JPH01211087A - On-line data acquiring/processing system using electric calibrating box - Google Patents

Abstract

PURPOSE:To minimize an erroneous setting and an input error due to a human- initiated operation by generating calibration data by an electric calibrating box, correcting measured data by the calibration data, and executing processing based on a data processing coefficient. CONSTITUTION:For an electric calibrating box 5 provided near a sensor bridge 1, its switch is actuated by a digital/output signal SO sent from a CPU for every test, calibrating resistances 2 are connected to one arm of the bridge 1 in parallel, calibration voltage is generated, and the voltage is read by the CPU as information A/I to represent the transmission characteristics of a measuring system. Thereafter, the measured data are corrected by the calibration data, and the processing based on the data processing coefficient indexed from a memory table additionally provided to the CPU. Thus, an operation procedure in a measuring preparing period can be executed by software, and the erroneous setting and the input error due to the human-initiated operation can be minimized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to the general DI field that uses bridge-type sensors, and is particularly applicable to wind tunnel tests for developing flying objects such as aircraft and rockets. The present invention relates to an on-line data acquisition/processing system using an electrical calibration box suitable for data measurement systems in the field.

[Conventional technology] There is no particular prior art.

[Problem to be solved by the invention] A simple method for combining a gauge bridge type sensor and a voltage generation type sensor with a commercially available distortion amplifier, a DC amplifier, and a CPU having an analog/digital (hereinafter abbreviated as A/D) conversion function. Assuming that a wind tunnel test is conducted using a measurement system with a single configuration, the following problems arise.

(1) Adjustment of the measurement system is complicated, and tests and wind tunnels are required.

Adjustment and setting of model conditions and input of the results to the CPU are concentrated immediately before the test.

(2) Since most of the steps in (1) above are performed manually, incorrect settings and input errors are likely to occur, resulting in an increase in test preparation man-hours.

(3) Since the calibration voltage for correcting the transmission system is generated by a standard bridge built into the distortion amplifier, it is not necessary to transmit the entire system (especially in wind tunnel tests, the cable length between the sensor and amplifier generally reaches several 107 IL). It is not representative of the characteristics.

If complete accuracy control is aimed at, the wind tunnel test will be suspended and the sensor calibration will be performed using a measurement system that completely matches the test measurement, which will reduce the wind tunnel operating rate.

Therefore, the present invention provides an online data acquisition/processing system using an electrical calibration box that reduces incorrect settings and input errors caused by human operations, and can greatly shorten floating time when conducting wind tunnel tests, for example. The purpose is to provide

[Means for Solving the Problems] In order to solve the above problems and achieve the objects, the present invention takes the following measures. In other words, automatic measurement DI of test data
/In a processing system, a transfer means for transferring measurement/processing conditions, etc. to the information CPU, a means for indexing data processing coefficients from a memory table attached to the CPU, and an electric calibration box generate calibration data. and means for correcting the measured data using the calibration data and performing processing based on the data processing coefficients.

[Effect] By studying these methods, the operating procedures during the measurement preparation period will be greatly softened, and the manual operations will be organized and simplified, and the manual operations will be reduced. Misoperations and input errors are reduced.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 7.

(1) Electrical calibration box (see FIG. 1) The electric calibration box 5 installed near the sensor bridge 1 is configured as follows.

The SWI, S
W2 is activated, a calibration resistor 2 is connected in parallel to one side of the bridge 1, a calibration voltage is generated, and this is read into the CPU as information A/I representative of the transmission characteristics of the measurement system.

However, in the voltage generation type sensor, the calibration voltage corresponding to the full range is switched and transmitted depending on the generation timing of the D/φ signal SO.

Note that the adjustment of the measuring instrument only needs to be adjusted so that the positive and negative calibration voltages are at a level that does not exceed the maximum allowable A/D conversion value, which greatly reduces the adjustment time.

On the other hand, as the calibration resistor 2, it is 1500.10 in terms of distortion amount.
There are six resistance values corresponding to 0.00.750, 500, 250, and 0 (microstrain), which are selected by the ATT switching rotary switch 3.

The identification code for selecting this calibration resistor 2 is C.
D/φ signal S1 from PU, rotary switch 3,
It is converted into transfer bits S2 by a digital/input multiplexer (hereinafter referred to as D/I MPX) system consisting of a binary code decimal (hereinafter referred to as BCD) matrix 4 and is sequentially input to the CPU.

(2) D/I MPX (See Figure 2) The control console 6 shown in Figure 2 generates an identification signal S2 for selecting and switching wind tunnel test measurement processing conditions in conjunction with the calibration resistance selection switch of the electrical calibration box 5. , which are sequentially transferred to the CPU as transfer bits.

In this way, when the corresponding address D/φ signal S1 is sent from the CPU, the row of contact signal groups in the electrical calibration box 5 specified by this signal S1 is changed to B, C, C, etc. in the control console 6.
D, encoded by matrix 4, transfer bit S
It is read into the CPU as 2. This read transfer bit is filed at the corresponding address position in the common area within the CPU.

