CN106706703A - Measurement and control system of rotating-bomb calorimeter - Google Patents

Abstract

The invention discloses a measurement and control system of a rotating-bomb calorimeter, comprising a bomb body temperature measuring and controlling module, an ignition and ignition energy measuring module, a chamber temperature controlling module, a temperature rise calculating module, a calibrating module, a calorimetric module, a rotating module and a process management module. According to the measurement and control system of the rotating-bomb calorimeter disclosed by the invention, integral rotation of a calorimetric environment and a calorimetric system and control on the same, intelligentized temperature measurement and control of the calorimetric environment and the calorimetric system and automatic calculation of the measurement process and result are realized.

Description

Rotary Elastic Calorimeter Measurement and Control System

technical field

The invention relates to a temperature measurement and control system of a rotary elastic calorimeter.

Background technique

Microcalorimetry is an important branch of thermodynamics. Calorimeters can be used to accurately measure thermal effects in physical, chemical and biological processes and calculate kinetic and thermodynamic parameters to study the changing laws of thermal effects in the process, speculate on the mechanism of the reaction process, changes in molecular structure and reaction kinetics, and predict The direction of reaction and the conditions of chemical equilibrium provide reliable thermal parameters for the design and construction of chemical engineering, which are of great significance in theory and practice.

The oxygen bomb calorimeter is the most basic instrument device for directly obtaining the thermodynamic parameters of chemical substances by burning samples. According to whether the bomb body rotates, the oxygen bomb calorimeter is divided into a static bomb calorimeter and a rotating bomb calorimeter. The characteristic of the static bomb calorimeter is that the combustion oxygen bomb is always in a static state during the combustion reaction. The static bomb calorimeter has high measurement accuracy for simple organic compounds containing carbon, hydrogen, oxygen and nitrogen without side reactions, but for the measurement of complex compound samples containing sulfur, halogen, phosphorus, boron and metal elements, due to combustion The chemical properties and physical state of the product cannot be strictly determined, resulting in an unstable final state and unreliable measurement results. For example, use a static bomb calorimeter to measure the combustion heat of organic sulfur compounds. Since sulfur elements have different valence states, the combustion result often produces SO ₂ as a side reaction product, and the H ₂ SO ₄ solution obtained by dissolving SO ₃ in the bullet fluid is Different parts of the oxygen bomb have different concentration distributions, so the final product obtained after combustion is not a stable and uniform system, which cannot be analyzed accurately, so the calorific value obtained is inaccurate.

Due to the continuous rotation of the bomb body, the rotating bomb calorimeter scours the bomb wall and its accessories due to the continuous rotation of the bomb body, so that the inside of the bomb can quickly reach a homogeneous phase and chemical equilibrium, effectively overcoming the unstable state of the final product in the static bomb calorimeter , The side reaction cannot be completely carried out and the combustion is not complete, so the measured substances can be extended to complex compounds containing sulfur, halogen, phosphorus, boron, silicon and metal elements. At the same time, the rotation process can promote some side reactions in the combustion process, so that the combustion process in the bomb can reach a thermochemical stable state in a very short time, thereby improving the accuracy of combustion energy measurement. Taking sulfur-containing organic compounds as an example, the generated by-product SO ₂ is quickly oxidized to SO ₃ by the lining metal platinum catalyst during the rotation process, and is dissolved in the bullet fluid. It can be seen that due to the effective effect of rotation, the final product is easy to form a uniform and stable system, so the chemical and thermodynamic characteristics of the final product are more clearly defined, and proper method analysis for it increases the accuracy of measurement. Compared with the static bomb calorimeter, although the rotating bomb calorimeter has the above advantages, a certain amount of heat leakage will inevitably occur during the rotation of the bomb body. How to reduce the heat leakage generated by the rotation is an urgent need for the development of the rotating bomb calorimeter. solved problem.

Contents of the invention

The purpose of the present invention is to provide a rotating bomb calorimeter measurement and control system.

