JPH0447880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital display of measured values.

For example, in the field of machine tools, etc., the relative displacement between a bed and a table, etc. is converted into an electrical signal by an encoder, and this signal is counted by a counter.The resulting measured value is digitally displayed on a display. The device is known.

Conventionally, such digital display devices have the following drawbacks because the counter and the display are integrally configured.

If the display device is placed in a convenient position for monitoring, the distance between the encoder and the counter becomes long, and the influence of noise is large, which tends to cause measurement errors.

In a device that displays n-axis data (for n-axis), if it is necessary to display data on the n+1 axis, a counter and display must be prepared that are compatible with this. On the other hand, if it is sufficient to display the data on the n-1 axis, the display will be blank, making it inconvenient to read and also inconvenient for data retention.

When there are multiple displays for the n-axis,
When displaying all that data in one place,
This is especially inconvenient when temporarily storing display contents.

It is an object of the present invention to solve the above-mentioned accuracy problem, while also allowing any display means to be used in common regardless of the number of counters, and providing an optimal format for reading and storing data from any number of counters. An object of the present invention is to provide a digital display device capable of displaying images.

Therefore, in the present invention, the display device main body is divided into a first casing including the counter and a second casing including the display means, and Axis number identification code generation means for outputting an axis number identification code corresponding to the number of included counters is provided, and an axis for determining the axis number identification code from the axis number identification code generation means is provided in the second casing. a format selection means for selecting a display format from the discrimination signal of the axes number discrimination means; and a format selection means for displaying the data of the counter on the display means in accordance with the display format selected by the format selection means. The above object is achieved by providing a display control means. In short, by forming the counter side and the display means side separately and making it possible to always place the counter side and the encoder close to each other, the accuracy problem can be solved, while at the same time it is possible to solve the problem of accuracy from the counter side. By generating an axis number identification code, determining the axis number identification code on the display means side, identifying a display format from the determination result, and displaying the counter data on the display means according to the display format, To enable display means to be commonly used regardless of the number of counters, and to display data from any number of counters in a format optimal for reading and storing.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of this embodiment.
In the figure, a display device main body 1 is arranged in a first housing 2.
and a second casing 3. The first casing 2 and the second casing 3 are connected to each other via a transmission line 4 so as to be able to transmit data.

The first housing 2 includes one or more counters, four counters in this embodiment, 21, 22,
23, 24, and a multiplexer circuit 25 that selectively transmits the data of these counters 21, 22, 23, 24 to the second housing 3 via the transmission line 4 in accordance with commands from the second housing 3. and the first
an axis number identification code generating circuit 26 as an axis number identification code generating means for outputting an axis number identification code corresponding to the number of counters provided in the housing 2 to the second housing 3 through the transmission line 4; are provided for each. The counters 21, 22, 2
Encoders 3 and 24 are respectively connected to detect, for example, the amount of displacement of the table of the machine tool in each movement axis direction as an electrical signal. In the example of FIG. 1, the X encoder 11 detects the displacement amount of the table in the X-axis direction as an electric signal on the counter 21, and the Y encoder 11 detects the displacement amount of the table in the Y-axis direction as an electric signal on the counter 22.
The encoder 12 outputs the Z value of the table to the counter 23.
A Z encoder 13 that detects the amount of displacement in the axial direction as an electrical signal is connected to the counter 24, and a θ encoder 14 that detects the rotation angle θ of the table as an electrical signal is connected to the counter 24, respectively. Further, the axis number identification code generation circuit 26 generates an axis number identification code that indicates a single number when the number of counters provided in the first housing 2 is one, and an axis number identification code that indicates a plurality of counters when the number of counters provided in the first housing 2 is two or more. A numerical identification code is output for each. Therefore, in the example of Figure 1,
Since the number of counters is four, that is, two or more, the number of axes identification code representing a plurality of counters is output.

