CN111426396A - Intelligent ear thermometer - Google Patents
Intelligent ear thermometer Download PDFInfo
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- CN111426396A CN111426396A CN202010379661.5A CN202010379661A CN111426396A CN 111426396 A CN111426396 A CN 111426396A CN 202010379661 A CN202010379661 A CN 202010379661A CN 111426396 A CN111426396 A CN 111426396A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
- G01J5/0011—Ear thermometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/061—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
- G01K13/223—Infrared clinical thermometers, e.g. tympanic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/061—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
- G01J2005/063—Heating; Thermostating
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Abstract
The invention provides an intelligent ear thermometer which comprises an ear thermometer body, wherein the ear thermometer body comprises a main body, an ear thermometer PCBA main control board and a sensing head, the sensing head is fixed at the top end of the main body, the ear thermometer PCBA main control board is arranged in the main body and is electrically connected with the sensing head, a digital display screen and a function detection key are arranged on the main body, the intelligent ear thermometer further comprises a heating base for preheating the sensing head, the heating base comprises a shell, a slot is formed in the top end of the shell and is matched with the sensing head, and a heating component is arranged on the outer ring of the slot and is used for heating the sensing head in the slot at a constant temperature. According to the intelligent ear thermometer provided by the invention, the sensing head is heated at a constant temperature by adopting the external heating device, so that the accuracy of measurement in any environment is ensured, the REID module is arranged on the heating base to read, collect and send the measurement information to the hospital computer system, the information management is realized, the operation time of medical staff is reduced, and the efficiency of data arrangement and collection is improved.
Description
Technical Field
The invention relates to the technical field of ear thermometers, in particular to an intelligent preheating type ear thermometer.
Background
An ear thermometer features that the heat-transfer electromagnetic translation movement of ear cavity drum membrane is received to convert it to electric voltage value, which is radiated by physical radiation theory, and the accurate infrared sensor (Thermopile) is used to receive the electric voltage and convert it to microcomputer. When the sensing head of the existing ear thermometer is used in a low-temperature environment, the sensing head for processing the low temperature can quickly reduce the temperature in an ear cavity, the physical phenomenon is the main reason of causing the measurement failure temperature to be lower and larger, and the patient can not be burnt, so the invention has been advocated that the invention is provided with the constant-temperature heating intelligent ear thermometer, the existing heating type ear thermometer (German Bolang) adopts an integrated structure with a built-in heating sheet, the sensing head is directly heated, the defect is that the power consumption is large when the ultra-low temperature is used, a battery with larger capacity is needed, the size of the battery capacity can influence the size of the ear thermometer, and the large volume of the ear thermometer can be directly caused when the battery with large capacity is adopted, and the use is inconvenient; small capacity batteries are not power consuming enough to be used at ambient temperatures below 16 c. In addition, with the continuous deepening of the informatization reformation of hospitals, manual medical records are reformed into electronic medical records at the same time, nurses need to record data into a computer while measuring the body temperature of patients, the body temperature data of hundreds of patients in each ward becomes a heavy work of the nurses every day from measurement to the recording of the body temperature data into the computer, and the continuously rising patient management and the continuous improvement of the patient nursing requirements are in contradiction with the lagging of the traditional nursing means.
Disclosure of Invention
The invention aims to provide an intelligent constant-temperature heating ear thermometer to solve the technical problem in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent ear thermometer comprises a main body, a PCBA main control board and a sensing head, the sensing head is fixed at the top end of the body, the PCBA main control board of the ear thermometer is arranged in the body and is electrically connected with the sensing head, the body is provided with a digital display screen, and the body also comprises a base used for sensing the constant temperature heating of the head, the base comprises a shell, the top end of the shell is provided with a slot which is closely combined with the sensing head, the outer ring of the slot is provided with a heating component which is used for heating the sensing head in the slot at constant temperature, the bottom end of the slot is provided with a temperature sensor for detecting the temperature in the slot, the outer side of the shell is provided with a charging socket, the heating device is characterized in that a circuit control module and a battery assembly are arranged in the shell, the battery assembly stores power to a battery in the battery assembly through a charging socket, and the heating assembly and the battery assembly are respectively and electrically connected with the circuit control module.
