CN204908245U - Warning bracelet - Google Patents
Warning bracelet Download PDFInfo
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- CN204908245U CN204908245U CN201520562299.XU CN201520562299U CN204908245U CN 204908245 U CN204908245 U CN 204908245U CN 201520562299 U CN201520562299 U CN 201520562299U CN 204908245 U CN204908245 U CN 204908245U
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model discloses a warning bracelet relates to an alarm device, including can waterproof shell with set up voltage follower, the pulse sensor who connects gradually, pulse signal amplifier, signal amplitude amplifier and the display alarm circuit in the shell, voltage follower connects between pulse sensor and signal amplitude amplifier, pulse sensor includes for the circuit provides the battery of power, the switch of being connected with the battery, the stabiliser IC1 that is connected with the switch, two current -limiting resistor being connected with stabiliser IC1's output are resistance R1 and resistance R2 respectively, resistance R1 connects infrared emission pipe LED1, and resistance R2 connects photo resistance R17, and photo resistance R17 receives the infrared linear light that infrared emission pipe LED1 launches.
Description
Technical field
The utility model relates to a kind of warning device, is specifically related to a kind of warning bracelet.
Background technology
Pulse and the heart rate of human body are consistent, as long as therefore measure Pulse Rate just can measure corresponding heart rate.Clinically temperature pulse respiration, blood pressure are referred to as vital sign.Pulse range is 60-100 time per minute, and the elderly is comparatively slow, is 55 to 60 beats/min.When Pulse Rate per minute is bradycardia lower than 50 times, be tachycardia higher than 160 times, cross to delay or overrun and all may bring life danger, all breakneck for heart patient, and heart disease has sudden, even if determine that it has heart disease also cannot predict and when can fall ill, problem is had to some healthy aspects, but do not need again to be hospitalized for observation or the crowd of long-term treatment, be as good as with ordinary person at ordinary times, What is more patients such as some sudden heart diseases under normal circumstances hospital cannot make a definite diagnosis at all, at this moment a warning bracelet movably surveying arteries and veins is very necessary.But at present, the instrument that professional medical structure uses is inconvenient to carry, also volume is comparatively large mostly for commercially available home-use instrument, and can not detect vital sign at any time.
In addition, a lot of old man can go out separately usually now, and a lot of danger just occurs in independent durante absentia.Many times old man is because a variety of causes loses heartbeat suddenly, but people around does not provide relief in time, and the relatives of old man are not because cannot rescue in time at one's side, use warning bracelet in time the situation of old man can be informed the people of surrounding, facilitate everybody to take to rescue measure accordingly according to alarm content.
Utility model content
The utility model is intended to provide a kind of warning bracelet, amasss to solve existing pulse detection instrument body the problem be very much not convenient for carrying.
For overcoming the above problems, take following scheme:
Scheme one: a kind of warning bracelet, comprising can the shell of waterproof and the voltage follower be arranged in shell, the pulse transducer be connected successively, pulse signal amplifier, signal amplitude amplifier and Display and Alarm Circuit; Described voltage follower is connected between pulse transducer and signal amplitude amplifier; Described pulse transducer comprises for circuit provides the battery of power supply, the switch be connected with battery, the voltage-stablizer IC1 be connected with switch, the resistance R1 be connected with the output of voltage-stablizer IC1 and resistance R2; Resistance R1 connects infrared emission tube LED1, and resistance R2 connects photo resistance R17, the infrared ray that photo resistance R17 receiving infrared-ray transmitting tube LED1 launches.
Operation principle:
By the characteristic of infrared light, infrared light human body cell, but not easily through blood, wrist is placed between infrared emission tube LED1 and photo resistance R17, the infrared ray that infrared emission tube LED1 sends is irradiated on photo resistance R17 by wrist, because the blood flow of wrist medium vessels presents pulse state along with beating of heart, the illumination being irradiated to photo resistance R17 also presents dynamic change.This just makes the resistance of photo resistance R17 also present suddenly big or suddenly small variable condition.Signal amplitude is amplified through signal amplitude amplifier by the change of photo resistance R17 after pulse signal amplifier amplifies again, then by the signal transmission after amplification to Display and Alarm Circuit, by Display and Alarm Circuit the change of photo resistance R17 resistance and heart beated simultaneous display out, this is the HR Heart Rate of people.
