EP0275175A2 - Vorrichtung zur Parameterkontrolle während einer Filmentwicklung - Google Patents

Vorrichtung zur Parameterkontrolle während einer Filmentwicklung Download PDF

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Publication number
EP0275175A2
EP0275175A2 EP88300212A EP88300212A EP0275175A2 EP 0275175 A2 EP0275175 A2 EP 0275175A2 EP 88300212 A EP88300212 A EP 88300212A EP 88300212 A EP88300212 A EP 88300212A EP 0275175 A2 EP0275175 A2 EP 0275175A2
Authority
EP
European Patent Office
Prior art keywords
processing
signals
parameters
film
values
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88300212A
Other languages
English (en)
French (fr)
Other versions
EP0275175A3 (de
Inventor
Bryan Johnson
Charles Staff
Peter Charles Staff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
X-OGRAPH Ltd
Original Assignee
X-OGRAPH Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by X-OGRAPH Ltd filed Critical X-OGRAPH Ltd
Publication of EP0275175A2 publication Critical patent/EP0275175A2/de
Publication of EP0275175A3 publication Critical patent/EP0275175A3/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
    • G03D13/007—Processing control, e.g. test strip, timing devices

Definitions

  • the majority of X-ray films are currently passed through automatic film processing equipment in order to produce the final diagnostic radiograph.
  • the radiographs must be of the highest consistent quality. Therefore, quality control of the film passing through the processing equipment is vital.
  • the method of carrying out these checks is to stop the flow of work, which in medical radiography results in the hold-up of patient examinations, in order that the operator may open up the processing equipment and carry out tests. This is time consuming as well as requiring an understanding of the working of the equipment.
  • a device for use in monitoring parameters during the processing of a film comprising:-
  • a distribution circuit board 1 is disposed in use in X-ray film processing equipment.
  • the distribution circuit board 1 carries power supply circuitry 2 which is fed from an alternating current supply and provides +12 volts and -5 volts power supples.
  • Reference numeral 3 denotes a main circuit board in a hand-held monitoring device.
  • the main circuit board 3 is connected to the distribution circuit board 1 via a 20-way ribbon cable, the latter providing for four digital inputs as schematically denoted by single line 4, eight analogue inputs as schematically denoted by single line 5 and power lines as schematically denoted by single line 6.
  • a probe 7 for monitoring the pH value of the developer Installed within the processing equipment are a probe 7 for monitoring the pH value of the developer, a probe 8 responsive to the pH value of the fixer (the probes 7 and 8 producing voltage outputs), a sensor 9 responsive to the temperature of the developer, a sensor 10 responsive to the equipment's front dryer temperature, a sensor 11 responsive to the equipment's rear dryer temperature (the sensors 9, 10 and 11 producing current outputs), a sensor 12 responsive to the flow rate of the developer and a sensor 13 responsive to the flow rate of the fixer (the sensors 12 and 13 producing digital, pulse outputs).
  • the outputs of the probes 7 and 8 are connected via high impedance amplifiers 14 and 15 on the distribution circuit board 1 to respective ones of the eight analogue inputs to the main circuit board 3.
  • the outputs of sensors 9, 10 and 11 are connected via the distribution circuit board 1 to respective ones of three others of the analogue inputs to the main circuit board 3.
  • the outputs of sensors 12 and 13 are connected via the distribution circuit board 1 to respective ones of the digital inputs to the main circuit board 3.
  • the distribution circuit board 1 (which acts as interface means between sensing means and the hand-held device) has, in fact, eight inputs for receiving outputs from analogue sensing means, in the present example five of them being used and the other three (not shown) being spare. Also, the distribution circuit board 1 has four inputs for receiving outputs from digital sensing means, in the present example two of them being used and the other two (not shown) being spare.
  • a regulator 16 for providing +5 volts operating power for digital circuitry on the board 3
  • a device 17 for providing a +5 volts reference voltage for operating signal conditioning circuitry 18 and an analogue to digital converter 19 on the board 3.
  • the signal conditioning circuitry 18 is adapted for handling eight analogue and four digital channels and the analogue to digital converter 19 is an 8-channel, 8-bit analogue to digital converter with an integral 8-channel analogue multiplexer.
  • the +5 volts operating power is also fed back on one of the power lines 6 via the 20-way ribbon cable for operation of the sensors 12 and 13 and as one of the operating voltages for amplifiers 14 and 15 (the -5 volts from circuitry 2 being the other voltage for these amplifiers). Also, the +12 volts from circuitry 2 is used for operation of sensors 9, 10 and 11, the probes 7 and 8 being passive probes.
