CN208193119U - Sonic sensor and fetal rhythm monitoring device including it - Google Patents
Sonic sensor and fetal rhythm monitoring device including it Download PDFInfo
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- CN208193119U CN208193119U CN201720470279.9U CN201720470279U CN208193119U CN 208193119 U CN208193119 U CN 208193119U CN 201720470279 U CN201720470279 U CN 201720470279U CN 208193119 U CN208193119 U CN 208193119U
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Abstract
The utility model proposes a kind of sonic sensors, comprising: fixing piece, the first power generation film and the second power generation film, wherein the first power generation film is fixed in fixing piece；The second film adhered side surface for being set to the first power generation film of power generation when relative displacement occurs for the second power generation film and the first power generation film, exports electric signal under acoustic vibration effect.The sonic sensor can sense acoustic signals and export electric signal, can not only be used for a long time, healthy and safe, and the inspiration degree of sensor is high, at low cost, simple easily to realize.The utility model also proposed a kind of fetal rhythm monitoring device.
Description
Technical field
The utility model relates to nano generator technical field, in particular to a kind of sonic sensor and the fetal rhythm including it
Monitoring device.
Background technique
Currently, reply fetal heart sound is listened once daily after pregnancy 28 weeks, and one minute every time, to monitor the healthy shape of fetus
Condition can understand fetus in health status in utero, to find health in time by antenatal be monitored to fetal heart sound in time
Problem.
In the related technology, the invasion type fetal rhythm monitoring system based on Doppler ultrasound techniques can pick up fetal rhythm tire message
Number, although invasive ultrasonic intensity is stronger than surrounding noise signals, be suitable for each stage, influenced by uterine contraction it is smaller, surpass
Sound wave, which all has parent and fetus, to be injured, and is not suitable for being used for a long time, and is had much room for improvement.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, a purpose of the utility model is to propose a kind of sonic sensor, which can be long-term
It uses, it is healthy and safe, and also the inspiration degree of sensor is high, and it is at low cost, it is simple easily to realize.
Another purpose of the utility model is to propose a kind of fetal rhythm monitoring device.
In order to achieve the above objectives, on the one hand the utility model proposes a kind of sonic sensor, comprising:
Fixing piece, the first power generation film and the second power generation film, wherein
The first power generation film is fixed in the fixing piece；
The film adhered side surface for being set to the first power generation film of second power generation, acts in acoustic vibration
Under, when relative displacement occurs for the second power generation film and the first power generation film, export electric signal.
Optionally, the second power generation film is piezoelectric membrane, alternatively, the first power generation film and second power generation
Film is triboelectricity film.
Further, the second power generation film is fixed in the fixing piece, and the second power generation film is described in
The surface of first power generation film is arc-shaped curved surface, and the second power generation film is contacted with the first power generation film portion.
Further, the first power generation film is provided with conductive material far from the surface of the second power generation film；Institute
It states the second power generation film and the surface of the first power generation film is provided with conductive material.
Further, the both side surface of the second power generation film is provided with conductive material.
Further, further includes: sound pick up equipment, the sound pick up equipment are used for shielding noise.
Optionally, the sound pick up equipment can be pickup chamber.
In order to achieve the above objectives, on the other hand the utility model proposes a kind of sonic sensor, comprising: fixing piece, the
One power generation film and the second power generation film, wherein
The first power generation film is fixed in the fixing piece, and its surface is provided with protrusion；
The second power generation film is movably disposed in the cavity of the protrusion, described under acoustic vibration effect
Second power generation film with it is described first power generation film be in contact separate when, output electric signal.
Further, the outer surface of the protrusion of the first power generation film is provided with conductive material.
Further, further includes:
Through-hole, the through-hole is set on the first power generation film, and the through-hole is connected to the cavity.
Further, further includes:
Sound pick up equipment, the sound pick up equipment are used for shielding noise.
Optionally, the sound pick up equipment can be pickup chamber.
On the other hand the utility model proposes a kind of fetal rhythm monitoring device, comprising:
Above-mentioned sonic sensor, the sonic sensor is for detecting fetal heart sound and exporting electric signal；
Signal processing module, the signal processing module are connected with the sonic sensor, for according to the electric signal
Obtain fetal heart sound number in preset time.
Further, the signal processing module includes:
Amplifying circuit, the amplifying circuit are connected with the sonic sensor；
Filter circuit, the filter circuit are connected with the amplifying circuit；
Analog to digital conversion circuit, analog-digital conversion circuit as described are connected with the filter circuit.
