JPH076858B2 - Pressure converter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pressure conversion device used for converting a color density value of a pressure discriminating paper into a pressure value.

[Conventional technology]

A pressure measuring method using a pressure discriminating paper and a densitometer has been put into practical use. This pressure discriminating paper is coated with a microencapsulated dye, and is used in combination with an ink film in which the microcapsule cleaves when pressure is applied, and the cleaved microcapsule dye such as magenta. It is composed of a mordanting film that is dyed into. The color density of this mordanting film (hereinafter simply referred to as "density") has a correlation with the applied pressure. Therefore, use a densitometer to measure the reflection density value of the color-developed area to determine the relationship between density and pressure. By referring to the concentration / pressure curve shown,
It is possible to check the pressure value applied to the pressure discriminating paper.

By the way, since the color density of this pressure discriminating paper changes depending on the temperature and humidity at the time of measurement, a plurality of density / pressure curves are actually prepared depending on the combination of the levels of temperature and humidity. Therefore, when measuring the pressure, first, the temperature and the humidity are examined, a concentration / pressure curve is selected from a combination of these levels, and the reflection density value is converted into a pressure value by referring to this curve.

Conventionally, in order to simplify pressure conversion,
There is known a pressure gauge for a pressure discriminating paper, which is described in Japanese Patent Publication No. This pressure gauge is used by connecting it to a densitometer, and the indication scale plate is provided with multiple pressure scale values according to the measurement conditions (temperature and humidity), and pressure scale values that match the measurement conditions are applied. Is selected so that the pressure value indicated by the pointer can be directly read.

[Problems to be solved by the invention]

The pressure gauge for the pressure discriminating paper described above has an advantage that the pressure value can be directly known only by selecting the pressure scale value to be used. However, when selecting this pressure scale value, it is necessary to refer to the temperature-humidity condition diagram that indicates which pressure scale value should be used from the combination of temperature and humidity, so it is necessary to satisfy quick and easy measurement. The reality is that it has not arrived.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a pressure conversion device capable of converting a concentration value into a pressure value quickly and easily.

[Means for solving problems]

In order to solve the above problems, the present invention is connected to a densitometer for measuring the density value of a pressure discriminating paper, a receiving unit for receiving the density signal output from the densitometer, and a temperature at the time of measurement And the input section for inputting the humidity, the memory that stores the environmental classification data in which the combination of the temperature and the humidity is associated with one of a plurality of preset environmental classifications, and the environmental classification data is referred to and input. Based on the combination of the temperature and humidity input from the section, select one of the plurality of environmental classification, the received concentration signal, a calculation unit for converting to a pressure value according to the selected environmental classification, An output unit for outputting the converted pressure value is provided.

[Action]

At the time of pressure measurement, the pressure conversion device is connected to the densitometer, and temperature and humidity are input from the input section. next,
Set the colored part of the pressure discriminating paper on the densitometer and measure the reflection density. The concentration signal obtained by this measurement is input to the receiving unit of the pressure conversion device. The calculation unit selects an environment classification based on the combination of temperature and humidity, converts the concentration value into a pressure value according to this environment classification, and outputs the obtained pressure value to the output unit.

Hereinafter, embodiments of the pressure conversion device of the present invention will be described in detail with reference to the drawings.

〔Example〕

In FIG. 2 showing a pressure measurement state, a display panel 11 and a keyboard 12 for inputting measurement conditions, dates and the like are provided on the upper surface of the pressure conversion device 10. Display panel
A liquid crystal display 11 is used, for example, to display the input data in the setting mode and digitally display the converted pressure value in the measurement mode. The keyboard 12 has a temperature
Use the numeric keys 13 to enter humidity, date, etc., the enter key 14 to instruct the end of data entry to move to the next operation step, the clear key 15 to erase the entered data, and the thermal paper 19. A feed key 16 for feeding the paper when cutting is provided.

Further, a thermal printer 18 is provided on the left side of the display panel 11 and the keyboard 12, and the date, the pressure value, etc. are printed on the thermal paper 19 in a roll shape. The thermal paper 19 is housed in a paper hood 20 that can be opened and closed, and is nipped and transported by the feed roller pair 21 during printing. Note that reference numeral 22
Is a slide type power switch.

