CN205403996U - Thermometer - Google Patents

Thermometer Download PDF

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Publication number
CN205403996U
CN205403996U CN201620177749.8U CN201620177749U CN205403996U CN 205403996 U CN205403996 U CN 205403996U CN 201620177749 U CN201620177749 U CN 201620177749U CN 205403996 U CN205403996 U CN 205403996U
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CN
China
Prior art keywords
temperature
loop
communications device
cathode output
output end
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Expired - Fee Related
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CN201620177749.8U
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Chinese (zh)
Inventor
戚晨
岳海啸
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Shanghai Meecaa Medical Technology Co Ltd
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Shanghai Meecaa Medical Technology Co Ltd
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Priority to CN201620177749.8U priority Critical patent/CN205403996U/en
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Publication of CN205403996U publication Critical patent/CN205403996U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a thermometer for the await measuring temperature of object of collection, thereby and carry this temperature to the mobile communication device and let temperature display on the mobile communication device, include: temperature -sensing element has: contact jaw, mains voltage input and the signal output part that will carry away with the corresponding temperature of temperature, headphone plug has earphone jack four the interior electrodes that are used for inserting the mobile communication device, the polarity conversion return circuit is connected with headphone plug, has positive output end and cathode output, mains voltage control loop connects between positive output end and cathode output for it holds to voltage input to export stable mains voltage, and temperature signal carries the return circuit, and one end is connected with the temperature output, and the other end is connected with the polarity conversion return circuit for export temperature signal to the polarity conversion return circuit, wherein, temperature signal passes through the polarity conversion return circuit and headphone plug is carried the device to mobile communication.

Description

Thermometer
Technical field
This utility model relates to a kind of temperature-detecting device, is specifically related to a kind of simple in construction, without installing the thermometer that battery just can measure the temperature of object under test.
Background technology
At first, the mercurial thermometer utilize hydrargyrum heat naturally to expand, meeting the principle of cold natural shrinking and making is widely used in measuring the temperature of human body or object.General mercurial thermometer is made up of glass, and it comprises mercury ball and mercury column.In temperature taking process, the hydrargyrum in mercurial thermometer is expanded by heating because of the temperature of human body or object, and the hydrargyrum after expansion rises along mercury column, and people read data according to outside graduation apparatus can obtain the temperature of human body or object.
But, the mercurial thermometer made due to glass is broken, measure numerical value and also can produce Different Results because of the visual angle of people, especially mercurial thermometer is contained within hydrargyrum (hydrargyrum) metal, the hydrargyrum metal meeting serious harm mankind, environmental ecology and animals and plants, countries in the world disabling hydrargyrum has become trend so that electronic thermometer arises at the historic moment and replaces mercurial thermometer gradually.
Generally, electronic thermometer is by temperature sensor, liquid crystal display, button cell, special IC, microprocessor and other electronic devices and components composition, its measuring principle be utilize the timing circuit that comprises in integrated circuit to calculate oscillating circuit vibration that the reference resistance of external connection and electric capacity constitutes is fiducial time to the time required for a specific times, then switch to a critesistor electric capacity same with above-mentioned oscillating circuit vibrate, and obtain the number of oscillation within fiducial time, be converted to data signal via the internal arithmetic of microprocessor and shown by display.Electronic thermometer can measure the temperature of human body or object rapidly and accurately, compared with traditional mercury, has a convenient reading, and the time of measuring is short, and certainty of measurement is high, and especially electronic thermometer is without hydrargyrum, to human body and environmentally friendly.
But, exactly because all containing the electronic component such as button cell and microprocessor in electronic thermometer, therefore, the overall structure of current electronic thermometer is relatively big, takes up room, it has not been convenient to clamping.And, it is required for battery and powers and could work, when dead battery, in addition it is also necessary to professional just can take replacing battery apart, cause that use is convenient not.
Utility model content
This utility model carries out to solve the problems referred to above, it is therefore intended that provide a kind of simple in construction, without installing the thermometer that battery just can measure the temperature of object under test.