Further, the signal processing module includes:
Voltage limit circuit, the voltage limit circuit are connected with analog-digital conversion circuit as described, for filtering out the fetal rhythm
Electric signal except the electric signal of sound output；
Data processing circuit, the data processing circuit are connected with the voltage limit circuit, for according to the voltage
Electric signal after limiting the filtering out of circuit output obtains fetal heart sound number in the preset time.
According to the utility model proposes sonic sensor and including its fetal heart sound monitoring device, it is thin by the first power generation
Film and the second power generation film sense acoustic signals, and under acoustic vibration effect, the second power generation film and first generates electricity film
Relative displacement, and then electric signal is exported, which can not only be used for a long time, and it is healthy and safe, and the spirit of sensor
Sensitivity is high, at low cost, simple easily to realize.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the sonic sensor of the utility model one embodiment one；
Fig. 2 is the structural schematic diagram according to the sonic sensor of one specific embodiment one of the utility model；
Fig. 3 is the structural schematic diagram according to the sonic sensor of the utility model one embodiment two；
Fig. 4 is the structural schematic diagram according to the sonic sensor of one specific embodiment two of the utility model.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The sonic sensor of the utility model embodiment is described in detail with reference to the accompanying drawings.Fig. 1 is according to this reality
With the structural schematic diagram of the sonic sensor of new embodiment.The sonic sensor 10 includes: that the power generation of fixing piece 100, first is thin
Film 201 and the second power generation film 202.
Wherein, as shown in Figure 1, specifically, the first power generation film 201 is fixed in fixing piece 100.Second power generation film
202 fittings are set to a side surface of the first power generation film 201, under acoustic vibration effect, the second power generation film 202 and first
When relative displacement occurs for the film 201 that generates electricity, electric signal is exported.The sonic sensor 10 of the utility model embodiment can sense sound wave
Signal simultaneously exports electric signal, can not only be used for a long time, healthy and safe, and the inspiration degree of sensor is high, at low cost, simple easy
It realizes.
For example, when sonic sensor 10 is for can be used as the passive biography of fetal rhythm monitoring device when detecting fetal heart sound
Sensor for accurately sensing the vibration of fetal heart sound, and generates elastic deformation, and then exports electric signal to detection circuit,
Realize the purpose of detection fetal heart sound.
Optionally, in one embodiment of the utility model, the second power generation film 202 can be piezoelectric membrane, alternatively,
First power generation film 201 and the second power generation film 202 are triboelectricity film.
Specifically, the second power generation film 202 can be piezoelectric membrane, at this point, under acoustic vibration effect, when the second hair
When relative displacement occurs for conductive film 202 and the first power generation film 201, deformation occurs for the second power generation film 202, and then exports telecommunications
Number；Alternatively, first power generation film 201 and second power generation film 202 all can be triboelectricity film, acoustic vibration act on
Under, when the first power generation film 201 and the second power generation generation relative displacement of film 202, the two is in contact separation, exports telecommunications
Number.Concrete principle can be described in detail below.
Further, in one embodiment of the utility model, the second power generation film 202 is fixed in fixing piece 100,
The surface of second power generation film 202 towards the first power generation film 201 is arc-shaped curved surface, and the second power generation film 202 and first is sent out
The contact of 201 part of conductive film.
It is understood that the second power generation film 202 can compare as shown in Figure 1, the first power generation film 201 rigidly fixes
More frivolous and surrounding is also to rigidly fix, and the surface of the second power generation film 202 towards the first power generation film 201 can be arc
Shape curved surface so that a part of area of the second power generation film 202 is contacted with the first power generation film 201, and then passes through the first power generation
Film 201 and second power generation film 202 formed a part of contact area and a part of area not in contact with unstable structure, obtain
The best sensing region of contact and non-contacting intersection.
Further, in one embodiment of the utility model, when the second power generation film 202 is piezoelectric membrane, the
The both side surface of two power generation films 202 is provided with conductive material, using the output electrode as sonic sensor 100；In this reality
With in another novel embodiment, when the first power generation film 201 and the second power generation film 202 are triboelectricity film, the
One power generation film 201 is provided with conductive material far from the surface of the second power generation film 202, and the second power generation film 202 is far from the
The surface of one power generation film 201 is provided with conductive material, thus output electrode of the conductive material as sonic sensor 10.It needs
Illustrate, conductive material for the metal layer that is arranged using coating, vapor deposition or the modes such as magnetron sputtering or can use its other party
The conductive metal oxide layer of formula setting, corresponding surface is completely covered in the metal layer or metal oxide layer.
