JP2018028495A - Integrated positioning load sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated positioning load sensor which offers error prevention and stabilization of a position detection function of a tracking system, reduction in price of the expensive sensor, easier sensor mounting procedure, and simplified and more efficient manufacturing procedure.SOLUTION: An integrated positioning load sensor is obtained by integrating two load sensors mounted on each tile carpet of a tracking system. The integrated positioning load sensor may be of a type with two sensors that are simply stacked together, or a type with a plurality of load sensors that are integrated together by dividing a resistor on a pressure sensitive surface to form a divided surface pattern in order to achieve more complete integration.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an integrated load sensor for positioning suitable for a watching system.

According to estimates from the Ministry of Health, Labor and Welfare, the number of people with dementia is expected to increase from about 5.2 million in 2015 to about 7 million in 2025. According to the National Police Agency summary, the number of people missing in 2013 exceeded 10,000, and in 2015 it exceeded 12,000. There are 479 confirmed deaths. The problem is that the number of missing and confirmed deaths has been the highest for three consecutive years.
In order to solve these problems, various systems using GPS (Global Positioning System) technology have been developed for watching and tracking outdoors. However, in the indoor watch development, the GPS technology cannot be used, and the development and application of the optimum sensor technology was delayed, so there were few indoor watch system developments. Thus, by using one to a plurality of tile carpets with a film load sensor by the present inventor so far, it is possible to directly measure in real time while the position of the person to be watched over is unconstrained and the person does not know. A watch system has been developed. As the application research of these technologies progresses, for example, it will be easy to objectively evaluate the changing conditions and lifestyle of dementia, and find improvements. Therefore, it is expected to be effective for basic data accumulation and big data analysis that lead to the extension of healthy life expectancy. Among them, as a result of examination and trial production centering on the mounting and use of a new load sensor that has not existed before, it is closely related to the position detection sensor of the monitoring system, and further improvements such as system stability and cost The problem has become clear.

Japanese Patent No. 5681933 Utility Model Registration No. 3166532

IEICE technical report MICT2014-83

It has become clear that the tile carpet sensors with load sensors that have been developed so far have the following problems to be improved. From the examination results so far, it was disclosed that if this tile carpet is used, the watching system can be easily configured.
(Patent No. 5681933). That is, as shown in FIG. 1, when the position of each tile carpet of a tile carpet spread on a two-dimensional floor is specified by the XY coordinates, two load sensors on one tile carpet are used. One of the load sensors is connected to the adjacent tile carpet in the Y direction (hereinafter referred to as Xn series, n is an integer of 1, 2, 3, ...), and the other load sensor is the adjacent tile carpet in the X direction. (Hereinafter referred to as Yn system, where n is an integer of 1, 2, 3,...). In this way, the load sensor is divided and connected to two systems of Xn system and Yn system. At this time, the signal lines connected and connected in the respective systems can be regarded as signal lines in which resistors as load sensors are connected in parallel. In this way, when a person gets on a specific tile carpet, the position of the person is detected by the load applied to the load sensor mounted on the carpet. This is based on the principle that it can be detected as a tile carpet at a position where a series of linearly connected Xn-direction signal lines and Yn-direction signal lines intersect, using a high-speed scan detection technique for connected signal lines. Here, it is desirable that the two load sensors on one tile carpet detect the load at the same time regardless of the position on the tile carpet. However, as will be described below based on previous studies, even when a load is applied to the periphery of one tile carpet or when a load is applied across adjacent tile carpets, the detection timing shifts. In some cases, the load cannot be detected at the same time. Specifically, since the minimum installation area necessary for installing the load sensor is indispensable for the place where the two load sensors are installed (that is, the installation position on the same tile carpet), install at least the minimum installation area. The position is shifted. Furthermore, in addition to this problem, there may be a slight timing difference between the two load sensors due to the positional variation and fluctuation of the load distribution effect. As described above, there are cases where the load cannot be detected almost simultaneously even if the sensitivity of the sensor is the same because there is a positional difference between the part where the load is first applied and the load sensor installation position. I understood.

