JP3606491B2 - Engine measuring instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine measuring instrument, for example, provided in an engine measuring system that performs various data processing by performing measurement and control such as a performance test and an endurance test according to the category of a measurement target in a bench engine. in addition to AD convert the analog signals from the sensors provided correspondingly, the present invention relates to an engine measurement device for outputting them converted digital signal to the data processing apparatus installed in the measurement chamber.
[0002]
[Prior art]
A measuring instrument used in a conventional engine measuring system will be described with reference to FIGS. 5 and 7, for example, one or two large racks R having a width of 19 inches, for example, are set up in the measurement chamber M, and the measuring instruments 1, 2, 3 is incorporated corresponding to the various sensors 30 installed in the engine E placed in the engine room (engine laboratory) L. For example, the measuring instrument 1 may be a pressure measuring instrument, the measuring instrument 2 may be a temperature measuring instrument, and the measuring instrument 3 may be a voltage measuring instrument. Reference numeral 4 denotes a controller incorporated in the measurement chamber M.
[0003]
The measuring instruments 1, 2, 3 incorporated in the 19-inch rack R are for AD-converting analog signals from the various sensors 30 and sending them to a CPU (computer) 12 in the measuring chamber M.
[0004]
As the various sensors 30 in the engine laboratory L, for example, L (several tens) pressure sensors P _{1 to} P _L for detecting intake / exhaust pressure and the temperature of exhaust gas discharged from the engine E Alternatively, M (several tens) temperature sensors T _{1 to} T _M that detect the temperature of the cooling water, or N (several tens) voltage sensors V ₁ to V that detect the voltage output of each part of the engine E. V _{N and the} like can be mentioned.
[0005]
A field relay panel 5 is installed in the field relay box B in the engine laboratory L. This site repeater panels 5, sensors P ₁ to P _L detected by the L-number of the output signal c ₁ to c _L, sensor T ₁ through T _M detected by the M output signals d ₁ to d _M, sensor This is for sending _N output signals e _{1 to} e N detected at V _{1 to} V _N to the measuring instruments 1, 2, 3 incorporated in the 19-inch rack R.
[0006]
That is, the output signals c _{1 to} c _L , d _{1 to} d _M , and e _{1 to} e _N are once collected in the field relay panel 5 in the engine laboratory L and then to the 19-inch rack R in the measurement room M to be described later. The cables S, T, and U to be connected were extended. This is a change in the cable in the engine laboratory L when the number of cables connecting the measurement chamber M and the engine laboratory L is reduced as much as possible and the measurement object is changed from pressure to, for example, temperature or voltage. This is to facilitate operations such as reconnection.
[0007]
And all the measuring instruments, such as the pressure measuring instrument 1, the temperature measuring instrument 2, and the voltage measuring instrument 3, are attached to one terminal block 6 arranged in the 19-inch rack R. For example, the pressure measuring instrument 1 includes a number of dedicated boxes 1 _A to 1 _L (see FIG. 6) corresponding to the output signals c _{1 to} c _L. Furthermore, as shown in FIG. 5, a pressure amplifier 8 and an AD converter 9 juxtaposed on the I / F board are installed in the dedicated boxes 1 _A to 1 _L.
The dedicated boxes for the temperature measuring instrument 2 and the voltage measuring instrument 3 have the same configuration.
[0008]
For example, the at the time of use of a pressure measuring instrument 1, only box 1 _A to 1 _{pressure L} dozens cables S to send to correspond respectively corresponding from the site repeater panels 5 dozens of analog voltage signals c On the other hand, the AD converter 9 is connected to the pressure terminal 7 via the pressure amplifier 8 in the dedicated boxes 1 _A to 1 _L while being connected to the terminal 7. That is, in FIG. 5, the analog voltage signal c is AD-converted by the dedicated boxes 1 _A to 1 _L , and is input as a digital signal f to the CPU 12 provided in the measurement chamber M to perform data processing.
[0009]
In addition to the pressure terminal 7, the temperature terminal 10 (see FIG. 6), the voltage terminal 11, and the like are the same so that the terminal block 6 can be used even if the measurement object is changed from pressure to, for example, temperature or voltage. It is installed on the terminal block 6. That is, the terminal block 6 also serves as a terminal block for the temperature measuring instrument 2 and the voltage measuring instrument 3.
