CN117481543A - Landing sensor and sensing method - Google Patents

Abstract

The application relates to a seating sensor and a sensing method, and belongs to the technical field of intelligent closestool accessories. In order to solve the problems that whether a human body is seated or not can be detected only by a single point or by adding sensing points in the existing seat ring, the function failure is easily caused when the sensing points are not contacted due to the adjustment of the sitting posture in the use process, and the user experience is poor; the utility model provides a sensor body and epitaxial conductive electrode, epitaxial conductive electrode and sensor body separately set up and connect through the wire, epitaxial conductive electrode's shape, thickness, size carry out the adaptation according to the seat circle appearance and adjust, and epitaxial conductive electrode installs in the seat circle and is close to the lower surface of seat circle, has: 1. the whole seat ring can trigger the sensor without the limitation of the induction area; 2. the sensor can output different electric signals by judging different seating positions, so that the possibility of expanding the functions of the product to higher orders is realized; the effect of reducing the production and manufacturing cost can be achieved while the functions are realized.

Description

Landing sensor and sensing method

Technical Field

The application relates to the technical field of sensors, in particular to a seating sensor and an induction method.

Background

Taking an intelligent closestool as an example, the existing sensor is installed and fixed on the inner wall of a non-conductor seat ring and used for detecting whether a human body is sitting on the seat ring, the effective triggering/detecting range of the sensor is a sensing surface assembled with the sensor or the range of the sensing surface of the sensor extending outwards by 50mm at most, the upper surface of the seat ring extends upwards by 50mm, when the human body or a detected object body simultaneously meets two conditions of contacting the outer wall of the non-conductor seat ring provided with the sensor and the condition that the outer wall is in the effective triggering detecting range of the sensor, an MCU connected with the sensor can judge whether the sensor is triggered by acquiring different electric signals fed back by the sensor, and the intelligent closestool starts or closes a certain function or various linkage functions according to the signals; if the human body or the detected object is not fully contacted (i.e. the trigger point is 50mm above the horizontal distance of the sensor mounting position or 50mm above the trigger surface) and the outer wall of the non-conductor seat ring provided with the sensor, the MCU connected with the sensor can always obtain the same electric signal of the sensor, namely can not recognize and distinguish the effective trigger exceeding the horizontal distance of the sensor by 50mm or above the trigger surface by 50mm, thus a series of problems can be brought to the sensor, such as sitting on the seat ring or children can not contact the effective detection range of the sensor; when the disabled cannot trigger within the effective detection range of the sensor; many application scenarios when the seat ring moves back and forth beyond the effective detection range of the sensor can cause misjudgment of the sensor, so that the preset function or operation is inconsistent with the actual application.

More specifically, as in fig. 1, the seat ring of the conventional intelligent toilet is perforated on the first conductive film 101 of the heating wire of the non-conductive seat ring 100 and the fixed seat ring, the plastic thickness where the first sensor body 109 is installed on the inner surface of the insulating seat ring 100 is reduced, the first sensor body 109 is fixedly installed therein, and the sensor wire is connected to the main board inside the product body through the hollow connecting shaft of the seat ring and the main body to acquire signals and process the signals to open or close a function or various linkage functions. Since the upper surface of the present first sensor body 109 is the sensing surface, it is important to keep the surface-to-surface contact with the insulating seat ring 100, otherwise, there will be failure, and the assembly failure of the present sensor can be summarized as follows:

1. such as excessive assembly clearance between the sensor and the non-conductor race;

2. the sensing surface of the sensor cannot be completely attached to the inner surface of the non-conductor seat ring or is inclined;

3. when the sensor is mounted, the sensor body must keep a certain gap with the first conductive film 101 fixedly assembled with the surrounding conductors such as the heater wire/mounting screw/and the heater wire, otherwise false triggering occurs, and the overall appearance of the non-conductor race 100 is a curved surface shape, so that it is difficult to increase the sensing range by increasing the size of the sensor sensing plate.

Therefore, the existing sensor can only detect whether a human body or a detected object is effectively triggered through a small area, and the accuracy and the assembly process requirements of the sensor are high.

