CN111552275A - Temperature control calibration device, temperature control equipment and method thereof - Google Patents
Temperature control calibration device, temperature control equipment and method thereof Download PDFInfo
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- CN111552275A CN111552275A CN202010429938.0A CN202010429938A CN111552275A CN 111552275 A CN111552275 A CN 111552275A CN 202010429938 A CN202010429938 A CN 202010429938A CN 111552275 A CN111552275 A CN 111552275A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The invention discloses a temperature control calibration device, a temperature control device and a temperature control method. The A/D converter comprises a plurality of input channels, differential pressure signals at two ends of the thermistor and the calibration resistor are input, and the differential pressure signals at two ends of the thermistor and the calibration resistor are amplified and subjected to analog-to-digital conversion respectively to obtain current thermosensitive digital signals and calibration digital signals correspondingly. Obtaining relation R based on thermistor value before improvementPT＝K*Code,K＝Vref/(2n*PGA*IDAC) And the thermistor and the calibration resistor share the reference source, the constant current source and the signal amplifier of the A/D converter, and the K values corresponding to the thermistor and the calibration resistor are the same. And based on the resistance R of the calibration resistor0Constant, i.e. the resistance of the calibration resistor is substantially unaffected by ambient temperature, so the controller follows the relation K0＝R0The current calibration digital signal can obtain more accurate K value according to the relation RPT＝K0The current thermosensitive digital signal can obtain more accurate resistance value of the thermistor, so that the resistance value can be obtained according to the resultThe temperature value can be accurately obtained by setting the resistance value and temperature corresponding relation, and the temperature control accuracy of the temperature control equipment is further improved.
Description
Technical Field
The invention relates to the field of temperature control, in particular to a temperature control calibration device, temperature control equipment and a temperature control method.
Background
For a blood cell analyzer, the reagent and the sample are sensitive to the reaction temperature, so in general, the reagent, the counting cell and the reaction cell need to be maintained at a constant temperature, for example, the reagent needs to be preheated to 37 + -1 ℃, the temperature of the counting cell needs to be maintained at 37 + -1 ℃, and the heating temperature of the reaction cell needs to reach 37 + -1 ℃.
At present, in order to realize the temperature fine control of the heating module and the heat preservation module of the blood cell analyzer, a temperature control device as shown in fig. 1 is arranged for the heating module and the heat preservation module, and the temperature control principle is as follows: the thermistor is placed at a temperature detection point, the voltage at two ends of the thermistor is subjected to analog-to-digital conversion through an analog/digital (A/D) converter and then is transmitted to the controller, and the controller controls the running state of the temperature adjusting device for adjusting the temperature of the temperature detection point through the temperature fed back by the thermistor so as to keep the temperature of the temperature detection point constant.
Specifically, the process of acquiring the temperature fed back by the thermistor by the controller is as follows: 1) the voltage at two ends of the thermistor is connected to analog input ports AIN0 and AIN1 of the A/D converter, the current of the thermistor is provided by a constant current source integrated in the A/D converter, and the resistance value of the thermistor is represented as RPT＝UAIN0-AIN1/IDACWherein, UAIN0-AIN1Is the voltage difference across the thermistor, IDACIs the current flowing through the thermistor. 2) The A/D converter amplifies the differential pressure signal at two ends of the thermistor by an internal signal amplifier, and the amplified differential pressure signal is expressed as UPGA＝UAIN0-AIN1PGA, wherein the PGA is an amplification factor of the signal amplifier. 3) The A/D converter performs analog-to-digital conversion on the amplified differential pressure signal through an internal ADC circuit and outputs a digital signal Code to the controller, and the digital signal is expressed as Code UPGA*2nand/Vref, wherein Vref is the reference source voltage of the A/D converter, and n is the effective digit of the A/D converter. 4) The controller obtains a relation R based on a preset resistance valuePT＝Vref*Code/(2n*PGA*IDAC) And calculating the resistance value of the thermistor, and obtaining a temperature value corresponding to the resistance value of the thermistor based on a preset resistance value temperature corresponding relation.
Therefore, the key link for accurately acquiring the temperature fed back by the thermistor by the controller is to accurately acquire the resistance value of the thermistor, but parameters Vref, PGA and I involved in calculating the resistance value of the thermistorDACThe adopted device default value (constant value) is adopted, and the three parameters can be continuously changed due to temperature drift and the like during actual work, so that the resistance value of the thermistor calculated by the controller is greatly different from the actual resistance value, the error of the temperature value obtained by the controller is large, and the temperature control accuracy of the temperature control equipment is further reduced.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a temperature control calibration device, temperature control equipment and a method thereof, which are based on a relation K0＝R0The current calibration digital signal can obtain more accurate K value according to the relation RPT＝K0The current thermosensitive digital signal can obtain a relatively accurate resistance value of the thermistor, so that a relatively accurate temperature value can be obtained according to a preset resistance value temperature corresponding relation, and the temperature control accuracy of the temperature control equipment is improved.
In order to solve the above technical problem, the present invention provides a temperature control calibration apparatus, including:
a calibration resistor with a constant resistance value;
the A/D converter comprises a plurality of input channels, the input channels are respectively connected with the thermistor and the calibration resistor, and the A/D converter is used for respectively amplifying and performing analog-to-digital conversion on differential pressure signals at two ends of the thermistor and the calibration resistor to correspondingly obtain a thermosensitive digital signal and a calibration digital signal;
a controller connected with the A/D converter and used for correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPTObtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation; wherein R is0For calibrating the resistanceResistance value of (1), Code0For the calibration digital signal, Code is the thermosensitive digital signal;
the thermistor and the calibration resistor share a reference source, a constant current source and a signal amplifier of the A/D converter.
