 50 to be tested; the switch 20 is connected to the self-oscillation module 30; the self-oscillation module 30 is used to generate a self-oscillation signal and output it to the first winding W1 side when the switch 20 is closed; wherein the frequency of the self-oscillation signal is higher than the preset frequency of the overspeed protection module 50 to be tested; the second winding W2 is used to output the self-oscillation signal to the comparison module 40 after sensing the self-oscillation signal; the comparison module 40 is used to compare the frequency of the self-oscillation signal with the preset frequency of the overspeed protection module 50 to be tested, and output a start control signal to the overspeed protection module 50 to be tested, so as to activate the overspeed protection module 50 to be tested.

[0030] The switch 20 is used to start the self-oscillation module 30 to generate a self-oscillation signal when closed. The switch 20 can be a test button.

[0031] The self-oscillation module 30 is configured to generate a self-oscillation signal having a certain frequency. The frequency of the self-oscillation signal is higher than a preset frequency of the overspeed protection module 50 to be tested. The preset frequency is the overspeed protection setting value set by the overspeed protection module 50 to be tested. The specific value can be set based on actual conditions and is not specifically limited herein.

[0032] The comparison module 40 is configured to, upon receiving the self-oscillation signal output by the second winding W2, compare the self-oscillation signal with the preset frequency of the overspeed protection module 50 to be tested. Since the frequency of the self-oscillation signal is greater than the preset frequency, the comparison module 40 outputs a start control signal to the overspeed protection module 50 to be tested. The comparison module 40 may be a comparator.

[0033] In the technical solution of this embodiment, the implementation process of the static diesel engine overspeed protection detection device is as follows: Figure 1 The first winding W1 of the dual-winding speed measurement module 10 is electrically connected to the self-oscillation module 20, the switch 20 is electrically connected to the self-oscillation module 30, the second winding W2 is electrically connected to the comparison module 40, and the comparison module 40 is electrically connected to the overspeed protection module 50 to be tested. When static testing of the diesel engine overspeed protection is required, the switch 20 is closed. After the switch 20 is closed, the self-oscillation module 30 generates a self-oscillation signal and outputs it to the first winding W1. The first winding W1 induces the self-oscillation signal to the second winding W2 through electromagnetic induction. The second winding W2 senses the self-oscillation signal and outputs it to the comparison module 40. Comparison module 40 compares the frequency of the self-oscillation signal output by second winding W2 with the preset frequency of overspeed protection module 50 to be tested. Because the frequency of the self-oscillation signal is greater than the preset frequency of overspeed protection module 50 to be tested, comparison module 40 outputs a start control signal to overspeed protection module 50 to be tested, thereby activating overspeed protection module 50 to safely stop the diesel engine. This simulates the correct operation of the entire overspeed protection device while the diesel engine is stationary, enabling testing of the diesel engine's overspeed protection in a static state. This verifies the integrity of the entire overspeed protection system, thereby ensuring the safe use of subsequent diesel engine overspeed protection.

[0034] The technical solution of this embodiment provides a static diesel engine overspeed protection detection device, which includes: a dual-winding speed measurement module, a switch, a self-oscillation module and a comparison module; wherein the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; the switch is connected to the self-oscillation module; the self-oscillation module is used to generate a self-oscillation signal and output it to the first winding side when the switch is closed; wherein the frequency of the self-oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; the second winding is used to output the self-oscillation signal to the comparison module after sensing the self-oscillation signal; the comparison module is used to compare the frequency of the self-oscillation signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested to activate the overspeed protection module to be tested. In this way, the overspeed protection of the diesel engine can be detected in a static state to ensure the safe use of the subsequent diesel engine overspeed protection.

[0035] Figure 2 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention. As an embodiment, optionally, refer to Figure 2 The static diesel engine overspeed protection detection device also includes: a first signal processing module 60 and a first frequency division module 70. The first signal processing module 60 is connected to the second winding W2 and the first frequency division module 70 respectively, and the first frequency division module 70 is connected to the comparison module 40; the first signal processing module 60 is used to process the self-excited oscillation signal induced and output by the second winding W2 and output it to the first frequency division module 70; the first frequency division module 70 is used to perform frequency division processing on the processed self-excited oscillation signal and output a first square wave signal to the comparison module 40; the comparison module 40 is also used to compare the frequency of the first square wave signal with the preset frequency of the overspeed protection module to be tested 50, and output a start control signal to the overspeed protection module to be tested 50, so as to activate the overspeed protection module to be tested 50.

[0036] The first signal processing module 60 processes the self-oscillation signal induced and output by the second winding W2, which may include amplification and shaping, etc. The specific settings can be made according to actual conditions and are not specifically limited here.