(3) Trigger code and memory table (see Figure 3) The functional outline is as shown in Figure 3. In other words, various coefficients M and N are stored in advance in the "memory table" in the magnetic disk 10 by card input for coefficients that do not change much, and by online verification for coefficients that change almost regularly. File for each test and model production. Then, using the trigger code shown in Table 1 as necessary, the corresponding coefficient shown in Table 2 is indexed from the memory table of the magnetic disk 10 as shown in R1 and R2, and when ventilation is performed, the coefficient shown in Table 2 is indexed to the common area 11. coefficient chi
- When picking, Character/ D1sply or less C
/D) is a system that sets up the screen 12. Note that FIG. 4 is a schematic diagram of the test code in Table 1.

According to this system, it is possible to automatically index and set a huge amount of various coefficients by inputting a trigger code with a small number of values, which contributes to eliminating errors caused by human intervention and reducing preparation man-hours.

Table 1 Table 2 (4) Verification and data processing (see FIG. 5) Verification is performed to determine the physical ff1A corresponding to the calibration width KH in FIG. On the other hand, the measurement process calculates a total of 11111 physical quantities Aa from the ratio of the measured value KS to the calibration width KH. In other words, physical transformation! Coefficient B and measured physical quantity A
a is (B-(test weight W/test output P) × (calibration width KH)...■Aa-
(Measurement output KS/calibration width KH) × (physical conversion coefficient B) ・・・■ ′
Here, in the test/certification, the calibration width KH is the common base, and this calibration width KH depends on the calibration resistance 2.
Therefore, the subsequent amplifiers, A/D converters, etc.
It has nothing to do with the total n1 system.
rI Therefore sensor calibration verification involves wind tunnel testing.
It can be done at any time without any hassle, and it is effective in terms of quality control.
It also does not affect the wind tunnel operating rate.
iIn addition, the difference in calibration range in testing/certification (at the time of certification;
-1000 (microstrain))
The above formula ■ is
Aa=ATT ratio (measurement output KS/calibration width KH) x physical conversion coefficient...■. Here, the ATT ratio is based on the identification code of the calibration resistor (see Fig. 1) transferred by the D/I MPX (see Fig. 2).
This is a coefficient indexed from the memory table (third threshold, see Table 2), by which the gain of the total/lPJ transmission system is corrected.

(5) Main program (Figures 6 and 7) Figures 6 and 7 outline the main program that summarizes measurement preparation, testing, data processing, and data output for the wind tunnel test. As shown in the figure, dynamic interrupts 21, 22,
27, 28 and C/D pictures (J23-26 "key-in" calls various articles and sets various coefficients and control statements in the common area based on the conditions, and measurement preparation is completed. Then, "ventilation" is reached, and calibration and a total of n1 data bases are obtained.Furthermore, after the pressure regulation is stopped, final data is obtained, and door-to-door processing is performed based on the concept shown in Fig. 5, and the processing result is C. /D display, printing out of number 3 diagrams, etc. are all performed in accordance with the procedures guarded by the software routine.The features of the above main program are as shown below.

(1) The manual interrupt SW and C/D screen are arranged according to the preparation operation procedure, and especially the manual interrupt switch is L.
GET (i) 2g, AND circuit 29 prevents midway interrupts and skips.

Note that on the C/D screen, the "enter" after the input condition "key-in" also serves as an interrupt to the next stage. Therefore, there is little room for operator errors to occur.

(2) The C/D screen is displayed at each turning point of each operation, making it possible to visually check the condition setting status in the CPU.

(3) The rP3000J screen 23 displays the transfer results by D/IMPX, and the rP2000J 2
3. rP 2010J 25 holds the conditions of the previous test. On the other hand rP3010J 24
The standard values are automatically indexed (see Table 2) using the trigger code. Therefore, the number of re-key-ins associated with changing conditions for each test is small, and the burden on the operator is light.

(4) During calibration, test data can always be processed under the same conditions as during sensor calibration verification, depending on the ATT ratio.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the present invention, the operating procedures during the IPL preparation period are greatly softened, and the manual operation part is organized and simplified, so that incorrect settings and input errors caused by manual operation are avoided. It is possible to provide an online data acquisition/processing system using an electrical calibration box, which can greatly reduce floating time when performing wind tunnel tests, for example.

[Brief explanation of the drawing]

1 to 7 show one embodiment of the present invention, FIG. 1 is a schematic diagram showing the function of the electrical calibration box, and FIG. 2 is a D/I
Flowchart showing the transfer status by MPX, Figure 3 is a diagram showing the functions of the trigger code and memory table, Figure 4 is a schematic diagram of the test code, Figure 5 is a diagram showing calibration during certification/test, Figure 6 FIG. 7 and FIG. 7 are flowcharts showing the main program when performing a total of 7111 preparations and tests. 1...Sensor bridge, 2...Calibration resistor, 3...
ATT switching rotary switch, 4... BCD matrix, 5... electrical calibration box, 6... control console. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a system that automatically measures and processes test data, there is provided a transfer means for transferring information such as measurement and processing conditions to a CPU, a means for indexing data processing coefficients from a memory table attached to the CPU, and an electrical calibration box. 1. An online data acquisition/processing system using an electrical calibration box, comprising means for generating calibration data, correcting measured data using the calibration data, and performing processing based on the data processing coefficient.