Preferably, the a/D converter includes:
a channel selection circuit connected to the multiple input channels, respectively;
the main control module is connected with the channel selection circuit and used for controlling the channel selection circuit to poll and conduct the signal transmission line of each group of input channels when in work so as to sequentially output the differential pressure signals input by each group of input channels in each polling period;
the signal amplifier is connected with the channel selection circuit and is used for amplifying the currently input differential pressure signal to obtain a differential pressure amplification signal;
the ADC circuit is respectively connected with the signal amplifier and the channel selection circuit and is used for carrying out analog-to-digital conversion on the differential pressure amplification signal to obtain a differential pressure digital signal, and the channel number currently selected by the channel selection circuit and the differential pressure digital signal are combined and encoded to obtain the differential pressure digital signal with the channel number;
correspondingly, the controller is specifically configured to determine the thermosensitive digital signal and the calibration digital signal corresponding to the current polling cycle according to the differential pressure digital signal with the channel number, and correct the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance value R of the thermistor in the current polling periodPT(ii) a Among them, Code0The Code is a calibration digital signal corresponding to the current polling period, and the Code is a thermal sensitive digital signal corresponding to the thermistor in the current polling period.
Preferably, the signal amplifier is specifically a PGA connected to the main control module;
correspondingly, the main control module is further configured to determine, in advance, signal gain requirements corresponding to each group of input channels according to differential pressure signal ranges required to be transmitted by different groups of input channels and the input signal range of the ADC circuit, to obtain a channel number gain correspondence between channel numbers and the signal gain requirements, and control the signal amplifier to be in a gain state corresponding to a channel number currently selected to be turned on by the channel selection circuit according to the channel number gain correspondence.
Preferably, the input channels of the a/D converter include at least 3 sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor;
and the thermistor includes:
a first thermistor arranged at a temperature detection point corresponding to a reagent of the blood cell analyzer;
the second thermistor is arranged at a temperature detection point corresponding to a counting cell of the blood cell analyzer;
and the third thermistor is arranged at a temperature detection point corresponding to the reaction pool of the blood cell analyzer.
Preferably, the controller is specifically configured to obtain the temperature correspondence formula R according to a preset resistance valuePT＝R0℃(1+AT+BT2-100CT3+CT4) Calculating the resistance R of the thermistorPTA corresponding temperature value T; wherein R is0℃The resistance value of the thermistor at 0 ℃ is a preset coefficient value A, B, C.
In order to solve the technical problem, the invention also provides a temperature control device, which comprises any one of the temperature control calibration devices; further comprising:
a thermistor arranged at the temperature detection point;
the temperature adjusting device is connected with the controller and is used for adjusting the temperature of the temperature detecting point corresponding to the thermistor;
correspondingly, the controller is further configured to control the operating state of the temperature adjusting device according to the temperature value corresponding to the resistance value of the thermistor, so that the temperature of the temperature detection point is kept within a preset temperature control range.
Preferably, the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; wherein N is an integer greater than 1;
correspondingly, the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors;
the controller is specifically used for presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively; and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
Preferably, the thermistor comprises three thermistors respectively arranged at temperature detection points corresponding to a reagent, a counting cell and a reaction cell of the blood cell analyzer.
In order to solve the above technical problem, the present invention further provides a temperature control calibration method, which is applied to any one of the above temperature control calibration apparatuses, and includes:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermistor digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0Code for the resistance of the calibration resistor0For the calibration digital signal, Code is the thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation.
In order to solve the above technical problem, the present invention further provides a temperature control method applied to any one of the above temperature control devices, including:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermistor digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0Code for the resistance of the calibration resistor0For the calibration digital signal, Code is the thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation, and controlling the running state of the temperature regulating device according to the temperature value so as to keep the temperature of the temperature detection point corresponding to the thermistor within a preset temperature control range.
Preferably, the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors; wherein N is an integer greater than 1;
correspondingly, the process of controlling the operating state of the temperature adjusting device according to the temperature value to keep the temperature of the temperature detecting point corresponding to the thermistor within the preset temperature control range includes:
presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively;
and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
The invention provides a temperature control calibration device, which comprises a calibration resistor, an A/D converter and a controller. The A/D converter comprises a plurality of input channels, differential pressure signals at two ends of the thermistor and the calibration resistor are input, and the differential pressure signals at two ends of the thermistor and the calibration resistor are amplified and subjected to analog-to-digital conversion respectively to obtain current thermosensitive digital signals and calibration digital signals correspondingly. Obtaining relation R based on thermistor value before improvementPT＝K*Code,K＝Vref/(2n*PGA*IDAC) And the thermistor and the calibration resistor share the reference source, the constant current source and the signal amplifier of the A/D converter, and the K values corresponding to the thermistor and the calibration resistor are the same. And based on the resistance R of the calibration resistor0Constant, i.e. the resistance of the calibration resistor is substantially unaffected by ambient temperature, so the controller follows the relation K0＝R0The current calibration digital signal can obtain more accurate K value according to the relation RPT＝K0The current thermosensitive digital signal can obtain a relatively accurate resistance value of the thermistor, so that a relatively accurate temperature value can be obtained according to a preset resistance value temperature corresponding relation, and the temperature control accuracy of the temperature control equipment is improved.
