CN105249935A - Rapid thermocouple temperature measuring device - Google Patents
Rapid thermocouple temperature measuring device Download PDFInfo
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- CN105249935A CN105249935A CN201510670538.8A CN201510670538A CN105249935A CN 105249935 A CN105249935 A CN 105249935A CN 201510670538 A CN201510670538 A CN 201510670538A CN 105249935 A CN105249935 A CN 105249935A
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Abstract
Disclosed in the invention is a rapid thermocouple temperature measuring device. The device is characterized in that the device comprises a temperature measuring terminal and a PC terminal for displaying and recording a temperature value. The temperature measuring terminal consists of a sensor, an interface circuit, a temperature controller, and a communication module, wherein the units are successively connected; and the communication terminal is connected with the PC terminal. According to the invention, the temperature measuring device is used for measuring a temperature change caused by laser on a living body or inside a tissue and thus a heating effect on the living body by the laser is analyzed. Meanwhile, the temperature measuring device also can be used for measurement of a temperature change of a biological tissue due to microwave radiation or measurement on living bodies on other occasions. The rapid thermocouple temperature measuring device with high temperature measuring precision is suitable for the medical technical field.
Description
Technical field
The present invention relates to biomedical engineering field, particularly relate to a kind of fast thermocouple temperature measuring equipment.
Background technology
In recent years, along with the development of laser technology, high power pulse laser has more and more been applied in the treatment of section office's relevant diseases such as the department of stomatology, beauty treatment section, ophthalmology and department of dermatologry.But in clinical practice application, the exposure dose of these laser instrument in corresponding biological tissue is only controlled by the practical experience of clinician.But this control only rested in perceptual knowledge is often coarse, the malpractice caused by hot injury is also just adjoint.
The feature of laser pain stimulus technology be not with contact skin, mechanoreception can not be stimulated neural, and accurately can draw electrophysiology data, be the method the most effectively detecting neuralgia.The shell temperature of laser-irradiated domain is an important parameter of laser pain stimulus technology.
At present, the sensor that can be used for the measurement of illuminated skin surface temperature mainly contains three kinds, thermal infrared imager, online infrared radiation thermometer and thermocouple temperature measurement instrument.
1, online infrared imaging instrument body is long-pending comparatively greatly, it is expensive, and test is subject to the impact of environment noise.
2, the optical resolution of online infrared radiation thermometer determines its temperature-measuring range is face thermometric, and the size of point for measuring temperature changes with irradiation distance.At the point for measuring temperature of laser when less or temperature distributing disproportionation, temperature data accurately cannot be recorded, and easily receive the impact of scattered light.
3, there is thermo-optic effect in common thermocouple temperature measurer, affects quick temperature measurement credible, and thermocouple can direct absorbing laser energy thus cause energy cannot be directly transferred on skin.
In order to study the temperature-responsive situation that intense pulse laser causes on organism, improve Pulsed Laser to the therapeutic effect of disease, reduce the risk that malpractice occurs, be necessary to research and develop a kind of special quick temperature measurement equipment, to realize the record of temperature variations and the control to laser instrument caused by paired pulses laser irradiating biological body.
CN201220506212.3 discloses a kind of electric thermo-couple temperature test instrumentation with network interface, and the main application direction of this patent is more dangerous or the application in bad environments field and lightning Protection Design; Do not make design to thermocouple type selecting targetedly in its technical scheme, sampling rate, sampling precision are poor, and noise is larger.
CN201310677102.2 discloses a kind of thermocouple automatic thermometric analytical method based on Labview and system, be applicable to heat treatment and field of industrial production, temperature value after instantaneous temperature speed and filtering cannot be calculated fast, what its technical scheme adopted is mode of operation and the NI data collecting card of Labview, its weak point goes out to be that its data acquisition program is loaded down with trivial details, equipment cost is high, can not be applicable to medical field and use.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art, and provide a kind of for fast thermocouple temperature measuring equipment that is quick, the variations in temperature of Laser Measurement irradiating surface in real time.
The technical scheme adopted for realizing object of the present invention is: a kind of fast thermocouple temperature measuring equipment, it is characterized in that comprising thermometric end and the PC end for showing and record temperature value;
Described thermometric end comprises the sensor, interface circuit, temperature controller and the communication module that carry out successively connecting; Described communication module is held with described PC and is connected;
Described sensor is armoured thermocouple;
Described interface circuit is form thermocouple temperature measurement interface and A/D convertor circuit by ADS1224 and ADS620;
Described temperature controller is provided with single chip circuit system, the temperature value of sampling and read is sent to described PC by described communication module and holds;
Described communication module is provided with RS485 serial ports;
Described PC end is provided with RS485/RS232 transducer.
Preferably, described temperature controller is also connected with trigger end.
Preferably, described temperature controller is also connected with by the warning end of Control and control end.
