JP4932395B2 - Pressure measurement sheet, pressure distribution measuring device, and pressure distribution measuring method - Google Patents

Description

  The present invention relates to a pressure measurement sheet, a pressure distribution measurement device including the pressure measurement sheet, and a pressure distribution measurement method.

  Patent Document 1 discloses a pressure distribution including a sheet-like polymer piezoelectric material that generates a voltage corresponding to a pressure on its surface when a pressure is applied, and a plurality of electrodes respectively formed on the upper and lower surfaces of the polymer piezoelectric material. A measuring sensor is described. In this pressure distribution measurement sensor, the electrode portion of the pressure distribution measurement sensor is sandwiched between two opposing rollers, and the portion of the polymer piezoelectric material sandwiched between each electrode via an analog multiplexer and a charge amplifier is used. By measuring the voltage according to the pressure received from the rollers, an accurate pressure distribution between the rollers can be obtained.

JP-A-5-248971

  In the pressure distribution measuring sensor described in Patent Document 1 described above, the voltage between the electrodes is sequentially measured via an analog multiplexer, and the pressure distribution in the rotational axis direction between the stationary rollers is measured. For example, when measuring the pressure distribution of the entire outer peripheral surface of the roller, a pressure distribution measurement sensor is sandwiched between the rollers, and after measuring the pressure distribution in the rotational axis direction between the rollers at this part, the roller is rotated slightly. The pressure distribution on the entire outer peripheral surface of the roller is measured by repeatedly measuring the pressure distribution in the direction of the rotation axis between the rollers at this stop portion. As described above, in the pressure distribution measuring sensor described in Patent Document 1, the pressure distribution cannot be continuously measured with respect to the entire outer peripheral surface of the roller. The problem arises that the measurement of the pressure distribution becomes very complicated.

  Accordingly, an object of the present invention is to provide a pressure measurement sheet, a pressure distribution measurement device, and a pressure distribution measurement method capable of measuring a dynamic pressure distribution.

  The pressure measurement sheet of the present invention includes a plurality of first electrodes that are long in one direction, a first sheet in which the plurality of first electrodes are arranged in parallel to each other and perpendicular to the one direction, and the one A plurality of second electrodes that are long in the direction and the plurality of second electrodes are arranged in parallel to each other and in a direction orthogonal to the one direction, and the first electrode and the second electrode face each other. As described above, the magnitude of the pressure applied through the first electrode or the second electrode formed between the second sheet bonded to the first sheet and the first and second electrodes facing each other. And a plurality of pressure-sensitive portions whose electrical characteristic values change, and a plurality of wirings connected to the plurality of first electrodes and the plurality of second electrodes, respectively. At least one of the plurality of first electrodes is provided with a plurality of slits that divide the first electrode at a predetermined distance from each other with respect to the one direction. A plurality of connection lines are formed to electrically connect the partial electrodes of the first electrode separated by.

  According to this, between the table and the screen of the screen printing apparatus or between the pair of rollers, the longitudinal direction of each electrode is the same as the moving direction of the squeegee and the transport direction sandwiched between the pair of rollers. By arranging the pressure measurement sheet in this manner, for example, it is possible to measure the dynamic pressure distribution on the squeegee table via the screen and the dynamic pressure distribution between the pair of rotating rollers. In addition, since the plurality of slits are provided at a predetermined distance in one direction, it is possible to measure the squeegee speed, the conveyance speed, and the like.

  In the present invention, it is preferable that the plurality of first and second electrodes are formed to have the same length in the one direction and are arranged at equal intervals in the orthogonal direction. Thereby, the measurement accuracy of the pressure distribution in one direction and the orthogonal direction is improved.

  Further, at this time, the plurality of slits may be provided in any one of the first electrode at the outermost side and the first electrode at the center in the orthogonal direction among the plurality of first electrodes. Thereby, when the some slit is provided in the 1st electrode in the center, a squeegee speed, a conveyance speed, etc. can be measured more reliably. Further, when the plurality of slits are provided on the outermost first electrode, measurement of the central pressure distribution is not hindered.

  At this time, the plurality of slits may be formed in all the first electrodes. Thereby, a squeegee speed, a conveyance speed, etc. can be measured still more reliably.

  At this time, the plurality of slits may be arranged in a staggered manner with respect to the one direction. Thereby, the measurement conditions of the pressure distribution by the plurality of slits become uniform, and the pressure distribution can be measured with high accuracy.

  The pressure distribution measuring device of the present invention corresponds to any of the pressure measurement sheets described above and the pressure applied to each of the plurality of pressure sensing units via the plurality of first electrodes or the plurality of second electrodes. An output circuit that outputs an electrical signal, and a moving speed along the one direction of a member that moves in the one direction while applying a pressure to a part of each of the plurality of first electrodes, or of the plurality of first electrodes The electric signal output from the output circuit is applied to the plurality of slits by determining the conveyance speed of the member that conveys the pressure measurement sheet in the one direction by rotating in the one direction while applying pressure to each part. Speed calculating means for calculating based on a plurality of times that change correspondingly and the predetermined distance is provided.

  According to this, between the table and the screen of the screen printing apparatus or between the pair of rollers, the longitudinal direction of each electrode is the same as the moving direction of the squeegee and the transport direction sandwiched between the pair of rollers. By arranging the pressure measurement sheet in this manner, for example, it is possible to measure the dynamic pressure distribution on the squeegee table via the screen and the dynamic pressure distribution between the pair of rotating rollers. In addition, it is possible to calculate a moving speed of a member (for example, a squeegee) that moves in one direction or a conveying speed of a member (for example, a roller) that conveys the pressure measurement sheet in the one direction by a speed calculating unit. Therefore, the moving speed of the member moving in one direction or the conveying speed of the member conveying the pressure measurement sheet in the one direction is separately measured by another speed measuring means, and the measured speed is manually input by the user. There is no need to do it.

