JPS59146378A - Arithmetic device - Google Patents

Abstract

PURPOSE:To find dew point temperature precisely with simple constitution without using any complex heating and cooling device, etc., by calculating the dew point from temperature and humidity by specific arithmetic through a function converting means, and a shifting means and multiplying means. CONSTITUTION:The temperature T and humidity H of an object 1 of measurement are detected by detectors 11 and 12 and inputted to an arithmetic device 2, and the input signal of the temperature T and humidity H are digitized by an A/D converter 21. A computer CPU22 calculates the dew point temperature E=f(H)(T-A)+B by using function expressions f(H) and g(H), constants A-D, etc., stored previously in a memory. The arithmetic result is displayed on a display device 24 and converted into an analog value by a D/A converter 23 to control the object 1 of measurement. During the arithmetic, a function converting means 31 converts the humidity H to the specific function f(H), a zero-point shifting means 32 performs a zero-point shift of the temperature T, and a multiplying means 33 performs multiplication by the function. The multiplication output is shifted by the zero-point shifting means 34 to output the dew-point temperature E.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Separation of the Invention The present invention relates to an arithmetic device that calculates heat points from temperature and humidity.

(2) Conventional technology Temperature, humidity, and hot spot temperature were determined by the following method, JID.

Find the non-vapor pressure of the target air.

■Next, find the temperature at which this water vapor pressure reaches the saturated water vapor pressure in a table, etc., and find this temperature as the hot point.

Searching for the hot spot through human intervention in this way is a glaring process, and is not the same as the process. In addition, if this is done in a controlled manner, it becomes very complicated and the construction of two circuits becomes troublesome.The problem is that the signal corresponding to the difference between the heating point and the temperature is also used depending on the application. However, as with hot spots, it was difficult to find direct feelings.

(3) Purpose of the Invention In view of the above points, the first object of the present invention is to provide an arithmetic device which can calculate dew point etc. with sufficient accuracy using a configuration where r=rate.

(4) Principle of the Invention In Figure 1, the horizontal axis represents the temperature of the object (T), and the temperature 1j represents the dew point (
It is obtained by taking E) and plotting the points of the two-dimensional humidity () and ().

According to this, it was found that the points of equal humidity are almost straight lines P, and that this V moisture gland intersects at a point at a dew point (E) of approximately 1113° C. and a temperature (T). That is, each relative humidity (H)
Since f(H) at about 1 is constant, the functional relationship of P)r travel is established as shown in Figure 2, and the quadratic equation is established. T-A) +B...
......(1), and the dew point (E) freezes from the calculation of this equation (1). Note that A and B are constants, and in the above example, both are -113°C.

Furthermore, even if the residual temperature (H) between the temperature (T) and the dew point (F2) is used, the difference temperature can be directly determined by performing calculations such as the following equation, which is similar to the equation (]).

E'=G(H)'(T-0) + D ・
(2) Here, O and D are constants. Note that the errors in these approximate equations are small and have sufficient practical accuracy.

(5) Embodiment of the Invention FIG. 3 is an explanatory diagram showing an embodiment of the invention.

In the figure, the temperature (T) and humidity (H) of the measured rice 1 are detected by detectors 11 and 12, and the results are input to the device 2.

The arithmetic unit 2 converts the input signals of temperature (T) and humidity (H) into digital signals using the A/D converter 21, and stores the digital signals in the memory in advance in the microcontroller 22. (1) using the function expressions f(H), ri(H), constants A, B, C, D, etc.

Calculate equation (2) and calculate dew point temperature (E) or difference temperature (
E') can be found. The signal resulting from this calculation is displayed on the display unit valve and converted into a p analog signal by the DA converter 23, which is used to drive the control end of the object 1, etc.

FIG. 4 is a block diagram showing an embodiment of the present invention for determining the dew point, which may be digitally processed by a central processing unit such as a microcomputer.

Analog processing using the so-called ``baker'' may also be used.

The humidity signal T is converted by the function conversion means 31 into a predetermined one-column number J' (H), and the humidity signal T is shifted by 4 points by the zero point shift take-home 32 to become a signal (TA). The output f (H) of the sekidai shunshi means 31 and the output (T-A,) of the four-point shift means 32 are 1 (H). When the number 1g becomes TA), the υ zero point is shifted by the point shift means 34 and E=f(H)・(T
-A) +B hot point information 'f82 grapes can be obtained.

In addition, the temperature 1 reading number (T) and the hot spot signal (
E) and the difference signal (E') can be obtained.

As a reference, when analog processing is performed, there is a king of 1J.
One way...computation platform Pengyi? Used by Noriyoshi, K.
...Co1 [calculator, attenuator/operational amplifier, the configuration of arithmetic circuit 1 is various): It can be formed.

(6) Summary of Issue +474 As stated above, this invention
) is a calculation device that performs a predetermined calculation such as the above-mentioned formula (IL (2)) to calculate the dew point and the like.

(7) Effects of the Invention Humidity measurement using a silent capacitor using a polymer 1. For metals, the dew point, etc. can be calculated very simply from a humidity signal of g1% using the resistance change of a compound.

There is no need for complex heating and cooling devices such as dew point meters.

The device becomes significantly simpler, cheaper and more efficient.

Also, since the dew point output is continuously monitored, the process 1fjl
It is also suitable for online measurement of hakama, has a wide measurement range, and can be used for two different purposes.

[Brief explanation of the drawing]

, edge 1 is the temperature. 2. A diagram showing the relationship between , line points, and humidity. FIG. 2 is a diagram showing the relationship between humidity and its slope, and FIGS. 3 and 4 are configuration explanatory diagrams showing one embodiment of the present invention. 1... Definition target, 2... (A, its stirring% bar applicant
Senfu Seisakusho Co., Ltd.

Claims (1)

[Claims] Double 1. An arithmetic device which calculates the following equation from temperature (T) and humidity (H) and extracts a signal (E) corresponding to a hot spot or a difference between the hot spot and the temperature. B= f(H)(T-A) +B (Here, f(H) is a predetermined function determined by humidity. A and B are constants.) 2. The above calculation is performed by a microcomputer. An arithmetic device according to claim 1. 3. Function converting means for converting the humidity signal into a predetermined function, first zero point shifting means for shifting the zero point of the temperature signal, and a combination of the output of the first zero point shifting means and the output of the function converting means. 2. An arithmetic device according to claim 1, characterized in that said arithmetic operation is carried out by comprising a multiplication means for calculating the value of 0, and a second zero point shift means for shifting the zero point of the output of said multiplication means.