[0010]
The temperature measuring device 2 also includes a number of dedicated boxes (not shown) corresponding to the output signals d _{1 to} d _M , and when the temperature measuring device 2 is used, several tens of analog voltage signals d from the field relay panel 5 are used. Are connected to the corresponding temperature terminals 10 (see FIG. 6), while AD conversion is performed via a temperature amplifier (not shown) in the dedicated box. A vessel (not shown) is connected to each of the temperature terminals 10. That is, in FIG. 5, the analog voltage signal d is AD-converted in a dedicated box and input as a digital signal g to the CPU 12 provided in the measurement chamber M for data processing.
[0011]
Similarly, the voltage measuring instrument 3 includes a number of dedicated boxes (not shown) corresponding to the output signals e _{1 to} e _N , and when the voltage measuring instrument 3 is used, several tens of analog voltage signals are transmitted from the field relay panel 5. While connecting dozens of cables U for sending e to the corresponding dedicated box to the corresponding voltage terminal 11 (see FIG. 6), AD conversion is performed via a voltage amplifier (not shown) in the dedicated box. A device (not shown) is connected to the voltage terminal 11. That is, in FIG. 5, the analog voltage signal e is A / D converted in a dedicated box and input to the CPU 12 provided in the measurement chamber M as a digital signal h for data processing.
[0012]
In the engine laboratory L, a dynamometer 13 and a throttle actuator 14 are arranged together with the engine E. In the measurement chamber M, various data processing such as an operation unit, a printer 16, a CRT display 17, a plotter 41, and a recorder 42 are performed. Equipped with equipment to do. Reference numeral 43 denotes an exhaust gas flow path leading to the analyzer.
[0013]
[Problems to be solved by the invention]
However, since the single terminal block 6 serves as a terminal block for all measuring instruments such as the pressure measuring instrument 1, the temperature measuring instrument 2, the voltage measuring instrument 3, etc., when the measurement target is changed, for example, measurement subject, even if the change from the pressure on the temperature, because use the terminal base 6 of that, it is necessary to replace each dedicated box instrument. That is, when performing another temperature detection in addition to the temperature detection by the temperature terminal 10, the dedicated boxes 1 _A to 1 _L for pressure measurement that are no longer required are used as dedicated boxes for temperature measurement. replaced must, Moreover, along with an inconvenient time consuming adjustment or the like, it is necessary to replace an expensive AD converter 9 your. In addition, the system must be modified.
[0014]
Furthermore, since the measuring instruments such as the pressure measuring instrument 1, the temperature measuring instrument 2, and the voltage measuring instrument 3 are large, they cannot be accommodated in the engine laboratory L. Therefore, although have established incorporating bother site repeater panels 5 into the engine laboratory L situ relay box B, change the cable, the ones from those for the pressure pin 7 connected for temperature terminal 10 connected (cable Change from S to cable T). Further, for example, in the pressure measuring instrument 1, it is expensive because it is necessary to install the AD converter 9 of multiple corresponding to the output signal c ₁ to c _L a dedicated box.
[0015]
The present invention was made in view of the above problems, and its object is to change the measurement target easily and inexpensively can be carried out, and miniaturization of the instrument itself, the aim of saving space, engine it is to provide an engine measurement device that can be both good laboratory and measuring room environment.
[0016]
[Means for Solving the Problems]
To achieve the above object, the engine instrumentation of the present invention is placed in an engine laboratory, the analog signals from a plurality of sensors provided corresponding to the number of measurement target as well as AD conversion, is their transformation and the engine measurement device for force out to the data processing apparatus installed digital signal to the measurement chamber, with a commonly usable AD converter to all of the measurement target for each different measurement target category for each one respectively includes a plurality of I / F board, a plurality of the terminal block connected to the amplifier to a plurality of sensors are provided respectively for different categories of the measured object is placed belonging to the same category, each terminal block, the It is attached to each I / F board so as to be exchangeable with each other, and the measurement object can be changed only by exchanging the terminal block .