  In the present invention, it is possible to identify output values for a plurality of regions that are equally divided in the one direction of the pressure sensitive unit based on the display and the electrical signal in each pressure sensitive unit output from the output circuit. It is preferable to further include display control means for displaying on the display. Thereby, it is possible to easily notify the user by displaying on the display which region of the pressure-sensitive portion the pressure balance is disturbed. Therefore, it becomes easy to determine the adjustment point of the applied pressure of the squeegee and the pair of rollers.

  The pressure distribution measurement method of the present invention includes a plurality of first electrodes that are long in one direction, a first sheet in which the plurality of first electrodes are arranged in parallel to each other and perpendicular to the one direction, A plurality of second electrodes elongated in one direction and the plurality of second electrodes are arranged in parallel to each other and in a direction perpendicular to the one direction, and the first electrode and the second electrode are opposed to each other. The pressure applied to the second sheet bonded to the first sheet and the first and second electrodes facing each other through the first electrode or the second electrode. Using a pressure measurement sheet having a plurality of pressure-sensitive portions whose electrical characteristic values change according to the length, and a plurality of wirings connected to the plurality of first electrodes and the plurality of second electrodes, respectively. In a pressure distribution measurement method for measuring pressure distribution, The pressure measurement at a position facing the screen on a flat table facing the squeegee across the screen of the screen printing apparatus so that the moving direction of the squeegee of the screen printing apparatus is parallel to the one direction. Placing the sheet, pressing the squeegee against a part of the pressure measurement sheet via the screen, and moving the squeegee in a direction parallel to the one direction after the pressing step; A pressure measuring step of measuring a pressure distribution applied from the squeegee to the table via the screen.

  According to this, it is possible to measure the dynamic pressure distribution on the squeegee table via the screen of the screen printing apparatus.

  In the present invention, at least one of the plurality of first electrodes is provided with a plurality of slits that divide the first electrode at a predetermined distance from each other in the one direction, and the first sheet includes It is preferable that a plurality of connection lines that electrically connect the partial electrodes of the first electrode divided by the slit are formed, and in the pressure measurement step, the squeegee passes through the plurality of slits. Accordingly, the plurality of slits are provided at a predetermined distance in one direction, and the moving speed of the squeegee can be measured by the squeegee passing through the plurality of slits.

  In another aspect of the pressure distribution measuring method of the present invention, a plurality of first electrodes elongated in one direction and the plurality of first electrodes are arranged in parallel to each other and in a direction perpendicular to the one direction. The first sheet, the plurality of second electrodes elongated in the one direction, and the plurality of second electrodes are arranged in parallel to each other and in a direction orthogonal to the one direction, the first electrode and the Formed between the second sheet bonded to the first sheet and the first and second electrodes facing each other such that the second electrode faces each other, and the first electrode or the second electrode interposed therebetween. A plurality of pressure-sensitive portions whose electrical characteristic values change according to the magnitude of the applied pressure, and a plurality of wirings connected to each of the plurality of first electrodes and the plurality of second electrodes. Pressure distribution meter that measures pressure distribution using a pressure measurement sheet In the method, a sandwiching step of sandwiching one end portion of the pressure measurement sheet between the pair of rollers so that a transport direction sandwiched between the pair of rollers and the one direction are parallel to each other; and After the holding step, pressure measurement is performed by measuring the applied pressure distribution applied to the pressure measurement sheet sandwiched between the rollers by rotating the pair of rollers so that the pressure measurement sheet is conveyed in the one direction. Process.

  According to this, it becomes possible to measure a dynamic pressure distribution between a pair of rotating rollers.

  In the present invention, at least one of the plurality of first electrodes is provided with a plurality of slits separating the first electrode at a predetermined distance from each other in the one direction. A plurality of connection lines are formed to electrically connect the partial electrodes of the first electrode divided by the slit, and the pair of rollers pass through the plurality of slits in the pressure measurement step. Is preferred. Thus, a plurality of slits are provided at a predetermined distance in one direction, and the conveyance speed of the pressure measurement sheet conveyed while being sandwiched between the pair of rollers is measured by the pair of rollers passing through the plurality of slits. can do.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a pressure distribution measuring apparatus employing a pressure measuring sheet according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. As shown in FIG. 1, the pressure distribution measuring apparatus 100 includes a sheet-like pressure measuring sheet 1 having a uniform thickness in which an electric resistance value partially changes according to an applied pressure, and the pressure measuring sheet 1. The output circuit 30 that converts the result obtained by the above into an electrical signal and outputs it, and the PC (Personal Computer) 50 that displays the pressure distribution in the pressure measurement sheet 1 from the electrical signal output from the output circuit 30 are included. .

  As shown in FIGS. 1 and 2, the pressure measurement sheet 1 includes two sheets 2 and 3 having a substantially rectangular plane shape having a longitudinal direction in the vertical direction in FIG. 1 and a lower surface of the sheet 2 (opposing the sheet 3. A plurality of electrodes (first electrodes) 4 formed on the surface 2a, and a plurality of electrodes (second electrodes) 5 formed on the upper surface (surface opposite to the sheet 2) 3a of the sheet 3. .

  In the present embodiment, the two sheets 2 and 3 both have the same size and the same planar shape, but the two sheets 2 and 3 may have different planar shapes and sizes. Further, the two sheets 2 and 3 are thinly formed so as to have flexibility, and both are made of polyethylene terephthalate resin. However, the material is not limited to this resin, and if it is a material having flexibility and insulation, Any material may be used.