The first sensor body 109 now on the seat ring has the following problems:

first, the sensors are mounted on one or several of the left and right inner surfaces of the seat ring, so that the situation that the user cannot trigger effectively is avoided by increasing the number of the sensors, if the effective triggering range of the sensors is not touched, the first sensor body 109 will always output an un-triggered electric signal.

Secondly, the thickness of the portion of the inner surface where the sensor is mounted is thinner than that of the other portion of the non-conductive material race 100, and a screw fixing structure is required for mounting the first sensor body 109, so that during injection molding, a reduction is formed on the surface of the portion, resulting in a reduction in injection molding speed and an increase in injection molding defects.

Third, the nonconductor race 100 and the product body are used for smooth rotation of the nonconductor race 100 through two perforated shafts 104 with diameters of 10-20 mm on the left and right. The through holes on one rotating shaft are two wires (107, 108) connected with the heating wire, two wires of the temperature sensor and three wires which are combined to form a first sensor body 109, and seven wires enter the inside of the host through a hollow rotating shaft. Because the aperture of the rotating shaft is too small and the first sensor body 109 is mechanically fixed on the inner surface of the non-conductive material seat ring 100, once the sensor fails, the whole non-conductive material seat ring 100 can only be scrapped, and maintenance can not be performed by replacing the sensor, thus extremely wasting resources and increasing the cost of users easily, and simultaneously increasing the production risk of manufacturers.

Fourth, the temperature of the surface of the non-conductive material race 100 is lower than the temperature of the non-conductive material race 100 at the non-conductive material race because of the first conductive film of the heating wire 103 and the fixed race heating wire, which is caused by the holes formed in the first sensor body 101 of the fixed race heating wire.

Disclosure of Invention

In view of the above-mentioned drawbacks (problems) of the prior art, the present application provides an in-place sensor and a sensing method for achieving a non-contact sensing sensor system by using an extension electrode (sensing electrode plate) of the sensor as a way of enhancing a field effect by connecting a conductor or adding a conductor to the periphery of the connected conductor.

In order to achieve the above object and other related objects, the present application adopts the following technical solutions:

the utility model provides a landing sensor, includes sensor body and epi conductive electrode, epi conductive electrode and sensor body separately set up and pass through the wire and connect, epi conductive electrode's shape, thickness, size are according to the seat ring appearance and are carried out the adaptation adjustment, and epi conductive electrode installs in the seat ring and is close to the lower surface of seat ring.

Preferably, the heating device further comprises a seat ring made of a non-conductor material, wherein the interior of the seat ring is hollow and is paved with an extension conductive electrode, the extension conductive electrode adopts a conductive film made of a conductive material, and the heating wire is positioned in the seat ring;

or a race of conductive material: the method is characterized in that the conductive material is fixedly arranged on the surface or inside of the non-conductive material seat ring through spraying/embedding/pasting/structure.

Preferably, the heating wire powered by the AC power supply is connected with an anode power line and a cathode power line, and the cathode power line is also connected with a diode in series;

or the heating wire powered by the DC power supply.

Preferably, the seat ring is provided with a wire outlet hole, and at least two groups of wires are respectively a group of heating wire power wires and a group of wires of the seat sensor.

Preferably, the equivalent capacitance when the conductive film contacts the seat ring is C2, the equivalent capacitance between the conductive film and the heating wire is C3, the equivalent capacitance between the sensor main body and the conductive film is C3, and the total rated capacity is determined as:

preferably, the conductive film is copper foil or aluminum foil.

A sensing method utilizes the sitting sensor to sense human body touch.

Preferably, the sensor main body is arranged outside the seat ring, and the conductive films made of conductive materials of the heating wire and the heating wire of the fixed seat ring are used as the epitaxial electrodes of the sensor main body and are conducted and connected with the conductive films through a wire.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the seat ring is not required to be provided with a sensor main body, so that the production and the manufacturing are convenient;

2. the mounting structure of the sensor main body is canceled, so that the seat ring structure is more stable, injection molding is easier, and the injection molding reject ratio is greatly reduced;

3. the replacement and the use of the user are easier and simpler;

4. the detection surface is wider, and the triggering is more sensitive.

