TWI695304B - Pressure sensing system and setting method thereof - Google Patents

Abstract

A pressure sensing system and setting method thereof are provided. The system includes a first pressure sensing plate, a second pressure sensing plate, and a processing device. A first flexible substrate of the first pressure sensing plate has a first conductive pattern. A second flexible substrate of the second pressure sensing plate has a second conductive pattern. The second conductive pattern is laminated with the first conductive pattern. The processing device supplies power to the first pressure sensing plate, and acquires a pressure sensing signal through the second pressure sensing plate. The processing device compares the signal with a threshold value to determine whether the first pressure sensing plate and the second pressure sensing plate are pressed by external force. An error signal is avoided through a comparison between the pressure sensing signal and the threshold value, and the sensing accuracy is improved.

Description

Pressure sensing system and pressure sensing setting method

The invention relates to a pressure sensing related field, in particular to a soft electronic pressure sensing system and a pressure sensing setting method.

Press, the soft electronic pressure device is set on a flexible or flexible substrate with a pressure sensing structure, and the pressure measurement is performed by the pressure sensing structure. Among them, the soft electronic pressure device is suitable for a large area and bending measurement environment. For example: ultra-thin sensitivity-adjustable keyboard for tablet PC, active pressure pen element, wearable pressure sensing component or medical detection pressure sensing component, etc.

However, when the soft electronic pressure device is bent, it is easy to output unstable electrical signals, which is easy to cause measurement errors. To improve the foregoing problems, such as US Patent No. US7980144B2, a soft electronic pressure sensing device and its manufacturing method are disclosed , Which includes a multi-layer flexible film, a plurality of electrodes, a plurality of sensing blocks and a plurality of bumps, each flexible film is arranged at intervals to define two spaces, each electrode and each sensing block are arranged on the flexible film and located in one of the spaces And the bumps are arranged on the flexible film and located in another space, the air in the two spaces can maintain the relative distance between the two flexible films of each electrode and each sensing block; when the soft electronic pressure When the sensing device is deformed, it is possible to avoid erroneous sensing signals due to the contact between the sensing blocks and the electrodes or the two sensing blocks respectively arranged on different flexible films.

However, the aforementioned patent requires a complicated structural design to spend a lot of manufacturing processes and costs in order to prevent the flexible films from contacting each other and generating an error signal when they are not under pressure.

Furthermore, if the aforementioned patented soft electronic pressure sensing device is applied to a wearable pressure sensing component or a medical detection pressure sensing component, the sensing block and the convex block protruding on the flexible film can easily bring the user to wear Or foreign body sensation during medical testing, causing discomfort to users.

In order to solve the above-mentioned problems, the present invention provides a pressure sensing system and a pressure sensing setting method. By setting and judging the critical value, it is not necessary to use an additional complicated structure to avoid the problem of contact between the two electrodes, thereby effectively simplifying the process and improving reliability , Increase its application range and measurement comfort.

An embodiment of the present invention provides a pressure sensing system, including: a first pressure sensing piece having a first flexible substrate and a first conductive totem, the first conductive totem is disposed on the first flexible substrate On the surface; a second pressure-sensing sheet with a second flexible substrate and a second conductive totem, the second conductive totem is provided on the surface of the second flexible substrate, wherein the second pressure-sensing sheet A surface provided with a second conductive totem is superimposed on a surface provided with a first conductive totem; and a processing device, which is electrically connected to the first pressure-sensing chip and the second pressure-sensing chip, The processing device outputs a power to the first pressure-sensing chip, and obtains a pressure-sensing signal from the second pressure-sensing chip, and compares the pressure-sensing signal with a threshold value to determine the first pressure-sensing chip and the first 2. Whether the pressure sensor is pressed by external force.

