Anti-pinch ground mat sensor of automatic door

Abstract

The utility model discloses an automatic door anti-pinch ground mat sensor which comprises an anti-pinch ground mat sensor body, and the anti-pinch ground mat sensor body comprises an upper anti-skid rubber mat, an upper non-woven fabric, a conductive fabric, two sensor leads, a pressure sensing lead, a lower non-woven fabric and a lower anti-skid rubber mat. The whole anti-pinch ground mat sensor body can be independently used, when a person or a pet exists in front of and behind a door or under the door or other objects with the weight exceeding the triggering weight are placed, an anti-pinch signal can be triggered to enable an automatic door to be opened and not to be closed, so that the anti-pinch function is achieved, the anti-pinch signal is triggered according to the weight borne by the anti-pinch ground mat sensor, and the anti-pinch ground mat sensor is prevented from being damaged. The anti-pinch ground mat sensor can trigger a signal as long as an object exceeding the trigger weight is on the anti-pinch ground mat sensor, so that people, pets and the like can completely trigger the signal on the anti-pinch ground mat sensor, the misjudgment risk is reduced, and compared with other anti-pinch sensor production processes in the market, the anti-pinch ground mat sensor is simpler in production process and lower in cost.

Description

Technical Field

[0001] This utility model relates to the field of automatic door technology, and in particular to an automatic door anti-pinch floor mat sensor. Background Technology

[0002] With the development of technology, automatic doors have been widely used. Automatic doors with automatic opening and closing systems, such as swing doors, entrance hinge doors, and double doors, all need to be equipped with anti-pinch systems to prevent people, pets, etc. from being pinched when the automatic door closes. Currently, common anti-pinch devices on the market include: anti-pinch with the door opener itself, anti-pinch with the door opener, anti-pinch with the door opener, anti-pinch with the door opener, anti-pinch with the door opener, anti-pinch with the door opener, and anti-pinch with the door opener with the door opener, and anti-pinch with the door opener with the door opener with the door opener. The above anti-pinch devices have the following shortcomings in use: (1) Anti-pinch with the door opener: the door can only be anti-pinch after it is blocked by an object; (2) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (3) Anti-pinch with the door opener: the door opener is blocked by the door opener with the door opener; (4) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (5) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (6) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (7) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (8) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (9) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (10) Anti-pinch with the door opener: the door opener is difficult to install and debug and has a small sensing range; (11) Anti-pinch with the door opener: the door opener is Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic door anti-pinch floor mat sensor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic door anti-pinch mat sensor includes an anti-pinch mat sensor body, which comprises an upper anti-slip mat, an upper non-woven fabric, a conductive fabric, two sensor leads, a pressure-sensitive wire, a lower non-woven fabric, and a lower anti-slip mat. The upper anti-slip mat, upper non-woven fabric, conductive fabric, pressure-sensitive wire, lower non-woven fabric, and lower anti-slip mat are sequentially pasted and fixed from top to bottom. The corners of the upper anti-slip mat are aligned and fixed with the corners of the lower anti-slip mat. One of the two sensor leads is electrically connected to one end of the pressure-sensitive wire, and the other sensor lead is soldered and fixed to the top of the conductive fabric. The two sensor leads are stacked and electrically connected to the same sensor circuit board.

[0006] Preferably, the pressure-sensitive wire comprises a copper wire and a piezoresistive material covering the outside of the copper wire, wherein the cross-sectional area of ​​the copper wire is 0.3 square millimeters and the diameter of the piezoresistive material is 1 mm.

[0007] Preferably, the bottom of the upper anti-slip pad, the bottom of the upper non-woven fabric, the bottom of the conductive fabric, and the top of the lower anti-slip pad are all bonded with adhesive backing, and the upper anti-slip pad, upper non-woven fabric, conductive fabric, lower non-woven fabric, and lower anti-slip pad are bonded and fixed by their respective adhesive backings.

[0008] Preferably, the bonding area between the conductive cloth and the pressure-sensitive wire is a raised bulge shape, so that the conductive cloth and the pressure-sensitive wire are in full contact. The lower non-woven fabric is printed with a serpentine fixing path adapted to the pressure-sensitive wire, and the pressure-sensitive wire is sewn and fixed to the lower non-woven fabric according to the serpentine fixing path by sewing thread.