The pressure conversion device 10 is connected to a densitometer 26 via a cord 25. This densitometer 26 has a display panel on its top.
27 is attached, and the average value of the plurality of measured reflection densities is digitally displayed, and the density signal is sent to the pressure conversion device 10. A push-type measurement switch 28 for starting measurement is provided on the side surface of the densitometer 26. Further, at the bottom of the densitometer 26, a bottom portion and a concave portion 29 cut out forward are formed, and a transparent plate 30 is attached so as to close the bottom surface of the concave portion 29. A measurement aperture 30a is formed substantially in the center of the transparent plate 30, and the measurement aperture 30a is pressed against the colored portion of the pressure discriminating paper 31 during pressure measurement.

FIG. 1 shows the configuration of a densitometer and a pressure conversion device. The light-shielding tube 35 is arranged so as to be inclined at 45 degrees with respect to the measurement aperture 30a, and a lamp 37 emitted by the driver 36 is housed in the light-shielding tube 35. In this floodlight system,
The luminous flux of the illumination light emitted from the lamp 37 is regulated by the opening formed at the tip of the light shielding tube 35, and the measurement aperture 30
The pressure discriminating paper 31 located inside a is illuminated in a spot shape.

The light-shielding cylinder 38 is faced to the measurement aperture 30a.
Are arranged vertically, and the lens 39 is housed in this. In this reflected light measurement system, the light reflected on the surface of the pressure discriminating paper 31 located in the measurement aperture 30a is regulated by the opening provided at the tip of the light shielding tube 38, and the lens 39 and the color filter 40 are used. The light then enters the light receiving element 41, and is photoelectrically converted there.

The reference light measuring system is composed of a light-blocking tube 43 communicating with the light-blocking tube 35, a color filter 40 and a light-receiving element 44, and a lamp 37.
A part of the illumination light emitted from is taken out and photoelectrically converted by the light receiving element 44.

The color filter 40 is for transmitting only reflected light in a specific wavelength range, and in this embodiment, a green filter is used for measuring the density of magenta color development. When measuring the black and white density, the color filter 40 is not necessary, and if the filter 40 is replaceable, the three color densities can be measured respectively.

The signals output from the light receiving elements 41 and 44 are sent to logarithmic conversion amplifiers 46 and 47, respectively, where they are amplified and logarithmically converted. The output signals of the logarithmic conversion amplifiers 46 and 47 are obtained by the subtractor 4
Subtraction processing is performed at 8 and converted into a density signal. This density signal is sent to the A / D converter 49 and converted into a digital signal (measurement data) at a predetermined cycle. A plurality of data obtained by this digital conversion is taken in by the CPU 50, an average value is calculated, and displayed on the display panel 27. In addition, a plurality of measurement data are sent to the pressure conversion device 10 via the code 25.
It is sent to and converted into a pressure value. In addition, this CPU50
The operation of each part is sequence-controlled in accordance with the program stored in the memory 51.

The measurement data output from the densitometer 26 is taken into the CPU 56 via the receiving unit 55 and written in the RAMA 57. ROM
58 is composed of three memory areas 58a, 58b, 58c. The memory area 58a stores the data of the temperature / humidity condition chart shown in FIG. 3, and the environment classification at the time of pressure measurement is determined from the temperature and humidity input from the keyboard 12. In this embodiment, four environment categories "A"-
It is divided into "D". The memory area 58b has a fourth
As shown in the figure, the data of the concentration / pressure curves corresponding to the environmental classifications “A” to “D” are stored, and the data of the concentration / pressure curve suitable for the environmental classification is selected. The concentration value is converted into a pressure value. Also, the memory area
58c stores a measurement condition setting program, a pressure conversion calculation program, a thermal printer operation program, and the like. When the battery (not shown) runs out of power, the display panel 11 displays an alarm (not shown).
This gives a warning about battery replacement.

