CN115120872B - Rolling type personal care equipment and radio frequency output control method thereof - Google Patents
Rolling type personal care equipment and radio frequency output control method thereof Download PDFInfo
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- CN115120872B CN115120872B CN202210727900.0A CN202210727900A CN115120872B CN 115120872 B CN115120872 B CN 115120872B CN 202210727900 A CN202210727900 A CN 202210727900A CN 115120872 B CN115120872 B CN 115120872B
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- A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
- A61N1/403—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals for thermotherapy, e.g. hyperthermia
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- A—HUMAN NECESSITIES
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Abstract
The invention discloses a rolling type personal care equipment and a radio frequency output control method thereof, wherein the method comprises the following steps: when the rolling part of the personal care equipment is in rolling use in contact with the body surface, the continuous contact time ts between the contact surface of the rolling part which is in contact with the body surface and the body surface is obtained; and controlling the radio frequency output power P to change in a negative correlation with the continuous contact time ts according to the continuous contact time ts, wherein the negative correlation coefficient r1 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is larger than the negative correlation coefficient r2 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is smaller. The combination of the radio frequency output power P and the continuous contact time ts ensures that the use risk of overheat and scald cannot occur between the abutting surface and the body surface, so that the use safety can be ensured, and the larger radio frequency output power P can be controlled to be output so as to achieve an obvious radio frequency skin care effect on the body surface.
Description
Technical Field
The invention relates to the technical field of radio frequency control, in particular to rolling type personal care equipment and a radio frequency output control method thereof.
Background
The radio frequency technology is applied to personal care equipment such as massage, beauty treatment and the like, and can emit electromagnetic waves to reach subcutaneous tissue when working, so that the natural resistance movement of the subcutaneous tissue generates heat energy, and the dermis collagen fiber can immediately shrink and stimulate the dermis layer to generate new collagen fiber when the temperature is 55-70 ℃. The higher the radio frequency output power is in the safety range, the easier the electromagnetic wave is to penetrate into subcutaneous tissue to generate higher heat energy, so that the better the skin care effect is. However, the larger the rf output power is, the higher the magnetic field energy intensity at the position closest to the rf electrode is, so that the skin surface is easy to be overheated and scalded.
In the existing like products, most of the temperature sensors are used for sensing the temperature of the contact position of the equipment and the skin, the radio frequency power is adjusted according to the temperature, and the radio frequency output power is difficult to adjust in time due to the hysteresis of the temperature of the skin surface layer detected by the temperature sensors, so that a certain scalding risk still exists.
The similar products do not depend on a temperature sensor, and lower radio frequency output power or intermittent radio frequency output is directly adopted, so that the risk of scalding the skin surface layer is reduced, but the skin care effect is not obvious due to the lower radio frequency output power. The product is additionally provided with a cooling radiating element on the contact surface of the product and the skin surface to cool the skin surface so as to reduce the risk of scalding caused by heating and overheating of the skin surface, but the whole structure is complex and the risk of scalding cannot be fundamentally prevented.
Disclosure of Invention
The invention provides rolling type personal care equipment and a radio frequency output control method thereof, and aims to solve the technical problems that the radio frequency power output is difficult to meet the requirements of preventing skin scald and achieving obvious skin care effects in the prior art.
The invention discloses a radio frequency output control method of rolling personal care equipment, which comprises the following steps:
step S2, when the rolling part of the personal care equipment is abutted against the body surface for rolling use, the continuous contact time ts between the abutting surface of the rolling part which is currently abutted against the body surface and the body surface is obtained;
and step S3, controlling the radio frequency output power P to change in a negative correlation manner with the continuous contact time ts according to the continuous contact time ts, wherein the negative correlation coefficient r1 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is larger than the negative correlation coefficient r2 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is smaller.
In a preferred embodiment, step S2 specifically includes:
step S21, acquiring the current real-time rotating speed V of the rolling part, and determining a proportionality coefficient a of the current abutting surface to the proportion of the circumferential surface of the rolling part;
s22, calculating and determining the continuous contact time ts by using a formula a.C/V according to the real-time rotating speed V and the proportionality coefficient a;
wherein C represents the circumferential perimeter of the cross section of the rolling portion.
In a preferred embodiment, the step of determining the scaling factor a in step S21 includes:
analyzing and determining the acceleration of the real-time rotating speed V;
and determining the proportionality coefficient a in a preset range by adopting the characteristic that the acceleration of the real-time rotating speed V changes in positive correlation.