Next, in the prior art shown below, the problem of a tile carpet with a load sensor is shown. In the watching and tracking system using the film sensor technology that has been studied in the past (Utility Model Registration No. 3166532: “Unauthorized Outing Check Device”), short-circuit / continuity between electrode line patterns is applied to position detection. There is a problem in that dust or dust accumulates in the pattern via the power supply of the sensor, causing malfunction or instability of position detection. In addition, if the sensor pattern is made minute, there is a problem that malfunctions in position detection increase. Similarly, when no load is applied, position detection malfunctions and becomes unstable when a load is applied to any one of the load sensor installation positions shown in Patent Document 1 if dust or dust is applied. A point is considered. Traditionally developed tile carpet with load sensor
(Technical Report of the Institute of Electronics, Information and Communication Engineers MICT2014-83) is based on the original principle that it can be detected as a tile carpet at a position where a series of linearly connected Xn direction signal lines and Yn direction signal lines intersect. Here, in addition to the above-mentioned problems such as dust and dust in the pressure sensor of the load sensor, the real-time property of the new position detection function (in other words, the high-speed position detection and the load detection time difference of the sensor, etc.) It has become clear that the problem of detecting the load at the same time is more difficult to solve.

The integrated load sensor for positioning according to the present invention solves the problems of the conventional sensor technology as described above. In other words, in the prior art, two load sensors on one tile carpet detect the load at the same time regardless of the position on the tile carpet. However, there are cases where simultaneous detection cannot be performed because of the load propagation distance and operation time difference from the position / time point where the load is applied to the installation position of each detection sensor. Considering that the position detection technology under development is an indispensable technology for real-time position detection that achieves a high-speed scanning function that is not expected in the prior art, the cause of such problems occurs Further improvements in detection are essential. That is, a positioning load sensor has not existed conventionally. This is the first development of a new elderly indoor monitoring system that has revealed the necessary functions of a load sensor for positioning. From the above examination results, it was practically difficult to develop and put into practical use a stable real-time monitoring system. Therefore, the present invention has a distance and time difference from the position at which the load of the person to be watched is applied to the tile carpet at that time to the detection time at the position where the load is applied to each of the two load sensors. It is improved so as to be as small as possible so that the load can be detected almost simultaneously. The present invention (the first integrated load sensor for positioning) is specifically intended to develop a new sensor that has not been obtained by integrating the two load sensors having the same specifications described above. is there. Still another object of the present invention (second integrated load sensor for positioning) is to develop a novel sensor having a two-dimensional resistor pressure-sensitive surface division arrangement as a result of exploring this improvement. In addition, using the integrated load sensor of the present invention prevents and stabilizes the position detection function of the monitoring system, reduces the cost of expensive sensors, simplifies sensor mounting, simplifies and increases the efficiency of the manufacturing process. Is intended.

The first integrated load sensor for positioning of the present invention is obtained by integrating two load sensors disclosed as an example in Patent Document 1. As a basic configuration of this load sensor, a film-like pressure sensor (for example, a thickness of about 815 μm disclosed in Patent Document 1 (manufactured by Marusan Name Co., Ltd.), which is generally marketed with the same specifications and the same performance. 2) The output signal line is extended in both the left and right directions according to the carpet size, and a miniature connector is added at both ends, as shown in Fig. 2 (a) and (b). The first characteristic is that it is a sensor dedicated to linking connection composed of
Secondly, in addition to the first feature, in order to solve the above-mentioned problem of distance and time differences, as shown in FIG. A second feature is that two sensors dedicated for connection and connection are vertically stacked to form an integrated structure.
Third, the second integrated load sensor for positioning according to the present invention does not simply stack the sensors having the first and second features above and below, but has a commercially available film-like feeling. As a new pressure sensor positioning product, optimized by forming multiple split surface pressure sensors corresponding to the resistor split surface shape of the pressure sensitive surface and the shape of the carpet mounting it. An integrated load sensor for positioning.

  The load sensor having the first feature described above is further provided in order to dispose the sensor at the same distance as possible from the shape of the tile carpet on which the load sensor is mounted (here, the end faces of the substantially square four sides). In order to realize the detection principle that the upper position detection can be detected as a tile carpet at the position where the Xn-direction signal line and Yn-direction signal line connected in a series of straight lines, Created with good symmetry from the viewpoint. Therefore, the sensor dedicated to the coupling connection can achieve easy and efficient mounting of the sensor on the tile carpet. Here, the sensor main body exclusively used for connection is well known because it is a film-like pressure sensor that is commercially available as described above.