The realization process of the present invention is as follows:

Rotary elastometer measurement and control system, which includes:

—The projectile temperature measurement and control module measures the temperature of the rotating projectile in real time with a resolution of 1/100,000, and regulates the temperature of the projectile to the set value in the temperature range of 15-35°C;

—Ignition and ignition energy measurement module, providing electrical energy for sample ignition and measuring ignition electrical energy;

—Cavity temperature control module, which controls the temperature of the vacuum chamber and provides a constant temperature working environment for the projectile;

—The temperature rise calculation module corrects the temperature change of the measured projectile body to determine the temperature rise;

—The calibration module determines the energy equivalent of the calorimeter according to the energy and temperature rise provided by electrical calibration and material calibration;

—Calorimetric module, which determines the calorific value of the sample according to the temperature rise, sample mass and energy equivalent;

—Rotating module to control the vacuum chamber to reciprocate from 0 to 180 degrees along the horizontal axis, and to reciprocate from 0 to 360 degrees around the vertical axis at the same time;

—The process management module coordinates the above-mentioned modules to complete the test work under the control of program instructions.

The above calibration module is divided into electrical calibration module and chemical calibration module,

—Electrical calibration module, according to the energy feeding time set by the computer, calculates the electric energy and temperature rise of the thermopile fed to the projectile to determine the energy equivalent of the calorimeter;

—The chemical calibration module determines the energy equivalent of the calorimeter according to the combustion calorific value of the calorific value reference material benzoic acid, the amount of the sample and the temperature rise.

The platinum thermistor used for temperature measurement above has a graduation resolution of 0.00001°C in the linear range.

The semiconductor thermopile used for temperature control mentioned above heats when the semiconductor thermopile detects that the temperature of the projectile is lower than the set value, and cools and cools down when the temperature is higher than the set temperature. When the calorie command is issued, the temperature control program is automatically terminated.

The advantages and positive effects of the invention: realize the integrated rotation and rotation control of the calorimetric environment and the calorimetric system; realize the intelligent temperature measurement and control of the calorimetric environment and the calorimetric system; realize the automatic calculation of the measurement process and results.

Instructions attached

Figure 1 is a block diagram of a calorimeter;

Figure 2 is a flow chart of the measurement and control system;

Fig. 3 is the circuit diagram of measuring body temperature;

Figure 4 is a circuit diagram of the ignition power supply;

Fig. 5 is a cavity temperature control module diagram;

Fig. 6 is a flow chart of the cavity temperature control module;

Fig. 7 is a block diagram of Reynolds correction calculation;

Fig. 8 is a maximum value correction calculation block diagram;

Fig. 9 is a flow chart of the calibration module;

Fig. 10 is electric energy calibration control and heating circuit diagram;

Figure 11 is a flow chart of the calorimetric module;

Fig. 12 is a rotation control circuit diagram.

detailed description

As shown in Figure 1, the heat measurement process of the rotating bomb calorie is as follows:

The first step is to execute the constant temperature command: the computer outputs the constant temperature command of the vacuum chamber and transmits it to the vacuum chamber constant temperature unit in the temperature controller. power. Simultaneously start the power supply of the rotary vane pump and the molecular pump, export the air in the cavity through the exhaust pipe, and the composite vacuum gauge will display the pressure in the cavity, and control the temperature of the cavity to be constant at 25.000±0.001°C;

The second step is to execute the calibration or calorimetry command

Electric calibration command: Execute the first step constant temperature command, the computer outputs the electric calibration command, the body temperature measurement and temperature control unit calculates the heating power according to the feeding time set by the computer, heats the projectile, and through the interlayer installed in the projectile body The bullet temperature probe collects the temperature value of the bullet body in real time, and the electrical calibration command ends automatically after calibration, and the computer calculates the energy equivalent of the calorimeter according to the fed energy and the collected bullet temperature curve.

Material calibration instructions: fix the standard calorific value sample in the crucible in the projectile, put it into the projectile, and fill it with 3 MPa high-purity oxygen. Put the projectile into the constant temperature cavity again, and execute the first step constant temperature command. Input the sample parameters in the computer, and output the substance calibration instruction. The projectile temperature measurement unit collects the temperature value of the projectile in real time, and at the same time executes the ignition command, the ignition power is started, and then the current is released through the two ends of the platinum wire of the sample to ignite the test sample. After 10s, the rotation command is executed, and the rotation control starts. The cavity and projectile rotate from 0 to 180° in the horizontal direction, and reciprocate in the vertical direction from 0 to 360°, and the rotation instruction ends after 100s. After the material calibration instruction is completed, the energy equivalent of the calorimeter is calculated by computer according to the heat of the standard sample and the collected projectile temperature curve.

Calorimetry instruction: fix and inflate the test sample with oxygen in the same way as the substance calibration instruction, put the projectile into the constant temperature chamber, and execute the first step constant temperature instruction. The sample parameters are input into the computer, and the calorimetric instructions are output. Afterwards, it is the same as executing the material calibration command. After the calorimetric command ends, the computer calculates the combustion calorific value of the measured sample according to the collected projectile temperature curve.