This utility model provides a kind of thermometer, for gathering the temperature of object under test, and this temperature is delivered to mobile communications device thus allowing temperature show on mobile communication devices, have the feature that, including: temperature-sensing element, for collecting temperature, have: the contact jaw that contacts with object under test, power voltage input terminal and the signal output part that the temperature signal corresponding with temperature is transferred out;Headset plug, matches with the earphone jack of mobile communications device, has four electrodes for inserting in earphone jack;Dipole inversion loop, is connected with headset plug, has cathode output end and cathode output end;Supply voltage regulating loop, is connected between cathode output end and cathode output end, and the external voltage for mobile communications device conveying is come is adjusted continuing exporting stable supply voltage to power voltage input terminal;And temperature signal conveying loop, one end is connected with signal output part, and the other end is connected with dipole inversion loop, for by temperature signal output to polarity conversing circuits, wherein, temperature signal is transported to mobile communications device by dipole inversion loop and headset plug.
In the thermometer that this utility model provides, it is also possible to have a feature in that wherein, dipole inversion loop is the full-bridge change-over circuit that four MOS transistors are constituted.
In the thermometer that this utility model provides, can also have a feature in that wherein, supply voltage regulating loop is made up of parallel resistance and stabilivolt, one end of parallel resistance is connected with cathode output end, the other end is connected with cathode output end, one end of stabilivolt is connected with cathode output end, the other end is connected with cathode output end, when the external voltage of mobile communications device output is more than or equal to predetermined value, current path is formed between dipole inversion loop and stabilivolt, when the external voltage of mobile communications device output is less than predetermined value, current path is formed between dipole inversion loop and parallel resistance.
In the thermometer that this utility model provides, it is also possible to having a feature in that wherein, temperature signal is the audio signal corresponding with temperature.
In the thermometer that this utility model provides, can also have a feature in that wherein, temperature-sensing element includes at least: control chip and the critesistor being connected with control chip, temperature signal conveying loop comprises: damping resistance and capacitance, one end of damping resistance is connected with control chip, the other end is connected with one end of capacitance, and the other end of capacitance is connected with dipole inversion loop.
The effect of utility model and effect
nullThermometer involved by this utility model,Because after the four of headset plug electrodes are inserted in the earphone jack of mobile communications device,Enable to mobile communications device powered to thermometer by these four electrodes,The external voltage carried by mobile communications device can be continuously obtained stable supply voltage after flowing through dipole inversion loop and loop of voltage regulation,This supply voltage is transported to the power voltage input terminal via temperature-sensing element,Make temperature-sensing element can normal operation so that gather object under test temperature,The temperature signal collected is delivered to dipole inversion loop by the temperature signal conveying loop being connected with signal output part,It is transported to mobile communications device then through by headset plug,Thus the temperature of object under test is shown on mobile communication devices,So,Thermometer of the present utility model is connected with the earphone jack of mobile communications device only by headset plug without installing battery,Just can measure the temperature of object under test,Simple in construction,Dexterous light,Easy to use.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of thermometer in embodiment of the present utility model;
Fig. 2 is the structured flowchart of thermometer in embodiment of the present utility model;And
Fig. 3 is the internal circuit schematic diagram of thermometer in embodiment of the present utility model.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reaching purpose and effect and be easy to understand, thermometer of the present utility model is specifically addressed by following example in conjunction with accompanying drawing.
Fig. 1 is the axonometric chart of thermometer in embodiment of the present utility model;And Fig. 2 is the structured flowchart of thermometer in embodiment of the present utility model.
As shown in Figure 1, 2, in the present embodiment, thermometer 100 is as a kind of thermometer, it is used in measurement figure the temperature of not shown object under test, and also can be delivered in figure in not shown mobile communications device by the temperature measured, thus the temperature of object under test is allowed to show on mobile communication devices.Here, object under test can be the object under test that human body (namely, user), animal body or liquid etc. arbitrarily have temperature, in the present embodiment, is illustrated for human body, and temperature now refers to the body temperature of user.It addition, mobile communications device can be the communicators such as existing mobile phone or panel computer.
As it is shown in figure 1, thermometer 100 has a housing 110.One end diameter of housing 110 is less, in shaft-like, it is simple to directly contact with the health of user, for instance, be clamped in the axillary fossa of user;The other end is relatively large in diameter, it is simple to user hand grip.
As in figure 2 it is shown, thermometer 100 includes temperature-sensing element 10, headset plug 20, dipole inversion loop 30, supply voltage regulating loop 40 and temperature signal conveying loop 50.
Temperature-sensing element 10 is arranged near one end that housing 110 diameter is less, for gathering the body temperature of user.
Fig. 3 is the internal circuit schematic diagram of thermometer in embodiment of the present utility model.
