WO2021181702A1 - Thermometer characteristic information generation system and thermometer characteristic information generation method - Google Patents

Abstract

[Problem] To provide a thermometer characteristic information generation system for generating thermometer characteristic information for allowing a thermometer to measure a temperature with high response. [Solution] A thermometer characteristic information generation system W1 is provided with a measuring device 110 for calculating thermometer characteristic information. The measuring device 110 includes: a data acquisition unit 112 that, while an engine test device 1 introduces air into an engine cylinder 11 to perform a compression operation without burning an engine E, acquires the in-cylinder temperature of the cylinder 11 measured by a thermometer 101, the in-cylinder pressure of the cylinder 11 measured by a pressure gauge 101, and the flow rate of air that flows into the engine 11 measured by a flow meter 103; and a thermometer characteristic calculation unit 112 which calculates a reference temperature as the true value of the temperature inside the engine cylinder 11 by using the ideal gas state equation and the acquired in-cylinder pressure and air flow rate, and calculates the transfer function of the thermometer by using the reference temperature and the acquired in-cylinder temperature.

Description

Thermometer characteristic information generation system and thermometer characteristic information generation method

The present invention relates to a thermometer characteristic information generation system and a thermometer characteristic information generation method, for example, a thermometer characteristic information generation system that generates thermometer characteristic information so that a thermometer can measure a temperature with high response. The present invention relates to a method for generating thermometer characteristic information.

Conventionally, an engine test device has been used in which a dynamometer is connected to a specimen such as an engine and various characteristics of the engine are measured by simulation. Further, in an engine test using an engine test device, the temperature inside the cylinder of the engine cylinder and the intake / exhaust temperature are measured and grasped by a high-speed response thermometer.

Further, in the above engine test, for example, the "fast response electrode microthermocouple probe (TCFW)" of "Medtherm CORPORATION in the United States" is used as the thermometer. The "fast response electrode fine thermocouple probe" of MEDTHERM CORPORATION is disclosed in Non-Patent Document 1.

By the way, in the above-mentioned engine test, even if the temperature inside the cylinder of the engine cylinder and the intake / exhaust temperature are measured by using the thermometer described in Non-Patent Document 1, the thermometer cannot detect the temperature with high response. , Has a technical problem that an accurate temperature may not be obtained. Therefore, in a thermometer used in an environment such as the above-mentioned engine test, a technique capable of measuring temperature with high response is desired.

The present invention has been made in view of the above problems, and an object of the present invention is a thermometer characteristic information generation system and a temperature, which generate thermometer characteristic information so that a thermometer can measure temperature with high response. The purpose is to provide a method for generating meter characteristic information.

The first aspect of the present invention for solving the above problems is a thermometer for measuring the in-cylinder temperature of the engine cylinder of the engine installed in the engine test apparatus, and a pressure gauge for measuring the in-cylinder pressure of the engine cylinder. A thermometer characteristic information generation system including a flow meter for measuring the flow rate of air flowing into the engine cylinder and a measuring device for calculating thermometer characteristic information, wherein the measuring device is the engine test device. The in-cylinder temperature measured by the thermometer, the in-cylinder pressure measured by the pressure gauge, and the in-cylinder pressure measured by the thermometer while air is flowing into the engine cylinder to perform a compression operation without burning the engine. The true value of the temperature inside the engine cylinder using the data acquisition unit that acquires the air flow rate measured by the flow meter, the state equation of the ideal gas stored in advance, and the acquired in-cylinder pressure and air flow rate. It is characterized by having a thermometer characteristic calculation unit that calculates a reference temperature as a reference temperature and calculates a transmission function of the thermometer as the thermometer characteristic information using the reference temperature and the acquired in-cylinder temperature.

Further, the thermometer characteristic calculation unit performs a Fourier analysis calculation using the reference temperature as an input value and the in-cylinder temperature measured by the thermometer corresponding to the reference temperature as an output value to obtain the transmission characteristics of the thermometer. It is desirable that the transfer function is calculated from the calculated transfer characteristics.
Further, the thermometer characteristic calculation unit calculates a regression transfer function from the calculated transfer function, and the measuring device corrects the measured value measured by the thermometer using the regression transfer function. It is desirable to have a temperature compensating unit.

As described above, according to the first aspect of the present invention, since the thermometer characteristic information (transmission function, regression transfer function) of the thermometer can be obtained, this temperature can be measured even in a temperature measurement used in an environment such as an engine test. By correcting the measured value by the thermometer using the meter characteristic information, the temperature can be measured with high response.

Further, in the second aspect of the present invention, the first valve and the pipe in which the second valve is installed are provided, pressurized air is supplied to the pipe, and the opening / closing operation of the first and second valves is controlled. A pressure step response device that changes the pressure inside the pipe in a step-like manner, a first thermometer that measures the pressure inside the pipe, a first pressure gauge that measures the pressure inside the pipe, and a pipe wall of the pipe. Thermometer characteristic information generation including a second thermometer for measuring temperature, a third thermometer for measuring outside temperature, a second pressure gauge for measuring outside pressure, and a measuring device for calculating thermometer characteristic information. In the system, the measuring device provides dimensional information of the pipe, composition information of the pressurized air, initial pressure and initial temperature in the pipe of the pipe, and flow path resistance of the first and second valves. The simulation condition information including the indicated valve information is stored, and the pressure inside the pipe measured by the first thermometer while the pressure step response device is changing the pressure of the pipe in a stepwise manner. , The pressure inside the pipe measured by the first pressure gauge, the pipe wall temperature measured by the second thermometer, the outside temperature measured by the third thermometer, and the outside pressure measured by the second pressure gauge. A thermo-fluid model flowing through the pipe is generated by a simulation using the data acquisition unit to be acquired, the simulation condition information, and one-dimensional fluid analysis using the acquired pipe wall temperature, outside temperature, and outside pressure. Using the acquired pipe pressure and the thermo-fluid model generated by the simulation, the fluid analysis processing unit that calculates the reference temperature as the true value of the temperature inside the pipe, the calculated reference temperature, and the acquired pipe interior. It is characterized by having a thermometer characteristic calculation unit that calculates a transmission function of the thermometer as the thermometer characteristic information using temperature.

As described above, according to the second aspect of the present invention, since the transfer function of the thermometer can be obtained as in the first aspect described above, the measurement measured by the thermometer using the transfer function calculated from the transfer function. By correcting the value, the temperature can be measured with high response. Further, in the second aspect, unlike the first aspect, it is not necessary to install and drive an engine, so that the thermometer characteristic information can be obtained by space-saving and simple equipment at a lower cost than in the first aspect. Can be calculated.

Further, the pressure step response device, wherein a pressurized air supply device for supplying pressurized air to the pipe, the first, and a valve operating device for controlling the opening and closing operation of the second valve, before Symbol first A valve is installed on one end side of the pipe, the second valve is installed on the other end side of the pipe, and the valve operating device controls the open / closed state of the first and second valves. The pressurized air supplied from the pressurized air supply device is confined between the first and second valves, and then the open / closed state of the second valve is controlled to control the pressure of the pressurized air in the pipe. It is desirable that it is changed in steps.
As described above, according to the present invention, it is possible to realize an environment in which the pressure in the pipe of the pipe is changed in a stepwise manner by a relatively simple configuration.
In the above configuration, in order to acquire more accurate thermometer characteristic information, it is desirable to measure the temperature inside the pipe / pipe at a point where the flow velocity is close to "0 m / s" (Reynolds number 2000 or less).