The measurement and control system of the present invention includes a projectile body temperature measurement module, a projectile body heating module, a projectile body heating measurement module, an ignition and ignition energy measurement module, a cavity temperature control module, a temperature rise calculation module, a calibration module, a calorimetry module, a rotation module and The process management module coordinates and controls the sequence of constant temperature, combustion, vacuum, and chamber rotation, so as to automatically complete the test work under the control of program instructions.

As shown in Figure 2, the measurement and control system is a bridge connecting the calorimeter and the microcomputer. It receives and executes various instructions issued by the computer, and monitors the temperature changes of the calorimeter cavity and projectile body in real time and transmits them back to the computer after conversion. The function of the projectile temperature measurement and control module in the measurement and control system has two aspects. One is to collect the temperature of the projectile in real time and transmit it back to the computer. The other is to control and heat the projectile when receiving the electrical calibration command. When the ignition control and ignition energy measurement module receives the ignition instruction from the computer, it starts the power supply of the ignition circuit and measures the ignition energy provided to the calorimeter. After the cavity temperature control module receives the constant temperature command issued by the computer function management and process management, it controls the cavity temperature to be constant to the required value through PID calculation. After the rotation control module receives the rotation command issued by the computer function management and process management, it controls the vacuum chamber to rotate reciprocally from 0 to 180 degrees along the horizontal axis, and to rotate 0 to 360 degrees around the vertical axis at the same time. The measurement and control system also has a room temperature real-time monitoring module, which collects indoor temperature values in real time.

1. Projectile body temperature measurement and control module

One of the core problems of calorimetry is the accurate measurement of temperature. The temperature measurement module uses a specially made platinum resistance temperature sensor in the wall of the projectile body to record 6 times of data in 1 second, and after amplification and conversion, it will output to the computer CPU to monitor the temperature change in real time. The temperature measurement module is mainly composed of platinum resistance temperature sensor, bridge measurement circuit, signal amplifier, A/D converter and microcomputer, as shown in Figure 3. Thermistor platinum resistors and two 20kΩ (R ₁ and R ₂ ), one 4.4 kΩ (R ₃ ) precision resistors form a bridge, and the bias potential signal of the bridge is amplified by 68 times and then sent to the high-resolution 23-bit A The /D sampling circuit converts it into a digital signal and sends it to the computer, and the software automatically records the change of the bias potential signal, and the bias potential has a linear relationship with the temperature within a certain temperature range. Due to the high precision of A/D sampling, the resolution of temperature measurement is 0.00001℃.

Platinum resistance Pt4000 has the characteristics of good stability, repeatable operation, fast response and wide working temperature range. In use, only necessary linearization processing and temperature calibration can meet the temperature measurement range of the calorimeter 20-30 ℃. skills requirement.

Calculate the specific temperature of the projectile according to the projectile temperature measurement circuit diagram in Figure 2 as follows:

(2) In the formula, A and B are the graduation constants of the platinum resistance temperature sensor, respectively A=3.90802×10 ^-3 , B=-5.80195×10 ^-7 ; T is the Fahrenheit temperature, the unit is K, T=t+273.15 , t is the temperature in degrees Celsius.

The bias potential U _T of the bridge output can be obtained by the A/D converter, and the value of the current E can be obtained through measurement, and the temperature T' can be obtained by combining (1) and (2). Because the platinum resistance has errors, the amplifier has errors that need to be corrected, so the actual temperature T of the projectile body is T=aT'+b (3)

(3) where a and b are correction coefficients, which are obtained through multiple temperature measurement experiments and temperature calibration.

2. Ignition and ignition energy measurement module

This system designs a set of capacitor discharge automatic ignition circuit, its principle is shown in Figure 4. Before ignition, the 200V 20μF capacitor is charged by the regulated power supply. When the ignition is turned on, the two poles of the capacitor are discharged due to the conduction of the ignition wire. After that, the ignition wire heats up and ignites the sample and then fuses. The capacitor discharges and reduces the voltage instantly. Calculate the electrical energy used for ignition by the following formula

In the formula: C is the capacitance of the capacitor; U ₁ and U ₂ are the voltage before and after the ignition of the capacitor, k is the coefficient introduced by the loss of ignition energy on the line, and its value is determined by experiment. Because the platinum wire with a diameter of only 0.025mm is selected when designing the ignition wire, a large resistance will be generated during ignition and a high voltage is required, so an ignition capacitor with a large voltage and a small capacitance is selected, which will shorten the ignition time and increase the ignition energy. Smaller and more stable ignition.