As shown in Figure 2,3, temperature-sensing element 10 comprises control chip 11, critesistor 12 (i.e. resistance NTC in Fig. 3), reference resistance 13 (i.e. resistance R4 in Fig. 3) and oscillating capacitance 14 (i.e. electric capacity C3 in Fig. 3).
Work as it is shown on figure 3, control chip 11 is used for controlling critesistor 12, reference resistance 13 and oscillating capacitance 14, thus carrying out the collection of temperature.It has power input port the 15, first vibration output port 16a, the second vibration output port 16b, the 3rd vibration output port 16c, signal input port 17, signal output port 18 and GND (ground connection) port 19.
Critesistor 12 is as a kind of temperature-sensing element, and its one end is connected with the first vibration output port 16a, and the other end is connected with signal input port 17.Additionally, it is arranged on the end of housing 110 diameter small end, and is exposed to outside, thus when this one end of thermometer 100 is clamped in axillary fossa by user, critesistor 12 directly can contact with the health of user such that it is able to gathers the body temperature of user exactly.
One end of reference resistance 13 is connected with the second vibration output port 16b, and the other end is connected with signal input port 17, here, reference resistance 13 is a measuring resistance, in gathering the process of body temperature of user, for comparison reference, thus obtaining the body temperature of user.
One end of oscillating capacitance 14 is connected with the 3rd vibration output port 16c, the other end is connected with signal input port 17, it is for being used in combination with critesistor 12, namely, when critesistor 12 collects the temperature and resistance corresponding with the body temperature of user, there is vibration between critesistor 12 and oscillating capacitance 14 thus producing vibration.
In temperature acquisition process, control chip 11 controls critesistor 12 and gathers the body temperature of user, obtains further between reference resistance 13 and oscillating capacitance 14 and corresponding parameter of oscillation (such as frequency of oscillation) between critesistor 12 with oscillating capacitance 14.
In the present embodiment, there is between frequency of oscillation and the temperature between reference resistance 13 and oscillating capacitance 14 corresponding relation of standard.So, based on the frequency of oscillation produced between the corresponding relation between frequency of oscillation and the temperature of generation, corresponding relation and critesistor 12 and the oscillating capacitance 14 between critesistor 12 and reference resistance 13 between reference resistance 13 and oscillating capacitance 14, the body temperature of user can be obtained.
Further, by the switching device of control chip 11, the real-time body temperature of the user obtained is converted to corresponding temperature signal, finally this temperature signal is transferred out via signal output port 18.In the present embodiment, switching device is analog-digital converter ADC or resistance-frequency changer;This temperature signal is a kind of audio signal.
In temperature-sensing element 10, using critesistor 12 as the contact jaw contacted with user;Using the power input port 15 of control chip 11 and GND port 19 as power input;Using the signal output port 18 of control chip 11 as signal output part.
Again as it is shown in figure 1, headset plug 20 is overall is arranged on the other end relative with contact jaw of housing 110 in similar cylindric, it is used in combination for the earphone jack with mobile communications device, namely inserts in the earphone jack of mobile communications device.And, in the present embodiment, headset plug 20 is connected by the other end of connecting line 21 with housing 110, so, while making contact jaw be clamped in the axillary fossa of user, it is ensured that headset plug 20 is inserted into being held in hands by user or in the earphone jack of distance user mobile communications device farther out.
Headset plug 20 has four electrodes 22 of the one end being positioned close to connecting line 21.When headset plug is inserted in the earphone jack of mobile communications device, mobile communications device these four electrodes 22 is positioned at what two electrodes 22 of rear end just can be arranged with earphone jack mike electrode and ground electrode is connected, so that can pass through the supply voltage (i.e. running voltage) that these two electrodes 22 provide thermometer 100 to work required to thermometer 100.
What draw in figure 3 is the structural representation of headset plug 20, and the position that wherein numeral " 1 ", " 2 ", " 3 " and " 4 " represents is four electrodes 22.
As it is shown on figure 3, dipole inversion loop 30 is connected with two electrodes 22 being positioned at rear end of headset plug 20, carry out dipole inversion for the external voltage that mobile communications device conveying is come.This is because the position that arranges of mike electrode in the earphone jack of different mobile phones and ground wire electrode is likely to be contrary, it is to ensure that the polarity of voltage that the conveying of any one mobile phone comes is consistent by dipole inversion loop 30 so that thermometer 100 can the earphone jack of compatible two kinds of standard interfaces of CTIA and OMTP.
