JPS6029612A - Apparatus for testing industrial instrument - Google Patents

Abstract

PURPOSE:To enable a test of industrial meter and to reduce the times for measurement and testing by allowing to have various input and output signals in one testing apparatus for industrial instrument. CONSTITUTION:Each signal from an electrical signal measuring part 1 and an air pressure signal measuring part 2 is changed over by a multiplexer 3, converted from analogue value to digital value by an A/D converter 4, and is fetched in a CPU6 through an interface 5. A memory 7 is used for performing various arithmetic controls by the CPU6. Signals outputted from an electrical signal generating part 10 and an air pressure signal generating part 11 are converted from digital value to analogue value by a D/A converter 8 through the interface 5 from the CPU6, changed over and selected by a multiplexer 9, and outputted from either of the generating parts. Keys for inputting while assigning measurement or generation and keys for setting a classification of signals such as electrical signal and air pressure signal are provided at a setting part 14, in addition to a display part 12 and a printing part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an industrial meter testing device that can automatically test industrial meters that use electrical signals, pneumatic signals, etc. as input/output signals.

(b) Prior art In general, industrial instruments include those that use either electricity or pneumatic pressure as input/output signals, those that use electrical signals for input and pneumatic signals for output, or conversely, those that use pneumatic signals for input. There are various types, such as those that derive an electrical signal as an output.

Standard signal generators that individually generate highly accurate pneumatic signals and electrical signals have been used to inspect and adjust these industrial instruments. There are also comprehensive test devices that combine these standard signal generators. However, these test devices have a fixed device under test, and there is no existing device that can arbitrarily select input/output signals such as electrical signals and pneumatic signals, and display and print them. I hadn't.

Furthermore, in recent years, a test device that uses a microprocessor to programmably output an air pressure signal has been proposed, but this test device still does not have a display printing function.

Therefore, when testing industrial instruments using conventional test equipment, a single industrial instrument testing equipment is not enough; proper testing requires a combination of various test equipment, display devices, and printing devices. could not be done.

(c) Purpose In view of the above, the object of the present invention is to enable testing of industrial meters having various input/output signals with one industrial meter testing device, and to provide a method that does not require much time for testing. The purpose of the present invention is to provide an economically superior industrial instrument testing device.

(d) Structure In order to achieve the above object, the industrial instrument testing device of the present invention is provided with an electric signal generating section, a pneumatic signal generating section, an electric signal measuring section, and a pneumatic signal measuring section in the generating section and the measuring section, respectively. In addition, the setting input section is provided with a selection key for switching between output and input, that is, whether the generation is measurement or not.
Further, setting means is provided for selecting signal types such as pneumatic signals and electrical signals, and by operating these setting means, input/output signals are selected, display section signals are selected, and print signals of the printing section are selected. That's what I do. That is, the industrial instrument testing apparatus of the present invention includes an electrical signal generating section that generates an electrical signal to be input to the device under test, a pneumatic signal generating section that generates a pneumatic signal to be input to the device under test, and an electrical signal measuring section that receives an electrical signal output from a test device for measurement; a pneumatic signal measuring section that receives an air pressure signal output from a device under test for measurement; a setting input section including a means for setting a fixed type and a means for setting a signal type such as the electrical signal and the pneumatic signal; a display section for displaying each of the electrical signals and the pneumatic signal; and a display section for printing these signals. The electric signal generating section, the pneumatic pressure signal generating section, the MJ electrical signal measuring section, and the pneumatic pressure signal measuring section are activated in response to the printer and the type of generation/measurement and the type of signal entered in the setting input section. It is comprised of an arithmetic control section that performs selection drive and controls the display section and the printer to perform display and printing corresponding to the selection.

(e) Examples The present invention will now be described in more detail with reference to examples shown in the drawings.

FIG. 1 is a block diagram of an industrial instrument testing apparatus showing one embodiment of the present invention. In the figure, 1 is an electrical signal measuring section that receives an electrical signal from the device under test, and 2 is a pneumatic signal measuring section that receives an air pressure signal from the device under test. Each signal from these electric signal measuring section 1 and pneumatic signal measuring section 2 is as follows.
The multiplexer 3 switches the values, and the A/D converter 4 converts the analog values into digital values, which are then taken into the CPU 6 via the interface 5. Note that 7 is a memory used by the CPU 6 to perform various calculation controls. Reference numeral 1o denotes a signal generator that outputs an electric signal to the device under test, and reference numeral II denotes a pneumatic signal generator that outputs a pneumatic signal to the device under test. The signals outputted from the electric signal measuring unit ○ and the pneumatic signal generating unit 11 are sent from the CPU 6 through the interface 5, converted from digital values to analog values by the D/A converter 8, and are switched and selected by the multiplexer 9. The signal is configured to be output from one of the generating sections.

12 is a display section that displays the measurement signal or generated signal, and 3 is the same (printing section that prints out the measurement signal or generated signal. 14 is a setting section, in which measurement or generation is specified. keys to input, electrical signals,
It is equipped with keys for setting the type of signal such as an air pressure signal.

