JPS61104263A - Automatic inspection apparatus of number-of-rotation detection apparatus - Google Patents

Abstract

PURPOSE:To attain to prevent starting impossibility or an accident, by detecting the power quantity of a generator other than the number of rotations of drive machinery and calculating the number of rotations at the time of non-load from these data while comparing this value with the preceding one to detect the abnormality of the rotation detection means of the drive machinery. CONSTITUTION:The operation of an engine 1 is started and automatic inspecting operation is started by the output of an operational state detection apparatus 23. An operation control apparatus 26 reads the number N of rotations of the engine 1 and the power quantity W of a generator 3 from a number-of-rotation detection apparatus 21 and a power quantity detection apparatus 22 through an input apparatus 24. Next, by applying correction processing to the number N of rotations of the engine 1 on the basis of power quantity W by the operation control apparatus 26, the number NR of rotations at the time of non-load is operated and compared with the number NRA of average rotations at the time of non-load up to the preceding time stored in a memory apparatus 25 and the deterioration in the capacity of the number-of- rotation detection apparatus 21 is judged on the basis of whether the change rate of both numbers of rotations is a definie value or more and, if said apparatus 21 is judged to be abnormal, abnormality is displayed on a display apparatus 28.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic inspection device for a rotation speed detection device, and in particular, the present invention relates to an automatic inspection device for a rotation speed detection device. This relates to something that can quickly tell if the vehicle is falling into a state of overdrive.

[Conventional technology]

FIG. 6 is a block connection diagram showing a conventional rotation control device for driving equipment. In FIG.

2 is a speed reducer, 3 is a generator, 4 is a rotational speed detector for engine 1, 5 is a rotational speed controller for engine 1, 6 is a fuel valve that controls the amount of fuel supplied to engine 1, and T is a rotational speed detector. This is a rotation speed meter of engine 1 connected to engine 5.

Let me briefly explain the operation. A signal proportional to the rotational speed of the engine 1 detected by the rotational speed detector 4 and a contact output are outputted to the rotational speed anti-control cape 5 at the set engine rotational speed, and according to these signals, The fuel valve 6 is controlled to control the rotational speed of the engine 1. The controller 8 of such a gas turbine engine detects the rotation speed in the entire rotation range from start to stop.

The starter, auxiliary equipment, and fuel valve are continuously controlled at or above the set rotation speed. Also, while a diesel engine rotates at several thousand revolutions per minute, a gas engine engine rotates at a high speed of only a few thousand revolutions per minute. In order to increase the rotation speed from f to maximum within one minute, precise control of the rotation speed of the engine 1 is required, especially during startup.

[Problem that the invention seeks to solve]

By the way, in order to control the rotation speed of the engine 1, it is necessary to detect the rotation speed of the engine 1 with high precision, and a rotation speed detection device including the rotation speed detector 4 and the rotation speed controller 5 is required. If the engine malfunctions and the performance deteriorates, it may become impossible to start engine 1 or detect overspeed, and there is a risk that engine 1 may be damaged due to rotation beyond the high-speed operating range, which could lead to a fatal accident.72.0 In other words, there was no guarantee that the rotation control of the engine 1 could always be executed stably.

Recently, gas turbine engines have been increasingly used as emergency generator drive equipment, but since there is little experience, improvements in reliability are desired for their widespread use. In addition, this fl'! Since there was no reliable emergency generator drive equipment, it was necessary to visually check the temperature meter and revolution speed meter to determine the failure of the one-rotation detection device.

This invention was made in order to eliminate the problems of the conventional ones as described above, and it calculates the current no-load rotation speed from the rotation speed of moving equipment such as the engine and the electric power of the generator.
Therefore, compare this no-load rotation speed with the average value of the previous no-load rotation speeds in the same manner as above, and when the comparison error exceeds the set value, the number of times it exceeds the set value is set. To provide an automatic inspection device for a rotation speed detection device in a motor vehicle, which automatically reports an abnormality in the rotation speed detection device at an initial stage by displaying an abnormality display when the rotation speed detection device exceeds the number of times.

[Means for Solving Node Point 7] The automatic inspection device for the rotation speed detection device according to the present invention includes a rotation speed detection device for detecting the rotation speed of the driving equipment and a power amount for detecting the power amount of the generator. With detection device.

A drive detection device that detects the five motion states of the drive equipment, and a comparison value of the no-load rotation speed obtained by correcting the above-mentioned rotation speed with the above-mentioned electric energy and the no-load average rotation speed at the previous time. A control device that calculates the number of occurrences of a rate of change greater than a certain value in a hole of size, and a control device that calculates the number of times a rate of change greater than a certain value has occurred exceeds a set value. It is equipped with a display device that displays .