  The electrode 4 extends along the longitudinal direction (direction parallel to one direction) of the sheet (first sheet) 2, and in the short side direction (left and right direction in FIG. 1) of the sheet 2 on the lower surface 2 a of the sheet 2. 8 in a direction perpendicular to the longitudinal direction). Of the eight electrodes 4, the two electrodes 4 positioned on the outermost side (both ends in the short direction of the sheet 2) with respect to the short direction of the sheet 2 have slits 10 for dividing the electrode 4 at both ends in the longitudinal direction of the electrode 4. One is formed in each part. These four slits 10 have the same separation distance in the longitudinal direction of the electrode 4 and are arranged symmetrically with respect to a center line parallel to the longitudinal direction of the sheet 2.

  A pressure sensitive portion 14 is formed on the entire lower surface 4a of each electrode 4 as shown in FIG. The pressure-sensitive portion 14 is filled with pressure-sensitive ink, and has a property that the electric resistance value decreases according to the pressure applied via the electrode 4 and / or the electrode 5.

  Four connection lines 11 corresponding to the slits 10 are formed on the lower surface 2 a of the sheet 2 to electrically connect the partial electrodes of the electrodes 4 divided by the slits 10. As shown in FIG. 1, two connection lines 11 that connect the partial electrodes of the electrode 4 formed at the left end of the sheet 2 are formed between the electrode 4 and the electrode 4 adjacent to the electrode 4. Yes. On the other hand, two connection lines 11 that connect the partial electrodes of the electrode 4 formed at the right end of the sheet 2 are formed on the outer side (right side) of the electrode 4.

  Further, as shown in FIG. 1, eight wirings 6 electrically connected to the lower ends of the respective electrodes 4 are formed on the lower surface 2 a of the sheet 2. Eight terminals 8 electrically connected to the output circuit 30 are formed at the lower end of the sheet 2. Each terminal 8 is electrically connected to each of the eight wires 6.

  As shown in FIGS. 1 and 2, the electrode 5 extends along the longitudinal direction of the sheet 3 in the same manner as the electrode 4, and the short side direction of the sheet 3 on the upper surface 3 a of the sheet (second sheet) 3. Eight are arranged at equal intervals. The electrode 5 is disposed at a position facing the electrode 4. In addition, the electrode 5 has the same planar shape and size as the electrode 4 in which the slit 10 is not formed. That is, both the electrode 5 and the electrode 4 have the same length in the longitudinal direction, and the width in the lateral direction is also the same.

  A pressure sensitive part 15 is formed on the entire upper surface 5a of each electrode 5. The pressure-sensitive part 15 has the same configuration as the pressure-sensitive part 14 described above, and is filled with pressure-sensitive ink. That is, the pressure-sensitive part 15 also has a property that the electric resistance value decreases according to the pressure applied through the electrode 4 and / or the electrode 5.

  As shown in FIG. 1, eight wirings 7 electrically connected to the lower ends of the electrodes 5 are formed on the upper surface 3 a of the sheet 3. Eight terminals 9 electrically connected to the output circuit 30 are formed at the lower end of the sheet 3. Each terminal 9 is electrically connected to each of the eight wires 7.

  As shown in FIG. 2, the pressure sensitive part 14 formed on the electrode 4 of the sheet 2 and the pressure sensitive part 15 formed on the electrode 5 of the sheet 3 are in close contact with each other as shown in FIG. The pressure measurement sheet 1 is configured by bonding the sheets 2 and 3 together.

  Next, the electrical configuration of the pressure distribution measuring apparatus 100 will be described with reference to FIGS. 1 and 3. FIG. 3 is a block diagram schematically showing an electrical configuration of the pressure distribution measuring apparatus shown in FIG. As shown in FIGS. 1 and 3, in the pressure distribution measuring apparatus 100, the terminals 8 and 9 of the pressure measuring sheet 1 are fitted to the connector 31 and electrically connected to the output circuit 30 via a plurality of wires 32. The output circuit 30 is connected to the PC 50 via a cable 33 and a connector 34.

  Here, the output circuit 30 will be described. As shown in FIG. 3, the output circuit 30 includes eight amplifiers 35 respectively connected to a plurality of wirings 32 connected to the connector 31, and an A / D converter 36 connected to the eight amplifiers 35. ing. The amplifier 35 amplifies the voltage between the electrodes 4 and 5 and sends it to the A / D converter 36. The A / D converter 36 converts the voltage amplified by the eight amplifiers 35 into a serial digital electric signal and sends it to the PC 50. The A / D converter 36 is connected to a cable 33 having a connector 34 at the tip, and the A / D converter 36 and the PC 50 are connected via the cable 33 and the connector 34.

  The PC 50 is a central processing unit (CPU), a ROM (Read Only Memory) that stores various programs and data, and a RAM (Random Access Memory) that temporarily stores data processed by the CPU. Etc.

As shown in FIG. 3, the PC 50 includes a display 51, a counter 52, a speed calculation unit (speed calculation unit) 53, and a display control unit (display control unit) 54. The display 51 displays a distribution of pressure applied to the pressure sensitive units 14 and 15. Counter 52 is
Elapsed time from when pressure is applied to each of the pressure sensing units 14 and 15 and an electric signal is sent from the output circuit 30 is measured.