FIG. 2 shows a panel section of the industrial instrument testing apparatus shown in FIG. 1 above. The panel part of this industrial instrument testing equipment is
It is composed of a measuring section 2o, a generating section 3o, and a printing section 13. The measuring section 2o is equipped with an electrical signal input terminal 1a and a pneumatic signal input terminal 2a, and similarly, the generating section 30 is equipped with an electrical signal output terminal 10a and a pneumatic signal output terminal 11.
It is equipped with a. Furthermore, the measuring section 20 and the generating section 30 include
Input signal display 12a and output signal display 12b, respectively
, further includes a display 12c for displaying the type of input signal, and a display 12d for displaying the type of output signal.

The display 12C that displays the type of input signal and the display 12d that displays the type of output signal are, for example, ■, mA, kg.
Signal unit types such as /ct can be selected and displayed in sequence.

Furthermore, keys of the setting section 14 are arranged in the measuring section 20. 14a is a key 1 for setting IN, that is, the measurement section;
4b is a key for instructing and setting Out, that is, generation; 14c
14d is a key for selecting a type by sequentially shifting the indicators 12c and 12d displaying the type of signal downward, 14d is a key for selecting a type by moving the indicators 12c and 12d upward, and 14e is an enter key.

For example, when measuring an input signal from a device under test using an electric signal mA, the key 14C or the key 12c of the setting section 14 is pressed so that the key 14a of the setting section 14 and the signal type display 12c display "m" and "A". 14d to select the type, and enter key 14e to enter the measurement data manually.

Next, when outputting the air pressure signal kg/ct,
The user operates the key 14b of the setting section 14, then operates the key 14C or 14d so that kg/ca is displayed on the display 12d that displays the type of generated signal, and then operates the enter key 14e.

Next, the test processing operation of the industrial meter testing apparatus according to the embodiment will be explained with reference to the flowchart shown in FIG.

First, when the operation starts, it is determined whether the signal set in step STI is "rlN", that is, "measurement". If the key 14a is set to indicate, the determination in this step is YES, and then, by selecting the type key 14C114d, it is determined whether the signal to be measured is "■" (Sr1). Here, if the signal to be measured is an electric signal and ■, the judgment is YES and Sr
4, and execute the measurement processing program using voltage ■. In this case, the data displayed on the measurement display 12a is processed by the multiplexer 3 to be represented by the voltage value V.
Connection processing to the measurement unit 1 and the like are executed. In addition, if the specified signal signal is not V but an electric signal mA, the determination of Sr1 is No, the determination of Sr1 is YES, and here the program moves to the measurement processing program using mA of Sr5, and mA measurement is performed. Perform the necessary processing. Similarly Sr1
When making a judgment, the type of signal to be measured is kg / cJ
.

In other words, if it is an air pressure signal, the judgment No. of Sr1
, rmA at Sr1 is also determined as No, and the process moves to Sr6 to execute the measurement processing program based on kg/cnT. In this case, for example, the multiplexer 3
A/D converter 4 can be switched to input a signal from A/D converter 4 to A/D converter 4.

Furthermore, when the content to be tested is to output a signal value from this industrial instrument testing equipment to the device under test, the generation indicator 14b is operated, so the determination of "rlN" in STI is N.
o, and then a determination as to whether it is "Out" is made at Sr1. Since this judgment is YES, next, from ST8 onwards, select whether the signal to be generated is an electric signal of V or mA, or an air pressure signal of kg/cJ, and depending on the selection, Sr1.5TIO, etc. Move to program processing.

In the above embodiment, the types of signals in the case of measurement and generation are voltage ■, current mA, and air pressure signal kg/cr.
Although the explanation has been given using A as an example, it goes without saying that other signals can be arbitrarily selected.

(Effect) As mentioned above, according to the industrial instrument testing device of this invention,
Since industrial instruments with various input/output signals can be tested with one device, there is no need to prepare a large number of test devices for each industrial instrument to test various industrial instruments, and there is no need to prepare many test devices for each industrial instrument. Since there is no need to replace each time, measurement time can be shortened, and the test location can be kept small as only one setting device is required, and the cost of testing equipment is overall economical. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an industrial meter testing device showing one embodiment of the present invention, FIG. 2 is a diagram showing the front panel of the same industrial meter testing device, and FIG. 3 is a diagram showing the operation of the industrial meter testing device. This is a flowchart. 1: Electric signal measurement section, 2: Air pressure signal measurement section, 6: CP
U, 10: Electrical signal generation section, 11: Pneumatic signal generation section, 12: Display section, 13: Printing section, 14: Setting section Patent applicant: Shimadzu Corporation Representative Patent attorney: Shigenobu Nakamura

Claims (1)

[Claims] (1) An electrical signal generator that generates an electrical signal to be input to the device under test, a pneumatic signal generator that generates a pneumatic signal to be input to the device under test, and an electric signal that is output from the device under test. an electrical signal measuring section that receives a signal for measurement; a pneumatic signal measuring section that receives a pneumatic signal output from the device under test for measuring; a means for setting the type of generation or measurement of the electrical signal, pneumatic signal, etc.; a setting input section including means for setting signal types such as the electric signal and the pneumatic signal; a display section for displaying each of the electric signals and the pneumatic signal; a printer for printing these signals; In response to the input generation/measurement type and signal type, the electric signal generation section, the pneumatic pressure signal generation section,
An industrial instrument testing device comprising an arithmetic control unit that selectively drives the electrical signal measuring unit and the pneumatic signal measuring unit, and controls the display unit and the printer to display and print corresponding to the selection.