JPH0821154B2 - Measurement data collection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a measurement data totaling system for totaling each measured value (physical quantity) measured by a plurality of measuring devices in one host system.

[Prior Art] For example, various product inspections are performed in a product inspection process in a factory. Usually, when performing product inspection of mass-produced products, a plurality of types of inspection devices (measurement devices) are installed along a product inspection line. Is installed, the object to be measured (product) flowing on the product inspection line is inspected (measured) by each inspection device, the measurement result is aggregated in the host system, and the product quality level and yield are calculated. .

There are various items in the inspection of the product, but for example, when measuring the dimensions of a product having a shape as shown in FIG. 5, there are about 10 measured values. In addition, the weight measurement will add 10 or more items. For example, when a worker measures more than 10 dimensional measurement items using calipers, one worker may measure all the items.
By dividing the measurement item into a plurality of workers, the measurement work efficiency can be improved and the probability of measurement error can be reduced.
Therefore, more than one measuring instrument is sufficient to measure the size of one product, and a plurality of measuring instruments are often required.

Then, the system for totalizing the measured values measured by the respective measuring devices in the host system is configured as shown in FIG. 6, for example. That is, each measuring instrument 1 is connected to a host computer 4 as a host system via a cable 2 and a repeater 3. A number is attached to the input connector of the repeater 3, and the host computer 4 recognizes the measuring instrument 1 connected to the connector of this number as the identification number (ID information) of the measuring instrument 1.

In such a system, the host computer 4
The measurement items and measurement order of the object to be measured by each measuring device 1 are programmed in the inside, and each worker is given to himself / herself in the set order by using the programmed measuring device 1. When the item is measured, the measurement data is automatically transmitted to the host computer 4 via the cable 2 and the repeater 3. The host computer 4 determines the measurement item of the input measurement data based on the connector number of the repeater 3 and the input order of the measurement data.

[Problems to be Solved by the Invention] However, the conventional system configured as described above has the following problems. That is, since each measuring instrument 1 and the host computer 4 are connected by the cable 2 via the repeater 3, the measuring instrument 1 may be handled by a worker such as the above-mentioned calipers. If so, there is a problem that the cable 2 gets in the way and the handling operation performance deteriorates.

Further, since the number of measuring instruments that can be connected to one repeater 3 at a time is limited, if the number of measuring instruments 1 increases, the number of repeaters 3 installed must also increase. Therefore, the entire system becomes large and the equipment cost also rises.

If the type of the measuring device 1 connected to the connector of the repeater 3 is changed every time one item is measured, the number of installed repeaters 3 can be suppressed, but the connector connection switching work is troublesome. This method is not practical considering connection errors and work efficiency.

The present invention has been made in view of such circumstances, and an object thereof is to improve measurement work efficiency by providing each measuring instrument with ID information and a wireless output function, and to improve the host system. It is to provide a measurement data totaling system that can surely identify and aggregate measurement data on the side.

[Means for Solving Problems] In the measurement data totaling system of the present invention, a plurality of measuring instruments, a measuring instrument main body for measuring or detecting a physical quantity of an object to be measured, and a measurement instrument main body are used for measurement. A / D converter that converts the measured value into a digital value, ID information setting means that sets the ID information that identifies this measuring device, and the measured value converted into a digital value and the ID information setting means And a transmitter for wirelessly outputting the ID information and the measured data telegram. In addition, the host system collects the measurement data telegrams wirelessly output from each measuring device and the measured values of each measurement data telegram received by this receiver based on the ID information, and also multiple When the measurement order by the measuring instrument and the allowable measurement value for each of the multiple measuring instruments are set in the host computer and the measurement order is different from the order set in this host computer, or the measured value is the allowable measurement value And warning means for issuing a warning when the value is out of the range.