The first positioning integrated load sensor having the second feature is a configuration in which the sensors dedicated to the first connection are vertically stacked in a cross shape (FIG. 2C). Here, it is necessary to be careful during manufacture so as not to adhere to the pressure-sensitive surface of the sensor. Therefore, a part of the back sheet for bonding that covers the entire bottom surface of the sensor stacked on the upper side is not necessary. If necessary, the contact substrates of the superimposed weight sensors can be insulated with a resist or the like. In addition, the output signal lines of the weight sensors that are vertically stacked (the output signal lines for connecting and connecting in the X direction and the Y direction) are naturally insulated between the upper and lower load sensors. In the following, the problem solving methods to be considered in the above integration will be examined.
In this case, in solving the problem of distance and time differences in load detection between the two sensors mounted on the top and bottom, the integration effect acts so that these differences are as small as possible. Regardless of the position at which a load is applied, an integrated weight sensor for positioning can be provided with improved reliability in detecting substantially the same load of two sensors. Therefore, the area of the pressure-sensitive surface of the upper sensor and the lower sensor of the two sensors does not necessarily have to be exactly the same area. In addition, if this structure is further devised, the conventional film-like pressure sensor is not necessarily glued up and down as it is, even when a load is applied to any peripheral part of one tile carpet, Considering the square shape of the tile carpet so that the above-mentioned distance and time differences are as small as possible, the pressure-sensitive surface is approximately circular, and the pressure-sensitive surface is installed at the approximate center position of the tile carpet. It was devised so that the sensor could be mounted.
In the example described in Patent Document 1, since two separate film-like pressure-sensitive load sensors are used, two sensor film sheets for connecting and connecting to the Xn and Yn signal lines are used. It was inevitable that the output wires crossed. However, according to the present invention, in the mounting of the output signal line of the weight sensor on the tile carpet, the above-mentioned output wiring can be insulated and separated in the vertical direction, so that the film sheet-like pressure sensor stacked vertically It can now be mounted without crossing the Xn and Yn output signal lines. Thus, the manufacturing process can be simplified and improved in efficiency. Furthermore, the above-mentioned problem of dust and dust in the pressure-sensitive part is characterized in that the problem occurrence probability of the load detection sensor after manufacture can be greatly reduced by integration. Commercially available film pressure sensors have a certain variation in sensor sensitivity. In many cases, a reinforcing plate is provided to reliably transmit the load to the pressure-sensitive portion of the sensor. As an example of a solution to a related problem related to these cases, a spacer that also serves as an insulation may be interposed between two necessary sensors. Also, the reinforcement plate at the bottom of the upper sensor is removed from the two sensors, and the reinforcement plate is composed of one reinforcement plate of the lower sensor of the two sensors. It is also conceivable to insulate the contact substrates so as not to deteriorate the performance of the body. Furthermore, it is possible to use the current technology to directly superimpose the resistors of the upper and lower load sensors by insulating them with spacers or thin films. Although the problem that the height (thickness) of the integrated load sensor is increased to adversely affect the thickness of the tile carpet was examined, there is no problem because the thickness of the sensor is thin. Therefore, considering the extension of this technology to a three-dimensional space, it will be apparent that a three-dimensional integrated sensor for positioning in which three film sheet sensors are linearly stacked in the height direction can be realized. Further, as described above, the area of the pressure-sensitive surface of the upper sensor and the lower sensor of the two sensors is not necessarily the same area. Further, if this structure is further devised, the conventional film-like pressure sensor is not necessarily bonded directly up and down, but the integrated load sensor of the present invention is formed at the approximate center position of each tile carpet. In consideration of mounting in accordance with the load sensor, the load sensor's simultaneous detection performance is maximized when any load is applied to any peripheral part of the tile carpet (here, the end faces of the square sides). It was devised to increase, that is, to reduce the above-mentioned distance and time differences as much as possible.

