CN1229343A - Human body sensor for seat - Google Patents

Human body sensor for seat Download PDF

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Publication number
CN1229343A
CN1229343A CN 96180448 CN96180448A CN1229343A CN 1229343 A CN1229343 A CN 1229343A CN 96180448 CN96180448 CN 96180448 CN 96180448 A CN96180448 A CN 96180448A CN 1229343 A CN1229343 A CN 1229343A
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China
Prior art keywords
seat
vibration
detection device
human body
aforementioned
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CN 96180448
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Chinese (zh)
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CN1129385C (en
Inventor
渡边义明
荻野弘之
井上雅笃
吉永健实
岩佐隆司
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to CN 96180448 priority Critical patent/CN1129385C/en
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Publication of CN1129385C publication Critical patent/CN1129385C/en
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  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A human body detector for a seat which does not deteriorate comfort of sitting even when it is disposed on the seat, has a high sensitivity and can be easily fitted to the seat. Vibration detection means is disposed in such a manne that even when a person is seated, the means comes into contact with the bottom surface of a seat pad of a seat and accordingly the person does not feel the means. According to this construction,the human body does not easily feel the means by the provision of the seta pad, the existence of the vibration detection means is hardly felt even when the hardness and the shape are changed, and various measures for improving the sensitivity of the vibration detection means can be taken. The vibration detection means may be merely bonded to the seat pad or may be fixed to a seat spring or a seat frame, and can be fitted more easily to the seat than when it is disposed below a surface cloth of the seat.

Description

The seat human body detection device
Technical field
The present invention relates to detect the structure that human body detection device and vibration detection device are used in the seat whether people is arranged on the seat by vibration.
Background technology
In recent years, pursue and improve comfortableness and the security that gives human body, wherein aspect comfortableness and the security excellent effect is being arranged with the method for the residing confined space environment of people being carried out indivedual controls especially, so develop various device and method.And if just work can make equipment that limited space environment is controlled only have the people to exist in this space the time, just can save the energy and reduce the loss of equipment, so adopting the whole bag of tricks that the human body that is present in this space is detected.
Traditional this seat is as follows with human body detection device.For example in D E.PAT.No.4237072, just use laminar pressure sensor 1 shown in Figure 1, by constituting the seat human body detection device under the top layer cloth that it is arranged on the seat.Laminar pressure sensor 1 is that a plurality of piezo-resistances 3 that are electrically connected in parallel by conductor 2 respectively are set on basic thin slice, conductor 2 is connected with 2 terminals of terminal part 4, can detect the pressure that is applied on the laminar pressure sensor 1 by checking the resistance value between terminal.Promptly, adopt this structure, in case there is the people on the seat, to take one's seat, the pressure that its body weight produces just is applied to any one in a plurality of piezoresistors 3, the resistance value that has been applied in the piezoresistor 3 of pressure will descend, resistance value between 2 terminals of terminal part 4 of the whole resistance value of expression is descended, detect, just can detect the existence of human body on the seat by decline to this resistance value.
Yet when adopting said structure, even article are placed on the seat, the weight of article also can make the resistance value of piezoresistor 3 descend, and the detection that the result leads to errors takes place.In addition, if laminar pressure sensor 1 is arranged on the position of leaving top layer, seat cloth, it is far away more then to leave top layer cloth, human body institute applied pressure looses with regard to overstepping the bounds of propriety, so must improve the sensitivity of piezoresistor 3, and as for fear of this point it is arranged on position near top layer cloth, then when the people takes one's seat, can feel it existence and produce sense of discomfort, that is, sensitivity and comfort are difficult to get both.Also have, when being installed in laminar pressure sensor 1 on the seat, make the part of piezoresistor 3 be in the state that is under pressure if depart from the tram, then the resistance of piezoresistor 3 descends, can make the judgement that the someone takes one's seat all the time, for fear of this thing happens, it is especially careful when being installed to sensor 1 on the seat to require.
In addition, at US.PAT.No.5,404, in 128, as shown in Figure 2, be that vibration detection device 5 is installed in the seat, convert the vibration of generations such as the action of human body or breathing to electric signal, and handle with 6 pairs of these signals of signal processing apparatus, judge with this whether the object on the seat is human body.Wherein, vibration detection device 5 uses laminar piezoelectric element, the weak vibration that physiological phenomenons such as breathing that produces when coming human body to take one's seat by it or heartbeat cause, therefore can distinguish with the article that can not produce this class vibration that are placed on the seat, so only on the seat, have man-hour just to be judged as the people reliably.In addition, in this conventional case, this human body detection device is being installed on the automobile-used seat, and when placing this vibration environment, man-hour is being arranged on the seat, with the vibration of encouraging the vibration frequency of shaking together, the vibration component of the eigentone of human body also shows very greatly, and when having article to place on the seat and during no any article placement, this vibration component does not occur, even it is also very low its degree to occur, so when man-hour or nobody are arranged, show evident difference.Therefore, 2 filter 7a and 7b are set on signal processing apparatus 6, the 1st filter 7a carries out filtering to the signal component that people's intrinsic vibration causes, the 2nd filter 7b then carries out filtering to the signal component that the vibration of vehicle causes, set filter characteristic like this, the vibration component that 10 of judgment means utilize these outputs to take out the people from the vibration of vehicle is judged, so the occasion that can only have the people to exist on the seat judges reliably that just the people is arranged.Also have, here the output of the 1st, the 2nd filter 7a, 7b is exaggerated device 8a, 8b respectively and amplifies, outputed to judgment means 10 behind leveling device 9a, the 9b leveling again, in addition, have or not the information of human body to be output to the control device 11 of automobile on the seat of judging with judgment means 10, control device 11 is according to having or not the information of human body to control running gear 12, seat control device 13 and alarm device 14.
Yet,, still fail to solve the problem of the sensitivity that takes into account vibration detection device 5 and the comfort of taking one's seat even in this occasion.In addition, in 2 above-mentioned conventional example, if laminar pressure sensor 1 or vibration detection device 5 are arranged near the cloth of top layer, if then there is water to be sprinkled upon on the seat, or the mistakes such as cigarette of band fire are when dropping on the seat, laminar pressure sensor 1 or vibration detection device 5 are subject to the influence of moisture or heat, can not bring into play the performance of regulation sometimes.
Disclosure of an invention
In order to address the above problem, its 1st purpose is, even provide a kind of being arranged on also can not influence the seat of the comfort of taking one's seat human body detection device on the seat just in the present invention.
The 2nd purpose is, provides a kind of fault less seat human body detection device.
The 3rd purpose is, a kind of highly sensitive seat human body detection device is provided.
The 4th purpose is, a kind of seat human body detection device that is installed to easily on the seat is provided.
In order to realize the above-mentioned the 1st and the 2nd purpose, the signal processing apparatus that seat of the present invention is handled by: the vibration detection device that the vibration at the human body of taking one's seat on the seat is detected, to the output of aforementioned vibration detection device with human body detection device, judge that according to the output of aforementioned signal processing apparatus the judgment means that has or not human body on the aforementioned seat constitutes, aforementioned vibration detection device is arranged on certain at aforementioned seat, makes the human body that sits on the aforementioned seat can not feel its existence.
In order to realize above-mentioned the 1st purpose, seat of the present invention with human body detection device on, the output signal that signal processing apparatus has vibration detection device is divided into a plurality of filters of exporting behind the different a plurality of signals of frequency content.
In order to realize the above-mentioned the 1st and the 4th purpose, seat of the present invention with human body detection device on, the seat has cushion spring, vibration detection device is fixedly installed on the aforementioned seat spring.
In order to realize the above-mentioned the 1st and the 4th purpose, seat of the present invention with human body detection device on, the seat has the seat cushion filler, vibration detection device contacts with aforementioned seat filler bottom surface.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the seat has the cushion frame of seat cushion filler and this seat cushion filler of supporting, vibration detection device is arranged on the set shoestring in aforementioned seat filler below, and aforementioned shoestring is by being connected with the aforementioned seat framework and applying tension force according to the load from the aforementioned seat filler.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the seat has the cushion spring of seat cushion filler and this seat cushion filler of supporting, vibration detection device is arranged on the set shoestring in aforementioned seat filler below, and aforementioned shoestring is by being connected with the aforementioned seat spring and applying tension force according to the load from the aforementioned seat filler.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the seat has the cushion frame of supporting seat cushion filler, vibration detection device has by external force and produces the piezoelectric element of electric charge and apply the tension force applying unit of tension force on this piezoelectric element, and aforementioned tension force applying unit applies on aforementioned piezoelectric element by aforementioned piezoelectric element is connected with the aforementioned seat framework and from the corresponding tension force of the load of aforementioned seat filler.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the seat has the cushion spring of supporting seat cushion filler, vibration detection device has by external force and produces the piezoelectric element of electric charge and apply the tension force applying unit of tension force on this piezoelectric element, and aforementioned tension force applying unit applies on aforementioned piezoelectric element by aforementioned piezoelectric element is connected with the aforementioned seat spring and from the corresponding tension force of the load of aforementioned seat filler.
In order to realize above-mentioned the 2nd purpose, seat of the present invention with human body detection device on, vibration detection device has the tension force control part that the tension force that is applied on the piezoelectric element is limited.
In order to realize above-mentioned the 2nd purpose, seat of the present invention with human body detection device on, the tension force control part is longer than piezoelectric element by size and draftability is formed less than the member of aforementioned piezoelectric element, its two ends are connected with the two ends of aforementioned piezoelectric element.
In order to realize above-mentioned the 2nd purpose, seat of the present invention with human body detection device on, the tension force control part has the elastomer that the end with piezoelectric element is connected with cushion frame.
In order to realize above-mentioned the 2nd purpose, seat of the present invention with human body detection device on, the tension force control part has the elastomer that the end with piezoelectric element is connected with cushion spring.
In order to realize above-mentioned the 1st, the 3rd and the 4th purpose, seat of the present invention with human body detection device on, the vibration detecting part of electric signal is exported in the vibration that vibration detection device is subjected to by basis and the padded coaming that the vibration that is subjected to is absorbed constitutes, and aforementioned vibration detecting part is clipped between seat cushion filler bottom surface and the aforementioned padded coaming.
