織物鍵盤按鍵開關(guān)組織結(jié)構(gòu)設(shè)計(jì)畢業(yè)設(shè)計(jì)論文-資料下載頁
2025-06-23 06:03本頁面
【正文】 least one heart rate value is entered by the user. Alternatively, age can be entered by the user. A formula in the said microprocessor will calculate the different heart rate zones. Said formula is known as the Karnoven formula whereby the maximum heart rate is derived by subtracting the user39。s age from 220.[0023] Said microprocessor processes the detected signals and interpret readings based on a preprogram heart rate zones set by the user through the input console. Microprocessor will have at least one heart rate zone. At the mentioned zone, the microprocessor will activate at least one light emitting device and activate an audio system by producing a signal to it to indicate the colour and tone respectively. For another heart rate zone, the microprocessor will activate a singular or a plurality of lights emitting devices and output signal to the audio system to produce a different tone. The purpose is to differentiate the different heart rate zones.[0024] In the two embodiments, output signals from the microprocessor are to be conditioned or processed before feeding to the light emitting devices and the audio system.[0025] Said light emitting devices are connected to one or many light propagating mediums to display colours.[0026] Said light propagating medium has light propagating characteristics with high refractive index so that the light rays will be confined in the medium.[0027] Said audio system consists of preamplification module and a sound producing device to project audible signals.BRIEF DESCRIPTION OF THE DRAWINGS[0028] Illustrative embodiments of the present invention will now be described, by way of example, with reference to the acpanying drawings, in which:[0029] FIG. 1: Representation of the invention in block diagram for the first preferred embodiment[0030] FIG. 2: Representation of the invention in block diagram for the second preferred embodiment[0031] FIG. 3: The sensor, microprocessor, light emitting devices and a speaker fabricated on a flexible medium interweaved with other yarn and light propagating medium to create a fabric[0032] FIG. 4: The sensor, microprocessor, light emitting devices, input console a display and a speaker fabricated on a flexible medium interweaved with other yarn and light propagating medium to create a fabric[0033] FIG. 5: A flow chart of the logic of the microprocessor for the first embodiment[0034] FIG. 6: A flow chart of the logic of the microprocessor for the second embodimentDETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS[0035] With reference to FIG. 1, said invention can be represented by the block diagram. The measurand (Item 10) is the physical quantity or condition that the instrumentation system measures. The source for the measurand (Item 10) is the living being body which generates a variety of signals. The measurand(Item 10) may be on the surface of the body or may be blood pressure in the chamber of the heart. There are many biomedical signals but of interest pertaining to the invention are the bioelectric signals, biomechanical signals and bioimpedance signals.[0036] Bioelectric signals are generated by many cells and muscle cells. Their basic source is the cell membrane potential which under certain conditions may be excited to generate the action potential. The electric field generated by the action of many cells constitutes the bioelectric signal.[0037] Biomechanical signals originate from some mechanical function of the biological system. They include all types of motion and displacement signals, pressure and flow signals etc.[0038] Bioimpedance signals originate from the impedance of the tissue. The measurement of skin resistance is one example.[0039] The intended measurand (Item 10) determines the transducer or sensor (Item 11) used in the next stage.[0040] The transducer (Item 11) used is to measure heart rate. The primary signal characteristics of a heart rate ranges from 25 to 300 beats per minute. The normal living being heart rate at rest is from 60 to 90 beats per minute. The transducer (Item 11) ideal for the signal characteristics can be derived from ECG (electro cardiogram) or arterial blood pressure waveform or photoelectric plethysmograph.[0041] Piezoelectric transducer or displacement sensor (Item 11) works on the principle that when an asymmetrical crystal lattice is distorted, a charge reorientation takes place, causing a relative displacement of negative and positive charges. The displaced internal charges induce surface charges of opposite polarity on opposite sides of the crystal. Surface charge can be determined by measuring the difference in voltage between electrodes attached to the surfaces of the measurand (Item 10).[0042] Piezoelectric materials are available as polymeric films such as polyvinylidene fluoride (PVDF). These films are thin, light weight and flexible and can be easily cut for adaptation to uneven services. There is quartz which offers high mechanical and thermal stability and has volume resistivity higher than 104[Omega] per centimeter and small internal electric loss.[0043] Therefore if the fabric is weaved with such a transducer/sensor (Item 11), the living being body slight movement would create a pressure that would trigger the said sensor (Item 11) to register some bioelectric events. A bination of sensors may be incorporated to detect the heart pulse.[0044] In order for the signal from the sensor (Item 11) to be patible with the microprocessor (Item 14), it is mon to normalize the electrical signals produced by the said sensor (Item 11) by the signal conditioner.[0045] The signals available from the transducers/sensors (Item 11) are often very small in magnitude usually at microvolt levels. The preamplifier (Item 12) boosts the level of input signal to match the requirements of the microprocessor (Item 14) after signal processing (Item 13).[0046] The signal processing (Item 13) performs operation like filtering
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鄂ICP備17016276號(hào)-1