  The speed calculation unit 53 includes a plurality of times at which the electrical signal output from the output circuit 30 changes corresponding to the slit 10 during the elapsed time measured by the counter 52, and between the two slits 10 in the longitudinal direction of the electrode 4. Based on the predetermined distance, the moving speed of the portion where pressure is applied to the pressure sensitive parts 14 and 15 along one direction parallel to the longitudinal direction of the pressure measurement sheet 1 is calculated. The moving speed of the applied portion is, for example, a squeegee speed that moves in one direction while applying pressure to a part of each of the pressure-sensitive parts 14 and 15 and a pressure applied to a part of each of the pressure-sensitive parts 14 and 15. However, it is the same as the conveying speed of the pair of rollers that convey the pressure measurement sheet 1 in one direction by rotating in one direction.

  The display control unit 54 includes a pressure distribution determination unit 61 and a storage unit 62 that stores a continuous electrical signal in which pressure is sequentially applied to a part of each of the pressure sensitive units 14 and 15. The pressure distribution determination unit 61 determines a plurality of regions a to l (described later) divided at equal intervals with respect to one direction (one direction parallel to the longitudinal direction) of each of the pressure sensitive units 14 and 15. And an identification display storage unit 64 that stores different displays according to a plurality of predetermined pressure ranges, and an average of the pressure values based on the electrical signal for each region determined by the region determination unit 63 is stored in the identification display storage. The identification for each region is determined while determining which predetermined pressure range stored in the unit 64 exists. Then, the display control unit 54 selects one region from among the electrical signal based on the determination result of the pressure distribution determination unit 61, the electrical signal stored in the storage unit 62, and the plurality of regions determined by the region determination unit 63. Is converted into data for display on the display 52.

  Next, a method for measuring the pressure distribution of the squeegee 125 applied to the table 121 in the screen printing apparatus 120 and the output result thereof will be described below. FIG. 4A is a diagram showing a situation where the pressure measurement sheet 1 is arranged on the table of the screen printing apparatus, and FIG. 4B shows a situation where the squeegee is pressed against the pressure measurement sheet via the screen. FIG. 4C is a diagram illustrating a state in which the squeegee is moved while being pressed against the pressure measurement sheet 1.

  As shown in FIG. 4A, the screen printing apparatus 120 according to the present embodiment partially includes a table 121 having a flat upper surface 121a, a screen 123 fixed to a frame-shaped frame 122, and an upper surface 123a of the screen 123. And a squeegee 125 that moves from the left to the right in the drawing. The squeegee 125 extends from the front side of the sheet of FIG. 4A toward the back, and the extension length is substantially the same as the length of the pressure measurement sheet 1 in the short direction.

  In order to measure the applied pressure distribution of the squeegee 125 with respect to the upper surface 121a of the table 121, the pressure measurement sheet 1 of the pressure distribution measuring device 100 is placed on the upper surface 121a of the table 121 as shown in FIG. Placing step). At this time, the pressure measurement sheet 1 is arranged so that the moving direction of the squeegee 125 (the direction of arrow A in FIG. 4C) and the longitudinal direction of the electrodes 4 and 5 are parallel, and the longitudinal direction of the pressure measurement sheet 1 One end (the end opposite to the end provided with the terminals 8 and 9) is arranged so as to face the squeegee 125 with the screen 123 interposed therebetween.

  Next, as shown in FIG. 4B, the squeegee 125 is moved downward, and the lower end of the squeegee 125 is pressed against one end of the pressure measurement sheet 1 via the screen 123 (pressing step). At this time, the PC 50 is activated so that the pressure measurement sheet 1 can measure the pressure applied by the squeegee 125. The PC 50 may be activated before the squeegee 125 is moved in the arrow A direction, such as before the pressure measurement sheet 1 is placed on the table 121. Then, after the PC 50 is activated, the pressure value applied by the squeegee 125 in the pressure measurement process described later is measured under how many times per second, that is, the pressure measurement sheet 1 is moved while being pressed by the squeegee 125. The user determines and inputs the condition of how many times the voltage between the electrodes 4 and 5 is measured per second. If this condition is determined and set in advance, it is not particularly necessary for the user to determine and input here. In this embodiment, it is possible to measure up to 200 times per second.

  Next, as shown in FIG. 4C, the squeegee 125 is moved in the direction of arrow A with the squeegee 125 pressing a part of the pressure measurement sheet 1 through the screen 123. At this time, the squeegee 125 is moved so that the slit 10 also passes from one end portion of all the electrodes 4 to the other end portion, and the pressure sensitive portions 14 and 15 between the one end portion and the other end portion of the electrode 4 are moved. The voltage between the sandwiched electrodes 4 and 5 is continuously measured a plurality of times (pressure measurement step).

  The electric signal indicating the voltage between the eight electrodes 4 and 5 (that is, eight channels (ch)) measured in the pressure measurement process is amplified by the amplifier 35 and continuously sent from the A / D converter 36 to the PC 50. Is output. The storage unit 62 stores the serial electrical signal output from the A / D converter 36. Here, when the continuous pressure value applied to the pressure sensitive units 14 and 15 by the squeegee 125 is displayed on the display 51, the display control unit 54 corresponds the electrical signal for each channel and the elapsed time by the counter 52. The data is converted into data that can be displayed on the display 51 and output to the display 51. In this way, as shown in FIG. 5, the continuous pressure value applied to each pressure-sensitive part 14, 15 showing the relationship between the continuous pressure value (vertical axis) and time (horizontal axis) of each channel. Is displayed on the display 51.

  1ch to 8ch shown in FIG. 5 respectively correspond to electric signals based on the voltages measured between the eight electrodes 4 and 5 shown in FIG. 1, and in this embodiment, 1ch is the leftmost in FIG. 8 ch is measured between the electrodes located on the rightmost side in FIG. 1. In addition, 2 to 7 ch correspond in order between six electrodes from the electrodes corresponding to 1 ch to the electrodes corresponding to 8 ch, that is, between the electrodes arranged from left to right in FIG. Measured between these electrodes.

