JPH032820Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an instrument difference adjustment device for a flowmeter having an airtight electronic calculation device used as a meter.

A main body having an inlet at one end and an outlet at the other end, with a flow path formed inside, a metering rotor that is installed in the flow path of the main body and rotates in proportion to the flow rate, and a metering rotor attached to the metering rotor. A permanent magnet that rotates in accordance with the rotation of the measuring rotating body, a magnetic sensor that detects rotation by sensing changes in the magnetic field accompanying the rotation of this permanent magnet, and constants for each diameter that predetermine the output of this magnetic sensor. An electronic flowmeter is known that calculates the flow rate used based on . Such a flow meter is
For example, as shown in Japanese Unexamined Patent Publication No. 56-21018, a magnetic sensor, an arithmetic circuit, a display element such as a liquid crystal display that displays the flow rate used, and a battery that supplies power to these are mounted on a window in the upper part. The structure is hermetically sealed in a glass-covered container to improve environmental resistance. Therefore, the constants for each diameter are
Since the contents are stored in a fixed memory element such as ROM and cannot be changed after sealing, flowmeters with such an airtight electronic calculation device combine the airtight electronic calculation device with a metering rotation part such as a metering rotation body. After that, it was not possible to take detailed measures such as electronically correcting the flow meter's instrumental error.

In view of the above, this invention is an optical means for externally supplying data such as aperture-specific constants and instrumental error correction values, which are the basis of the calculations of the airtight electronic processing unit, while maintaining an airtight state, and for transmitting the measured data to the outside. The object of the present invention is to propose an instrument error adjustment device for a flowmeter, which includes an airtight electronic calculation device equipped with the airtight calculation device and a setting device optically coupled to the airtight calculation device.

In other words, the instrument error adjustment device for a flowmeter of this invention uses a rotating permanent magnet and a magnetic sensor arranged through a partition wall, and a rotation signal of the permanent magnet obtained by this magnetic sensor, which also uses data such as constants for each diameter. Instrumental adjustment of a flowmeter that has an airtight electronic calculation unit that includes a calculation unit that calculates the results, a display unit that displays the results, and a battery that supplies power to these units in an airtight container with a window glass on top. The apparatus includes a writable storage unit 14 for storing diameter-specific constants and correction values necessary for zeroing the instrumental error of the flowmeter;
The data of the constants and correction values for each aperture are sent to the window glass 11.
first photoelectric elements 20, 21, 22 that receive optical signals from outside the window and transmit them to the storage unit; an airtight electronic arithmetic unit 10 having a chemical display means having liquid crystal segments 18a, 18b, and 18c for displaying changes in a sealed case; and a first photoelectric element 20 that blinks in accordance with a constant for each diameter of the flowmeter. ,21,
light emitting devices 101, 102, 103 that project light signals from outside the window glass 11 to the liquid crystal segments 18a, 18b, 18c;
07 and a second photoelectric element 1 that reads the reflected light.
08, 109, 110 and light emitters 101, 10
2, 103, an input/output section 112 that drives the light emitting diodes 105, 106, 107 and receives the signals of the second photoelectric elements 108, 109, 110, and a constant for each diameter of the flowmeter. Accordingly, the first photoelectric elements 20, 21, 22 are blinked, and the second photoelectric elements 108, 109, 11 are blinked.
an arithmetic control unit that performs calculations and controls such as determining the instrumental error of the flowmeter from the metering data read at 0, calculating necessary correction values, and driving the light emitting diodes 105, 106, 107 via the output unit 111; 113
The present invention is characterized in that it includes a setting device 100 having the following.

Next, a description will be given based on the embodiments shown in the drawings.

In FIG. 1, reference numeral 10 denotes an airtight electronic processing device having a window glass 11 on its upper part, and a magnetic sensor 12 is connected to a rotating permanent magnet of a metering and rotating section (not shown), which connects a case (not shown) of the airtight electronic processing device 10 to a partition wall. It is arranged adjacent to the metering rotation part so as to face each other. The rotation of the permanent magnet is detected by a magnetic sensor 12.
is detected and transmitted to the calculation unit 13 as an electrical signal, and is calculated based on data such as diameter-specific constants stored in the RAM of the storage unit 14.
The used flow rate is numerically displayed on a liquid crystal display board 18 via a liquid crystal drive 16 and a numerical display drive circuit 17.
The measurement data from the calculation section 13 is sent to the output section 15 to cause the light emitting element (diode) 19 to blink.
Also, via the liquid crystal drive 16, the liquid crystal display board 18
The liquid crystal segments 18a, 18b, and 18c are made to blink. Numerals 20, 21, and 22 are photoelectric elements arranged on the upper surface of the printed wiring board 23 together with the liquid crystal display panel 18 and the light emitting element 19, and receive data such as oral constants based on optical signals incident from outside through the window glass 11. , input section 24 as an electric signal, calculation section 1
3 to the storage unit 14. 25 is a battery.