Based on the above, the present invention superimposes the first pressure-sensing sheet and the second pressure-sensing sheet to further obtain the pressure-sensing signal, and judges the pressure-sensing signal and the critical value to produce an effective measurement result ; With this, simple structure and threshold setting can effectively avoid the generation of measurement error signal, and improve the conventional knowledge that the shortcoming of measurement error can be avoided through complex structure.

In one embodiment, the first conductive totem has a first high-conductivity circuit and a first low-conductivity circuit electrically connected to the first high-conductivity circuit. The first low-conductivity circuit extends from the first high-conductivity circuit and A first pressure sensing area is formed on a flexible substrate, the area of the first pressure sensing area is larger than the area occupied by the first highly conductive circuit on the first flexible substrate; the second conductive totem has a second highly conductive circuit And a second low conductivity circuit electrically connected to one of the second high conductivity circuits, the second low conductivity circuit extending from the second high conductivity circuit and forming a second pressure sensing area on the second flexible substrate, the second pressure sensing The area of the area is larger than the area occupied by the second high-conductivity circuit on the second flexible substrate; thereby, the power is transmitted to the first low-conductivity circuit through the first high-conductivity circuit, between the first low-conductivity circuit and the second low-conductivity circuit When the lines are in contact with each other, a pressure sensing signal is generated, and the pressure sensing signal is returned to the processing device through the second high-conductivity circuit, thereby improving the sensitivity and accuracy of the measurement through the design of the high-low conductivity circuit.

In one of the embodiments, the first pressure-sensing sheet further has a first insulating layer, the first insulating layer covering a side of the first highly conductive circuit away from the first flexible substrate; the second pressure-sensing sheet It further has a second insulating layer covering the side of the second high-conductivity circuit away from the second flexible substrate; thereby, through the arrangement of the first insulating layer and the second insulating layer, the first high-conductivity is avoided The circuit and the second high-conductivity circuit have a problem of excessive current consumption due to mutual contact.

In one embodiment, the number of the first conductive totems is plural, each first conductive totem has a first transmission part, each first transmission part is electrically connected to the processing device independently, and each first transmission part Both ends are connected to the processing device and each first conductive totem respectively; the number of the second conductive totem is plural, each second conductive totem has a second transmission part, and each second transmission part is independent of the processing device Connection, the two ends of each second transmission part are respectively connected to the processing device and each second conductive totem; thereby, the number of conductive totems can be increased according to the requirements of the measurement area, and when each conductive totem is pressed, The pressure sensing signal is transmitted back to the processing device by the transmission part, respectively, so as to determine the pressure part and area, so as to achieve the effect of detecting pressure changes in different ranges.

An embodiment of the present invention provides a pressure sensing setting method, which is performed using a pressure sensing system. The steps of the pressure sensing setting method include: the processing device receives the first pressure sensing piece and the second pressure sensing piece without being subjected to external force When resisting, an initial signal is generated by the second pressure-sensing sheet; when the processing device receives the first pressure-sensing sheet and the second pressure-sensing sheet under external pressure, the second pressure-sensing sheet generates a signal The compressed signal; and the processing device processes the initial signal and the compressed signal to generate a critical value.

Through the above, the present invention processes the initial signal that is not pressed by the external force and the compressed signal that has been pressed by the external force to generate a threshold value that is the best judgment reference; Threshold value to improve the accuracy of measurement.

In order to facilitate the description of the central idea of the present invention in the column of the above summary of the invention, it is expressed in a specific embodiment. In the embodiments, various objects are drawn according to the proportion, size, deformation or displacement suitable for description, rather than drawn according to the proportion of actual components and their relative positions, which will be described first.

Please refer to FIG. 1 to FIG. 7, the first embodiment of the present invention provides a pressure sensing system 100, which includes:

A first pressure-sensing sheet 10 has a first flexible substrate 11 and a first conductive totem 12, the first conductive totem 12 is disposed on the surface 111 of the first flexible substrate 11, in the embodiment of the present invention The first conductive totem 12 is formed on the surface 111 of the first flexible substrate 11 in the form of a printed circuit; thereby, the first pressure-sensing sheet 10 is in the shape of a flat sheet.

