CN218818469U

CN218818469U - PSD-based water outlet device

Info

Publication number: CN218818469U
Application number: CN202222452278.5U
Authority: CN
Inventors: 苏文坤; 胡杰强; 沈志华; 卢伟
Original assignee: Zhangzhou Solex Smart Home Co Ltd
Current assignee: Zhangzhou Solex Smart Home Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-04-07
Anticipated expiration: 2032-09-16

Abstract

The utility model discloses a play water installation based on PSD, include: the device comprises a main control module, an infrared emission module, a PSD induction module, a signal amplification module and a driving module; the PSD induction module comprises a first lens, a second lens and a PSD sensor; the first lens and the second lens are arranged on the same horizontal plane, and the PSD sensor is arranged behind the second lens; the infrared emission module is connected with the main control module; the first lens is connected with the infrared emission module through a light path to receive infrared signals, and the second lens receives the infrared signals reflected by the induction object and focuses the infrared signals to the PSD sensor; the PSD sensor is connected with the signal amplification module; the main control module is connected with the signal amplification module to control the driving module to drive the water outlet device to discharge water according to the received electric signal. The utility model discloses can be suitable for different mounted position and mounting means to can reduce the influence of colour difference to the response distance.

Description

Water outlet device based on PSD

Technical Field

The utility model relates to an auto-induction technical field, especially a play water installation based on PSD.

Background

The infrared induction water outlet device commonly available on the market at present has the following pain points:

the infrared technology used by the existing infrared induction window is greatly influenced by the color and the roughness of a shielding object;

the induction distance is different due to the color difference of hands/human skin;

partial play water installation design response surface is downward, meets smooth surface response distances such as stainless steel and increases and leads to appearing the auto-induction, causes the water waste.

The PSD is a position sensing device based on the transverse photoelectric effect. The position of the light spot on the photosensitive surface can be converted into an electrical signal. The sensing device capable of measuring the position is designed based on the PSD, and the result of the position measurement is independent of the incident light intensity, so that the influence of color difference on the sensing distance can be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a play water installation based on PSD can be suitable for different mounted position and mounting means to can reduce the influence of colour difference to the inductive distance.

The utility model adopts the following technical scheme:

a PSD-based water outlet apparatus comprising: the device comprises a main control module, an infrared emission module, a PSD induction module, a signal amplification module and a driving module; the PSD induction module comprises a first lens, a second lens and a PSD sensor; the first lens and the second lens are arranged on the same horizontal plane, and the PSD sensor is arranged behind the second lens; the infrared emission module is connected with the main control module; the first lens is connected with the infrared emission module through a light path to receive infrared signals, and the second lens receives the infrared signals reflected by the induction object and focuses the infrared signals to the PSD sensor; the PSD sensor is connected with the signal amplification module; the main control module is connected with the signal amplification module to control the driving module to drive the water outlet device to discharge water according to the received electric signal.

Preferably, the distance from the center of the first lens to the center of the second lens is set to make the position where the infrared signal reflected by the white sensing object is focused on the PSD sensor be a central position.

Preferably, the signal amplification module comprises a subtractor and an amplifier; a first current output end of the PSD sensor is connected with a homodromous input end of the subtracter through a first voltage-dividing resistor, and a second current output end of the PSD sensor is connected with a reverse input end of the subtracter through a second voltage-dividing resistor; the output end of the subtracter is connected with the non-inverting input end of the amplifier; the output end of the amplifier is connected with the main control module.

Preferably, a positive power supply end of the subtractor is connected with a power supply output end of the main control module, and a negative power supply end of the subtractor is grounded; and the positive power supply end of the amplifier is connected with the power output end of the main control module, and the negative power supply end of the subtracter is grounded.

Preferably, the signal amplification module further includes: a first high pass filter and a second high pass filter; the first high-pass filter is arranged between the first divider resistor and the equidirectional input end of the subtracter; the second high-pass filter is arranged between the second voltage-dividing resistor and the inverting input of the subtractor.

Preferably, the PSD-based water outlet device further comprises a power supply module; the power supply module is connected with the main control module to supply power.

Preferably, the power supply module comprises a battery.

Preferably, the PSD-based water outlet device further comprises an LDO voltage regulation module; the LDO voltage stabilizing module is connected with the power supply module and the main control module respectively.

Preferably, the spectral response range of the PSD sensor is 760 nm to 1100nm.