Operation principle of the present invention is: thermocouple temperature measuring apparatus is for measuring by laser on organism or the variations in temperature that causes of organization internal, thus the heat effect of laser on organism is analyzed, this temperature measuring device also can be used for the occasion that the measurement of biological tissue's variations in temperature that microwave radiation causes or other needs carry out thermometric on organism simultaneously, and temperature measurement accuracy is high;
Compared with prior art, the invention has the beneficial effects as follows:
(1) the thermometric end of thermocouple temperature measuring apparatus is armoured thermocouple, and point for measuring temperature can be made to be close to tissue, and due to point for measuring temperature very little, therefore can not stop the irradiation of laser, its error is less; The sample frequency of this armoured thermocouple is 60Hz, and temperature measurement accuracy is 0.25 DEG C, can realize paired pulses laser and cause the variations in temperature of tissue to carry out measuring and record, be applicable to biomedical sector;
(2) the present invention can measure the accurate temperature value that the fastest response time is 20ms, can measure the details of the transient change of the skin surface temperature field of causing due to the most short pulse duration pulse laser that is 1ms;
(3) present invention also offers the warning end being applicable to medical field and control end; Described warning end is by Control, can carry out glistening and buzzer warning according to practical situation; Such as, after setting pain threshold and damage threshold, as tested organism surface surface temperature exceeds threshold value, will trigger alarm signals, thus the malpractice avoided being damaged by heat radiation and cause; Described trigger end can control by paired pulses laser instrument, to guarantee the safety for the treatment of further, to realize the record analysis of multiple types data compound.
Accompanying drawing explanation
Figure 1 shows that a kind of anatomical connectivity relation block diagram of fast thermocouple temperature measuring equipment;
Figure 2 shows that the sampling routine interface that PC holds.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment:
Be illustrated in figure 1 a kind of anatomical connectivity relation block diagram of fast thermocouple temperature measuring equipment, comprise thermometric end and the PC end for showing and record temperature value.
Described thermometric end comprises the sensor, interface circuit, temperature controller and the communication module that carry out successively connecting; Described communication module is held with described PC and is connected;
Described sensor is armoured thermocouple, and further preferably model is the armouring pin silk thermocouple of 0.5mm and 0.25mm.Its temperature-responsive time of the thermocouple of this model, its thermometric end was very tiny only within 5-20ms, and it is very little that what paired pulses laser irradiated and brought block error.
Described interface circuit is form thermocouple temperature measurement interface and A/D convertor circuit by ADS1224 and ADS620; Find through overtesting, this interface circuit can reach the sampling rate of the fastest 240SPS (samplepersecond).Fast thermocouple temperature measuring equipment uses the sampling rate of 60SPS, can further improve sampling precision by the mode of over-sampling and reduce noise, improves signal to noise ratio.
Described temperature controller is provided with single chip circuit system, the temperature value of sampling and read is sent to described PC by described communication module and holds; Described communication module is provided with RS485 serial ports; Described PC end is provided with RS485/RS232 transducer.
Preferably, described temperature controller is also connected with trigger end.
Preferably, described temperature controller is also connected with by the warning end of Control and control end.
The work process of fast thermocouple temperature measuring equipment provided by the invention is: the temperature control being pre-set target temperature by PC end and preset, and utilizes supporting power supply adjustment control voltage value.By the PIN1 of this power control voltage port access semiconductor laser power supply rear board external controlled interface, 2 pins, and be aided with suitable Laser Power Devices and arrange, when not cut-in temperature controller, can control the power of Output of laser.When non-Offered target temperature value, this control voltage is 1.30V, can avoid too low by output voltage and power work that is that cause is abnormal like this.After Offered target temperature value, the control voltage of the temperature that temperature controller can gather based on self and output forms feedback circuit and realizes temperature control.Because the design cycle of temperature controller programme control circut is longer, so adopt the thermocouple of this temperature control type, suitable temperature-controlled process can be found out as early as possible, shorten the time of research and development.The communication modes of temperature controller is RS485 communication, is resolved by algorithm, and its certainty of measurement can reach 0.1 DEG C.In addition, for preventing malpractice, temperature control type Thermocouple module can set function of safety protection: after carrying out control 5s, if temperature is unchanged or obviously raise, then closing control voltage exports.
RS485 patten transformation is RS232 communication mode by the temperature data that PC end adopts RS485/RS232 transducer record to collect, and based on RS232 serial ports Automatic Program record temperature data.The sampling interval duration of serial ports program can by user's sets itself.After beginning thermometric, the sampling routine meeting of PC end and the single-chip microcomputer of temperature controller form response, constantly send and order and receive temperature data.Meanwhile, real-time for the temperature value read being converted to metric temperature value and being presented at PC can be held on screen by this program.After thermometric terminates, measured data will be stored as csv file in order, carry out processed to facilitate with excel software.The minimum sampling interval of preferred setting is 10ms, if the sampling interval is less than 10ms, will occur serious miscommunication.The sampling routine interface of PC end as shown in Figure 2.