In a preferred embodiment, the step of determining the scaling factor a in step S21 includes:
acquiring pressure data currently representing the contact degree characteristics of the rolling part and the body surface;
the corresponding scaling factor a can be determined by using a preset pressure-abutment linear equation.
In a preferred embodiment, the determination of the preset pressure-abutment linear equation comprises the steps of:
setting a pressure sensor for representing the contact degree characteristic of the rolling part and the body surface;
corresponding proportional coefficients a under different pressure data are measured in advance, and a pressure-abutting linear equation is formed by fitting the different pressure data and the corresponding proportional coefficients a.
In a preferred embodiment, step S3 includes:
if the current continuous contact time ts is in a preset first range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset first negative correlation coefficient;
if the current continuous contact time ts is in the preset second range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset second negative correlation coefficient;
if the current continuous contact time ts is in the preset third range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset third negative correlation coefficient;
wherein the first range > the second range > the third range, the first negative correlation coefficient > the second negative correlation coefficient > the third negative correlation coefficient, the radio frequency output power when the continuous contact time ts is in the first range < the radio frequency output power when the continuous contact time ts is in the second range < the radio frequency output power when the continuous contact time ts is in the third range.
In a preferred embodiment, step S3 further includes:
if the current continuous contact time ts is greater than a preset first range, controlling the radio frequency output power P to output at a preset first constant power P1, wherein the first constant power P is less than or equal to the radio frequency output power when the continuous contact time ts is in the first range;
or/and, if the current continuous contact time ts is smaller than the preset first range, controlling the radio frequency output power P to output at a preset second constant power P2, wherein the second constant power P is larger than or equal to the radio frequency output power when the continuous contact time ts is in the third range.
In a preferred embodiment, step S2 further comprises, before: and judging whether the rolling part of the personal care equipment is abutted against the body surface.
The invention also discloses rolling type personal care equipment, which comprises an equipment body with a holding part, at least one rolling part, a radio frequency module, a rotating speed detection device and a control circuit board; the control circuit board adopts the radio frequency output control method to control the radio frequency module.
In a preferred embodiment, the rotation speed detecting device includes:
the light reflecting parts are uniformly distributed on the circumferential surface of the rolling part;
and the control circuit board determines the real-time rotating speed V of the rolling part according to the waveform characteristics of the light intensity current signals output by the photoelectric sensor.
Compared with the prior art, the invention has the following beneficial effects:
when the rolling part is abutted against the body surface for rolling, the continuous contact time ts of the current abutting surface of the rolling part and the body surface is determined together according to the current real-time rotating speed V of the rolling part and the proportionality coefficient a of the current abutting surface of the rolling part and the body surface to the proportion of the circumferential surface of the rolling part, and the radio frequency output power P is controlled by the characteristic that the radio frequency output power P and the continuous contact time ts are in negative correlation; and the RF output power P and the continuous contact time ts are controlled to be in negative correlation change, and the RF output power P and the continuous contact time ts are combined to ensure that the use risk of overheat and scald cannot occur between the abutting surface and the body surface, so that the use safety can be ensured, and the RF output power P with larger output can be controlled to achieve an obvious RF skin care effect on the body surface.
Drawings
Fig. 1 is a schematic perspective view of one embodiment of a rolling personal care apparatus.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a flow chart of an embodiment of a radio frequency output control method.
Fig. 4 is a schematic view showing a use state in which the rolling part is rolled against the body surface.
Description of the embodiments
In order to further describe the technical means and effects adopted by the present application to achieve the preset purpose, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the present application with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
The rolling type personal care equipment can be expressed as rolling type massage devices, rolling type physiotherapy devices, rolling type beauty devices and other products in specific products.
As shown in fig. 1 and 2, the rolling personal care apparatus disclosed in this embodiment includes an apparatus body 1, at least one rolling part 3, a radio frequency module 6, a rotation speed detecting device, and a control circuit board; a shaft part 2 is fixedly connected between two opposite ends of the equipment body 1, and the rolling part 3 is rotatably sleeved on the shaft part 2 so that the rolling part 3 can rotate around the shaft part 2 when being abutted against the body surface; the rotating speed detection device is used for detecting the rotating speed V when the rolling part 3 is abutted against the body surface for rolling; the control circuit board is electrically connected with the radio frequency module 6 and the rotation speed detection device, and is used for controlling the radio frequency output power of the radio frequency module 6 according to the rotation speed V.