That is, the settable conductive material of both side surface of the second power generation film 202, alternatively, the first power generation film 201
And the second mutually separate two settable conductive material in surface of power generation film 202, thus generated as output electrode output
Electric signal.
Further, in one embodiment of the utility model, as shown in Fig. 2, the sound wave of the utility model embodiment
Sensor 10 further include: sound pick up equipment 300.Wherein, sound pick up equipment 300 is used for shielding noise.
Optionally, in one embodiment of the utility model, sound pick up equipment 300 can be pickup chamber.
It is understood that sound pick up equipment 300 may include the shielding device for audio such as pickup chamber, shielding case, to realize
The purpose for shielding outside noise interference, is not specifically limited herein.For example, sound pick up equipment 300 can use stethoscopic structure,
To which sonic sensor 10 can be set on stethoscopic vibrating membrane, the purpose of detection acoustic signals such as fetal heart sound is realized.
The working principle of the sonic sensor of embodiment one is described in detail below.
As shown in Figure 1, sound wave can be transferred to the first power generation film 201 and second when sonic sensor 10 detects sound wave
The contact of power generation film 202 and the best sensing region of non-contacting intersection, the second power generation film 202 directly sense sound wave,
So that film generate vibration, thus second power generation film 202 deformation occurs or second power generation film 202 with first generate electricity film
201 contact separations generate electric signal and export, and realize the purpose of detection sound wave.
Fig. 3 is the structural schematic diagram according to the sonic sensor of the utility model one embodiment two.Shown in Fig. 3, this reality
It is with the sonic sensor of new embodiment and the difference of the sonic sensor of embodiment one: the first power generation film 201
Surface is equipped with protrusion, and the second power generation film 202 is movably disposed in the cavity of protrusion.
Specifically, as shown in figure 3, the sonic sensor 10 of the utility model embodiment includes: that fixing piece 100, first is sent out
Conductive film 201 and the second power generation film 202, the first power generation film 201 are fixed in fixing piece 100, and the first power generation film
201 surface is provided with protrusion, and the second power generation film 202 is movably disposed in the cavity of protrusion, makees in acoustic vibration
Under, second power generation film 202 with first power generation film 201 be in contact separate when, output electric signal.
Further, in one embodiment of the utility model, the outer surface setting of the protrusion of the first power generation film 201
There is conductive material, for example, can be for the metal layer that is arranged using coating, vapor deposition or the modes such as magnetron sputtering or using other modes
The conductive metal oxide layer of setting.
Specifically, thin with the first power generation film 201 in embodiment one and the second power generation in the embodiments of the present invention
Film 202 is fixed the difference is that the second power generation film 202 is floating film.As shown in figure 3, the first power generation film 201 is collection sound
Film, the first power generation film 201 is mainly used to collect sound wave, and the first power generation film 201 is still fixed film, and the first power generation is thin
201 surface of film is provided with protrusion, and conductive material has can be set using as output electrode in the outer surface of protrusion, another electrode is
Greatly, to constitute the friction generator of stagged electrode structure.Wherein, the film as shown in figure 3, the floating film i.e. second at center generates electricity
202 be free state, can be not make herein with films such as certain rigid PP, PET, PC, PE if thickness is lower than 10 μm
Concrete restriction.Optionally, protrusion can both be fixed on 201 surface of the first power generation film after being fabricated separately, can also be with first
Generate electricity 201 integral production of film, is not specifically limited herein.
Further, in one embodiment of the utility model, as shown in figure 3, the sound wave of the utility model embodiment
Sensor 10 further include: through-hole 400.Wherein, through-hole 400 is set on the first power generation film 201, and through-hole 400 and cavity
Connection.For example, the diameter of through-hole 400 can be less than 0.5mm, so that sound wave can be entered with via through holes 400 generates vibration in cavity.
Further, in one embodiment of the utility model, as shown in figure 4, the sound wave of the utility model embodiment
Sensor 10 further include: sound pick up equipment 300.Wherein, sound pick up equipment 300 is used for shielding noise.
Optionally, in one embodiment of the utility model, sound pick up equipment 300 can be pickup chamber.