The ear thermometer is characterized by further comprising a PC end, the heating base is in signal connection with the ear thermometer body and the PC end respectively, an RFID module is arranged in the heating base and comprises an RFID reader-writer and a single chip microcomputer chip, the RFID reader-writer is arranged at the top end of the box body and used for reading chip information, and the single chip microcomputer chip is used for receiving, converting, storing and sending data.
This internal first wireless module that is equipped with of ear thermometer, first wireless module and ear thermometer PCB main control board electric connection, the singlechip chip on the heating base is equipped with second wireless module and carries out wireless data connection with the ear thermometer body.
The heating gun is characterized in that a first data interface is arranged on the gun body, a second data interface is arranged on the heating base and used for carrying out data transmission with the ear thermometer body through a data line, and the second data interface is electrically connected with the single chip microcomputer chip.
And a contact switch is arranged at the top end of the slot and used for controlling the start and stop of the constant-temperature heating assembly, and the contact switch is electrically connected with the circuit control module.
The sensing head comprises a sensing head shell, a hollow waveguide tube, a metal structural part and an infrared sensor, wherein a detection port is formed in the top end of the sensing head shell, a cavity structure is formed in the sensing head shell, the bottom end of the sensing head shell is fixedly connected with a gun body, the metal structural part is correspondingly fixed in the cavity of the sensing head shell, the metal structural part is of a hollow structure, the lower portion of the waveguide tube is correspondingly inserted into the upper portion of the metal structural part, the top end of the waveguide tube corresponds to the detection port of the sensing head shell, the infrared sensor is arranged on the lower portion of the metal structural part and in the metal structural part, and the infrared sensor is electrically connected with a PCB main control board of the ear thermometer.
Gold-plated layers are respectively arranged on the inner side and the outer side of the waveguide tube, the inner side of the waveguide tube is of a mirror surface structure, and at least one layer of heat insulation material is arranged on the outer side of the waveguide tube and used for preventing thermal shock.
And a PID temperature control program is written in the circuit control module and is used for carrying out constant temperature adjustment on the heating assembly.
The PID algorithm adopted by the PID temperature control program is as follows: forming control deviation according to the measured state temperature r (t) and the actual environment temperature c (t), namely e (t) = r (t) -c (t), forming control quantity by linear group of proportional control, integral control and differential control of the difference value, selecting proper control parameters to obtain satisfactory response characteristics,
the control law is as follows:
written as a transfer function is of the form:
wherein:
proportional gain for PID temperature control program;
is the integral gain of the PID temperature control program;
is the differential gain of the PID temperature control program.
The output of the proportional control is:
the temperature difference is amplified, and when the temperature difference occurs, the proportional control adjustment quickly generates an adjusting effect on the difference, so that the difference between the actual environment temperature and the temperature in the measurement state is quickly reduced; the output of the integral control is
Accumulating the difference between the actual environment temperature and the measured state temperature, continuously strengthening the function of the integral term if the difference exists, changing the control function into a constant which cannot be increased until the difference is zero, and stopping the output of the PID temperature control program on any value; the output of the calculus control is:
for predicting the difference between actual ambient temperature and measured state temperature
The differential control is proportional to the variation tendency (variation speed) of the difference, and predicts the variation tendency of the difference, and the faster the difference is changed, the larger the output of the differential control, so that the differential control can correct the controlled variable in advance before the difference becomes larger.