It will be understood that, since the rotation speed V is the rotation speed when the rolling portion 3 rolls against the body surface, when the rotation speed V is greater, it indicates that the rolling portion 3 rolls at a higher speed on the body surface, and also indicates that the rolling portion 3 contacts with the body surface at any position, and the contact time with the rolling portion 3 is shorter.
The device body 1 includes a grip 11, and the grip 11 may be in the form of a stick or a bar, or may be in the form of a grip 10 as shown in the drawings, so that fingers can pass through the grip 10 to grip the device. When the device is used, the rolling part 3 is abutted against the body surface by the hand-held holding part 11 to roll, physical massage is provided in the rolling process of the rolling part 3 on the body surface, and the radio frequency output power of the radio frequency module 6 is controlled to generate electromagnetic waves to provide skin care physiotherapy for the skin.
A spacer 12 is provided between the grip 11 and the shaft 2, so that the grip 11 and the rolling part 3 are physically separated by the spacer 12, and the rolling part 3 is prevented from being rolled due to touching and blocking of the rolling part 3 when the grip 11 is held by a hand during use.
The rolling part 3 is usually represented in the actual product as a roller or a wheel, such as a massage roller, a massage wheel. The rolling part 3 may be directly fitted over the shaft part 2 or may be connected to the shaft part 2 via a bearing 4.
The control circuit board is disposed in the isolation portion 12 to protect the control circuit board. Since the control circuit board mainly controls the rf output power of the rf module 6 according to the rotation speed V. Therefore, the detection precision and accuracy of the rotating speed V are preconditions for realizing the precise control of the radio frequency output power.
In one embodiment, the rotation speed detection device includes: n light reflecting portions 5 uniformly distributed on a circumferential surface of the rolling portion 3 around the shaft portion 2; the photoelectric sensor detects the reflected light generated by the reflecting part 5, outputs a light intensity current signal matched with the light intensity of the reflected light to the control circuit board, and the control circuit board determines the real-time rotating speed V of the rolling part 3 according to the waveform characteristics of the light intensity current signal. N is a natural number greater than 2, preferably greater than 5. The main purpose of the N light reflecting parts 5 is to accurately detect the rotating speed V to 1/N circle, which is beneficial to improving the detection precision.
For example, the rolling portion 3 is provided with N recesses 31 uniformly around the circumferential surface of the shaft portion 2, a partition portion 32 is provided between any two adjacent recesses 31, and one light reflecting portion 5 is provided in each of the recesses 31. The light reflecting portion 5 is typically represented by a light reflecting film or a flexible light reflecting sheet. Taking a reflective film as an example, the reflective film is plated in each concave portion 31 by vacuum sputtering or electroplating. Of course, the reflective film may be fixed in the recess 31 by adhesion, hot melt, or the like.
Wherein a light-transmitting groove 13 is provided on a side of the spacer 12 facing the shaft portion 2, and the photoelectric sensor is provided in the light-transmitting groove 13. The design can protect the photoelectric sensor from being influenced by the ambient light except the reflected light generated by the reflecting part 5, thereby being beneficial to resisting interference and improving detection accuracy.
The recess 31 may have any shape. For example, the concave portion 31 has a concave arc shape, and the light reflecting portion 5 covers the concave arc surface of the concave portion 31, that is, the outer shape of the light reflecting portion 5 also exhibits a concave arc shape. In the rotation process of the rolling part 3, the different angles of the reflected light generated by different parts of the reflecting part 5 cause different light intensities of the reflected light, and the current signals correspondingly output by the photoelectric sensor show a waveform characteristic that the current signals gradually increase from small to small and then gradually decrease; a singlechip is usually arranged on the circuit board, an A/D interface of the singlechip is utilized to collect current signals output by the photoelectric sensor, and each detection result is identified according to waveform characteristics of the current signals.