Beneficial effect:
1. a warning bracelet, shell can waterproof, and volume is little to be easy to carry, be worn over people avoid on hand lose, and near the more powerful wrist place of pulse, can be conducive to obtaining stronger pulse signal, to make measurement accuracy higher; With waterproof case, the circuit in available protecting shell does not affect by immersion, avoids the effect that human sweat is soaked in addition in addition.
2. in shell, be provided with voltage follower, the pulse transducer connected successively, pulse signal amplifier, signal amplitude amplifier and Display and Alarm Circuit; Described voltage follower is connected between pulse transducer and signal amplitude amplifier; Voltage follower is facilitated to provide stable supply voltage for signal amplitude amplifier; Be conducive to pulse transducer will receive pulse signal and be converted to the signal of telecommunication, then successively by pulse signal amplifier, signal amplitude amplifier and Display and Alarm Circuit, signal amplified and shows in Display and Alarm Circuit again after amplification, being conducive in time abnormal pulse signal being carried out display alarm.
3. pulse transducer comprises for circuit provides the battery of power supply, the switch be connected with battery, the voltage-stablizer IC1 be connected with switch, two current-limiting resistances being connected with the output of voltage-stablizer IC1 to be respectively resistance R1 and resistance R2; Resistance R1 connects infrared emission tube LED1, and resistance R2 connects photo resistance R17, the infrared ray that photo resistance R17 receiving infrared-ray transmitting tube LED1 launches; There is provided power supply with battery for whole circuit, be conducive to charging to battery, increase the service time of warning bracelet; Voltage-stablizer IC1 ensures to provide stable voltage for pulse transducer, infrared emission tube LED1 is enable to launch stable infrared ray, be convenient to photo resistance R17 receiving infrared-ray light simultaneously, avoid, because the infrared ray instability that infrared emission tube LED1 produces causes photo resistance R17 to receive the situation producing change in resistance, effectively improve sensitivity and the precision of pulse transducer.
Scheme two: on the basis of scheme one further, pulse signal amplifier comprises the operational amplifier IC21 be connected with the output of voltage-stablizer IC1, the in-phase end of operational amplifier IC21 is coupled between resistance R2 and photo resistance R17 by electric capacity C5, parallel resistance R4 and electric capacity C2 in the negative-feedback of operational amplifier IC21, the in-phase input end of the output direct concatenation operation amplifier IC24 of operational amplifier IC21, the negative-feedback parallel resistance R6 of operational amplifier IC24 and electric capacity C3; The in-phase input end of the output connection signal magnitude amplifier of operational amplifier IC24; Under the burning voltage provided at voltage-stablizer IC1 is provided, after pulse signal enters from the in-phase input end of operational amplifier IC21 after the amplification of operational amplifier IC21 by signal transmission to operational amplifier IC24, amplify through second time, be conducive to signal effectively to amplify.
Scheme three: on the basis of scheme two further, the in-phase input end of the operational amplifier IC23 of described signal amplitude amplifier is connected with the output of operational amplifier IC24, the inverting input of series resistance R13 in the positive feedback of operational amplifier IC23, operational amplifier IC23 connects the output of voltage follower; Operational amplifier IC23 output connects trigger IC3 through electric capacity C9; Trigger IC3 connects the grid of N-type FET VT1, the grounded drain of N-type FET VT1; The source electrode of N-type FET VT1 connects described Display and Alarm Circuit; Operational amplifier IC24 exports along with the signal of blood flow change is to the in-phase input end of operational amplifier IC23, pulse signal amplifies by operational amplifier IC23 further, make it have enough signal voltage amplitudes to go trigger flip-flops IC3 to overturn, be conducive to voltage amplitude to increase to required value range.