In order to realize the above-mentioned the 3rd and the 4th purpose, seat of the present invention with human body detection device on, vibration detecting part is fixed on the surface of padded coaming, and the one side that is fixed with aforementioned vibration detecting part of aforementioned padded coaming together is installed in seat cushion filler bottom surface with aforementioned vibration detecting part.
In order to realize the above-mentioned the 3rd and the 4th purpose, seat of the present invention with human body detection device on, the seat has the cushion frame of supporting seat cushion filler, vibration detecting part is fixed on the surface of padded coaming, the one side that is fixed with aforementioned vibration detecting part of aforementioned padded coaming is arranged to make aforementioned vibration detecting part and aforementioned seat filler state of contact, is installed in simultaneously on the aforementioned seat framework.
In order to realize the above-mentioned the 3rd and the 4th purpose, seat of the present invention with human body detection device on, the seat has the cushion spring of supporting seat cushion filler, vibration detecting part is fixed on the surface of padded coaming, the one side that is fixed with aforementioned vibration detecting part of aforementioned padded coaming is arranged to make aforementioned vibration detecting part and aforementioned seat filler state of contact, is installed in simultaneously on the aforementioned seat spring.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, padded coaming has for being fixed on the space that its surperficial vibration detecting part vibrates.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the space is arranged on the recess of padded coaming one side, vibration detecting part is arranged on the one side opposite with aforementioned recess of aforementioned padded coaming and the position aforementioned recess subtend, and the one side that is provided with aforementioned vibration detecting part of aforementioned padded coaming together contacts installation with the seat cushion filler bottom surface at seat with aforementioned vibration section.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the space is provided in a side of the through hole on the padded coaming, aforementioned vibration detecting part covers aforementioned through hole, and the one side that is provided with aforementioned vibration detecting part of aforementioned padded coaming together contacts installation with the seat cushion filler bottom surface at seat with aforementioned vibration detecting part.
In order to realize the above-mentioned the 2nd and the 3rd purpose, seat of the present invention with human body detection device on, the space is a plurality of spaces.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, the structure of padded coaming is not uniformly, the one side that vibration detecting part contacted is vibrated than the easier absorption of its opposite one side.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, padded coaming constitutes with the different materials more than at least 2 kinds, and the one side that vibration detecting part contacted adopts the material that vibrates than the easier absorption of its opposite one side.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, padded coaming is made of expanded material, and the foaming density of the one side that vibration detecting part contacted is less than its opposite one side.
In order to realize above-mentioned the 3rd purpose, seat of the present invention with human body detection device on, padded coaming constitutes with the different material of hardness, and the hardness of the one side that vibration detecting part contacted is higher than its opposite one side.
Because adopt said structure, seat of the present invention has following effect with human body detection device.
Promptly, when adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body will pass to and be located at the take one's seat vibration detection device of imperceptible its existence of people of certain on the aforementioned seat and order, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
In addition, when adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body will pass to and be located at the take one's seat vibration detection device of imperceptible its existence of people of certain on the aforementioned seat and order, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Aforementioned signal processing apparatus outputs to judgment means after with a plurality of wave filters of its inside the output signal of aforementioned vibration detection device being divided into the different a plurality of signals of frequency content, and aforementioned judgment means judges according to a plurality of output signals of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration detection device of imperceptible its existence of people that the vibration of human body will pass on the cushion spring that is located at aforementioned seat and order is taken one's seat, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body will pass to the vibration detection device that contacts and make imperceptible its existence of people of taking one's seat with the seat cushion filler bottom surface at aforementioned seat, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, will make imperceptible its existence of the people that takes one's seat contacting with the seat cushion filler bottom surface at aforementioned seat, and applying and the corresponding tension force of the load of human body according on the state that produce tension force from the load of aforementioned seat filler and the shoestring that cushion frame is connected, transmit the vibration of human body simultaneously, this vibration is delivered to the vibration detection device that is located on the aforementioned shoestring again, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, will make imperceptible its existence of the people that takes one's seat contacting with the seat cushion filler bottom surface at aforementioned seat, and applying and the corresponding tension force of the load of human body according on the state that produce tension force from the load of aforementioned seat filler and the shoestring that cushion spring is connected, transmit the vibration of human body simultaneously, this vibration is delivered to the vibration detection device that is located on the aforementioned shoestring again, aforementioned vibration detection device produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that the cushion frame with aforementioned seat is connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that the cushion spring with aforementioned seat is connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that cushion frame or cushion spring with aforementioned seat are connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.On the other hand, when because impulsive force when taking one's seat etc. may make the overtension that is applied on the aforementioned piezoelectric element time, the tension force control part is just controlled the tension force that is applied on the aforementioned piezoelectric element, to avoid applying the tension force above preset value on aforementioned piezoelectric element.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that cushion frame or cushion spring with aforementioned seat are connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.On the other hand, when because impulsive force when taking one's seat etc. may make the overtension that is applied on the aforementioned piezoelectric element time, just the tension force that is applied on the aforementioned piezoelectric element is controlled by the tension force control part that size is longer than aforementioned piezoelectric element and draftability is formed less than the member of aforementioned piezoelectric element and the two ends of its two ends and aforementioned piezoelectric element are fixing, to avoid on aforementioned piezoelectric element, applying tension force above preset value.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that the cushion frame with aforementioned seat is connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.On the other hand, when because impulsive force when taking one's seat etc. may make the overtension that is applied on the aforementioned piezoelectric element time, the tension force control part that the elastomer that is connected with the aforementioned seat framework by the end with aforementioned piezoelectric element constitutes is just controlled the tension force that is applied on the aforementioned piezoelectric element, to avoid applying the tension force above preset value on aforementioned piezoelectric element.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, take one's seat the piezoelectric element of imperceptible its existence of people with regard to according to applying tension force from the load of aforementioned seat filler by the tension force applying unit that the cushion spring with aforementioned seat is connected with aforementioned piezoelectric element with contact of the bottom surface of seat cushion filler and order, transmit the vibration of human body simultaneously, aforementioned piezoelectric element produces signal according to the size of the vibration that passes over, and this signal is outputed to signal processing apparatus.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detection device is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.On the other hand, when because impulsive force when taking one's seat etc. may make the overtension that is applied on the aforementioned piezoelectric element time, the tension force control part that the elastomer that is connected with the aforementioned seat spring by the end with aforementioned piezoelectric element constitutes is just controlled the tension force that is applied on the aforementioned piezoelectric element, to avoid applying the tension force above preset value on aforementioned piezoelectric element.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, and its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat.On the other hand, though also have from the cushion frame of supporting aforementioned seat filler etc. be not that the useless vibration component of human body is delivered to aforementioned vibration detection device, this vibration component be will be absorbed by the aforementioned buffer component of aforementioned vibration detection device and decay after vibration be delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, the one side that is fixed with vibration detecting part of its buffer component together is installed on the seat cushion filler bottom surface at aforementioned seat with aforementioned vibration detecting part, order imperceptible its existence of people of taking one's seat.On the other hand, though also have from the cushion frame of supporting aforementioned seat filler etc. be not that the useless vibration component of human body is delivered to aforementioned vibration detection device, this vibration component be will be absorbed by the aforementioned buffer component of aforementioned vibration detection device and decay after vibration be delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, the one side that is fixed with vibration detecting part of its buffer component together contacts with the seat cushion filler at aforementioned seat with aforementioned vibration detecting part, be installed on the seat mount of supporting aforementioned seat filler order imperceptible its existence of people of taking one's seat simultaneously.On the other hand, though also have from the cushion frame of supporting aforementioned seat filler be not that the useless vibration component of human body is delivered to aforementioned vibration detection device, this vibration component be will be absorbed by the aforementioned buffer component of aforementioned vibration detection device and decay after vibration be delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, the one side that is fixed with vibration detecting part of its buffer component together contacts with the seat cushion filler at aforementioned seat with aforementioned vibration detecting part, be installed on the cushion spring of supporting aforementioned seat filler order imperceptible its existence of people of taking one's seat simultaneously.On the other hand, though also have from the aforementioned seat spring be not that the useless vibration component of human body is delivered to aforementioned vibration detection device, this vibration component be will be absorbed by the aforementioned buffer component of aforementioned vibration detection device and decay after vibration be delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat, and because aforementioned buffer component has the space in the vibrative part of aforementioned vibration detecting part, so can not hinder the free vibration of the aforementioned vibration detecting part that the vibration from the aforementioned seat filler causes, can transmit bigger vibration.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component has the space in the vibrative part of aforementioned vibration detecting part, so the composition that is directly delivered to aforementioned vibration detecting part seldom, and be that the vibration after the decay is delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat, and because aforementioned buffer component has recess in the part with aforementioned vibration detecting part subtend of one side of fixing aforementioned vibration detecting part and opposite one side, so not conference hinders the free vibration of the aforementioned vibration detecting part that the vibration from the aforementioned seat filler causes, and can transmit bigger vibration.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component has recess with the part of aforementioned vibration detecting part subtend on the opposite one side of the one side that is fixed with aforementioned vibration detecting part, so the composition that is directly delivered to aforementioned vibration detecting part seldom, and be that the vibration after the decay is delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat, and because aforementioned buffer component is provided with through hole, and aforementioned vibration detecting part covers aforementioned through hole, so can not hinder the free vibration of the aforementioned vibration detecting part that the vibration from the aforementioned seat filler causes, can transmit bigger vibration.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component has aforementioned through hole, and aforementioned vibration detecting part covers aforementioned through hole, so the composition that is directly delivered to aforementioned vibration detecting part seldom, and be that the vibration after the decay is delivered to aforementioned vibration detecting part.Aforementioned vibration detection device outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat, and because aforementioned buffer component has a plurality of spaces in the vibrative part of aforementioned vibration detecting part, so can not hinder the free vibration of the aforementioned vibration detecting part that the vibration from the aforementioned seat filler causes, can transmit bigger vibration.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component has a plurality of spaces in the vibrative part of aforementioned vibration detecting part, so the composition that is directly delivered to aforementioned vibration detecting part still less, and be that the vibration after the decay significantly is delivered to aforementioned vibration detecting part.In addition, owing between aforementioned a plurality of spaces, there is the filler of aforementioned buffer component to exist, prevented that aforementioned vibration detecting part from peeling off from the aforementioned seat filler, so can steadily in the long term the human body vibration from the aforementioned seat filler be delivered to aforementioned vibration detecting part.Aforementioned checkout gear outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, and its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component the absorption easily than opposite one side with one side aforementioned vibration detecting part contact vibrated, so the composition that is directly delivered to aforementioned vibration detecting part still less, and be that the vibration after the decay significantly is delivered to aforementioned vibration detecting part.Aforementioned checkout gear outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, and its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component constitutes with materials different more than 2 kinds at least, and adopt the material that vibrates than the easier absorption of opposite one side with the one side of aforementioned vibration detecting part contact, so the composition that is directly delivered to aforementioned vibration detecting part still less, and be that the vibration after the decay significantly is delivered to aforementioned vibration detecting part.Aforementioned checkout gear outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, and its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component is made of expanded material, and with the foaming density of the one side of aforementioned vibration detecting part contact less than opposite one side, so the composition that is directly delivered to aforementioned vibration detecting part still less, and be that the vibration after the decay significantly is delivered to aforementioned vibration detecting part.Aforementioned checkout gear outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
When adopting seat of the present invention to use human body detection device, in case there is the people to be seated on the seat, the vibration of human body just is delivered to vibration detection device, and its vibration detecting part is installed between the bottom surface of seat cushion filler at buffer component and aforementioned seat, order imperceptible its existence of people of taking one's seat.On the other hand, though have not is that the useless vibration component of human body is delivered to aforementioned vibration detection device from the cushion frame of supporting aforementioned seat filler etc. yet, but because of this vibration component is absorbed and decay by the aforementioned buffer component of aforementioned vibration detection device, and aforementioned buffer component constitutes with the different material of hardness, and be higher than opposite one side with the hardness of the one side of aforementioned vibration detecting part contact, so the composition that is directly delivered to aforementioned vibration detecting part still less, and be that the vibration after the decay significantly is delivered to aforementioned vibration detecting part.Aforementioned checkout gear outputs to signal processing apparatus with aforementioned vibration detecting part according to the signal that the size of these vibrations that pass over produces.Output to judgment means after the signal that aforementioned signal processing apparatus is stipulated the output signal of aforementioned vibration detecting part is handled, aforementioned judgment means judges according to the output of aforementioned signal processing apparatus whether the someone takes one's seat on the aforementioned seat.