The first conductive totem 12 has a first high-conductivity circuit 121, a first low-conductivity circuit 122, a first insulating layer 123 and a first transmission portion 124. The first high-conductivity circuit 121 and the first low-conductivity circuit 122 are The first transmission portion 124 is electrically connected, and the first insulating layer 123 covers the side of the first high-conductivity circuit 121 away from the first flexible substrate 11, wherein the first low-conductivity circuit 122 extends from the first high-conductivity circuit 121 and is A first pressure sensing area 13 is formed on the first flexible substrate 11. The area of the first pressure sensing area 13 is larger than the area occupied by the first highly conductive circuit 121 in the first flexible substrate 11. In the embodiment of the present invention In the middle, the first high-conductivity circuit 121 is made of silver, and the first low-conductivity circuit 122 is made of conductive carbon; the first conductive totem 12 is generally rectangular, and the first high-conductivity circuit 121 is provided on at least one side of the peripheral edge of the rectangle and branches The cross is arranged in a rectangular shape, and the first low-conductivity circuit 122 is extended from the first high-conductivity circuit 121 to form a mesh structure.

Furthermore, the first insulating layer 123 can directly cover the first highly conductive circuit 121 or indirectly cover the first highly conductive circuit 121; please refer to FIGS. 2 to 4 for the first type of the first conductive totem 12, the first An insulating layer 123 directly covers the first highly conductive circuit 121; please refer to FIGS. 5 to 7 for the second type of the first conductive totem 12, the first insulating layer 123 indirectly covers the first highly conductive circuit 121, The first low-conductivity circuit 122 is divided into a first covering region 122a and a first layout region 122b. The first covering region 122a is disposed on the side of the first high-conductivity circuit 121 away from the first flexible substrate 11 and the first An insulating layer 123 covers the first covering area 122a, and the first layout area 122b is provided on the surface 111 of the first flexible substrate 11.

A second pressure sensing piece 20 having a second flexible substrate 21 and a second conductive totem 22, the second conductive totem 22 is disposed on the surface 211 of the second flexible substrate 21, in the embodiment of the present invention The second conductive totem 22 is formed on the surface 211 of the second flexible substrate 21 in the form of a printed circuit; thereby, the second pressure-sensing sheet 20 is in the shape of a flat sheet.

The second conductive totem 22 has a second high conductive circuit 221, a second low conductive circuit 222, a second insulating layer 223 and a second transmission portion 224, the second high conductive circuit 221 and the second low conductive circuit 222 are The second transmission portion 224 is electrically connected, and the second insulating layer 223 covers the side of the second high-conductivity circuit 221 away from the second flexible substrate 21, wherein the second low-conductivity circuit 222 extends from the second high-conductivity circuit 221 and A second pressure sensing area 23 is formed on the second flexible substrate 21, the area of the second pressure sensing area 23 is larger than the area occupied by the second highly conductive circuit 221 in the second flexible substrate 21, in the embodiment of the present invention In the middle, the second high-conductivity circuit 221 is made of silver, and the second low-conductivity circuit 222 is made of conductive carbon; the second conductive totem 22 is generally rectangular, and the second high-conductivity circuit 221 is provided on at least one side of the peripheral edge of the rectangle and branches The cross is arranged in a rectangular shape, and the second low-conductivity circuit 222 is extended and staggered from the second high-conductivity circuit 221 to form a mesh structure.

Furthermore, the second insulating layer 223 can directly cover the second highly conductive circuit 221 or indirectly cover the second highly conductive circuit 221; when the second insulating layer 223 indirectly covers the second highly conductive circuit 221, the second low conductivity The circuit 222 is divided into a second covering region 222a and a second layout region 222b. The second covering region 222a is disposed on a side of the second highly conductive circuit 221 away from the second flexible substrate 21, and the second insulating layer 223 is covered by The second covering area 222a and the second layout area 222b are disposed on the surface 211 of the second flexible substrate 21.

