JPH0112200Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an equivalent reaction amount recording device, more specifically, an equivalent reaction amount recording device that records the amount of chemical reaction such as rubber vulcanization reaction or polymeric material curing reaction together with reaction temperature. Regarding.

Generally, in chemical reactions such as rubber vulcanization reactions and polymer substance curing reactions, a known method for measuring the reaction amount is to measure the temperature of the reactants to determine the equivalent reaction amount. This is a method in which a sensor (for example, a thermocouple, etc.) is inserted into the reactant during the reaction to measure the temperature, and the relative reaction amount is determined from the temperature based on the following Arrhenius reaction rate equation.

U=∫ ^t ₀ exp [E/R (1/T-1/T ₀ )] dt U: equivalent reaction amount E: activation energy R: gas constant T: temperature of reactant at time t T ₀ : reference temperature t: Time.

The output of a reaction amount calculating device based on these principles (for example, Japanese Patent Application No. 54-22025 filed by the present applicant) is usually a digital output, so the time, temperature, and reaction amount are usually output to a printer.

However, as mentioned above, when the calculation result of the reaction amount is digitally displayed on a printer along with the time t and temperature T, etc., it is difficult to understand changes over time in the reaction amount, temperature, etc. because the display is digital.
Another drawback was that storing and retrieving data for output to a printer was complicated.

The present invention was developed in view of the above-mentioned shortcomings of conventional equivalent reaction amount measuring devices, and it displays temperature and equivalent reaction amount in analog form to make it easier to understand the equivalent reaction amount and temperature changes over time. An object of the present invention is to provide an equivalent reaction amount recording device that facilitates the storage and retrieval of .

For this reason, the present invention provides a temperature measuring device that outputs an analog temperature signal proportional to the temperature at a temperature measuring point in the reaction system from a thermoelectromotive force obtained from a temperature sensor inserted into the reaction system, and The analog temperature signal obtained is converted into a digital temperature signal, the reaction amount of the reaction system is calculated from a preset activation energy value, reference temperature value, and the digital temperature signal, and the calculated value is converted into an analog reaction amount signal. It is composed of a reaction amount calculation device that converts and outputs it, and a voltage recorder that has a plurality of recording channels.The analog temperature signal inputted from the temperature measurement device is recorded in analog on some of the channels, and the analog temperature signal input from the temperature measurement device is recorded in analog on some of the channels. The method is characterized in that the analog reaction amount signal inputted from the reaction amount calculation device is recorded in analog form.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example in which the present invention is applied to the measurement and recording of the equivalent reaction amount of rubber vulcanization reaction.

In FIG. 1, 10 is a rubber tire to be vulcanized, 11, 12, .
17 is a terminal plate for these thermocouples 11, 12, . . . , 16, 18 is a temperature measuring device, 19 is a reaction amount calculation device, and 20 is a temperature reaction amount recording device.

The temperature measurement device 18 includes a linearizer (not shown) that amplifies and linearizes the thermoelectromotive force (voltage) generated in the thermocouples 11, 12, . . . , 16 as temperature sensors, and a room temperature compensation circuit ( ) and the output of the linearizer, for example, a thermocouple 11,
It consists of a multiplexer (not shown) and the like that repeatedly selects the outputs of the linearizers 12, . . . , 16, 11, 12, .

As shown in FIG.
For example, when the temperature at one temperature measurement point changes from 0° C. to 300° C., the output of the linearizer changes from 0 volts to 3 volts in response to the temperature change.

On the other hand, as shown in FIG. 2, the reaction amount calculation device 19 includes an A/D converter 21 that converts the analog temperature signal input from the multiplexer of the temperature measurement device 18 into a digital temperature signal, and a microcomputer that calculates the equivalent reaction amount. 22. A D/A converter 23 that converts the digital reaction amount signal outputted from the microcomputer 22 into an analog reaction amount signal, and a D/A converter 23 that converts the analog reaction amount signal outputted from the D/A converter 23 to the temperature measuring device 18. signal line 24 in synchronization with the multiplexer.
b, 25b, . . . , 29b, etc.

The microcomputer 22 includes a central processing unit 31, a read-only memory (ROM) 32 for storing programs, a random access memory (RAM) 33 as a work area, an input/output terminal 34,
It has a well-known configuration consisting of 35, 36, etc.

The central processing unit 31 includes a start button 3.
A start signal is input from 7, and a command signal for reading the digital temperature signal of the A/D converter 21 is input at fixed time intervals from the timer circuit 38, while a reference temperature T ₀ and activation energy are input from the digital switches 39 and 40, respectively. A signal corresponding to E ₀ is input.

The central processing unit 31 operates according to the program written in the ROM 32, and when a start signal is input from the start button 37, the timer circuit 38 sends the A/D converter 21 at regular intervals as described above. Read the digital temperature signal and input the reference temperature T ₀ and activation energy from the digital switches 39 and 40, respectively.
E ₀ outputs a digital equivalent reaction amount signal from the Arrhenius equation to the D/A converter 23 .