For another example, the concave portion 31 is a flat strip, and the light reflecting portion 5 is correspondingly attached to the bottom of the concave portion 31 in a flat strip. At this time, when one of the reflective parts 5 is aligned with the photoelectric sensor during the rotation of the rolling part 3, the light emitted from the light source of the photoelectric sensor just strikes the reflective part 5, and the photoelectric sensor can detect a stronger reflected light; as the rolling part 3 continues to rotate, when the partition part 32 is aligned with the photoelectric sensor, the photoelectric sensor can detect a weaker reflected light or the root pressing does not detect the reflected light, so as to determine a light intensity current signal output by the photoelectric sensor, the waveform of the light intensity current signal is a square wave signal or an approximate square wave signal, and the circuit board can identify each detection result by utilizing the waveform characteristic.
For example, N is 12, which indicates that the detection accuracy of the rotation of the rolling portion 3 is 1/12 turn. If 30 detection results are collected and identified by the circuit board in unit time, it is indicated that the rolling part 3 rotates 2.5 circles in unit time, that is, the rotation speed V is 2.5 circles per unit time.
The radio frequency module 6 comprises a radio frequency electrode, which may be arranged on the rolling part 3. When the number of the rolling parts 3 is one and the radio frequency electrode is also one, it is expressed as a monopolar radio frequency. In general, the number of the rolling parts 3 is 2 or more, and each rolling part 3 is provided with one radio-frequency electrode respectively to form bipolar radio-frequency or multipolar radio-frequency, and the radio-frequency electrodes are all positioned at the same interface for action, that is, all are in contact with the skin of the same body surface.
In connection with the embodiment shown in fig. 3, the method for controlling the rf output power of the rf module 6 by the circuit board includes the following steps:
step S1, judging whether the personal care apparatus is in a use state, namely judging whether the rolling part 3 of the personal care apparatus is abutted against a body surface.
There are various means for realizing this, for example, a set of detection electrodes 7 are provided on the rolling parts 3 at intervals (the rolling parts 3 are shown as including 2 rolling parts 3, one detection electrode 7 is provided on each rolling part 3), the detection electrodes 7 are electrically connected with the control circuit board, when the rolling parts 3 are not abutted against the body surface, the detection electrodes 7 are in a first electrical state, and when the rolling parts 3 are abutted against the body surface, the two detection electrodes 7 are conducted as electric conductors by the body surface to be in a second electrical state. The control circuit board can accurately judge whether the rolling part 3 is abutted against the body surface according to the electrical state represented by the detection electrode 7. Only when the rolling part 3 is abutted against the body surface, the personal care equipment is judged to be in a use state, and the rotation speed detection device is controlled to detect the real-time rotation speed V of the rolling part 3 and start the radio frequency module 6 to output radio frequency.
In step S2, when the rolling part 3 of the personal care apparatus is rolled and used in contact with a body surface (the body surface refers to the skin surface of the body), the continuous contact time ts between the contact surface of the rolling part 3 currently in contact with the body surface and the body surface is obtained.
As shown in fig. 4, the rolling portion 3 is shown in a rolling state in contact with the body surface Q. It will be appreciated that: firstly, the abutting surface is not to a certain fixed position or area of the rolling part 3, but is a circumferential surface of the rolling part 3 which can be contacted with the body surface Q, and each part of the circumferential surface can be continuously switched to be the abutting surface when the rolling part 3 abuts against the body surface Q in the rolling process; secondly, since the body surface Q is an elastic tissue, when the rolling part 3 is currently abutted against the body surface Q, the sizes of the corresponding abutting surfaces at different times are different and not fixed, for example, when the rolling part 3 rolls to the M position of the body surface, the force of pressing the body surface is large or the body surface tissue at the M position is soft, so that the rolling part 3 is sunk into the body surface Q deeply, and the cross-section arc length s of the abutting surfaces is relatively large; when rolling to the position N of the body surface, the rolling part 3 is sunk into the body surface Q to be shallow, and the cross-section arc length s' of the abutting surface is relatively small.
Taking the M position of scrolling to the body surface as an example: when the rolling part 3 rolls to the position M of the body surface at the real-time rotation speed V, the cross-section arc length s of the contact surface which is currently in contact with the body surface, and at this time, the duration ts of the contact between the contact surface and the body surface is actually the duration from the contact surface to the departure of the body surface when the rolling part 3 rolls for one circle at any position a on the contact surface of the rolling part 3. Thus, the duration of contact ts can be expressed as:
ts=s/v=a·c/V formula (1)
Where a is a proportionality coefficient, and the proportionality coefficient a is expressed as:
a=s/C (2)
C is the circumferential circumference of the cross section of the rolling part 3, so C is a known value or a definite finger. Therefore, the scaling factor a represents the current proportion of the abutment surface to the circumferential surface of the rolling portion 3. That is, a is a coefficient value between 0 and 1, and is generally smaller than 0.5. Therefore, the scaling factor a characterizes the degree of abutment of the rolling portion 3 against the body surface.