In addition, in the embodiment of the present invention, the first pressure sensing sheet 10 and the second pressure sensing sheet 20 have the same structure, that is, the arrangement type of the first conductive totem 12 and the arrangement type of the second conductive totem 22 The state is the same. Depending on the actual use, different structures can also be used. In addition, in this embodiment, the first flexible substrate 11 and the second flexible substrate 21 are made of transparent plastic materials. However, different flexible materials can actually be used according to requirements.

A processing device 30, which is electrically connected to the first pressure-sensing sheet 10 and the second pressure-sensing sheet 20, wherein the second pressure-sensing sheet 20 is superimposed on the first surface 211 with a second conductive totem 22 The pressure sensing sheet 10 is provided with a surface 111 of the first conductive totem 12; when the processing device 30 outputs a power, the power is input from the first transmission portion 124 of the first pressure sensing sheet 10 to the first highly conductive circuit 121, A high-conductivity circuit 121 transmits power to the first pressure-sensing region 13 of the first low-conductivity circuit 122; then, the second pressure-sensing region 23 of the second pressure-sensing chip 20 and the first pressure-sensing chip 10 When the first pressure-sensing area 13 is in contact, the first pressure-sensing area 13 of the first low-conductivity circuit 122 and the second pressure-sensing area 23 of the second low-conductivity circuit 222 will generate a pressure sensing signal. The second high-conductivity circuit 221 returns the pressure-sensing signal from the second transmission part 224 to the processing device 30, and the processing device 30 compares the pressure-sensing signal with a threshold value to determine the first pressure-sensing sheet 10 and the second Whether the pressure sensing piece 20 is pressed by an external force and its magnitude.

Furthermore, in the embodiment of the present invention, the pressure sensing signal is a current value; when the pressure sensing signal is greater than the critical value, the processing device 30 determines that the first pressure sensing sheet 10 and the second pressure sensing sheet 20 are resisted by external force Pressure.

To further explain, the present invention provides a pressure sensing setting method, which is performed using the pressure sensing system 100. The steps of the pressure sensing setting method include:

The first signal receiving step: the first pressure sensing sheet 10 and the second pressure sensing sheet 20 are superimposed on each other, and the first pressure sensing sheet 10 and the second pressure sensing sheet 20 are received by the processing device 30 without being resisted by external force When pressing, the first pressure-sensing area 13 of the first pressure-sensing sheet 10 contacts the second pressure-sensing area 23 of the second pressure-sensing sheet 20, and an initial signal generated by the second pressure-sensing sheet 20, As shown in Figure 3 and Figure 6.

Second signal receiving step: the processing device 30 receives the first pressure sensing area 13 of the first pressure sensing sheet 10 and the second pressure sensing area 23 of the second pressure sensing sheet 20 are pressed by the external force, and the second pressure The sensor 20 generates a pressure signal, as shown in FIGS. 4 and 7.

Signal processing step: The processing device 30 processes the initial signal and the compressed signal to generate a critical value, wherein the processing device 30 divides the sum of the initial signal and the compressed signal by a reference value to obtain the critical value, in the present invention In an embodiment, the reference value is 4, and the critical value is between the initial signal and the compressed signal and is more biased toward the end of the initial signal.