It is understood that sound pick up equipment 300 may include the shielding device for audio such as pickup chamber, shielding case, to realize
The purpose for shielding outside noise interference, is not specifically limited herein.For example, sound pick up equipment 300 can use stethoscopic structure,
To which sonic sensor 10 can be set on stethoscopic vibrating membrane, realization detects the purpose of acoustic signals such as fetal heart sound, and
And through-hole is also preferably opened up on vibrating membrane, effectively improve the intensity that sound wave enters sonic sensor.
The working principle of the sonic sensor of embodiment two is described in detail below.
As shown in figure 3, when sonic sensor 10 detect sound wave when, sound wave by first power generation film 201 through-hole 400 into
Enter vibration cavity i.e. cavity, so as to cause the vibration of the second power generation film 202 in vibration cavity, leads to the second power generation film 202 and the
One power generation film 201 is in contact separation, to generate electric signal and export, realizes the purpose of detection sound wave.
In addition, in one embodiment of the utility model, floating film i.e. second generates electricity film 202 can also wherein one end
Fixed setting, and may include a floating membrane structure in sensor, can also include multiple floating membrane structures, it is superfluous to reduce
It is remaining, it is not described in detail herein.
It should be noted that as shown in figure 4, the sonic sensor 10 of the utility model embodiment can contain shielding case, pick up
The supplementary structures such as sound chamber, set-up mode are the same as example 1, and therefore not to repeat here.
According to the sonic sensor that the utility model embodiment proposes, pass through the first power generation film and the second power generation film sense
Acoustic signals are surveyed, under acoustic vibration effect, relative displacement occurs for the second power generation film and the first power generation film, and then exports electricity
Signal can not only be used for a long time, healthy and safe, and the inspiration degree of sensor is high, at low cost, simple easily to realize.
In addition, the embodiments of the present invention also proposed a kind of fetal rhythm monitoring device, which includes upper
The sonic sensor and signal processing module stated.Wherein, sonic sensor is for detecting fetal heart sound and exporting electric signal.At signal
Reason module is connected with sonic sensor, for obtaining fetal heart sound number in preset time according to electric signal.The utility model is implemented
The fetal rhythm monitoring device of example it is possible to prevente effectively from Doppler ultrasound techniques to the health effect of fetus, and can be used for a long time,
High sensitivity, it is at low cost, effectively meet the requirement of user.
Further, in one embodiment of the utility model, signal processing module includes: amplifying circuit, filtered electrical
Road and analog to digital conversion circuit.
Wherein, amplifying circuit is connected with sonic sensor.Filter circuit is connected with amplifying circuit.Analog to digital conversion circuit and filter
Wave circuit is connected.
It is understood that sonic sensor is used to the pressure conversion of the effect of vibration of fetal heart sound on it be telecommunications
Number, and signal processing module is connected with the output end of sonic sensor, the electric signal that sonic sensor is exported is converted.
Specifically, amplifying circuit is for amplifying the electric signal of sonic sensor, and filter circuit is for filtering out amplifying circuit output
Amplified electric signal in clutter.Analog to digital conversion circuit is used to filtered analog signal being converted to digital signal.
Further, in one embodiment of the utility model, signal processing module further include: voltage limit circuit and
Data processing circuit.
Wherein, voltage limit circuit is connected with analog to digital conversion circuit, and voltage limit circuit is used to filter out fetal heart sound output
Electric signal except electric signal.Data processing circuit is connected with voltage limit circuit, and data processing circuit according to voltage for limiting
Electric signal after determining the filtering out of circuit output obtains fetal heart sound number in preset time.
It is understood that the active force as the output voltage of nano generator and suffered by it is in the pass of approximately linear
System, in addition to fetal heart sound can make sonic sensor export electric signal, other noises also inevitably produce sonic sensor
Raw electric signal output, therefore filtered out the voltage output other than fetal heart sound using voltage limit circuit, i.e., for filter out by
Fetal heart sound vibrates and the electric signal except the electric signal of output.Data processing circuit handles the signal received, thus
Fetal heart sound number in certain time is calculated, the time can be configured by those skilled in the art, is not specifically limited herein.
The working principle of the fetal rhythm monitoring device of the utility model embodiment is described in detail below.