As can be seen from this, the continuous contact time ts of the rolling portion 3 at the M position of the body surface is not necessarily the same as the continuous contact time ts of the rolling portion 3 at the N position of the body surface because the scale factor a corresponding to the M position and the N position is different due to the different specifications of the contact surface, and the real-time rotation speeds V corresponding to the M position and the N position of the rolling portion 3 are not necessarily the same, so the continuous contact time ts is a dynamic value that varies with the rolling characteristics of the rolling portion 3 at the body surface.
The step S2 specifically comprises the following steps:
step S21, acquiring the current real-time rotation speed V of the rolling part 3, and determining the proportionality coefficient a of the current abutting surface to the proportion of the circumferential surface of the rolling part 3.
Wherein, as mentioned above, the control circuit board and the rotation speed detection device can be preferably adopted to realize high-precision real-time rotation speed V detection.
The scaling factor a is determined according to the theoretical basis of the formula (2). The present application presents two embodiments for relatively objective determination of the scaling factor a.
In a first embodiment:
because the personal care device needs to be held by a user to enable the rolling part 3 to be abutted against the body surface, the user can generate a push-pull force for the rolling part 3, and the rolling part 3 can generate accelerated rolling on the basis of overcoming the friction force between the rolling part 3 and the body surface.
Thus, the typical process of a user's hand-held personal care device rolling on a body surface can be broken down into three phases:
the first stage is the initial stage: at the initial stage of the contact of the rolling part 3 with the body surface, the user tends to press the rolling part 3 with a large force to start rolling on the body surface, and the large pressing force causes the contact degree of the rolling part 3 with the body surface to be deep, so that the corresponding scaling factor a is large, and at this time, the real-time rotational speed V of the rolling part 3 is small, but the real-time rotational speed V starts to increase with a large acceleration.
The second stage is the acceleration to maximum speed stage: with the further increase of the real-time rotation speed V of the rolling part 3, the force of the user pressing the rolling part 3 against the body surface is usually gradually reduced due to the very limited swing range and angle of the arm of the user, the acceleration of the real-time rotation speed V is gradually reduced until the acceleration reaches the maximum value of the real-time rotation speed V when the acceleration is 0, and the contact degree between the rolling part 3 and the body surface is gradually reduced, so that the corresponding proportionality coefficient a is also gradually smaller.
The third stage is a deceleration stage: in view of the fact that the limit of the swing range and angle of the arm of the user reaches the maximum, the real-time rotation speed V of the rolling part 3 is rapidly reduced and even stops rolling, so that the duration of the third stage is often very short, at this time, the force of the rolling part 3 pressing the body surface is gradually reduced and even completely disappeared, and the corresponding scaling factor a is gradually smaller and even reaches 0 (0 indicates that the rolling part 3 is not in contact with the body surface any more).
From the above analysis, the scaling factor a can be regarded as a characteristic that changes in a negative correlation with the trend of the real-time rotation speed V in the first and second stages. Therefore, the determination of the scaling factor a in step S21 specifically includes: analyzing and determining the acceleration of the real-time rotating speed V; and determining the proportionality coefficient a in a preset range by adopting the characteristic that the acceleration of the real-time rotating speed V changes in positive correlation.
Taking a preset range of the proportionality coefficient a of 0.05-0.1 as an example for illustration: determining a scaling factor a=0.09 at the initial stage; the proportional coefficient a=0.1 is determined when the acceleration of the real-time rotational speed V increases further at the initial stage, and then the acceleration (acceleration) of the real-time rotational speed V gradually decreases as the real-time rotational speed V increases, at this time, the proportional coefficient a changes positively in synchronization with the acceleration of the real-time rotational speed V from 0.1, that is, the proportional coefficient a decreases gradually from 0.1, and the proportional coefficient a=0.05 is determined correspondingly when the acceleration of the real-time rotational speed V is 0.
