JP3418057B2 - Measurement system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring system, for example, an engine measuring system that performs various data processing by measuring and controlling performance tests and durability tests of a bench engine.

[0002]

2. Description of the Related Art A conventional engine measuring system is shown in FIG. In FIG. 4, one or two large racks R each having a width of 19 inches, for example, are set up in the measurement room M, and measuring instruments 1, 2, and 3 for pressure, temperature, voltage, etc. are installed in the engine room (laboratory) L. It is incorporated corresponding to various sensors S installed in the engine E placed inside. For example, measuring instrument 1
Is a pressure measuring instrument, the measuring instrument 2 is a temperature measuring instrument, and the measuring instrument 3 is a voltage measuring instrument.

Then, the analog signals from the various sensors S are AD-converted into digital signals via the measuring instruments 1, 2, 3 incorporated in the 19-inch rack R, and the measuring instruments 1, 2, 3 The output digital signal is sent to a CPU (not shown) in the measurement room M.

As the various sensors S, for example, inhalation /
A plurality of pressure sensors for detecting the suction pressure and the like, a plurality of temperature sensors for detecting the temperature of exhaust gas discharged from the engine E, the temperature of cooling water, etc., or the engine E
A plurality of voltage sensors for detecting the voltage output of each part of

A field relay board 5 is housed in the field relay box 4 in the engine room L, and signals from various sensors S are collected once in the field relay board 5 and then 19 inches in the measurement room M. The cable is extended to the rack R and connected.
This is because the cables that connect the measurement room M and the engine room L are aggregated and relayed, and when changing the cables in the engine room L, it is easy to perform operations such as reconnection. That is, the pressure measuring instrument 1, the temperature measuring instrument 2, the voltage measuring instrument 3 and the like incorporated in the 19-inch rack R are large, and the large measuring instruments 1, 2, and 3 are not housed in the engine room L. Because it is difficult, on-site relay board 5
The field relay box 4 incorporating the above is installed in the engine room L to prepare for changing the cable.

Further, an engine dynamometer 6 and a throttle actuator 7 are arranged in the engine room L, while an operation unit, a printer 8, a CRT display 9, a plotter 10, a recorder 1 are arranged in the measurement room M.
Equipment for performing various data processing such as 1 is equipped. In addition, 12 is a flow path of the engine exhaust gas reaching the analyzer.

[0007]

However, in the engine measuring system configured as described above, it is difficult to store the measuring instruments 1, 2, and 3 in the engine compartment L as described above. Generally, since the inside of the measurement room M is small, if the 19-inch rack R is placed in the measurement room M, the space is occupied by that much, and the so-called environment resistance of the measurement room M deteriorates. , Measuring instruments 1, 2, 3
The 19-inch rack R must be constantly ventilated with a forced fan in order to maintain the temperature resistance of the.

The present invention has been made in view of the above problems, and an object thereof is to provide a measuring system which can widely use the measuring chamber, improve the environment resistance of the measuring chamber, and improve the temperature resistance. It is in.

[0009]

In order to achieve the above object, the present invention provides an engine measuring instrument arranged in a laboratory,
Based on the digital signal output from the engine measuring instrument
Data processing device and operating unit
Is a measurement system located in the measurement room,
In the laboratory, as the engine measuring instrument, the analog signal from each sensor provided for each measurement target is AD-converted , and the digital signal is output to the data processing device.
Smaller instrument is provided, wherein the measurement chamber, wherein the data processing device and the operation unit comprises et performs data processing based on the digital signal output from the measuring instrument
It is characterized that you have.

In the present invention, since a small measuring instrument is installed in the laboratory without installing a large measuring instrument in the measuring room as in the conventional case, it is not necessary to install the measuring instrument in the measuring room. The environment resistance of the measuring room can be improved because it becomes wider by the area where the measuring instruments are installed. In addition, since the measuring instrument according to the present invention has a closed structure of only internal circulation which is cut off from the outside, even if it is installed in a laboratory filled with dirty air including dust, equipment such as an AD converter is installed. The inside of the measuring instrument in which is placed does not come into contact with the dirty air, and the atmospheric resistance can be improved.