[Operation] In the measurement data collecting system configured as described above, after the ID information for measuring the own measuring device is set in advance in each measuring device by the ID information setting means, the measuring device main body measures the object to be measured. When the physical quantity is measured, the measured value is converted into a digital value by the A / D converter, and then embedded in the measured data message together with the ID information and wirelessly output by the transmitter. The wirelessly output measurement data message is received by the receiver on the host system side and then input to the host computer. The host computer totalizes the measured values of the input measured data telegrams based on the ID information. When the measurement order is different from the measurement order set in the host computer, or when the measurement value is out of the allowable measurement value range, the warning means issues a warning.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a measurement data totaling system of the embodiment. In this embodiment, the case of application to a product inspection line of a factory will be described. That is, the DUT 12 shown in FIG. 5 flows in the arrow direction along the product inspection line 11. A plurality of measuring stands 13 are arranged along the product inspection line 11, and one worker 14 is assigned to each measuring stand 13, but in some cases automatic measurement is performed by a measuring instrument. In some cases Further, one workbench 13 is provided with measuring instruments 15 each made of one or a plurality of calipers. In addition, each measuring device 15
An ID number as ID (identification) information that identifies 15 is attached. Then, each worker 14 who is assigned to each measuring table 13 measures only the measurement item given to himself among the 10 measurement items up to and including the measured object 12 shown in FIG. Measurement is performed using the measuring device 15 specified for each item.

Further, in the figure, 16 is a host system, and this host system 16 has a receiver 17 for receiving the measurement data telegram wirelessly output from each measuring device 15, and the measurement data telegram received by the receiver 17 is valid. A control circuit 18 for notifying whether or not there is something by a buzzer 18a or an error lamp 18b, and a host computer 19 for collecting and analyzing the measured values of each measured data message
It consists of and.

2 (a) and 2 (b) are measuring instruments consisting of a caliper with a display unit.
15 is a front view and a side view showing 15. FIG. This measuring instrument 15
It is composed of a caliper main body 22 as a measuring instrument main body including a main scale 20 and a slider 21 with a display section, and a control section 23 in which a one-chip microcomputer mounted on the back surface of the slider 21 and a transmitter and the like are incorporated. ing.

Then, a plate-shaped capacitor is embedded in the scale 20a portion of the main scale 20 of the caliper body 22, and by moving the slider 21, the electrode attached inside the slider 21 slides on the capacitor. As a result, the capacitance of the capacitor taken out from this electrode changes. The capacity change of the capacitor is converted into a distance between the jaw 20b or beak 20c of the main scale 20 and the jaw 21a or beak 21b of the slider 21. Then, the converted distance, that is, the measured value is digitally displayed on the display unit 24 using a liquid crystal display element mounted on the surface of the slider 21.

Further, a transmission button 25 is attached to the finger rest portion of the slider 21, and a set screw 26 is screwed onto the upper surface of the slider 21.

On the side surface of the control unit 23 attached to the back surface of the slider 21,
A multi-digit DIP switch 27 for setting an ID number is attached, and a power switch 28 is attached to the back surface of the control unit 23.

FIG. 3 is a block diagram showing a schematic configuration of the control unit 23 and the measuring unit of the caliper main body 22. Reference numeral 31 in the figure is a CP that executes various calculation processes on the measured value input from the caliper main body 22.
U (Central Processing Unit), which is a CPU 33 that stores a control program via the bus line 32 in a ROM 33, an ID number and a RAM 34 that temporarily stores an input measurement value, an input measurement value and
A transmitter 35 for wirelessly outputting a measurement data message in which an ID number is incorporated, a transmission button 25, a DIP switch 27, and an I / O interface 36 for inputting measurement values from the caliper body 22 are connected.

Further, in the caliper body 22, the charge sensor 37 outputs a voltage signal corresponding to the measured value, which is composed of the capacitor embedded in the scale 20a of the main scale 20 and the electrode mounted in the slider 21, and is output from the charge sensor 37. The analog DC measurement signal is amplified by the amplifier 38, converted into a digital value by the A / D converter 39, and then displayed on the display unit 24. In addition, the measured values converted to digital values by the A / D converter 39 are connected cables.
It is input to the I / O interface 36 of the control unit 23 via 40.