Further, the pressure step response device includes a pressurized air supply device that supplies pressurized air to the pipe and a valve operating device that controls the opening / closing operation of the first and second valves. A first straight pipe portion extending in the first direction and a second straight pipe portion connected to the other end of the first straight pipe portion and extending in a direction perpendicular to the first straight pipe portion. The first straight pipe portion is provided with a pipe portion, both ends of which are penetrating, one end thereof is connected to the pressurized air supply device, and the other end portion is the other end side of the second straight pipe portion. The second straight pipe portion is connected to the side surface of the above, and one end thereof is a closed surface and the other end portion is open, and the first valve is installed in the first straight pipe portion. The second valve is installed at the other end of the second straight pipe portion so that the opening of the other end portion can be opened and closed, and the thermometer is the second straight pipe portion. The valve operating device is installed near the sealing surface on one end side, and the valve operating device controls the open / closed state of the first and second valves to control the open / closed states of the first and second valves to control the first and second valves and the second straight pipe portion. The pressurized air supplied from the pressurized air supply device is confined in the region formed between the sealing surfaces at one end of the valve, and then the open / closed state of the second valve is controlled to add the piping. It is desirable that the pressure of the pressure air is changed in steps.
According to the above configuration, the temperature inside the pipe / pipe can be measured at the point where the flow velocity is close to "0 m / s" (Reynolds number 2000 or less), so that more accurate thermometer characteristic information can be generated. can.

A third aspect of the present invention includes a thermometer for measuring the in-cylinder temperature of the engine cylinder of the engine installed in the engine test apparatus, a pressure gauge for measuring the in-cylinder pressure of the engine cylinder, and the engine cylinder. A thermometer characteristic information generation method using a flow meter for measuring the inflowing air flow rate and a measuring device for calculating thermometer characteristic information, wherein the engine test device does not burn the engine. The step of inflowing air into the cylinder to perform the compression operation, and the temperature inside the cylinder measured by the thermometer while the measuring device is injecting air into the engine cylinder to perform the compression operation. The step of acquiring the in-cylinder pressure measured by the pressure gauge and the air flow rate measured by the flow meter, the state equation of the ideal gas stored in advance by the measuring device, and the acquired in-cylinder pressure and air. The reference temperature is calculated as the true value of the temperature inside the engine cylinder using the flow rate, and the transmission function of the thermometer is calculated as the thermometer characteristic information using the reference temperature and the acquired in-cylinder temperature. It is characterized by performing steps and.

Further, a fourth aspect of the present invention includes a pipe in which a first valve and a second valve are installed, supplies pressurized air to the pipe, and controls the opening / closing operation of the first and second valves. A pressure step response device that changes the pressure inside the pipe in a step-like manner, a first thermometer that measures the pressure inside the pipe, a first pressure gauge that measures the pressure inside the pipe, and a pipe wall of the pipe. Thermometer characteristic information generation using a second thermometer that measures temperature, a third thermometer that measures outside temperature, a second pressure gauge that measures outside pressure, and a measuring device that calculates thermometer characteristic information. According to the method, the measuring device is provided with dimensional information of the pipe, composition information of the pressurized air, initial pressure and initial temperature in the pipe of the pipe, and flow path resistance of the first and second valves. Simulation condition information including valve information indicating the above is stored, and the pressure step response device changes the pressure in the pipe of the pipe in a step-like manner, and the measuring device measures the pressure in the pipe of the pipe. The pipe wall temperature measured by the first thermometer, the pipe pressure measured by the first pressure gauge, the pipe wall temperature measured by the second thermometer, and the above The step of acquiring the outside temperature measured by the third thermometer and the outside pressure measured by the second pressure gauge, and the measuring device obtains the simulation condition information, the acquired tube wall temperature, the outside temperature, and the outside. A thermo-fluid model flowing through the pipe is generated by a simulation using one-dimensional fluid analysis using pressure, and the obtained pipe pressure and the thermo-fluid model generated by the simulation are used to generate a thermo-fluid model in the pipe. A step of calculating the reference temperature as the true value of the fluid temperature, and a step of the measuring device calculating the transmission function of the thermometer as the thermometer characteristic information using the calculated reference temperature and the acquired pipe temperature. It is characterized by executing and.

According to the present invention, it is possible to provide a thermometer characteristic information generation system and a thermometer characteristic information generation method for generating thermometer characteristic information so that the thermometer can measure temperature with high response.

It is a schematic diagram which showed the structure of the thermometer characteristic information generation system of 1st Embodiment of this invention. It is a flowchart which showed the procedure of the thermometer characteristic information generation processing of the thermometer characteristic information generation system of 1st Embodiment of this invention. It is a schematic diagram which showed the input / output relationship of the transmission characteristic of the thermometer calculated by the thermometer characteristic information generation system of 1st Embodiment of this invention. It is an image diagram for demonstrating the process which the thermometer characteristic information generation system of 1st Embodiment of this invention identifies by fitting a transfer function to the transfer characteristic of a thermometer. It is a schematic diagram which showed the structure of the thermometer characteristic information generation system of 2nd Embodiment of this invention. It is a flowchart which showed the procedure of the thermometer characteristic information generation processing of the thermometer characteristic information generation system of the 2nd Embodiment of this invention. It is a schematic diagram which showed the input / output relationship of the transmission characteristic of the thermometer calculated by the thermometer characteristic information generation system of the 2nd Embodiment of this invention. It is a schematic diagram which showed the structure of the thermometer characteristic information generation system of the modification of 2nd Embodiment of this invention.

Hereinafter, the thermometer characteristic information generation system of the embodiment of the present invention (first embodiment, second embodiment) will be described with reference to the drawings.

<< First Embodiment >>
First, the configuration of the thermometer characteristic information generation system according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

Here, FIG. 1 is a schematic diagram showing the configuration of the thermometer characteristic information generation system of the first embodiment. FIG. 2 is a flowchart showing a procedure of thermometer characteristic information generation processing of the thermometer characteristic information generation system of the first embodiment. FIG. 3 is a schematic diagram showing the input / output relationship of the transmission characteristics of the thermometer calculated by the thermometer characteristic information generation system of the first embodiment. FIG. 4 is an image diagram for explaining a process of fitting and identifying a transfer function to the transfer characteristics of the thermometer by the thermometer characteristic information generation system of one embodiment.

As shown in FIG. 1, the thermometer characteristic information generation system W1 of the first embodiment has the temperature inside the cylinder of the engine cylinder 11 of the engine E installed on the engine bench (engine test device) 1 (in-cylinder temperature (T). ')), A thermometer 101 that measures the pressure inside the cylinder of the engine cylinder 11 (in-cylinder pressure (P)), and a pressure gauge 102 that measures the air flow rate (n) that flows into the engine cylinder 11. A measuring device that calculates thermometer characteristic information (transmission function, regression transmission function) of the thermometer 101 using the measured values measured by the thermometer 103 and each sensor (thermometer 101, pressure gauge 102, and flow meter 103). Has 110 and.
The engine bench 1 is a step of measuring the measured values for calculating the thermometer characteristic information (transmission function, regression transmission function) of the thermometer 101 with each sensor (thermometer 101, pressure gauge 102 and flow meter 103). In the above, the engine cylinder 11 is compressed by the dynamo rotation control by flowing air into the engine E without burning the engine E.