The second integrated load sensor for positioning having the third feature described above is characterized by optimizing the resistor-dividing surface shape of the pressure-sensitive surface and its arrangement, rather than stacking the sensors up and down. It is a body type load sensor. Here, it is desirable that the area of the pressure-sensitive portion of the film-like pressure sensor be as small as possible by optimization. This is because when this area is larger than necessary, it becomes more difficult to solve the problem of distance and time differences studied in the first case. The conductive circuit corresponding to the divided surface of each resistor can also be formed by a normal technique of an electronic circuit.
Here, the pressure sensor used in the development so far is not only sensitive to the average load per area of the entire pressure-sensitive part, but also a load of about 130 to 150 grams on a part of the pressure-sensitive part surface. When applied, the resistance becomes sufficiently low. Therefore, this shows that the area of the pressure sensitive surface may be smaller. As an example of similarity for solving this problem, there is an example in which the photodiode sensor portion of the optical position sensor is conventionally divided. In other words, it is considered more desirable that the surface-divided pattern of the pressure-sensitive surface resistor of the film-type pressure sensor connected and connected to the Xn system or the Yn system is more desirable to have a two-dimensional symmetry and balance. An example is disclosed (FIG. 3). Here, the pressure-sensitive resistor pattern and the conductive pattern of the load sensor incorporating the pressure-sensitive resistor pattern can be manufactured by a printing technique established on an electronic circuit wiring board. In addition to the formation of through-holes and insulating sheets, which are circuit wiring / forming techniques, resist formation and the like can be employed and utilized as necessary.
In this way, considering the appropriate arrangement position and shape of the divided area of the pressure-sensitive surface resistor of each load sensor connected to the Xn system and Yn system of the tile carpet, the tile carpet can be integrated corresponding to the shape of the carpet. Therefore, it is possible to realize a compact integrated sensor in which the area of the pressure-sensitive portion is optimized two-dimensionally by configuring and mounting with good symmetry and good balance as viewed from the load sensor. In addition, the integrated load sensor for positioning having the second and third features described above is an Xn-Yn system adjacent to each other in position detection when the load is applied across the boundary between two tile carpets. By improving the detection scanning method so as to detect the intersecting intersections of the two sets, position detection at a more reliable boundary can be performed. Specifically, scanning is performed for two sets of Xn system-Yn system adjacent to each other. Thus, for example, in the Xn system, Xn-1 and Xn can be
Since accurate high-speed scanning or the like can be performed, more accurate position detection can be performed regardless of whether or not it is straddling. The same applies to the Yn system.

The square size (laying area) of one tile carpet in this example is the same as the size that is currently commercially available. That is, three types of one side of about 30 centimeters, about 40 centimeters, and about 50 centimeters are assumed.
Here, the load sensor used for the tile carpet of the present invention is a sensor that detects the load as a change in its resistance value, that is, its electrical characteristics change depending on the magnitude of the load when a load is applied. An example is described in (Patent Document 1) Japanese Patent No. 5681933. Moreover, although it is the sensor described also in (nonpatent literature 1), it demonstrates below.
In a state where a normal load is not applied, a high resistance value is exhibited, and the value is at least several megohms or more. On the other hand, when a load is applied, the resistance value of the load sensor rapidly changes to 1 kilohm or less according to the magnitude of the load. By utilizing this characteristic, a pressure detection circuit closely related to the present load sensor characteristic can be easily configured. That is, in general, the gate circuit of the digital circuit can be regarded as being the same (open) as when connected to a high resistance when nothing is connected to the input circuit, and operates as a high level. Further, when a load exceeding a certain level is applied to the load sensor, the load sensor operates at the same low level as when a low resistance is connected to the input circuit of the gate circuit. Therefore, as an example, if the output signal line of the load sensor is directly connected to the input circuit of the CMOS gate circuit, it is possible to directly detect whether a person is on board or not. In this case, since the amount of information can be directly converted to 1 bit, the effect is extremely large. Based on this principle, the load sensor can be incorporated in the tile carpet of the present invention and used as a pressure sensor. According to the experiment, the resistance threshold value of the load sensor corresponding to the threshold value of the input circuit of the gate circuit was about 40 kilohms. Therefore, the sensor output can be directly connected to the gate circuit and digitized as a 1-bit signal without using any circuit that amplifies and processes the output of the pressure sensor in an analog manner. As described above, since human detection can be easily performed, it is described that it is possible to provide an extremely power-saving, inexpensive and safe tile carpet. Here, if the square size (laying area) of the tile carpet is gradually increased, the air bag laying area for load distribution of the tile carpet will also be expanded, so the amount of information is 1 bit. It can be predicted that it will be difficult to directly convert to. Therefore, the combination of the integrated load sensor for positioning according to the present invention and the input circuit threshold adjustment of the gate circuit described above, the structure and completeness of the air bag, and the selection thereof are directly related to the information amount of 1 bit not including the amplifier. It will be clear from the above description that this is a point to consider when converting. According to the basic experiment of the present inventor, it was confirmed that the square size (laying area) of the tile carpet can be up to about 50 cm square by a certain device. It will be apparent that the tolerance of temporal accuracy for detecting the load at the same time can be adjusted within the tolerance necessary and sufficient for practical real-time performance. For example, in the computer program design under the above-mentioned conditions, it has been possible to optimize the high-speed scan detection speed of the low resistance value of the signal line connected to the load sensor (in other words, fine adjustment of the scan speed). Compared with what we have been studying, the system's position detection speed optimization and position detection stability have increased significantly.