Further, even if the amount of heat generated by the AD converter or the like inside the measuring device is small, if the structure is closed, the internal temperature inside the measuring device rises, causing a temperature abnormality due to the internal heat generation. It can be solved by operating. That is, in the present invention, since the cooling device for cooling the measuring instrument is provided, the measuring instrument can be protected from the internal heat generation and the internal temperature in the laboratory. Therefore, unlike a large-sized measuring instrument installed in a measurement room as in the past, in the present invention, the temperature performance of the measuring instrument is higher than that of a conventional measurement instrument, even though it is installed in the laboratory. Can be improved.

Furthermore, if, for example, a compressor cooler is used as the cooling device, air exchange for cooling is not performed, so that the equipment such as the AD converter placed inside the measuring instrument is contaminated in the laboratory. It works well without being influenced by air, and the device can last a long time.
Also, because the measuring instrument can be downsized, the conventional 19-inch rack and field relay board can be dispensed with.
It is possible to save space in the room .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited thereby. The same reference numerals as those shown in FIG. 4 indicate the same or corresponding portions. In FIG. 1, an engine measuring instrument 20 is arranged in an engine room (laboratory) L, and a data processing device and an operation unit 21 for performing data processing based on a digital signal output from the measuring instrument 20 are arranged in a measuring room M. Has been done. This data processing device includes a CPU (computer) 22, a printer 8, a CRT display 9, a plotter, a recorder,
The keyboard 23 and other devices are used. An engine measurement system is composed of the engine room L and the measurement room M.

As will be described in detail with reference to FIGS. 2 and 3, the engine measuring device 20 has a small size and has a closed structure for only internal circulation which is isolated from the outside.
There is provided a cooling device 24 for cooling the.

In FIG. 2, first, the engine measuring instrument 20
Is a box-shaped one that performs analog-to-digital conversion of an analog signal from a sensor and outputs a digital signal to a data processing device. One measurement object is AD-converted for each of different categories such as pressure, temperature, and voltage. A thin type I / F board 25, 26, 27, ... And a I / F board 25, 26, 27 ,. Terminal block 28, 2
It is mainly composed of 9, ... I / F board 2
5, 26 and 27 are vertically arranged side by side on the uppermost rack 31, and for example, one A on the I / F board 25.
While a D converter (not shown) is arranged, one AD converter (not shown) is also arranged on the I / F board 26. Then, for example, a pressure amplifier A ₁ connected to _L pressure sensors P _{1 to} P _L for detecting suction / suction pressures and the like.
To A _L is installed in the terminal block 28, the of the I / F board 25 one AD converter is commonly connected to a pressure amplifier A ₁ to A _L via the cable 30, the pressure terminal block 28 that Attached to the racks 31, 32, ...

Further, the temperature amplifier B ₁ .about.B _M terminal block 29 connected to the M temperature sensor T ₁ through T _M for detecting the temperature of the temperature or the coolant such as the exhaust gas discharged from the engine E The temperature terminal block 29 is installed and is attached to the racks 31, 32, ...

As described above, in this embodiment, a plurality of racks 31, 32, ... Are provided in the engine measuring instrument 20, and the thin I / F boards 25, 26, 2 are provided in each rack 31, 32 ,.
, Are arranged side by side in a vertical state, and further, the mounting frame body T is provided with a plurality of terminal blocks 28, 29, 40, 41, 42, ... 32, ...
It is configured to be attached to the front surface S of the rack 3
Since the sealing door 34 for sealing the engine measuring instrument 20 is provided so as to close the front surface S of 1, 32, ..., The engine measuring instrument 20 can be downsized.

Next, referring to FIG. 3, the engine measuring instrument 20
Is installed in the engine room L filled with dirty air including dust and cools the measuring device 20.
Is provided. That is, the compressor cooler 24 used as a cooling device is mounted on the upper portion of the engine measuring instrument 20. The compressor cooler 24 includes a filter 36 installed at an air intake port 35 for sucking dirty air in the engine room L, a heat exchanger 38 for converting the intake air into cold air 37, and a cool air 37 blown by a fan 39. The portion 43, the warm air suction portion 44 installed at the bottom, the long warm air suction duct 45 extending from the warm air suction portion 44 to the upper fan 39 along the outer wall, and the warm air 46 serves as the fan 39 and It is composed of a suction unit 47 that reaches the outside of the apparatus via the heat exchanger 38.