[Effect]

In this invention, each detection device reads the rotational speed of the drive device and the amount of electric power of the generator while the small moving device is in operation, and furthermore, the rotational speed and the above-mentioned electric power are stored in the arithmetic and control device. After settling down, the above rotation speed is corrected and calculated using the above electric energy to obtain the no-load rotation speed, and this no-load rotation speed and the average no-load rotation speed up to the previous time are stored in the storage device in advance. Calculate the magnitude of the rate of change or the number of times that the rate of change occurs over a certain value, and when the rate of change or the number of times exceeds the set value, it is determined that the rotation speed detection device of the moving equipment is abnormal. Then, the display device displays the seven abnormalities with sound and sound, and operates as instructed by the operator.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In Figure 2, 8 is a transformer connected to the generator 3, 9
10 is the current transformer, 11 is the rx power converter, 12 is the power converter 1.
This is an automatic inspection circuit that performs calculations based on the electric power W which is the output of the engine 1 and the rotational value of the engine 1 which is the output of the rotational speed controller 5. Note that the same reference numerals are given to the obtained parts that are the same as those shown in FIG. 6, and redundant explanation thereof will be omitted.

Further, the automatic inspection circuit 12 is configured as shown in FIG. 2) is a rotation speed detection device for detecting the rotation speed of the engine 1 as a driving device,
It is equipped with a rotation speed detector 4, a rotation speed controller 5, and the like. 22 is a power amount detection device that detects the power amount of the generator, and includes a power amount converter 11 and the like. 23 is an operating state detection device as an overtime detection device for detecting the operating state of the engine 1, and 24 is each detection device! 2) Input device that inputs the detected data of 22.23 into the arithmetic control device and converts it into a signal that can be subjected to logical judgment and arithmetic processing. A storage device that stores various data such as programs, input data, and calculation results.

26, a y4 arithmetic control device that receives data from the input device 24 according to the contents of the program stored in the storage device 25, executes logical judgments and calculations, and outputs the results to the storage device 25 and the output device; 27 is an output device that converts the calculation result into a signal that can be output to an external display device 28, auxiliary relay 29, etc.

In the arrow, I will talk about b-crop. This operation will be explained with reference to the flowchart of the inspection process shown in FIG.

(a) First, when the engine 1 starts operating and enters the operating state, an automatic inspection operation is started based on the output of the operating state detection device 23.

(b) With the start of this automatic inspection operation, the rotation speed N of the engine 1 and the electric power amount W of the generator 3 are transmitted to the arithmetic and control device 26 through the input device 24 from the rotation speed detection device 2) and the electric power amount detection device 22. Read it completely.

(C) In the example shown in FIG. 2, the number of revolutions N of the engine 1 is corrected by the amount of electric power W, so that the number of revolutions NR under no load is set to y4, and in the same manner as in this method. Compare this with the previous no-load average rotation speed NBA stored in advance in the IT device 25.
A processing judgment is made as to whether or not the rate of change of both rotational speeds is larger than a certain value, or whether the rate of change of the -leg one shift or more has occurred a predetermined number of times or more. In other words, each time the engine 1 is started, the current no-load rotation speed NP and the previous no-load average rotation speed NPA are softened as shown in FIG. , the number of times the rate of change α occurs is 1,000, and its magnitude f7t can be determined by calculating whether the number of times is equal to or greater than a certain value.

The relationship between the electric energy W and the rotational speed N is as shown in Figure 5. At 100% load, the rotational speed is 100cm, but at no load, the rotational speed is 103% due to the drooping characteristics. Therefore, it is necessary to determine the above NR in consideration of this relationship.

(d) Thus, the magnitude of the rate of change α or the rate of change α
When the number of times that occurs exceeds a certain IA, the one-rotation speed detection device 1L2) determines that there is an abnormality due to attention saving. In other words, the presence or absence of an abnormality is determined.

(e) If there is an abnormality, the abnormality data is output to the outside.The abnormality is also displayed with sound on the display device 28, and the fA inspection process is completed.

(fJ-10,000, abnormality takes n) waits for a long data reading cycle, and when the reading cycle comes, repeats the operations from step b of data reading.

(b) On the other hand, if the reading cycle is not long enough, it is determined whether the engine 1 is running or not.

(h) If it is determined that it is not in operation in step g, then n
, y4 calculation control device 26 outputs a signal indicating that the inspection result is normal to display device 28.

(i) If the inspection result is found to be normal, multiply the average rotation speed at no-load up to now by Keep it available.

In this way, from the rotation speed of the engine as a driving device and the electric energy of the generator 3, the no-load rotation speed and the previous no-load average rotation speed are compared, and both of them are calculated. When the magnitude of the rate of change (error) in rotational speed or the number of occurrences of a rate of change over a certain value exceeds the setting 11, an error message is displayed.
Have the operator inspect, inspect, or replace the rotational speed detector.

This will help prevent the occurrence of serious emergencies.