The invention also provides a temperature control calibration method, a temperature control device and a temperature control method, which have the same beneficial effects as the temperature control calibration device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a temperature control apparatus in the background art;
fig. 2 is a schematic structural diagram of a temperature control calibration apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a temperature control calibration apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a temperature control device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a temperature adjustment device according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a temperature control calibration device, a temperature control device and a temperature control deviceMethod according to the relation K0＝R0The current calibration digital signal can obtain more accurate K value according to the relation RPT＝K0The current thermosensitive digital signal can obtain a relatively accurate resistance value of the thermistor, so that a relatively accurate temperature value can be obtained according to a preset resistance value temperature corresponding relation, and the temperature control accuracy of the temperature control equipment is improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a temperature control calibration apparatus according to an embodiment of the present invention.
This control by temperature change calibrating device includes:
a constant-value calibration resistor R0;
the A/D converter 1 comprises a plurality of input channels, the input channels are respectively connected with the thermistor and the calibration resistor R0, and the A/D converter 1 is used for respectively amplifying and carrying out analog-to-digital conversion on differential pressure signals at two ends of the thermistor and the calibration resistor R0 to correspondingly obtain a thermosensitive digital signal and a calibration digital signal;
a controller 2 connected to the A/D converter 1 for correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPTObtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation; wherein R is0To calibrate the resistance of the resistor, Code0For calibrating the digital signal, Code is a thermosensitive digital signal;
the thermistor and the calibration resistor R0 share the reference source, the constant current source and the signal amplifier of the a/D converter 1.
Specifically, the temperature control calibration device of the present application includes a calibration resistor R0, an a/D converter 1, and a controller 2, and the operating principle thereof is as follows:
the a/D converter 1 of the present application comprises a plurality of input channels for the purpose of inputting a plurality of differential pressure signals consisting of differential pressure signals across a thermistor and a calibration resistor R0. The process of the A/D converter 1 for processing the differential pressure signal across the thermistor/calibration resistor is as follows: 1) the voltage at two ends of the thermistor/calibration resistor is connected to analog input ports AINa and AINb of A/D converter 1, and the current of thermistor/calibration resistor is provided by constant current source integrated in A/D converter 1, so that the resistance of thermistor/calibration resistor is expressed as R ═ UAINa-AINb/IDACWherein, UAINa-AINbFor temperature sensing/calibrating the voltage difference across the resistor, IDACIs the current flowing through the thermistor/calibration resistor. 2) The A/D converter 1 amplifies the differential pressure signal at two ends of the thermal sensitive/calibration resistor by an internal signal amplifier, and the amplified differential pressure signal is represented as UPGA＝UAINa-AINbPGA, wherein the PGA is an amplification factor of the signal amplifier. 3) The a/D converter 1 performs analog-to-digital conversion on the amplified differential pressure signal through an internal ADC circuit, and outputs a digital signal Code to the controller 2, where the digital signal is represented as Code ═ UPGA*2nand/Vref, where Vref is the reference source voltage of the A/D converter 1 and n is the number of significant bits of the A/D converter 1.
It can be seen that the relationship R ═ UAINa-AINb/IDAC、UPGA＝UAINa-AINb*PGA、Code＝UPGA*2nThe resistance R of the thermistor/calibration resistor is equal to Vref Code/(2)n*PGA*IDAC) And may also be expressed as R ═ K ═ Code, K ═ Vref/(2)n*PGA*IDAC)。
To distinguish the thermistor from the calibration resistor R0, the resistance of the thermistor is denoted as RPTThe resistance of the calibration resistor R0 is denoted as R0And the thermistor digital signal corresponding to the thermistor is represented as Code, and the calibration digital signal corresponding to the calibration resistor R0 is represented as Code0K value corresponding to the thermistor is represented by K, and K value corresponding to the calibration resistor R0 is represented by K0The resistance value of the thermistor is RPT＝K*Code,K＝Vref/(2n*PGA*IDAC) The calibration resistor R0 has a resistance value of R0＝K0*Code0,K0＝Vref/(2n*PGA*IDAC). It can be seen that, when the reference source, the constant current source, and the signal amplifier of the a/D converter 1 are shared by the thermistor and the calibration resistor R0, the K values corresponding to the thermistor and the calibration resistor R0 are the same.
Based on this, the calibration resistor R0 of the present application selects a resistor with a constant resistance value, specifically a resistor with high precision and low temperature drift, for example, the actual value of the calibration resistor R0 is 1K, the precision is 0.1%, the temperature drift coefficient is 10 ppm/deg.c, and the resistance value R is large0Is substantially unaffected by ambient temperature. Then utilize K0＝R0/Code0The accurate K value corresponding to the calibration resistor R0 can be obtained, and the thermistor and the calibration resistor R0 have the same K value, so that the R can be utilizedPT＝K0Code obtains the resistance value of the thermistor in a manner corresponding to RPT＝Vref*Code/(2n*PGA*IDAC) According to the obtaining mode, the resistance value is closer to the actual resistance value, and the temperature value corresponding to the resistance value of the thermistor obtained according to the preset resistance value temperature corresponding relation is more accurate.