Simple declaration to accompanying drawing
Fig. 1 is the outward appearance vertical view of the laminar pressure sensor of traditional human body detection device.
Fig. 2 is the calcspar of above-mentioned human body detection device.
Fig. 3 is equipped with the sectional block diagram of the seat of the present invention the 1st embodiment with the seat of human body detection device.
Fig. 4 is the calcspar of said apparatus.
Fig. 5 is the cutaway view of the acceleration transducer of said apparatus.
Fig. 6. be that the sectional block diagram of the seat of the present invention the 2nd embodiment with the seat of human body detection device is installed.
Fig. 7 is the calcspar of said apparatus.
Fig. 8 is the stereogram of the seat of the present invention the 3rd embodiment with the vibration detection device of human body detection device.
Fig. 9 is the sectional block diagram that the seat of said apparatus is installed.
Figure 10 is the stereogram of the seat of the present invention the 4th embodiment with the vibration detection device of human body detection device.
Figure 11 is equipped with the sectional block diagram at the seat of said apparatus.
Figure 12 is the stereogram of the seat of the present invention the 5th embodiment with the vibration detection device of human body detection device.
Figure 13 is the stereogram of the seat of the present invention the 6th embodiment with the vibration detection device of human body detection device.
Figure 14 is equipped with the cutaway view of the seat of the present invention the 7th embodiment with the seat of human body detection device.
Figure 15 is the stereogram of the vibration detection device of said apparatus.
Figure 16 is the calcspar of said apparatus.
Figure 17 (a) is equipped with the cutaway view of the seat of the present invention the 8th embodiment with the seat of human body detection device.
Figure 17 (b) is the partial perspective view that the seat of said apparatus is installed.
Figure 18 is equipped with the cutaway view of the seat of the present invention the 9th embodiment with the seat of human body detection device.
Figure 19 (a) is the stereogram that is fixed with the one side of vibration detecting part on the buffer component of vibration detection device of said apparatus.
Figure 19 (b) is a stereogram of not establishing the another side of vibration detecting part on the buffer component of vibration detection device of said apparatus.
Figure 19 (c) is the A-A cutaway view of the vibration detection device of said apparatus.
The optimal morphology that carries out an invention
Below in conjunction with Fig. 3-Figure 19 embodiments of the invention are described.
Fig. 3 is equipped with the sectional block diagram of the seat of the present invention the 1st embodiment with the seat of human body detection device.Fig. 4 is the calcspar of said apparatus.5 ' is the acceleration transducer that uses as vibration detection device among the figure, the 15th, and the top layer cloth at seat 19, the 16th, seat cushion filler, the 17th, cushion spring, the 18th, cushion frame, the 20th, power supply, the 21st, resistance circuit, the 6th, signal processing apparatus, the 10th, judgment means.Wherein, signal processing apparatus 6 is made of amplifying device 8, filter 7, leveling device 9.
In the present embodiment, vibration detection device 5 uses acceleration transducer 5 ', this acceleration transducer 5 ' is with the acceleration that vibration produces resistive element to be deformed, again this distortion is converted to electric signal as resistance variations, this acceleration transducer 5 ' is fixed on the cushion spring 17 as the part at seat 19, and the face that this cushion spring 17 contacts with the human body at seat 19 with seat cushion filler 16 across top layer cloth 15 is at a distance of more than the certain distance r.Here, r makes the human body sensory that is seated on the seat 19 less than the distance that has acceleration transducer 5 ' to exist, and the exterior contour hardness of acceleration transducer 5 ' is high more, and seat cushion filler 16 is soft more, and this is just long more apart from r.Present embodiment is that (with vibration detection device 5) is fixed on the cushion spring 17 of seat cushion filler 16 belows, but because of cushion spring 17 generally is to constitute with metal wire rod, so the structure that imperceptible this cushion spring 17 of the people that takes one's seat is existed has been made at seat 19, so long as hardness is identical, and its shape does not have obvious projection, is fixed on the cushion spring 17 with this, just can not arrived by human body sensory, can not influence the comfort of taking one's seat, can be arranged on this fixed position.
Fig. 5 is the cutaway view of acceleration transducer 5 '.As shown in the figure, acceleration transducer 5 ' by the supporting station 23 of beam portion 22, backbar portion 22, be arranged on resistive element 24 in the beam portion 22, the terminal 25 that is electrically connected with the two ends of resistive element 24, pedestal 26, the housing 27 of protection aforementioned structure thing and the liquid-filled material 28 that charges in housing 27 spaces of base plate that become these works constitute.In the present embodiment, this class acceleration transducer 5 ' is arranged on seat portion one side, 4 places and back-rest one side 4 places of cushion spring 17 as shown in Figure 3, amounts to 8 places, and the vibration of human body is detected.In addition, even acceleration transducer 5 ' only is located at a portion or only is located at the vibration of back-rest with human body, also can make it to bring into play necessary performance.
The below effect of explanation said structure.In case there is the people to be seated on the seat 19, its vibration just is delivered to through the top layer cloth 15 at seat 19 and seat cushion filler 16 to be vibrated on the cushion spring 17, this vibration is also vibrated the acceleration transducer 5 ' that is fixed on the cushion spring 17, be subjected to the acceleration of this vibration, be delivered on the resistive element 24 that is fixed on beam portion 22 surfaces after the vibration that beam portion 22 in the acceleration transducer 5 ' is subjected to sensor is exaggerated, the distortion that produces because of the vibration of beam portion 22 changes the resistance of resistive element 24.Even human body is in rest state, human body also can produce mild action because of breathing or heartbeat, and the vibration that this mild action caused also can make resistive element 24 that resistance variations take place through above-mentioned path.On resistive element 24, applied voltage from power supply 20 through resistance circuit 21 in advance, the resistance of resistive element 24 changes behind the acceleration that the vibration of cushion spring 17 causes in case acceleration transducer 5 ' is subjected to, the both end voltage of resistive element 24 just changes, this voltage change is amplified by the amplifying device 8 of signal processing apparatus 6, and filtered device 7 is filtered into necessary frequency content, again with outputing to judgment means 10 behind leveling device 9 levelings, and judge with judgment means 10 whether the someone takes one's seat on the seat 19.
Here used acceleration transducer 5 ' is to amplify vibration with beam portion 22; and in order also to detect weak vibration; in the part of beam portion 22 groove 29 is set; beam portion 22 is vibrated easily; but so can weaken the intensity of beam portion 22; so, housing 27 must be made firm structure in order to protect beam portion 22 to avoid the impact that when having the people to take one's seat, applies from the outside.Therefore, if it is arranged on the position of close top layer cloth 15, can make the people that takes one's seat produce the difference sense, the comfortableness that influence is taken one's seat, so traditional structure can not be located near the top layer cloth 15, but present embodiment is on the cushion spring 17 that is fixed in apart from top layer cloth 15 certain distance r, so can not influence the comfort of taking one's seat.In this occasion, owing to certain distance r is arranged apart from top layer cloth 15, so the vibration that is applied on the acceleration transducer 5 ' is also less, but because of its shape and material can influence the comfort of taking one's seat hardly, so acceleration transducer 5 ' is bigger in the flexibility of configuration aspects, can waits by increase resistive element 24 and improve sensitivity, like this, just can obtain enough sensitivity, also can human body even keep clear of top layer cloth 15.In addition, present embodiment not only is provided with slot part 29 in beam portion 22, and also the front end in beam portion 22 is provided with counterweight 30, to improve the sensitivity of acceleration transducer 5 '.
As mentioned above, the present invention is that degree of will speed up sensor 5 ' is fixed on the vibration that comes human body with the part at seat 19 more than the face certain distance, so but increased acceleration sensor 5 ' is in the flexibility of configuration aspects, so just can take the measure of various raising sensitivity to acceleration transducer 5 ', and less for the influence of the comfort of taking one's seat, the human body detection device of reliable detection human body can be provided.
In addition, as mentioned above, the present invention is that degree of will speed up sensor 5 ' is fixed on the cushion spring 17 that is in seat cushion filler 16 belows, but because cushion spring 17 adopts metal system wire rod usually, the structure that the people that takes one's seat can not feel that this cushion spring 17 exists has been made at seat 19, so as long as the hardness of acceleration transducer 5 ' is identical with cushion spring, and be fixed on the cushion spring 17, just can not felt by human body.Thereby, as long as shape is suitable, there is not significantly projection, then nearly all acceleration transducer 5 ' can be arranged on this position and can not destroy the comfort of taking one's seat, and when degree of will speed up sensor 5 ' is installed on the seat cushion, can improve the flexibility of design.