As described above, the present invention has the following effects.
The first integrated load sensor for positioning functions as a single load sensor that operates substantially as a single load sensor by integrating two dedicated sensors for connection and connection. Since an integrated load sensor can be developed, there is an effect that problems such as position detection malfunctions and becomes unstable when a load is applied if dust or dust is applied can be greatly improved. In addition, by adopting a dedicated sensor for connection and connection, the difference in distance and time such as accurate sensor mounting and load sensor installation position position difference and load applied timing deviation can be minimized. Therefore, the problem of detecting the load almost simultaneously at the same time can be sufficiently achieved, preventing malfunction of the position detection function of the monitoring system, stabilizing the operation, reducing the price of expensive sensors, facilitating sensor mounting, and manufacturing processes. This has a great effect that simplification and efficiency can be realized.

Since the above-mentioned integrated load sensor output wiring can be insulated up and down so as not to intersect, connect the load sensor connected to the Xn system for connecting and connecting the film sheet-like pressure sensors stacked in the vertical direction and the Yn system The load sensor can be mounted so that the output signal lines of the load sensors do not cross each other. In this way, it is possible to simplify the manufacturing process, simplify handling at the time of laying, and improve efficiency.

In addition to the effects of the invention produced by the first positioning integrated load sensor, the second positioning integrated load sensor is a pressure sensing surface resistor of a positioning integrated load sensor suitable for a monitoring system dedicated to connection. By forming the surface splitting pattern with good symmetry when viewed from the load sensor, stable and simultaneous simultaneous detection of load is possible even when a load is applied to the peripheral edge of the tile carpet or the tile carpet connection. . That is, in the case of the present invention, the load sensor connected to the Xn system and the load sensor connected to the Yn system are paired, and the positions of the four sides of the tile carpet (here, the end faces of the substantially square four sides) are taken into consideration. Since the above-mentioned plane dividing pattern is formed and arranged at four locations (four pairs of one pair) at substantially equal distances from these four sides, so to speak, a plurality of load sensors are integrated. This second integrated load sensor for positioning has a great effect that the operation stability of real-time simultaneous load detection is further enhanced than that of the first integrated load sensor for positioning.

The first and second positioning integrated load sensors described above can sufficiently achieve the problem of detecting a load at the same time. It is possible to detect a position when a load is applied substantially simultaneously at the boundary between adjacent (in other words, adjacent) tile carpets. Specifically, position detection when the load is applied across the boundary between two tile carpets is to detect two intersections that are the intersections of the two adjacent Xn-Yn systems. Therefore, since it can be surely specified at which boundary, there is a special effect that more detailed position detection can be performed.

Laying diagram of tile carpet with load sensor showing one preferred published application of integrated load sensor for positioning according to the present invention FIG. 2A is a plan view of a sensor dedicated to connection, which is a component part of the first integrated load sensor for positioning according to the present invention; FIG. Mounting plan view of the first integrated load sensor for positioning, which is made up of two pieces stacked vertically (c) Resistor sensor pattern plan view for explaining the resistor dividing surface shape of the pressure-sensitive surface of the second positioning integrated load sensor of the present invention (a) Other resistor sensor pattern plan view (b) Positioning of the present invention Plan view of resistor-divided surface shape of pressure-sensitive surface of integrated load sensor (c) Mounting plan view of the second integrated load sensor for positioning, in which the pressure-sensitive surface of the present invention has a split surface shape

Hereinafter, an embodiment of an integrated load sensor for positioning according to the present invention will be described based on the plan view of FIG. 1 disclosed in (Non-Patent Document 1). Subsequent to this, description will be made in order up to FIG.