Compared with the prior art, the intelligent ear thermometer provided by the invention has the advantages that firstly, an external heating device is adopted to heat the sensing head at a constant temperature, so that the shell of the sensing head, which is in contact with the auditory canal of a human body, can be heated at the constant temperature in advance, the influence of the shell on the temperature of the auditory canal after the shell is placed in the auditory canal is avoided, the measurement accuracy is improved, and the external constant-temperature heating base can be used under a relatively low-temperature environment, the normal operation of a constant-temperature heating function can also be ensured, the large-volume structure of the integrated heating ear thermometer is avoided, and the comfort and portability of the use of the ear thermometer are ensured; secondly, the RFID module is arranged on the heating base, the information of the patient is acquired by reading the information of the chip, and the acquired information of the patient measured by the ear thermometer is comprehensively transmitted to the PC terminal for recording, so that the time of acquiring the body temperature information of the patient by medical staff is saved, and the informatization of data management is realized; 1, infrared sensor in the sensing head is the rear-mounted structure, carry out the electromagnetic translation through the guided wave pipe and receive, because infrared sensor has certain distance apart from the duct, be difficult to receive human body temperature's thermal shock influence, when the sensing head probes into external auditory canal, be difficult for reducing the duct temperature because of sensing head is ice-cold under the low temperature environment, 2, the outside parcel at the guided wave pipe has thermal-insulated membrane simultaneously, can hinder human body temperature to the thermal shock of guided wave pipe, it is more accurate to guarantee the guided electromagnetic information of guided wave pipe to infrared sensor, the measuring accuracy has been ensured, and this kind of rear-mounted infrared sensor, when heating the sensing head, can not influence the stability of sensor.
Drawings
FIG. 1: the structure schematic diagram of the ear thermometer body;
FIG. 2: the inner structure of the ear thermometer body is schematically shown;
FIG. 3: a sensing head front view;
FIG. 4: FIG. 3 is a sectional view taken along line A-A;
FIG. 5: the structure schematic diagram of the heating base;
FIG. 6: a top view of the heating base;
FIG. 7: FIG. 6 is a sectional view taken at B-B;
FIG. 8: a preheating schematic diagram of a preheating type ear thermometer;
FIG. 9: a schematic diagram of a data transmission block of a preheating type ear thermometer;
FIG. 10: and a structural block diagram of the PID controller.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Specific example 1: referring to fig. 1 to 9, in an embodiment of the present invention, an intelligent ear thermometer includes an ear thermometer body 1, where the ear thermometer body 1 includes a main body 2, an ear thermometer PCBA main control board 6 and a sensing head 3, the sensing head 3 is fixed at a top end of the main body 2, the ear thermometer PCBA main control board 6 is disposed in the main body 2 and electrically connected to the sensing head 3, and a digital display screen 4 and a function button 5 are disposed on the main body 2; the heating device is characterized by further comprising a constant-temperature heating base 7 used for preheating the sensing head 3, wherein the constant-temperature heating base 7 comprises a shell 701, a slot 702 is formed in the top end of the shell 701 and matched with the sensing head 3, a heating component 703 is arranged on the outer ring of the slot 702 and used for heating the interior of the slot 702 at a constant temperature, a temperature sensor 704 is arranged at the bottom end of the slot 702 and used for detecting the temperature of the interior of the slot 702, a charging socket 709 is formed in the outer side of the shell 701, a circuit control module 706 and a battery component 707 are arranged in the shell 701, the battery component 707 stores a power supply to a battery in the battery component 707 through the charging socket 709, and the heating component 703 and the battery component.
The ear thermometer is characterized by further comprising a PC end 8, the heating base 7 is in signal connection with the ear thermometer body 1 and the PC end 8 respectively, an RFID module 708 is arranged in the heating base 7, the RFID module 708 comprises an RFID reader-writer 708-1 and a single chip microcomputer chip 708-2, a passive RFID electronic tag is embedded in the chip, preset information is stored in the passive RFID electronic tag, the preset information comprises a patient ID number, the passive RFID electronic tag can receive signals transmitted by the RFID reader-writer 708-1, the transceiving process is completed, and the preset information is transmitted to the RFID reader-writer 708-1; the RFID reader-writer 708-1 is arranged at the top end of the box body 701 and used for reading chip information, the single chip microcomputer chip 708-2 is arranged in the box body 701, and the single chip microcomputer chip 708-2 is used for receiving, converting, storing and sending data.