Next, the operation of the above embodiment will be described. After connecting the concentration meter 26 to the pressure conversion device 10 via the code 25 and then turning on the power switch 22, each part of the pressure conversion device 10 is supplied with power and the concentration from the pressure conversion device 10 via the code 25. Power is supplied to a total of 26. When the power switch 22 is turned on, the CPU 56 of the pressure conversion device 10 starts the sequence of setting mode. First, on the upper left part of the display panel 11, "DATE"
The character “” appears and starts blinking. Then, operate the number keys 13 to input the 6-digit date. The input date is displayed on the display panel 11, and after confirming this, the enter key 14 is pressed. By pressing the enter key 14, the input date is written in the RAM 57, and the process proceeds to the next step. Here, if the date is input incorrectly, the clear key 15 is operated to erase the display of the input date and wait for the input, so that the date can be input again. If you do not need to print the date, enter key
You can operate 14 to go to the next setting step.

When the writing of the date is completed, the date changes to “DATE” and “TE
The letters "MP" will blink and the standard temperature will be "2.
3 ”is displayed. If the actual temperature is not 23 ° C,
Operate the number keys 13 of the keyboard 12. For example, in the case of 20 ° C., if “20” is input with the number keys 13, “20” is displayed on the display panel 11 instead of “23”. This temperature range is 5 ° C to 35 ° C, and if it exceeds this temperature, an alarm will be activated, the input data will be canceled and the initial state will be restored.
This alarm operation is also performed for the input of humidity and the like described later.

If you press the Enter key 14 after checking the display panel 11, you can proceed to the next step and replace "TEMP" with "HUMIDI
“TY” blinks and the numerical value “65” that indicates standard humidity 65% RH is displayed. If the humidity at the time of measurement is 65% RH, press the Enter key 14 and proceed to the next step. When the humidity is not 65% RH, the numeric key 13 is operated to input the actual humidity, and then the enter key 14 is operated. When this enter key 14 is operated, "N" is displayed blinking on the display panel 11, so "1" to "5"
Enter the number of measurements within the range. For example, when the number of times of measurement is set to "4", the maximum value and the minimum value of four measurements are displayed on the display panel 11, and the average value calculated from this is displayed. Since the standard number of measurements is set to "5", if you do not specify the number of measurements,
The number of measurements is automatically set to "5".

If you operate the enter key 14 after entering the number of measurements,
The word “CAL” flashes, indicating that condition setting is complete and measurement is ready. Here, if you operate the enter key 14,
The printer 18 starts its operation and waits for the densitometer to measure.
In the state of waiting for this measurement, “kgf / cm ² ” is displayed on the display panel 11.
Is displayed blinking. If you operate the clear key 15,
It is possible to return to the date setting step and restart the condition setting from the beginning.

Next, the pressure discriminating paper 31 which is set at the measured position and is pressed and colored is placed on the measurement table. While holding the densitometer 26 in an upright state, the bottom surface thereof is overlapped with the pressure discriminating paper 31, and then the pressure discriminating paper 10 is observed through the transparent plate 30 from diagonally above the concave portion 29, and the measurement aperture 30a is desired. Align so that it matches the measurement area. After the measurement aperture 30a is positioned, if the measurement switch 28 is pressed with a finger to turn it on, the lamp 37 is turned on and the concentration measurement of the pressure discriminating paper 31 is started. When this lamp 37 is turned on, the spot light whose size is regulated by the light-shielding tube 35 is transmitted to the transparent plate
The pressure discriminating paper 31 is illuminated by passing through the inside of the measurement aperture 30a of 30. The light reflected by the pressure discriminating paper 31 passes through the measuring aperture 30a, enters the light shielding tube 38, meets the lens 39 and the color filter 40, enters the light receiving element 41, and is photoelectrically converted therein. On the other hand, a part of the illumination light emitted from the lamp 37 is extracted as reference light through the light shielding tube 43, passes through the color filter 40, and then enters the light receiving element 44, where it is photoelectrically converted.

The signals output from the light receiving elements 41 and 44 are logarithmically converted and amplified by logarithmic conversion amplifiers 46 and 47 and then sent to a subtractor 48, and the difference between them is output as a reflection density signal.

The CPU 50 drives the A / D converter 49 at a predetermined cycle after the time required for the emission brightness of the lamp 37 to stabilize. Since this A / D converter 49 has a sampling function, it samples the concentration signal output from the subtractor 48 three times and converts it into a digital signal (measurement data). The three pieces of measurement data are fetched by the CPU 50, and when two pieces of data are the same, it is determined that the measurement data is valid, and one measurement is completed. At the end of this one measurement, valid measurement data is sent via code 25 to the pressure conversion device.
It is sent to ten receiving units 55. In the setting mode, the number of measurements is specified to be 4, so 4 measurements are performed and 4
The valid measurement data are sent to the pressure conversion device 10.