Note that the central processing unit 31 switches the distributor 3 in synchronization with the switching of the multiplexer of the temperature measuring device 18.
Switch 0.

The digital equivalent reaction amount signal outputted from the central processing unit 31 is input to the D/A converter 23 and converted into an analog equivalent reaction amount signal.
Input to the distributor 30 and thermocouples 11, 12, ..., 1
6, the signal lines 24b, 25b,
..., 29b, the analog equivalent reaction amount signal is inputted to the temperature reaction amount recording device 20 shown in FIG.

The temperature reaction recording device 20 is, for example, a 12-channel multi-point (multi-color pen) voltage recorder, and the first to sixth channels are connected to the output signal line 24 of the linearizer of the temperature measuring device 18.
a, 25a, 26a, 27a, 28a, and 29a, while signal lines 24b, 25b, . . . , 29b are connected to the seventh channel to the twelfth channel, respectively.

When the equivalent reaction amount recording device has the above configuration and the start button 37 of the reaction amount calculation device 19 is turned on, a pulse (digital temperature signal reading In response to the command signal), the digital temperature signal digitized by the A/D converter 21 is read by the central processing unit 31 of the microcomputer 22, and Arrhenius calculation is performed to calculate the cumulative equivalent reaction amount.

The calculated cumulative equivalent reaction amount is sent as a digital amount from the microcomputer 22 to the D/A.
It is output to the converter 23 and converted into an analog quantity, and then sent to the temperature reaction quantity recording device 2 via the distributor 30.
The signal is input from the 7th channel of 0 to the 12th channel.

For this reason, the seventh part of the temperature reaction amount recording device 20 is
The curve from channel to channel 12 is shown in Figure 3.
An equivalent reaction amount curve as shown by l ₇ , l ₈ , etc. will be drawn.

Further, a temperature measuring device 1 is provided from the first channel to the sixth channel of the temperature reaction amount recording device 20.
Since temperature-proportional analog voltage signals are input from each of the 8 linearizers, the upper 1st channel to the 6th channel draw temperature curves as shown by curves l ₁ , l ₂ , etc. in Figure 3. become.

As can be seen from FIG. 3 above, in the temperature reaction amount recording device 20, the change over time in the equivalent reaction amount is recorded at the same time as the temperature, so the progress of the reaction can be easily understood. It is also possible to estimate the progress time.

It should be noted that the present invention can be widely applied to general chemical reactions in addition to the vulcanization reaction of rubber tires explained in the above embodiments.

Further, the channels of the temperature reaction amount recording device 20 are divided into odd channels and even channels, and an analog voltage signal proportional to temperature is input from the temperature measuring device 18 to the odd channels, and a reaction amount calculation device 19 inputs a temperature proportional voltage signal to the even channels. A quantity-proportional analog voltage signal may also be input.

Further, contrary to the above, the analog voltage signal proportional to the reaction amount may be input to the odd channels, and the analog voltage signal proportional to the temperature may be input to the even channels.

As is clear from the detailed description above, the present invention uses a temperature reaction amount recording device consisting of a voltage recorder having multiple recording channels to simultaneously record the temperature and equivalent reaction amount in analog form.
Changes in the equivalent reaction amount over time are recorded simultaneously with changes in temperature over time, making it possible to visually understand the progress of a chemical reaction, and also to estimate the reaction progress time.

Furthermore, in the present invention, since the equivalent reaction amount and temperature change over time can be recorded on a single chart, storage and retrieval of data becomes extremely easy.

Furthermore, if a multi-channel temperature reaction amount recording device is used, multiple temperatures and equivalent reaction amounts can be viewed at the same time, making it easy to find correlations between reaction amount measurement sites.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the equivalent reaction amount recording device according to the present invention, Fig. 2 is a block diagram showing details of the equivalent reaction amount recording device of Fig. 1, and Fig. 3 is a temperature reaction amount recording device. FIG. 2 is an explanatory diagram of an equivalent reaction amount curve and a temperature curve recorded by. 10...Rubber tire, 11, 12, 13, 1
4, 15, 16... thermocouple, 18... temperature measuring device, 19... reaction amount calculation device, 20... temperature reaction amount recording device.

Claims (1)

[Scope of utility model registration request] A temperature measuring device that outputs an analog temperature signal proportional to the temperature at a temperature measurement point in the reaction system from a thermoelectromotive force obtained from a temperature sensor inserted in the reaction system; A reaction amount that is converted into a digital temperature signal, calculates the reaction amount of the reaction system from a preset activation energy value, reference temperature value, and the digital temperature signal, and converts the calculated value into an analog reaction amount signal and outputs it. It consists of a calculation device and a voltage recorder having a plurality of recording channels, in which the analog temperature signal input from the temperature measurement device is recorded in analog form on some channels, and the analog temperature signal input from the reaction amount calculation device is recorded on other channels. An equivalent reaction amount recording device comprising a temperature reaction amount recording device for analog recording an input analog reaction amount signal.