Drawings

FIG. 1 is a prior art structural reference schematic;

FIG. 2 is a schematic structural diagram of an embodiment of the present application;

FIG. 3 is a schematic signal diagram of a capacitance sensing change in the structure of FIG. 1;

FIG. 4 is a signal diagram of a capacitance sensing variation under the implementation shown in FIG. 2;

fig. 5 is a schematic structural diagram of a second conductive film according to other embodiments of the present application.

Reference numerals of main components are explained:

100. a seat ring; 101. a first conductive film; 102. a second conductive film; 103. a heating wire; 104. a perforated rotating shaft; 105. a diode; 106. a conductive wire rod; 107. a positive electrode power supply line; 108. a negative electrode power supply line; 109. a first sensor body; 110. a second sensor body.

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that, the illustrations provided in the following embodiments merely illustrate the basic concepts of the application in a schematic manner, and the illustrations only show the components related to the application, not the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

The embodiments of the present application are further described below with reference to fig. 1-5.

Embodiment one:

the utility model provides a seat sensor, includes sensor body and epi conductive electrode, and epi conductive electrode and sensor body separate set up and pass through the wire connection, and epi conductive electrode's shape, thickness, size are adjusted according to the seat ring appearance adaptation, and epi conductive electrode installs in the seat ring and is close to the lower surface of seat ring. The sensor body is a second sensor body. The heating wire is positioned in the seat ring, and the heating wire is positioned in the seat ring. The coil is provided with a wire outlet hole, and the wire outlet hole is provided with at least two groups of wires, wherein one group is a positive and negative power wire of the DC power supply heating wire, and the other group isLanding sensorIs provided.

The second sensor body is placed inside the host body, outside the seat ring. The second conductive films (usually aluminum films) of the heating wires and the fixed seat ring heating wires are used as epitaxial electrodes of the sensor, and the second conductive films (usually aluminum films) of the heating wires and the fixed seat ring heating wires are conducted and connected through conductive wire rods, so that the complex design structure of the non-conductor seat ring is eliminated, and the assembly difficulty is reduced. The lead wire that switches on with the sensor passes through the product body that a foraminiferous axis of rotation of side seat got into, can directly replace the sensor bad that takes place at production or after-sale stage, need not scrap the nonconductor material seat circle, has also reduced the material that the production operation caused and has scrapped the risk when improving product after-sale maintenance convenience.

As shown in fig. 1 and 3, if the positive power line of the heating wire is disconnected, the negative power line has a grounding effect, a larger C3 value is generated, and the product generates noise due to the alternating current. In addition, the highest capacitance value when nothing is touched and the lowest capacitance value when one hand is touched have little difference, so it is difficult to accurately judge whether or not triggered. Fig. 3 shows the detected capacitance change. The capacitance change test results were measured without contact, with one hand in contact, with both hands in contact, and again without contact.

In practice, the capacitance change when the triggering object (person or other object) contacts the non-conductive material race is C2. However, the ratio of capacitance change detected by the sensor is reduced due to the presence of C1 and C3.

In the case of C1, a small capacitance change will reduce the overall capacitance change amplitude for the series reason. Therefore, the length of the conductive wire rod connecting the second conductive film and the second sensor body is shortened as much as possible, and the conductive wire rod is directly conducted with the conductive wire rod through the surface coating of the second conductive film, so that the conductive wire rod can directly contact the second conductive film, and the capacitance value of C1 is removed.

In the case of C3, since the total area of the conductive heating wire is large, the capacitance value thereof is relatively large. The main control program realizes the accurate temperature control of the heating wire in a repeated power-on and power-off mode, and indirectly realizes the accurate control of the surface temperature of the non-conductor material seat ring through heat conduction, so that the capacitance value difference between the power-on state and the non-power-on state is large, and the overall capacitance value judgment is greatly negatively influenced.

As shown in fig. 2 and 4, the heating wire is connected with a positive power line and a negative power line, and the negative power line is also connected with a diode in series. In fig. 4, a sufficient change in capacitance is detected whether the heater wire is using an AC power source (e.g., AC220V or other voltage) or a DC power source (e.g., DC12V or other voltage).