Therefore, when the pressure sensing system 100 of the present invention is used for different purposes, the initial signals of the first pressure sensing sheet 10 and the second pressure sensing sheet 20 that are not pressed by external force are obtained first. Both the flexible substrate 11 and the second flexible substrate 21 are made of flexible materials, so there may be a little deflection when placed horizontally, so that there is a gap between the first conductive totem 12 and the second conductive totem 22 The naturally occurring gaps will not completely contact each other to turn on the electrical signal, and the part that has contact with the conducting signal should be judged as noise at this time, so the setting of the threshold value is required to eliminate the interference problem of noise; By applying pressure from the corresponding application, these gaps will disappear after being pressed, so that the first conductive totem 12 and the second conductive totem 22 are in close contact with each other, thereby obtaining the first pressure sensing sheet 10 and the second pressure sensing The compressed signal of the sheet 20 is pressed by the external force, and the processing device 30 processes the initial signal that is not pressed by the external force and the compressed signal that has been pressed by the external force to generate an exclusive threshold value, and sets the exclusive threshold value It is the best judgment standard; then, the corresponding threshold value is used for subsequent corresponding use to generate accurate measurement results. In particular, if this system is used on a mattress, it can be set to a lower threshold in the case of users with a small size by setting the exclusive threshold value in response to the user status of different body types. The sensitivity can be improved to avoid the problem of missed detection; and in the case of larger users, the higher threshold value can avoid the problem of noise interference affecting the actual measurement accuracy. The size of the pressure signal can be used to determine the pressure of the external force.

Example: When the pressure sensing system 100 of the present invention is used for medical detection of whether the patient is lying down in the same posture for a long time, the first pressure sensing sheet 10 and the second pressure sensing sheet 20 can be placed on the mattress and the patient is not lying on Before the mattress, first obtain the initial signal; when the patient is lying on the mattress, then obtain the compressed signal; then, through the processing device 30, the patient-specific threshold value is processed.

Please refer to FIG. 8, which is a second embodiment of the present invention. The difference from the previous embodiment is that the pressure sensing system 100 further includes:

The first pressure-sensing sheet 10 is provided with a plurality of first conductive totems 12, each of the first conductive totems 12 has a first transmission part 124, and each first transmission part 124 is electrically connected to the processing device 30 independently, each Both ends of the first transmission portion 124 are connected to the processing device 30 and each first conductive totem 12 respectively. In the embodiment of the present invention, each first conductive totem 12 is spaced along the longitudinal and lateral directions of the first pressure-sensing sheet 10 Array arrangement.

The second pressure sensing piece 20 is provided with a plurality of second conductive totems 22, each of the second conductive totems 22 has a second transmission part 224, each second transmission part 224 is electrically connected to the processing device 30 independently, each The two ends of the second transmission part 224 are connected to the processing device 30 and each second conductive totem 22 respectively. In the embodiment of the present invention, each second conductive totem 22 is spaced along the longitudinal and lateral directions of the second pressure-sensing sheet 20 Array arrangement; in this embodiment, the structure of the second pressure-sensing sheet 20 is the same as the structure of the first pressure-sensing sheet 10, therefore, only the relevant reference numerals of the first pressure-sensing sheet 10 are marked in FIG. 8.

Therefore, the first pressure-sensing sheet 10 and the second pressure-sensing sheet 20 can increase the number of the first conductive totem 12 and the second conductive totem 22 according to the requirements of the measurement area, and through each of the first conductive totem 12 and the second When the conductive totem 22 is under pressure, the pressure sensing signal is returned to the processing device 30 through each second transmission part 224, so as to judge different pressure parts and areas to achieve the effect of detecting pressure changes in different ranges.

Example: When the pressure sensing system 100 of the present invention is used for medical detection of whether the patient is lying down in the same posture for a long time, the first pressure sensing sheet 10 and the second pressure sensing sheet 20 can be placed on the mattress while the patient is lying on the bed After the pad, the pressure sensing signal returned by each second transmission part 224 can be known, and the pressure sensing signal returned by the first conductive totem 12 and the second conductive totem 22 close to the upper body under pressure is greater than that of other parts. The conductive totem 12 and the second conductive totem 22 are pressure-sensing signals returned by compression, so it can be known that the main weight of the patient is concentrated on the upper body, so as to achieve the effect of judging the different compressed parts and areas.