Further, the thermometer 101, the pressure gauge 102, and the flow meter 103 are each connected to the measuring device 110 by wire or wirelessly so that signals can be exchanged between the measuring device 110 and the measuring device 110.
Further, the thermometer 101 is installed in the cylinder of the engine cylinder 11, measures the in-cylinder temperature (T') of the engine cylinder 11 of the engine E, and measures the in-cylinder temperature (T') in the measuring device 110. ') Is sent. Further, the pressure gauge 102 is installed in the cylinder of the engine cylinder 11, measures the in-cylinder pressure (P) of the engine cylinder 11 of the engine E, and measures the in-cylinder pressure (P) in the measuring device 110. To send. Further, the flow meter 103 is installed in the intake pipe (intake pipe) 5 connected to the intake manifold 3 that sends air to the engine cylinder 11, and measures the air flow rate (n) of the air flowing into the engine E. The measurement is performed, and the measured air flow rate (n) is transmitted to the measuring device 110.

The thermometer 101 may be any one as long as it is generally used in an engine test or the like, but in the first embodiment, as an example, the above-mentioned non-patented thermometer 101 is used. The thermometer shown in Document 1 is used.
Further, reference numeral 7 in the figure indicates a throttle valve, and reference numeral 9 indicates an exhaust pipe for discharging air from the engine E.

The measuring device 110 has measured values (in-cylinder temperature (T'), in-cylinder pressure (P), air flow rate (n)) transmitted from each sensor (thermometer 101, pressure gauge 102, and flow meter 103). To receive. Further, among the received measured values, the control device 110 includes the in-cylinder pressure (P), the air flow rate (n), and the "ideal gas state equation (hereinafter, simply referred to as" state equation ")" stored in advance. And, the reference temperature (T) is calculated.

Further, as will be described in detail later, the measuring device 110 uses the above reference temperature (T) and the in-cylinder temperature (T') obtained from the thermometer 101 to obtain a transfer function (Gx (Gx)) of the thermometer 101. s))) is calculated, and a regression transfer function (Gy (s)) is generated from the transfer function (Gx (s)) and stored. In this way, if the regression transfer function (Gy (s)) of the thermometer 101 is obtained and set in the measuring device 110, the cylinder measured by the thermometer 101 in the subsequent performance test of the engine E or the like. By correcting the internal temperature (T') using the regression transfer function (Gy (s)), an in-cylinder temperature having good responsiveness can be obtained.

Further, the engine bench 1 controls the operation of the dynamometer 10 that applies a load to the engine E to be tested, the shaft 15 that connects the rotation shaft of the dynamometer 10 and the rotation shaft of the engine E, and the operation of the dynamometer 10. It includes a dynamo control device 11 and an engine control device (not shown) that controls the operation of the engine.
Since the engine bench 1 uses a well-known technique, detailed description thereof will be omitted. Further, since the engine E to be tested has a well-known configuration, only the part directly related to the thermometer characteristic information generation system W1 of the first embodiment is shown in the figure.

Next, the functional configuration of the measuring device 110 constituting the thermometer characteristic information generation system W1 of the first embodiment will be described.
The measuring device 110 includes a control unit 111, a data acquisition unit 112, a thermometer characteristic calculation unit 113, and a temperature correction unit 114.

The hardware configuration of the measuring device 110 is not particularly limited, but the measuring device 110 is, for example, a computer (one or a plurality of computers) having a CPU, an auxiliary storage device, a main storage device, a network interface, and an input / output interface. Can be configured by. In this case, each sensor (thermometer 101, pressure gauge 102, and flow meter 103) is connected to the input / output interface. Further, the auxiliary storage device stores a program for realizing the functions of the "control unit 111, the data acquisition unit 112, the temperature characteristic calculation unit 113, and the temperature correction unit 114". The functions of the "control unit 111, the data acquisition unit 112, the temperature characteristic calculation unit 113, and the temperature correction unit 114" are realized by the CPU loading the program into the main storage device and executing the program.

Further, the control unit 111 controls the entire operation of the measuring device 110, receives various settings and inputs from the user, and receives an operation request of the thermometer characteristic information generation system W1.

The data acquisition unit 112 has measured values (in-cylinder temperature (T'), in-cylinder pressure (P), air flow rate) measured by each sensor (thermometer 101, pressure gauge 102, and flow meter 103) at a predetermined measurement timing. (N)) is acquired.

Further, the thermometer characteristic calculation unit 113 stores the equation of state shown in the following (Equation 1).
[Number 1]
PV = nRT ... (Equation 1)
R: Gas constant Then, the thermometer characteristic calculation unit 113 uses the “cylinder” of the measured values (in-cylinder temperature (T'), in-cylinder pressure (P), air flow rate (n)) acquired by the data acquisition unit 112. The reference temperature (T) is calculated using the internal pressure (P) and the air flow rate (n) ”and the equation of state shown in (Equation 1).
Further, the thermometer characteristic calculation unit 113 calculates the transfer function (Gx (s)) of the thermometer using the calculated reference temperature (T) and the in-cylinder temperature (T'). Further, the regression transfer function (Gy (s)) is generated and stored from the temperature characteristic calculation unit 113 and its transfer function (Gx (s)).

Further, the temperature correction unit 114 uses the calculated regression transfer function (Gy (s)) in an engine test or the like separately performed after the regression transfer function (Gy (s)) of the thermometer 101 is calculated. , The in-cylinder temperature (T') of the engine cylinder 11 measured by the thermometer 101 is corrected.

Next, the procedure of the thermometer characteristic information generation process performed by the thermometer characteristic information generation system W1 of the first embodiment will be described with reference to FIGS. 1 to 4.

As shown in FIG. 2, first, the thermometer characteristic information generation system W1 performs a data measurement process (S1).
In this data measurement process (S1), the engine bench 1 is driven, air flows into the engine E without burning the engine E installed on the engine bench 1, and the inside of the cylinder of the engine cylinder 11 is controlled by the dynamo rotation. The operation of compressing is performed. It can be assumed that the engine cylinder 11 is in a substantially adiabatic state during in-cylinder compression.
Then, while the operation of compressing the inside of the cylinder of the engine cylinder 11 is being performed, the data acquisition unit 112 of the measuring device 110 constituting the thermometer characteristic information generation system W1 receives the temperature inside the cylinder of the engine cylinder 11 (T'. ), The in-cylinder pressure (P), and the air flow rate (n) of the air (fluid) flowing into the engine E.

Specifically, in S1, the data acquisition unit 112 of the measuring device 110 starts the thermometer 101 installed in the cylinder of the engine cylinder 11 for a predetermined measurement time (monitoring time) at a predetermined measurement timing to the engine cylinder 11. The in-cylinder temperature (T') of the engine cylinder 11 is acquired, and the in-cylinder pressure (P) of the engine cylinder 11 is acquired from the pressure gauge 102 installed in the cylinder of the engine cylinder 11. The air flow rate (n) flowing into the engine E is acquired from the installed flow meter 103.
Further, the data acquisition unit 112 stores the acquired measured values (in-cylinder temperature (T'), in-cylinder pressure (P), air flow rate (n)) in association with each measurement time (for example, not shown). Memory (stored in the auxiliary storage device and the main storage device of the measuring device 110).