Preferably, the first lens and the second lens are plano-convex lenses.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) The utility model discloses a play water installation based on PSD, include: the device comprises a main control module, an infrared emission module, a PSD induction module, a signal amplification module and a driving module; two paths of current signals output by the PSD sensor are connected with the signal amplification module, and the main control module is connected with the signal amplification module to control the driving module to drive the water outlet device to discharge water according to the received electric signals, so that the method is simple to realize, can be suitable for different installation positions and installation modes, and can reduce the influence of color difference on the sensing distance;

(2) The PSD-based water outlet device of the utility model is characterized in that the PSD induction module comprises a first lens, a second lens and a PSD sensor, wherein the first lens has the effect of dispersing light, the induction area is increased, the second lens has the light condensation effect, and the power consumption is reduced by reducing the power of infrared emission through light condensation; the first lens firstly gathers the light of the infrared emission module and then diverges the light;

(3) The utility model discloses a water outlet device based on PSD, the distance of the center of first lens to the center of second lens sets up to make the infrared signal that white response object reflection focus on the position of PSD sensor is central position, under the prerequisite that need not calculate the distance between response object and the infrared emission module, further solves the problem that the difference of sensing distance is caused to the difference of people's hand/human colour difference;

(4) The utility model discloses a water installation based on PSD, power module adopt the battery, can be applicable to different installation environment on the one hand, on the other hand adopts single power supply design in the aspect of signal processing, can ensure that the signal can not distort.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following description lists specific embodiments of the present invention.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a PSD-based water outlet apparatus in an embodiment of the present invention;

fig. 2 is a schematic reflection diagram of a PSD sensing module according to an embodiment of the present invention;

FIG. 3 is a prior art PSD model sensing diagram;

fig. 4 is a circuit diagram of a main control module according to an embodiment of the present invention;

fig. 5 is a circuit diagram of the power supply module and the LDO regulator module according to the embodiment of the present invention;

fig. 6 is a circuit diagram of an infrared emission module according to an embodiment of the present invention;

fig. 7 is a circuit diagram of a PSD sensing module and a signal amplifying module according to an embodiment of the present invention;

fig. 8 is a circuit diagram of a driving module according to an embodiment of the present invention;

fig. 9 is a schematic use view of the water outlet device according to the embodiment of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.

Referring to fig. 1 and fig. 2, the utility model relates to a water outlet device based on PSD, include: the system comprises a main control module 10, an infrared emission module 20, a PSD induction module 30, a signal amplification module 40 and a driving module 50; the PSD sensing module 30 includes a first lens 301, a second lens 302 and a PSD sensor 303; the first lens 301 and the second lens 302 are disposed on the same horizontal plane, and the PSD sensor 303 is disposed behind the second lens 302; the infrared emission module 20 is connected with the main control module 10; the first lens 301 is connected with the infrared emission module 20 through an optical path to receive an infrared signal, and the second lens 302 receives an infrared signal reflected by an induction object and focuses the infrared signal on the PSD sensor 303; the PSD sensor 303 is connected to the signal amplification module 40; the main control module 10 is connected with the signal amplification module 40 to control the driving module 50 to drive the water outlet device to discharge water according to the received electric signal.

Specifically, the infrared emission module 20 is connected to the main control module 10, and configured to emit and emit an infrared signal according to a preset emission period (e.g., every 250 ms) according to a control signal emitted by the main control module 10; the first lens 301 is connected with the infrared emission module 20 through an optical path to receive the infrared signal; when no sensing object reflects an infrared signal to the second lens 302, both current ends of the PSD sensor 303 output 0, the main control module 10 determines that no sensing object exists according to the electrical signal, and does not control the driving module 50 to act, when a sensing object enters a sensing area like a hand, the sensing object reflects the infrared signal to the second lens 302, the second lens 302 receives the infrared signal reflected by the sensing object and focuses the infrared signal on the PSD sensor 303 (the distance from the second lens 302 to the PSD sensor 303 is set as the focal length of the second lens 302), both current ends of the PSD sensor 303 output current, the signal amplification module 40 converts the two currents into voltage signals and amplifies the voltage signals and then sends the voltage signals to the main control module 10, the main control module 10 determines that a sensing object exists according to the electrical signal, controls the driving module 50 to act, and the driving module 50 drives the water outlet device to discharge water.

In this embodiment, the first lens 301 and the second lens 302 are plano-convex lenses. The first lens 301 has a light diverging effect to increase a sensing area, and the second lens 302 has a light converging effect to reduce power generated by infrared rays by converging light to reduce power consumption.