[0017]
In the present invention, since the amplifier connected to a plurality of sensors belonging to the same category are respectively a terminal block installed for different categories of the measurement target, when changing the target object, the difference of the measurement object It can be absorbed by only the terminal block , and changes in the measurement target can be easily handled by replacing only the terminal block.
[0018]
Further, since the AD converter for each different measurement target category of the plurality of I / F board with each one of the AD converters each Ru der can be commonly used for all of the measurement object such as pressure measurement, temperature detection, For example, when performing another temperature detection in addition to the temperature detection by the temperature terminal block, replace the pressure measurement terminal block for the pressure measurement, which is no longer necessary, with a temperature measurement terminal block. The measurement object can be changed from pressure to temperature simply by coupling the temperature measurement terminal block to the AD converter used for pressure measurement. That is, the I / F board with one of the AD converter disconnect the pressure measuring terminal blocks, the target object without replacing even only by AD converter mounting the terminal block for temperature measurement in the I / F board Can be changed. On the other hand, conventionally, since it is a structure that also serves as a terminal block of all measuring instruments such as a pressure measuring instrument, a temperature measuring instrument, and a voltage measuring instrument with one terminal block, for example, when the measurement target is changed, measurement object, because to use also the terminal block that is changed from the pressure on the temperature, must be replaced each dedicated box containing a plurality of AD converters and, moreover, also adjustment is inconvenient time-consuming.
In short, in the past, if the measurement object was changed, it was necessary to replace each dedicated measurement instrument including a plurality of AD converters for each measurement object. In the present invention, however, the AD conversion common to all measurement objects is required. vessel without replacing, only need to replace the terminal block dedicated in accordance with the measurement object.
[0019]
Further , in the conventional measuring instrument, the AD converter and the I / F board corresponding to the number of sensor outputs are provided for different categories to be measured, whereas in the present invention, the AD converter and the I / F board are provided. and it requires each different measurement target category only each respective one installation, Rutotomoni Hakare the cost, since the measurement in one of the I / F board, can reduce the size of the instrument itself, the engine of this instrument Even if it is installed in a laboratory, there is no problem in space, that is, space can be saved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same code | symbol as described in FIG. 5, FIG. 7 is the same or an equivalent part.
1 to 4, an engine measuring device 20 performs AD conversion on an analog signal from a sensor and outputs a digital signal to a data processing device, and the measurement target is in different categories such as pressure, temperature, and voltage. Each of which includes an I / F board having one AD converter. For example, the AD converter 21 is disposed on the I / F board 31, and the AD converter 22 is disposed on the I / F board 32. The AD converters 21 and 22 are configured so that they can be used in common for all measurement targets even if the measurement targets are different. For example, pressure amplifiers A _{1 to} A _L connected to _L pressure sensors P _{1 to} P _L (see FIG. 5) for detecting suction / suction pressures, etc. are installed on the pressure terminal block 23. A pressure terminal block 23 is attached to the I / F board 31. Further, M-number of the temperature sensors T ₁ through T _M temperature terminal block connected thereto temperatures amplifier B1 to Bm are (see FIG. 5) for detecting the temperature of the temperature or the cooling water of the exhaust gas discharged from the engine E The temperature terminal block 24 is attached to the I / F board 32.
[0021]
FIG. 4 shows a measurement system using the engine measuring instrument 20. In FIG. 4, the engine measuring instrument 20 is disposed in the engine laboratory L, and a data processing device and an operation unit 15 that perform data processing based on a digital signal output from the engine measuring instrument 20 are disposed in the measuring chamber M. Yes. This data processing apparatus includes devices such as a CPU 12, a printer 16, a CRT display 17, a plotter, a recorder, and a keyboard 18. The I / F boards 31 and 32 shown in FIG. 1 are connected to the CPU 12 via the buses 41a, 41b, 42a and 42b, and the cable W. 34 is an OA desk, and Z is a cable from the engine measuring instrument 20 to the operation unit 15.