The densitometer 26 discards the maximum value and the minimum value from the four measured data, obtains the average value from the remaining two density values, and displays the density value on the display panel 27. On the other hand, pressure conversion device
In 10, the maximum value and the minimum value are obtained from the four measurement data, and the average concentration is calculated by arithmetically averaging the four measurement data.

The CPU 56 of the pressure conversion device 10 determines the environmental classification based on the temperature and humidity input in the setting mode with reference to the temperature / humidity condition chart data stored in the memory area 58a of the ROM 58. For example, when the temperature is 20 ° C. and the humidity is 63% RH, as shown in FIG. 3, it is determined that the environmental classification is the B zone. After determining the environmental classification, the CPU 56 refers to the memory area 58b and selects the data of the concentration / pressure curve corresponding to the environmental classification. In this example, since the environmental classification is "B", the concentration / pressure curve B shown in FIG.
Data is selected. The maximum concentration value, the minimum concentration value, and the average concentration value are converted into the maximum pressure value, the minimum pressure value, and the average pressure value by referring to the data of the concentration / pressure curve B.

The three types of pressure values calculated by the CPU 56 are displayed on the display panel 1
It is displayed on the screen 1 and sent to the thermal printer 18.
The thermal flutter 18 prints three types of pressure values, dates, etc. on the thermal paper 19.

Although the embodiment using one type of pressure discriminating paper has been described, it is actually used for high pressure, medium pressure, low pressure, and ultra low pressure.
Since there are types, the data of the temperature / humidity condition chart and the data of the concentration / pressure curve of each pressure discriminating paper are stored in the ROM 58 as channels respectively, and the type of the pressure discriminating paper is input in the setting mode. Is added and the number indicating the type is input by the number keys 13 to specify the channel. Further, the pressure measurement includes a continuous pressure measurement in which the pressure is gradually increased and an instantaneous pressure measurement in which the pressure is instantaneously increased, and the concentration / pressure curves are different from each other. Therefore, it is advisable to combine this measurement method with the type of pressure discriminating paper to form, for example, a high-pressure instantaneous pressure discriminating paper or a high-pressure continuous pressure discriminating paper, and divide these data into channels.

〔The invention's effect〕

As described in detail above, in the pressure conversion device of the present invention, the density signal from the densitometer for pressure discriminating paper is received, converted into a pressure value in consideration of the set measurement condition, and output. Therefore, pressure measurement can be performed easily and quickly. Further, unlike the conventional case, it is not necessary to select the concentration / pressure curve according to the measurement condition, so that it is possible to prevent erroneous measurement due to this selection error.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a pressure conversion device and a densitometer. FIG. 2 is an external view showing a state in which the pressure conversion device of the present invention is connected to a densitometer. FIG. 3 shows an example of the temperature and humidity condition diagram. FIG. 4 shows an example of a concentration / pressure curve diagram. 10 …… Pressure converter 11 …… Display panel 12 …… Keyboard 18 …… Thermal printer 26 …… Densitometer 31 …… Pressure discriminating paper 37 …… Lamp 41,44 …… Light receiving element 46,47 …… Logarithmic conversion amplifier .

Claims (3)

[Claims] 1. A receiver connected to a densitometer for measuring the density value of a pressure discriminating paper, for receiving a density signal output from the densitometer, and an input for inputting temperature and humidity at the time of measurement. Section, a memory storing environment division data in which a combination of temperature and humidity is associated with one of a plurality of preset environment divisions, and the temperature input from the input unit with reference to the environment division data. And one of the plurality of environmental categories based on the combination of humidity and humidity, the received concentration signal is converted into a pressure value according to the selected environmental category, and the converted pressure A pressure conversion device, comprising: an output unit for outputting a value. 2. The output section is a liquid crystal display for digitally displaying a pressure value.
The pressure conversion device described in the item. 3. The pressure conversion device according to claim 1, wherein the output unit is a printer that prints a pressure value on a recording sheet.