Before the water outlet device is installed and used, a distance b from the center of the first lens 301 to the center of the second lens 302 needs to be adjusted, and specifically, the distance b from the center of the first lens 301 to the center of the second lens 302 is set to make the position where the infrared signal reflected by the white sensing object is focused on the PSD sensor 303 be a central position.

Referring to fig. 2, the absorption of light is different for different colors, and the color with the most serious light absorption is black (dark object), the sensing distance for white (light object) is AP, and the sensing distance for black (dark object) is AP'. In order to reduce the influence of color difference on the distance, the distance that the black object can sense is taken as a reference in the present embodiment, and after determining the model of the lens used and the power of the infrared emission module 20, the distance of the black object can be determined. Since the sensing distance of the white object is relatively strong, it is necessary to reduce the sensing distance of the white object, and it is known from the PSD model (see fig. 3, prior art) that induced currents I1 and I2 are generated at the position of incident light, and the direct black-and-white color sensing distance can be reduced by using the difference method (I1-I2), but the white object sensing distance is far from the black object sensing distance.

The reason that the sensing distance of the black object is close is that the light intensity signal received by the PSD sensor 303 is insufficient, the induced current generated by reflecting the white object is adjusted to I1-I2=0, so that the incident light approaches the central point of the PSD sensor 303, and then the difference is performed to further reduce the distance of the white object, so that the black object maintains the original distance, and thus the black and white distance approach can be achieved.

Referring to fig. 4, in this embodiment, the main control module 10 may use a chip PIC16LF1709 including dual operational amplifiers. It should be noted that in other embodiments, other types of processing chips may also be used, which is specifically selected according to needs, and this embodiment is not limited.

Referring to fig. 1, the PSD-based water outlet apparatus further includes a power supply module 60; the power supply module 60 is connected with the main control module 10 to supply power. In this embodiment, the power supply module 60 is preferably a battery.

The power supply module 60 is a battery, which can be applied to different installation environments, and on the other hand, a single power supply design is adopted in signal processing, which can ensure that signals are not distorted.

As the battery is used, the voltage output by the battery may be unstable, and the power supply module 60 needs to be regulated to ensure the normal operation of the main control module 10 and other modules. Specifically, the PSD-based water outlet apparatus further includes an LDO regulator module 70; the LDO regulator module 70 is connected to the power supply module 60 for voltage regulation, and the LDO regulator module 70 is connected to the main control module 10 for providing the regulated power to the main control module 10 and other modules. The circuit diagrams of power supply module 60 and LDO regulator module 70 of the present embodiment are shown in fig. 5.

Referring to fig. 6, a circuit diagram of the infrared emitting module 20 of the present embodiment is shown. Specifically, the main control module 10 sends a signal through a TR-TX2 port to control the infrared transmitting module 20 to transmit an infrared signal to the outside.

Referring to fig. 7, the signal amplifying module 40 includes a subtractor and an amplifier; a first current output end of the PSD sensor 303 is connected to a homodromous input end of the subtractor through a first voltage-dividing resistor, and a second current output end of the PSD sensor 303 is connected to a reverse input end of the subtractor through a second voltage-dividing resistor; the output end of the subtracter is connected with the non-inverting input end of the amplifier; the output end of the amplifier is connected with the main control module 10.

The positive power supply end of the subtracter is connected with the power supply output end of the main control module 10, and the negative power supply end of the subtracter is grounded; the positive power end of the amplifier is connected with the power output end of the main control module 10, and the negative power end of the subtracter is grounded.

The signal amplifying module 40 further includes: a first high pass filter and a second high pass filter; the first high-pass filter is arranged between the first divider resistor and the equidirectional input end of the subtracter; the second high-pass filter is arranged between the second voltage-dividing resistor and the inverting input of the subtractor.

In fig. 7, U4 is a PSD sensor 303, which can convert an optical signal into a current signal, and the PSD sensor 303 of the present invention adopts a receiving spectrum in a frequency band of 760 to 1100nm, which can directly receive an infrared spectrum to reduce a filter design, thereby simplifying a circuit. When an infrared signal is reflected onto the PSD sensor 303, the 1 pin and the 3 pin of U4 generate currents I1 and I2 of a magnitude corresponding to the irradiation position. The first voltage dividing resistor R24 and the second voltage dividing resistor R26 are pull-down resistors to ground, and can directly convert the current signal generated by the PSD sensor 303 into a voltage signal, so as to generate a first voltage U1= I1 × R24 and a second voltage U2= I2 × R26. The capacitor C10 and the resistor R19 form a first RC high-pass filter, and the capacitor C11 and the resistor R17 form a second RC high-pass filter. If the emission setting is one infrared emission time of 250ms, the emission frequency is 4Hz, the filtering frequency of the second RC high-pass filter is set to be lower than 4Hz, the frequency F = 1/(2 pi x R17 x C11), and the first RC high-pass filter is the same.