FIG. 1 is a laying diagram of a tile carpet with a load sensor. This figure shows the position of the connected tile carpets in XY two-dimensional coordinates. Where X1, X2, X3
..Xn represents a series of connection signal lines in which load sensors connected in parallel to one of the Y-axes of two load sensors mounted substantially in the middle of each tile carpet are connected in parallel. Similarly, Y1, Y2, Y3,... Yn are a series of connected load sensors connected in parallel to the other X-axis of the two load sensors mounted in the middle of each tile carpet. A connection signal line is shown. In other words, a description will be given with reference to a representative one. Reference numeral 101 denotes a signal line Yn connected and connected in parallel to the X axis, and reference numeral 102 denotes a signal line Xn connected and connected in parallel to the Y axis. Reference numerals 103 and 104 denote load sensors that are independently connected to the two signal lines Xn and Yn, respectively. In FIG. 1, for example, if it is detected that the X6 and Y16 signal lines exhibit a resistance value lower than the input resistance threshold value of the digital circuit, the position at which the X6 and Y16 signal lines in FIG. Can be identified as a place where the load is detected (for example, the position of the person being watched over).

FIG. 2 (a) shows a plan view of a sensor dedicated to connection. 201 is a miniature connector plug, 202 is a miniature connector receptacle, 210 is a load sensor, 213 and 214 are signal lines for output of a weight sensor for connection to one of the Xn system and Yn system of the load sensor 210, 215 Reference numeral 216 denotes an output signal line of the weight sensor for connection to the other system of the load sensor 210 of the Xn system-Yn system. The above-mentioned 217 and 218 and 219 and 220 correspond to 213 and 214 and 215 and 216, respectively, extending to the periphery of the tile carpet on which these output signal lines are mounted.

FIG. 2B shows a schematic cross-sectional view of the basic structure of the sensor dedicated for connection. Here, 201, 202 and 210 are the plug and receptacle of the above-mentioned miniature connector and a load sensor, respectively. 203 is a hard plate, 204 is a spacer, 205 is a contact sheet, 206 is a resistor, 207 is a conductive circuit, 208 is a back sheet, and 213... 216 are output signal lines. 217 ... 220 are extended output signal lines.
FIG. 2 (c) is a mounting plan view of an integrated load sensor for positioning. 200 is a tile carpet, 221 and 222 are dedicated to other connection connections in which the same connectors as 201 and 202 described above are mounted. This is a miniature connector additionally mounted with a sensor rotated 90 degrees to integrally connect the sensor to either the upper side or the lower side. That is, a miniature connector plug and a miniature connector receptacle of a sensor dedicated to each additional connection. Since the other description is the same as the description of FIG. 2A and FIG. 2B, the description will be unnecessary here.

FIGS. 3A and 3B are plan views of resistor sensor patterns for explaining the resistor dividing surface shape of the pressure-sensitive surface. Here, FIG. 3A and FIG. 3B are illustrated in FIG. 3A. FIG. 3A shows the resistor printing pattern of the weight sensor for connection to one of the Xn-Yn systems and the arrangement thereof. Indicates. Reference numerals 301, 302, 303, and 304 denote resistor patterns and their arrangement, and reference numerals 305, 306, 307, and 308 denote a part of wiring patterns connected to the conductive circuit. Reference numeral 309 denotes a wiring pattern configuration area of the conductive circuit below the resistor by a broken line. Similarly, reference numerals 311, 312, 313, and 314 in FIG. 3B indicate resistor printing patterns and arrangements of weight sensors for connection to the other system of the Xn system and the Yn system. As can be seen from the above description, the four output wirings in FIG. 3B also have a part of the wiring pattern connected to the conductive circuit similar to 305, 306, 307, 308 in FIG. Description is omitted. The wirings of the conductive circuit in the lower part are all connected for each identical system in a state where the Xn system-Yn system corresponding to FIGS. 3A and 3B are insulated independently. For example, FIG. 3A is connected to the Xn system and FIG. 3B is connected to the Yn system. Similar to the load sensor 210 in FIG. 2C, 300 is a printed sheet indicating that the pressure-sensitive surface has a substantially circular shape. Reference numerals 301, 302, 303, and 304 denote resistor patterns and their arrangement, and reference numerals 305, 306, 307, and 308 denote a part of wiring patterns connected to the conductive circuit. Reference numeral 309 denotes a wiring pattern configuration area of the conductive circuit below the resistor by a broken line.