The invention provides a temperature control calibration device, which comprises a calibration resistor, an A/D converter and a controller. The A/D converter comprises a plurality of input channels, differential pressure signals at two ends of the thermistor and the calibration resistor are input, and the differential pressure signals at two ends of the thermistor and the calibration resistor are amplified and subjected to analog-to-digital conversion respectively to obtain current thermosensitive digital signals and calibration digital signals correspondingly. Obtaining relation R based on thermistor value before improvementPT＝K*Code,K＝Vref/(2n*PGA*IDAC) And the thermistor and the calibration resistor share the reference source, the constant current source and the signal amplifier of the A/D converter, and the K values corresponding to the thermistor and the calibration resistor are the same. And based on the resistance R of the calibration resistor0Constant, i.e. the resistance of the calibration resistor is substantially unaffected by ambient temperature, so the controller follows the relation K0＝R0The current calibration digital signal can obtain more accurate K value according to the relation RPT＝K0The current thermosensitive digital signal can obtain a relatively accurate resistance value of the thermistor, so that a relatively accurate temperature value can be obtained according to a preset resistance value temperature corresponding relation, and the temperature control accuracy of the temperature control equipment is improved.
On the basis of the above-described embodiment:
referring to fig. 3, fig. 3 is a schematic structural diagram of a temperature control calibration apparatus according to an embodiment of the present invention.
As an alternative embodiment, the a/D converter 1 includes:
a channel selection circuit connected to the multiple input channels, respectively;
the main control module is connected with the channel selection circuit and is used for controlling the channel selection circuit to poll and conduct the signal transmission line of each group of input channels when in work so as to sequentially output the differential pressure signals input by each group of input channels in each polling period;
the signal amplifier is connected with the channel selection circuit and is used for amplifying the currently input differential pressure signal to obtain a differential pressure amplification signal;
the ADC circuit is respectively connected with the signal amplifier and the channel selection circuit and is used for carrying out analog-to-digital conversion on the differential pressure amplification signal to obtain a differential pressure digital signal, and the channel number currently selected by the channel selection circuit and the differential pressure digital signal are combined and encoded to obtain the differential pressure digital signal with the channel number;
correspondingly, the controller 2 is specifically configured to determine the thermal digital signal and the calibration digital signal corresponding to the current polling cycle according to the differential pressure digital signal with the channel number, and correct the relation R according to the preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistor in the current polling periodPT(ii) a Among them, Code0The Code is a calibration digital signal corresponding to the current polling period, and the Code is a thermal sensitive digital signal corresponding to the thermistor in the current polling period.
Specifically, the a/D converter 1 of the present application includes a channel selection circuit, a main control module, a signal amplifier, and an ADC circuit, and its working principle is:
the a/D converter 1 includes multiple input channels, and since the multiple input channels share the signal amplifier and the ADC circuit in the a/D converter 1, the a/D converter 1 can only process one input differential pressure signal at a time, and specifically, the internal channel selection circuit realizes the input selection of each differential pressure signal.
More specifically, the channel selection circuit is controlled by the main control module, and the main control module controls the channel selection circuit to poll and conduct the signal transmission line of each group of input channels when in work so as to sequentially output the differential pressure signals input by each group of input channels in each polling period. For example, the a/D converter 1 includes 8 input channels, AIN0-AIN7, AIN0 and AIN1 are used for inputting the first differential voltage signal, AIN2 and AIN3 are used for inputting the second differential voltage signal, AIN4 and AIN5 are used for inputting the third differential voltage signal, AIN6 and AIN7 are used for inputting the fourth differential voltage signal, and the main control module controls the channel selection circuit to poll the signal transmission lines of each set of input channels when in operation, that is, the channel conduction sequence is: AIN0-AIN1 → AIN2-AIN3 → AIN4-AIN5 → AIN6-AIN7 → AIN0-AIN1 → … …, and the output sequence of each differential pressure signal is as follows: first pressure difference signal → second pressure difference signal → third pressure difference signal → fourth pressure difference signal → first pressure difference signal → … ….
Since the polling cycle is short in time, usually in the order of ns, the differential pressure signals sequentially output in the same polling cycle are regarded as the differential pressure values of the differential pressure signals at the same time.
Based on this, the channel selection circuit sequentially outputs the differential pressure signals to the signal amplifier. The signal amplifier amplifies the currently input differential pressure signal to obtain a differential pressure amplified signal, and outputs the differential pressure amplified signal to the ADC circuit. The ADC circuit performs analog-to-digital conversion on the currently input differential pressure amplification signal to obtain a differential pressure digital signal, and meanwhile, considering that the A/D converter 1 needs to inform the controller 2 of which differential pressure signal is currently processed, the ADC circuit also determines a channel number currently selected by the channel selection circuit according to a high-low level signal of a channel transmission line in the channel selection circuit, combines and codes the channel number currently selected by the channel selection circuit and the differential pressure digital signal to obtain the differential pressure digital signal with the channel number, and outputs the differential pressure digital signal with the channel number to the controller 2.
Based on which channel of the a/D converter 1 is connected to the differential pressure signal across the thermistor and which channel is connected to the differential pressure signal across the calibration resistor R0, the controller 2 can determine, according to the differential pressure digital signal with the channel number, whether each differential pressure digital signal corresponds to the thermal digital signal converted from the differential pressure signal across the thermistor or the calibration digital signal converted from the differential pressure signal across the calibration resistor R0 in a complete polling cycle formed by the first channel and the last channel.