The ear thermometer is characterized in that a first wireless module is arranged in the ear thermometer body 1 and is electrically connected with a PCB (printed circuit board) main control board 6 of the ear thermometer, the first wireless module is a wireless connection module such as WIFI (wireless fidelity) and Bluetooth, and a single chip 708-2 on the heating base 7 is provided with a second wireless module to be in wireless data connection with the ear thermometer body 1.
The gun body 2 is provided with a first data interface 201, the heating base 7 is provided with a second data interface 710 for data transmission with the ear thermometer body 1 through a data line, and the second data interface 710 is electrically connected with the single chip microcomputer chip 708-2. By setting two wireless and wired data transmission modes, which connection mode can be selected according to the use condition, when one transmission mode is abnormal, the operation can be continued through the other transmission mode, and the stability of data acquisition and transmission is ensured.
The top end of the slot 702 is provided with a contact switch 705 for controlling the start and stop of the heating component 703, and the contact switch 705 is electrically connected with the circuit control module 706. When the sensing head 3 is inserted into the slot 702, the contact switch 705 contacting the top end of the slot 702 controls the constant temperature heating temperature by the circuit control module 706, the heating component 703 is started to heat the sensing head 3 at constant temperature, and the sensing head is preheated, so that the sensing head 3 of the ear thermometer can not generate cold feeling when entering the ear canal in cold environment, the uncomfortable feeling of the patient in the cold environment can be effectively responded, and the measuring accuracy can be improved.
Measurement information collection procedure: referring to fig. 9, a chip is placed on the RFID reader 708-1 on the heating base 7 to read the ID information of the person to be detected, after the information reading is completed, the single chip 708-2 on the heating base 7 is connected to the ear thermometer body 1 through wireless or wired data, the digital display screen 4 of the ear thermometer body 1 displays that temperature measurement is started, the temperature sensing detection button 5 is pressed to measure the body temperature of the person to be detected, the body temperature value is displayed on the digital display screen 4, and the measured value is sent to the single chip 708-2 on the heating base 7 to perform data integration, and then the collected measurement information and the ID number are packed together and sent to the PC terminal 8 to be recorded.
The sensing head 3 comprises a sensing head shell 301, a hollow waveguide tube 302, a metal structural member 303 and an infrared sensor 304, wherein a detection port 301-1 is formed in the top end of the sensing head shell 301, the inside of the sensing head shell 301 is of a cavity structure, the bottom end of the sensing head shell 301 is fixedly connected with the gun body 2, the metal structural member 303 is correspondingly fixed in the cavity of the sensing head shell 301, the metal structural member 303 is of a hollow structure, the lower part of the waveguide tube 302 is correspondingly inserted into the upper part of the metal structural member 303, the top end of the waveguide tube 302 corresponds to the position of the detection port 301-1 of the sensing head shell 301, the infrared sensor 304 is arranged at the lower part of the metal structural member 303 and in the metal structural member 303, and the infrared sensor 304 is electrically connected with a PCBA main control board 6 of the ear thermometer. The metal structure 303 can average the thermal shock to the sensor and waveguide, and minimize the impact.
The inner side and the outer side of the waveguide 302 are respectively provided with a gold plating layer, the inner side of the waveguide 302 is of a mirror surface structure, the gold plating smooth surface of the waveguide 302 can ensure that the electromagnetic translation connection at the position of the sensor 3 is lost to the minimum, and when the sensor is used, the electromagnetic received by one end of the waveguide 302 can be quickly transmitted to the infrared sensor 304 at the other end of the waveguide 302 for collection, so that an accurate body temperature value can be obtained. The outer side of the waveguide tube 302 is wrapped with a layer of heat insulation film for preventing thermal shock.
Elastic protective sleeve 305 is provided on the outer side of sensing head shell 301, elastic protective sleeve 305 is made of silica gel material, so that the person to be tested feels more comfortable when the sensing head 3 is attached to the ear wall, and meanwhile, the waterproof effect can be achieved.
A PID temperature control program is written in the circuit control module 706, and the PID control program is used for performing constant temperature adjustment on the heating assembly.