An effect again of present embodiment is to protect acceleration transducer 5 ' by enough seat cushion fillers 16.For example, even 19 surface has liquid such as water or fruit juice unrestrained at the seat, or the cigarette of band fire drops, owing to seat cushion filler 16 is arranged every between itself and the seat surface, so the heat of moisture or cigarette is difficult for arriving acceleration transducer 5 ', can reduce destruction or fault that this class reason causes.
In addition, this example is as vibration detection device 5 with acceleration transducer 5 ', certainly except acceleration transducer, also can use physical change such as displacement that piezoelectric element etc. causes vibration or distortion to convert electric signal to, and so long as can improve the structure of sensitivity and all can adopt, be not to be the invention aim to limit vibration detection device 5.
Below in conjunction with description of drawings the present invention the 2nd embodiment.Fig. 6 is equipped with the sectional block diagram of the seat of present embodiment with the seat of human body detection device, and Fig. 7 is the calcspar of the seat of present embodiment with human body detection device.The difference of present embodiment and the 1st embodiment is that vibration detection device 5 is flexible piezoelectric element 5 ", and be arranged between seat cushion filler 16 and the cushion frame 18 and contact with seat cushion filler 16.Piezoelectric element 5 " be with piezoelectric such as polyvinyl fluoride fork (PVDF) shape that fries batter in a thin layer, and at its two sides evaporation metal electrode, polarize again and handle the back and protects it surperficial and be configured as band shape with the PET thin slice.In this occasion,, generally be by along piezoelectric element 5 though depend on the directionality of polarization " the thickness direction polarization, make piezoelectric element 5 " voltage output takes place for the tension variation of the length direction of band shape, present embodiment also is to use this structure.
On general seat, mostly as shown in Figure 6, be to adopt on cushion frame 18, directly to insert the simple structure that seat cushion filler 16 backs cover with top layer cloth 15.Again can human body on the seat 19 of no cushion spring 17 shown in Figure 3 for the influence comfort of taking one's seat neither, be that vibration detection device 5 is inserted in the seat cushion filler 16, or be fixedly installed on the surface of seat cushion filler 16, but general seat cushion filler 16 is easily because of the timeliness embrittlement, be bearing in rigid body on the seat cushion filler 16 impulsive force when taking one's seat through just not bearing human body behind the certain hour, cause seat cushion filler 16 to break easily, vibration detection device 5 is come off etc. from the fixed position of seat cushion filler 16.In order to solve this class problem, the vibration detection device 5 of present embodiment adopts flexible piezoelectric element 5 ", and be arranged between seat cushion filler 16 and the cushion frame 18 and contact with seat cushion filler 16.
The below effect of explanation said structure.In case there is the people on seat 19, to take one's seat, its vibration just is delivered to seat cushion filler 16 and produces vibration through the top layer cloth 15 at seat 19, this vibration makes and is arranged between seat cushion filler 16 and the cushion frame 18 and the piezoelectric element 5 that contacts with seat cushion filler 16 " vibration and distortion, and produce and the big or small correspondent voltage of vibrating.Even also can produce faint action when human body is in rest state because of breathing or heartbeat, the vibration that this faint action causes also through above-mentioned path produce with from piezoelectric element 5 " the magnitude of vibrations correspondent voltage.Here, piezoelectric element 5 " the flexible piezoelectric element of use; so can fit tightly, can detect the vibration of the seat cushion filler 16 that takes place in the gap minimum between seat cushion filler 16 and cushion frame 18 effectively and convert voltage to the surface of irregular seat cushion filler 16.In addition, even when the people is seated on the seat 19 and seat cushion filler 16 is deformed because of the pressure of human body, because piezoelectric element 5 " be flexible object; so can adapt to the distortion of seat cushion filler 16; be difficult for seat cushion filler 16 is applied excessive stress, so can prevent breaking of seat cushion filler 16.This piezoelectric element 5 " voltage that produces amplifies by the amplifying device 8 of signal processing apparatus 6; and be filtered into necessary frequency content by filter 7; by outputing to judgment means 10 behind leveling device 9 levelings, judge by judgment means 10 whether the someone takes one's seat on the seat 19 again.
As mentioned above, because the present invention uses flexible piezoelectric element 5 " as vibration detection device 5; even so the seat 19 of the pad spring of not choosing a place to give a banquet; also can too much influence not arranged to the comfort of taking one's seat; and can reduce the stress that concentrates on seat cushion filler 16 parts; even timeliness becomes fragile seat cushion filler 16, also seldom by piezoelectric element 5 " scratch.
Also have the piezoelectric element 5 as vibration detection device 5 uses of present embodiment " be to use laminar piezoelectric element, also have a kind of coaxial cable formula piezoelectric element that PVDF is processed into tubulose certainly, also it can be used as vibration detection device 5.In addition, also can be without piezoelectric element, get final product so long as have device flexible and that can detect vibration, deformeter that resistance just changes also can be realized the seat human body detection device with same structure in case for example use a kind of thin slice to deform.
Below in conjunction with description of drawings the present invention the 3rd embodiment.Fig. 8 is the stereogram of the seat of present embodiment with the vibration detection device of human detection, and Fig. 9 is to use the sectional block diagram at the seat of said apparatus.The difference of present embodiment and the 2nd embodiment is, vibration detection device 5 is arranged on the set shoestring 31 in seat cushion filler 16 belows at seat 19, the end 32,33 of shoestring 31 is fixed on the part of cushion frame 18, to apply tension force according to the load that is subjected to from seat cushion filler 16.Other structures are then identical with the 2nd embodiment, and the Therefore, omited describes in detail.In addition, the PET thin slice that the high elongation of present embodiment working strength is few is as shoestring 31.
The vibration detection device 5 usefulness piezoelectric element 5 identical here with the 2nd embodiment " constitute; certainly; so long as physical change such as displacement that vibration can be caused or distortion convert all can of electric signal to; for example small-sized acceleration transducer or deformeter etc., be not to be the invention aim to limit vibration detection device 5.And the vibration detection device 5 of present embodiment is also not necessarily leaveed no choice but have flexible.
Also have, be here with the PET thin slice as shoestring 31, also can use corrosion resistant plate or flexible carbon fiber etc. certainly, as long as have necessary intensity, and have flexiblely, then any material all can.
The below effect of explanation said structure.In case there is the people to take one's seat on seat 19, its vibration just is delivered to seat cushion filler 16 and produces vibration through the top layer cloth 15 at seat 19, and this vibration makes shoestring 31 also produce vibration.At this moment, because shoestring 31 is fixed on the part of cushion frame 18, can apply tension force according to the load that is subjected to from seat cushion filler 16, so the vibrational energy of seat cushion filler 16 is delivered to shoestring 31 reliably, simultaneously and piezoelectric element 5 " the seat cushion filler 16 that contacts and shoestring 31 both sides' vibration all be delivered to piezoelectric element 5 effectively " on.In case piezoelectric element 5 " vibrate and be out of shape, the big or small correspondent voltage with vibration just takes place.Even also can produce faint action when human body is in rest state because of breathing or heartbeat, the vibration that this faint action causes also through above-mentioned path produce with from piezoelectric element 5 " the magnitude of vibrations correspondent voltage.This piezoelectric element 5 " voltage that produces amplifies by the amplifying device 8 of signal processing apparatus 6; and be filtered into necessary frequency content by filter 7; by outputing to judgment means 10 behind leveling device 9 levelings, judge by judgment means 10 whether the someone takes one's seat on the seat 19 again.
As mentioned above, present embodiment is owing to be fixed on shoestring 31 part of cushion frame 18, to apply tension force according to the load that is subjected to from seat cushion filler 16, so the vibration of seat cushion filler 16 can be delivered to shoestring 31 reliably, simultaneously and piezoelectric element 5 " the seat cushion filler 16 that contact and shoestring 31 both sides' vibration can both be delivered to piezoelectric element 5 effectively " on, have the effect of raising sensitivity.
Again owing to be that vibration detection device 5 is arranged on the shoestring 31,, so just can increase the leeway of selection vibration detection device 5 so not necessarily to leave no choice but be flexual to vibration detection device 5.
Also have, the shoestring 31 of present embodiment is fixed on the cushion frame 18, as fixing means, can fixture be set at the two ends of shoestring 31, use Screw fastening again, or it is fixing by welding, but not only available this fixing means with certain intensity, also can adopt method of attachment with certain free degree, as end hook-shaped hooking part is set at shoestring 31, again hooking part is inserted in the hole on the cushion frame 18, get final product so long as be subjected to the structure that load applies tension force from seat cushion filler 16 by shoestring 31.
Below in conjunction with description of drawings the 4th embodiment of the present invention.Figure 10 is the stereogram of the seat of present embodiment with the vibration detection device of human body detection device, and Figure 11 is the sectional block diagram that the seat of this device is installed.The difference of present embodiment and the 3rd embodiment is, vibration detection device 5 has by with piezoelectric element 5 " fix with cushion frame 18 and to piezoelectric element 5 " apply the tension force applying unit 34,35 of tension force.Standing part between tension force applying unit 34,35 double as and the cushion frame 18 after being assembled into seat 19, because from the load of seat cushion filler 16 be fixed on cause on the cushion frame 18, will be at piezoelectric element 5 " on apply certain force of strain.Other structures are then identical with the 2nd embodiment, and the Therefore, omited describes in detail.
Adopt said structure, piezoelectric element 5 " two ends be fixed on the cushion frame 18 through overtension applying unit 34,35; so that when being sandwiched between seat cushion filler 16 and the cushion frame 18, be applied in certain force of strain; this be because; the piezoelectric element 5 of Shi Yonging herein " and the 2nd embodiment same, be tension variation generation voltage output, can bring into play its original performance more effectively length direction.In addition, this piezoelectric element 5 " be clipped between seat cushion filler 16 and the cushion frame 18; so the distortion that the friction between seat cushion filler 16 or seat cushion filler 16 and the cushion frame 18 can make its vibration cause is restricted; and can make piezoelectric element 5 by applying tension force " the distortion that causes of vibration be delivered to piezoelectric element 5 easily " integral body; even the very little quantity of electric charge that also can increase by this vibration generation of vibration has so just improved piezoelectric element 5 " sensitivity to vibrating.This piezoelectric element 5 " voltage that produces amplifies by the amplifying device 8 of signal processing apparatus 6; and be filtered into necessary frequency content by filter 7; by outputing to judgment means 10 behind leveling device 9 levelings, judge by judgment means 10 whether the someone takes one's seat on the seat 19 again.
