the present principles are directed to wearable sensors and the attachment of the same to clothing of a wearer . the present description illustrates the present principles . it will thus be appreciated that those skilled in the art will be able to devise various arrangements that , although not explicitly described or shown herein , embody the present principles and are included within its spirit and scope . all examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the present principles and the concepts contributed by the inventor ( s ) to furthering the art , and are to be construed as being without limitation to such specifically recited examples and conditions . moreover , all statements herein reciting principles , aspects , and embodiments of the present principles , as well as specific examples thereof , are intended to encompass both structural and functional equivalents thereof . additionally , it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future , i . e ., any elements developed that perform the same function , regardless of structure . thus , for example , it will be appreciated by those skilled in the art that the block diagrams presented herein represent conceptual views of illustrative circuitry embodying the present principles . similarly , it will be appreciated that any flow charts , flow diagrams , state transition diagrams , pseudocode , and the like represent various processes which may be substantially represented in computer readable media and so executed by a computer or processor , whether or not such computer or processor is explicitly shown . the functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing software in association with appropriate software . when provided by a processor , the functions may be provided by a single dedicated processor , by a single shared processor , or by a plurality of individual processors , some of which may be shared . moreover , explicit use of the term “ processor ” or “ controller ” should not be construed to refer exclusively to hardware capable of executing software , and may implicitly include , without limitation , digital signal processor (“ dsp ”) hardware , read - only memory (“ rom ”) for storing software , random access memory (“ ram ”), and non - volatile storage . other hardware , conventional and / or custom , may also be included . similarly , any switches shown in the figures are conceptual only . their function may be carried out through the operation of program logic , through dedicated logic , through the interaction of program control and dedicated logic , or even manually , the particular technique being selectable by the implementer as more specifically understood from the context . in the claims hereof , any element expressed as a means for performing a specified function is intended to encompass any way of performing that function including , for example , a ) a combination of circuit elements that performs that function or b ) software in any form , including , therefore , firmware , microcode or the like , combined with appropriate circuitry for executing that software to perform the function . the present principles as defined by such claims reside in the fact that the functionalities provided by the various recited means are combined and brought together in the manner which the claims call for . it is thus regarded that any means that can provide those functionalities are equivalent to those shown herein . reference in the specification to “ one embodiment ” or “ an embodiment ” of the present principles , as well as other variations thereof , means that a particular feature , structure , characteristic , and so forth described in connection with the embodiment is included in at least one embodiment of the present principles . thus , the appearances of the phrase “ in one embodiment ” or “ in an embodiment ”, as well any other variations , appearing in various places throughout the specification are not necessarily all referring to the same embodiment . fig1 depicts a wearable sensor - unit 10 before attachment to an article of clothing . this figure demonstrates a method of universal attachment . as shown , the sensor 10 includes a sensor part 12 and an clip - on casing 20 . the sensor 12 includes a bottom or lower surface 14 , contoured lower corners 18 , and an optical sensor 16 . the clip - on casing 20 includes a window or opening 22 in a top surface thereof and side surface 24 . the bottom of surface 24 has slightly curved in portions 28 configured to frictionally grip onto the lower corners 18 of the sensor 12 . examples of materials that can be used for the clip - on casing 20 and / or the sensor part 12 are any materials that have been considered safe for children , such as , for example , abs plastic ( i . e ., acrylonitrile butadiene styrene ). those of skill in the art will appreciate that other materials could be used for the clip - on casing 20 and / or the sensor 12 without departing from the intended scope of the present disclosure . the sensor 12 includes an optical sensor 16 in an upper surface thereof and a corresponding window or opening 22 in the clip - on casing 20 . thus , when the sensor 12 is either not fastened to the clip - on casing 20 , or is fastened therein without being attached to an article of clothing , light will pass unimpeded to optical sensor 16 , thus indicating that the same is not attached to an article of clothing . as will be discussed further below , sensor 12 will transmit a signal to a remote device ( e . g ., computing device such as a smartphone , or other computing device ) thus indicating that the same is not attached to an article of clothing . further details on the internal workings of sensor 12 are discussed below with reference to fig4 . fig2 shows the wearable sensor 10 attached to an article of clothing 30 . to achieve that state , a user - operator has to place clothing material 30 in between the external clip - on casing 20 and an internal housing containing sensor 12 . then a user - operator presses the internal housing containing sensor 12 into the external clip - on casing 20 until the surface 24 snap over the lower corners they will securely fasten , confining clothing material in between . thickness of clothing material will diminish margins within the attachment and add to the strength of attachment by making it more securely held . as shown , when the clothing 30 is sandwiched between the sensor 12 and clip - on casing 20 , curved portions 28 frictionally engage the lower corners 18 and “ snap ” the sensor onto the clothing in a secure manner . the thickness of the clothing 30 increases the friction between the clip - on casing 20 and sensor 12 , thus providing for a very secure attachment . once the sensor 12 is inserted into the clip - on casing 20 , the clothing 30 will operate to block light from passing to optical sensor 16 . in this manner , the sensor 12 will transmit a signal to the remote device ( e . g ., computing device such as a smartphone , or other computing device ), thus indicating that the sensor has been attached to an article of clothing . fig3 shows a schematic diagram of the operation of wearable sensor 10 . the user 1 attaches the sensor 10 to an article of their clothing ( not shown ). the sensor 10 is in remote communication with a mobile computing / reading device 102 , such as , for example , a smartphone , a tablet , a laptop or any other suitable computing device . for home applications , the computing device need not be mobile , but it is preferred that computing device 102 is a mobile device . the mobile reader device 102 is configured to measure , for example , a health status signal provide by the sensor . this health status signal can then be transmitted to a health status database 210 . the health status database 210 can operate in many ways in accordance with the present principles . for example , health status database 210 can respond to the health status signal by sending a signal back to the mobile computing / reader device . this response can be an “ all is ok ” signal indicating that the health status of the individual has not changed in a manner that warrants any concern ( e . g ., signal received indicates that the monitored conditions are still within predetermined ranges for the same ). alternatively , the response could be “ heart rate is high ”, “ blood pressure ” is low , or any other health related type of warning indicating that the monitored condition is now outside the predetermined ranges for that individual . in this case , an alert or trigger would be sent to the mobile reader 102 . in this situation , a mobile reader device detects a transmitted alert , triggering an alarm within a mobile reader device environment . alarm in a mobile reader device may be audible , visual or a combination of both , and may also include an audible and / or visual alert notification to a third party , such as hospital . in other alternatives , the mobile reader could send a text message or call a third party with a prerecorded message . as illustrated in fig4 , the sensor unit 20 consists of a micro - controller or processor 201 , a low energy wireless transmitter 202 , at least one sensor or array of sensors 203 and a power source 204 that powers the device and all sensor unit components . the mobile reader / computing device 102 consists of several components specific for a mobile device , however , only those of relevance to the present invention are disclosed . by way of example , the mobile device 201 includes a low energy reader 206 , a processing application 207 running within a processor and to be displayed on a user interface 208 as a front end to show health status signal and alerts , and a wireless transmitter / receiver 209 . as shown in the present example , mobile device 102 detects and reads sensor unit 20 by receiving wireless low energy signals transmitted from the sensor . the mobile device 102 may re - transmit the signal further via the wireless transmitter 209 to a third - party , such as the health status database server located off - site 210 . those of skill in the art will appreciate that the wireless transmitter / receiver 209 of the mobile device can be wifi based , or rf based depending on the transmitting / receiving necessary . according to one implementation , the sensor unit mcu 201 will store and run some software that uses the signal measured by an optical sensor 16 in order to detect if a wearable sensor is attached to clothing material . in this regard , those of skill in the art will appreciate that mcu 201 will either include its own memory , or the sensor unit 20 will have a memory component operating in conjunction with the mcu 201 . with respect to the one or more specific sensors 203 contained in the sensor device 20 , a non - limiting list of examples of such sensors could be , for example , blood pressure , heart rate , temperature , sound , light , pressure , conductance etc . according to other contemplated embodiments , one sensor can measure and transmit a signal that is processed by the mobile device or health database to derive multiple sensed conditions from the received signal . by way of further example , through the use of accelerometers , the transmitted signal can include multiple readings which when deciphered / decoded by the mobile device or connected health database , things like position , movement ( or lack thereof ), activity levels , fall detection , tremors , etc . can all be derived and detected from the transmitted signal . these and other features and advantages of the present principles may be readily ascertained by one of ordinary skill in the pertinent art based on the teachings herein . it is to be understood that the teachings of the present principles may be implemented in various forms of hardware , software , firmware , special purpose processors , or combinations thereof . most preferably , the teachings of the present principles are implemented as a combination of hardware and software . moreover , the software may be implemented as an application program tangibly embodied on a program storage unit . the application program may be uploaded to , and executed by , a machine comprising any suitable architecture . preferably , the machine is implemented on a computer platform having hardware such as one or more central processing units (“ cpu ”), a random access memory (“ ram ”), and input / output (“ i / o ”) interfaces . the computer platform may also include an operating system and microinstruction code . the various processes and functions described herein may be either part of the microinstruction code or part of the application program , or any combination thereof , which may be executed by a cpu . in addition , various other peripheral units may be connected to the computer platform such as an additional data storage unit and a printing unit . it is to be further understood that , because some of the constituent system components and methods depicted in the accompanying drawings are preferably implemented in software , the actual connections between the system components or the process function blocks may differ depending upon the manner in which the present principles are programmed . given the teachings herein , one of ordinary skill in the pertinent art will be able to contemplate these and similar implementations or configurations of the present principles . although the illustrative embodiments have been described herein with reference to the accompanying drawings , it is to be understood that the present principles is not limited to those precise embodiments , and that various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present principles . all such changes and modifications are intended to be included within the scope of the present principles as set forth in the appended claims .
a method and system of universal , secure attachment with attachment detection mechanism , of a wearable sensor - unit to any article of clothing worn around the body in order to measure vital signals of a person , such as motion , movements and activity levels . the method and system permits : reliable attachment to any article of clothing ; an attachment in any position to clothing or fabric worn by a person ; and detection for the wearable sensor attachment to an article of clothing to minimize false alarms .