[0037] The frequency of the first square wave signal is greater than the preset frequency of the overspeed protection module 50 to be tested.

[0038] Optionally, continue to refer to Figure 2The overspeed protection module 50 to be tested includes at least a relay 51 and an overspeed protection solenoid valve 52; the relay 51 is connected to the comparison module 40 and the overspeed protection solenoid valve 52 respectively, and is used to start according to the start control signal and drive the overspeed protection solenoid valve 52 to operate so that the diesel engine can stop safely.

[0039] Among them, after receiving the first square wave signal, the comparison module 40 compares the frequency of the first square wave signal with the preset frequency of the overspeed protection module 50 to be tested. Since the frequency of the first square wave signal is greater than the preset frequency of the overspeed protection module 50 to be tested, the comparison module 40 outputs a start control signal to the relay 51. The relay 51 is started according to the start control signal and drives the overspeed protection solenoid valve 52 to operate. The overspeed protection solenoid valve 52 is activated to stop the diesel engine safely.

[0040] Figure 3 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention. As an embodiment, optionally, refer to Figure 3 The static diesel engine overspeed protection detection device also includes a second signal processing module 80, a second frequency division module 90 and a display module 100; the second signal processing module 80 is respectively connected to the first winding W1 and the second frequency division module 90, and the second frequency division module 90 is connected to the display module 100; the second signal processing module 80 is used to process the self-excited oscillation signal of the first winding W1 and output it to the second frequency division module 90; the second frequency division module 90 is used to divide the self-excited oscillation signal of the first winding W1 and output a second square wave signal to the display module 100; the display module 100 is also respectively connected to the self-excited oscillation module 30 and the first frequency division module 70, and is used to display the self-excited oscillation waveform, the first square wave signal and the second square wave signal.

[0041] The frequency of the second square wave signal is greater than the preset frequency of the overspeed protection module 50 to be tested.

[0042] Among them, by setting up a second signal processing module 80, a second frequency division module 90 and a display module 100, the self-excited oscillation signal generated by the self-excited oscillation module 30 is sequentially processed by data processing (i.e., processed by the second signal processing module) and frequency division processing (i.e., processed by the second frequency division module) and then outputted as a second square wave signal to the display module 100 for display, and the self-excited oscillation signal sensed by the second winding W2 is sequentially processed by data processing (i.e., processed by the first signal processing module) and frequency division processing (i.e., processed by the first frequency division module) and then outputted as a first square wave signal to the display module 100 for display, thereby enabling the two groups of square wave signals to be compared to ensure that the signal sensed by the second winding W2 is the same as the signal generated by the self-excited oscillation module 30, thereby verifying the accuracy of the signal to be compared by the comparison module 40, thereby further ensuring the accuracy of the diesel engine overspeed protection detection.

[0043] Optionally, the first frequency division module and the second frequency division module are frequency dividers.

[0044] The specific selection of the frequency divider can be set according to actual conditions and is not specifically limited here.

[0045] Figure 4 This is a structural block diagram of another static diesel engine overspeed protection detection device provided in an embodiment of the present invention. As a specific implementation method, optionally, refer to Figure 4 The first signal processing module includes a first signal amplifying unit 61 and a first shaping unit 62 ; the first signal amplifying unit 61 is connected to the second winding W2 and the first shaping unit 62 respectively; the first shaping unit 62 is connected to the first frequency dividing module 70 .

[0046] The first signal amplifying unit 61 may be a signal amplifier, and the first shaping unit 62 may be a shaping circuit.

[0047] Continue to refer Figure 4 The second signal processing module includes a second signal amplifying unit 81 and a second shaping unit 82 ; the second signal amplifying unit 81 is connected to the first winding W1 and the second shaping unit 82 , respectively; and the second shaping unit 82 is connected to the display module 100 .

[0048] The second signal amplifying unit 81 may be a signal amplifier, and the second shaping unit 82 may be a shaping circuit.

[0049] Optionally, the self-oscillation module is an oscillator.

[0050] The specific selection of the oscillator can be set according to actual conditions and is not specifically limited here.

[0051] Optionally, the dual-winding speed measurement module is a dual-winding speed measurement sensor.

[0052] Figure 5 Schematic diagram of the waveforms of various signals provided in the embodiment of the present invention. Figure 5 The self-oscillation signal generated by the self-oscillation module is shown as M2. The self-oscillation signal of the first winding W1 or the self-oscillation signal output by the self-oscillation module is processed by the second signal processing module and divided by the second frequency division module, and then output as a second square wave signal, as shown in M1. The self-oscillation signal sensed by the second winding W1 from the first winding W1 is processed by the first signal processing module and divided by the first frequency division module, and then output as a first square wave signal, as shown in M3.