As mentioned above, because the present invention is at flexible piezoelectric element 5 by tension force applying unit 34,35 " on apply tension force; so can give full play to piezoelectric element 5 " original piezoelectric property, even the friction between while and seat cushion filler 16 or the cushion frame 18 is restricted its vibration, also can increase the quantity of electric charge that vibration produces, can improve piezoelectric element 5 " to the vibration sensitivity.
In addition, even seat cushion filler 16 breaks, because piezoelectric element 5 " be fixed on the cushion frame 18 by tension force applying unit 34,35, can not misplace so be fixed on the correct position, can continue the vibration of human body.
In addition, because cushion frame 18 is by metal sheet forming, so the people that takes one's seat can not feel the existence of cushion frame 18, thereby, even at piezoelectric element 5 " on have tension force to apply; as long as it is arranged between seat cushion filler 16 and the cushion frame 18, the people is with regard to imperceptible piezoelectric element 5 almost " existence.
The foregoing description is the marginal portion that tension force applying unit 34,35 is fixed on cushion frame 18, tension force applying unit 34,35 can certainly be fixed on the jog on cushion frame 18 surfaces, or be fixed on the cushion spring 17 at seat of cushion spring 17.And fixing means both can be fastening with Screw with the marginal portion of tension force applying unit 34,35 and cushion frame 18, also can weld, can also adopt method of attachment with certain free degree, promptly hook-shaped hooking part is set in the end of tension force applying unit 34,35, again hooking part is inserted in the hole that is located on the cushion frame 18, in a word, so long as when sandwiching between seat cushion filler 16 and the cushion frame 18, be applied in certain force of strain, any method all can, be not to be the invention aim with the method to set up that limits vibration detection device 5.
Below in conjunction with description of drawings the present invention the 5th embodiment.The difference of present embodiment and the 4th embodiment is that as shown in figure 12, vibration detection device 5 has being applied to piezoelectric element 5 " on the tension force control part 36 that limits of tension force, to avoid at piezoelectric element 5 " on apply tension force above predetermined value.Other structures are then identical with above-mentioned the 4th embodiment, and the Therefore, omited describes in detail it.Wherein, tension force control part 36 usefulness sizes are than piezoelectric element 5 " long and draftability is less than piezoelectric element 5 " member such as corrosion resistant plate be shaped its end 38,39 and piezoelectric element 5 " two ends fix.The tension force applying unit 34,35 that end 38,39 and double as are fixed in the fixed part on the cushion frame 18 is configured as one.Tension force control part 36 is not limited to use corrosion resistant plate, also can be with the little resin flake of piano filament or draftability etc., and above-mentioned size and draftability require so long as can satisfy, also can be with the member of other materials or shape.
Adopt said structure, piezoelectric element 5 " two ends be fixed on the cushion frame 18 through overtension applying unit 34,35; so that when being sandwiched between seat cushion filler 16 and the cushion frame 18, be applied in certain force of strain; this be because; the piezoelectric element 5 of Shi Yonging herein " and the 2nd embodiment same, be tension variation generation voltage output, can bring into play its original performance more effectively length direction.In addition, this piezoelectric element 5 " be clipped between seat cushion filler 16 and the cushion frame 18; so the distortion that the friction between seat cushion filler 16 or seat cushion filler 16 and the cushion frame 18 can make its vibration cause is restricted; and can make piezoelectric element 5 by applying tension force " the distortion that causes of vibration be delivered to piezoelectric element 5 easily " integral body; even and the very little quantity of electric charge that also can increase of vibration by this vibration generation, so just improved piezoelectric element 5 " sensitivity to vibrating.This piezoelectric element 5 " voltage that produces amplifies by the amplifying device 8 of signal processing apparatus 6; and be filtered into necessary frequency content by filter 7; by outputing to judgment means 10 behind leveling device 9 levelings, judge by judgment means 10 whether the someone takes one's seat on the seat 19 again.Impulsive force when taking one's seat because of human body sometimes etc. makes at piezoelectric element 5 " on apply excessive tension force, and this excessive tension force is limited by tension force control part 36, can avoid at piezoelectric element 5 " on apply tension force above predetermined value.
In addition, adopt said structure, even at piezoelectric element 5 " on have excessive tension force to apply; because the corrosion resistant plate that is used for tension force control part 36 is that length is than piezoelectric element 5 " long draftability and than piezoelectric element 5 " little member; even so since tension force apply and make piezoelectric element 5 " stretch, can not be stretched to the length that exceeds tension force control part 36, piezoelectric element 5 yet " can not rupture.Length as for the corrosion resistant plate that is used for tension force control part 36, if establish piezoelectric element 5 " length be L; then for example according to tension test etc. to piezoelectric element 5 " yield point on the investigation of stretching Δ L show, as long as be set in that L is above, scope that the length after L and the Δ L addition is following is interior.
The 4th embodiment is at piezoelectric element 5 " on apply tension force improving sensitivity, but impulsive force that like this can be when for example taking one's seat is at piezoelectric element 5 " on apply the hightension of crossing yield point more than, cause piezoelectric element 5 " sensitivity decline, or rupture.Yet, as mentioned above, because present embodiment is applied to piezoelectric element 5 by 36 pairs of tension force control parts " on tension force control; to avoid at piezoelectric element 5 " on apply tension force above predetermined value, so above-mentioned piezoelectric element 5 can not take place " sensitivity descends or the problem of fracture the life-span that can improve the intensity aspect.
As mentioned above, tension force control part 36 usefulness sizes are than piezoelectric element 5 " long, draftability is than piezoelectric element 5 " little component forming, can come being applied to piezoelectric element 5 with simple inexpensive structure " on tension force carry out control.
The tension force control part of above-mentioned the 5th embodiment is than piezoelectric element 5 with size " long, draftability is than piezoelectric element 5 " little component forming, its two ends and piezoelectric element 5 " two ends fix; certainly also can be as the 6th embodiment of the present invention; as shown in figure 13, tension force control part 36 adopts piezoelectric element 5 " elastomer such as helical spring 40,41 shapings that are connected with cushion frame 18.In Figure 13 a, end 42,43 and a piezoelectric element 5 of helical spring 40,41 " two ends fix, 44,45 of the other ends are fixing with the tension force applying unit 34,35 that double as is fixed on the fixed part on the cushion frame.Obtain to the spring constant testability of helical spring 40,41, for example available piezoelectric element 5 " the following tension force of yield point select the spring constant that stretches easily.
Also have, as long as the scope of be used among the 3rd embodiment that the length L 1 of the corrosion resistant plate of tension force control part 36 is set in that L is above, the length after L and the Δ L addition is following is interior, but at piezoelectric element 5 " use certain member and make the less occasion of Δ L, when being shaped, L1 needs high dimension precision.Yet, as long as use above-mentioned helical spring 40,41,,, be applied to piezoelectric element 5 so can alleviate because helical spring 40,41 stretches even there was hightension to apply " on tension force.In this occasion, the shaping of helical spring 40,41 does not need too high dimensional accuracy.Thereby the simple more inexpensive structure of available ratio the 5th embodiment is to being applied to piezoelectric element 5 " on tension force control.
In addition, the elastomer that is used for tension force control part 36 is not limited to helical spring, and members such as also available leaf spring or rubber are as long as meet above-mentioned elastic condition.
In addition, present embodiment is at piezoelectric element 5 " two ends the tension force control part is set, also can only be provided with at one end certainly.
In addition, 2nd, the 3rd, the 4th, the 5th, the 6th embodiment is applicable to the seat of no cushion spring 17, also can use the vibration detection device 5 with tension force applying unit 34,35 or tension force control part 36 on the seat that cushion spring 17 is arranged described in the 1st embodiment certainly.In addition, vibration detection device 5 be arranged on cushion frame 18 laterally, also can be arranged on certainly cushion frame 18 vertically, or be provided with a plurality ofly, also can be arranged on the back-rest.
In addition, 2nd, the vibration detection device 5 of the 4th, the 5th, the 6th embodiment is with flexual piezoelectric element 5 " constitute, can certainly will use the deformeter of flexible electrical resistance body or not have flexual pottery and neutralize electric device and be rolled into one with the flexible resin(a) thin slice and make it to have pliability.That is, so long as can be by applying tension force with electric signal amplify back output all can, be not to be the invention aim to limit vibration detection device 5.
Below in conjunction with description of drawings the 7th embodiment.Figure 15 is the stereogram of the seat of present embodiment with the vibration detection device 5 of human body detection device, and vibration detection device 5 is by flexual piezoelectric element 5 " and buffering member 47 formations, piezoelectric element 5 " have pliability and be fixed on the surface of buffer component 47.In addition, Figure 14 is seat that present embodiment the is installed cutaway view with the seat 19 of human body detection device, the piezoelectric element 5 of vibration detection device " together be fixed on the bottom surface of seat cushion filler 16 of the seat surface at seat 19 with buffer component 47 with tight state of contact.Figure 16 is the calcspar of the seat of present embodiment with human body detection device, and the seat of present embodiment is installed on the seat of automobile with human body detection device.
Adopt said structure, vibration detection device 5 is by piezoelectric element 5 " and buffering member 47 constitute; piezoelectric element 5 " be clipped between buffer component 47 and the seat cushion filler 16 and be fixed on the seat cushion filler 16, so can bear human body vibration effectively from seat surface, on the other hand, for useless vibration from cushion frame 18, since with buffer component 47 with piezoelectric element 5 " covered; even so when having the people to take one's seat piezoelectric element 5 " be sandwiched in seat cushion filler 16 and support between the cushion frame 18 of seat cushion filler 16 and be squeezed, owing to being cushioned member 47, the vibration from beyond the seat surface of transmitting from cushion frame 18 absorbs, so be difficult for being delivered to piezoelectric element 5 ", piezoelectric element 5 " just can be accepted as the necessary vibration of human body on the detection seat 19 selectively from seat surface.