Referring to fig. 10, the PID algorithm adopted by the PID temperature control program is:
according to the control deviation formed by the measured state temperature r (t) and the actual environment temperature c (t), i.e. e (t) = r (t) -c (t), the proportional control, the integral control and the differential control of the difference value form a control quantity through a linear group, a proper control parameter is selected to obtain a satisfactory response characteristic, and the control law is as follows:
written as a transfer function is of the form:
wherein:
proportional gain for PID temperature control program;
is the integral gain of the PID temperature control program;
is the differential gain of the PID temperature control program.
(1) Proportional control
The output of the proportional control is:
the temperature difference value is amplified, and when the temperature difference value appears, the proportional control adjustment quickly generates an adjusting effect on the difference value, so that the difference value between the actual environment temperature and the measured state temperature is quickly reduced. The proportional control is simple and quick, but the output of the proportional control always depends on the difference value of the temperature, so the proportional control has the obvious characteristic of difference adjustment and can generate static deviation on a control object with self-balancing capability; oscillations may occur in the time-lag system, affecting the dynamic response characteristics of the system. Proportional gain
The larger the output of the PID controller, the faster the regulation speed and the smaller the static deviation of the control process under the same error action. For a first order inertial temperature control system, the proportional gain is increased
The overshoot of the system can be effectively reduced. This is because, in the course of temperature rise, the faster the temperature rise speed, the larger the suppression amount of the output, and the smaller the output amount, the smaller the current passed through the heater, and the overshoot of the heater can be reduced to some extent.
(2) Integral control
The output of the integral control is
The function of the method is to accumulate the temperature difference, and the method is closely related to the steady-state accuracy of the PID controller. The effect of the integral term is continuously strengthened as long as the temperature difference exists, until the temperature difference is zero, the control effect is changed into a constant which cannot be increased, and the output of the PID controller can stay at any value. The integral term utilizes the accumulation mechanism to accelerate the process of the system approaching the set value, and can effectively reduce or even eliminate the pure ratioFor example, the static error generated. Compared with proportional control, integral regulation has the obvious characteristic of no-difference regulation, but also reduces the response speed of a system and increases the overshoot of a PID controller.
When integral gain
When the time is small, the integral effect is weak, the time for eliminating the static difference is long, the overshoot is small, the oscillation cannot be generated in the transition process, and the system stability is relatively high. Integral gain
When the integral is larger, the integral effect is stronger, the time for eliminating the static error is shorter, but the open loop gain of the measuring probe is larger, the stability of the measuring probe is reduced, and oscillation may be generated in the transition process.
(3) Differential control
The output of the calculus control is:
the method has the function of predicting the variation trend of errors, and can improve the response speed and stability of the measuring probe. The differential control is proportional to the variation tendency (variation speed) of the deviation, and it can predict the variation tendency of the error, and the faster the deviation is changed, the larger the output of the differential control, and therefore, the differential control can correct the control amount in advance before the error becomes large. Therefore, the differential action can improve the dynamic response performance of the measuring probe, accelerate the response speed of the measuring probe, reduce the overshoot and overcome the oscillation.
The magnitude of the differential action depends on the differential gain
，
The larger the differential effect, the stronger. Increase of
The response speed of the system can be accelerated, the overshoot is reduced, the adjusting time is shortened, and the stability of the measuring probe is improved.
The variation of a component with a large inertia or dead time always lags behind the variation of the error. For such controlled objects, the proportional action may cause the measurement probe to oscillate or even be unstable in the process of overcoming the error, and a differential action needs to be introduced to predict the variation trend of the error. Therefore, the proportional Plus Derivative (PD) control can adjust the control action of the proportional term inhibition error to be zero or even to be a negative value in advance, thereby effectively avoiding the serious overshoot phenomenon which can occur by the controlled variable. Therefore, for systems with large inertia or dead time, the PD controller may be used to improve the dynamics of the system tuning process. However, the differential effect can also be regarded as a high-pass filter, which has an amplifying effect on noise interference, and the differential gain cannot be increased too strongly to ensure the anti-interference performance of the system.