Next, the thermometer characteristic information generation system W1 performs a reference temperature calculation process (S2).
In this reference temperature calculation process (S2), the thermometer characteristic calculation unit 113 of the measuring device 110 constituting the thermometer characteristic information generation system W1 is acquired by the data acquisition unit 112 and stored in association with each measurement time. Of the measured values (in-cylinder temperature (T'), in-cylinder pressure (P), air flow rate (n)), "in-cylinder pressure (P) and air flow rate (n)" are calculated by geometric calculation. The reference temperature (T) is calculated using the volume (V) of the engine cylinder 11 to be generated and the above-mentioned equation of state (PV = nRT) (the reference temperature (T) is calculated for each measurement time).

As described above, since it can be assumed that the engine cylinder 11 is in a substantially adiabatic state during in-cylinder compression, it is estimated that the calculated value (T) calculated by the equation of state becomes the true value (reference temperature). ing.

Further, in the thermometer characteristic calculation unit 113, "mechanical information (mechanical information such as shape and dimensions) of the engine cylinder 11 and the following (formula 2), (formula 3), (formula 4), (formula 4), (formula 2), (formula 3), (formula 4), Equation 5) and are set.
The volume of the engine cylinder 11 (volume (V (V (θ))) in the region above the piston 15 (upper in the figure)) is based on the mechanical information of the engine cylinder and the following (Equation 2), ( It is calculated by geometric calculation using the calculation formulas shown in Equation 3), (Equation 4), and (Equation 5).
[Number 2]

V: Cylinder volume [m ³ ]
L: Connecting rod length [m]
R: Crank radius [m]
Q: Total offset length [m]
Θ: Corrected crank angle [deg ATDC]
B: Bore diameter [m]
CR: Compression ratio
V _Disp : Displacement volume [m ³ ]
O _Pin : Piston pin offset with positive thrust direction [m]
O _Crank : Crank offset with positive thrust direction [m]

Further, since the air flow rate (n) acquired by the data acquisition unit 112 is a value [L / s] measured by the volume flow rate, the thermometer characteristic calculation unit 113 performs the following calculation and then sets the equation of state. The air flow rate (n) is substituted for. Specifically, the thermometer characteristic calculation unit 113 multiplies the value [L / s] of air diversion (n) measured by the volumetric flow rate by the density calculated from atmospheric pressure, atmospheric temperature, and humidity. After converting to mass flow rate [g / s], and then converting to air molecular weight (molar mass) 28.966 [g / mol], it is substituted into the state equation.

Next, the thermometer characteristic information generation system W1 performs a transfer function calculation process (S3).
In the calculation process (S3) of this transfer function, the reference temperature (T) calculated from the state equation by the thermometer characteristic calculation unit 113 of the measuring device 110 constituting the thermometer characteristic information generation system W1 as shown in FIG. Is used as the input value, and the in-cylinder temperature (T') measured by the thermometer 101 at the measurement time corresponding to the reference temperature (T) is used as the output value, and a Fourier analysis calculation is performed to perform the transfer characteristic (Gx'(Gx'(Gx') of the thermometer. s)) is calculated.
In the gain diagram of FIG. 4, an example of the transfer characteristic (Gx'(s)) obtained by the above Fourier analysis calculation is shown.

Further, in S3, the temperature characteristic calculation unit 113 fits the calculated transfer characteristic (Gx'(s)) with an arbitrary transfer function (Gx (s)) shown in the following (Equation 6) to obtain "Gx". The parameters (α, β) shown in (Equation 6) are identified so that ′ (s) = Gx (s) ”(see FIG. 3).
[Number 3]

Next, the thermometer characteristic information generation system W1 performs a calculation process of the regression transfer function (S4).
In the calculation process (S4) of this regression transfer function, the thermometer characteristic calculation unit 113 of the measuring device 110 constituting the thermometer characteristic information generation system W1 uses the transfer function (Gx (s)) calculated in S3. The regression transfer function (Gy (s)) shown in the following (Equation 7) is calculated.
The "Lowpass filter" has a characteristic that does not interfere with Gx (s) by using a filter with a cutoff set at a higher frequency than the Gx (s) band.
[Number 4]

In addition, the thermometer characteristic calculation unit 113 puts the “transfer characteristic (Gx'(s)) and the transfer function (Gx (s)) calculated in S3 into a memory (auxiliary storage device and main storage device of the measuring device 110) (not shown). ) ”And stored in the regression transfer function (Gy (s)) calculated in S4.

Subsequently, after the regression transfer function (Gy (s)) of the thermometer 101 is calculated, the temperature correction process performed by the thermometer characteristic information generation system W1 of the first embodiment will be described.

In this temperature correction process, first, in the performance test of the engine E installed on the engine bench 1, the data acquisition unit 112 of the measuring device 110 measures the inside of the cylinder measured by the thermometer 101 installed in the cylinder of the engine cylinder 11. Get the temperature (T').
Next, the temperature compensation unit 114 of the measuring device 110 reads out the "regression transfer function (Gy (s))" stored in a memory (auxiliary storage device and main storage device of the measuring device 110) (not shown) to acquire data. By applying the read "return transfer function (Gy (s))" to the in-cylinder temperature (T') acquired in the unit 112, the in-cylinder temperature (T') measured by the thermometer 101 is corrected in the cylinder. Correct to temperature (Th).

As described above, according to the thermometer characteristic information generation system W1 of the first embodiment, the thermometer characteristic information "transmission function (Gx (s)), regression" for enabling the thermometer to measure the temperature with high response. A transfer function (Gy (s)) ”can be generated. Therefore, for example, even in temperature measurement in an environment such as an engine test, it is possible to perform temperature measurement with a high response by correcting the measured value by the thermometer 101 using this regression transfer function (Gy (s)). can.

<< Second Embodiment >>
Next, the configuration of the thermometer characteristic information generation system according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 7.

Here, FIG. 5 is a schematic diagram showing the configuration of the thermometer characteristic information generation system of the second embodiment. Further, FIG. 6 is a flowchart showing a procedure of thermometer characteristic information generation processing of the thermometer characteristic information generation system of the second embodiment. FIG. 7 is a schematic diagram showing the input / output relationship of the transmission characteristics of the thermometer calculated by the thermometer characteristic information generation system of the second embodiment.
Of the configurations of the second embodiment, the same configurations (or equivalent configurations) as those of the first embodiment are designated by the same reference numerals to simplify or omit the description, and are mainly referred to as the first embodiment. The different contents will be explained in detail.

As shown in FIG. 5, the thermometer characteristic information generation system W2 of the second embodiment includes a pipe (circular pipe) 20 and supplies pressurized air to the pipe 20 to step the pressure inside the pipe 20. The pressure step response device Z to be changed, the thermometer (first thermometer) 101 that measures the temperature inside the pipe of the pipe 20 (the temperature inside the pipe (T')), and the pressure inside the pipe 20 (the pressure inside the pipe (P)). 102, a thermometer (second thermometer) 105 for measuring the pipe wall temperature (Tw) of the pipe 20, and a thermometer (third) for measuring the outside temperature (Tо). It has a thermometer) 106, a pressure gauge (second pressure gauge) 107 for measuring the outside pressure (Pо), and a measuring device 120 for calculating the thermometer characteristic information (transmission function, regression transmission function) of the thermometer 101. doing.

The pressure step response device Z includes a pipe (circular pipe) 20 penetrating both ends, a pressurized air supply device 30 that supplies pressurized air to the pipe 20, and one end side of the pipe 20 (flow of pressurized air). The first valve 21 installed in the pipe on the inlet side), the second valve 22 installed in the pipe on the other end side (outlet side of the pressurized air) of the pipe 20, and each valve (first and first). It is provided with a valve operating device 40 that controls the opening / closing operation of the two valves 21 and 22).