On the other hand, the second casing 3 determines the number of axes identification code transmitted from the number of axes identification code generation circuit 26 through the transmission line 4, and the first casing 2
The number of axes determining circuit 31 serves as a number of axes determining means for determining whether the number of counters is 1 or 2 or more.
, a format selection circuit 32 as a format selection means for selecting a display format based on the determination signal from this number of axes determination circuit 31; and the multiplexer circuit according to the display format selected by this format selection circuit 32. 25 to transmit data, and the counter 2 which is transmitted through the multiplexer circuit 25
A controller 34 as a display control means for displaying the data of 1, 22, 23 and 24 on a printer 33 as a display means, and a setting device 35 for giving an operation command etc. to the controller 34 are respectively provided. In addition to the above-mentioned functions, the controller 34 determines an abnormality in the counter (in this case, an abnormality in the encoder is also included) from the data of the counters 21, 22, 23, and 24 transmitted from the multiplexer circuit 25, It has an abnormality determination function that provides the result to the format selection circuit 32. A discrimination signal based on the abnormality discrimination function from the controller 34 is sent to the format selection circuit 3.
2, the format selection circuit 32
The display format is selected based on the determination signal from the axes number determination circuit 31 and the determination signal from the controller 34. For example, when an abnormality in the counter 22 is detected by the abnormality determination function of the controller 34, the display format is selected based on data from the counters 21, 23, and 24 other than the counter 22. .

Next, the operation of this embodiment will be explained. In a state where the first housing 2 and the second housing 3 are connected by the transmission line 4, the axis number identification code from the axis number identification code generation circuit 26 is transmitted to the second housing 3 through the transmission line 4. When the code is given to the number of axes discrimination circuit 31, the number of axes discrimination circuit 31 discriminates the transmitted number of axes identification code, and sends the result to the format selection circuit 32.
give to The format selection circuit 32 selects a predetermined format based on the determination signal from the number of axes determination circuit 31, and provides the result to the controller 34. Then, the controller 34 gives an operation command to the multiplexer circuit 25 of the first housing 2 through the transmission line 4. Multiplexer circuit 2
5, the data of counters 21, 22, 23, 24, that is, each encoder 11, 12, 13, 14
The amount of movement of the table converted into an electric signal by the controller 3 is sequentially and selectively extracted and transmitted to the controller 34 through the transmission line 4. As a result, the controller 34 determines whether there is an abnormality in the data transmitted from the multiplexer circuit 25, and
When there are no abnormalities, the data from the counters 21, 22, 23, and 24 is output to the printer 33 in accordance with the display format selected by the format selection circuit 32. Therefore, printer 3
3, the data of the counters 21, 22, 23, and 24 are output in the display format shown in FIG. 2, for example.

On the other hand, when the controller 34 determines whether the data transmitted from the multiplexer circuit 25 is abnormal, if any of the data is determined to be abnormal, the determination result is provided to the format selection circuit 32. Then, the format selection circuit 32 selects the abnormal axis data given from the controller 34, that is, the counters 21, 22, 23, and
A new display format excluding the data from 24 is selected. As a result, the controller 34
is one of the counters 21, 2 where an abnormality has occurred.
Only data excluding data from 2, 23, and 24 is output to the printer 33. Therefore, for example, when it is determined that a counter 22 is abnormal, the printer 33 sends information to other counters 2 other than that counter 22.
Data from 1, 23, and 24 are output in the display format shown in FIG.

In this way, data from any number of counters can be displayed in the optimal display format for reading and data storage. For example, if two counters are built in, and the number of counters is When the second housing 3 is connected via the transmission line 4 to the first housing 2 which generates the axis number identification code corresponding to the number of axes, the data from the two counters is
It is output in the display format shown in the figure. In addition, the transmission line 4 is connected to the first housing 2 which includes one counter and is configured to generate an axis number identification code corresponding to the number of the counter, that is, 1, from the axis number identification code generation circuit 26. When the second housing 3 is connected, the data from the counter is output in the display format shown in FIG. In this case, when it is determined that the counter is abnormal, the data from the counter is output in the display format shown in FIG. In other words, if there is only one counter and there is an abnormality in that counter, it will be output as is.

Therefore, according to this embodiment, the display device main body 1
, counter 2 connected via transmission line 4
Since the first housing 2 includes the printers 1, 22, 23, and 24 and the second housing 3 includes the printer 33, even if the printer 33 is placed in a convenient position for monitoring, the encoder and counter can be placed in close proximity to each other, so the effects of noise can be suppressed.