Please refer to FIG. 9 to FIG. 11, which is the third embodiment of the present invention. The difference from the foregoing embodiment is:

The first pressure-sensing sheet 10 has a plurality of first conductive totems 12, each of the first conductive totems 12 is arranged in a two-dimensional array, and the first transmission parts 124 of each of the first conductive totems 12 are connected to each other along a first direction; In the embodiment, according to the drawing direction of FIG. 9, from top to bottom, each first conductive totem 12 is connected into the first row, the second row, and the third row, respectively, and the processing device 30 will sequentially send signals to each row The first conductive totem 12, and the first conductive totem 12 of each row is electrically conductive due to the electrical connection of the first transmission portion 124.

The second pressure sensing piece 20 has a plurality of second conductive totems 22, each second conductive totem 22 is arranged in a two-dimensional array, and the second transmission portions 224 of each second conductive totem 22 are connected to each other along the second direction, the first direction The second direction intersects each other. In the embodiment of the present invention, the second conductive totems 22 are connected into the first row, the second row, and the third row from left to right in the drawing direction of FIG. 9. In this embodiment, the second conductive totems 22 of each row are electrically connected to the processing device 30 through the second transmission part 224 to return the electrical signal to the processing device 30.

The first pressure-sensing sheet 10 and the second pressure-sensing sheet 20 are overlapped with each other, and when the first pressure-sensing sheet 10 and the second pressure-sensing sheet 20 are pressed and come into contact with each other, the compressed first conductive The totem 12 and the second conductive totem 22 are electrically connected to flow the signal sent by the processing device 30 through the first conductive totem 12 and the second conductive totem 22, and then return to the processing device 30 to determine the pressed position.

For example: please refer to FIG. 9 and FIG. 11, when the first pressure sensor 10 and the second pressure sensor 20 are pressed by the external force S, the first force in the center of the second row is pressed by the external force S The conductive totem 12 is electrically connected to the second conductive totem 22 in the center of the second row, and the processing device 30 can receive the second conductive totem 22 only when the signal sent by the first conductive totem 12 is pressed by the external force S mentioned above The feedback transmitted to the processing device 30, the other first conductive totem 12 and the second conductive totem 22 which are not pressed by the external force S receive the initial signal. Therefore, according to the reactive first conductive totem 12 and the second conductive totem 22, the pressure position is known, and the area pressed by the external force S is the single first conductive totem 12 and the second conductive totem 22 that are compressed. Partial area, and so on. If multiple conductive totems are pressed by the external force at the same time, the processing device 30 can also make a judgment on the compression of multiple positions through the feedback source and signal strength received at the same time.

Through the above, the effects that the present invention can achieve are as follows:

1. The pressure sensing system 100 of the present invention uses a simple structure with the threshold setting and judgment of the processing device 30, which can effectively avoid the generation of measurement error signals, and improve the conventional knowledge. The disadvantages of measurement errors can be avoided through complex structures In order to effectively reduce the manufacturing process and cost of the first pressure sensing sheet 10 and the second pressure sensing sheet 20 of the present invention.

2. The present invention transmits power to the first low-conductivity circuit 122 through the first high-conductivity circuit 121, and senses the second pressure in the first pressure-sensing area 13 of the first low-conductivity circuit 122 and the second low-conductivity circuit 222. When the areas 23 are in contact with each other, a pressure sensing signal is generated, and the pressure sensing signal is returned to the processing device 30 through the second high-conductivity circuit 221 for subsequent processing and judgment, thereby enhancing the measurement sensitivity through the design of the high-low conductivity circuit And accuracy.

3. In the present invention, by providing the first insulating layer 123 and the second insulating layer 223, the problem of excessive current consumption due to the contact between the first highly conductive circuit 121 and the second highly conductive circuit 221 is avoided, and on the one hand, power consumption is avoided Seriously, on the other hand, it also avoids that the pressure sensing signal is directly transmitted by the first highly conductive circuit 121 and the second highly conductive circuit 221 and the measurement is not accurate.