3. Cavity temperature control module

The temperature control module mainly controls the constant temperature in the chamber. The circuit principle is shown in Figure 5, and the flow chart is shown in Figure 6. A temperature sensor B (resistance Rt) and an electric heater (resistance R _L ) are installed in the sandwich wall of the vacuum chamber. The temperature sensor B is a thermosensitive platinum resistance, and its resistance value changes with the temperature. It is related to the two A precision resistor of 3KΩ and 200Ω constitutes a bridge circuit. The voltage signal of the bridge is amplified 10 times by the amplifier circuit and converted into a digital signal by a 23-bit analog/digital (A/D) converter, and then the computer performs PID calculation. , the output control signal is transmitted to a 35V adjustable power supply through a 16-bit (D/A) converter to drive the heater to work at a suitable power, and finally make the temperature of the controlled system reach the set value, which can control the temperature to be constant to (25±0.001)°C.

PID (Proportional Integral Derivative) temperature control is a method of controlling system deviation by using proportional P, integral I and differential D to calculate the control quantity. It has high reliability, good stability, and simple calculation method, and is widely used in process control and motion control.

In the cavity temperature control module, when the measured temperature collected by the temperature sensor deviates from the desired given value, the PID control can perform proportional P, integral I, and differential D operations according to the deviation between the measured signal and the given value, so that Output an appropriate control signal to the execution system, prompting the measured value to return to a given value, and achieve the effect of automatic control. The operation of the PID module is very simple, as long as 4 parameters are set, the temperature can be precisely controlled: 1. Temperature setting; 2. P value; 3. I value; 4. D value; the temperature control accuracy of the PID module is mainly affected by P, I, D these three parameters influence. Through many experiments and tests, the developed miniature calorimeter usually sets P at 1~10, I at 50~200, and D at 0~1.

4. Temperature rise calculation module

The correction method of the temperature curve in the temperature rise calculation module is written using the Reynolds correction method and the maximum value correction method. The specific correction calculation block diagrams are shown in Figures 7 and 8.

5. Calibration module

After the temperature control is completed, the calibration can be performed after observing that the displayed cavity temperature curve is stable at ±0.001°C. Select electrical calibration or material calibration, set technical parameters, input material information, adjust the temperature to a suitable temperature, and start calibration manually or automatically. The specific flow chart is shown in Figure 9.

Because of the advantages of convenience, stability and anytime, electric energy calibration is also used as an effective means of calibrating the calorimeter when designing a micro calorimeter. It provides a constant thermal power P to the calorimetric system in the form of accurate electrical energy, and then calculates the ratio of the electrical energy E calculated from the thermal _power P to the corresponding temperature rise value ΔT of the entire calorimetric system to obtain the calorimeter energy equivalent. This system has designed control and heating circuits dedicated to electric energy calibration, as shown in Figure 10.

When the system receives the instruction of electric energy calibration, the calibration power supply provides a current of time t _B (t _B is called energy feeding time) to a stable heating resistor _RL through the timing switch, and the A/D converter once per second Measure the voltage UB at both ends of the heating resistor, and measure the current at both ends of the resistor r connected in series with _RL to obtain _{I B ,} and then send the collected data back to the computer. The software program can measure the voltage and current data of the heating resistor. Calculate the heating electric energy at time t _B as

In the formula It is the sum of the power data of the first point and the last point discarded, because the heating power values measured at the first point and the last point are too different from the real value, so they should be discarded during calculation, and finally all the heating power is multiplied by the average value of P _B It can be obtained by recovering it with t _B /(t _B -2).

Taking the implementation of electrical calibration as an example, set the experimental environment at 25°C in the cavity temperature control module, and control the cavity temperature at (25.00±0.001)°C. The energy feeding time is set, the projectile heating module controls the constant voltage power supply to feed the projectile with electric energy to change the temperature of the projectile, and the projectile heating measurement module measures the electric energy fed by the heating module to the projectile. During the temperature change of the projectile, the projectile temperature measurement module measures the temperature of the projectile in real time and draws a temperature curve. The temperature rise calculation module corrects the measured projectile temperature change to determine the temperature rise value. Finally, the electrical calibration secondary module in the calibration module determines the energy equivalent of the calorimeter according to the fed energy and the temperature rise value, and the implementation of the electrical calibration is completed.