Second embodiment: a pressure sensor is provided on the personal care apparatus, which characterizes the degree of abutment of the rolling part 3 against the body surface, for example, the pressure sensor being provided between the grip part 11 or the rolling part 3 and the shaft part 2. The control circuit board collects pressure data of the pressure sensor to objectively determine a proportion coefficient a.
Specifically, the corresponding proportionality coefficient a under different pressure data is actually measured for a plurality of times in advance, and after the measurement data with larger deviation is deleted, the pressure data and the corresponding proportionality coefficient a are fitted into a pressure-abutting linear equation by using the measurement data. Therefore, the control circuit board can determine the corresponding proportionality coefficient a by utilizing a pressure-abutting linear equation determined by pre-fitting according to the currently acquired pressure data.
Step S22, calculating and determining the continuous contact time ts according to the real-time rotating speed V and the proportionality coefficient a by using the formula (1) a.C/V.
Therefore, in determining the continuous contact time ts, an objective control basis is provided for the control circuit board to control the radio frequency output power of the radio frequency module.
And step S3, controlling the radio frequency output power P of the radio frequency module 6 to change in a negative correlation with the continuous contact time ts according to the continuous contact time ts, wherein the negative correlation coefficient r1 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is larger than the negative correlation coefficient r2 between the radio frequency output power P and the continuous contact time ts when the continuous contact time ts is smaller.
When the real-time rotation speed V at which the rolling portion 3 is in contact with the body surface increases or/and the contact surface between the rolling portion 3 and the body surface decreases, the continuous contact time ts decreases. Therefore, when the control circuit board is reduced or lowered according to the variation trend of the continuous contact time ts, the rf output power of the rf module 6 is controlled to be increased to improve the rf skin care effect. Although increasing the radio frequency output power can lead to the electromagnetic field intensity near the body surface to increase, the body surface heating can not be obviously increased, thereby achieving obvious skin care effect on the premise of meeting the requirement of preventing skin scald, because: as is well known, the magnitude of heat generated by the rf magnetic field to the body surface is in a proportional relation with the rf output power P, the resistance of the body surface and the heating time, and under the condition that the resistance of the body surface is constant, although the rf output power P increases, the heating value of the body surface can be controlled not to be synchronous or obviously increased along with the increase of the rf output power P by reducing the heating time, so that the continuous contact time ts is reduced, and the continuous contact time of any position of the body surface and the rolling part 3 is reduced, namely, the time that any position of the body surface is heated by the induction of the rf signal is reduced, so that the heating value is controllable to avoid the scald of the body surface.
Meanwhile, the contact surface of the rolling part 3 on the body surface continuously changes the specific position along with the rolling process of the rolling part 3, namely the contact surface is not a surface with fixed physical position on the circumferential surface of the rolling part 3. The circumferential surface of the rolling part 3 does not belong to the abutting surface part, namely, the circumferential surface which is not abutted against the body surface at present is actually in the heat dissipation process, so that the temperature of the rolling part 3 is not too high in the long-time use process. Therefore, in the rolling process of the rolling part 3, the part of the circumferential surface of the rolling part 3, which is subjected to heat dissipation and temperature reduction, is continuously switched to be in contact with the body surface, and the rolling part 3 with lower temperature also plays a role in body surface temperature reduction so as to avoid the use risk of scalding caused by local overheating of the body surface.
When the real-time rotation speed V of the rolling part 3 against the body surface decreases or/and the contact surface between the rolling part 3 and the body surface increases, the continuous contact time ts increases. Therefore, when the variation trend of the continuous contact time ts is increased, the control circuit board correspondingly controls the radio frequency output power of the radio frequency module 6 to be reduced or lowered, so as to play a role in preventing scalding when guaranteeing the radio frequency skin care effect.
Further, when the duration ts is longer, the negative correlation coefficient r1 between the rf output power P and the duration ts is also longer. That is, on the premise that the continuous contact time ts is relatively long, when the real-time rotation speed V of the rolling part 3 abutting against the body surface increases or/and the abutting surface between the rolling part 3 and the body surface decreases, the continuous contact time ts at the current moment relatively decreases by Δts1 compared with a moment, the radio frequency output power P correspondingly increases by Δp1, so that the radio frequency power with obvious skin care effect is rapidly achieved, and meanwhile, the skin on the body surface is not scalded, and at the moment, the negative correlation coefficient r1= Δp1/Δts1; and otherwise, if the continuous contact time ts at the current moment is increased by delta ts1 compared with a moment, controlling the radio frequency output power P to correspondingly reduce delta P1 so as to avoid scalding the body surface skin under the condition that the continuous contact time ts is increased.