100 is a window glass 11 of the airtight electronic processing device 10
A setting device placed on the top surface is used to write data to the storage unit 14 and to control the liquid crystal segments 18a to 18c.
and photoelectric reading of the measurement data displayed by blinking the light emitting element 19. This setting device is particularly useful when performing instrumental adjustment of a flow meter. The magnetic sensor 12 detects the rotation of the metering rotating body of the flowmeter.
The light emitters 101 to 103 of the setting device 100
is blinked according to a constant for each diameter of the flowmeter, and the photoelectric elements 20 to 22 receive the optical signal and store it in the storage unit 14.
Calculations are performed based on the data written in
Read it with. The light emitting element 19 is a photoelectric element 104,
The blinking of the liquid crystal segments 18a to 18c is achieved by reading the reflected light projected by the light emitting diodes 105 to 107 with the photoelectric elements 108 to 110. The setting device 100 includes an output section 111 that drives the light emitters 101 to 103;
It consists of an input/output section 112 that drives the light emitting diodes 105 to 107 and receives signals from the photoelectric elements 108 to 110, and an arithmetic control section 113 that controls these and performs calculations.

When adjusting the flowmeter, first store the necessary data in the light emitters 101 to 103 in the storage unit 14 as described above.
The weighing data calculated by the calculation unit 13 based on the data is sent to the photoelectric elements 104, 108 to
110 , the arithmetic control unit 113 determines the instrumental error (error) of the flowmeter, and the output unit 111 outputs a correction value necessary to make the instrumental error zero, and the light emitting units 101 to 10
3, the instrument error of the flowmeter can be automatically adjusted to a small value by projecting light onto the photoelectric elements 20 to 22 as an optical signal and writing it into the storage section 14. When the diameter-specific constant, that is, the integration unit for each pulse of the magnetic sensor signal is first written, the error of the flowmeter, which was the instrumental error curve shown by the solid line A in FIG. It is possible to improve each flow meter to a value close to zero in practice, as shown by the broken line B in the figure, by writing the value in the figure. The correction is performed by adding a slight plus or minus correction value to the integration unit for each fixed flow rate range. Note that the data written to the storage unit 14 can be useful for automatic meter reading by writing the instrument number of the measuring instrument in addition to the diameter-specific constants and correction values.

Liquid crystal segments 18a to 18c and light emitting elements 19
Sending of data to the outside may be controlled by commands using optical signals from the light emitters 101 to 103 of the setting device 100, and may be sent only when necessary.
Note that the light emitting element 19 uses a light emitting diode and is driven by a fast pulse for sending out an instantaneous flow rate.

According to this invention, corrections and necessary settings for each caliber can be made in the flowmeter by combining the rotary measuring part such as the metering rotor and the airtight electronic calculation device, making it possible to make detailed settings for each individual flowmeter. Not only is this possible, but the adjustment work can also be streamlined since no mechanical adjustment of the rotary measuring unit is required.

Moreover, the airtight electronic calculation unit displays the weighing data by blinking the liquid crystal segment, and the reflected light emitted by the setting device's light emitting diode is read by a photoelectric element, so the battery built into the airtight electronic calculation unit is There is no fear of it being worn out.

[Brief explanation of the drawing]

FIG. 1 shows the main part of an embodiment of this invention, and shows an example of its use in a flowmeter. FIG. 2 is a top perspective view of the hermetic electronic arithmetic unit shown in FIG. 1, and FIG. 3 shows an instrumental error curve. 10... Airtight electronic computing device, 11... Window glass, 12... Magnetic sensor, 13... Arithmetic unit, 14
... Storage section, 15 ... Output section, 18 ... Liquid crystal display board, 18a, 18b, 18c ... Liquid crystal segment, 19 ... Light emitting element, 20, 21, 22 ... First photoelectric element, 25 ... Battery, 100... Setting device, 101, 102, 103... Light emitter, 10
5,106,107...Light emitting diode, 10
8, 109, 110... second photoelectric element, 111
...Output section, 112...Input/output section, 113...Arithmetic control section.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotating permanent magnet, a magnetic sensor disposed through a partition wall, and a calculation unit that calculates the rotation signal of the permanent magnet obtained by the magnetic sensor based on data such as constants for each diameter. An instrument difference adjustment device for a flowmeter, which has an airtight electronic calculation device in which a display section that displays the results, and a battery that supplies power to these are housed in a sealed container with a window glass on the top, and the caliber is A writable storage section 14 for storing different constants and correction values necessary for zeroing the instrumental error of the flowmeter, and an optical signal from outside the window glass 11 to store the data of the constants for each diameter and the correction values. a first photoelectric element 20, 21, 22 which receives the signal and transmits it to the storage section;
and liquid crystal segments 18a, 18 that display the measurement data calculated by the calculation unit 13 as optical changes that can be optically recognized from outside the window glass 11.
an airtight electronic arithmetic unit 10 having an optical display means having indicators b and 18c built-in in a sealed case;
light emitters 101, 102, 1 that project optical signals from outside the window glass 11 onto the photoelectric elements 20, 21, 22 of the
03, and the liquid crystal segments 18a, 18b, 1
8c, light emitting diodes 105, 106, 107 that project light from outside the window glass 11, and second photoelectric elements 108, 109, 110 that read the reflected light.
, an output section 111 that drives the light emitters 101, 102, 103, and light emitting diodes 105, 106,
107 and the second photoelectric element 108,
Input/output unit 112 that receives signals 109 and 110
Then, the first photoelectric elements 20, 21, 22 are blinked according to the constant for each diameter of the flowmeter, and the instrumental error of the flowmeter is determined from the measurement data read by the second photoelectric elements 108, 109, 110. A necessary correction value is calculated and output to the light emitting diode 10 via the output section 111.
A setting device 100 having an arithmetic control section 113 that performs arithmetic operations and control such as driving 5, 106, and 107.
An instrumental difference adjustment device for a flowmeter, characterized by comprising: