JP2002123885A - Communication converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive communication converter allowing a receiving side to easily use an existing measuring instrument. SOLUTION: The communication converter is provided at the output end of a measuring instrument to which one communication signal including signals indicative of a plurality of physical or chemical quantities is output. The one communication signal including the signals indicative of the plurality of physical or chemical quantities is input to the converter. The input communication signal is converted so that the signals indicative of the plurality of physical or chemical quantities are separately outputted as signals indicative of the individual physical or chemical quantities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive communication converter in which an existing measuring instrument can be easily used on the receiving side.

[0002]

2. Description of the Related Art FIG. 2 is an explanatory view of the configuration of a conventional example generally used conventionally. In the figure, reference numeral 1 denotes a gas mass flow meter using a vortex flow meter, the output of which is a single communication signal A including a plurality of physical or chemical signals.
Is output.

In this case, specifically, measurement signals of the flow rate S1, the temperature S2, and the pressure S3 are included. The vortex flowmeter using the Karman vortex calculates the volume flow rate by multiplying the flow velocity by the pipe area.

When converting to mass flow, pressure and temperature are required for density calculation, so a thermometer and pressure gauge are installed inside the flow meter, and the mass flow is calculated by the converter based on the data. And output the mass flow signal.

Therefore, in communication with the mass flow meter, pressure data and temperature data can be sent out in addition to the mass flow data. Reference numeral 2 denotes a flow rate converter provided on the receiving side upon receiving the communication signal A, and a flow rate measurement signal S1, for example, 4 to 20 m
A, a signal of 1 to 5 V is obtained.

Reference numeral 3 denotes a temperature converter provided on the receiving side in response to the communication signal A, and a temperature measurement signal S2, for example, 4 to 2
A signal of 0 mA and 1 to 5 V is obtained. Reference numeral 4 denotes a pressure transducer provided on the receiving side upon receiving the communication signal A, and obtains a pressure measurement signal S3, for example, a signal of 4 to 20 mA, 1 to 5V.

[0007]

However, such an apparatus has the following problems. (1) A drawback of the conventional communication-to-signal conversion product is that when the communication is converted to a signal on the receiving side, the receiving side requires expertise in communication.

(2) Since one converter is required for one measurement signal, it takes time and effort to obtain a plurality of measurement signals. (3) Since a plurality of units are required, the entire apparatus becomes expensive.

[0009] An object of the present invention is to solve the above-mentioned problems, and to provide an inexpensive communication converter in which a receiving side can easily use an existing measuring instrument.

[0010]

In order to achieve the above object, according to the present invention, in the vortex flowmeter of the first aspect, one communication signal including a plurality of physical or chemical signals is provided. Provided at the output end of the output measuring device,
One communication signal including the plurality of physical quantity or stoichiometric signals is input, and this communication input signal is converted to separate the plurality of physical quantity or stoichiometric signals as individual physical quantity or stoichiometric signals. A communication converter that outputs the data to the communication device.

According to a second aspect of the present invention, an output terminal of a mass flowmeter for outputting one communication signal including a flow signal, a temperature signal, and a pressure signal is provided, and the one communication signal is provided. A communication converter is provided which is inputted and converts the communication input signal to output the flow rate signal, the temperature signal and the pressure signal separately as individual signals.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a main configuration of an embodiment of the present invention. In the drawing, the same reference numerals as in FIG. 2 indicate the same functions. Hereinafter, only differences from FIG. 2 will be described.

The communication converter 11 is provided at an output end B of the measuring device 1 from which one communication signal A including a plurality of physical quantity or stoichiometric signals is output. One contained communication signal A is input, the communication input signal A is converted, and a plurality of physical quantity or chemical quantity signals are separately output as individual physical quantity or chemical quantity signals, respectively.

In this case, a mass flow meter is used as the measuring device 1, and the communication signal A includes flow rate, temperature, and pressure data. Then, the flow signal S1, the temperature signal S2, and the pressure signal S3 are separately output by the communication converter 11.

As a result, (1) when one communication is converted into a plurality of measurement signals,
By the communication converter 11, a plurality of measurement signals S
1, S2, S3, so that the receiving side does not need communication expertise, and the receiving side can obtain a communication converter that can easily use existing measuring instruments, recorders, controllers, and the like. .

(2) Since it is provided at the output end B of the measuring device 1 on the transmitting side, a communication converter that can be easily installed can be obtained. (3) When changing to instrumentation using communication in the future, the communication converter 11 may be removed, so that a communication converter that can flexibly cope with the signal system can be obtained.

(4) Since the transmitting side does not need to prepare a dedicated amplifier for each sensor output, a communication converter that can reduce costs can be obtained. (5) Since the receiving side does not need a converter for each physical quantity, the cost can be reduced and an inexpensive communication converter can be obtained.

It should be noted that the foregoing description has been directed to specific preferred embodiments for the purpose of illustration and illustration of the invention. Therefore, the present invention is not limited to the above-described embodiment, but includes many more changes and modifications without departing from the essence thereof.

[0019]

As described above, according to the first and second aspects of the present invention, the following effects can be obtained. (1) When converting one communication into multiple measurement signals,
Since the transmitter converts the signal into a plurality of measurement signals in advance by the communication converter, the receiver does not need communication expertise, and the receiver can easily use existing measuring instruments, recorders, controllers, etc. A usable communication converter is obtained.

(2) Since it is provided at the output end B of the measuring device on the transmitting side, a communication converter that can be easily installed can be obtained. (3) When changing to instrumentation using communication in the future, the communication converter may be removed, so that a communication converter that can flexibly cope with the signal system can be obtained.

(4) Since the transmitting side does not need to prepare a dedicated amplifier for each sensor output, a communication converter that can reduce costs can be obtained. (5) Since the receiving side does not need a converter for each physical quantity, the cost can be reduced and an inexpensive communication converter can be obtained.
Therefore, according to the present invention, an existing measuring instrument can be easily used on the receiving side, and an inexpensive communication converter can be realized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is an explanatory view of a configuration of a main part of a conventional example generally used in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mass flow meter 2 Flow converter 3 Temperature converter 4 Pressure converter 11 Communication converter A Communication signal S1 Flow signal S2 Temperature signal S3 Pressure signal

Claims (2)

[Claims] 1. A communication device provided at an output end of a measuring device for outputting one communication signal including a plurality of physical quantity or stoichiometric signals, wherein one communication signal including the plurality of physical or stoichiometric signals is provided. A communication converter which receives a signal, converts the communication input signal, and outputs the plurality of physical or stoichiometric signals separately as individual physical or stoichiometric signals. 2. A mass flowmeter for outputting one communication signal including a flow signal, a temperature signal, and a pressure signal, which is provided at an output end of the mass flowmeter. Is a communication converter in which the flow rate signal, the temperature signal, and the pressure signal are separately output as individual signals.