  FIG. 5 shows 12 regions a to l divided in the horizontal axis direction. These areas a to l are divided into twelve areas a to l that are equally divided in the longitudinal direction of each of the pressure-sensitive parts 14 and 15 by a predetermined number (12 in the present embodiment) by the user. Is determined. As shown in FIG. 5, the pressure values of 1ch and 8ch in the regions b and k are drastically reduced as compared to the regions a, c, j, and l before and after that. This is because the voltage of this portion cannot be measured because the electrode 4 does not exist in the formation region of the slit 10. In other words, the portion where the pressure value suddenly decreases indicates the position of the slit 10, and the moving speed of the squeegee 125 can be calculated from the time at that time and the predetermined distance between the slits 10 as will be described later. Become. It should be noted that the width pressed by the lower end of the squeegee 125 is smaller than the width of the slit 10 in the longitudinal direction of the electrode 4. Thereby, when the squeegee 125 passes through the slit 10, a large pressure value drop is shown, and the speed calculation unit 53 can reliably calculate the moving speed of the squeegee 125.

  In the pressure measurement process, after the storage unit 62 stores the electrical signal, the speed calculation unit 53 determines the time between the two lower portions of the pressure value of 1ch or 8ch described above and the two slits 10 in the corresponding electrode 4. Based on the predetermined distance (separation distance), the moving speed of the squeegee 125 in the arrow A direction is calculated. Thus, by calculating the speed of the squeegee 125 by the speed calculation unit 53, it is not necessary to separately measure the moving speed of the squeegee by other speed measuring means and manually input the measured speed. .

  Further, when the distribution of the pressure applied to the pressure sensitive units 14 and 15 by the squeegee 125 is displayed on the display 51, the region determining unit 61 of the display control unit 54 selects the 12 regions a to l as described above. Based on the electrical signal determined and stored in the storage unit 62, the pressure distribution determination unit 61 stores the average pressure value for each region between the electrodes determined by the region determination unit 63 in the identification display storage unit 64. Determine which pressure range exists. Here, the display of the pressure distribution will be described below with reference to FIG. FIG. 6A is a diagram showing an identification display for each predetermined pressure range stored in the identification display storage unit 64, and FIG. 6B is a diagram showing a pressure distribution identified and displayed.

  As shown in FIG. 6A, the identification display storage unit 64 includes a range of reference value + (−31 or more), a range of reference value + (−30 to −11), and a reference value + (− 10 to +10). ), A reference value + (11 to 30) range, and a reference value + (+31 or more) range, respectively, different identification displays are stored.

  Then, based on the determination result of the pressure distribution determination unit 61, the display control unit 54 associates the identification display of each region a to l in each ch, converts it into data that can be displayed on the display 51, and outputs it to the display 51. . In this way, a display as shown in FIG. FIG. 6B shows 12 regions a to l in the vertical direction and 8 channels in the horizontal direction, and shows the pressure distribution in the plane of the pressure measurement sheet 1. Note that the pressure measurement sheet 1 is disposed on the table 121, and the pressure applied to the pressure measurement sheet 1 is substantially the same value as the pressure applied to the table 121. As shown in FIG. 6B, in ch3 to ch5, it is almost in the range of the reference value + (− 10 to +10), and in ch1 and ch2, it is in the range of the reference value + (− 30 to −11). , Ch6 to ch8 are substantially in the range of the reference value + (11 to 30). By performing the display shown in FIG. 6B as described above, the pressure applied to the table 121 by the squeegee 125 is larger on the one side (right side in FIG. 1) in the short direction of the pressure measurement sheet 1 and on the other side (in FIG. 1). The result that the left side) is small can be immediately grasped by the user. Therefore, it becomes easy for the user to make an accurate adjustment of the screen printing apparatus 120 based on the display result.

  As a modification, for example, the pressure distribution as shown in FIG. 6B is such that the pressure values of the areas a to c of the respective channels are in the range of the reference value + (− 30 to −11), and the areas of the respective channels. The pressure values of d to i are approximately in the range of the reference value + (− 10 to +10), and the pressure values of the regions j to l of the respective channels are approximately in the range of the reference value + (11 to 30). However, the user can quickly grasp that the applied pressure is small on the upstream side in the squeegee moving direction and that the applied pressure increases as the flow proceeds downstream. Even in such a modification, the user can easily adjust the screen printing apparatus 120 accurately as described above.

  Moreover, when displaying the pressure value of the selected specific area (area g in this embodiment) among the 12 areas a to l in each ch, the display control unit 54 is configured to display the pressure distribution determination unit 61. Based on the average pressure value for each area of each channel, the data is converted into data that can be displayed on the display 51 and output to the display 51. In this way, a bar graph indicating the pressure value of the region g in each channel is displayed on the display 51 as shown in FIG. FIG. 7 is a bar graph showing pressure values in a specific region in eight channels. As shown in FIG. 7, the display control unit 54 can display the pressure value for each region in all the channels on the display 51, so that the user can immediately grasp the pressure value balance in the selected specific region. Can do. For this reason, similarly to the above, it becomes easy for the user to accurately adjust the screen printing apparatus 120. Thus, the applied pressure distribution of the squeegee 125 with respect to the table 121 is measured and the result is displayed on the display 51.