The equivalent capacitance when the conductive film contacts the seat ring is C2, the equivalent capacitance between the conductive film and the heating wire is C3, the equivalent capacitance between the sensor main body and the conductive film is C3, and the total rated capacity is determined as follows:

preferably, the conductive film is copper foil or aluminum foil.

The second sensor body, the capacitance can be expressed as follows

C＝(ε×S)/d

(C: rated capacity; ε: dielectric constant of material; S: sensing area; d: thickness, i.e. distance between sensing surface and sensed body).

The dielectric constant (epsilon) is determined by the material of the non-conductive material race; the sensing area (S) refers to the area of a sensing polar plate which is contacted with a trigger body (a human body or other objects) on the non-conductor material seat ring and the sensor; thickness (d) is the thickness of the material on the non-conductive material collar. Taking the same product as assembled as an example, the dielectric constant and the thickness of the material are not changed, and it can be considered that the capacitance difference between when the trigger object (human or other object) is effectively triggered and when the trigger object is not triggered is determined by the sensing area (S).

In the prior art, the first sensor body used on the non-conductor material seat ring has the defects that the area (S) of the sensing plate of the sensor is very small, so that the relatively large electrostatic capacity change is difficult to generate, and the triggering body (human body or other objects) is required to be contacted with the position of the sensing plate of the sensor to trigger.

According to the scheme, the effective induction surface covering the whole non-conductor material seat ring is obtained through conduction with the conductive film, and the induction surface can generate larger capacitance change due to larger area, so that accurate detection can be performed.

Embodiment two:

based on the first embodiment, the following provides a sensing method, which uses the above-mentioned sitting sensor to sense the touch of the human body. The sensor main body is arranged outside the seat ring, the conductive films made of conductive materials of the heating wires and the heating wires of the fixed seat ring are used as epitaxial electrodes of the sensor main body, and the heating wires and the conductive films are conducted and connected through a wire.

Finally, referring to fig. 5, in other embodiments, the second conductive film may be shaped to accommodate different applications.

The foregoing embodiments are merely illustrative of the principles of the present application and their effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A landing sensor, characterized in that: the sensor comprises a sensor body and an epitaxial conductive electrode, wherein the epitaxial conductive electrode and the sensor body are separately arranged and connected through a wire, the shape, thickness and size of the epitaxial conductive electrode are adjusted according to the shape of a seat ring, and the epitaxial conductive electrode is arranged in the seat ring and is close to the lower surface of the seat ring.

2. The footprint sensor of claim 1 in which: the heating wire is positioned in the seat ring, and the heating wire is positioned in the seat ring;

or a race of conductive material: the method is characterized in that the conductive material is fixedly arranged on the surface or inside of the non-conductive material seat ring through spraying/embedding/pasting/structure.

3. The footprint sensor of claim 2 in which: the heating wire powered by the DC power supply is connected with an anode power line and a cathode power line, and the cathode power line is also connected with a diode in series;

alternatively, a similar process is performed on the heating wire powered by the AC power source.

4. A footprint sensor according to claim 3, wherein: the seat ring is provided with a wire outlet hole, and the wire outlet hole is provided with at least two groups of wires, namely a group of heating wire power wires and a group of wires of the seat sensor.

5. The footprint sensor of claim 1 in which: the equivalent capacitance of the conductive film and the seat ring is C2 when the conductive film and the seat ring are in contact, the equivalent capacitance between the conductive film and the heating wire is C3, the equivalent capacitance between the sensor main body and the conductive film is C3, and the total rated capacity is determined as follows:

。

6. the footprint sensor of claim 2 in which: the conductive film adopts copper foil or aluminum foil.

7. An induction method, characterized in that: sensing a human touch with the landing sensor according to any one of claims 1-6.

8. The sensing method of claim 7, wherein: the sensor main body is arranged outside the seat ring, the conductive films made of conductive materials of the heating wires and the heating wires of the fixed seat ring are used as epitaxial electrodes of the sensor main body, and the heating wires and the conductive films are conducted and connected through a wire.