  • the eight analogue inputs and the four digital inputs of the 20-way ribbon cable are connected to respective inputs of the signal conditioning circuitry 18.
  • circuitry 18 subjects them to amplification with a gain of one and subsequent filtering; as regards the current outputs from sensors 9, 10 and 11 it subjects them to current to voltage conversion together with an offset to compensate for ambient temperature followed by filtering; and as regards the digital outputs from sensors 12 and 13, it subjects them to the operation of pull-up resistors followed by filtering.
  • the five analogue signals are passed from circuitry 18 via respective lines of an eight line bus 20 to the converter 19.
  • the main circuit board 3 further carries a 4-channel counter/timer 21 and parallel input/output circuitry 22, the two digital signals applied to circuitry 18 being passed to counter/timer circuitry 21 via respective lines of four lines bus 23, the other two lines of which are connected as spare lines to respective input pins of the parallel input/output circuitry 22 for providing an option for dealing with other functions.
  • the main circuit board 3 further carries a CMOSZ80 central processing unit (CPU) 24 running under the control of a 2 MHz clock 25, an address decoder 26, a 2 kB static random access memory (RAM) 27 and a 16 kB erasable programmable read-only memory (EPROM) 28, the latter storing the necessary operating program.
  • the output signals of the converter 19 and counter/timer 21 are stored in the RAM 27 via a processor bus 29, under the control of the processing unit 24, address decoder 26 and parallel input/output circuitry 22.
  • the converter 19 scans its inputs sequentially and provides an indication on a line 30 to the parallel input/output circuitry 22 each time it finishes a particular analogue to digital conversion.
  • the RAM 27 signals related to: the pH of the developer; the pH of the fixer; the temperature of the developer; dryer temperature (obtained by taking the average of the results from the front dryer temperature sensor 10 and the rear dryer temperature sensor 11); the amount of developer which has flowed (obtained by counting pulses from sensor 12 for a specific period); and the amount of fixer which has flowed (obtained by counting pulses from the sensor 17 for the specific period).
  • the hand-held device further has a display board 31 for displaying the values of the foregoing parameters. More particularly, the display board 31 has: three 7-­segment light emissive diode (LED) displays 32, 33 and 34 and three LEDs 32a, 33a, and 34a before respective ones of displays 32, 33 and 34 for indicting a decimal point when energised. Also, the display board 31 has three LEDs 35, 36 and 37 with legends alongside them as shown; and three LEDs 38, 39 and 40 with legends alongside them as shown. The LEDs of board 31 are energised via respective ones of display latches in block 41 via processor bus 29.
  • LEDs of board 31 are energised via respective ones of display latches in block 41 via processor bus 29.
  • the hand-held device also has a manually operable 4 x 3 keypad 42 having keys numbered or marked as shown in Figure 2, with the upper row having the legend DEV. (i.e. developer) alongside it, the second row down having the legend FIX. (i.e. fixer) alongside it, the third row down having the legend DRY. (i.e. dryer) alongside it, the left-hand column having the legend TEMP. (i.e. temperature) above it, the middle column having the legend pH above it and the right-hand column having the legend FLOW above it.
  • DEV. i.e. developer
  • FIX. i.e. fixer
  • DRY. i.e. dryer
  • the value in degrees Centigrade (°C) of the dryer temperature will be displayed (the LEDs 37 and 38 being energised to indicate this); by pressing the key numbered 5, the value of the pH of the fixer will be displayed (the LEDs 36 and 39 being energised to indicate this); by pressing the key numbered 6, the value in millilitres (mL) of the flow of fixer will be displayed (the LEDs 36 and 40 being energised to indicate this); by pressing the key numbered 7, the value in degrees Centigrade of the developer temperature will be displayed (the LEDs 35 and 38 being energised to indicate this); by pressing the key numbered 8, the value of the pH of the developer will be displayed (the LEDs 35 and 39 being energised to indicate this); and by pressing the key numbered 9, the value in millilitres of the flow of developer, will be displayed (the LEDs 35 and 40 being energised to indicate this).
  • a 256 bit non-­volatile electrically erasable programmable read-only memory 43 which stores appropriate calibration factors and is connected with circuitry 22 via a four line bus 44.
  • a sounder 45 for producing an audible sound as will be described below.
  • the developer and fixer baths operate at about 32°C, and the dryers operate at about 55°C.