4. The first conductive totem 12 and the second conductive totem 22 of the present invention are formed on the first pressure-sensing sheet 10 and the second pressure-sensing sheet 20 in a printed circuit manner to make the first pressure-sensing sheet 10 and the second pressure The sensing piece 20 is in a flat sheet shape. When the first pressure sensing piece 10 and the second pressure sensing piece 20 are applied to the pressure detection of wear or medical detection, the user can feel no foreign body and provide comfortable use. Sex.

5. In the present invention, by processing the initial signal that is not compressed by the external force and the compressed signal that has been compressed by the external force, a threshold value that is the best judgment reference is generated; thereby, it can provide different applications to set a specific threshold value To improve the accuracy of measurement.

6. The present invention can increase the number of conductive totems on the pressure-sensing sheet according to the requirements of the measurement area, and when each conductive totem is under pressure, the transmission section separately transmits the pressure-sensing signal to the processing device 30 to determine the received Pressure part and area to achieve the effect of detecting pressure changes in different ranges.

The above-mentioned embodiments are only used to illustrate the present invention, not to limit the scope of the present invention. Any modifications or changes that do not violate the spirit of the present invention are within the scope of the invention to be protected.

100: pressure sensing system

10: The first pressure sensor

11: The first flexible substrate

111: surface

12: The first conductive totem

121: The first highly conductive circuit

122: the first low conductivity line

122a: first coverage area

122b: the first layout area

123: First insulation layer

124: First Transmission Department

13: The first pressure sensing area

20: Second pressure sensor

21: Second flexible substrate

211: Surface

22: Second conductive totem

221: Second highest conductive line

222: The second lowest conductive line

222a: Second coverage area

222b: Second layout area

223: Second insulating layer

224: Second Transmission Department

23: Second pressure sensing area

30: Processing device

S: external force

FIG. 1 is a system schematic diagram of the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a first type of pressure-sensing sheet according to the first embodiment of the present invention, showing that the first highly conductive circuit is directly connected to the first insulating layer. FIG. 3 is a schematic diagram of the first type of the first pressure sensing piece and the second pressure sensing piece of the first embodiment of the present invention that are not under pressure. FIG. 4 is a schematic diagram of the first type of the first pressure sensing piece and the second pressure sensing piece under pressure of the first embodiment of the present invention. 5 is a schematic cross-sectional view of a second type of first pressure-sensing sheet of a first embodiment of the present invention, showing that a first low-conductivity circuit is provided between a first high-conductivity circuit and a first insulating layer. FIG. 6 is a schematic diagram of the second type of the first pressure sensing piece and the second pressure sensing piece that are not under pressure in the first embodiment of the present invention. FIG. 7 is a schematic diagram of the pressure of the first pressure sensing piece and the second pressure sensing piece of the second type of the first embodiment of the present invention. FIG. 8 is a system schematic diagram of the second embodiment of the present invention. FIG. 9 is a system schematic diagram of a third embodiment of the present invention. 10 is a schematic diagram of the connection between the first pressure sensing piece and the second pressure sensing piece in the third embodiment of the present invention. FIG. 11 is a schematic diagram of the first pressure sensor piece and the second pressure sensor piece superimposed on each other and pressed under the third embodiment of the present invention.

100: pressure sensing system

10: The first pressure sensor

11: The first flexible substrate

111: surface

12: The first conductive totem

122: the first low conductivity line

123: First insulation layer

124: First Transmission Department

13: The first pressure sensing area

20: Second pressure sensor

21: Second flexible substrate

211: Surface

22: Second conductive totem

221: Second highest conductive line

222: The second lowest conductive line

224: Second Transmission Department

23: Second pressure sensing area

30: Processing device

Claims (9)