[0053] In the technical solution of this embodiment, the implementation process of the static diesel engine overspeed protection detection device is: combined with Figure 4 and Figure 5 The first winding W1 of the dual-winding speed measurement module 10 is electrically connected to the self-oscillation module 20, the switch 20 is electrically connected to the self-oscillation module 30, the second winding W2 is electrically connected to the first signal amplification unit 61, the first signal amplification unit 61 is electrically connected to the first shaping unit 62, the first shaping unit 62 is electrically connected to the first frequency division module 70, the comparison module 40 is electrically connected to the first frequency division module and the relay 51, and the relay 51 is electrically connected to the overspeed solenoid valve 52. In addition, the self-oscillation module 30 and the first winding W1 are electrically connected to the second signal amplification unit 81, the second signal amplification unit 81 is electrically connected to the second shaping unit 82, and the second frequency division module 90 is electrically connected to the second shaping unit 82 and the display module 100. When static testing of the diesel engine overspeed protection is required, switch 20 is closed. After switch 20 is closed, the self-oscillation module 30 generates a self-oscillation signal and outputs it to the first winding W1 and the second signal amplification unit 81, respectively. The first winding W1 induces the self-oscillation signal to the second winding W2 through electromagnetic induction. The second winding W2 then senses the self-oscillation signal and outputs it to the first signal amplification unit 61. After amplification, the signal is output to the first shaping unit 62 for shaping, and then to the first frequency division module 70. After frequency division by the first frequency division module 70, the signal is output as a first square wave signal to the comparison module 40. The comparison module 40 compares the frequency of the first square wave signal with the preset frequency of the overspeed protection module 50 to be tested. Since the frequency of the first square wave signal is greater than the preset frequency of the overspeed protection module 50 to be tested, the comparison module 40 outputs a start control signal to the relay 51. The relay 51 is activated and activates the overspeed solenoid valve, which activates the overspeed solenoid valve 52, safely stopping the diesel engine. In this way, the correct operation of the entire overspeed protection device can be simulated when the diesel engine is stationary, and the overspeed protection of the diesel engine can be tested in a static state, thereby verifying the integrity of the entire overspeed protection system, thereby ensuring the safe use of the subsequent diesel engine overspeed protection. In addition, the second signal amplification unit 81 amplifies the self-excited oscillation signal and outputs it to the second shaping unit 82. After being shaped by the second shaping unit 82, it is output to the second frequency division module 90. After frequency division by the second frequency division module 90, it outputs a second square wave signal to the display module 100. Therefore, the tester can intuitively observe and compare the waveform changes of each signal through the display module 100, thereby ensuring the accuracy and effectiveness of the signal input to the comparison module, thereby further ensuring the accuracy of the diesel engine overspeed protection detection.

[0054] Figure 6It is a flow chart of a static diesel engine overspeed protection detection method provided in an embodiment of the present invention. An embodiment of the present invention also provides a static diesel engine overspeed protection detection method, which is executed by a static diesel engine overspeed protection detection device provided by any embodiment of the present invention, and the static diesel engine overspeed protection detection device includes: a dual-winding speed measurement module, a switch, a self-excited oscillation module and a comparison module; wherein, the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; and the switch is connected to the self-excited oscillation module. Reference Figure 6 , the method comprises the following steps:

[0055] S110 , when the switch is closed, the self-oscillation module generates a self-oscillation signal and outputs it to the first winding side.

[0056] The frequency of the self-oscillation signal is higher than the preset frequency of the overspeed protection module to be tested.

[0057] The switch is electrically connected to the self-oscillation module, which is in turn electrically connected to the first winding of the dual-winding speed measurement module. When static mode overspeed protection is required for the diesel engine, the switch is closed. After the switch is closed, the self-oscillation module generates a self-oscillation signal and outputs it to the first winding. The self-oscillation module can be an oscillator.

[0058] S120 , after sensing the self-oscillation signal, the second winding outputs the self-oscillation signal to the comparison module.

[0059] The second winding is electrically connected to the comparison module. After the second winding senses the self-excited oscillation signal on the first winding side according to electromagnetic induction, it outputs the signal to the comparison module. The comparison module may be a comparator.

[0060] S130 , the comparison module compares the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and outputs a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested.

[0061] The frequency of the self-oscillation signal generated by the self-oscillation module is greater than a preset frequency. Therefore, upon receiving the self-oscillation signal sensed by the second winding, the comparison module compares its frequency with the preset frequency of the overspeed protection module under test and outputs an activation control signal to the overspeed protection module under test. The overspeed protection module under test initiates an action based on the activation control signal, safely shutting down the diesel engine.