  According to the pressure measurement sheet 1 and the pressure distribution measurement apparatus 100 according to the present embodiment as described above, the longitudinal direction of the electrodes 4 and 5 is the movement direction of the squeegee 125 between the table 121 and the screen 123 of the screen printing apparatus. By disposing the pressure measurement sheet 1 so as to be in the same direction, it is possible to measure a dynamic pressure distribution on the table 121 of the squeegee 125 via the screen 123. In addition, since the plurality of slits 10 are provided at a predetermined distance in one direction, the squeegee speed can be measured. Further, the moving speed of the squeegee 125 can be calculated by the speed calculator 53.

  In addition, since both the electrode 4 and the electrode 5 have the same length in the longitudinal direction and are arranged at equal intervals in the lateral direction (direction orthogonal to the longitudinal direction), the pressure distribution in the longitudinal direction and the lateral direction is measured. Accuracy is improved. Moreover, since the slit 10 is formed so as to divide the electrodes 4 located at both ends of the pressure measurement sheet 1 in the short direction, measurement of the central pressure distribution in the pressure measurement sheet 1 is not hindered.

  In addition, since the display control unit 54 displays the pressure distribution on the display 51, it is possible to easily notify the user in which region of the pressure sensitive units 14 and 15 the pressure balance is disturbed. Therefore, it becomes easy to determine the adjustment point of the applied pressure of the squeegee 125.

  Further, according to the pressure distribution measuring method of the present embodiment, in the pressure measuring step, the pressure measuring sheet 1 is moved while being pressed by the squeegee 125, so that the table of the squeegee 125 via the screen 123 of the screen printing apparatus 120. The dynamic pressure distribution for 121 can be measured. Further, the plurality of slits 10 are provided at a predetermined distance in one direction, and the moving speed of the squeegee 125 can be measured by the squeegee 125 passing through the plurality of slits 10.

  Next, a method for measuring the applied pressure distribution according to the second embodiment will be described below. In this embodiment, the applied pressure distribution between a pair of rollers is measured using the pressure distribution measuring apparatus 100 of the first embodiment. FIG. 8A is a diagram illustrating a state in which the pressure measurement sheet 1 of the pressure distribution measuring device 100 is sandwiched between a pair of rollers, and FIG. 8B is a diagram illustrating the pressure applied to the pressure measurement sheet 1 by rotating the pair of rollers. It is a figure which shows the condition conveyed while adding. In addition, about the thing similar to 1st Embodiment mentioned above, it shows with the same code | symbol and abbreviate | omits description.

  The pair of rollers 201 and 202 in the present embodiment are both rollers of the same size, and are urged and abutted in a direction approaching each other. Further, the length of the pair of rollers 201 and 202 in the central axis direction is slightly longer than the width of the pressure measurement sheet 1 in the short direction. In order to measure the applied pressure distribution between the pair of rollers 201 and 202, as shown in FIG. 8A, the end of the pressure measuring sheet 1 on the terminal side and the end of the electrodes 4 and 5 is used. Is sandwiched between a pair of rollers 201 and 202 (clamping process). At this time, the pressure measuring sheet 1 has a conveyance direction (arrow B direction) by rotation of the pair of rollers 201 and 202 (rotation in a direction parallel to the longitudinal direction of the electrodes 4 and 5) and a longitudinal direction of the electrodes 4 and 5. Arrange them so that they are parallel.

  At this time, the PC 50 is activated so that the pressure measurement sheet 1 can measure the applied pressure between the pair of rollers 201 and 202. And after starting PC50, a user determines and inputs the conditions of how many times the pressure value applied by a pair of rollers 201 and 202 is measured in 1 second in the pressure measurement process mentioned below.

  Next, as shown in FIG. 8B, the pair of rollers 201 and 202 are rotated so that the pressure measurement sheet 1 is conveyed in the direction of arrow B in the figure, and the pressure measurement sheet 1 is conveyed. At this time, the pair of rollers 201 and 202 rotate so that the slit 10 also passes from one end of all the electrodes 4 and 5 to the other end, and between the one end and the other end of the electrodes 4 and 5. The voltage between the electrodes 4 and 5 sandwiching the pressure sensitive parts 14 and 15 is continuously measured a plurality of times (pressure measurement process).

  As in the first embodiment, by displaying the pressure measurement result on the display 51, a dynamic pressure distribution can be measured between the pair of rotating rollers 201 and 202, and the pair of rollers. It becomes easy to accurately adjust the apparatus having 201 and 202. Further, since the configurations of the pressure measurement sheet 1 and the pressure distribution measurement device 100 are the same, it is possible to measure the conveyance speed by the pair of rollers 201 and 202 as in the first embodiment. Furthermore, the conveyance speed can be calculated by the speed calculation unit 53.

  Next, the pressure measurement sheet according to the third embodiment will be described below. FIG. 9 is a schematic plan view of a pressure measurement sheet according to the third embodiment of the present invention. In addition, about the thing similar to 1st Embodiment mentioned above, it attaches | subjects and abbreviate | omits description. As shown in FIG. 9, the pressure measurement sheet 301 in the present embodiment has substantially the same configuration as the pressure measurement sheet 1 in the first embodiment, but six electrodes 304 located at both ends in the short direction are provided. The slit 310 is formed, and the point is different from the first embodiment.

  The six slits 310 formed in the electrode 304 located at both ends are arranged at equal intervals along the longitudinal direction of the electrode 304. In addition, twelve connection lines 311 that electrically connect the partial electrodes of the electrode 304 divided by the slit 310 are formed in the pressure measurement sheet 301 corresponding to each slit. The slits 310 and the connection lines 311 are the same as those in the first embodiment, and only the numbers of formation are different.