In the present embodiment, dipole inversion loop 30 is the full-bridge change-over circuit being made up of four MOS transistors (i.e. transistor D1, transistor D2, transistor D3 and transistor D4), and it has input 31, input 32, cathode output end 33 and cathode output end 34.
The electrode 22 that input 31 is corresponding with numeral " 3 " is connected;The electrode 22 that input 32 is corresponding with numeral " 4 " is connected;Cathode output end 33 is connected with supply voltage regulating loop 40 respectively with cathode output end 34.
The positive pole of transistor D1 is connected with cathode output end 33, and negative pole is connected with input 31.The positive pole of transistor D2 is connected with cathode output end 33, and negative pole is connected with input 32.The positive pole of transistor D3 is connected with input 31, and negative pole is connected with cathode output end 34.The positive pole of transistor D1 is connected with input 32, and negative pole is connected with cathode output end 34.
Enable to voltage that mobile communications device conveying comes behind dipole inversion loop 30 by the dipole inversion loop 30 of said structure, cathode output end 33 what export is all forward voltage, cathode output end 34 what export is all backward voltage.
Supply voltage regulating loop 40 is connected between the cathode output end 33 in dipole inversion loop 30 and cathode output end 34, for the voltage exported by dipole inversion loop 30 is carried out voltage stabilizing, thus providing stable voltage to temperature-sensing element 10, it is ensured that temperature-sensing element 10 can normal operation.This is because, the voltage swing of different mobile phone output is different, excessive or too small voltage all can make the temperature-sensing element 10 cannot normal operation, and allow for temperature-sensing element 10 from any one mobile phone, obtain identical voltage by arranging supply voltage regulating loop 40, it is ensured that its normal operation.
In the present embodiment, supply voltage regulating loop 40 is made up of parallel resistance 41 (i.e. resistance R3 in Fig. 3), stabilivolt 42 (i.e. transistor D5 in Fig. 3) and filter capacitor 43 (i.e. electric capacity C2 in Fig. 3).It has forward outfan 44 and negative sense outfan 45.
One end of parallel resistance 41 is connected with the cathode output end 33 in dipole inversion loop 30, and the other end is connected with the cathode output end 34 in dipole inversion loop 30.
One end of stabilivolt 42 is connected with the cathode output end 33 in dipole inversion loop 30, and the other end is connected with the cathode output end 34 in dipole inversion loop 30.In the present embodiment, stabilivolt 42 can be light emitting diode or Zener diode or Parallel Voltage Regulator Circuit integrated circuit.
One end of filter capacitor 43 is connected with the cathode output end 33 in dipole inversion loop 30, and the other end is connected with the cathode output end 34 in dipole inversion loop 30.It addition, using one end corresponding with cathode output end 33 of filter capacitor 43 as forward outfan 44, and using one end corresponding with cathode output end 34 of filter capacitor 43 as negative sense outfan 45.Forward outfan 44 is connected with the power input port 15 of control chip 11, and negative sense outfan 45 is connected with the GND port 19 of control chip 11.So, through the stable voltage of supply voltage regulating loop 40 output via as the power input port 15 of power input and GND port 19 supplying temperature sensing element 10, thus allowing temperature-sensing element 10 can gather the body temperature of user.
Specifically, the voltage stabilizing process of supply voltage regulating loop 40 is:
When the voltage U1 carried by dipole inversion loop 30 raises, the voltage U2 of parallel resistance 43 increases.Owing to stabilivolt 42 is in parallel with parallel resistance 43, therefore, the electric current of stabilivolt 42 increases, and the electric current I flowing through resistance R2 also increases therewith so that the voltage drop of resistance R2 increases, thus counteracting the rising of voltage U1 so that the voltage U2 of parallel resistance 43 remains unchanged.It is to say, be kept stable via the voltage of supply voltage regulating loop 40 output.
When the voltage U1 carried by dipole inversion loop 30 reduces, the voltage U2 of parallel resistance 43 declines therewith.Owing to stabilivolt 42 is in parallel with parallel resistance 43, therefore, the electric current of stabilivolt 42 reduces, and the electric current I flowing through resistance R2 also reduces therewith, and the voltage drop of resistance R2 reduces, thus counteracting the reduction of voltage U1 so that the voltage U2 of parallel resistance 43 remains unchanged.It is to say, still can be kept stable via the voltage of supply voltage regulating loop 40 output.
Additionally, for by mobile phone as mobile communications device for, after the earphone jack of mobile phone is inserted into external equipment (thermometer 100 in such as the present embodiment), based on the voltage in earphone jack, mobile phone can judge whether this external equipment is payload, when judging that this external equipment is not payload, then mobile phone stops being powered to this external equipment.