Based on the pressure difference signals sequentially output in the same polling cycle, the controller 2 recognizes the pressure difference values of the pressure difference signals at the same time, so that the controller 2 is based on the relational expression
K0＝R0Calibration digital signal Code corresponding to current polling period0The obtained K value can be used as the K value corresponding to each pressure difference signal in the current polling period according to
RPT＝K0And calculating the resistance value of the thermistor in the current polling period by the thermistor digital signal Code corresponding to the thermistor in the current polling period.
As an alternative embodiment, the signal amplifier is specifically a PGA connected to the main control module;
correspondingly, the main control module is further configured to determine, in advance, the signal gain requirement corresponding to each group of input channels according to the differential pressure signal range to be transmitted by the different groups of input channels and the input signal range of the ADC circuit, to obtain a channel number gain correspondence between the channel number and the signal gain requirement, and to control the signal amplifier to be in a gain state corresponding to the channel number currently selected to be turned on by the channel selection circuit according to the channel number gain correspondence.
Specifically, the signal Amplifier of the present application may be a PGA (programmable Gain Amplifier), and its Gain value is controlled by the main control module. Considering that the different differential pressure signals may have different magnitudes, and the subsequent ADC circuit has a certain requirement on the magnitude of the input signal, the signal gain requirements of the different differential pressure signals may be different. Based on this, the main control module of the application determines the signal gain requirement corresponding to each group of input channels in advance according to the differential pressure signal range required to be transmitted by different groups of input channels and the input signal range of the ADC circuit, thereby setting and storing the channel number gain corresponding relation between the channel number and the signal gain requirement in advance, aiming at determining the signal target gain requirement corresponding to the currently selected channel number of the channel selection circuit according to the channel number gain corresponding relation, and controlling the gain state of the signal amplifier according to the signal target gain requirement, so that the signal size input to the ADC circuit meets the requirement.
As an alternative embodiment, the input channels of the a/D converter include at least 3 sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor;
and the thermistor includes:
a first thermistor arranged at a temperature detection point corresponding to a reagent of the blood cell analyzer;
the second thermistor is arranged at a temperature detection point corresponding to a counting cell of the blood cell analyzer;
and the third thermistor is arranged at a temperature detection point corresponding to the reaction pool of the blood cell analyzer.
Specifically, the a/D converter 1 of the present application is at least provided for inputting 4 differential pressure signals, and specifically can input a differential pressure signal at two ends of a calibration resistor R0 and a differential pressure signal at two ends of at least three thermistors, that is, the input channel of the a/D converter includes at least 3 sets of measurement channels for measuring differential pressure signals at two ends of the thermistors and 1 set of calibration channels for measuring differential pressure signals at two ends of the calibration resistor, wherein the three thermistors can be used for temperature control service of the blood cell analyzer, and are respectively disposed at temperature detection points corresponding to a reagent, a counting cell and a reaction cell (e.g., a CRP (C-reactive protein) reaction cell), thereby achieving simultaneous calibration of resistance values of the three thermistors by one calibration resistor R0.
In addition, the a/D converter 1 of the present application may select the ADS1248, and the ADS1248 is modified according to the operating principle of the a/D converter 1, which is not limited herein.
As an alternative embodiment, the controller is specifically configured to correspond to the formula R according to a preset resistance temperaturePT＝R0℃(1+AT+BT2-100CT3+CT4) Calculating resistance R of thermistorPTA corresponding temperature value T; wherein R is0℃The resistance value of the thermistor at 0 ℃ is a preset coefficient value A, B, C.
Specifically, the resistance temperature corresponding relation of the present application can be set as RPT＝R0℃(1+AT+BT2-100CT3+CT4) Therefore, a more accurate temperature value can be obtained according to the corresponding relation of the resistance value and the temperature, wherein the coefficient value of A, B, C is determined by the specific type of the thermistor. For example, PT1000 may be used as the thermistor of the present application, and a is 3.81 × 10-3，B＝-6.02*10-7，C＝-6.0*10-12. In addition, since the coefficient values of B and C are small relative to A, the resistance temperature correspondence can be simplified as: rPT＝R0℃(1+AT+BT2-100CT3+CT4)≈R0℃(1+ AT), simplifying the operation.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a temperature control device according to an embodiment of the present invention.
The temperature control equipment comprises any one of the temperature control calibration devices; further comprising:
a thermistor arranged at the temperature detection point;
the temperature adjusting device 3 is connected with the controller 2 and is used for adjusting the temperature of the temperature detecting point corresponding to the thermistor;
correspondingly, the controller 2 is further configured to control the operating state of the temperature adjustment device 3 according to the temperature value corresponding to the resistance value of the thermistor, so that the temperature of the temperature detection point is kept within the preset temperature control range.
Specifically, the temperature control device of the present application includes a thermistor, a calibration resistor R0, an a/D converter 1, a controller 2, and a temperature adjustment device 3, and its operating principle is:
after obtaining the temperature value corresponding to the resistance value of the thermistor, the controller 2 controls the operating state of the temperature adjusting device 3 according to the obtained temperature value, so that the temperature adjusting device 3 adjusts the temperature of the temperature detection point corresponding to the thermistor, and the temperature is kept within the preset temperature control range.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a temperature adjustment device according to an embodiment of the present invention.