[0009] Preferably, the length and width of the lower anti-slip pad are both 5mm larger than the length and width of the lower non-woven fabric, and the length and width of the upper anti-slip pad are both 5mm larger than the length and width of the upper non-woven fabric.

[0010] Preferably, the sensor circuit board outputs either a low-level trigger signal or an output voltage signal.

[0011] Preferably, the circuit designed for the sensor circuit board to output a low-level trigger signal includes sockets J1, J2, and J3. Pins 1 and 2 of socket J3 are electrically connected to the corresponding sensor leads, pin 2 of socket J1 is grounded, pin 1 of socket J1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and one end of resistor R4, the other ends of capacitor C1 and C2 are grounded, the other end of resistor R4 is electrically connected to one end of resistor R6, the other end of resistor R6 is electrically connected to one end of resistor R7 and the sliding end of resistor R6, the other end of resistor R7 is grounded, the other end of resistor R4 is also electrically connected to pin 3 of operational amplifier U1, pin 1 of operational amplifier U1 is electrically connected to one end of resistor R5 and resistor R One end of resistor R8 is electrically connected to the voltage VCC at the other end of resistor R5. The other end of resistor R8 is electrically connected to pin 1 of socket J3. Pin 2 of operational amplifier U1 is grounded. Pin 5 of operational amplifier U1 is electrically connected to the voltage VCC. Pin 4 of operational amplifier U1 is electrically connected to one end of indicator LED1 and the emitter of transistor N1. The other end of indicator LED1 is electrically connected to one end of resistor R2, and the other end of resistor R2 is electrically connected to the voltage VCC. The collector of transistor N1 is electrically connected to pin 2 of socket J2. The base of transistor N1 is electrically connected to one end of resistor R3 and one end of resistor R1. The other end of resistor R1 is electrically connected to the voltage VCC. The other end of resistor R3 is grounded. Pin 1 of socket J2 is grounded.

[0012] Preferably, the circuit designed for the sensor circuit board to output a voltage signal includes sockets J4, J5, and J6. Pins 1 and 2 of socket J5 are electrically connected to the corresponding sensor leads. Pin 2 of socket J4 is grounded. Pin 1 of socket J4 is electrically connected to one end of capacitor C3, one end of capacitor C4, and one end of resistor R9. The other ends of capacitor C3 and capacitor C4 are grounded. The other end of resistor R9 is electrically connected to pin 1 of socket J5. Pin 2 of socket J5 is electrically connected to pin 1 of operational amplifier U2 and one end of resistor R10. The other end of resistor R10 and pin 2 of operational amplifier U2 are grounded. Pins 3 and 4 of operational amplifier U2 are electrically connected to one end of the same indicator LED2. The other end of indicator LED2 is electrically connected to one end of resistor R11. The other end of resistor R11 and pin 1 of socket J6 are grounded. Pins 3 and 4 of operational amplifier U2 are both electrically connected to pin 2 of socket J6.

[0013] Compared with existing technologies, the beneficial effects of this utility model are:

[0014] This invention allows the entire anti-pinch floor mat sensor to be used independently. When there are people, pets, or other objects exceeding the trigger weight placed in front of, behind, or under the door, an anti-pinch signal is triggered, causing the automatic door to open without closing, thus achieving the anti-pinch function. The anti-pinch signal is triggered based on the weight received by the anti-pinch floor mat sensor. As long as there is something exceeding the trigger weight on the anti-pinch floor mat sensor, a signal will be triggered, ensuring 100% triggering of the signal when there are people or pets on it, reducing the risk of false alarms. Compared to other anti-pinch sensors on the market, the manufacturing process is simpler and the cost is lower. Attached Figure Description

[0015] Figure 1 An exploded view of an automatic door anti-pinch floor mat sensor proposed in this utility model;

[0016] Figure 2 This is a cross-sectional view of the pressure-sensitive wire of an automatic door anti-pinch floor mat sensor proposed in this utility model;

[0017] Figure 3 This is a circuit diagram showing the design of the sensor circuit board outputting a low-level trigger signal in an automatic door anti-pinch floor mat sensor proposed in this utility model.

[0018] Figure 4 This is a circuit diagram showing the design of the sensor circuit board outputting a voltage signal in an automatic door anti-pinch floor mat sensor proposed in this utility model.

