JP2002296193A - Methods for establishing judgement-made value in flawed glass bottle inspection machine and for collecting reference data indispensable to the same value - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for establishing a judgement-made value in a simple way as well as in a very short time in a flawed glass bottle inspection machine, also requiring no more an individual adjuster's skill in setting up the same value. SOLUTION: A voltage waveform per bottle being outputted from each of respective flaw-detecting substrate at plural channels of the inspection machine is imported into each of respective bottom-hold circuits, wherein a minimum voltage value amid the inspection-timing thereof is measured. Then, such minimum voltage data having been measured at each channel are introduced into a device for collecting the maximum data of the flawed bottle, and the same minimum voltage value in the form of analogous quantities is converted to digital, the one thus digitized being transmitted to a computer, wherein the reference data at each bottle and channel involved therein are written on the tabular computing software. Thus, since the statistical data compilation is made possible, such an individual's dedicated skill in determining the setpoint value is no more required and the inspection itself can also be stepped up in precision.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a defect (hereinafter simply referred to as "battery") such as foreign matter on the inner surface of a glass bottle, scratches, and cracks.
Defect inspection machine (so-called FP)
(Inspection machine), a method for setting an appropriate judgment value of normality or a defect, and a data collection method for setting the judgment value.

[0002]

2. Description of the Related Art In a vibration inspection, light is applied to a glass bottle, a light amount reflected from the glass bottle is received by a vibration detection substrate having a solar cell element, and the light amount is converted into a voltage signal (battery voltage). When there is "chatter" on the inner surface of the bottle, the amount of reflected light is greater than when there is no chatter. Therefore, a determination value is provided for this chatter voltage to determine the presence or absence of chatter. That is, the chatter voltage is smaller than the determination value (the light amount is large).
Sometimes it is "faulty", and the opposite is "normal". The judgment value changes depending on the position of the light-receiving element, the position of the light source, the type of glass bottle, etc., so if there is a change in the product (glass bottle) type, the chatter voltage output from the chatter detection board will be Measuring instrument)
Is used for visual observation, and an appropriate judgment value (voltage value) is set.

[0003]

Conventionally, when an appropriate judgment value is set, a voltage waveform measured once per bottle with an oscilloscope is visually observed. There are a large number of positions (the number of vibration detection boards) where the inspection is performed, which are dozens or more, and it is necessary to set a judgment value for each of them. Therefore, there is a problem that setting the judgment value takes an extremely long time.

An object of the present invention is to set a determination value of an FP inspection machine simply and in a short time, and without variation such as individual differences among coordinators.

[0005]

According to the present invention, a voltage waveform per bottle output from each of the chatter detection boards of a plurality of channels of an inspection machine is taken into a bottom hold circuit, and the lowest voltage during the inspection timing is obtained. Measure the value, take the lowest voltage data measured in each channel, take it to the maximum value data collection device, convert the analog value of the lowest voltage into a digital value, transfer the digitized lowest voltage to the computer, and spreadsheet This is a data collection method for setting a judgment value of a defect inspection machine for glass bottles, which is described for each bottle and each channel on software.

The bottom hold circuit is a circuit that measures the lowest value within a specified sampling period using a digital meter relay and holds the lowest value. For example, when the voltage to be measured fluctuates between + 5V and -7V, the circuit holds -7V and outputs the analog voltage with the next hold signal.

Further, the chatter maximum value data collecting device converts the analog voltage into a plurality of channels (hereinafter "CH") at the timing of a capture signal (data capture signal of the capture device).
) Is sampled at high speed, converted into digital data with high precision, stored in a large-capacity memory, and directly collected by a computer via a PC card.

The control of the start, end, and reset operations of the bottom hold circuit, and the control of the data receiving operation of the maximum vibration data collecting device are controlled based on a timing signal from the FP inspection machine of the sequencer connected to the FP inspection machine. Can be performed.

Further, the present invention is a method for setting a judgment value of a glass bottle defect inspection machine, wherein the judgment value is set based on the data collected by the above method.
Since the data can be statistically processed, there is no individual difference in the set determination value, and the inspection accuracy can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings relating to embodiments. FIG. 1 is a schematic explanatory view of a device for implementing the present invention, FIG. 2 is an explanatory diagram showing a signal flow in the device, FIG. 3 is an explanatory diagram of a control signal, and FIG. 4 is an explanatory diagram showing an example of a data sheet. is there.

The FP inspection machine shown in FIG. 1 is an example in which the number of chatter substrates (the number of inspection locations) is 14CH. FP
The voltage waveform per bottle output from each of the chatter detection boards CH1 to CH14 of the inspection machine is taken into the bottom hold circuits CH1 to CH14, respectively, and the lowest voltage value during the inspection timing (the chatter detection board is the (The more the amount of received light, the more negative voltage is output.) 14CH each
The minimum voltage data measured in step (1) is input to the maximum value data collection device, and the analog value of the minimum voltage is converted into a digital value. The digitized minimum voltage is transferred to the host computer, and described for each CH on spreadsheet software. For example, it is possible to flow 25 bottles, collect 25 data for each CH, process the data statistically, and set a determination value (voltage value).