Further, an axis number identification code generation circuit 26 corresponding to the number of counters is provided in the first housing 2, and
The second housing 3 includes an axis number discrimination circuit 31 that discriminates an axis number identification code, a format selection circuit 32 that selects a display format based on the discrimination signal, and a data of the counter according to the selected display format. Since a controller 34 for outputting the data to the printer is provided, the number of counters built in the first housing 2 is determined on the second housing 3 side, and the display format is selected based on the number of counters. Since the data from each counter can be displayed according to the display format, the printer 33 can be used in common regardless of the number of counters, and the data from any number of counters can be read and saved. can be displayed in the optimal display format.
Therefore, for example, even when using various types of commercially available printers, there is no need for an interface corresponding to the number of counters or a table for printout.

In addition, when the number of counters is 1, it is used as a single axis number identification code, and when the number of counters is 2 or more, it is used as a multiple axis number identification code to identify both. When there are two or more numbers, there is no need to prepare in advance an axis number identification code corresponding to each number, and the code can be deciphered very easily.

In addition, the controller 34 has counters 21 and 2.
2, 23, and 24, and when an abnormality is detected in any of the counters by this abnormality determination function, the data from the counter where the abnormality was detected is excluded and displayed. This allows only normal data to be displayed at all times, and also prevents erroneous reading of abnormal data.

Further, counters 21, 22, 23, 2 are installed in the first housing 2 based on a command from the controller 34.
Since the multiplexer circuit 25 for selectively transmitting the data of 4 is provided, each counter 21, 22, 2
The number of transmission lines 4 for data transmission can be reduced compared to a system in which data from 3 and 24 are transmitted individually, and therefore cable processing can be performed extremely easily.

In addition, in implementation, if the axis number identification code generation circuit 26 is configured to be able to selectively output either a single designation or a plurality designation number identification code by switching, for example, a switch, etc. Regardless of the number of counters provided in one housing 2, the axis number identification code generation circuit 26 can be shared. In addition, in the above embodiment, two types of axis number identification codes are prepared, one for the case where the counter is 1 and one for the case where the counter is 2 or more, but when the counter is 2 or more, an axis number identification code corresponding to each number is prepared. You may also do so. Furthermore, if the counters 21, 22, 23, 24 and the controller 34 are connected individually, the multiplexer circuit 25 does not need to be specially provided.

Further, in the above embodiment, the number of axes determination circuit 31, the format selection circuit 32, and the controller 34
Although these are functionally decomposed into separate structures, they can be made into an integrated functional structure using, for example, a microcomputer. Furthermore, the display means may be, for example, a CRT or the like in addition to the printer described in the above embodiment. Furthermore, the display format is not limited to the above example, but may be any format that is optimal for reading and data storage.

Note that the present invention is not limited to displaying the amount of movement of a machine tool table as described in the above example, but can also be used to display measurement data of primary and multidimensional measuring machines, etc. This applies to all devices that display measurement data, regardless of the situation.

Therefore, according to the present invention, the accuracy problem can be solved, the display means can be used in common regardless of the number of counters, and the display format is optimal for reading and storing data from any number of counters. A displayable digital display device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIGS. 2 to 6 are diagrams showing display formats, respectively. 1...Display device main body, 2...First housing, 3...
...Second housing, 4...Transmission line, 21, 22,
23, 24... Counter, 26... Axis number identification code generation circuit, 11... X encoder, 12... Y
Encoder, 13...Z encoder, 14...θ
Encoder, 31... Number of axes determination circuit, 32... Format selection circuit, 33... Printer, 34...
…controller.

Claims (1)

[Scope of Claims] 1. A digital display device for measurement values comprising a counter that counts output signals from an encoder and display means that displays output data from the counter in a predetermined format, the display device body comprising: A first casing including a counter connected via a transmission line and a second casing including a display means are formed separately, and the first casing includes a counter included in the first casing. an axis number identification code generation means for outputting an axis number identification code corresponding to the number of axes, and an axis number determination means for determining the axis number identification code from the axis number identification code generation means in the second casing. a format selection means for selecting a display format from the discrimination signal of the axes number discrimination means; and a display control means for displaying the data of the counter on the display means in accordance with the display format selected by the format selection means. A digital display device for measured values, characterized by comprising: 2. In claim 1, the number of axes identification code is configured to be able to identify the number of counters included in the first casing as "1" or "2 or more". Digital display of measured values. 3. In claim 1 or 2, the display control means has an abnormality determination function for determining an abnormality in the counter, and the format selection means uses a determination signal from the number of axes determination means and a display. 1. A digital display device for measured values, characterized in that the display format is selected based on a discrimination signal from a control means.