Taking the implementation of material calibration as an example, the chamber temperature control module performs the same operations as in the electrical calibration embodiment. After the calorific value reference material benzoic acid sheet is assembled in the combustion projectile, it is inflated, sealed, and placed in a vacuum constant temperature chamber. The projectile temperature measurement module performs the same operation as in the electric calibration embodiment until the calorimeter system stably executes the material calibration instruction. The ignition and ignition energy measurement module executes the ignition command, and after 10 seconds, the rotation module controls the rotation of the vacuum cavity and the projectile as a whole according to the set trajectory. The temperature rise calculation module corrects the measured projectile temperature change to determine the temperature rise value. The substance calibration secondary module in the calibration module determines the energy equivalent of the calorimeter based on the combustion heat and temperature rise of benzoic acid, and the implementation of the substance calibration is completed.

Taking the calorimetric experiment as an example, all operations of the calorimetric module before execution are the same as the above-mentioned substance calibration example. The calorimetric module determines the combustion calorific value of the sample substance according to the calorimeter energy equivalent, sample volume and temperature rise value, and the calorimetric experiment is completed.

6. Calorimetric module

After the incendiary projectile is equipped, the temperature is controlled through the cavity temperature control module, enter the calorimetry module, input the mass, name and energy equivalent of the instrument, and enter the start time after the system is stable, and the calorimetric experiment can be started automatically after confirmation , carry out sample ignition and ignition energy measurement module, rotation module, projectile temperature measurement module, temperature rise calculation module, and the experimental results are automatically calculated and output. The flow chart of the calorimetry module is shown in Figure 11.

7. Rotating module

The invention rotates the vacuum chamber and the projectile together, so that the combustion system and the constant temperature environment move at the same time, and the heat is only exchanged between them without being transferred to the outside, which prevents the leakage of heat generated by the rotation. The rotation mode is designed to rotate 360° in the Y-axis direction and 180° in the X-axis direction at the same time. The trace experiment has confirmed that this kind of rotation track can allow the bullet liquid to fully flush the inner wall and accessories of the bullet body without any dead angle. These designs on the rotation mode of the miniature projectile not only reduce heat leakage and later heat exchange correction, but also establish a new calorimetric system design idea, study the combustion system and constant temperature environment as an isolated system, and redefine the calorimeter. system and environment.

The rotation control circuit diagram is shown in Figure 12. After receiving the rotation command from the microcomputer, the programmable controller of the stepping motor turns on the switch k ₁ to provide current to the programmable controller and the switching power supply. Turn off _k2 , start the editable controller, and switch the power supply to output 24V voltage to the stepper driver at the same time, the output signal of the editable controller drives the stepper motor to rotate the X-axis and Y-axis synchronously according to the programmed speed, angle and time program , the operation is completed automatically. k ₃ is used to control the rotation to stop at any time to deal with unexpected situations during the operation of the calorimeter.

The rotation control is mainly realized by the YJ-01 stepper motor programmable controller, which can control the driver to perform various single-axis complex operations. A, B interrupt operation is a major feature of this controller, through programming it can not only control the motor to run at a certain speed and certain displacement, but also control the motor to run in one direction from the starting point until it hits a travel switch Then stop, and then run in reverse to return to the starting point. It can also control the stepper motor to reciprocate n times between the two travel switches. Especially suitable for subdivision drives. The two units are used to control the directions of the X-axis and the Y-axis respectively, and drive two stepping motors to rotate synchronously.

The effect of rotation on the calorimetric system was investigated through the rotation background experiment. The calorimetric experiment was carried out on the projectile without assembling the sample. After the instrument was ignited and rotated, the temperature rise during the rotation process was calculated, and the energy generated during the rotation was obtained. The average value obtained from multiple experiments is less than 0.1J. It can be seen that the heat leakage generated during rotation is extremely small, and it is even smaller compared to the combustion heat of the sample.

Electric calibration experiment

Calorific value reference material calibration has different experimental conditions for the determination of compounds composed of different elements. It is divided into two cases: no bullet fluid and bullet fluid. For this reason, the electric calibration experiment is also carried out according to these two conditions. Take 1°C as the interval, divide it into 7 intervals from 21.5-28.5°C, perform 8 calibrations in parallel, set the energy feeding time to 40s, and the correction curve time to t _x =100s, _ty =200s. In the range of 24.5-25.5℃, the average value of electrical calibration energy equivalent without adding ammunition fluid is 291.7138 J·℃ ^-1 , and that of adding water as ammunition fluid is 295.4509 J·℃ ^-1 , with a difference of about 4J·℃ ^-1 .