Further, the pressurized air supply device 30 is connected to one end of the pipe 20, and pressurized air of a predetermined pressure flows into the pipe of the pipe 20 from one end of the pipe 20.
Further, the pipe 20 has a first straight pipe portion 20a and a first straight pipe portion 20a which are connected to the pressurized air supply device 30 and extend in the first direction (Y direction in the drawing) as well as penetrating both ends. It is formed in a substantially L shape including a second straight pipe portion 20b that bends at a substantially right angle from the pipe and extends in a second direction (X direction in the drawing). Further, the outside of the pipe 20 has an atmospheric pressure.

Further, the two valves (first and second valves 21, 22) are provided in the second straight pipe portion 20b extending in the second direction of the pipe 20.
Specifically, the first valve 21 is provided on one end side (pressurized air supply device 30 side) of the second straight pipe portion 20b constituting the pipe 20. Further, the second valve 22 is provided at the other end of the second straight pipe portion 20b constituting the pipe 20, and when the second valve 22 is opened, the opening of the other end of the pipe 20 opens to the outside. Be released.

Further, the valve operating device 40 transmits an opening / closing control signal to the valves (first and second valves 21 and 22) to control the opening / closing states of the two valves (first and second valves 21 and 22). As a result, the pressurized air supplied from the pressurized air supply device 30 is confined between the two valves (first and second valves 21, 22), and then the open / closed state of the second valve 22 is controlled. , The pressure of the pressurized air (fluid) of the pipe 20 is changed in steps.

The measuring device 120 was measured by the sensors (thermometer 101, pressure gauge 102) while the pressure step response device Z was changing the pressure of the pressurized air (fluid) of the pipe 20 in a stepped manner. Acquire the measured values (in-pipe temperature (T'), in-pipe pressure (P)) in the pipe of the pipe 20. Further, in the measuring device 120, while the pressure step response device Z is changing the pressure of the pressurized air (fluid) of the pipe 20 in a stepped manner, the sensors (thermometer 105, thermometer 106, pressure gauge 107). The measured values (tube wall temperature (Tw), outside temperature (Tо), outside pressure (Pо)) measured by the sensor are acquired from.
Further, the measuring device 120 uses the simulation condition information described later and the acquired "tube wall temperature (Tw), outside temperature (Tо), outside pressure (Pо)" for simulation using one-dimensional fluid analysis ( A thermo-fluid model flowing through the pipe 20 is generated by computer simulation), and the true value (reference) of the temperature inside the pipe 20 is used by using the pipe pressure (P) measured by the pressure gauge 101 and the thermo-fluid model generated by the simulation. Temperature (T)) is calculated. Further, the measuring device 110 uses the true value of the temperature inside the pipe 20 calculated by simulation (reference temperature (T)) and the temperature inside the pipe measured by the thermometer 101 (T')) to provide thermometer characteristic information. (Transfer function, regression transfer function) is calculated.

The thermometer 101 is installed near the first valve 21 on the inlet side of the pressurized air and near the wall / vicinity of the pipe 20, and the flow velocity is near "0 (m / s)" (Reynolds). It is possible to measure the temperature (points where the number is 2000 or less).
In this way, "flow velocity = 0 (m / s)" and "flow velocity> 0 (m / s)" are mixed at points other than those where the flow velocity is near "0 (m / s)". This is because the measured values are obtained, which makes it impossible to perform fluid analysis with high accuracy in the simulation.
Further, in the illustrated example, the pressure gauge 102 is installed in the vicinity of the first valve, but this is only an example. The pressure gauge 102 may be installed at a position between two valves (first and second valves 21, 22) in the pipe of the pipe 20.
Further, the thermometer 105 is installed on the outer peripheral side surface of the pipe 20 and at a position between the first valve 21 and the second valve 22, and is set so that the pipe wall temperature (Tw) of the pipe 20 can be measured. There is. Further, the thermometer 106 and the pressure gauge 107 are installed at an external position of the pipe 20 (for example, an arbitrary position in the test room where the thermometer characteristic information generation system W2 is installed), and the outside air temperature (Tо). , It is set so that the outside air pressure (Pо) can be measured.

Next, the functional configuration of the measuring device 120 constituting the thermometer characteristic information generation system W2 of the second embodiment will be described.
The measuring device 120 includes a control unit 111, a data acquisition unit 112, a fluid analysis processing unit 121, a thermometer characteristic calculation unit 122, and a temperature correction unit 114.
Since the control unit 111 and the temperature correction unit 114 are the same as those in the first embodiment, the description thereof will be omitted.

The hardware configuration of the measuring device 120 is not particularly limited, but like the measuring device 110 of the first embodiment, the measuring device 120 includes, for example, a CPU, an auxiliary storage device, a main storage device, a network interface, and an input / output interface. It can be configured by a built-in computer (one or a plurality of computers). In this case, each sensor (thermometer 101, pressure gauge 102, thermometer 105, thermometer 106, pressure gauge 107) is connected to the input / output interface. Further, the auxiliary storage device stores a program for realizing the functions of "control unit 111, data acquisition unit 112, fluid analysis processing unit 121, temperature characteristic calculation unit 122, and temperature correction unit 114". Then, the function of "control unit 111, data acquisition unit 112, fluid analysis processing unit 121, temperature characteristic calculation unit 122 and temperature correction unit 114" is executed by the CPU loading the program into the main storage device. Is realized by.

The data acquisition unit 112 has measured values (in-pipe temperature (T'), in-pipe pressure) measured by each sensor (thermometer 101, pressure gauge 102, thermometer 105, thermometer 106, pressure gauge 107) at a predetermined measurement timing. (P), tube wall temperature (Tw), outside temperature (Tо), outside pressure (Pо)) are acquired.

Further, in the fluid analysis processing unit 121, simulation condition information is set in the processing in the previous stage of the thermometer characteristic information generation processing (in the processing in the previous stage, the measurement device 120 stores the simulation condition information. There is).
This simulation condition information includes dimensional information of the pipe 20 (dimensional information such as thickness, length, and diameter), composition information of air flowing into the pipe 20, initial pressure in the pipe 20, and initial pressure. It includes the temperature and valve information indicating the flow path resistance of the valves (first valve 21, second valve 22). The flow path resistance of the above valve is identified from the pressure behavior.
Then, the fluid analysis processing unit 121 connects the pipe 20 by simulation by one-dimensional fluid analysis processing using "simulation condition information" and "tube wall temperature (Tw), outside air temperature (Tо), outside pressure (Pо)". Generate a flowing thermo-fluid model (mathematical thermo-fluid model). The tube wall temperature (Tw), outside air temperature (Tо), and outside air pressure (Pо) are used as boundary conditions for the thermo-fluid model.
Further, the fluid analysis processing unit 121 uses the “in-pipe pressure (P) measured by the pressure gauge 101” acquired by the data acquisition means 112 and the thermo-fluid model generated by the simulation to be true of the temperature inside the pipe 20. Calculate the value (reference temperature (T)).

The function of the fluid analysis processing unit 121 is realized by commercially available "computer simulation software using one-dimensional fluid analysis processing". For example, the function of the fluid analysis processing unit 121 is realized by "GT-POWER" developed by "Gamma Technologies, Inc. of the United States". Further, since the function of the fluid analysis processing unit 121 is a well-known technique, detailed description thereof will be omitted, but the calculation is executed by simultaneously using the equations of momentum, energy, etc. using Navier-Stokes as an equation. Further, as a one-dimensional analysis, discretization is performed only in the direction of the fluid flow, and the calculation is performed assuming that physical quantities such as pressure, flow velocity, and temperature are not distributed in the cross section.