In order to accept vibration effectively from seat surface, piezoelectric element 5 " bottom surface of preferably being close to seat cushion filler 16 installs; thereby; the material that the material of buffer component 47 preferably can absorb vibration and can adapt to complicated shape obediently, be convenient to be close to; changes shape and comprehensively be close to the flexibility polyurethane of the seat cushion filler bottom surface of the seat surface many, that surface configuration is complicated that rises and falls easily easily for example, or cementability is poor slightly but felt that low-cost broken cotton pinprick forms etc.But, which kind of material no matter, its hardness all can have influence on the difficulty or ease that vibration is transmitted, so preferably according at piezoelectric element 5 " on installation direction or the structure employing hardness of buffer component 47 and the material that service condition adapts most.
In addition, with buffer component 47 with seat cushion filler 16 fixedly the time, use the sort of can not make from 16 transmission of seat cushion filler from the vibration attenuation on the seat surface at seat 19, as thin as a wafer double-sided belt or bonding after the bonding agent that can not harden very effective.
Also have, be installed in method on the seat cushion filler 16 as vibration detection device with present embodiment, certainly be earlier at the bottom surface of seat cushion filler 16 sticking piezoelectric element 5 "; paste buffer component 47 more thereon; if but in advance with piezoelectric element 5 " be fixed on the surface of buffer component 47, again the vibration detection device 5 of this formation one is sticked on the bottom surface of seat cushion filler 16 as a unit, adopt this method.Just needn't manage piezoelectric element 5 more respectively in assembling during seat body " or buffer component 47 these class findings, and all can increase flexibility for assembling place or built-up time, can realize the operation rationalization.
In addition, present embodiment is that the seat is installed on the automobile seat with human body detection device, shown in the calcspar of Figure 16, it is by vibration detection device 5, from the output of vibration detection device 5, take out a plurality of filters 71 of the frequency signal that has nothing in common with each other as signal processing apparatus 6,72 ... 7n, according to these filters 71,72 ... the output of 7n and judge the judgment means 10 whether people is arranged on the seat 19, according to the judgement of judgment means 10 output device 46 that signal outputs to the external connection apparatus (not shown) that moves with the judgement of human body detection device at seat according to the present invention is constituted, from the corresponding signal of vibration that detects with vibration detection device 5, take out the eigentone composition of human body from wave filter (1) 71 to wave filter (n) 7n or because of the travel vibration frequency composition that vibrates and export of vehicle to judgment means 10.
Use 10 couples of people's of judgment means of human body detection device judgement as for the seat of present embodiment, under the vibration environment of automobile etc., human body on the seat 19 be personnel selection intrinsic vibration frequency vibration, so except the vibration component of automobile, also take place this people intrinsic vibration component, above-mentioned judgment means 10 has been utilized this point just, when having the people to exist on the seat 19, the output of wave filter (1) 71 of taking out people's eigentone ingredient f 1 is equal to or greater than the output of the wave filter (2) 72 of the vibration frequency ingredient f 2 of taking out automobile, on the contrary, when exist on the seat 19 be article such as luggage the time, the output of the wave filter (1) 71 of taking-up people's intrinsic frequency ingredient f 1 just diminishes, the output of the filtering (2) 72 of the vibration frequency ingredient f 2 of taking-up automobile is no change then, so just can judge on the seat 19 it is also people's article in addition of people by the output size of understanding both.Also have, in 3Hz arrived the scope of 10Hz, on the other hand, the vibration frequency of automobile was often about it, so for both are distinguished, effective method is to adopt the bandpass filter of band width to be set as filter 7 usually for people's vibration frequency composition.
Below in conjunction with description of drawings the 8th embodiment of the present invention.Among Figure 17, (a) being the cutaway view that the seat of vibration detection device of the present invention is installed, (b) is that part of stereogram that vibration detection device is installed on the seat.In the present embodiment used seat 19 be seat cushion filler 16 is bearing on the cushion frame 18 and with cushion spring 17 that cushion frame 18 is connected on.
As shown in figure 17, present embodiment is also same with the 7th embodiment, vibration detection device 5 is by flexual piezoelectric element 5 " and buffering member 47 formations; piezoelectric element 5 " be fixed on the buffer component 47, and buffer component 47 be fixed with piezoelectric element 5 " the side and piezoelectric element 5 " together the bottom with seat cushion filler 16 contact, and be fixed on the cushion spring 11 that is connected with the cushion frame 10 that supports seat cushion filler 16.
Adopt said structure, though the piezoelectric element 5 of vibration detection device 5 " contact with seat cushion filler 16; when the people takes one's seat; owing to be subjected to the pressure of human body; seat cushion filler 16 and piezoelectric element 5 " closely contact, be subjected to vibration easily, in addition from the seat surface at seat 19, vibration beyond the seat surface at the seat 19 that cushion spring 17 transmits is cushioned member 47 absorptions, is difficult for being delivered to piezoelectric element 5 ".On the other hand, when on seat 19, not having whatever or placing light thing, though seat cushion filler 16 and piezoelectric element 5 " contact; because of pressure little; so almost not from the vibration transmission of the seat surface at seat 19, to piezoelectric element 5 " vibration component of the automobile that just transmits from cushion spring 17 mostly of the vibration of transmitting.Thereby, have man-hour people's vibration can be transmitted more strongly, nobody the time then the vibration of automobile is transmitted more strongly, so have the people nobody the time signal difference that obtains very big, can realize highly sensitive seat human body detection device.
In addition, when being installed to vibration detection device 5 on the cushion spring 17, needn't be close to cushion spring 17, and because cushion spring 17 often constitutes with wire rod, there is not the plane, so fix with bonding agent or double-sided belt with it, fix not as a plurality of positions of buffer component 47 being sandwiched cushion spring 17 backs with C word ring etc., can firmly fix more in this way.
In addition, present embodiment is that vibration detection device 5 is fixed on the cushion spring 17, also can obtain same effect if still be fixed on the cushion frame 18 that supports cushion spring 17.Thereby the seat of present embodiment only also is suitable for human body detection device and uses the seat of cushion spring 17 or the seat of the pad spring 17 of not choosing a place to give a banquet fully in the part at seat, all has identical effect.
Below in conjunction with description of drawings the 9th embodiment of the present invention.Figure 18 is equipped with the cutaway view of the seat of present embodiment with the seat of human body detection device, and Figure 19 is the stereogram and the cutaway view of the vibration detection device of this device.
As Figure 18 and shown in Figure 19, in the present embodiment, be provided with recess 48 on the surface of buffer component 47, fixing flexible piezoelectric element 5 on the opposite side of the one side with being provided with recess 48 of buffer component 47 with on the position of recess subtend " as vibration detecting part, buffer component 47 be fixed with piezoelectric element 5 " the side and piezoelectric element 5 " together be attached on the bottom surface of seat cushion filler 16.
Adopt said structure, because the piezoelectric element 5 of vibration detection device 5 " be fixed on the bottom surface of seat cushion filler 16, so acceptant vibration from the bottom surface.In addition, same with the 7th embodiment of the present invention, owing to covered piezoelectric element 5 with buffer component 47 "; so when the people takes one's seat; even by cushion frame 18 extruding of seat cushion filler 16 and supporting seat cushion filler 16; transmit vibration beyond the seat surface at the seat 19 that comes from cushion frame 18 and also can be cushioned member 47 and absorb, and be difficult for being delivered to piezoelectric element 5 ", so piezoelectric element 5 " just can be accepted as the necessary vibration of human body on the detection seat 19 selectively from seat surface.Also have, the seat of present embodiment is being fixed with piezoelectric element 5 with human body detection device because of buffer component 47 " the back side of one side be provided with recess 48, so between buffer component 47 and cushion frame 18, just form the space.Because this space is in and is fixed on piezoelectric element 5 on the buffer component 47 " position of subtend; so piezoelectric element 5 " vibrate because of the vibration that passes over from seat surface, and can not be subjected to the obstruction of cushion frame 18 and 47 pairs of vibration action of buffering member, and just can be from piezoelectric element 5 " vibration of output and seat surface large-signal more accordingly.
In addition, the seat of present embodiment with human body detection device on, the recess peripheral part 47A that is provided with recess 48 one side of the buffer component 47 of Figure 19 constitutes with the material that hardness is lower than other parts of buffer component, so hardness low part can absorb vibration not to the high part transmitting vibrations of hardness, event can be convenient to absorb vibration more, makes from the seat surface useless vibration in addition at the seat 19 that the cushion frame 18 of supporting seat cushion filler 16 is transmitted to be difficult for being delivered to piezoelectric element 5 ".
Also have, adopt said structure, part except buffer component 47 is provided with recess 48 recess peripheral part 47A simultaneously all is the high and difficult absorption vibration of hardness, so the vibration that will be subjected to is easily transmitted, even at piezoelectric element 5 " the direct position of seat cushion filler 16 of contact not; as long as contact with buffer component 47, transmission will take place and buffer component 47 is vibrated in the vibration of seat cushion filler 16, and can transfer vibrations to the piezoelectric element 5 that is fixed on the buffer component 47 ".
Buffer component 47 with present embodiment of above-mentioned effect is made up of 2 members, one is to establish squared-shaped passthrough openings in plane sponge central authorities, it becomes recess peripheral part 47A of buffer component 47, another is the plane buffer component that hardness is higher than recess peripheral part 47A, the two is bonding, just constituted buffer component simply, had recess 48 on it, and recess peripheral part 47A is also lower than the hardness of the opposite one side that is provided with recess 48 one sides.
In addition, be that recess 48 is set in the present embodiment, also the through hole that runs through buffer component 47 can be set certainly.But,, need the supporting and the fixing part of vibration detection device 5, though shape is restricted, only need that perforate get final product on planar materials, so it is also simple to compare the structure that forms recess in the latter's occasion.Also have, present embodiment is that bigger recess 48 is set at a place, and a plurality of less recesses 48 also can be set certainly.Occasion the latter, by recess 48 and recess 48 are arranged on piezoelectric element 5 " under; the part of the buffer component 47 between the recess 48 supports piezoelectric element 5 with regard to becoming beam ", and can make piezoelectric element 5 " be close to more on the seat cushion filler 16, can improve sensitivity for vibration.Can also prevent piezoelectric element 5 " peel off from seat cushion filler 16, so the long-term piezoelectric element 5 that uses " also can not peel off from seat cushion filler 16, can reduce fault.Certainly also can connect at this occasion recess 48.In addition, also through hole and recess many groups can be constituted, identical effect can be obtained.