Application example: fast thermocouple temperature measuring equipment loads warning end and the control end of Control, realizes the control in the hemangioma pulse laser solidification treatment of oral cavity; Fast thermocouple temperature measuring equipment carries out thermometric on isolated skin surface and different depth, to analyze pulsed laser irradiation caused thermo parameters method on skin; When skin surface temperature is more than 43 DEG C (Pain receptor activationary temperature), fast thermocouple temperature measuring equipment coordinates eeg recording instrument to carry out the synchronous recording of pain stimulus.
In addition, the some defects based on Labview temp measuring method are had: the data collecting card of (1) NI is expensive in prior art, and our whole system is achieving under the fastest sample rate is the performance of 60sps, its cost is far below the mode of operation adopting NI data collecting card and Labview; (2) for medical and experiment field, the PC that the present invention uses holds software system to programme based on VB, be designed to, after automatically reading and storing data (the longest by 65535,54 minutes writing times), be converted to csv file and utilize excel to analyze to facilitate.In the csv file generated, algorithm can be utilized to calculate after instantaneous temperature speed, filtering temperature value etc.Meanwhile, the PC that the present invention uses holds the display interface of software system to expand, and current temperature value, maximum temperature value display etc. also can realize.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a fast thermocouple temperature measuring equipment, is characterized in that comprising thermometric end and the PC end for showing and record temperature value;
Described thermometric end comprises the sensor, interface circuit, temperature controller and the communication module that carry out successively connecting; Described communication module is held with described PC and is connected;
Described sensor is armoured thermocouple;
Described interface circuit is form thermocouple temperature measurement interface and A/D convertor circuit by ADS1224 and ADS620;
Described temperature controller is provided with single chip circuit system, the temperature value of sampling and read is sent to described PC by described communication module and holds;
Described communication module is provided with RS485 serial ports;
Described PC end is provided with RS485/RS232 transducer.
2. a kind of fast thermocouple temperature measuring equipment according to claim 1, is characterized in that described temperature controller is also connected with trigger end.
3. a kind of fast thermocouple temperature measuring equipment according to claim 1, is characterized in that described temperature controller is also connected with by the warning end of Control and control end.
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| CN201510670538.8A CN105249935A (en) | 2015-10-15 | 2015-10-15 | Rapid thermocouple temperature measuring device |
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| CN201510670538.8A CN105249935A (en) | 2015-10-15 | 2015-10-15 | Rapid thermocouple temperature measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969857A (en) * | 2017-05-23 | 2017-07-21 | 中国计量大学 | A kind of device for measuring the hot thermocouple response time |
| CN114749796A (en) * | 2022-05-11 | 2022-07-15 | 南京理工大学 | Device and method for welding biological tissue by using double-beam laser |
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| CN2149898Y (en) * | 1992-03-27 | 1993-12-22 | 中国医学科学院生物医学工程研究所 | Moxaburner-temp. biological-feedback instrument |
| CN202947808U (en) * | 2012-10-25 | 2013-05-22 | 中钢集团邢台机械轧辊有限公司 | Temperature alarm device of fast temperature measuring gun |
| CN103519791A (en) * | 2013-10-24 | 2014-01-22 | 江苏美伦影像***有限公司 | System and method for collecting human body temperature |
| CN205094414U (en) * | 2015-10-15 | 2016-03-23 | 中国医学科学院生物医学工程研究所 | Quick thermal couple temperature device |
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2015
- 2015-10-15 CN CN201510670538.8A patent/CN105249935A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85106493A (en) * | 1985-08-31 | 1987-03-18 | 同济大学 | The real-time display recorder of multiple spot deep body temperature microcomputer |
| CN88203279U (en) * | 1988-02-11 | 1988-09-21 | 电子工业部第九研究所 | Intelligent temp. controller |
| CN2149898Y (en) * | 1992-03-27 | 1993-12-22 | 中国医学科学院生物医学工程研究所 | Moxaburner-temp. biological-feedback instrument |
| CN202947808U (en) * | 2012-10-25 | 2013-05-22 | 中钢集团邢台机械轧辊有限公司 | Temperature alarm device of fast temperature measuring gun |
| CN103519791A (en) * | 2013-10-24 | 2014-01-22 | 江苏美伦影像***有限公司 | System and method for collecting human body temperature |
| CN205094414U (en) * | 2015-10-15 | 2016-03-23 | 中国医学科学院生物医学工程研究所 | Quick thermal couple temperature device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969857A (en) * | 2017-05-23 | 2017-07-21 | 中国计量大学 | A kind of device for measuring the hot thermocouple response time |
| CN114749796A (en) * | 2022-05-11 | 2022-07-15 | 南京理工大学 | Device and method for welding biological tissue by using double-beam laser |
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