[0022]
In the engine measuring instrument 20 having the above configuration, unlike the measuring instrument of the conventional configuration, the measurement target includes only one AD converter 21 and 22 and I / F boards 31 and 32 for each different category such as pressure and temperature. Therefore, in the case where another temperature detection is performed in addition to the temperature detection by the temperature terminal block 24, the pressure terminal block 23 for pressure measurement, for example, which is no longer required to be detected, is removed from the I / F board 31. The object to be measured can be easily changed from pressure to temperature by removing and attaching a temperature terminal block (not shown) having a desired temperature amplifier to the I / F board 31.
[0023]
In addition, compared to conventional measuring instruments, only one AD converter 21, 22 is installed for each category to be measured, which reduces costs and is provided for each category to which conventional measuring objects differ. Since the measurement is performed with one I / F board 31 and 32 instead of the plurality of boxes, the measuring instrument itself can be reduced in size. Therefore, the engine measuring instrument 20 can be placed in the engine laboratory L, and the engine measuring system has the following advantages.
[0024]
First, the engine measuring instrument 20 itself also serves as the on-site relay panel 5 that has been conventionally installed in the engine laboratory L. Therefore, the on-site relay box B can be eliminated, and space saving can be achieved.
[0025]
In addition, the distance from the various sensors to the engine measuring instrument 20 can be shortened, making it less susceptible to disturbances.
[0026]
Furthermore, since the 19-inch rack R in which the measuring instruments 1, 2, 3 and the like are incorporated in the measurement chamber M can be made unnecessary, space saving of the measurement chamber M can be achieved.
[0027]
【The invention's effect】
As described above, according to the present invention, a plurality of I / F boards having AD converters that can be used in common for all measurement objects, one for each of different categories of measurement objects , belong to the same category. since a plurality of terminal blocks connected amplifiers respectively provided for different categories of the measured object is placed on the sensor is mounted interchangeably, can absorb the difference of the measurement object at each terminal block only , to change the measurement target, common AD converter to all of the measurement target does not need to be replaced, easily the target object by simply replacing only the terminal block, and can be inexpensively changed.
[0028]
Moreover, it is only necessary to install one AD converter and one I / F board for each of the different categories to be measured, and the size can be reduced as compared with a conventional measuring instrument, thereby providing an inexpensive engine measuring instrument. In addition, since measurement is performed with a single I / F board, the engine measuring instrument itself can be further miniaturized. Even if the engine measuring instrument is installed in the engine laboratory, there is no problem in space, and the entire measuring system is saved. There is an advantage that the environment of the engine laboratory and the measurement room can both be improved by making space .
[Brief description of the drawings]
FIG. 1 is a diagram showing a terminal block mounting structure according to an embodiment of the present invention.
FIG. 2 is a diagram showing an I / F board and a terminal block in the embodiment.
FIG. 3 is a view of the engine measuring instrument of the embodiment as seen from the back side.
FIG. 4 is an overall configuration explanatory diagram showing an engine measurement system using the engine measuring instrument of the embodiment.
FIG. 5 is an explanatory diagram of an entire configuration showing a conventional example.
FIG. 6 is a view showing a structure for attaching a pressure measuring instrument to a terminal block in a conventional example.
FIG. 7 is an explanatory diagram of an overall configuration showing an engine measurement system using a conventional engine measuring instrument.
[Explanation of symbols]
12 ... CPU, 15 ... operation unit, 20 ... engine instrumentation, 21, 22 ... AD converter, 23 and 24 ... terminal block, 31 and 32 ... I / F board, E: engine, A ₁ to A _L ... pressure Amplifier, B _{1 to} B _M ... temperature amplifier, W, Z ... cable, L ... engine laboratory, M ... measurement room .

Claims (1)

Disposed in the engine laboratory, the analog signals from a plurality of sensors provided corresponding to the number of measurement target as well as AD conversion, leaving them converted digital signal to the data processing apparatus installed in the measurement chamber Powerful engine measuring instruments, each with different I / F boards that have AD converters that can be used in common for all measuring objects, and sensors that belong to the same category. and a plurality of terminal blocks which are provided respectively for different categories to which the measurement target is installed connected amplifier, the terminal block is mounted interchangeably with respect to the respective I / F board An engine measuring instrument characterized in that the measurement object can be changed only by replacing the terminal block .

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