  • the converter 19 spans a 25°C range around these values with a resolution of 0.1°C, the display resolution being in 0.1°C increments.
  • the pH probes 7 and 8 would cover a range from 0 to 14 in value, the developer having a pH of about 10.5 and the fixer a pH of about 5.5. If the converter 19 has a span of 2 to 13 this would give a resolution of 0.05 pH. Display resolution could be typically in 0.1pH increments.
  • the display resolution for flow could be in 1 mL increments.
  • Eachs of the temperature sensors 9, 10 and 11 produces an output proportional to absolute temperature and the output at room temperature needs to be offset to cover the required range.
  • the pH probes 7 and 8 need an offset to enable their bipolar outputs to be measured by the unipolar converter 19.
  • This offset voltage is 1/2 full scale of the converter 19 to give an equal range about the normal operating point. Any errors in this voltage are corrected by the calibration routine which will be described below.
  • Readings from the probes 7 and 8 and sensors 9, 10, 11, 12 and 13 are taken continuously, and an average calculated for each of the temperature and pH channels.
  • the start and stop of flow is determined, and the volume for each film processes is calculated.
  • Pressing the appropriate key on keypad 42 displays the value of the relevant parameter. Five seconds after the key is released, the circuitry of the display board 31 returns to a standby mode where only the centre segment of the middle display 33 is energised, unless another valid key is pressed in which case the value of the new parameter is displayed.
  • Pressing a valid temperature or pH key causes a short sound from sounder 45 and the measured value is displayed for 5 seconds. Holding the key pressed gives a continuous display.
  • Pressing a flow key causes a short sound from the sounder 45, and the display shows 0.
  • Feeding in a film operates the replenishment pumps, and the display counts up the volume of liquid passed. After the pumps stop, the display remains for 20 seconds. If another film is inserted during this time, the display continues counting, enabling the average volume per film to be determined.
  • Pressing an invalid key for example key 2 (DRY. pH) results in a long sound from sounder 45 and no display.
  • a calibration routine may be used whereby each of probes 7 and 8 and sensors 9, 10, 11, 12 and 13 is subjected to a known condition, and the measured value entered into the device, calibration factors for correction of future signals being stored in the non-volatile memory 43.
  • an independent reference is required for the parameter being measured. This would normally be a thermometer for temperature, a pH meter or buffer solution for the pH probes and a measuring cylinder or similar for flow.
  • the reference accuracy should better than the accuracy required from the hand-held device.
  • the processing equipment should be allowed to stabilise for 30 minutes after reaching normal operating conditions.
  • a reference thermometer is immersed in the developer bath and the key marked CAL. and then key 7 (DEV.TEMP.) pressed.
  • a particular value will be displayed and if this is not correct, the correct value is entered (e.g. 32.3) via the keypad 42.
  • the entered value then flashes on the display board 31.
  • CAL. is pressed and then the security code (e.g. 123) is entered via the keypad 42.
  • the device reverts to the standby mode, and a new DEV.TEMP. reading should now agree with the reference.
  • the calibration is aborted if the correct key is not pressed within a certain time. Entering an incorrect security code results in "Err" being displayed via displays 32, 33 and 34, and calibration is aborted.
  • the simplest way to achieve this is to connect a wire to the metalwork of the equipment, with the other end dipping in the buffer solution. Note that the buffer solution should be at approximately the same temperature as the bath solutions. Whichever method is used to obtain the reference value, the calibration method proceeds as before.
  • the replenishment pipes of the processing equipment should be positioned to discharge into a suitable measuring cylinder. CAL. is pressed and then a flow key.
  • the displays 32, 33 and 34 read 0.
  • the processing equipment's pumps are activated by inserting a film. Several films should be used to pump a reasonable volume (say 250 mL) into a measuring cylinder. The device will count up the total volume passed. The volume in the cylinder should be accurately noted, and this value keyed into the device as previously.
  • the device reverts to the standby mode if no key is pressed for 60 seconds, and any calibration changes are ignored.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
EP88300212A 1987-01-14 1988-01-12 Vorrichtung zur Parameterkontrolle während einer Filmentwicklung Withdrawn EP0275175A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8700749 1987-01-14
GB878700749A GB8700749D0 (en) 1987-01-14 1987-01-14 Monitoring parameters during processing of film