When the PID controller inputs the deviation signal, the differential term and the integral term firstly generate the jumping control quantity to quickly respond to the error signal. If the error signal does not disappear thereafter, the differentiating action gradually weakens with increasing time, but the integrating action gradually strengthens until the error signal disappears. During the operation of the system, the error signal input into the PID controller is constantly changing, and proportional, integral and differential control actions are always mutually matched and restricted until the error is eliminated.
In the temperature measuring process, the heating temperature and the heating frequency of the heater are controlled by adopting a PID algorithm in a PID temperature control program, and when the PID temperature control program inputs a difference signal of the actual environment temperature and the measured state temperature, a differential control item and an integral control item firstly generate a jumping control quantity to quickly respond to the temperature difference signal. If the temperature difference signal does not disappear after that, the differential action is gradually weakened with the increase of time, but the integral action is gradually strengthened until the temperature difference signal is eliminated.
Compared with the prior art, the intelligent ear thermometer provided by the invention has the advantages that firstly, the external constant-temperature heating device is adopted to heat the sensing head, the PID controller is utilized to detect the heating component to heat the sensing head at constant temperature, so that the shell of the probe, which is in contact with the auditory meatus of a human body, can be preheated in advance, the influence of the temperature of the auditory meatus after the shell of the sensing head is placed in the auditory meatus is reduced, the measurement accuracy is improved, the external heating base can heat the sensing head at constant temperature corresponding to ultralow temperature, the normal operation of heating power is ensured, the large-volume structure of the integrated heating ear thermometer is avoided, and the use comfort and portability of the ear thermometer are ensured; secondly, the RFID module is arranged on the heating base, the information of the patient is acquired by reading the information of the chip, and the body temperature information acquired by the ear thermometer is comprehensively acquired and sent to the PC terminal for recording, so that the time of acquiring the body temperature information of the patient by medical staff is saved, and the informatization of data management is realized; finally, infrared sensor in the sensing head is the rear-mounted structure, carry out electromagnetic transmission through the guided wave pipe, when using, during the sensing head probes into external auditory canal, infrared sensor can gather the electromagnetism of guided wave pipe conveying, because infrared sensor has certain distance apart from the duct, be difficult to receive the thermal shock of human body temperature, the outside parcel at the guided wave pipe has thermal-insulated membrane simultaneously, can hinder the thermal shock of human body temperature to the guided wave pipe, it is more accurate to guarantee the electromagnetism of guided wave pipe to infrared sensor transmission, the accuracy of measurement has been ensured, and this kind of rear-mounted infrared sensor, when heating the sensing head, can not influence the stability of sensor.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides an intelligent ear thermometer, includes ear thermometer body, ear thermometer body includes the rifle body, ear thermometer PCBA main control board and sense head, the top at the main part is fixed to the sense head, ear thermometer PCBA main control board is established and is connected with the sense head electricity in the main part be equipped with digital display screen and function detection button, its characterized in that in the main part: still including the heating base that is used for sensing the head to preheat, the heating base includes the casing, the casing top is equipped with the slot and is used for cooperateing with sensing the head, the slot outer lane is equipped with heating element and is used for heating the sensing head in the slot, the slot bottom is equipped with temperature sensor and is used for detecting the interior temperature of base, a charging socket has been seted up in the casing outside, establish circuit control module and battery pack in the casing, battery pack passes through the battery storage power supply of charging socket in to battery pack, heating element and battery pack are connected with the circuit control module electricity respectively.
2. The intelligent ear thermometer of claim 1, wherein: the ear thermometer is characterized by further comprising a PC end, the heating base is in signal connection with the ear thermometer body and the PC end respectively, an RFID module is arranged in the heating base and comprises an RFID reader-writer and a single chip microcomputer chip, the RFID reader-writer is arranged inside the shell and used for reading chip information, and the single chip microcomputer chip is used for receiving, converting, storing and sending data.