In this embodiment, even if the heat generated in the engine measuring device 20 is small, the internal temperature of the engine measuring device 20 rises due to the internal structure in which only the internal circulation is cut off from the outside. A compressor cooler 24 is attached to prevent it from happening. Therefore, heat generation in the engine measuring device 20 and the engine room L
Since the engine measuring instrument 20 can be protected from the internal temperature, unlike the conventional large measuring instrument installed in the measuring chamber, the measuring instrument has excellent temperature performance, and
Since the dirty air in the engine room L is not touched, the atmosphere resistance characteristic can be improved. Moreover, since the compressor cooler 24 is used, no air is exchanged, so that the atmosphere of the equipment such as the AD converter placed inside the measuring instrument operates well without being influenced by the dirty air in the laboratory. The equipment can last longer.

Further, since the measuring instrument 20 can be miniaturized, the conventional 19-inch rack and the field relay board can be eliminated, so that the space in the measuring room M can be saved.

[0021]

As described above, according to the present invention, the measuring instrument is miniaturized, and the measuring instrument has a closed structure only for internal circulation in which the measuring instrument is cut off from the outside and the cooling device for cooling the measuring instrument is provided. Therefore, it is not necessary to install the measuring instrument in the measuring chamber as in the conventional case, and therefore the measuring instrument is widened by the installation place, and the environment resistance of the measuring chamber can be improved. Moreover,
It does not come into contact with dirty air including dust in the laboratory, and the atmospheric resistance can be improved.

Further, despite the fact that it is installed in the laboratory, the temperature performance of the measuring instrument can be improved as compared with the conventional measuring instrument.

Furthermore, if a compressor cooler is used as the cooling device, for example, air exchange for cooling is not performed, so that the equipment such as the AD converter placed inside the measuring instrument is contaminated in the laboratory. It works well without being influenced by air, and the device can last a long time.
Also, because the measuring instrument can be downsized, the conventional 19-inch rack and field relay board can be dispensed with.
It is possible to save space in the room .

[Brief description of drawings]

FIG. 1 is an overall configuration explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a view of the engine measuring instrument according to the above embodiment as seen from a door side.

FIG. 3 is a diagram showing an operation of the compressor cooler in the above embodiment.

FIG. 4 is an explanatory diagram of an overall configuration showing a conventional example.

[Explanation of Codes] 20 ... Engine Measuring Instrument, 21 ... Operation Unit, 22 ... C
PU (computer), 24 ... Compressor cooler (cooling device), 25, 26, 27 ... I / F board, 2
8, 29, 40, 41, 42 ... Terminal block, 31, 32 ... Rack, 38 ... Heat exchanger, 45 ... Long warm air suction duct,
L ... Engine room (laboratory), M ... Measuring room.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01M 15/00

Claims (2)

(57) [Claims] 1. An engine instrument is located in a laboratory and
Based on the digital signal output from the engine measuring instrument
Data processing device and operation unit for performing data processing
Is a measurement system arranged in a measurement room,
In the laboratory, as the engine measuring device , analog signals from each sensor provided for each measurement target are AD-converted.
At the same time, it outputs a digital signal to the data processing device.
That small instrument is provided, wherein the measurement chamber, wherein the data processing device and the operation unit performs data processing based on the digital signal output from the measuring instrument is provided
Measurement system according to claim Tei Rukoto. 2. The measuring instrument is an internal circuit which is isolated from the outside.
It has a closed structure only, and the measuring instrument has the
A cooling device for cooling the vessel is provided.
Use a cooling device without air exchange for cooling,
The AD converter placed inside the measuring instrument is installed in the laboratory.
Contractor configured to operate independently of dirty air
The measurement system according to claim 1.