When using the fetal heart sound monitoring device of the utility model embodiment, the vibration meeting of fetal heart sound is so that sonic sensor
Middle generation vibration, so that sonic sensor 10 be motivated to generate charge, sonic sensor exports electric signal, signal processing module pair
The electric signal received is handled to obtain fetal heart sound number in certain time, realizes the monitoring to the health status of fetus, with
Just health problem is found in time.
According to the fetal heart sound monitoring device that the utility model embodiment proposes, fetal heart sound is supervised by sonic sensor
It surveys, can not only be used for a long time, it is healthy and safe, and also the inspiration degree of sensor is high, and it is at low cost, it is simple easily to realize.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (10)
1. a kind of sonic sensor, including fixing piece, which is characterized in that further include: the first power generation film and the second power generation are thin
Film, wherein
The first power generation film is fixed in the fixing piece；
The film adhered side surface for being set to the first power generation film of second power generation, under acoustic vibration effect, institute
When stating the second power generation film and the first power generation film generation relative displacement, electric signal is exported；The second power generation film is solid
It is scheduled in the fixing piece, the surface of the second power generation film towards the first power generation film is arc-shaped curved surface, and described
Second power generation film is contacted with the first power generation film portion.
2. sonic sensor according to claim 1, which is characterized in that the second power generation film is piezoelectric membrane, or
Person, the first power generation film and the second power generation film are triboelectricity film.
3. sonic sensor according to claim 1, which is characterized in that the first power generation film is far from second hair
The surface of conductive film is provided with conductive material；The second power generation film is provided with far from the surface of the first power generation film and leads
Electric material.
4. sonic sensor according to claim 1, which is characterized in that the both side surface of the second power generation film is all provided with
It is equipped with conductive material.
5. sonic sensor according to claim 1-4, which is characterized in that further include:
Sound pick up equipment, the sound pick up equipment are used for shielding noise.
6. a kind of sonic sensor characterized by comprising fixing piece, the first power generation film and the second power generation film,
In,
The first power generation film is fixed in the fixing piece, and its surface is provided with protrusion；
The second power generation film is movably disposed in the cavity of the protrusion, under acoustic vibration effect, described second
Power generation film with it is described first power generation film be in contact separate when, export electric signal, wherein it is described second generate electricity film be floating
Dynamic film.
7. sonic sensor according to claim 6, which is characterized in that the outer surface of the protrusion of the first power generation film
It is provided with conductive material.
8. sonic sensor according to claim 6, which is characterized in that further include:
Through-hole, the through-hole is set on the first power generation film, and the through-hole is connected to the cavity.
9. according to the described in any item sonic sensors of claim 6-8, which is characterized in that further include:
Sound pick up equipment, the sound pick up equipment are used for shielding noise.
10. a kind of fetal rhythm monitoring device, including signal processing module characterized by comprising
Such as the described in any item sonic sensors of claim 1-9, the sonic sensor is connected with the signal processing module,
For detecting fetal heart sound and exporting electric signal.
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| CN201720470279.9U CN208193119U (en) | 2017-04-27 | 2017-04-27 | Sonic sensor and fetal rhythm monitoring device including it |
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| CN201720470279.9U CN208193119U (en) | 2017-04-27 | 2017-04-27 | Sonic sensor and fetal rhythm monitoring device including it |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310556A (en) * | 2019-09-29 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Battery module isolation member and assembly method thereof, battery module, battery pack, vehicle and battery expansion monitoring method |
| CN114838812A (en) * | 2022-04-14 | 2022-08-02 | 南京高华科技股份有限公司 | Self-starting micro mechanical acoustic wave sensor and manufacturing method thereof |
-
2017
- 2017-04-27 CN CN201720470279.9U patent/CN208193119U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310556A (en) * | 2019-09-29 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Battery module isolation member and assembly method thereof, battery module, battery pack, vehicle and battery expansion monitoring method |
| CN112310556B (en) * | 2019-09-29 | 2022-01-18 | 宁德时代新能源科技股份有限公司 | Battery module isolation member and assembly method thereof, battery module, battery pack, vehicle and battery expansion monitoring method |
| CN114838812A (en) * | 2022-04-14 | 2022-08-02 | 南京高华科技股份有限公司 | Self-starting micro mechanical acoustic wave sensor and manufacturing method thereof |
| CN114838812B (en) * | 2022-04-14 | 2024-01-19 | 南京高华科技股份有限公司 | Self-starting micromechanical acoustic wave sensor and manufacturing method thereof |
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