A pressure sensing system includes: a first pressure sensing piece having a first flexible substrate and a first conductive totem, the first conductive totem is disposed on the surface of the first flexible substrate, the first A conductive totem has a first high conductivity circuit and a first low conductivity circuit electrically connected to the first high conductivity circuit, the first low conductivity circuit extending from the first high conductivity circuit and on the first flexible substrate Forming a first pressure sensing area, the area of the first pressure sensing area is larger than the area occupied by the first highly conductive circuit on the first flexible substrate; a second pressure sensing piece having a second A flexible substrate and a second conductive totem, the second conductive totem is disposed on the surface of the second flexible substrate, the second conductive totem has a second highly conductive circuit and one of the second highly conductive circuit electrically connected A second low-conductivity circuit, the second low-conductivity circuit extends from the second high-conductivity circuit and forms a second pressure sensing area on the second flexible substrate, the area of the second pressure sensing area is larger than the first The area occupied by the second highly conductive circuit on the second flexible substrate, wherein the second pressure-sensing sheet is provided with a surface of the second conductive totem superimposed on the first pressure-sensing sheet and the first One face of the conductive totem; and a processing device, which is electrically connected to the first pressure sensing piece and the second pressure sensing piece, the processing device outputs an electric power to the first pressure sensing piece, and the second pressure sensing piece The pressure sensing piece obtains a pressure sensing signal, and compares the pressure sensing signal with a threshold value to determine whether the first pressure sensing piece and the second pressure sensing piece are pressed by an external force. The pressure sensing system according to claim 1, wherein the first low-conductivity circuit is divided into a first coverage area and a first layout area, and the first coverage area is disposed on the first high-conductivity circuit away from the first On one side of the flexible substrate, the first layout area is provided on the first flexible substrate; the second low-conductivity circuit is divided into a second coverage area and a second layout area, and the second coverage area is provided on the first Two high conductive lines far From one side of the second flexible substrate, the second layout area is provided on the second flexible substrate. The pressure sensing system according to claim 2, wherein the first pressure sensing sheet further has a first insulating layer covering the first highly conductive circuit away from one of the first flexible substrates The second pressure-sensing sheet further has a second insulating layer covering the side of the second highly conductive circuit away from the second flexible substrate. The pressure sensing system according to claim 3, wherein the first insulating layer covers the first covering area; and the second insulating layer covers the second covering area. The pressure sensing system according to claim 1, wherein the number of the first conductive totems is plural, each first conductive totem has a first transmission part, and each first transmission part is electrically connected to the processing device independently , The two ends of each first transmission part are respectively connected to the processing device and each first conductive totem; the number of the second conductive totem is plural, each second conductive totem has a second transmission part, each The second transmission part is electrically connected to the processing device independently, and both ends of each second transmission part are respectively connected to the processing device and each second conductive totem. The pressure sensing system according to claim 1, wherein the number of the first conductive totems is plural, each first conductive totem has a first transmission portion, and each of the first conductive totems is arranged in a two-dimensional array, each The first transmission portions of the first conductive totem are connected to each other along a first direction; the number of the second conductive totems is plural, each second conductive totem has a second transmission portion, and each of the second conductive totems has two The two-dimensional array is arranged, and the second transmission portions of the second conductive totems are connected to each other along a second direction, and the first direction and the second direction cross each other. The pressure sensing system according to claim 1, wherein the pressure sensing signal is a current value; when the pressure sensing signal is greater than the critical value, the processing device determines the first pressure sensing piece and the second pressure sensing The test piece is pressed by external force. A pressure sensing setting method is performed using the pressure sensing system according to any one of claims 1 to 7, and the steps of the pressure sensing setting method include: the processing device receives the first pressure sensing sheet and the The second pressure sensing piece is not pressed by an external force, an initial signal generated by the second pressure sensing piece; the processing device receives the first pressure sensing piece and the second pressure sensing piece being pressed by an external force , A pressure signal is generated by the second pressure sensing piece; and the processing device processes the initial signal and the pressure signal to generate the threshold value. The pressure sensing setting method according to claim 8, wherein the processing device divides the sum of the initial signal and the pressure signal by a reference value to obtain the critical value.

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