In addition, present embodiment is recess 48 to be set and to constitute recess peripheral part 47A with the lower material of hardness, certainly also can not establish recess 48, and just with buffer component 47 be fixed with piezoelectric element 5 " the opposite side of one side all be lower than with hardness be fixed with piezoelectric element 5 " the material of the side constitute, so also can make the useless vibration component decay that comes from cushion frame 18 transmission, can make piezoelectric element 5 " be accepted as selectively and judge that there is the vibration of necessary seat surface from seat 19 in human body.
In addition, present embodiment is with 2 kinds of bonding formation buffer components of sheet material that hardness is different, can certainly change frothing percentage on expanded material top ground, make to be fixed with piezoelectric element 5 " one side different with the hardness of its opposite one side, so also can obtain identical effect.In addition, also be not limited to this expanded material, so long as on a kind of material, can all can obtain identical effect by the local any material that changes the complexity of transmitting vibrations.Also have, the occasion adopting expanded material can obtain shape arbitrarily with finishing die, and the shaping of the complexity shaping of recess 48 or the buffer component 47 corresponding with the shape of seat cushion filler 16 all is easy to carry out.In addition, can be not yet by being shaped, but with airtight a plurality of little air bag, and they are interconnected to constitute buffer component, or put in for example bigger frame of people or in the bag, and form and neither interconnect and unseparated buffer component, can adapt to different shape too.
Also have, present embodiment is that buffer component 47 is fixed on the cushion spring 17 that is supported on the cushion frame 18, also can directly be fixed on certainly on the cushion frame 18, also can bring into play same effect on the seat of pad spring 17 of not choosing a place to give a banquet.
In addition, in the 7th, the 8th, the 9th embodiment, vibration detection device 5 be arranged on cushion frame 18 laterally, also can be arranged on certainly cushion frame 18 vertically or be provided with a plurality ofly, or be arranged on the back-rest.
In addition, in the 7th, the 8th, the 9th embodiment, vibration detection device is by flexible piezoelectric element 5 " constitute, can certainly use deformeter, or a no flexible pottery is neutralized electric device to be bundled into one with the pliability resin flake and to make it to have pliability with flexible electrical resistance body.Furthermore, as long as can solve for the ability of following, the sensitivity of the shape at seat 19 and the problem of the comfort of taking one's seat, not having flexual material also can use, every any material that the vibrational energy that applies is transformed into electric signal all can use, and is not to be aim of the present invention to limit vibration detection device 5.
Also have, in the above-described embodiments, be as the seat of seat of the present invention with human body detection device is housed with automobile seat, but it is just as the typical case that is in the seat under the vibration environment, every seat that is under the vibration environment can use, for example the operation of train seat or factory is with the seat etc., even but under common environment, near have the people to walk about also can to apply vibration to vibration detection device, the present invention just can provide the seat human body detection device that can not cause the flase drop survey because of these vibrations, is not particularly limited under vibration environment and uses.In a word, be not to be aim of the present invention to limit seat purposes etc.
The possibility of industrial utilization
As mentioned above, can obtain following effect with human body sensor for seat of the present invention.
That is, vibration detection device is arranged on the part at aforementioned seat and comes the vibration of human body, and can not make the people Feel its existence, thus can provide can increase consist of the vibration detection device free degree, for the comfort of taking one's seat Impact less and can reliable detection the human body detection device of human body. In addition, fill out owing to being provided with the seat surface seat cushion Material is avoided from the excessive pressure of seat surface with the protection vibration detection device and is sprinkled upon liquid or perfume (or spice) on the seat surface The impact of cigarette heat is so can provide fault few human body sensor for seat.
In addition, because the output signal that signal processing apparatus has vibration detection device is divided into frequency content not A plurality of filters of exporting behind a plurality of signals together are so can provide vibrations such as namely being used in automobile seat Also can be under the prerequisite that does not affect the comfort of taking one's seat under the environment seat human detection of human body reliably Device.
In addition, because vibration detection device is fixed on the seat spring, so as long as shape is suitable, institute almost The checkout gear that has can both be arranged on this position under the prerequisite that does not affect the comfort of taking one's seat, can will vibrate inspection When being located at seat cushion, further improves in the survey device free degree of design.
In addition, because vibration detection device is contacted setting with the bottom surface of seat cushion filler, so even do not choose a place to give a banquet The seat cushion of pad spring can not affect the comfort of taking one's seat yet, as long as and be attached to the back side of seat cushion filler, So the human body sensor for seat that can easily be installed on the seat can be provided.
In addition, be fixed with shoestring in the part of cushion frame, to produce and load phase from the seat cushion filler The tension force of answering so the vibrational energy of seat cushion filler is delivered to shoestring reliably, connects with vibration detection device simultaneously The seat cushion filler that touches and shoestring both sides' vibration can both pass to vibration detection device effectively, can provide high The human body sensor for seat of sensitivity.
In addition, be fixed with shoestring in the part of cushion spring, to produce and load phase from the seat cushion filler The tension force of answering so the vibrational energy of seat cushion filler is delivered to shoestring reliably, connects with vibration detection device simultaneously The seat cushion filler that touches and shoestring both sides' vibration can both pass to vibration detection device effectively, can provide high The human body sensor for seat of sensitivity.
In addition, owing to apply tension force by the tension force applying unit at piezoelectric element, so can give full play to piezoelectricity The piezoelectric property that element is original, though simultaneously because of and seat cushion filler or cushion frame between friction it is shaken Moving being restricted, also transmitting vibrations effectively improves piezoelectric element for the sensitivity of vibration, can carry For highly sensitive human body sensor for seat.
In addition, the tension force control part limits the tension force that is applied on the piezoelectric element, is scheduled to avoid surpassing The tension force of value is applied on the piezoelectric element, so can the impulsive force when taking one's seat not cause excessive tension force to be applied to On the piezoelectric element and make the piezoelectric element sensitivity or break, can provide high sensitivity and fault few seat The position human body detection device.
In addition, the little member of draftability forms than piezoelectric element is long by size owing to the tension force control part, so can With simple inexpensive structure the tension force that is applied on the piezoelectric element is controlled, can provide high sensitivity and The few human body sensor for seat of fault that piezoelectric element breaks etc.
In addition, owing to the elastomer structure of tension force control part by connection piezoelectric element and cushion frame or cushion spring Become, need not too high dimensional accuracy so be shaped, available simpler inexpensive structure is to being applied on the piezoelectric element Tension force the few seat human body of fault that can provide high sensitivity and piezoelectric element to break etc. is provided Checkout gear.
In addition, vibration detection device is made of vibration detecting part and buffer component, and vibration detecting part is clipped in seat cushion Between the bottom surface and buffer component of filler, thus from cushion frame etc. transmit from the nothing beyond the seat surface at seat Just be cushioned with vibration and pass to vibration detection device after member absorbs, make the vibration detection device can be selectively Be accepted as the necessary vibration from seat surface of human body that detects on the seat, can provide and be convenient to be installed in the seat Go up and the good human body sensor for seat of sensitivity.
In addition, vibration detection device is made of vibration detecting part and buffer component, and vibration detecting part is fixed on slow Rush on the member, the one side that is fixed with vibration detection device of buffer component connects with the bottom surface of the seat cushion filler at seat Touch and fixing, so easily vibration detection device is installed on the seat, in addition, transmit from cushion frame etc. Be cushioned from the useless vibration beyond the seat surface at seat and pass to vibration detection device after member absorbs, make and shake Motion detection device can be accepted as the necessary vibration from seat surface of human body that detects on the seat selectively, can Be convenient to be installed on the seat and the good human body sensor for seat of sensitivity to provide.
In addition, vibration detecting part is fixed on the surface of buffer component, and the vibration detection that is fixed with of buffer component fills The one side of putting contacts with the bottom surface of the seat cushion filler at seat, is fixed on simultaneously the cushion frame of supporting seat cushion filler Or with cushion spring that cushion frame is connected on, so easily vibration detection device is installed on the seat, in addition Outward, the signal difference that can increase when on the seat people being arranged and transmit when not having whatever on the seat can provide Be convenient to be installed on the seat and the good human body sensor for seat of sensitivity.
Because buffer component has the space that vibrates for vibration detecting part, do not fill out so can not hinder from seat cushion again The vibration of the vibration detecting part that the human body vibration that material passes over causes, and pass over from cushion frame Be not directly passed to vibration detecting part from the useless vibration beyond the seat surface yet, but be cushioned the space of member Transmit after the decay, so the human body that vibration detection device can be accepted as on the detection seat selectively is necessary next From the vibration of seat surface, can provide highly sensitive human body sensor for seat.
Because the surface of buffer component has recess, vibration detecting part is fixed on and is provided with the opposite of recess one side again On the face with the position of recess subtend on, and the one side that is fixed with vibration detecting part and the vibration detection of buffer component Section together contacts with the seat cushion filler at seat, so can not hinder the human body vibration that passes over from the seat cushion filler to draw The vibration of the vibration detecting part that rises, and from cushion frame pass over from the useless vibration beyond the seat surface Be not directly passed to vibration detecting part yet, but be cushioned rear transmission of recess decay of member, so vibration detection Device can be accepted as the necessary vibration from seat surface of human body that detects on the seat selectively, can provide Highly sensitive human body sensor for seat.
Have through hole owing to buffer component again, vibration detecting part covers the through hole of aforementioned buffer component, so Can not hinder the vibration of the vibration detecting part that the human body vibration that passes over from the seat cushion filler causes, and from seat The useless vibration from beyond the seat surface that the pad framework passes over is not directly passed to vibration detecting part yet, but Vibration detection device is cushioned rear transmission of through hole decay of member, so can be accepted as the detection seat selectively On the necessary vibration from seat surface of human body, can provide highly sensitive seat to fill with human detection Put.