[0019] In the diagram: 1. Upper anti-slip pad; 2. Upper non-woven fabric; 3. Conductive fabric; 301. Raised bulge shape; 4. Sensor lead wire; 5. Pressure-sensitive wire; 501. Copper wire; 502. Piezoresistive material; 6. Lower non-woven fabric; 7. Lower anti-slip pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 An automatic door anti-pinch mat sensor includes an anti-pinch mat sensor body, which comprises an upper anti-slip mat 1, an upper non-woven fabric 2, a conductive fabric 3, two sensor leads 4, a pressure-sensitive wire 5, a lower non-woven fabric 6, and a lower anti-slip mat 7. The upper anti-slip mat 1, upper non-woven fabric 2, conductive fabric 3, pressure-sensitive wire 5, lower non-woven fabric 6, and lower anti-slip mat 7 are sequentially glued and fixed from top to bottom. Adhesive backing is glued and fixed to the bottom of the upper anti-slip mat 1, the bottom of the upper non-woven fabric 2, the bottom of the conductive fabric 3, and the top of the lower anti-slip mat 7. The upper anti-slip mat 1, upper non-woven fabric 2, and conductive fabric... 3. The lower non-woven fabric 6 and the lower anti-slip pad 7 are respectively bonded and fixed by corresponding adhesive backing; the bonding part between the conductive fabric 3 and the pressure-sensitive wire 5 is a raised bulge shape 301, so that the conductive fabric 3 and the pressure-sensitive wire 5 are in full contact. The lower non-woven fabric 6 is printed with a serpentine fixing path that matches the pressure-sensitive wire 5. The pressure-sensitive wire 5 is sewn and fixed to the lower non-woven fabric 6 by sewing thread according to the serpentine fixing path; the pressure-sensitive wire 5 includes a copper wire 502 and a pressure-resistance material 501 covering the outside of the copper wire 502. The cross-sectional area of ​​the copper wire 502 is 0.3 square millimeters, and the diameter of the pressure-resistance material 501 is 1 mm.

[0022] The corners of the upper anti-slip pad 1 are aligned and fixed with the corners of the lower anti-slip pad 7. The length and width of the lower anti-slip pad 7 are both 5mm larger than the length and width of the lower non-woven fabric 6, and the length and width of the upper anti-slip pad 1 are both 5mm larger than the length and width of the upper non-woven fabric 2.

[0023] One of the two sensor leads 4 is electrically connected to one end of the pressure-sensitive wire 5, and the other sensor lead 4 is welded and fixed to the top of the conductive cloth 3. The two sensor leads 4 are stacked and electrically connected to the same sensor circuit board.

[0024] The sensor circuit board outputs either a low-level trigger signal or a voltage signal. When the sensor circuit board outputs a low-level trigger signal, the designed circuit includes sockets J1, J2, and J3. Pins 1 and 2 of socket J3 are electrically connected to the corresponding sensor leads 4. Pin 2 of socket J1 is grounded. Pin 1 of socket J1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and one end of resistor R4. The other ends of capacitors C1 and C2 are grounded. The other end of resistor R4 is electrically connected to one end of resistor R6. The other end of resistor R6 is electrically connected to one end of resistor R7 and the sliding contact of resistor R6. The other end of resistor R7 is grounded. The other end of resistor R4 is also electrically connected to pin 3 of operational amplifier U1. Pin 1 of operational amplifier U1 is electrically connected to... There are resistors R5 and R8 at one end. The other end of resistor R5 is electrically connected to voltage VCC. The other end of resistor R8 is electrically connected to pin 1 of socket J3. Pin 2 of operational amplifier U1 is grounded. Pin 5 of operational amplifier U1 is electrically connected to voltage VCC. Pin 4 of operational amplifier U1 is electrically connected to one end of indicator light LED1 and the emitter of transistor N1. The other end of indicator light LED1 is electrically connected to one end of resistor R2. The other end of resistor R2 is electrically connected to voltage VCC. The collector of transistor N1 is electrically connected to pin 2 of socket J2. The base of transistor N1 is electrically connected to one end of resistor R3 and one end of resistor R1. The other end of resistor R1 is electrically connected to voltage VCC. The other end of resistor R3 is grounded. Pin 1 of socket J2 is grounded.