In order to ensure that mobile communications device can be powered to thermometer 100 constantly, the dynamic load control characteristic that supply voltage regulating loop 40 also has, so that the load characteristic of thermometer 100 drops in the payload interval of mobile communications device all the time, this payload interval ensure that device for mobile communication can persistently be powered to external equipment (i.e. thermometer 100).Specifically,
When the external voltage of mobile communications device output is more than or equal to predetermined value, that is, current mobile communications device is the mobile phone that power supply capacity is strong, now, main electrical current path is formed between dipole inversion loop 30 and stabilivolt 42, it is to say, the electric current exported by the cathode output end 33 in dipole inversion loop 30 flows back in cathode output end 34 mainly through stabilivolt 42.
When the external voltage of mobile communications device output is less than predetermined value, say, that current mobile communications device is the mobile phone that power supply capacity is weak, now, main electrical current path is formed between dipole inversion loop 30 and parallel resistance 41.This is because the external voltage of the weak mobile phone output of power supply capacity does not reach the voltage stabilizing value of stabilivolt 42, namely it is believed that stabilivolt 42 now is off-state, so, the cathode output end 33 in dipole inversion loop 30 electric current exported resistance 41 in parallel flows back in cathode output end 34.
By above-mentioned such dynamic load regulatory function, it is ensured that the thermometer 100 in the present embodiment is all payload for all mobile phones, so that mobile phone can be powered to thermometer 100 constantly.
One end of temperature signal conveying loop 50 is connected with the signal output port 18 as signal output part of control chip 11, the other end is connected with the cathode output end 33 in dipole inversion loop 30, export to polarity conversing circuits 30 for the temperature signal (i.e. aforesaid audio signal) that the body temperature with user that will obtain with control chip 11 is corresponding, this temperature signal is transported to mobile communications device again through dipole inversion loop 30 and headset plug 20, thus demonstrating the body temperature of user on mobile communication devices.
In the present embodiment, temperature signal conveying loop 50 is made up of damping resistance 51 (i.e. resistance R1 in Fig. 3) and capacitance 52 (i.e. electric capacity C1 in Fig. 3).
One end of damping resistance 51 is connected with the signal output port 18 of control chip 11, and the other end is connected with one end of capacitance 52.
One end of capacitance 52 is connected with the other end of damping resistance 51, and the other end is connected with the cathode output end 33 in dipole inversion loop 30.
In the present embodiment, the use operation of thermometer 100 and work process are:
Headset plug 20 is inserted in the earphone jack of mobile communications device (such as mobile phone) of user so that the voltage of mobile communications device is delivered in thermometer 100 by two electrodes 22 of headset plug 20.
Further, the voltage that conveying is come by the dipole inversion loop 30 being connected with two electrodes 22 carries out dipole inversion so that cathode output end 33 exports forward voltage, cathode output end 34 exports negative voltage.
Further, the voltage after dipole inversion is carried out voltage stabilizing by supply voltage regulating loop 40, thus exporting stable supply voltage to temperature-sensing element 10, to ensure that temperature-sensing element 10 can normal operation.
Then, the contact jaw of temperature-sensing element 10 is clamped in axillary fossa and gathers its temperature by user.
Control chip 11 controls critesistor 12 and gathers the body temperature of user, critesistor 12 is made to produce vibration with oscillating capacitance 14, control chip 11 obtains corresponding frequency of oscillation further, the body temperature of user is obtained by aforesaid acquisition process, and be the temperature signal of audio signal by this temperature transition, finally this temperature signal is delivered in temperature signal conveying loop 50 by signal output port 18.
Further, temperature signal is delivered to dipole inversion loop 30 by temperature signal conveying loop 50, is delivered in mobile phone again through headset plug 20, thus allowing the body temperature of user be displayed in mobile phone.
The effect of embodiment and effect
nullThermometer involved by the present embodiment,Because after the four of headset plug electrodes are inserted in the earphone jack of mobile communications device,Enable to mobile communications device powered to thermometer by these four electrodes,The external voltage carried by mobile communications device can be continuously obtained stable supply voltage after flowing through dipole inversion loop and loop of voltage regulation,This supply voltage is transported to the power voltage input terminal via temperature-sensing element,Make temperature-sensing element can normal operation so that gather object under test temperature,The temperature signal collected is delivered to dipole inversion loop by the temperature signal conveying loop being connected with signal output part,It is transported to mobile communications device then through by headset plug,Thus the temperature of object under test is shown on mobile communication devices,So,The thermometer of the present embodiment is connected with the earphone jack of mobile communications device only by headset plug without installing battery,Just can measure the temperature of object under test,Simple in construction,Dexterous light,Easy to use.