The gain of the amplifier 38 is adjusted so that the measured value converted by the A / D converter 39 matches the actual distance and the zero point is adjusted. In this embodiment, the measured value is displayed on the display unit 24 with a maximum of 6 significant figures.

Further, a battery 40 is incorporated in the control unit 23,
The drive power V _D is supplied to each electronic component via the power switch 28 and the power circuit 42.

In the measuring device 15 having such a circuit configuration, when the power switch 28 is turned on and the ID number assigned to the own measuring device 15 is set by the DIP switch 27, the set ID number is stored in the RAM 34. It The ID number remains the same unless the setting state of the DIP switch 27 is changed.

With the ID number setting operation completed, the worker 14 measures one measurement item of the measured portion 12 on the measurement table 13 using the measuring device 15 having the ID number given to the measurement item.
In this case, the object to be measured 12 is placed on the jaws 20b and 21a of the caliper body 22.
And the slider 21 is moved, the measured value converted into the digital value displayed on the display unit 24 also changes. Then, when the object to be measured 12 is properly sandwiched between the jaws 20b and 21a and the send button 25 attached to the finger rest of the slider 21 is pressed, the CPU 31 of the control unit 23 moves to the I / O interface 36. The input digital measurement value is read as a correct measurement value and temporarily stored in the RAM 34. Then, the measured value and the ID number are edited into the measured data message 43 shown in FIG.

As shown in the figure, this measurement data telegram 43 has a header 44 consisting of a predetermined prescribed code indicating the measurement data transmitted from the measuring instrument 15 at the beginning, and the two-digit I
7 digit measurement data including D number 45 and decimal point (measured value) 4
6, parity code 47 for checking errors during data transmission, C / R indicating the end of this measurement data message
It consists of (carriage return) code 48 and LF (line feed) code 49.

When the editing of the measurement data message 43 is completed, the CPU 31 outputs this measurement data message 43 to the transmitter 35. The transmitter 35 frequency-modulates the input digital measurement data message 43 and wirelessly outputs it. In this case, the worker 14 itself also functions as an antenna.

The receiver 17 of the host system 16 in FIG. 1 has an antenna 17a.
When the frequency-modulated measurement data telegram 43 is received via, the measurement data telegram 43 is demodulated into the original digital measurement data telegram 43 and sent to the host computer 19 via the control circuit 18.

The host computer 19 checks the parity code of the input measurement data message 43 to check if there is a transmission error. If a transmission error has occurred, the control circuit 18
Sound the buzzer 18a via and the error lamp 1
Turn on 8b. After confirming the sound of the buzzer 18a and the lighting of the error lamp 18b, the worker 14 may measure the same item again.

In addition, the host computer 19 includes measurement items and measurement sequences on each workbench 13 and measuring instruments used for each measurement.
15 ID numbers are programmed, as well as a rough permissible measured value. Therefore, even if the worker 14 measures the wrong item of the DUT 12, measures in the wrong order, or even measures with the wrong measuring device 15, it is determined as a measurement error and as a warning means. Buzzer 18a, error lamp 18b
To issue a warning.

Then, when the host computer 19 determines that the input measurement data of the measurement data telegram 43 is correct, the host computer 19 totalizes the measurement data of each of the measurement items of to-be-measured objects 12 transmitted one after another. Then, based on the totalized result, it is determined whether or not each measured object is acceptable as a product, and data such as overall quality level and yield is calculated.

In the case of the measurement data totaling system configured in this way, since the transmission of the measurement data between each measuring device 15 and the host system 16 is executed using wireless communication, each measuring device 15
Since there is no need to connect the cable to the host system 16 with the host system 16, the measurement device 15 can be handled easily, and as a result, the measurement work efficiency of the worker can be greatly improved. Furthermore, since the repeater and the cable can be removed, the entire system can be made compact.

