JPH06331503A - Measurement processor for dynamometer - Google Patents

Abstract

PURPOSE:To collect control/measurement data required for analysis of the cause of abnormality positively and easily. CONSTITUTION:In the measurement processor for dynamometer, measurement and control data required for the measurement of power is collected by means of a measuring unit 11 and stored in a memory of a computor 12. A memory area is provided for each item of each data and the data is stored in time sequence, along with the time data and number data thereof, in each area. When a set area is filled with data, the data is updated starting from the oldest area. Upon occurrence of an abnormality, a data is fetched from the memory 20 and presented graphically on a CRT 8, for example, so that the variation of each data immediately before occurrence of abnormality can be outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement processing device for collecting and recording various control / measurement data when testing an automobile or the like with a dynamometer, and particularly to measurement data for assisting trouble analysis when an abnormality occurs. Processing device.

[0002]

2. Description of the Related Art A dynamometer represented by a chassis dynamometer and an engine dynamometer is shown in FIG.
The system configuration is shown in.

FIG. 1 shows an engine dynamometer,
An electric motor 2 as a power absorbing means is coupled to the test engine 1, and the control device 3 controls the supply voltage to the electric motor 2 and throttle control of the engine 1.
Perform various tests of.

For this control, various detection means for obtaining detection signals from the speed detector 4, the torque detector 5, etc. are provided, and although not shown, a power converter and an operating robot are provided.

On the other hand, a measurement processing device 6 is provided for creating test data. The measurement processing device 6 has a computer configuration and is connected to a keyboard 7 for inputting test conditions and the like, a CRT 8 for outputting test results, and a printer 9.

The measurement items of the measurement processing device 6 include speed, torque, throttle opening, various temperatures of cooling water and lubricating oil of the engine 1, and various pressures such as intake pressure. The analog or digital signal from the measuring instrument is taken in, the data is processed and displayed on the CRT 8 or the like and recorded on the printer 9 or the like.

Here, the control device 3 and the measurement processing device 6 are also provided with a protection function, and the control signal and the measurement signal are subjected to a protection operation for comparison with the limit value, and the control signal and the measurement value are out of the specified range. Occasionally, protection processing such as stopping the engine as an abnormality is performed. At the same time, various control / measurement data when an abnormality occurs is saved in the measurement processing device 6 and used as analysis data for the cause of the abnormality.

[0008]

Conventional measurement processing device 6
Can save and record various data when an abnormality occurs,
These data are control / measurement data immediately after the occurrence of an abnormality, and this data is not sufficient for analyzing the cause of the abnormality, and data until the abnormality is often required.

Although it is conceivable to save control / measurement data continuously from the start of the test, a huge amount of data can be saved for real-time processing in order to analyze an anomaly that occurs suddenly. The capacity scale of the storage device increases.

It is an object of the present invention to provide a measurement processing device which surely and easily collects control / measurement data for analysis of causes of abnormalities.

[0011]

In order to solve the above-mentioned problems, the present invention provides a dynamometer measurement processing device for collecting and recording various measurement data and control data in a power test of an automobile or an engine. Is stored with the time data or number data in the order of oldness, and when the set area is full, the memory that is saved and updated from the oldest area and the data retrieved from the memory when an error occurs are displayed and recorded in numerical values or graphs. And means.

[0012]

When the data is stored in the memory, the required memory capacity is reduced by using the rotary storage that stores only a fixed time or a fixed number of data from the current data.

When an abnormality occurs, data from a certain time before or a certain number of times before is obtained from the memory and displayed as a numerical value or a graph. As a result, the change of each data immediately before the occurrence of the abnormality, that is, the data of the process leading to the abnormality is obtained to surely and easily investigate the cause.

[0014]

FIG. 1 is a block diagram showing an embodiment of the present invention. The measurement processing system is composed of a measurement processing device including a measurement unit 11 and an industrial computer 12, and peripheral devices 7, 8, 9 and the like.