Further, the thermometer characteristic calculation unit 122 uses the reference temperature (T) calculated by the fluid analysis processing unit 121 and the in-pipe temperature (T') acquired by the data acquisition unit 112 to perform a thermometer transfer function (Gx (s). )) Is calculated. Further, the regression transfer function (Gy (s)) is generated and stored from the temperature characteristic calculation unit 113 and its transfer function (Gx (s)).

Next, the procedure of the thermometer characteristic information generation process performed by the thermometer characteristic information generation system W2 of the second embodiment will be described with reference to FIGS. 6 to 7.

As shown in FIG. 6, first, the thermometer characteristic information generation system W2 performs the data measurement process (S11).
In this data measurement process (S11), the pressure step response device Z is driven to change the pressure of the pressurized air (fluid) in the pipe 20 in a stepped manner. Specifically, the valve operating device 40 of the pressure step response device Z drives the pressurized air supply device 30 with the first valve 21 "open" and the second valve 22 "closed". The pressurized air is allowed to flow into the pipe 20 for a predetermined time. Further, the valve operating device 40 closes the first valve 21 after a lapse of a predetermined time, and supplies the fluid from the pressurized air supply device 30 between the two valves (first and second valves 21, 22). Confine the pressurized air (fluid). After that, the valve operating device 40 controls the open / closed state of the second valve 22 to change the pressure of the pressurized air (fluid) in the pipe 20 in steps.
Further, the data acquisition unit 112 of the measuring device 120 is changing the pressure of the pressurized air (fluid) of the pipe 20 in a stepwise manner, and the temperature inside the pipe 20 (T') measured by the thermometer 101. And the in-pipe pressure (P) of the pipe 20 measured by the thermometer 102 are acquired. Further, in the data acquisition unit 112, while the pressure step response device Z is changing the pressure of the pressurized air (fluid) of the pipe 20 in steps, the sensors (thermometer 105, thermometer 106, pressure gauge 107). ), The sensor measures (tube wall temperature (Tw), outside temperature (Tо), outside pressure (Pо)).
The data acquisition unit 112 has acquired measured values (tube temperature (T'), tube pressure (P), tube wall temperature (Tw), outside air temperature (Tо), outside pressure (Pо)) for each measurement time. (For example, stored in a memory (auxiliary storage device and main storage device of the measuring device 110) (not shown)).

Next, the thermometer characteristic information generation system W2 performs a reference temperature calculation process (S12).
In this reference temperature calculation process (S12), the fluid analysis processing unit 121 of the measuring device 120 performs preset “simulation condition information (dimension information of the pipe 20, composition information of air flowing into the pipe, inside the pipe 20). (Initial pressure and initial temperature, valve information) ”and“ Pipe wall temperature (Tw), outside temperature (Tо), outside pressure (Pо) ”acquired in S11 by simulation by one-dimensional fluid analysis processing. A thermo-fluid model flowing through the pipe 20 is generated. Further, the fluid analysis processing unit 121 uses the “in-pipe pressure (P) measured by the pressure gauge 102” acquired by the data acquisition means 112 and the thermo-fluid model generated by the simulation to be true of the temperature inside the pipe 20. The temperature (T) of the thermo-fluid model is calculated as the value (reference temperature (T)).

The reason why the temperature (T) of the thermo-fluid model generated by the simulation is used as the true value (reference temperature (T)) of the temperature in the pipe 20 in S12 is as follows.
The thermometer 101 and the pressure gauge 102 are installed at a point where the flow velocity is close to "0 (m / s)" (a point where the Reynolds number is 2000 or less), and Nusselt contributes to the heat transfer coefficient at this point. It can be estimated that the Nusselt number Nu = 3.66 (Constant (constant)) under the laminar flow condition in the cylindrical tube.
Therefore, the Nusselt number Nu is finely adjusted at the point where the temperature responsiveness measured by the thermometer 101 is loose, and the measured value is matched with the thermo-fluid model. Since the same phenomenon occurs at the point where the pressure changes, the Nusselt number Nu becomes the same value, and the heat transfer coefficient is extrapolated. That is, the temperature (T) of the thermo-fluid model generated by the simulation can be treated as the true value (reference temperature (T)) of the temperature inside the pipe 20.

Next, the thermometer characteristic information generation system W2 performs a transfer function calculation process (S13).
In the calculation process (S13) of this transfer function, the thermometer characteristic calculation unit 122 of the measuring device 120 inputs the reference temperature (T) calculated by using the thermo-fluid model of the simulation in S12 as shown in FIG. Then, a Fourier analysis calculation is performed using the in-tube temperature (T') measured by the thermometer 101 at the measurement time corresponding to the reference temperature (T) as an output value, and the transfer characteristic (Gx'(s)) of the thermometer is obtained. calculate. Further, in S13, the temperature characteristic calculation unit 122 fits the calculated transfer characteristic (Gx'(s)) with an arbitrary transfer function (Gx (s)), and "Gx'(s) = Gx (s). ) ”, The parameters (α, β) of the transfer function (Gx (s)) are identified.
Since the process of S13 is the same procedure as the process of S3 of the first embodiment described above, detailed description thereof will be omitted.

Next, the thermometer characteristic information generation system W2 performs a regression transfer function calculation process in the same procedure as the process of S4 of the first embodiment described above (S14).
In the calculation process (S14) of the regression transfer function, the thermometer characteristic calculation unit 122 of the measuring device 120 uses the transfer function (Gx (s)) calculated in S13 to generate the regression transfer function (Gy (s)). Calculate (see (Equation 7) shown in the first embodiment).

As described above, in the thermometer characteristic information generation system W2 of the second embodiment, the regression transfer function (Gy (s)) of the thermometer 101 can be obtained as in the first embodiment described above, so that it is similar to the engine test. Even in temperature measurement in such an environment, temperature measurement can be performed with high response by correcting the measured value by the thermometer 101 using this regression transfer function (Gy (s)).

Further, in the thermometer characteristic information generation system W2 of the second embodiment, unlike the first embodiment, the pressure in the pipe 20 is pressurized by the pressure step response device Z provided with the pipe 20 without using the actual engine E. A physical environment that changes the pressure of air (fluid) in steps is created, and the temperature (T') and pressure (P) under the physical environment are measured.

Specifically, in the second embodiment, a thermo-fluid model of pressurized air (fluid) flowing through the pipe 20 of the pressure step response device Z is generated by simulation by one-dimensional fluid analysis processing (pipe by computer simulation). (Reproduce the thermo-fluid of pressurized air (fluid) flowing through 20), calculate the temperature of the thermo-fluid model from the measured pressure in the pipe (P) and the thermo-fluid model, and set the temperature to the true value (reference temperature (T)). It is supposed to be. Then, in the second embodiment, the thermometer characteristic information (transfer function, regression transfer function) of the thermometer 101 is calculated using the reference temperature (T) and the actually measured in-pipe temperature (T').
That is, in the second embodiment, it is not necessary to use the engine E as in the first embodiment, so that the thermometer characteristic information can be obtained by using space-saving and simple equipment at a lower cost than in the first embodiment. (Transfer function, regression transfer function) can be calculated. As a result, in the second embodiment, it is possible to improve the response of the temperature measurement of the thermometer 101 with simple equipment that can be realized in a small space and at low cost.