  According to such a pressure measurement sheet 301, in addition to the effects of the first embodiment, it is possible to accurately measure the squeegee moving speed and the conveyance speed of the pressure measurement sheet 301 by the pair of rollers in the longitudinal direction of the pressure measurement sheet 301. it can. Furthermore, even when the pressure distribution of only the central portion in the longitudinal direction of the pressure measurement sheet 301 is measured, the squeegee moving speed and the conveyance speed of the pressure measurement sheet 301 by the pair of rollers can be measured.

  Next, the pressure measurement sheet according to the fourth embodiment will be described below. FIG. 10 is a schematic plan view of a pressure measurement sheet according to the fourth embodiment of the present invention. In addition, about the thing similar to 1st Embodiment mentioned above, it shows with the same code | symbol and abbreviate | omits description. As shown in FIG. 10, the pressure measurement sheet 401 in the present embodiment has substantially the same configuration as the pressure measurement sheet 1 in the first embodiment, but two slits 410 are formed in every electrode 404. This is different from the first embodiment.

  The pressure measurement sheet 401 is also formed with a connection line 411 corresponding to the slit 410. The slit 410 and the connection line 411 are the same as those in the first embodiment, and only the arrangement form and the number of formation are different. Thus, the slit 410 is formed also in the electrode 404 in the center in the short direction of the pressure measurement sheet 401, and the slit 410 is formed in all the electrodes 404, in addition to the effect of the first embodiment. Further, the squeegee speed, the conveyance speed, etc. can be measured more reliably.

  Next, the pressure measurement sheet according to the fifth embodiment will be described below. FIG. 11 is a schematic plan view of a pressure measurement sheet according to the fifth embodiment of the present invention. In addition, about the thing similar to 1st Embodiment mentioned above, it shows with the same code | symbol and abbreviate | omits description. As shown in FIG. 11, the pressure measurement sheet 501 in this embodiment has substantially the same configuration as the pressure measurement sheet 1 in the first embodiment, but six slits 510 are formed in all the electrodes 504. This is different from the first embodiment.

  The plurality of slits 510 are arranged in a staggered manner in the longitudinal direction of the pressure measurement sheet 501. Further, the six slits 510 formed in each electrode 504 are arranged at equal intervals along the longitudinal direction of the electrode 504. The pressure measurement sheet 501 is formed with a plurality of connection lines 511 corresponding to the respective slits 510 for electrically connecting the partial electrodes of the electrodes 504 divided by the slits 510. The slit 510 and the connection line 511 are the same as those in the first embodiment, and only the arrangement form and the number of formation are different. Thus, by arranging the plurality of slits 510 in a staggered manner, the pressure distribution measurement conditions in the pressure measurement sheet 501 become uniform, and the pressure distribution can be measured with high accuracy. In addition, even if the squeegee 125 and the pair of rollers 201 and 202 pass through the slit 510 in the plurality of electrodes 504 excluding the electrodes 504 formed at both ends in the short direction of the pressure measurement sheet 501, the pressure measurement sheet 501 is short. Since the electrode 504 exists at a position adjacent to the slit 510 with respect to the hand direction, a pressure value that is not measured by the slit 510 can be interpolated by the pressure value measured by the electrode 504. In addition, in all the slits described above, if an electrode is present at a position adjacent to the slit in the short direction of the pressure measurement sheet, a pressure value not measured by the slit is interpolated based on a voltage measured between the electrodes. Is possible.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the plurality of slits may be formed in any of the electrodes of the pressure measurement sheet. Moreover, the electrode 4 and the electrode 5 do not need to have the same length. Moreover, the electrode 4 and the electrode 5 should just oppose, and the pressure measurement sheet | seat 1 does not need to be arrange | positioned at equal intervals in the transversal direction. Further, the pressure-sensitive part may be formed only on one of the electrode 4 and the electrode 5 as long as it is formed between the electrodes.

It is a schematic block diagram of the pressure distribution measuring device by which the pressure measuring sheet by 1st Embodiment of this invention was employ | adopted. It is sectional drawing along the II-II line | wire shown in FIG. FIG. 2 is a block diagram schematically showing an electrical configuration of the pressure distribution measuring apparatus shown in FIG. 1. (A) is a figure which shows the condition where the pressure measurement sheet was arrange | positioned on the table of a screen printing apparatus, (b) is a figure which shows the condition which pressed the squeegee against the pressure measurement sheet through the screen, (c ) Is a diagram showing a situation in which the squeegee is moved while being pressed against the pressure measurement sheet. It is the graph by which the relationship between the continuous pressure value of each ch and time was shown. (A) is a figure which shows the identification display for every predetermined pressure range which an identification display memory | storage part memorize | stores, (b) is a figure which shows the pressure distribution identified and displayed. It is a bar graph which shows the pressure value of the specific area | region in 8 ch. (A) is a figure which shows the condition which pinched | interposed the pressure measurement sheet | seat of the pressure distribution measuring apparatus between a pair of rollers, (b) is the state conveyed while applying a pressure to a pressure measurement sheet by rotating a pair of roller. FIG. It is a schematic plan view of the pressure measurement sheet | seat by 3rd Embodiment of this invention. It is a schematic plan view of the pressure measurement sheet | seat by 4th Embodiment of this invention. It is a schematic plan view of the pressure measurement sheet | seat by 5th Embodiment of this invention.