Above-mentioned embodiment is preferred case of the present utility model, is not intended to limit protection domain of the present utility model.
In the present embodiment, dipole inversion loop is the full-bridge change-over circuit being made up of four MOS transistors, and in thermometer of the present utility model, dipole inversion loop can also is that other has the structure of dipole inversion function, such as, dipole inversion loop is the change-over circuit being made up of analog switch.
In the present embodiment, temperature-sensing element directly collects the body temperature of user, and in thermometer of the present utility model, temperature-sensing element can also the body temperature of only Real-time Collection user, and corresponding temperature signal is delivered to mobile communications device via temperature signal conveying loop, the body temperature of user is then detected by mobile communications device.
In the present embodiment, the other end of temperature signal conveying loop is connected with the cathode output end in dipole inversion loop, and in thermometer of the present utility model, it is also possible to it is connected with the cathode output end in dipole inversion loop for the other end of temperature signal conveying loop.

Claims (5)

1. a thermometer, for gathering the temperature of object under test, and is delivered to mobile communications device by this temperature thus allowing described temperature be shown on described mobile communications device, it is characterised in that including:
Temperature-sensing element, is used for gathering described temperature, has: with the contact jaw that described object under test contacts, power voltage input terminal and the signal output part that transferred out by the temperature signal corresponding with described temperature;
Headset plug, matches with the earphone jack of described mobile communications device, has four electrodes for inserting in described earphone jack;
Dipole inversion loop, is connected with described headset plug, has cathode output end and cathode output end;
Supply voltage regulating loop, is connected between described cathode output end and described cathode output end, and the external voltage for the conveying of described mobile communications device is come is adjusted continuing to export stable supply voltage extremely described power voltage input terminal;And
Temperature signal conveying loop, one end is connected with described signal output part, and the other end is connected with described dipole inversion loop, for described temperature signal is exported to described dipole inversion loop,
Wherein, described temperature signal is transported to described mobile communications device by described dipole inversion loop and described headset plug.
2. thermometer according to claim 1, it is characterised in that:
Wherein, described dipole inversion loop is the full-bridge change-over circuit that four MOS transistors are constituted.
3. thermometer according to claim 1, it is characterised in that:
Wherein, described supply voltage regulating loop is made up of parallel resistance and stabilivolt,
One end of described parallel resistance is connected with described cathode output end, and the other end is connected with described cathode output end,
One end of described stabilivolt is connected with described cathode output end, and the other end is connected with described cathode output end,
When the described external voltage that described mobile communications device exports is more than or equal to predetermined value, between described dipole inversion loop and described stabilivolt, form current path,
When the described external voltage that described mobile communications device exports is less than predetermined value, between described dipole inversion loop and described parallel resistance, form current path.
4. thermometer according to claim 1, it is characterised in that:
Wherein, described temperature signal is the audio signal corresponding with described temperature.
5. thermometer according to claim 4, it is characterised in that:
Wherein, described temperature-sensing element includes at least: control chip and the critesistor being connected with described control chip,
Described temperature signal conveying loop comprises: damping resistance and capacitance,
One end of described damping resistance is connected with described control chip, and the other end is connected with one end of described capacitance,
The other end of described capacitance is connected with described dipole inversion loop.
CN201620177749.8U 2016-03-09 2016-03-09 Thermometer Expired - Fee Related CN205403996U (en)

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CN201620177749.8U CN205403996U (en) 2016-03-09 2016-03-09 Thermometer

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CN201620177749.8U CN205403996U (en) 2016-03-09 2016-03-09 Thermometer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105784178A (en) * 2016-03-09 2016-07-20 上海米开医疗科技有限公司 Thermometer, temperature detecting unit, temperature detecting device and temperature detecting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105784178A (en) * 2016-03-09 2016-07-20 上海米开医疗科技有限公司 Thermometer, temperature detecting unit, temperature detecting device and temperature detecting system
CN105784178B (en) * 2016-03-09 2018-03-27 上海米开医疗科技有限公司 Thermometer, temperature detecting unit, temperature-detecting device and system for detecting temperature

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Termination date: 20190309