<< Modified example of the second embodiment >>
Next, the configuration of a modified example of the thermometer characteristic information generation system of the second embodiment of the present invention will be described with reference to FIG.

Here, FIG. 8 is a schematic diagram showing the system configuration of the thermometer characteristic information generation system of the modified example of the second embodiment.
Of the configurations of the modified examples of the second embodiment, the same configurations (or equivalent configurations) as those of the first and second embodiments are designated by the same reference numerals to simplify or omit the description, and mainly, The parts different from the first and second embodiments will be described.

The thermometer characteristic information generation system W2'of the modified example of the second embodiment is different from that of the second embodiment described above in that the configuration of the pipe 20 is modified and that the valves (first valve 21, second valve 22) are used. The position is changed, and the installation positions of the thermometer 101 and the pressure gauge 102 are changed.

Specifically, as shown in FIG. 8, the thermometer characteristic information generation system W2'of the modified example of the second embodiment includes a pipe (circular pipe) 20 and supplies pressurized air to the pipe 20. A pressure step response device Z that changes the pressure inside the pipe of the pipe 20 in steps, a thermometer 101 that measures the temperature inside the pipe 20 (inside the pipe (T')), and the pressure inside the pipe 20 (inside the pipe). A pressure meter 102 that measures the pressure (P)), a thermometer 105 that measures the tube wall temperature (Tw) of the pipe 20, a thermometer 106 that measures the outside temperature (Tо), and an outside pressure (Pо). It has a pressure meter 107 and a measuring device 120 for calculating thermometer characteristic information (transmission function, regression transfer function) of the thermometer 101.

In the modified example of the second embodiment, the pipe 20 is connected to the first straight pipe portion 20c extending in the first direction (Y direction in the drawing) and the other end of the first straight pipe portion 20c. Further, it is provided with a second straight pipe portion 20d extending in a second direction (X direction in the drawing) perpendicular to the first straight pipe portion 20c.

Further, both ends of the first straight pipe portion 20c penetrate, and one end portion (lower end portion in the drawing) is connected to the pressurized air supply device 30, and a predetermined pressure is applied from the pressurized air supply device 30 into the pipe. Pressurized air is supplied. Further, the other end portion (upper end portion in the drawing) of the first straight pipe portion 20c is connected to the "side surface on the other end side of the second straight pipe portion 20d", and the inside of the first straight pipe portion 20c. And the inside of the second straight pipe portion 20c communicate with each other.
Further, the second straight pipe portion 20d has a closed surface 20d1 in which one end is closed, and the other end is open. Then, the pressurized air from the pressurized air supply device 30 flows into the pipe of the second straight pipe portion 20d via the first straight pipe portion 20c.

The first valve 21 is provided in the pipe of the first straight pipe portion 20c constituting the pipe 20.
Further, the second valve 22 is provided in the pipe at the other end of the second straight pipe portion 20d constituting the pipe 20, and can open and close the opening at the other end.

Further, the thermometer 101 is installed in the vicinity of the sealing surface 20d1 on the one end side of the second straight pipe portion 20d (near the wall surface). Further, the pressure gauge 102 is installed on one end side of the second straight pipe portion 20d.
The thermometer 101 was installed at such a position in the pipe 20 at a point where the flow velocity is closer to "0 m / s" than in the second embodiment shown in FIG. This is so that the temperature of the can be measured. In the illustrated example, the pressure gauge 102 is installed on one end side of the second straight pipe portion 20d, but this is an example and does not limit the installation position.

Further, in the modified example of the second embodiment, the thermometer characteristic information generation process is performed according to the same procedure as that of the second embodiment of FIG. 6 described above. In the data measurement process, the pressure of the pressurized air (fluid) in the pipe 20 is changed in steps as follows.

Specifically, the valve operating device 40 of the pressure step response device Z drives the pressurized air supply device 30 with the first valve 21 "open" and the second valve 22 "closed". The pressurized air is allowed to flow into the pipe 20 for a predetermined time. Further, the valve operating device 40 closes the first valve 21 after a lapse of a predetermined time. As a result, between the first valve 11 of the first straight pipe portion 20c, the sealing surface 20d1 at one end of the first straight pipe portion 20d, and the second valve 22 at the other end of the first straight pipe portion 20d. Pressurized air (fluid) supplied from the pressurized air supply device 30 is confined in the formed region. After that, the valve operating device 40 controls the open / closed state of the second valve 22 to change the pressure of the pressurized air (fluid) in the pipe 20 in steps.
Then, as in the second embodiment described above, the data acquisition unit 112 of the measuring device 120 was measured by the thermometer 101 while the pressure of the pressurized air (fluid) of the pipe 20 was being changed in steps. The pipe temperature (T') of the pipe 20, the pipe pressure (P) of the pipe 20 measured by the pressure gauge 102, the pipe wall temperature (Tw) measured by the thermometer 105, and the outside temperature (Tw) measured by the thermometer 106. Tо) and the external pressure (Pо) measured by the thermometer 107 are acquired.

As described above, even in the modified example of the second embodiment, the same action and effect as those of the above-described second embodiment can be obtained.
Further, in the modified example of the second embodiment, the temperature and pressure inside the pipe 20 can be measured at a point where the flow velocity is closer to "0 m / s" as compared with the second embodiment, and therefore, as compared with the second embodiment. Therefore, it is possible to more accurately calculate the thermometer characteristic information (transfer function, regression transfer function) for correcting the measured value (T') measured by the thermometer 101.

As described above, according to the embodiment of the present invention and its modification, the thermometer characteristic information generation system and the thermometer characteristic information generation system for generating the thermometer characteristic information for enabling the thermometer 101 to measure the temperature with high response. A method for generating thermometer characteristic information can be provided.

The present invention is not limited to the above-described embodiments and modifications thereof, and various modifications can be made within the scope of the gist thereof.

W1, W2, W2'... Thermometer characteristic information generation system 101 ... Thermometer 102 ... Pressure gauge 103 ... Flow meter 105 ... Thermometer 106 ... Thermometer 107 ... Pressure gauge 110, 120 ... Measuring device 111 ... Control unit 112 ... Data Acquisition unit 113 ... Thermometer characteristic calculation unit 114 ... Temperature correction unit 121 ... Fluid analysis processing unit 122 ... Thermometer characteristic calculation unit
1 ... Engine bench 10 ... Dynamometer 11 ... Dynamo control device 15 ... Shaft
E ... Engine 3 ... Intake manifold 5 ... Intake pipe (intake pipe)
7 ... Throttle valve 9 ... Discharge pipe 11 ... Engine cylinder
Z ... Pressure step response device 20 ... Piping 20a, 20c ... First straight pipe portion 20b, 20d ... Second straight pipe portion 20d1 ... Sealing surface 21 ... First valve 22 ... Second valve 30 ... Pressurized air supply device 40 ... Valve operating device

Claims (8)