Material calibration experiment

Calorific value benchmark benzoic acid (BA 39j), content ≥99.999%, mass heat of combustion -(26434±3) J·g ^-1 , provided by the National Institute of Standards and Technology (NIST).

Tablet compression: Weigh a certain mass of benzoic acid, put it into a mold, and press it into a hollow benzoic acid tablet with a diameter of about 5mm in a tablet machine, and accurately weigh it on a millionth balance before use. The production process is the same as that of benzoic acid.

Reference material calibration experimental steps:

(1) Start up: first turn on the power supply of the measurement and control instrument, vacuum gauge, ignition device, molecular pump, and control rotation device to preheat the calorimeter;

(2) Enter the control operation program: turn on the computer, enter the desktop control program, set the temperature control temperature to 25°C and other corresponding working parameters;

(3) Sample loading: Pass the weighed benzoic acid piece through the combustion wire, put it into a platinum crucible, fix the two ends to the ignition column on the top of the incendiary bomb body, put it back into the bomb body, and tighten the cover with a torque wrench;

(4) Inflation: Fill the oxygen bomb with 3MPa high-purity oxygen, and repeat the inflation and deflation for 2-3 times to remove the air in the bomb. After inflating, put the projectile into the outer cavity and seal it;

(5) Vacuum heat preservation: the mechanical pump combined with the molecular pump works until the reading of the vacuum gauge shows 10 ^-3 Pa, then adjust the temperature;

(6) Calibration: adjust the temperature to about 24.5°C, and perform material calibration after the temperature curve is stable. The projectile rotates about 10s after the calibration starts, and stops after about 100s of rotation, and controls the temperature measurement program to collect data for 700s until the combustion reaction ends.

Eight sets of calorific value benchmark benzoic acid combustion experiments were carried out without bomb liquid and with 1mL distilled water in the incendiary bomb, and the experimental results were 299.99 and 304.55J·℃ ^-1 respectively, and the difference between the two was about 4J·℃ ^{- 1} , consistent with the electrical calibration results.

Claims (4)

1. The measurement and control system of the rotary bomb calorimeter is characterized in that it includes: —The projectile temperature measurement and control module measures the temperature of the rotating projectile in real time with a resolution of 1/100,000, and regulates the temperature of the projectile to the set value in the temperature range of 15-35°C; —Ignition and ignition energy measurement module, providing electrical energy for sample ignition and measuring ignition electrical energy; —Cavity temperature control module, which controls the temperature of the vacuum chamber and provides a constant temperature working environment for the projectile; —The temperature rise calculation module corrects the temperature change of the measured projectile body to determine the temperature rise; —The calibration module determines the energy equivalent of the calorimeter according to the energy and temperature rise provided by electrical calibration and material calibration; —Calorimetric module, which determines the calorific value of the sample according to the temperature rise, sample mass and energy equivalent; —Rotating module to control the vacuum chamber to reciprocate from 0 to 180 degrees along the horizontal axis, and to reciprocate from 0 to 360 degrees around the vertical axis at the same time; —The process management module coordinates the above-mentioned modules to complete the test work under the control of program instructions. 2. The temperature measurement and control system of the rotating elastic calorimeter according to claim 1, characterized in that: the calibration module is divided into an electrical calibration module and a chemical calibration module, —Electrical calibration module, according to the energy feeding time set by the computer, calculates the electric energy and temperature rise of the thermopile fed to the projectile to determine the energy equivalent of the calorimeter; —The chemical calibration module determines the energy equivalent of the calorimeter according to the combustion calorific value of the calorific value reference material benzoic acid, the amount of the sample and the temperature rise. 3. The temperature measurement and control system of the rotary elastic calorimeter according to claim 1, characterized in that: a platinum thermistor is used for temperature measurement, and the graduation resolution in the linear interval is 0.00001°C. 4. The temperature measurement and control system of the rotary bomb calorimeter according to claim 1, characterized in that: a semiconductor thermopile is used for temperature control, when the semiconductor thermopile detects that the temperature of the projectile is lower than the set value, it is heated, and when it is higher than the set temperature, it is heated. Refrigeration and cooling, when the calorific command is issued, the temperature control program is automatically terminated.