[0025] The circuit designed for the sensor circuit board to output voltage signals includes sockets J4, J5, and J6. Pins 1 and 2 of socket J5 are electrically connected to the corresponding sensor leads 4. Pin 2 of socket J4 is grounded. Pin 1 of socket J4 is electrically connected to one end of capacitor C3, one end of capacitor C4, and one end of resistor R9. The other ends of capacitor C3 and capacitor C4 are grounded. The other end of resistor R9 is electrically connected to pin 1 of socket J5. Pin 2 of socket J5 is electrically connected to pin 1 of operational amplifier U2 and one end of resistor R10. The other end of resistor R10 and pin 2 of operational amplifier U2 are grounded. Pins 3 and 4 of operational amplifier U2 are electrically connected to one end of the same indicator LED2. The other end of indicator LED2 is electrically connected to one end of resistor R11. The other end of resistor R11 and pin 1 of socket J6 are grounded. Pins 3 and 4 of operational amplifier U2 are both electrically connected to pin 2 of socket J6.

[0026] This invention allows the entire anti-pinch floor mat sensor to be used independently. When there are people, pets, or other objects exceeding the trigger weight placed in front of, behind, or under the door, an anti-pinch signal is triggered, causing the automatic door to open without closing, thus achieving the anti-pinch function. The anti-pinch signal is triggered based on the weight received by the anti-pinch floor mat sensor. As long as there is something exceeding the trigger weight on the anti-pinch floor mat sensor, a signal will be triggered, ensuring 100% triggering of the signal when there are people or pets on it, reducing the risk of false alarms. Compared to other anti-pinch sensors on the market, the manufacturing process is simpler and the cost is lower.

[0027] Working principle: During assembly, firstly, the pressure-sensitive wire 5 is sewn to the top of the lower non-woven fabric 6 with sewing thread. Then, the conductive cloth 3 with adhesive backing is attached to the pressure-sensitive wire 5 and the lower non-woven fabric 6. A sensor lead wire 4 is soldered to one end of the pressure-sensitive wire 5 and the conductive cloth 3 respectively. Then, by pressing the part where the conductive cloth 3 and the pressure-sensitive wire 5 are bonded, the conductive cloth 3 has a raised bulge shape 301 of the pressure-sensitive wire 3, so that the conductive cloth 3 can fully contact the pressure-sensitive wire 5. Next, the upper non-woven fabric 2 with adhesive backing is attached above the conductive cloth 3. The lower anti-slip pad 7 is placed on the worktable with the adhesive backing side facing up. The center of the lower non-woven fabric 6 is aligned and attached to the lower anti-slip pad 7. The upper anti-slip pad 1 is aligned and attached to the lower anti-slip pad 7 with the adhesive backing side facing down, and pressed firmly to prevent water leakage. At the same time, the upper anti-slip pad 1 is attached to the top of the upper non-woven fabric 2 through the adhesive backing. The assembly is completed.

[0028] When the anti-pinch floor mat sensor body is not subjected to external pressure, the impedance between the copper wire 501 of the pressure sensing wire 5 and the conductive cloth 3 is greater than 10mΩ. When pressure is increased on the anti-pinch floor mat sensor body and the pressure is greater than 0.5kg, the impedance between the copper wire 501 and the conductive cloth 3 is 300KΩ. When the pressure is greater than 50kg, the resistance between the copper wire 501 and the conductive cloth 3 is less than 50Ω, and the resistance signal is led out to the sensor circuit board through the sensor lead 4.

[0029] The resistance of the anti-pinch floor mat sensor body is represented by Rpress;

[0030] For an automatic door system with a low - level trigger anti - pinch signal, a low - level trigger signal needs to be output. The input voltage VCC of the sensor circuit board is 3.3V - 36V. The VCC voltage passes through capacitors C1 and C2 for filtering to obtain a relatively stable voltage. The VCC voltage is divided by resistors R4, R6, and R7 to obtain the reference voltage Vref (the formula for calculating the reference voltage Vref is Vref=(R6 + R7) / (R4 + R6 + R7)*VCC); the VCC voltage is divided by resistors R5 and R8 to obtain the sampling voltage Vsample. When there is no pressure on the surface of the anti - pinch floor mat sensor body, Rpress is greater than 10mΩ, and at this time Vsample is approximately equal to the VCC voltage. When the pressure on the surface of the anti - pinch floor mat sensor body is greater than 1kg, Rpress quickly drops below 300KΩ. As the pressure increases, Rpress decreases. When the pressure on the surface of the anti - pinch floor mat sensor body is greater than 1kg, Vsample=(R8 + Rpress) / (R5 + R8 + Rpress)*VCC. When Vref < Vsample, the pin 4 of the operational amplifier U1 outputs a high level. At this time, the indicator LED1 goes out. The Ve of the triode N1 > Vb, and the triode N1 is cut off and Out has no signal output. When Vref > Vsample, the pin 4 of the operational amplifier U1 outputs a low level, the indicator LED1 lights up to indicate that the anti - pinch signal is triggered. The Ve of the triode N1 < Vb, and the triode N1 conducts. At this time, Out outputs a low level to the automatic door system to prompt that the anti - pinch signal is triggered;