Publications (2)

Publication Number Publication Date
EP0275175A2 true EP0275175A2 (de) 1988-07-20
EP0275175A3 EP0275175A3 (de) 1989-12-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88300212A Withdrawn EP0275175A3 (de) 1987-01-14 1988-01-12 Vorrichtung zur Parameterkontrolle während einer Filmentwicklung

Country Status (3)

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EP (1) EP0275175A3 (de)
JP (1) JPS63193149A (de)
GB (2) GB8700749D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450462A2 (de) * 1990-04-04 1991-10-09 Eastman Kodak Company System zur Softwareaktualisierung in einem automatischen Filmentwicklungsgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332456A (en) * 1980-07-14 1982-06-01 Pako Corporation Graphic arts processor having switch selectable replenishment control information matrices
JPS58127943A (ja) * 1982-01-27 1983-07-30 Canon Inc 複写装置
JPS60115936A (ja) * 1983-11-28 1985-06-22 Konishiroku Photo Ind Co Ltd 自動現像機の表示装置
JPS60115938A (ja) * 1983-11-28 1985-06-22 Konishiroku Photo Ind Co Ltd 自動現像機の現像乾燥温度制御装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8423369D0 (en) * 1984-09-15 1984-10-17 Snell J D Monitoring of liquids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332456A (en) * 1980-07-14 1982-06-01 Pako Corporation Graphic arts processor having switch selectable replenishment control information matrices
JPS58127943A (ja) * 1982-01-27 1983-07-30 Canon Inc 複写装置
JPS60115936A (ja) * 1983-11-28 1985-06-22 Konishiroku Photo Ind Co Ltd 自動現像機の表示装置
JPS60115938A (ja) * 1983-11-28 1985-06-22 Konishiroku Photo Ind Co Ltd 自動現像機の現像乾燥温度制御装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 241 (P-232)[1386], 26th October 1983; & JP-A-58 127 943 (CANON K.K.) 30-07-1983 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 269 (P-400)[1992], 26th October 1985; & JP-A-60 115 936 (KONISHIROKU SHASHIN KOGYO K.K.) 22-06-1985 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 269 (P-400)[1992], 26th October 1985; & JP-A-60 115 938 (KONISHIROKU SHASHIN KOGYO K.K.) 22-06-1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450462A2 (de) * 1990-04-04 1991-10-09 Eastman Kodak Company System zur Softwareaktualisierung in einem automatischen Filmentwicklungsgerät
EP0450462A3 (en) * 1990-04-04 1992-07-22 Eastman Kodak Company System for updating software in automatic film processor

Also Published As

Publication number Publication date
GB8800556D0 (en) 1988-02-10
GB8700749D0 (en) 1987-02-18
GB2199955A (en) 1988-07-20
JPS63193149A (ja) 1988-08-10
EP0275175A3 (de) 1989-12-20

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