Again because buffer component has a plurality of spaces in the part of vibration detecting part vibration-generating, so can not hinder The vibration of the vibration detecting part that the human body vibration that passes over from the seat cushion filler causes, and pass from cushion frame The useless vibration from beyond the seat surface of passing is not directly passed to vibration detecting part yet, but is cushioned structure Vibration detection device transmits after a plurality of space attenuations of part, so can be accepted as the people who detects on the seat selectively The necessary vibration from seat surface of body can provide highly sensitive human body sensor for seat. And Partly to support vibration detecting part with the buffer component between a plurality of spaces, so vibration detecting part can be from seat Peel off on the pad filler, can provide fault few human body sensor for seat.
Again because the structure of buffer component is inhomogeneous, with the one side of vibration detection device contact than an opposite face Easily absorb vibration, so the useless vibration from beyond the seat surface that passes over from cushion frame just is cushioned member Easy absorption vibration partially absorb and decay after pass to again vibration detection device, so vibration detection device Can be accepted as selectively the necessary vibration from seat surface of human body that detects on the seat, can provide sensitive Spend high human body sensor for seat.
Again because buffer component at least with material different more than 2 kinds formation, and is fixed with vibration detection device The material of one side is than the easier absorption vibration of the material of opposite one side, from cushion frame pass over from seat Useless vibration beyond the face be cushioned member easy absorption vibration partially absorb and decay after pass to again Vibration detection device is so the human body that vibration detection device can be accepted as on the detection seat selectively is necessary From the vibration of seat surface, can provide highly sensitive human body sensor for seat.
Consist of with expanded material owing to buffer component again, and be fixed with the foaming density of vibration detection device one side Foaming density than opposite one side is little, from cushion frame pass over from the useless vibration quilt beyond the seat surface The easy absorption vibration of buffer component partially absorb and decay after pass to again vibration detection device, so vibration Checkout gear can be accepted as the necessary vibration from seat surface of human body that detects on the seat selectively, can Highly sensitive human body sensor for seat is provided.
Again because buffer component consists of and the one side that contacts with vibration detection device ratio with the different material of hardness The hardness height of opposite one side, the useless vibration from beyond the seat surface that passes over from cushion frame is cushioned structure The easy absorption vibration of part partially absorb and decay after pass to again vibration detection device, so the vibration detection dress Put and to be accepted as selectively the necessary vibration from seat surface of human body that detects on the seat, spirit can be provided The human body sensor for seat that sensitivity is high.

Claims (24)

1. seat human body detection device, it is characterized in that, the signal processing apparatus of handling by the vibration detection device that the vibration at the human body of taking one's seat on the seat is detected, to the output of described vibration detection device, judge according to the output of described signal processing apparatus and to have or not the judgment means of human body to constitute on the described seat that described vibration detection device is arranged on order and sits in certain at described seat that human body on the described seat can not felt its existence.
2. seat according to claim 1 human body detection device is characterized in that, the output signal that signal processing apparatus has vibration detection device is divided into a plurality of filters of exporting behind the different a plurality of signals of frequency content.
3. seat according to claim 1 human body detection device is characterized in that the seat has cushion spring, and vibration detection device is fixedly installed on the described cushion spring.
4. seat according to claim 1 human body detection device is characterized in that the seat has the seat cushion filler, and vibration detection device contacts with described seat cushion filler bottom surface.
5. seat according to claim 1 human body detection device, it is characterized in that, the seat has the cushion frame of seat cushion filler and this seat cushion filler of supporting, vibration detection device is arranged on the set shoestring in described seat cushion filler below, and described shoestring is by being connected with described cushion frame and applying tension force according to the load from described seat cushion filler.
6. seat according to claim 1 human body detection device, it is characterized in that, the seat has the cushion spring of seat cushion filler and this seat cushion filler of supporting, vibration detection device is arranged on the set shoestring in described seat cushion filler below, and described shoestring is by being connected with described cushion spring and applying tension force according to the load from described seat cushion filler.
7. seat according to claim 4 human body detection device, it is characterized in that, the seat has the cushion frame of supporting seat cushion filler, vibration detection device is made of the tension force applying unit that produces the piezoelectric element of electric charge by external force and apply tension force on described piezoelectric element, and described tension force applying unit applies on described piezoelectric element by described piezoelectric element is connected with described cushion frame and from the corresponding tension force of the load of described seat cushion filler.
8. seat according to claim 4 human body detection device, it is characterized in that, the seat has the cushion spring of supporting seat cushion filler, vibration detection device is made of the tension force applying unit that produces the piezoelectric element of electric charge by external force and apply tension force on described piezoelectric element, described tension force applying unit apply on described piezoelectric element by described piezoelectric element is connected with described cushion spring with from the corresponding tension force of the load of described seat cushion filler
9. according to claim 7 or 8 described seat human body detection devices, it is characterized in that vibration detection device has the tension force control part that the tension force that is applied on the piezoelectric element is limited.
10. seat according to claim 9 human body detection device is characterized in that, the tension force control part is longer than piezoelectric element by size and draftability is formed less than the member of described piezoelectric element, and its two ends are connected with the two ends of described piezoelectric element.
11. seat according to claim 9 human body detection device is characterized in that, the tension force control part is made of the elastomer that the end with piezoelectric element is connected with cushion frame.
12. seat according to claim 9 human body detection device is characterized in that, the tension force control part is made of the elastomer that the end with piezoelectric element is connected with cushion spring.
13. seat according to claim 4 human body detection device, it is characterized in that, the vibration detecting part of electric signal is exported in the vibration that vibration detection device is subjected to by basis and the padded coaming that the vibration that is subjected to is absorbed constitutes, and described vibration detecting part is clipped between seat cushion filler bottom surface and the described padded coaming.
14. seat according to claim 13 human body detection device, it is characterized in that, vibration detecting part is fixed on the surface of padded coaming, and the one side that is fixed with described vibration detecting part of described padded coaming together is fixed on seat cushion filler bottom surface with described vibration detecting part.
15. seat according to claim 13 human body detection device, it is characterized in that, the seat has the cushion frame of supporting seat cushion filler, vibration detecting part is fixed on the surface of padded coaming, the one side that is fixed with described vibration detecting part of described padded coaming is arranged to make described vibration detecting part and described seat cushion filler state of contact, is installed in simultaneously on the described cushion frame.
16. seat according to claim 13 human body detection device, it is characterized in that, the seat has the cushion spring of supporting seat cushion filler, vibration detecting part is fixed on the surface of padded coaming, the one side that is fixed with described vibration detecting part of described padded coaming is arranged to make described vibration detecting part and described seat cushion filler state of contact, is installed in simultaneously on the described cushion spring.
17., it is characterized in that padded coaming has for being fixed on the space that its surperficial vibration detecting part vibrates according to claim 13,14,15 or 16 described seat human body detection devices.
18. seat according to claim 17 human body detection device, it is characterized in that, the space is arranged on the recess of padded coaming one side, vibration detecting part is arranged on the one side opposite with described recess of described padded coaming and position described recess subtend, and the one side that is provided with described vibration detecting part of described padded coaming together contacts installation with the seat cushion filler bottom surface at seat with described vibration detecting part.
19. seat according to claim 17 human body detection device, it is characterized in that, the space is provided in a side of the through hole on the padded coaming, vibration detecting part covers described through hole, and the one side that is provided with described vibration detecting part of described padded coaming together contacts installation with the seat cushion filler bottom surface at seat with described vibration detecting part.
20., it is characterized in that the space is a plurality of spaces according to claim 17,18 or 19 described seat human body detection devices.
21. according to claim 13,14,15,16,17,18,19 or 20 described seat human body detection devices, it is characterized in that the structure of padded coaming is inhomogeneous, the one side that vibration detecting part contacted absorbs vibration easily than its opposite one side.
22. seat according to claim 21 human body detection device is characterized in that, padded coaming constitutes with the different materials more than at least 2 kinds, and the one side that vibration detecting part contacted adopts the material that absorbs vibration than its opposite one side easily.
23., it is characterized in that padded coaming is made of expanded material, and the foaming density of the one side that vibration detecting part contacted is less than its opposite one side according to claim 21 or 22 described seat human body detection devices.
24., it is characterized in that padded coaming constitutes with the different material of hardness, and the hardness of the one side that vibration detecting part contacted is higher than its opposite one side according to claim 21 or 22 described seat human body detection devices.
CN 96180448 1996-10-04 1996-10-04 Human body sensor for seat Expired - Fee Related CN1129385C (en)

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Application Number Priority Date Filing Date Title
CN 96180448 CN1129385C (en) 1996-10-04 1996-10-04 Human body sensor for seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 96180448 CN1129385C (en) 1996-10-04 1996-10-04 Human body sensor for seat

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CN1229343A true CN1229343A (en) 1999-09-22
CN1129385C CN1129385C (en) 2003-12-03

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012145937A1 (en) * 2011-04-27 2012-11-01 深圳市迈迪加科技发展有限公司 Method for monitoring cardiac function
CN103085718A (en) * 2009-09-28 2013-05-08 福特全球技术公司 A system for alerting a responsible party to the presence of an occupant in a passenger compartment of a vehicle
CN104554111A (en) * 2015-01-30 2015-04-29 无锡桑尼安科技有限公司 System of monitoring interior safety of vehicle stopped
CN104590183A (en) * 2015-01-30 2015-05-06 无锡桑尼安科技有限公司 Internal monitor system for safety under parking state
CN104590186A (en) * 2015-01-25 2015-05-06 无锡桑尼安科技有限公司 System for improving vehicle safety
CN112585504A (en) * 2018-09-19 2021-03-30 三井化学株式会社 Human body detection device, bed device and human body detection system

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
EP2437275B1 (en) 2009-05-29 2016-01-06 Fujikura, Ltd. Seat occupancy sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103085718A (en) * 2009-09-28 2013-05-08 福特全球技术公司 A system for alerting a responsible party to the presence of an occupant in a passenger compartment of a vehicle
WO2012145937A1 (en) * 2011-04-27 2012-11-01 深圳市迈迪加科技发展有限公司 Method for monitoring cardiac function
CN104590186A (en) * 2015-01-25 2015-05-06 无锡桑尼安科技有限公司 System for improving vehicle safety
CN104554111A (en) * 2015-01-30 2015-04-29 无锡桑尼安科技有限公司 System of monitoring interior safety of vehicle stopped
CN104590183A (en) * 2015-01-30 2015-05-06 无锡桑尼安科技有限公司 Internal monitor system for safety under parking state
CN112585504A (en) * 2018-09-19 2021-03-30 三井化学株式会社 Human body detection device, bed device and human body detection system

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