[0031] In addition, the resistance value of the resistor R6 can adjust Vref, and thus can adjust the trigger sensitivity of the anti - pinch floor mat sensor. When the resistance of the resistor R6 decreases, Vref decreases, and the trigger pressure required for the anti - pinch floor mat sensor body increases. When the user uses the anti - pinch floor mat sensor body in front of or behind the door as the anti - pinch trigger signal for the automatic door, adjusting the trigger pressure can shield lighter objects such as shoes. In this way, objects below the trigger pressure weight placed on the anti - pinch floor mat sensor body will not trigger the anti - pinch signal. Only objects such as people and pets that exceed the trigger pressure weight on the anti - pinch floor mat sensor will trigger the anti - pinch signal, thus preventing false triggering;

[0032] When the anti-pinch signal is acquired by an analog voltage ADC input in an automatic door system, a voltage signal needs to be output. The input voltage VCC of the sensor circuit board is 3.3V. The voltage VCC is filtered by capacitors C3 and C4 to obtain a relatively stable voltage. The voltage VCC is then divided by resistors R9 and R8 to obtain Vsample, which is input to pin 1 of operational amplifier U2. Pins 3 and 4 of operational amplifier U2 are connected, making Vout = Vsample. When there is no pressure on the surface of the anti-pinch mat sensor, Rpress is greater than 10mΩ. At this time, Vsample is approximately equal to 0V, and Vout... When the output is 0V, indicator LED2 is off. When the surface pressure of the anti-pinch floor mat sensor body is greater than 1kg, Rpress drops rapidly to below 300KΩ. As the pressure increases, Rpress decreases. When the surface pressure of the anti-pinch floor mat sensor body is greater than 1kg, Vout=Vsample=R8 / (R5+Rpress+R8)*VCC, and indicator LED2 lights up to indicate that the anti-pinch signal is triggered. The automatic door can calculate the weight of the item on the anti-pinch floor mat sensor body based on the voltage signal output by the anti-pinch floor mat sensor circuit board, and thus determine whether the anti-pinch signal is triggered.

[0033] The anti-pinch mat sensor can be used independently in front of or behind an automatic door, functioning as both an anti-pinch sensor and a mat. Users can also cover the sensor with other mats if they prefer a different design. When a person, pet, or other object exceeding the trigger weight is placed in front of, behind, or under the door, an anti-pinch signal is triggered, opening the automatic door and preventing it from closing. The anti-pinch signal is triggered by the weight applied to the sensor; any object exceeding the trigger weight will trigger the signal, ensuring 100% triggering when someone or a pet is on it, reducing the risk of false alarms. Compared to other anti-pinch sensors on the market, its manufacturing process is simpler and less expensive.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic door anti-pinch floor mat sensor, characterized in that, The device includes an anti-pinch mat sensor body, which comprises an upper anti-slip mat (1), an upper non-woven fabric (2), a conductive fabric (3), two sensor leads (4), a pressure-sensitive wire (5), a lower non-woven fabric (6), and a lower anti-slip mat (7). The upper anti-slip mat (1), upper non-woven fabric (2), conductive fabric (3), pressure-sensitive wire (5), lower non-woven fabric (6), and lower anti-slip mat (7) are pasted and fixed in sequence from top to bottom. The corners of the upper anti-slip mat (1) are aligned and fixed with the corners of the lower anti-slip mat (7). One of the two sensor leads (4) is electrically connected to one end of the pressure-sensitive wire (5), and the other sensor lead (4) is welded and fixed to the top of the conductive fabric (3). The two sensor leads (4) are stacked and electrically connected to the same sensor circuit board.

2. The automatic door anti-pinch floor mat sensor according to claim 1, characterized in that, The pressure-sensitive wire (5) includes a copper wire (502) and a piezoresistive material (501) covering the outside of the copper wire (502). The cross-sectional area of ​​the copper wire (502) is 0.3 square millimeters, and the diameter of the piezoresistive material (501) is 1 mm.