As an alternative embodiment, the temperature adjusting device 3 includes a first switch tube Q1, a second switch tube Q2, a first resistor R1, a second resistor R2, and a temperature adjusting element H; wherein:
the control end of the first switching tube Q1 is connected with the controller 2, the first end of the first switching tube Q1 is connected with the first end of a first resistor R1, the second end of the first switching tube Q1 is grounded, the second end of the first resistor R1 is respectively connected with the first end of a second resistor R2 and the control end of a second switching tube Q2, the second end of the second resistor R2 is connected with the first end of the second switching tube Q2, the common end of the second resistor R2 is connected with a direct current power supply, the second end of the second switching tube Q2 is connected with the first end of the temperature adjusting element H, and the second end of the temperature adjusting element H is grounded; the on-off states of the first switch tube Q1 and the second switch tube Q2 are the same;
correspondingly, the controller 2 is specifically configured to adjust a duty ratio of a driving signal for controlling the on-off condition of the first switching tube Q1 according to a temperature value corresponding to the resistance value of the thermistor, so that the temperature of the temperature detection point is kept within a preset temperature control range.
Specifically, the temperature adjustment device 3 of the present application includes a first switch tube Q1, a second switch tube Q2, a first resistor R1, a second resistor R2, and a temperature adjustment element H, and the working principle is described by taking the example that the first switch tube Q1 is an NMOS tube and the second switch tube Q2 is a PMOS tube:
the controller 2 outputs a PWM (Pulse width modulation) signal to the control terminal of the first switch tube Q1, and the first switch tube Q1 is turned on when a high level signal is input to the control terminal and turned off when a low level signal is input to the control terminal. When the first switch Q1 is turned off, the control terminal of the second switch Q2 inputs the voltage signal of the dc power VCC (e.g., 24V), and the second switch Q2 is turned off; when the first switch Q1 is turned on, the control terminal of the second switch Q2 inputs the voltage signal across the first resistor R1. Since the on-off states of the first switch tube Q1 and the second switch tube Q2 are the same, and the second switch tube Q2 is turned off when a high level signal is input to the control terminal and turned on when a low level signal is input to the control terminal, when the voltage division of the first resistor R1 and the second resistor R2 is set, the voltage signal at the two ends of the first resistor R1 is ensured to be small enough, so that the second switch tube Q2 can be turned on. When the second switching tube Q2 is conducted, the temperature adjusting element H is electrified and enters a heating state; when the second switching tube Q2 is turned off, the temperature adjusting element H is powered off and exits from the heating state, so that the operating state of the temperature adjusting element H can be controlled by adjusting the on-off condition of the second switching tube Q2 to perform the temperature adjusting function, i.e., the controller 2 adjusts the temperature by adjusting the duty ratio of the PWM signal for controlling the on-off condition of the first switching tube Q1.
More specifically, the controller 2 of the present application may be an FPGA (Field Programmable Gate Array) that transmits digital signals with the a/D converter 1 through an SPI (Serial Peripheral Interface) bus.
As an alternative embodiment, the temperature regulation device 3 further comprises:
and a reverse diode D, the anode of which is connected with the second end of the temperature adjusting element H, and the cathode of which is connected with the first end of the temperature adjusting element H.
Further, the temperature adjusting device 3 of the present application further includes a backward diode D, and the backward diode D can absorb a part of current when the current of the temperature adjusting element H is too large, so as to prevent the current of the temperature adjusting element H from being too large, and play a role in element protection.
As an alternative, the temperature control element H is embodied as a liquid pump or a heating film.
Specifically, the temperature control element H of the present application may be a liquid pump or a heating film, and the present application is not particularly limited thereto, depending on the actual situation.
As an alternative embodiment, the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; wherein N is an integer greater than 1;
correspondingly, the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors;
the controller is specifically used for presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively; and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
Specifically, the input channels of the a/D converter of the present application include multiple sets of measurement channels for measuring differential pressure signals at two ends of the thermistor and 1 set of calibration channels for measuring differential pressure signals at two ends of the calibration resistor, where each thermistor corresponds to one temperature detection point, and each temperature detection point corresponds to one temperature adjustment device, so as to ensure that the temperature of each temperature detection point is kept within its corresponding temperature control range.
More specifically, the temperature control principle of the different temperature detection points is as follows: the controller sets temperature control ranges of the temperature detection points corresponding to the plurality of thermistors in advance, so as to correspondingly control the running state of the temperature adjusting device corresponding to each thermistor according to the temperature value corresponding to the resistance value of each thermistor, thereby keeping the temperature of the temperature detection point corresponding to each thermistor in the corresponding temperature control range.
As an alternative embodiment, the thermistor comprises three thermistors which are respectively arranged at temperature detection points corresponding to a reagent, a counting cell and a reaction cell of the blood cell analyzer.
For the rest of the descriptions of the temperature control device provided in the present application, reference is made to the embodiments of the temperature control calibration device described above, and details are not repeated herein.
The application also provides a temperature control calibration method, which is applied to any one of the temperature control calibration devices, and comprises the following steps:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermosensitive digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0To calibrate the resistance of the resistor, Code0For calibrating the digital signal, Code is a thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to the preset resistance value temperature corresponding relation.
For the introduction of the temperature control calibration method provided in the present application, reference is made to the above embodiments of the temperature control calibration device, which are not repeated herein.
The application also provides a temperature control method, which is applied to any one of the temperature control devices, and comprises the following steps:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermosensitive digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0To calibrate the resistance of the resistor, Code0For calibrating the digital signal, Code is a thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to the preset resistance value temperature corresponding relation, and controlling the running state of the temperature regulating device according to the temperature value so as to keep the temperature of the temperature detection point corresponding to the thermistor within a preset temperature control range.