The operational amplifier A, the resistors R16, R23, R25 and R2 form a subtracter, and the output amplification factor A = R2/R16-R25/R23. Since the 3.3v signal is amplified to cause waveform distortion of the voltage signal, it is directly subtracted and then amplified.

The resistor R14 and the capacitor C4 form a high-pass filter, the resistors R13, R15 and the operational amplifier B form a homodromous amplifier, and the input voltage signal is amplified by a certain multiple, wherein the resistors R13 and R15 are divider resistors, and the amplification factor B = (R13 + R15)/R15.

Two paths of signals of the PSD sensor 303 are processed by a subtracter and an amplifier and then output to the main control module 10, and subtraction operation and amplification operation are carried out based on hardware so as to solve the problems of small single operational amplifier gain, serious delay of the main control module 10 and ADC sampling precision error. In addition, in order to ensure that the signals are all in the forward direction, the subtracter and the amplifier both use the same-direction amplifier, and do not need to perform other signal direction processing, so that the method is suitable for occasions powered by batteries.

Referring to fig. 8, a circuit diagram of the driving module 50 of the present embodiment is shown. When the main control module 10 determines that there is an object to be sensed according to the output OUTB of the amplifier, the driving module 50 is controlled to operate, and the driving module 50 drives the water outlet device to discharge water.

In this embodiment, the water outlet device includes a faucet, a shower head, a toilet, or the like. Fig. 9 is a schematic view showing the use of the water outlet device as a faucet.

The foregoing is only a preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the protection scope of the present invention by replacing or changing the technical solution and the modified concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a water discharging device based on PSD which characterized in that includes: the device comprises a main control module, an infrared emission module, a PSD induction module, a signal amplification module and a driving module; the PSD induction module comprises a first lens, a second lens and a PSD sensor; the first lens and the second lens are arranged on the same horizontal plane, and the PSD sensor is arranged behind the second lens; the infrared emission module is connected with the main control module; the first lens is connected with the infrared emission module through a light path to receive infrared signals, and the second lens receives the infrared signals reflected by the induction object and focuses the infrared signals to the PSD sensor; the PSD sensor is connected with the signal amplification module; the main control module is connected with the signal amplification module to control the driving module to drive the water outlet device to discharge water according to the received electric signal.

2. The PSD-based water outlet device according to claim 1, wherein a distance from a center of the first lens to a center of the second lens is set to a center position of an infrared signal reflected by a white sensing object focused on the PSD sensor.

3. The PSD-based water outlet device according to claim 1, wherein the signal amplification module comprises a subtractor and an amplifier; a first current output end of the PSD sensor is connected with a homodromous input end of the subtracter through a first divider resistor, and a second current output end of the PSD sensor is connected with a reverse input end of the subtracter through a second divider resistor; the output end of the subtracter is connected with the non-inverting input end of the amplifier; the output end of the amplifier is connected with the main control module.

4. The PSD-based water outlet device according to claim 3, wherein a positive power supply end of the subtractor is connected to a power output end of the main control module, and a negative power supply end of the subtractor is grounded; and the positive power supply end of the amplifier is connected with the power output end of the main control module, and the negative power supply end of the subtracter is grounded.

5. The PSD-based water outlet device according to claim 3, wherein the signal amplification module further comprises: a first high pass filter and a second high pass filter; the first high-pass filter is arranged between the first divider resistor and the equidirectional input end of the subtracter; the second high-pass filter is provided between the second voltage-dividing resistor and the inverting input terminal of the subtractor.

6. The PSD-based water outlet device according to claim 1, further comprising a power supply module; the power supply module is connected with the main control module to supply power.

7. The PSD-based water outlet device according to claim 6, wherein the power module comprises a battery.

8. The PSD-based water outlet device according to claim 6, further comprising an LDO regulator module; the LDO voltage stabilizing module is connected with the power supply module and the main control module respectively.

9. The PSD-based water outlet device according to claim 1, wherein the spectral response range of the PSD sensor is 760 nm to 1100nm.

10. The PSD-based water outlet device according to claim 1, wherein the first lens and the second lens are plano-convex lenses.