[0062] The technical solution of this embodiment provides a static diesel engine overspeed protection detection method, which is performed by the static diesel engine overspeed protection detection device provided by any embodiment of the present invention. The static diesel engine overspeed protection detection device includes: a dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; wherein the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; and the switch is connected to the self-excited oscillation module. The method includes: when the switch is closed, the self-excited oscillation module generates a self-excited oscillation signal and outputs it to the first winding side; wherein the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; after the second winding senses the self-excited oscillation signal, it outputs the self-excited oscillation signal to the comparison module; the comparison module compares the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and outputs a start control signal to the overspeed protection module to be tested to activate the overspeed protection module to be tested. In this way, the overspeed protection of the diesel engine can be detected in a static state to ensure the safe use of the subsequent overspeed protection of the diesel engine.

[0063] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0064] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A static diesel engine overspeed protection detection device, characterized in that: include: A dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; wherein the dual-winding speed measurement module includes at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be measured; and the switch is connected to the self-excited oscillation module; The self-excited oscillation module is used to generate a self-excited oscillation signal and output it to the first winding side when the switch is closed; wherein the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; the second winding is used to output the self-excited oscillation signal to the comparison module after sensing the self-excited oscillation signal; the comparison module is used to compare the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested; The static diesel engine overspeed protection detection device also includes: a first signal processing module and a first frequency division module, the first signal processing module is connected to the second winding and the first frequency division module respectively, and the first frequency division module is connected to the comparison module; the first signal processing module is used to process the self-excited oscillation signal induced and outputted by the second winding and output it to the first frequency division module; the first frequency division module is used to perform frequency division processing on the processed self-excited oscillation signal and output a first square wave signal to the comparison module; the comparison module is also used to compare the frequency of the first square wave signal with the preset frequency of the overspeed protection module to be tested, and output a start control signal to the overspeed protection module to be tested to activate the overspeed protection module to be tested.

2. The static diesel engine overspeed protection detection device according to claim 1, characterized in that: The first signal processing module includes a first signal amplifying unit and a first shaping unit; the first signal amplifying unit is connected to the second winding and the first shaping unit respectively; the first shaping unit is connected to the first frequency dividing module.

3. The static diesel engine overspeed protection detection device according to claim 1, characterized in that: It also includes a second signal processing module, a second frequency division module and a display module; the second signal processing module is connected to the first winding and the second frequency division module respectively, and the second frequency division module is connected to the display module; the second signal processing module is used to process the self-excited oscillation signal of the first winding and output it to the second frequency division module; the second frequency division module is used to perform frequency division processing on the self-excited oscillation signal of the first winding and output a second square wave signal to the display module; The display module is further connected to the self-oscillation module and the first frequency division module respectively, and is used to display the self-oscillation waveform, the first square wave signal and the second square wave signal.

4. The static diesel engine overspeed protection detection device according to claim 3, characterized in that: The second signal processing module includes a second signal amplifying unit and a second shaping unit; the second signal amplifying unit is connected to the first winding and the second shaping unit respectively; and the second shaping unit is connected to the display module.

5. The static diesel engine overspeed protection detection device according to claim 3, characterized in that: The first frequency division module and the second frequency division module are frequency dividers.

6. The static diesel engine overspeed protection detection device according to claim 1, characterized in that: The self-excited oscillation module is an oscillator.

7. The static diesel engine overspeed protection detection device according to claim 1, characterized in that: The dual-winding speed measurement module is a dual-winding speed measurement sensor.

8. The static diesel engine overspeed protection detection device according to claim 1, characterized in that: The overspeed protection module to be tested includes at least a relay and an overspeed protection solenoid valve; the relay is connected to the comparison module and the overspeed protection solenoid valve respectively, and is used to start according to the start control signal and drive the overspeed protection solenoid valve to operate so that the diesel engine can stop safely.

9. A static diesel engine overspeed protection detection method, characterized in that: The static diesel engine overspeed protection detection device according to any one of claims 1 to 8 is implemented, and the static diesel engine overspeed protection detection device comprises: a dual-winding speed measurement module, a switch, a self-excited oscillation module, and a comparison module; wherein the dual-winding speed measurement module comprises at least a first winding and a second winding; the first winding is connected to the self-excited oscillation module; the second winding is connected to the comparison module; the comparison module is connected to the overspeed protection module to be tested; and the switch is connected to the self-excited oscillation module; The method comprises: When the switch is closed, the self-excited oscillation module generates a self-excited oscillation signal and outputs it to the first winding side; wherein, the frequency of the self-excited oscillation signal is higher than the preset frequency of the overspeed protection module to be tested; after sensing the self-excited oscillation signal, the second winding outputs the self-excited oscillation signal to the comparison module; the comparison module compares the frequency of the self-excited oscillation signal with the preset frequency of the overspeed protection module to be tested, and outputs a start control signal to the overspeed protection module to be tested, so as to activate the overspeed protection module to be tested.

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