At smaller sustained contact times ts, the negative correlation coefficient r2 between the rf output power P and the sustained contact time ts is also smaller. On the premise of larger continuous contact time ts, the continuous contact time ts at the current moment is reduced by delta ts2 relative to a moment, so that the radio frequency output power P is correspondingly increased by delta P2, the radio frequency power with obvious skin care effect is rapidly achieved, meanwhile, the scalding of the body surface skin is not caused, and the negative correlation coefficient r2= delta P2/[ delta ] ts2; and otherwise, if the continuous contact time ts at the current moment is increased by delta ts2 compared with a moment, controlling the radio frequency output power P to correspondingly reduce delta P2 so as to avoid scalding the body surface skin under the condition that the continuous contact time ts is increased.
At this time, r2 < r1, i.e., Δp2/Δts2 < Δp1/Δts1. Even if Δp2 < Δp1when Δts2= Δts1, this indicates that the radio frequency output power P is controlled to change greatly on the premise of a longer duration of contact ts, so that the radio frequency output power P rapidly satisfies the power required for achieving an obvious radio frequency skin care effect, and at the same time, the body surface scald phenomenon does not occur. On the premise of smaller continuous contact time ts, the radio frequency output power P is controlled to change in a smaller amplitude, and the radio frequency output power P is larger at the moment so as to ensure the use safety and prevent the occurrence of body surface scalds.
Step S3 also provides a solution for the personal care apparatus to control the rf output power P in stages according to the magnitude of the sustained contact time ts.
In a preferred embodiment, step S3 includes:
if the current continuous contact time ts is in a preset first range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset first negative correlation coefficient;
if the current continuous contact time ts is in the preset second range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset second negative correlation coefficient;
if the current continuous contact time ts is in the preset third range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset third negative correlation coefficient;
wherein the first range > the second range > the third range, and the first negative correlation coefficient > the second negative correlation coefficient > the third negative correlation coefficient. Of course, the radio frequency output power when the continuous contact time ts is in the first range < the radio frequency output power when the continuous contact time ts is in the second range < the radio frequency output power when the continuous contact time ts is in the third range.
The first range generally corresponds to an initial stage of the rolling part 3 abutting against the body surface to roll, so that the radio frequency output power P is increased at the fastest speed, a user can quickly feel the body surface heating to improve the use feeling, and the radio frequency output power P can quickly reach high radio frequency power which can play an obvious skin care effect and can not cause body surface scalding, so that the radio frequency skin care effect is improved.
The second range corresponds to an acceleration stage of the rolling part 3 abutting against the body surface for rolling, the real-time rotating speed V of the rolling part 3 is continuously increased, the continuous contact time ts is continuously reduced, at this time, the radio frequency output power P is further increased in a slower manner, a space is reserved for further improving the radio frequency output power P, and meanwhile, the body surface is not scalded due to the fact that the radio frequency output power P is too high.
The third range corresponds to the end stage of acceleration of the rolling part 3 against the body surface, the real-time rotation speed V of the rolling part 3 continues to increase slightly until reaching the maximum value, the process causes the rf output power P to increase slightly further in a slower manner, and the rf output power P and the duration ts decrease slightly, which act together to ensure that overheating and scalding do not occur, thereby ensuring the safety of use.
The control scheme further comprises the following steps:
if the current continuous contact time ts is greater than the preset first range, controlling the radio frequency output power P to output at the preset first constant power P1, that is, when the continuous contact time ts is greater, the radio frequency output power P is generally output at the lower first constant power P1 when the rolling part 3 slowly rolls on the body surface, so as to ensure the use safety; wherein the first constant power P is less than or equal to the radio frequency output power when the continuous contact time ts is in the first range.