1. A thermometer that measures the in-cylinder temperature of the engine cylinder of the engine installed in the engine test device, a pressure meter that measures the in-cylinder pressure of the engine cylinder, and a flow meter that measures the flow rate of air flowing into the engine cylinder. And a thermometer characteristic information generation system equipped with a measuring device that calculates thermometer characteristic information.
   The measuring device is
   While the engine test device is performing a compression operation by flowing air into the engine cylinder without burning the engine, the cylinder temperature measured by the thermometer and the cylinder measured by the pressure gauge. A data acquisition unit that acquires the internal pressure and the air flow rate measured by the thermometer,
   Using the ideal gas state equation stored in advance and the acquired in-cylinder pressure and air flow rate, the reference temperature is calculated as the true value of the temperature inside the engine cylinder, and the reference temperature and the acquired cylinder are used. A thermometer characteristic information generation system including a thermometer characteristic calculation unit that calculates a transmission function of the thermometer as the thermometer characteristic information using the internal temperature.
2. The thermometer characteristic calculation unit calculates the transmission characteristics of the thermometer by performing a Fourier analysis calculation using the reference temperature as an input value and the in-cylinder temperature measured by the thermometer corresponding to the reference temperature as an output value. The thermometer characteristic information generation system according to claim 1, wherein the transfer function is calculated from the calculated transfer characteristics.
3. The thermometer characteristic calculation unit calculates a regression transfer function from the calculated transfer function.
   The thermometer characteristic information generation system according to claim 1 or 2, wherein the measuring device has a temperature compensating unit that corrects a measured value measured by the thermometer using the regression transfer function. ..
4. A pipe equipped with a first valve and a second valve is provided, and pressurized air is supplied to the pipe, and the opening / closing operation of the first and second valves is controlled to change the pressure in the pipe of the pipe in a stepwise manner. A pressure step response device to be operated, a first thermometer for measuring the pressure inside the pipe, a first pressure gauge for measuring the pressure inside the pipe, and a second thermometer for measuring the pipe wall temperature of the pipe. A thermometer characteristic information generation system including a third thermometer for measuring the outside temperature, a second pressure gauge for measuring the outside pressure, and a measuring device for calculating the thermometer characteristic information.
   The measuring device is
   Simulation condition information including dimensional information of the pipe, composition information of the pressurized air, initial pressure and initial temperature in the pipe of the pipe, and valve information indicating the flow path resistance of the first and second valves. As well as remembering
   While the pressure step response device is changing the pressure of the pipe in a step-like manner, the pipe temperature measured by the first thermometer, the pipe pressure measured by the first thermometer, and the second temperature. A data acquisition unit that acquires the tube wall temperature measured by the meter, the outside temperature measured by the third thermometer, and the outside pressure measured by the second pressure meter.
   A thermo-fluid model flowing through the pipe was generated by a simulation using the simulation condition information and a one-dimensional fluid analysis using the acquired pipe wall temperature, outside temperature, and outside pressure, and the acquired pipe pressure and the pressure inside the pipe were obtained. Using the thermo-fluid model generated by the simulation, a fluid analysis processing unit that calculates the reference temperature as the true value of the temperature inside the pipe, and
   A thermometer characteristic information generation system including a thermometer characteristic calculation unit that calculates a transmission function of the thermometer as the thermometer characteristic information using the calculated reference temperature and the acquired tube temperature.
5. The pressure step response device includes a pressurized air supply device that supplies pressurized air to the pipe, and a valve operating device that controls the opening / closing operation of the first and second valves.
   The first valve is installed on one end side of the pipe, and the second valve is installed on the other end side of the pipe.
   By controlling the open / closed state of the first and second valves, the valve operating device traps the pressurized air supplied from the pressurized air supply device between the first and second valves, and then traps the pressurized air supplied from the pressurized air supply device. The temperature characteristic information generation system according to claim 4, wherein the open / closed state of the second valve is controlled to change the pressure of the pressurized air in the pipe in a stepwise manner.
6. The pressure step response device includes a pressurized air supply device that supplies pressurized air to the pipe, and a valve operating device that controls the opening / closing operation of the first and second valves.
   The pipe is connected to a first straight pipe portion extending in the first direction and the other end of the first straight pipe portion, and extends in a direction perpendicular to the first straight pipe portion. Equipped with a second straight pipe section
   Both ends of the first straight pipe portion penetrate, one end thereof is connected to the pressurized air supply device, and the other end portion is connected to the side surface of the second straight pipe portion on the other end side.
   The second straight pipe portion has a closed surface in which one end is closed and the other end is open.
   The first valve is installed in the first straight pipe portion and is installed.
   The second valve is installed at the other end of the second straight pipe portion so as to be able to open and close the opening of the other end portion.
   The thermometer is installed in the vicinity of the sealing surface on the one end side of the second straight pipe portion.
   The valve operating device controls the open / closed state of the first and second valves to form a region between the first and second valves and the sealing surface of one end of the second straight pipe portion. , The pressurized air supplied from the pressurized air supply device is confined, and then the open / closed state of the second valve is controlled to change the pressure of the pressurized air in the pipe in a stepwise manner. The temperature characteristic information generation system according to claim 4, wherein the temperature characteristic information generation system is provided.
7. A thermometer that measures the in-cylinder temperature of the engine cylinder of the engine installed in the engine test device, a pressure meter that measures the in-cylinder pressure of the engine cylinder, and a flow meter that measures the flow rate of air flowing into the engine cylinder. And a thermometer characteristic information generation method using a measuring device that calculates thermometer characteristic information.
   A step in which the engine test device causes air to flow into the engine cylinder to perform a compression operation without burning the engine.
   While the measuring device is causing air to flow into the engine cylinder to perform a compression operation, the in-cylinder temperature measured by the thermometer, the in-cylinder pressure measured by the pressure gauge, and the flow meter Steps to get the measured air flow rate and
   Using the ideal gas state equation stored in advance by the measuring device and the acquired in-cylinder pressure and air flow rate, the reference temperature is calculated as the true value of the temperature inside the engine cylinder, and the reference temperature is calculated. A method for generating thermometer characteristic information, which comprises executing a step of calculating a transmission function of the thermometer as the thermometer characteristic information using the acquired in-cylinder temperature.
8. A pipe equipped with a first valve and a second valve is provided, and pressurized air is supplied to the pipe, and the opening / closing operation of the first and second valves is controlled to change the pressure in the pipe of the pipe in a stepwise manner. A pressure step response device to be operated, a first thermometer for measuring the pressure inside the pipe, a first pressure gauge for measuring the pressure inside the pipe, and a second thermometer for measuring the pipe wall temperature of the pipe. It is a thermometer characteristic information generation method using a third thermometer for measuring the outside temperature, a second pressure gauge for measuring the outside pressure, and a measuring device for calculating the thermometer characteristic information.
   The measuring device includes dimensional information of the pipe, composition information of the pressurized air, initial pressure and initial temperature in the pipe of the pipe, and valve information indicating the flow path resistance of the first and second valves. Simulation condition information including is stored,
   A step in which the pressure step response device changes the pressure in the pipe of the pipe in a stepwise manner, and
   While the pressure in the pipe of the pipe is changing in steps, the measuring device has the pipe temperature measured by the first thermometer, the pipe pressure measured by the first thermometer, and the second. A step of acquiring the tube wall temperature measured by the thermometer, the outside air temperature measured by the third thermometer, and the outside atmospheric pressure measured by the second pressure gauge.
   The measuring device generates a thermo-fluid model flowing through the pipe by a simulation using the simulation condition information and a one-dimensional fluid analysis using the acquired pipe wall temperature, outside temperature and outside pressure, and obtains the above. A step of calculating the reference temperature as the true value of the temperature of the fluid in the pipe by using the pressure inside the pipe and the thermo-fluid model generated by the simulation.
   A method for generating thermometer characteristic information, wherein the measuring device executes a step of calculating a transfer function of the thermometer as the thermometer characteristic information using the calculated reference temperature and the acquired tube temperature. ..
   
   
   

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