Since FIG. 3B is a pattern in which the resistor pattern and the arrangement of FIG.

FIG. 3 (c) is obtained by integrally forming FIGS. 3 (a) and 3 (b) on the same two-dimensional plane. Here, as described above, naturally, the portions corresponding to FIGS. 3A and 3B (the connection signal lines to the Xn system and the Yn system) are insulated from each other. Also, it is important how many resistor patterns are divided. Here, it is divided into eight parts, and the difference due to the load detection position is made as small as possible.

FIG. 4 shows a mounting plan view of an integrated load sensor for positioning in which the pressure-sensitive surface has a divided surface shape. In FIG. 4, the load sensor 410 is the same as the load sensor 210 in FIG.

101 Signal line 102 connected in parallel to the X axis 102 Signal line connected in parallel to the Y axis 103 Load sensor 104 Load sensor 200 Tile carpet 201 Miniature connector plug 202 Miniature connector receptacle 203 Hard plate 204 Spacer 205 Contact sheet 206 Resistor 207 Conductive circuit 208 Back sheet 210 Load sensor 213-220 Output signal line 221 Miniature connector plug 222 Miniature connector receptacle 223-230 Output signal line 300 Resistor print sheet 301-304 Resistor pattern 305-308 Conductor circuit A part of the wiring pattern 309 to be connected to the wiring pattern component 400 Tile carpet 401 Miniature connector plug 402 Miniature connector receptacle 41 Load sensors 411 to 414 output signal line 421 Miniature connector plug 422 Miniature connector receptacle

The first positioning integrated load sensor having the second feature is a configuration in which the sensors dedicated to the first connection are vertically stacked in a cross shape (FIG. 2C). Here, it is necessary to be careful during manufacture so as not to adhere to the pressure-sensitive surface of the sensor. Therefore, a part of the back sheet for bonding that covers the entire bottom surface of the sensor stacked on the upper side is not necessary. If necessary, the contact substrates of the stacked load sensors can be insulated with a resist or the like. Further, the output signal lines of the load sensors stacked in the vertical direction (output signal lines for connecting and connecting in the X direction and the Y direction) are naturally insulated between the vertical load sensors. In the following, the problem solving methods to be considered in the above integration will be examined.
In this case, in solving the problem of distance and time differences in load detection between the two sensors mounted on the top and bottom, the integration effect acts so that these differences are as small as possible. Regardless of the position at which a load is applied, an integrated weight sensor for positioning can be provided with improved reliability in detecting substantially the same load of two sensors. Therefore, the area of the pressure-sensitive surface of the upper sensor and the lower sensor of the two sensors does not necessarily have to be exactly the same area. In addition, if this structure is further struck and devised, the conventional film-like pressure sensor is not necessarily bonded as it is up and down, even when a load is applied to any peripheral part of one tile carpet, Considering the square shape of the tile carpet so that the above-mentioned distance and time differences are as small as possible, the pressure-sensitive surface is approximately circular, and the pressure-sensitive surface is installed at the approximate center position of the tile carpet. It was devised so that the sensor could be mounted.
In the example described in Patent Document 1, since two separate film-like pressure-sensitive load sensors are used, two sensor film sheets for connecting and connecting to the Xn and Yn signal lines are used. It was inevitable that the output wires crossed. However, according to the present invention, in the mounting of the output signal line of the weight sensor on the tile carpet, the above-mentioned output wiring can be insulated and separated in the vertical direction, so that the film sheet-like pressure sensor stacked vertically It can now be mounted without crossing the Xn and Yn output signal lines. Thus, the manufacturing process can be simplified and improved in efficiency. Furthermore, the above-mentioned problem of dust and dust in the pressure-sensitive part is characterized in that the problem occurrence probability of the load detection sensor after manufacture can be greatly reduced by integration. Commercially available film pressure sensors have a certain variation in sensor sensitivity. In many cases, a reinforcing plate is provided to reliably transmit the load to the pressure-sensitive portion of the sensor. As an example of a solution to a related problem related to these cases, a spacer that also serves as an insulation may be interposed between two necessary sensors. Also, the reinforcement plate at the bottom of the upper sensor is removed from the two sensors, and the reinforcement plate is composed of one reinforcement plate of the lower sensor of the two sensors. It is also conceivable to insulate the contact substrates so as not to deteriorate the performance of the body. Furthermore, it is possible to use the current technology to directly superimpose the resistors of the upper and lower load sensors by insulating them with spacers or thin films. Although the problem that the height (thickness) of the integrated load sensor is increased to adversely affect the thickness of the tile carpet was examined, there is no problem because the thickness of the sensor is thin. Therefore, considering the extension of this technology to a three-dimensional space, it will be apparent that a three-dimensional integrated sensor for positioning in which three film sheet sensors are linearly stacked in the height direction can be realized. Further, as described above, the area of the pressure-sensitive surface of the upper sensor and the lower sensor of the two sensors is not necessarily the same area. Further, if this structure is further devised, the conventional film-like pressure sensor is not necessarily bonded directly up and down, but the integrated load sensor of the present invention is formed at the approximate center position of each tile carpet. In consideration of mounting in accordance with the load sensor, the load sensor's simultaneous detection performance is maximized when any load is applied to any peripheral part of the tile carpet (here, the end faces of the square sides). It was devised to increase, that is, to reduce the above-mentioned distance and time differences as much as possible.