If the current continuous contact time ts is less than the preset first range, the radio frequency output power P is controlled to be output at the preset second constant power P2, that is, when the continuous contact time ts is very high, usually when the real-time rotating speed V of the rolling part 3 on the body surface is very high, the radio frequency output power P cannot be increased without the upper limit following the decrease of the continuous contact time ts, but keeps a higher second constant power P2 output to ensure the use safety, so that the body surface cannot be scalded; wherein the second constant power P is equal to or greater than the radio frequency output power when the continuous contact time ts is in the third range.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (9)
1. A method of controlling a radio frequency output of a rolling personal care device, comprising:
step S2, when the rolling part of the personal care equipment is abutted against the body surface for rolling use, the continuous contact time ts between the abutting surface of the rolling part which is currently abutted against the body surface and the body surface is obtained;
step S3, controlling the RF output power P to change inversely with the continuous contact time ts according to the continuous contact time ts: if the current continuous contact time ts is in a preset first range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset first negative correlation coefficient; if the current continuous contact time ts is in the preset second range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset second negative correlation coefficient; the first range is larger than the second range, and the first negative correlation coefficient is larger than the second negative correlation coefficient;
wherein the step of obtaining the duration ts comprises: acquiring the current real-time rotating speed V of the rolling part, and determining a proportionality coefficient a of the current abutting surface to the proportion of the circumferential surface of the rolling part; the duration ts is determined by calculation using the formula a.c/V, C representing the circumference of the cross section of the rolling section.
2. The radio frequency output control method according to claim 1, wherein the step of determining the scaling factor a comprises:
analyzing and determining the acceleration of the real-time rotating speed V;
and determining the proportionality coefficient a in a preset range by adopting the characteristic that the acceleration of the real-time rotating speed V changes in positive correlation.
3. The radio frequency output control method according to claim 1, wherein the step of determining the scaling factor a comprises:
acquiring pressure data currently representing the contact degree characteristics of the rolling part and the body surface;
the corresponding scaling factor a can be determined by using a preset pressure-abutment linear equation.
4. A radio frequency output control method as claimed in claim 3, wherein the determination of the predetermined pressure-abutment linear equation comprises the steps of:
setting a pressure sensor for representing the contact degree characteristic of the rolling part and the body surface;
corresponding proportional coefficients a under different pressure data are measured in advance, and a pressure-abutting linear equation is formed by fitting the different pressure data and the corresponding proportional coefficients a.
5. The radio frequency output control method according to claim 1, wherein step S3 further comprises:
if the current continuous contact time ts is in a preset third range, controlling the radio frequency output power P and the continuous contact time ts to change according to a preset third negative correlation coefficient, wherein the second range is larger than the third range, and the second negative correlation coefficient is larger than the third negative correlation coefficient;
wherein the radio frequency output power when the continuous contact time ts is in the first range < the radio frequency output power when the continuous contact time ts is in the second range < the radio frequency output power when the continuous contact time ts is in the third range.
6. The radio frequency output control method according to claim 5, wherein step S3 further comprises:
if the current continuous contact time ts is greater than a preset first range, controlling the radio frequency output power P to output at a preset first constant power P1, wherein the first constant power P is less than or equal to the radio frequency output power when the continuous contact time ts is in the first range;
or/and, if the current continuous contact time ts is smaller than the preset first range, controlling the radio frequency output power P to output at a preset second constant power P2, wherein the second constant power P is larger than or equal to the radio frequency output power when the continuous contact time ts is in the third range.
7. The radio frequency output control method according to claim 1, further comprising, before step S2: and judging whether the rolling part of the personal care equipment is abutted against the body surface.
8. A rolling personal care device comprises a device body with a holding part, at least one rolling part, a radio frequency module, a rotating speed detection device and a control circuit board; the radio frequency module is characterized in that the control circuit board controls the radio frequency module by adopting the radio frequency output control method according to any one of claims 1 to 7.
9. The rolling personal care appliance of claim 8, wherein the rotational speed detecting means comprises:
the light reflecting parts are uniformly distributed on the circumferential surface of the rolling part;
and the control circuit board determines the real-time rotating speed V of the rolling part according to the waveform characteristics of the light intensity current signals output by the photoelectric sensor.
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| KR101613399B1 (en) * | 2015-07-19 | 2016-04-20 | 장성철 | Seismic reinforcement driving a friction coating on a rolling unit rolling surface |
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| CN111658129A (en) * | 2020-07-07 | 2020-09-15 | 深圳半岛医疗有限公司 | Radio frequency treatment device and control method |
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Non-Patent Citations (1)
| Title |
|---|
| Jigar Daki 等.WIRELESS CONTROL FOR INDUSTRIAL INSTRUMENTS AND HOME APPLIENCES AT UHF.ResearchGate.2019,第1-4页. * |
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