3. An intelligent ear thermometer according to claim 2, wherein: this internal first wireless module that is equipped with of ear thermometer, first wireless module and ear thermometer PCBA main control board electric connection, the singlechip chip on the heating base is equipped with the second wireless module and carries out wireless data connection with the ear thermometer body.
4. An intelligent ear thermometer according to claim 2, wherein: the main part is provided with a first data interface, the heating base is provided with a second data interface used for data transmission with the ear thermometer body through a data line, and the second data interface is electrically connected with the single chip microcomputer chip.
5. The intelligent ear thermometer of claim 1, wherein: and a contact switch is arranged at the top end of the slot and used for controlling the start and stop of the constant-temperature heating assembly, and the contact switch is electrically connected with the circuit control module.
6. The intelligent ear thermometer of claim 1, wherein: the sensing head comprises a sensing head shell, a hollow wave guide tube and one or more layers of heat insulating materials combined with the outer side of the wave guide tube, and is used for preventing a metal structural part and an infrared sensor, a detection port is formed in the top end of the sensing head shell, a cavity structure is arranged in the sensing head shell, the bottom end of the sensing head shell is fixedly connected with a main body, the metal structural part is correspondingly fixed in the cavity of the sensing head shell, the metal structural part is of a hollow structure, the lower part of the wave guide tube is correspondingly inserted into the upper part of the metal structural part, the top end of the wave guide tube corresponds to the position of the detection port of the sensing head shell, the infrared sensor is arranged at the lower part of the metal structural part and is arranged in the metal structural part, and the infrared sensor is electrically connected.
7. The intelligent ear thermometer of claim 6, wherein: gold-plated layers are respectively arranged on the inner side and the outer side of the waveguide tube, the inner side of the waveguide tube is of a mirror surface structure, and at least one layer of heat insulation material is arranged on the outer side of the waveguide tube and used for preventing thermal shock.
8. The intelligent ear thermometer of claim 1, wherein: and a PID temperature control program is written in the circuit control module and is used for carrying out constant temperature adjustment on the heating assembly.
9. The intelligent ear thermometer of claim 8, wherein: the PID algorithm adopted by the PID temperature control program is as follows: forming control deviation according to the measured state temperature r (t) and the actual environment temperature c (t), namely e (t) = r (t) -c (t), forming control quantity by linear group of proportional control, integral control and differential control of the difference value, selecting proper control parameters to obtain satisfactory response characteristics,
the control law is as follows:
written as a transfer function is of the form:
wherein:
proportional gain for PID temperature control program;
is the integral gain of the PID temperature control program;
is the differential gain of the PID temperature control program.
10. A preheatable ear thermometer according to claim 9 wherein: the output of the proportional control is:
the temperature difference value is amplified, and when the temperature difference value appears, the proportional control adjustment quickly generates an adjusting effect on the difference value, so that the difference value between the actual environment temperature and the temperature in the measurement state is quickly reduced; the output of the integral control is
Accumulating the difference between the actual environment temperature and the measured state temperature, continuously strengthening the function of the integral term if the difference exists, changing the control function into a constant which cannot be increased until the difference is zero, and stopping the output of the PID temperature control program on any value; the output of the calculus control is:
the differential control method has the functions of predicting the change trend of the difference value between the actual environment temperature and the measured state temperature, improving the response speed and the stability of a PID temperature control program, enabling the differential control to be in direct proportion to the change trend (change speed) of the difference value, and enabling the output of the differential control to be larger when the change of the difference value is faster, so that the differential control can correct the control quantity in advance before the difference value becomes larger.
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| CN202010379661.5A CN111426396A (en) | 2020-05-08 | 2020-05-08 | Intelligent ear thermometer |
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| CN202010379661.5A CN111426396A (en) | 2020-05-08 | 2020-05-08 | Intelligent ear thermometer |
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| CN114061756A (en) * | 2020-07-29 | 2022-02-18 | 山东炎一智能科技有限公司 | Infrared thermometer |
| TWI811628B (en) * | 2021-02-04 | 2023-08-11 | 緯創資通股份有限公司 | Electronic device and thermal insulation module thereof |
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