Scheme four: on the basis of scheme three further, voltage follower comprises the resistance R7 be connected with the output of voltage-stablizer IC1, the in-phase input end of resistance R7 concatenation operation amplifier IC22; The inverting input of operational amplifier IC22 is directly connected with output, and operational amplifier IC22 output is respectively through resistance R9 and the in-phase input end of adjustable resistance R11 concatenation operation amplifier IC21 and the inverting input of operational amplifier IC23.
Scheme five: on the basis of scheme three further, described Display and Alarm Circuit comprises the anode of LED 2 and one end of piezoelectric buzzer HTD that are connected with the source electrode of N-type FET VT1, LED 2 series resistance R16, the negative electrode of LED 2 is connected the output of voltage-stablizer IC1 with the other end of piezoelectric buzzer; When trigger IC3 exports a pulse, N-type FET VT1 conducting, LED 2 is luminous, flashed by LED2 and just can demonstrate heart rate, the piezoelectric buzzer HTD in parallel with LED 2 can produce sound and indicate, not only can be flashed by the exception of LED 2 when heart rate is abnormal and send warning reminding and note, the irregular sound that can also be sent by piezoelectric buzzer HTD sends warning reminding, is conducive to carrying out corresponding first aid operation wearer people at one's side according to warning message.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of the utility model embodiment.
Detailed description of the invention
Below by detailed description of the invention, the utility model is described in further detail:
Reference numeral in Figure of description comprises: infrared emission tube LED1, LED 2, diode VD1, N-type FET VT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, adjustable resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, photo resistance R17, electrochemical capacitor C1, electric capacity C2, electric capacity C3, electrochemical capacitor C4, electric capacity C5, electrochemical capacitor C6, electric capacity C7, electric capacity C8, electric capacity C9, electrochemical capacitor C11, voltage-stablizer IC1, operational amplifier IC21, operational amplifier IC22, operational amplifier IC23, operational amplifier IC24, trigger IC3, N-type FET VT1, piezoelectric buzzer HTD.
As shown in Figure 1, bracelet of reporting to the police comprises the shell of the ring-type that waterproof plastic is made and is arranged on voltage follower in shell, the pulse transducer be electrically connected successively, pulse signal amplifier, signal amplitude amplifier and a Display and Alarm Circuit, and voltage follower is connected between pulse transducer and signal amplitude amplifier.
Pulse transducer comprises the switch be connected with battery positive voltage, the anode of the electrochemical capacitor C1 be connected with switch and voltage-stablizer IC1 input, voltage-stablizer IC1 adopts 78L05, the minus earth of electrochemical capacitor C1, the output of voltage-stablizer IC1 connects the anode of electrochemical capacitor C11, one end of resistance R1 and resistance R2; The minus earth of electrochemical capacitor C11, the other end of resistance R1 connects the anode of infrared emission tube LED1, and resistance R2 connects one end of photo resistance R17, the minus earth of infrared emission tube LED1, the other end ground connection of photo resistance R17.Voltage-stablizer IC1 exports 5V voltage, provides stable operating current, make infrared emission tube LED1 send the infrared light of intensity constant after resistance R1 current limliting to infrared emission tube LED1.
Pulse signal amplifier comprises one end is connected one end ground connection operational amplifier IC21 with voltage-stablizer IC1, the in-phase end of operational amplifier IC21 is coupled between resistance R2 and photo resistance R17 by electric capacity C5, the inverting input contact resistance R3 of operational amplifier IC21, resistance R3 connects the anode of electrochemical capacitor C4, the minus earth of electrochemical capacitor C4.Parallel resistance R4 and electric capacity C2 in the negative-feedback of operational amplifier IC21, the in-phase input end of the output concatenation operation amplifier IC24 of operational amplifier IC21, the inverting input of operational amplifier IC24 connects the anode of electrochemical capacitor C6, the minus earth of electrochemical capacitor C6 through resistance R5; The negative-feedback parallel resistance R6 of operational amplifier IC24 and electric capacity C3.