As an alternative embodiment, the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors; wherein N is an integer greater than 1;
correspondingly, the process of controlling the running state of the temperature regulating device according to the temperature value so as to keep the temperature of the temperature detection point corresponding to the thermistor within the preset temperature control range comprises the following steps:
presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively;
and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
For introduction of the temperature control method provided in the present application, reference is made to the above embodiments of the temperature control device, which are not repeated herein.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A temperature control calibration device, comprising:
a calibration resistor with a constant resistance value;
the A/D converter comprises a plurality of input channels, the input channels are respectively connected with the thermistor and the calibration resistor, and the A/D converter is used for respectively amplifying and performing analog-to-digital conversion on differential pressure signals at two ends of the thermistor and the calibration resistor to correspondingly obtain a thermosensitive digital signal and a calibration digital signal;
a controller connected with the A/D converter and used for correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPTObtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation; wherein R is0Code for the resistance of the calibration resistor0For the calibration digital signal, Code is the thermosensitive digital signal;
the thermistor and the calibration resistor share a reference source, a constant current source and a signal amplifier of the A/D converter.
2. The temperature controlled calibration device of claim 1, wherein the a/D converter comprises:
a channel selection circuit connected to the multiple input channels, respectively;
the main control module is connected with the channel selection circuit and used for controlling the channel selection circuit to poll and conduct the signal transmission line of each group of input channels when in work so as to sequentially output the differential pressure signals input by each group of input channels in each polling period;
the signal amplifier is connected with the channel selection circuit and is used for amplifying the currently input differential pressure signal to obtain a differential pressure amplification signal;
the ADC circuit is respectively connected with the signal amplifier and the channel selection circuit and is used for carrying out analog-to-digital conversion on the differential pressure amplification signal to obtain a differential pressure digital signal, and the channel number currently selected by the channel selection circuit and the differential pressure digital signal are combined and encoded to obtain the differential pressure digital signal with the channel number;
correspondingly, the controller is specifically configured to determine the thermosensitive digital signal and the calibration digital signal corresponding to the current polling cycle according to the differential pressure digital signal with the channel number, and correct the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance value R of the thermistor in the current polling periodPT(ii) a Among them, Code0The Code is a calibration digital signal corresponding to the current polling period, and the Code is a thermal sensitive digital signal corresponding to the thermistor in the current polling period.
3. The temperature control calibration device according to claim 2, wherein the signal amplifier is embodied as a PGA connected to the main control module;
correspondingly, the main control module is further configured to determine, in advance, signal gain requirements corresponding to each group of input channels according to differential pressure signal ranges required to be transmitted by different groups of input channels and the input signal range of the ADC circuit, to obtain a channel number gain correspondence between channel numbers and the signal gain requirements, and control the signal amplifier to be in a gain state corresponding to a channel number currently selected to be turned on by the channel selection circuit according to the channel number gain correspondence.
4. The temperature controlled calibration device of claim 2, wherein the input channels of the a/D converter include at least 3 sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor;
and the thermistor includes:
a first thermistor arranged at a temperature detection point corresponding to a reagent of the blood cell analyzer;
the second thermistor is arranged at a temperature detection point corresponding to a counting cell of the blood cell analyzer;
and the third thermistor is arranged at a temperature detection point corresponding to the reaction pool of the blood cell analyzer.
5. The temperature control calibration device of claim 1, wherein the controller is specifically configured to respond to a preset resistance temperature mapping equation RPT＝R0℃(1+AT+BT2-100CT3+CT4) Calculating the resistance R of the thermistorPTA corresponding temperature value T; wherein R is0℃The resistance value of the thermistor at 0 ℃ is a preset coefficient value A, B, C.
6. A temperature control apparatus comprising a temperature control calibration device as claimed in any one of claims 1 to 5; further comprising:
a thermistor arranged at the temperature detection point;
the temperature adjusting device is connected with the controller and is used for adjusting the temperature of the temperature detecting point corresponding to the thermistor;
correspondingly, the controller is further configured to control the operating state of the temperature adjusting device according to the temperature value corresponding to the resistance value of the thermistor, so that the temperature of the temperature detection point is kept within a preset temperature control range.
7. The temperature control device according to claim 6, wherein the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; wherein N is an integer greater than 1;
correspondingly, the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors;
the controller is specifically used for presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively; and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
8. The temperature control apparatus according to claim 7, wherein the thermistors comprise three thermistors respectively provided at temperature detecting points corresponding to a reagent, a counting cell, and a reaction cell of the blood cell analyzer.
9. A temperature control calibration method applied to the temperature control calibration device according to any one of claims 1 to 5, comprising:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermistor digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0Code for the resistance of the calibration resistor0For the calibration digital signal, Code is the thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation.
10. A temperature control method applied to the temperature control apparatus according to any one of claims 6 to 8, comprising:
acquiring differential pressure signals at two ends of the thermistor and the calibration resistor, and amplifying and performing analog-to-digital conversion on each differential pressure signal to correspondingly obtain a thermistor digital signal and a calibration digital signal;
correcting the relation R according to a preset resistance valuePT＝K0*Code,K0＝R0/Code0Calculating the resistance R of the thermistorPT(ii) a Wherein R is0Code for the resistance of the calibration resistor0For the calibration digital signal, Code is the thermosensitive digital signal;
and obtaining a temperature value corresponding to the resistance value of the thermistor according to a preset resistance value temperature corresponding relation, and controlling the running state of the temperature regulating device according to the temperature value so as to keep the temperature of the temperature detection point corresponding to the thermistor within a preset temperature control range.