The measurement unit 11 and the computer 12 are connected by the two-port memory 13, the measurement process is distributed, and the measurement display / recording is speeded up.

Collection of various measurement data and control data by the measurement unit 11 is performed by the input units 14 to 18 for each of the analog system and the digital system, and the output unit 19 for the measurement alarm and the like is also provided.

The various data collected are stored in the computer 1.
The data is stored in the second memory 20 and further transferred to the hard disk 21, and the stored data is displayed / recorded on the CRT 8, the printer 9, the XY plotter 22 and the like.

Here, the data storage in the memory 20 of the computer 12 is a rotary storage. That is, a storage area of a certain capacity is set for each measurement item, and stored data is stored in each storage area in order from oldest to newest, and when the area is full, the oldest data is stored in order. Save and update.

By this rotary storage, the data for each measurement item is stored in the memory 20 from the present to a certain time ago or a certain number ago. Similarly, the control data is also stored in the memory 20 as needed. The data is also stored in association with time data and number data.

When the occurrence of an abnormality is detected by the protection function of the measuring unit 11 in such a data storage state, the alarm output and the test and measurement are stopped.

Thereafter, in order to investigate the cause of the abnormality, the data stored in the memory 20 is displayed on the CRT 8 or recorded in the printer 9 or the plotter 22. This display or record is made into a numerical value or a graph for each data item.

FIG. 2 shows an example of data stored in the memory 20, in which n pieces of measurement items 1 to n are stored in association with each other by time, and data from mn seconds before the occurrence of an abnormality is stored.

The display of this data on the CRT 8 is shown in FIG.
The data selected as being related to the cause of the abnormality is displayed graphically, as illustrated in FIG. In the figure, the data of the three measurement items have a horizontal axis on the time axis and zero when an abnormality occurs, and the changes up to 30 seconds before that are displayed in a graph.

A bar cursor LC that can be moved in the time axis direction is displayed on the screen for time alignment between the graphs, and the value of the intersection of this bar cursor LC and each graph is a numerical value N _{1 for} each item. , N ₂ , and N ₃ are displayed together with the item names.

Therefore, according to the present embodiment, the control / measurement data is stored and updated in the memory 20 for a predetermined time or a predetermined number of times from the present time. Various data of can be displayed and recorded on CRT8 etc.

As a result, the memory 20 can store the data immediately before the occurrence of the abnormality and provide it for display, and the memory capacity can be reduced to obtain the data display / recording for investigating the cause of the abnormality. .

Further, in the graph display, changes in data are displayed in parallel for a plurality of items, and a bar cursor is used to display values at the same time of data to facilitate association between data.

In the embodiment, the configuration of the measurement processing device is not limited to the configuration in which the measurement unit 11 and the computer 12 are separated, and the data collection format and storage format may be appropriately designed and changed.

[0029]

As described above, according to the present invention, when various measurement data and control data in a power test are stored in a memory, the data is stored in the oldest order together with its time data or number data, which is a rotary storage. When an abnormality occurs, a certain time or a certain number of data is obtained from the current data from the memory and displayed as a numerical value or graph, so the required memory capacity can be reduced, and moreover, the data of the process leading to the abnormality can be obtained. This has the effect of making it easier and more reliable to investigate the cause.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an example of data stored in a memory according to an embodiment.

FIG. 3 is an example of a CRT screen in the embodiment.

FIG. 4 is a configuration diagram of an engine dynamometer.

[Explanation of symbols]

 1 ... Test engine 2 ... Electric motor 3 ... Control device 6 ... Measurement processing device 11 ... Measurement unit 12 ... Industrial computer 20 ... Memory

Claims (1)

[Claims] 1. In a dynamometer measurement processing device for collecting and recording various measurement data and control data in a power test of an automobile or an engine, each data is stored in order of oldness together with its time data or number data and a setting area is set. A measurement processing apparatus for a dynamometer, comprising: a memory for saving and updating from the oldest area when the memory is full, and a means for displaying or recording a numerical value or a graph of data taken out from the memory when an abnormality occurs.