The pulse signal that pulse transducer is picked up is exported by the upper end of photo resistance R17, the in-phase input end being coupled to operational amplifier IC21 through electric capacity C5 is directly coupled to the in-phase input end of operational amplifier IC24 after amplifying and export, and carries out amplification again.Electric capacity C2 and electric capacity C3 position suppress the suppression electric capacity added by high-gain amplifier self-excitation.
Signal amplitude amplifier comprises the output contact resistance R12 with operational amplifier IC24, and the in-phase input end of resistance R12 difference concatenation operation amplifier IC23 and resistance R13, between the in-phase input end that resistance R13 is connected to operational amplifier IC23 and output; The one end of the electric capacity C9 that operational amplifier IC23 output connects, 2nd pin of the anode of the diode VD1 be connected with the electric capacity C9 other end, one end of resistance R14 and trigger IC3, the 4th pin and the 8th pin, one end of resistance R15 and the output of voltage-stablizer IC1 of the negative electrode of diode VD1 and the other end of resistance R14, trigger IC3 are connected; 3rd pin of trigger IC3 connects the grid of N-type FET VT1, the grounded drain of N-type FET VT1; 7th pin and the 6th pin of trigger IC3 are connected between the other end of resistance R15 and one end of electric capacity C10, the other end ground connection of electric capacity C10.
Operational amplifier IC24 exports along with the signal of blood flow change is to the in-phase input end of operational amplifier IC23.Pulse signal amplifies by operational amplifier IC23 further, makes it have enough signal voltage amplitudes to go trigger flip-flops IC3 to overturn.
Voltage follower comprises the resistance R7 be connected with the output of voltage-stablizer IC1, the in-phase input end of resistance R7 concatenation operation amplifier IC22, one end of resistance R8 and one end of electric capacity C7, the other end ground connection of resistance R8 and electric capacity C7; The inverting input of operational amplifier IC22 is connected with output, one end of operational amplifier IC22 output difference contact resistance R9 and resistance R10, and the other end of resistance R9 is coupled between the in-phase input end of electric capacity C5 and operational amplifier IC21; The other end of resistance R10 connects one end of adjustable resistance R11, and the other end ground connection of adjustable resistance R11, the inverting input of the adjustable end concatenation operation amplifier IC23 of adjustable resistance R11, electric capacity C8 is connected between the adjustable end of adjustable resistance R11 and earth terminal.
Display and Alarm Circuit comprises one end of resistance R16 and one end of piezoelectric buzzer HTD of being connected with the source electrode of N-type FET VT1, the negative electrode of the other end connecting luminous diode LED2 of resistance R16, the anode of LED 2 connects the output of voltage-stablizer IC1 and the other end of piezoelectric buzzer HTD.
Operational amplifier IC21 to IC24 all adopts LM324N.
The 5V voltage that voltage-stablizer IC1 exports is carried out impedance transformation by voltage follower, reduces the internal resistance of source, provides stable reference voltage, to guarantee the certainty of measurement of warning bracelet to operational amplifier IC21 and operational amplifier IC23.Voltage one tunnel that operational amplifier IC22 exports is connected on the in-phase input end of operational amplifier IC21, for operational amplifier IC21 provides bias voltage, separately leading up to resistance R10, resistance R11 introduces the inverting input of operational amplifier IC23, compare with the in-phase input end signal of operational amplifier IC23, when dull thread irradiates photo resistance R17, the output of operational amplifier IC23 exports the high level for 5V; When above wrist is placed on, the pulse of operational amplifier IC23 in-phase input end frequency aroused in interest, make operational amplifier IC23 export the undersuing synchronous with heart rate, this signal is used for the monostable flipflop work that trigger flip-flops IC3 forms, and makes trigger IC3 output positive pulse driving.Trigger IC3 adopts LM555, and when the 3rd pin of trigger IC3 exports a pulse, N-type FET VT1 conducting, LED 2 is luminous, is flashed just can demonstrate heart rate by LED2.The piezoelectric buzzer HTD in parallel with LED 2 can produce sound and indicate.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from the utility model structure, some distortion and improvement can also be made; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.The protection domain that this application claims should be as the criterion with the content of its claim, and the detailed description of the invention in description etc. record the content that may be used for explaining claim.