FIG. 2 (a) shows a plan view of a sensor dedicated to connection. 201 is a miniature connector plug, 202 is a miniature connector receptacle, 210 is a load sensor, 213 and 214 are signal lines for output of the load sensor to be connected to one of the Xn-Yn systems of the load sensor 210, 215 Reference numeral 216 denotes an output signal line of the load sensor for connecting to the other system of the load sensor 210 of the Xn system-Yn system. The above-mentioned 217 and 218 and 219 and 220 correspond to 213 and 214 and 215 and 216, respectively, extending to the periphery of the tile carpet on which these output signal lines are mounted.

FIGS. 3A and 3B are plan views of resistor sensor patterns for explaining the resistor dividing surface shape of the pressure-sensitive surface. Here, in FIGS. 3A and 3B, the diagrams of FIGS. 3A and 3B are shown in FIGS. 3A and 3B. FIG. 3A shows the resistor printing pattern of the load sensor and its arrangement for connection to one of the Xn-Yn systems. Indicates. Reference numerals 301, 302, 303, and 304 denote resistor patterns and their arrangement, and reference numerals 305, 306, 307, and 308 denote a part of wiring patterns connected to the conductive circuit. Reference numeral 309 denotes a wiring pattern configuration area of the conductive circuit below the resistor by a broken line. Similarly, reference numerals 311, 312, 313, and 314 in FIG. 3B denote resistor print patterns of the load sensor for connection to the other system of the Xn system-Yn system and the arrangement thereof. As can be seen from the above description, the four output wirings in FIG. 3B also have a part of the wiring pattern connected to the conductive circuit similar to 305, 306, 307, 308 in FIG. Description is omitted. The wirings of the conductive circuit in the lower part are all connected for each identical system in a state where the Xn system-Yn system corresponding to FIGS. 3A and 3B are insulated independently. For example, FIG. 3A is connected to the Xn system and FIG. 3B is connected to the Yn system. Similar to the load sensor 210 in FIG. 2C, 300 is a printed sheet indicating that the pressure-sensitive surface has a substantially circular shape. Reference numerals 301, 302, 303, and 304 denote resistor patterns and their arrangement, and reference numerals 305, 306, 307, and 308 denote a part of wiring patterns connected to the conductive circuit. Reference numeral 309 denotes a wiring pattern configuration area of the conductive circuit below the resistor by a broken line.

Claims (3)

  It is equipped with a resistance change type load sensor, the output signal line of the load sensor is extended in both left and right directions according to the carpet size, and a miniature connector is additionally connected to both ends of the output signal line. An integrated load sensor for positioning, in which a plurality of sensors are stacked vertically to form an integrated structure. The integrated load sensor for positioning according to claim 1, wherein the plurality of sensors dedicated to connection and connection have substantially the same performance.   Dividing the resistor on the pressure-sensitive surface of the load sensor into multiple parts, and integrating the shape and arrangement of the resistor-dividing surface and the number of divisions into multiple pressure-sensitive sensors formed on the same pressure-sensitive plane Integrated load sensor for positioning, characterized in that

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