Referring to FIGS. 2 and 3, the flow of signals in the above device will be described. The FP inspection machine performs an inspection at a predetermined cycle, and outputs a chatter voltage 14CH and a timing signal each time. The chatter voltage is sent to the bottom hold circuit, and the timing signal is sent to the sequencer. The sequencer outputs a hold signal to the bottom hold circuit at the start and end of the timing signal, and outputs a capture signal (a signal for instructing data capture) to the collection device after the timer set value has elapsed since the end of the timing signal. Output. The bottom hold circuit is a digital meter relay, and upon receiving a hold signal from the sequencer, resets the lowest voltage value that has been held so far and starts holding the voltage value. The hold voltage in FIG. 3 represents the lowest voltage held by the hold circuit. Then, from the hold signal to the next hold signal, the lowest voltage value between the previous hold signals is continuously output. As indicated by the output of the hold circuit in FIG. 3, the lowest voltage a held at the inspection timing is continuously output during the next hold signal. The maximum vibration value data collection device is a device that samples analog voltage at high speed, captures the lowest voltage output from the bottom hold circuit for each channel by a capture signal from the sequencer, and converts it to digital data with high accuracy. Transfer to computer. The computer starts (instructions to start collection), the number (instruction of how many bottles of data to collect), the inspection CH (for example, an instruction to collect data of 1CH to 14CH) to the chatter maximum value data collecting device. Make a command.

For example, as shown in FIG. 4, the computer writes the digital minimum voltage received from the collection device on a data sheet for each bottle and each CH. Further, an average value, a minimum value, a maximum value, a standard deviation, and the like may be written as needed.

The statistical processing for obtaining the judgment value is performed based on data as shown in FIG. For example, a bottle having the same defect (the magnitude of the chatter) is sampled 100 times, and the difference between the maximum chatter (the minimum voltage determined as a large chatter) and the minimum chatter (the maximum voltage as the small chatter) is large. ,
If the variation is large, it can be determined that the handling of each station for detecting chatter is not set properly. Also, after completing the setting of the inspection machine, the threshold of product quality can be derived for each channel by using the total data obtained by sampling the data by flowing non-defective bottles online, thereby reducing false rejection of non-defective products. be able to. Therefore, even an inexperienced adjuster can use these statistical processing results to set a threshold value for all 14 channels in a short period of time without fail to eliminate defective bottles and eliminate non-defective bottles.

[0015]

The present invention has the following effects. Since the chatter voltages of many channels can be automatically collected at the same time, the adjustment time can be significantly reduced. Since statistical processing is possible, there is no individual difference in the set judgment value, and the inspection accuracy can be improved. Since data of a large number of channels can be displayed on the computer screen at the same time and can be compared with each other channel, it is possible to find a defect due to adjustment of the lighting and the detection unit, a defect in handling adjustment, and the like.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a device for carrying out the present invention.

FIG. 2 is an explanatory diagram showing a signal flow in the device.

FIG. 3 is an explanatory diagram of a chatter voltage, a hold voltage, a hold circuit output, and each signal.

FIG. 4 is an explanatory diagram showing an example of a data sheet.

Continued on front page F term (reference) 2F065 AA49 BB08 BB22 CC00 DD06 FF42 QQ23 QQ25 RR08 2G051 AA12 CA01 DA13 EA02 EA05 EA11 EA12 EA14 EB01 EC03 FA01

Claims (3)

[Claims] 1. A voltage waveform per bottle output from each of the vibration detection boards of a plurality of channels of an inspection machine is taken into a bottom hold circuit, and the lowest voltage value during the inspection timing is measured. The measured minimum voltage data is loaded into the maximum value data collection device, the analog value of the minimum voltage is converted to a digital value, the minimum voltage quantified is transferred to the computer, and each bottle and each channel are displayed on spreadsheet software. A data collection method for setting a judgment value of a glass bottle defect inspection machine, characterized in that it is described for each. 2. The data collection method according to claim 1, wherein the start, end, and reset operations of the bottom hold circuit are performed based on a timing signal received from the tester by a sequencer connected to the tester. Is controlled by the hold signal output to
A defect inspection of a glass bottle, wherein a data capturing operation of the maximum vibration data collecting apparatus is controlled by a capturing signal output to the collecting apparatus based on a timing signal received by the sequencer from the inspection machine. Data collection method for setting machine judgment values. 3. A method for setting a judgment value of a glass bottle defect inspection machine, wherein the judgment value is set based on data collected by the method according to claim 2 or 3.