Claims (5)
1. a warning bracelet, is characterized in that: comprising can the shell of waterproof and the voltage follower be arranged in shell, the pulse transducer be connected successively, pulse signal amplifier, signal amplitude amplifier and Display and Alarm Circuit; Described voltage follower is connected between pulse transducer and signal amplitude amplifier; Described pulse transducer comprises for circuit provides the battery of power supply, the switch be connected with battery, the voltage-stablizer IC1 be connected with switch, the resistance R1 be connected with the output of voltage-stablizer IC1 and resistance R2; Resistance R1 connects infrared emission tube LED1, and resistance R2 connects photo resistance R17, the infrared ray that photo resistance R17 receiving infrared-ray transmitting tube LED1 launches.
2. a kind of warning bracelet according to claim 1, it is characterized in that: pulse signal amplifier comprises the operational amplifier IC21 be connected with the output of voltage-stablizer IC1, the in-phase end of operational amplifier IC21 is coupled between resistance R2 and photo resistance R17 by electric capacity C5, parallel resistance R4 and electric capacity C2 in the negative-feedback of operational amplifier IC21, the in-phase input end of the output direct concatenation operation amplifier IC24 of operational amplifier IC21, the negative-feedback parallel resistance R6 of operational amplifier IC24 and electric capacity C3; The in-phase input end of the output connection signal magnitude amplifier of operational amplifier IC24.
3. warning bracelet according to claim 2, it is characterized in that: the in-phase input end of the operational amplifier IC23 of described signal amplitude amplifier is connected with the output of operational amplifier IC24, the inverting input of series resistance R13 in the positive feedback of operational amplifier IC23, operational amplifier IC23 connects the output of voltage follower; Operational amplifier IC23 output connects trigger IC3 through electric capacity C9; Trigger IC3 connects the grid of N-type FET VT1, the grounded drain of N-type FET VT1; The source electrode of N-type FET VT1 connects described Display and Alarm Circuit.
4. warning bracelet according to claim 3, is characterized in that: voltage follower comprises the resistance R7 be connected with the output of voltage-stablizer IC1, the in-phase input end of resistance R7 concatenation operation amplifier IC22; The inverting input of operational amplifier IC22 is directly connected with output, and operational amplifier IC22 output is respectively through resistance R9 and the in-phase input end of adjustable resistance R11 concatenation operation amplifier IC21 and the inverting input of operational amplifier IC23.
5. a kind of warning bracelet according to claim 3, it is characterized in that: described Display and Alarm Circuit comprises the anode of LED 2 and one end of piezoelectric buzzer HTD that are connected with the source electrode of N-type FET VT1, LED 2 series resistance R16, the negative electrode of LED 2 is connected the output of voltage-stablizer IC1 with the other end of piezoelectric buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520562299.XU CN204908245U (en) | 2015-07-30 | 2015-07-30 | Warning bracelet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520562299.XU CN204908245U (en) | 2015-07-30 | 2015-07-30 | Warning bracelet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204908245U true CN204908245U (en) | 2015-12-30 |
Family
ID=54957446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520562299.XU Expired - Fee Related CN204908245U (en) | 2015-07-30 | 2015-07-30 | Warning bracelet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204908245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105146864A (en) * | 2015-07-30 | 2015-12-16 | 重庆市小榄电器有限公司 | Alarm wristband |
| CN107493080A (en) * | 2017-09-01 | 2017-12-19 | 广州时艺音响科技有限公司 | Low internal resistance Buffer output circuit |
-
2015
- 2015-07-30 CN CN201520562299.XU patent/CN204908245U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105146864A (en) * | 2015-07-30 | 2015-12-16 | 重庆市小榄电器有限公司 | Alarm wristband |
| CN107493080A (en) * | 2017-09-01 | 2017-12-19 | 广州时艺音响科技有限公司 | Low internal resistance Buffer output circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20160730 |