Also, since the ID number set for each measuring device 15 can be easily realized with about two digits, it is possible to easily increase the number of measuring devices 15 installed as compared with the conventional system shown in FIG. is there. Also, if necessary, the ID number can be easily changed, so if the type of the DUT 12 is changed or the measurement items are changed, each measuring instrument will be changed according to the program change of the host computer 19. The system can be easily reconfigured simply by changing the ID number of 15. That is,
It is possible to quickly respond to changes in the type of the object to be measured 12. Further, when the measurement order and the allowable measurement value of each measuring device 15 are programmed in the host computer 19, and when the measurement order is different from the measurement order, for example, a wrong item is measured and the measurement value is out of the allowable measurement value range. In case of, the warning is given by the buzzer 18a and the error lamp 18b.
Even if there is a measurement error due to, it is possible to immediately notice the error and perform correct re-measurement, eliminating human error and further improving the reliability of the measurement data.

Moreover, since each measurement data is always provided with an ID number, the host computer 19 does not capture wrong measurement data. That is, unlike the conventional system or the like, erroneous data is not directly input as in the case of a connector connection error of the repeater. Therefore, the reliability of the measurement data can be further improved.

As described above, according to the present invention, each measuring device itself has
It has ID information and wireless output function. Therefore, it is possible to remove the cables and repeaters that connect each measuring instrument to the host system, improve the measurement work efficiency, and reliably identify and aggregate the measured data on the host system side using the ID information. The reliability can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a measurement data totaling system according to an embodiment of the present invention, FIG. 2 (a) and FIG. 2 (b).
Is a front view and a side view showing the appearance of the measuring instrument of the embodiment, FIG. 3 is a block diagram showing a schematic configuration of the measuring instrument of the embodiment, and FIG. 4 is a measurement transmitted from the measuring instrument of the embodiment to the host system. FIG. 5 is a diagram showing a data telegram, FIG. 5 is a perspective view showing an object to be measured, and FIG. 6 is a block diagram showing a conventional system. 11 …… Product inspection line, 12 …… Measurement object, 13 …… Measuring stand, 14 …… Worker, 15 …… Measuring instrument, 16 …… Host system, 17 …… Receiver, 19 …… Host computer, 20 ……
Main scale, 21 …… Slider, 22 …… Vernier caliper body, 23 …… Control section, 24 …… Display section, 25 …… Send button, 27 …… Dip switch, 28 …… Power switch, 31 …… CPU, 33 ……ROM,
34 …… RAM, 35 …… Transmitter, 36 …… I / O interface, 37 …… Charge sensor, 38 …… Amplifier, 39 …… A / D converter, 41 …… Battery, 43 …… Measurement data message , 45 …… ID
Number, 46 ... Measured data.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiharu Okuyama 1-9-20 Gobongi, Meguro-ku, Tokyo Within Man Design Co., Ltd. (72) Inventor Yoshio Wakatsuki 1-9-20 Gogongi, Meguro-ku, Tokyo No. Wan DESIGN CO., LTD. (56) References Actual development Sho 59-84698 (JP, U) Actual development Sho 61-94993 (JP, U)

Claims (1)

[Claims] 1. A measurement data totaling system in which each measured value of an object to be measured measured by a plurality of measuring devices is aggregated in one host system, wherein each of the measuring devices measures a physical quantity of an object to be measured. The measuring instrument body to be detected, an A / D converter for converting the measurement value measured by the measuring instrument body to a digital value, an ID information setting means for setting ID information for identifying the measuring instrument, the digital instrument The measured value converted into a value and the ID information set by the ID information setting means are included in the measurement data telegram, and a transmitter that wirelessly outputs the host system is provided. ID of the receiver that receives the measurement data message and the measured value of each measurement data message received by this receiver
A host computer in which the measurement order by the plurality of measuring instruments and allowable measurement values for each of the plurality of measuring instruments are set based on information, and an order different from the measurement order set in the host computer And a warning means for issuing a warning when the measured value is out of the range of the allowable measured value.