JPH0439531Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an industrial recorder that receives signals from many types of sensors, processes the input signals, and records and displays them.

(b) Conventional technology In the measurement of industrial processes, there are many types of signals transmitted from various sensors to recorders, etc.
For example, there are voltage signals of 1 to 5 V (pressure transmitters, etc.), mV voltage signals (thermocouples, etc.), and electrical resistance values (temperature detectors, etc.).

In order to receive and process these input signals, unique processing circuits such as individual interface circuits and linearizers are required. Depending on the type, interface circuits, etc. were replaced, and display units, display ranges, etc. were changed.

(c) Problems to be solved by the invention Providing separate recorders for a wide variety of input signals would be complicated and expensive. However, as with conventional recorders, it is cumbersome to replace interface circuits and signal processing circuits, and to change settings for display units, display ranges, etc. in accordance with the replacement, and there is a risk of setting errors. There was a problem.

In view of the above, this invention enables automatic setting of linearization processing, display units, display ranges, etc. by replacing the minimum amount of hardware according to the type of input signal, making it easy to operate when changing settings. The purpose of the present invention is to provide a recorder that can prevent malfunctions.

(d) Means and action for solving the problem The recorder of this invention has a designation circuit 8 between the input signal source 2 and the main circuit 4 for designating the type of input signal.
and an interface circuit 6 according to the type of the input signal, and the main body circuit includes an identification means 16 for receiving a designated signal from the designated circuit and identifying the type, and the input interface Signal processing means 17 that receives input signals from the circuit and performs processing according to the type identified by the identification means.
The display section 5 is configured to display the output of the signal processing means in a manner according to the type identified by the identification means.

In this recorder, when the replacement circuit is replaced according to the type of input signal, the interface circuit corresponding to the input signal type is connected in hardware, and the designated circuit in the replacement circuit is used to send the type designated signal. is input to the main circuit, the main circuit identifies the type, performs signal processing according to this type, and
The display unit, display range, etc. will also be changed automatically.

(e) Examples This invention will be explained in more detail below using examples.

The drawing is a circuit diagram of a recorder showing an embodiment of this invention. In the drawings, the recorder 1 includes a replacement circuit 3, a main circuit 4, and a display section 5.

The replacement circuit 3 is a circuit that can be replaced depending on the type of input signal, and includes an input signal interface circuit 6, an A/D converter 7, and a type designation circuit 8 inside. It also has input terminals 9, . . . , 9 for receiving input signals of a plurality of channels, and is connected to a sensor 2 (only one is shown) as an input signal source. The input terminals 9, . . . , 9 are connected to the input signal interface circuit 6 via a changeover switch 10, and by time-sequential switching of the changeover switch 10, signals of each channel are sequentially input. The output of the input signal interface circuit 6 is converted into a digital signal by an A/D converter 7 and output from a terminal 11.

The type designation circuit 8 includes six switch SWs, and by setting these six switch SWs on/off, ²⁶ type code signals are sent to the terminal 1.
It is now output from 2.

The main circuit 4 includes a software processing section 13 composed of a CPU, an input terminal 14 connected to the terminal 11 for receiving an input signal from the A/D converter 7, and an input terminal 14 connected to the terminal 11 for receiving an input signal from the A/D converter 7. The input terminal 15 is connected to the terminal 12 for receiving the type code signal.

The software processing unit 13 includes a decoder 16 that receives a type code signal from an input terminal 15 and identifies the type, and a functional block that performs predetermined processing on the input signal according to the identified type, such as linearization processing. A section 17 is provided. Although not shown, there are various other functional blocks such as a square root block.

The type and signal processing output identified by the software processing section 13 are added to the display section 5.
is adapted to display the signal processing output in a display manner according to its type, that is, in display units and display ranges. Of course, the signal processed by the software processing section 13 is stored in the memory for an appropriate period.

In the recorder of the above embodiment, for example, when the sensor 2 is a resistance temperature detector and the recorder 1 measures and records temperature, the replacement circuit 3 for the resistance temperature detector is replaced with the main circuit 4. It will be connected. In addition to the fact that the replacement circuit 3 is a resistance temperature detector, the display unit is set to, for example, °C, and the range is set to 0 to 50 °C in the type designation circuit 8. The type designation decoder signal is input to the decoder 16 through the decoder 16 and decoded.
With this decoded signal, the signal input via the input signal interface circuit 6, A/D converter 7, terminal 11, and input terminal 14 is linearized by the linearization processing section 17 and output to the display section 5. be done.

Further, the decoded output of the decoder 16 is also sent to the display section 5, and the screen is displayed with the unit of display being degrees Celsius and the range being 0 to 50 degrees Celsius. Regarding the display temperatures input to the display section 5, the current temperature is displayed on the digital temperature display section 5a, and the elapsed temperature over a certain period of time is continuously displayed on the trend display section 5b.

If it is desired to process and store input signals of other types, the replacement circuit 3 may be replaced with a corresponding one. The corresponding type code signal is inputted to the software processing unit 13 of the main body circuit 4 in the same manner as described above, and signal processing and display mode changes are automatically performed according to the type to be decoded. No effort is required for this.

In the above embodiment, the type designation circuit 8 is constituted by a switch SW, but the designation code signal may be set using a printed pattern fixed on a printed circuit board.

(F) Effects of the invention According to this invention, there is no need to perform processing or setting each time the replacement circuit is replaced, and the operation effort when changing the input type is greatly simplified. Furthermore, since the processing and settings are automatically performed by software processing in accordance with the designated code signal, errors in processing and settings will not occur.

[Brief explanation of drawings]

The drawing is a circuit diagram of a recorder showing an embodiment of this invention. 1...Recorder, 2...Sensor, 3...Replacement circuit, 4...Main circuit, 5...Display section, 6...Input signal interface circuit, 8...Type designation circuit, 13...Software wear processing section, 16... decoder, 17... linearization processing section.

Claims (1)

[Scope of claim for utility model registration] Receiving an input signal and performing signal processing in the main circuit,
In a recorder that displays the processing result on a display section, a replacement circuit including a designation circuit for designating the type of input signal and an interface circuit according to the type of the input signal between the input signal source and the main body circuit. an identification means for identifying a designation from the designated circuit in the main body circuit, and a signal processing means for receiving an input signal from the interface circuit and performing processing according to the type identified by the identification means; A recorder, wherein the display section displays the output of the signal processing means in a manner according to the type identified by the identification means.