3. The automatic door anti-pinch floor mat sensor according to claim 1, characterized in that, The bottom of the upper anti-slip pad (1), the bottom of the upper non-woven fabric (2), the bottom of the conductive fabric (3), and the top of the lower anti-slip pad (7) are all bonded with adhesive backing. The upper anti-slip pad (1), the upper non-woven fabric (2), the conductive fabric (3), the lower non-woven fabric (6), and the lower anti-slip pad (7) are bonded and fixed with their respective adhesive backings.

4. The automatic door anti-pinch floor mat sensor according to claim 1, characterized in that, The bonding part between the conductive cloth (3) and the pressure-sensitive wire (5) is a raised bulge shape (301) to ensure full contact between the conductive cloth (3) and the pressure-sensitive wire (5). The lower non-woven fabric (6) is printed with a serpentine fixing path that matches the pressure-sensitive wire (5). The pressure-sensitive wire (5) is sewn and fixed to the lower non-woven fabric (6) by sewing thread along the serpentine fixing path.

5. An automatic door anti-pinch floor mat sensor according to claim 1, characterized in that, The length and width of the lower anti-slip pad (7) are both 5 mm larger than the length and width of the lower non-woven fabric (6), and the length and width of the upper anti-slip pad (1) are both 5 mm larger than the length and width of the upper non-woven fabric (2).

6. An automatic door anti-pinch floor mat sensor according to claim 1, characterized in that, The sensor circuit board outputs either a low-level trigger signal or an output voltage signal.

7. An automatic door anti-pinch floor mat sensor according to claim 6, characterized in that, When the sensor circuit board outputs a low-level trigger signal, the designed circuit includes sockets J1, J2, and J3. Pins 1 and 2 of socket J3 are electrically connected to the corresponding sensor leads (4). Pin 2 of socket J1 is grounded. Pin 1 of socket J1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and one end of resistor R4. The other ends of capacitor C1 and capacitor C2 are grounded. The other end of resistor R4 is electrically connected to one end of resistor R6. The other end of resistor R6 is electrically connected to one end of resistor R7 and the sliding end of resistor R6. The other end of resistor R7 is grounded. The other end of resistor R4 is also electrically connected to pin 3 of operational amplifier U1. Pin 1 of operational amplifier U1 is electrically connected to one end of resistor R5 and resistor R One end of resistor R8 is electrically connected to the voltage VCC at the other end of resistor R5. The other end of resistor R8 is electrically connected to pin 1 of socket J3. Pin 2 of operational amplifier U1 is grounded. Pin 5 of operational amplifier U1 is electrically connected to the voltage VCC. Pin 4 of operational amplifier U1 is electrically connected to one end of indicator LED1 and the emitter of transistor N1. The other end of indicator LED1 is electrically connected to one end of resistor R2, and the other end of resistor R2 is electrically connected to the voltage VCC. The collector of transistor N1 is electrically connected to pin 2 of socket J2. The base of transistor N1 is electrically connected to one end of resistor R3 and one end of resistor R1. The other end of resistor R1 is electrically connected to the voltage VCC. The other end of resistor R3 is grounded. Pin 1 of socket J2 is grounded.

8. An automatic door anti-pinch floor mat sensor according to claim 6, characterized in that, The circuit designed for the output voltage signal of the sensor circuit board includes sockets J4, J5 and J6. Pins 1 and 2 of socket J5 are electrically connected to the corresponding sensor leads (4). Pin 2 of socket J4 is grounded. Pin 1 of socket J4 is electrically connected to one end of capacitor C3, one end of capacitor C4 and one end of resistor R9. The other ends of capacitor C3 and capacitor C4 are grounded. The other end of resistor R9 is electrically connected to pin 1 of socket J5. Pin 2 of socket J5 is electrically connected to pin 1 of operational amplifier U2 and one end of resistor R10. The other end of resistor R10 and pin 2 of operational amplifier U2 are grounded. Pins 3 and 4 of operational amplifier U2 are electrically connected to one end of the same indicator LED2. The other end of indicator LED2 is electrically connected to one end of resistor R11. The other end of resistor R11 and pin 1 of socket J6 are grounded. Pins 3 and 4 of operational amplifier U2 are electrically connected to pin 2 of socket J6.

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