JPH0458017A - Abnormality monitor of diesel engine - Google Patents

Abstract

PURPOSE:To facilitate attaching of a sensor and to reduce its cost as a whole by providing a detection means which detects characteristics of gas such as component, concentration, etc., of exhaust gas and a discrimination means which discriminates each kind of abnormality of an engine from the output pattern of the gas detection means. CONSTITUTION:A signal conversion means 2 converts an output signal of a gas detection means 1 into a signal pattern by which a discrimination processing means 3 can be handled. The discrimination means 3 creates a pattern by means of a signal from the gas detection means 1, defects exhaust gas of a diesel engine 100 by the gas detection means 1, takes an output value corresponding to the component or concentration of the exhaust gas into the discrimination processing means 3 by the signal changeover means 2, creates the pattern of a present value, and discriminates whether the present value is any abnormal pattern or not by comparing it with the standard pattern to perform monitor of abnormality. A sensor itself of a signal processor itself is made cheap together with easiness of assembling work.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to industrial diesel engines.

[Prior Art] Diesel engines are also widely used in fields that require extremely high reliability, such as pump plants, ships, and emergency power drives. Therefore, it is most important to detect the abnormality as early as possible before it leads to failure.

For this reason, conventionally, various sensors such as temperature, vibration, and sound sensors have been attached to the engine to detect abnormalities. Figure 3 shows an example of a temperature-based monitoring device. In this case, in order to monitor a 6-cylinder engine, it is necessary to install a temperature sensor on each cylinder, which requires time and effort to install at least 6 locations, and a wire from each sensor to the signal conditioner. It will be necessary to route the

[Problems to be Solved by the Invention] However, problems caused by temperature, vibration, sound, etc. have the drawbacks that the sensor body, sensor signal processing circuit, etc. are expensive, and mounting the sensor to the engine body is troublesome. was there.

An object of the present invention is to solve the problems of the conventional device.

It is an object of the present invention to provide a diesel engine abnormality monitoring device in which the sensor itself or the signal processing device itself is inexpensive and the assembly work of the device is easy.

[Means to solve the problem]

The abnormality monitoring device for a diesel engine according to the present invention includes one or more detection means having different characteristics for detecting gas characteristics such as components and concentration of exhaust gas, and a signal for converting the output of the gas detection means into a signal that can be identified and processed. It is characterized by comprising a converting means and an identifying means for identifying each abnormality of the engine from the output pattern of the gas detecting means.

[Operation 1: Exhaust gas from a diesel engine is detected by a gas detection means. Each of these detection means outputs output values according to the components and concentration of the exhaust gas, so these values are taken into the identification processing means by the signal conversion means, a pattern of current values is generated, and it is determined whether the pattern value is an abnormal pattern or not. Abnormality monitoring is performed by identifying whether the

[Example] An example of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows an example of an embodiment, in which 100 is a diesel engine to be monitored for an abnormality, and 1 is a gas detection means, which guides the exhaust gas of the diesel engine to the gas detection means by a vibrator or from the exhaust stack. A gas detection means is installed directly inside. The gas detection means includes a semiconductor gas sensor and the like. Reference numeral 2 denotes a signal converting means which converts the output signal of the gas detection means into a signal form by handling it with the identification processing means 3.

Specifically, there is an A/D converter. 3 is an identification means that generates a pattern based on the signal from the gas detection means 1, and compares it with a pre-registered pattern indicating an abnormality in the engine to determine the type of abnormality. The results are displayed on, for example, 4 display means, such as a CRT. The identification processing method in step 3 may be any method that can compare the registered pattern and the measured pattern, such as a method of calculating the distance from the registered value by checking the pattern's Bertol value, or a method of learning by neutral work. There are ways to identify the

Next, the operation of the above embodiment will be explained.

The gas detected by the diesel engine is detected by the gas detection means, and the output values according to the exhaust gas components or concentrations by these detection means are taken into the identification processing means by the signal conversion means, a pattern of current values is generated, and the pattern value is It compares it with a reference pattern to identify whether it is an abnormal pattern and performs abnormality monitoring.

FIG. 2 shows an example of a processing flowchart when processing as a Peltle value.

〔Effect of the invention〕

Since the diesel engine abnormality monitoring device of the present invention uses exhaust gas, there is no need to install the sensor on the diesel engine itself, making it easy to install, and the sensor or signal processing device itself is cheaper than conventional ones. , there is an advantage that the device can be constructed at low cost overall.

[Brief explanation of drawings]

1 and 2 are related to the present invention; FIG. 1 is a configuration diagram of a monitoring device according to a first embodiment, FIG. 2 is a processing flowchart of the identification processing means, and FIG. 3 is a configuration of a conventional monitoring device. It is a diagram. Mechanism... Gas detection means, 2... Signal conversion means, 3... Identification processing means, 4...
...Display means, lO...Temperature sensor, 11...
...Signal condition 9100...Diesel engine. Figure 2 Ward C Castle

Claims (1)

[Claims] A gas detection means having one or more different characteristics for detecting gas characteristics such as components and concentration of exhaust gas, a signal conversion means for converting the output of the gas detection means into a signal that can be identified and processed, and a gas detection means for detecting each abnormality in the engine. 1. An abnormality monitoring device for a diesel engine, comprising an identification means for identifying based on an output pattern of the detection means.