In addition, in the above embodiment, the magnitude of the change rate between the no-load rotation speed of the engine 1 per set time and the previous no-load average rotation speed or the number of times that the change rate is greater than or equal to one step is calculated by S. In this way, an abnormality in the engine can be detected.In addition, the rate of change between the engine no-load rotation speed and the previous average no-load rotation speed for each fixed period is determined by If a device is installed to type out the number of times the rate of change is greater than a certain value, it is possible to obtain data for reviewing the rate of change or the number of times the rate of change occurs. Further, although the emergency gas turbine engine generator was described in the above embodiment, the present invention can be applied to detect abnormalities in rotation speed detection devices in drive equipment including all types of engines.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to drive an engine, etc.
In addition to the rotation speed of the generator, the amount of electricity of the generator is detected, and this
Rather than detecting an abnormality in the rotation detection means of the drive equipment at the initial stage of driving the drive equipment, based on the result of comparing the no-load rotation speed determined from two detection data with the previous no-load average rotation speed. With this configuration, it is possible to prevent in advance a fatal accident such as damage to each part of the drive device or the control section due to the inability to start the drive device or the inability to detect overspeed.

[Brief explanation of drawings]

Fig. 1 is a block connection diagram of an automatic Q-detection circuit according to an example of the present invention, Fig. 2 is a block connection diagram schematically showing the rotation speed inspection device of the present invention, and Fig. 3 is a block connection diagram of an automatic inspection circuit according to an example of the present invention. Flowchart showing the processing process, Fig. 4 is a graph showing the relationship between the number of engine starts and the average engine rotation speed, Fig. 5 is a graph showing the relationship between the electric power amount of the generating tank and the rotation speed, and Fig. 6 1 is a block diagram showing a conventional engine rotation control device; FIG. 1 drive equipment, 3 generator, 2) rotation speed detection device, 2
2U rotation number detection device, 23 stile drive detection device (driving state detection device), 26 calculation control @I device, 28 display device. Note that the same reference numerals in the figures indicate the same or corresponding parts. Special applicant Mitsubishi Deniso Co., Ltd. 4E Figure 6 Procedural amendment (voluntary) 2. Name of the invention Automatic inspection device for rotational speed detection device' 3. Relationship with the case of the person making the amendment Patent applicant address Tokyo 2-2-3 Marunouchi, Chiyoda-ku Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent Postal code 105 Address
4-4-10-5 Nishi-Shinbashi, Minato-ku, Tokyo, Subject of amendment (1) Claims column of the specification t
6. Contents of the amendment (The scope of the 1149 claims is amended as shown in the attached sheet. The specification is corrected as follows. (3) The component symbols in Figure 1 are amended as shown in the attached sheet. 7. The attached ministries Catalog (1) One document stating the amended scope of patent claims (
2) One or more documents stating the amended Figure 1. Claims after the amendment: (1) A rotation speed detection device installed in a rotation control system of a drive device to detect the rotation speed; a power amount detection device that detects the power amount of the driven generator; a drive detection device that detects the driving state of the drive device; and a power amount detection device that detects the power amount of the driven generator, and corrects the rotation speed by the power amount while the drive device is being driven. Determine the current constant load conditions of the drive equipment, such as the no-load rotation speed, and compare this no-load rotation speed with the previous no-load average rotation speed to determine the rate of change in these comparison values. an arithmetic and control device that calculates the number of consecutive times that the rate of change is greater than or equal to a certain value; , an automatic inspection device for a rotation speed detection device, comprising a display device that displays an abnormality based on the output of the arithmetic and control device. The first aspect of the present invention is characterized in that the average number of rotations during no-load up to the last rotation is output and recorded at regular intervals.
Automatic inspection device for the rotation speed detection device described in Section 1. Figure 1

Claims (2)

[Claims] (1) A rotation speed detection device that is installed in a rotation control system of a drive device and detects the rotation speed, a power amount detection device that detects the amount of power of a generator driven by the drive device, and a drive of the drive device. A drive detection device that detects the state, and while the drive device is in operation, calculate the current no-load rotation speed of the drive device by correcting the rotation speed with the above electric energy, and calculate the no-load rotation speed and the previous rotation speed. an arithmetic and control device that calculates the magnitude of the rate of change of these comparison values or the number of times the rate of change continues to be above a certain value by comparing the average rotational speed at no-load with the average rotation speed at no-load; An automatic inspection device for a rotational speed detecting device, comprising: a display device that displays an abnormality based on the output of the arithmetic and control device when the rate of change exceeds a certain value or when the number of continuations of a rate of change above a certain value exceeds a certain number of times. (2) The rotation speed detection device according to claim 1, characterized in that the no-load rotation speed of the drive equipment and the previous no-load average rotation speed are compared at regular intervals. automatic inspection equipment.