Explanation of symbols

1, 301, 401, 501 Pressure measurement sheet 2 sheet (first sheet)
3 sheets (second sheet)
4 electrodes (first electrode)
5 electrodes (second electrode)
6,7 Wiring 10,310,410,510 Slit 11,311,411,511 Connection line 14,15 Pressure sensitive part 30 Output circuit 51 Display 53 Speed calculation part (speed calculation means)
54 Display control unit (display control means)
100 Pressure distribution measuring device 120 Screen printing device 121 Table 123 Screen 125 Squeegee 201, 202 Roller

Claims (11)

A plurality of first electrodes elongated in one direction;
A first sheet in which the plurality of first electrodes are arranged in parallel to each other and in a direction perpendicular to the one direction;
A plurality of second electrodes elongated in the one direction;
The plurality of second electrodes are arranged in parallel to each other and in a direction perpendicular to the one direction, and the second electrode is bonded to the first sheet so that the first electrode and the second electrode face each other. Sheet,
A plurality of pressure-sensitive elements that are formed between the first and second electrodes facing each other and whose electrical characteristic values change according to the magnitude of the pressure applied via the first electrode or the second electrode. And
A plurality of wirings connected to each of the plurality of first electrodes and the plurality of second electrodes;
At least one of the plurality of first electrodes is provided with a plurality of slits separating the first electrode at a predetermined distance from each other in the one direction,
The pressure measurement sheet, wherein the first sheet is formed with a plurality of connection lines that electrically connect the partial electrodes of the first electrode divided by the slit.   2. The pressure according to claim 1, wherein the plurality of first and second electrodes are formed to have the same length in the one direction and are arranged at equal intervals in the orthogonal direction. Measurement sheet.   The plurality of slits are provided in any one of the first electrode at the outermost side and the first electrode at the center in the orthogonal direction among the plurality of first electrodes. The pressure measurement sheet described.   The pressure measurement sheet according to claim 3, wherein the plurality of slits are formed in all the first electrodes.   The pressure measurement sheet according to claim 4, wherein the plurality of slits are arranged in a staggered manner with respect to the one direction. The pressure measurement sheet according to any one of claims 1 to 5,
An output circuit that outputs an electrical signal corresponding to a pressure applied to each of the plurality of pressure-sensitive parts via the plurality of first electrodes or the plurality of second electrodes;
The moving speed along the one direction of the member moving in the one direction while applying pressure to each part of the plurality of first electrodes, or the pressure while applying pressure to each part of the plurality of first electrodes. A plurality of times at which the electrical signal output from the output circuit changes in correspondence with the plurality of slits, a conveyance speed of a member that conveys the pressure measurement sheet in the one direction by rotating in one direction; A pressure distribution measuring device comprising: a speed calculating means for calculating based on the predetermined distance. Display,
Display control for causing the display to display the output values for each of a plurality of regions equally divided in the one direction of the pressure-sensitive part based on the electrical signal output from the output circuit. The pressure distribution measuring device according to claim 6, further comprising: means. A plurality of first electrodes elongated in one direction, a first sheet in which the plurality of first electrodes are arranged in parallel to each other and perpendicular to the one direction, and a plurality of first electrodes elongated in the one direction The two electrodes and the plurality of second electrodes are arranged in parallel to each other and in a direction orthogonal to the one direction, and are attached to the first sheet so that the first electrode and the second electrode face each other. An electrical characteristic value corresponding to the magnitude of the pressure applied through the first electrode or the second electrode, formed between the combined second sheet and the opposing first and second electrodes. Pressure distribution measuring method for measuring pressure distribution using a pressure measurement sheet having a plurality of pressure-sensitive parts with variable pressure and a plurality of wirings connected to each of the plurality of first electrodes and the plurality of second electrodes In
The pressure measurement sheet at a position facing the screen on a flat table facing the squeegee across the screen of the screen printing apparatus so that the moving direction of the squeegee of the screen printing apparatus is parallel to the one direction. A mounting process for mounting;
A pressing step of pressing the squeegee against a part of the pressure measurement sheet through the screen;
A pressure measuring step of measuring the distribution of pressure applied from the squeegee to the table via the screen by moving the squeegee in a direction parallel to the one direction after the pressing step. Pressure distribution measurement method. At least one of the plurality of first electrodes is provided with a plurality of slits separating the first electrode at a predetermined distance from each other in the one direction,
The first sheet is formed with a plurality of connection lines that electrically connect the partial electrodes of the first electrode divided by the slit,
The pressure distribution measuring method according to claim 8, wherein in the pressure measuring step, the squeegee passes through the plurality of slits. A plurality of first electrodes elongated in one direction, a first sheet in which the plurality of first electrodes are arranged in parallel to each other and perpendicular to the one direction, and a plurality of first electrodes elongated in the one direction The two electrodes and the plurality of second electrodes are arranged in parallel to each other and in a direction orthogonal to the one direction, and are attached to the first sheet so that the first electrode and the second electrode face each other. An electrical characteristic value corresponding to the magnitude of the pressure applied through the first electrode or the second electrode, formed between the combined second sheet and the opposing first and second electrodes. Pressure distribution measuring method for measuring pressure distribution using a pressure measurement sheet having a plurality of pressure-sensitive parts with variable pressure and a plurality of wirings connected to each of the plurality of first electrodes and the plurality of second electrodes In
A sandwiching step of sandwiching one end of the pressure measurement sheet between the pair of rollers so that the transport direction sandwiched between the pair of rollers and the one direction are parallel to each other;
After the nipping step, the pair of rollers are rotated so that the pressure measurement sheet is conveyed in the one direction, and an applied pressure distribution applied to the pressure measurement sheet sandwiched between the rollers is measured. A pressure distribution measuring method comprising: a pressure measuring step. At least one of the plurality of first electrodes is provided with a plurality of slits separating the first electrode at a predetermined distance from each other in the one direction,
The first sheet is formed with a plurality of connection lines that electrically connect the partial electrodes of the first electrode divided by the slit,
The pressure distribution measuring method according to claim 10, wherein, in the pressure measuring step, the pair of rollers passes through the plurality of slits.

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