11. The temperature control method according to claim 10, wherein the input channels of the a/D converter include N sets of measurement channels for measuring a differential pressure signal across the thermistor and 1 set of calibration channels for measuring a differential pressure signal across the calibration resistor; the temperature adjusting device comprises N temperature adjusting devices which are respectively used for adjusting the temperature of the temperature detecting points corresponding to the N thermistors; wherein N is an integer greater than 1;
correspondingly, the process of controlling the operating state of the temperature adjusting device according to the temperature value to keep the temperature of the temperature detecting point corresponding to the thermistor within the preset temperature control range includes:
presetting temperature control ranges of temperature detection points corresponding to the N thermistors respectively;
and controlling the running state of the temperature adjusting device corresponding to the thermistor according to the temperature value corresponding to the resistance value of any thermistor so as to keep the temperature of the temperature detecting point corresponding to the thermistor within the corresponding temperature control range.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090296769A1 (en) * | 2008-05-30 | 2009-12-03 | Hugo Fiennes | Calibration of temperature sensing circuitry in an electronic device |
| US20120130560A1 (en) * | 2010-11-19 | 2012-05-24 | Lsis Co., Ltd. | Temperature control module and temperature control apparatus having the same |
| CN102722197A (en) * | 2012-06-19 | 2012-10-10 | 深圳市理邦精密仪器股份有限公司 | Self-calibration temperature control device and method |
| CN103961066A (en) * | 2013-01-24 | 2014-08-06 | 重庆融海超声医学工程研究中心有限公司 | Temperature measurement method and temperature measurement device |
| CN204072062U (en) * | 2014-08-11 | 2015-01-07 | 深圳市理邦精密仪器股份有限公司 | A kind of temperature sensing device and armarium |
| CN204883432U (en) * | 2015-07-27 | 2015-12-16 | 深圳开立生物医疗科技股份有限公司 | Reaction chamber temperature controlling means , temperature control system and hematology analyzer |
| CN106706153A (en) * | 2017-03-17 | 2017-05-24 | 北京航天试验技术研究所 | Method for processing temperature characteristic data of low-temperature thermistor |
| WO2017158373A1 (en) * | 2016-03-18 | 2017-09-21 | Johnson Matthey Public Limited Company | Temperature measurement |
| CN107941363A (en) * | 2017-12-28 | 2018-04-20 | 重庆工商大学 | Temperature pick-up device and method based on program-controlled double constant-current supplies |
| CN108458805A (en) * | 2018-02-11 | 2018-08-28 | 北京空间飞行器总体设计部 | A method of improving resistor-type temperature sensor measurement precision |
| CN208443498U (en) * | 2018-07-30 | 2019-01-29 | 刘国先 | The temperature correction instrument that a kind of pair of electronic thermometer is calibrated |
| CN210019296U (en) * | 2018-12-29 | 2020-02-07 | 深圳迈瑞生物医疗电子股份有限公司 | Body temperature measuring circuit and mobile monitoring system with body temperature measuring circuit |
-
2020
- 2020-05-20 CN CN202010429938.0A patent/CN111552275A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090296769A1 (en) * | 2008-05-30 | 2009-12-03 | Hugo Fiennes | Calibration of temperature sensing circuitry in an electronic device |
| US20120130560A1 (en) * | 2010-11-19 | 2012-05-24 | Lsis Co., Ltd. | Temperature control module and temperature control apparatus having the same |
| CN102722197A (en) * | 2012-06-19 | 2012-10-10 | 深圳市理邦精密仪器股份有限公司 | Self-calibration temperature control device and method |
| CN103961066A (en) * | 2013-01-24 | 2014-08-06 | 重庆融海超声医学工程研究中心有限公司 | Temperature measurement method and temperature measurement device |
| CN204072062U (en) * | 2014-08-11 | 2015-01-07 | 深圳市理邦精密仪器股份有限公司 | A kind of temperature sensing device and armarium |
| CN204883432U (en) * | 2015-07-27 | 2015-12-16 | 深圳开立生物医疗科技股份有限公司 | Reaction chamber temperature controlling means , temperature control system and hematology analyzer |
| WO2017158373A1 (en) * | 2016-03-18 | 2017-09-21 | Johnson Matthey Public Limited Company | Temperature measurement |
| CN106706153A (en) * | 2017-03-17 | 2017-05-24 | 北京航天试验技术研究所 | Method for processing temperature characteristic data of low-temperature thermistor |
| CN107941363A (en) * | 2017-12-28 | 2018-04-20 | 重庆工商大学 | Temperature pick-up device and method based on program-controlled double constant-current supplies |
| CN108458805A (en) * | 2018-02-11 | 2018-08-28 | 北京空间飞行器总体设计部 | A method of improving resistor-type temperature sensor measurement precision |
| CN208443498U (en) * | 2018-07-30 | 2019-01-29 | 刘国先 | The temperature correction instrument that a kind of pair of electronic thermometer is calibrated |
| CN210019296U (en) * | 2018-12-29 | 2020-02-07 | 深圳迈瑞生物医疗电子股份有限公司 | Body temperature measuring circuit and mobile monitoring system with body temperature measuring circuit |
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