JP2569604B2 - Numeric setting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a numerical value setting device used for setting a temperature program in a temperature controller of a differential thermal analysis system.

(Prior Art) This type of temperature controller for thermal analysis needs to set a temperature gradient and a temperature holding time together with the temperature. Conventionally, a digital switch and a numeric keypad have been used. In addition, there is a disadvantage that the operation panel becomes larger than the main body of the apparatus.

(Problems to be Solved by the Invention) As a countermeasure, as shown in FIG. 2, while the button is kept pressed, the display value on the display unit is increased or decreased by a push button that generates a pulse with a constant cycle, and the desired value is obtained. If the setting is made with the setting key switch, the number of keys can be reduced to three, so that the operation panel can be downsized.
The temperature controller for thermal analysis has a disadvantage that it takes a long time to set because the set temperature range is wide and the number of digits of the set value is large. SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a numerical value setting device capable of reducing the number of necessary keys and shortening the required setting time.

(Means for Solving the Problems) In order to achieve the above object, a numerical value setting apparatus according to the present invention programs a change curve of a sample temperature by setting values of a plurality of items, and controls the temperature of the sample according to the change carp. And a numerical value setting device such as for a temperature controller for thermal analysis, comprising a control unit 1, a keyboard 2 for inputting a set value, and a display unit 3 for displaying an item to be input and an input numerical value. Two key switches 4 and 5 for generating a pulse with a constant cycle while the keyboard 2 is kept pressed and increasing and decreasing the display value by the pulse, and the control unit 1 uses the display value as a set value. In addition to providing a setting key switch 6 for taking in and, when the display number is an n-ary number, the pulse number is less than n, for example, n / 2 or more and is the smallest integer. Sequentially 1
The increase / decrease number of the display value per pulse is increased by one digit, that is, n times.

(Operation) With this configuration, all numerical values can be set with only three key switches of “increase”, “decrease”, and “set”. The amount of change in the numerical value per pulse can be gradually increased by the time the switch is kept pressed, so that the target value can be reached in a short time.

(Embodiment) FIG. 1 is a block diagram showing an apparatus of an embodiment in which the present invention is applied to a temperature controller of a thermal analyzer.
The control unit 1 has the same structure as the temperature control unit of the conventional temperature controller, and is configured by a CPU, a ROM memory, a RAM memory, and the like. A change curve of the sample temperature is programmed by setting and inputting a plurality of items. The temperature of the sample is controlled. As shown in FIG. 2, the keyboard 2 for inputting a set value is composed of three key switches, ie, an increase key switch 4, a decrease key switch 5, and a setting key switch 6. Equipped on the operation panel on the front. As shown in FIG. 3, the display section 3 displays the items to be input and the input numerical values, and only the numerical part is constituted by a numerical display element such as an LED or a liquid crystal.

The above-described increase / decrease key switches 4 and 5 generate pulses of a constant period while being pressed,
Each pulse increases or decreases the display value of the display unit 3 by 0.1 by this pulse. When the number of pulses continues for a predetermined number or more, the display value is switched so that the increase or decrease of the display value per pulse is increased by one digit. Key switch 6 for setting
When the display value reaches a desired value, the value is taken into the control unit 1 as a set value.

FIG. 4 shows an example of the operation of the apparatus of the present invention by a flowchart of a numerical value setting program. In this example, the display number is increased by one digit at every 5 pulses in decimal notation, that is, at every minimum integer equal to or more than 1/2 of the decimal number. Therefore, if you keep pressing the increase key, the display number will be 0,1,2,3,4,5,
It goes up like 15,25… 55,155,255… 555…. Considering the case where each setting item is to be set as shown in FIG. 3, the item is initially set to “heating speed”, and the program is waiting in a loop of acac.
When the operator presses the increase key switch 4, the display value changes from 0 to 0.1 on the path of acdefg. If the increase key switch 4 is kept pressed, the display value will be
0.2, 0.3, ..., and when it reaches 0.5, the amount of change in the display value per pulse increases by one digit to 1.0, and then acdef
The displayed value changes to 1.5 through the route of j. If you keep pressing it further, it will increase to 2.5,3.5,… on the same path,
When it reaches 10.5, it moves on to the route of accdei. Since the change in the display value is 10 per pulse, 20.5 follows 10.5. Here, the operator releases his hand from the key switch 4 for increase,
What is necessary is just to press the decrease key switch 5 five times shortly. As a result, the value decreases to 20.4, 20.3,... On the acdefg route, and reaches the target value of 20.0. If the setting key switch 6 is pressed here, the displayed value 2
0.0 is taken into the control unit 1 as a set value, and abc
To change the setting item to "Hold temperature".
After that, it waits for an input from the next increase key switch 4 in a loop of acac. Hereinafter, the setting of the numerical value of each item is performed in the same manner.

(Effect of the Invention) As described above, the present invention relates to a temperature controller for thermal analysis including a keyboard for inputting a set value and a display unit for displaying an item to be input and an input numerical value. While the pulse is continued, a means is provided for generating a pulse of a fixed period and increasing or decreasing the display value by the pulse, and when the number of pulses is equal to or more than a predetermined number, sequentially switching the increase or decrease of the display value per pulse. From only 3
In addition to being able to set all numerical values by using key switches, it is possible to reach the target value in a short time even if the numerical value setting range is wide, thereby realizing downsizing of the operation panel and cost reduction. There are advantages. Note that, as in the embodiment, if the decimal number is increased by one digit in half or more of the base number and the smallest integer, if the number of pulses is 9 as an example, the display number is up to 5 when the number of pulses is up to 5. Since the number of digits increases, the set time can be reduced by almost half compared to increasing the display number by one digit every n pulses in n-ary notation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention, and FIG.
FIG. 3 is a front view of a keyboard used in the above embodiment, FIG. 3 is a front view of a display unit used in the embodiment, and FIG. 4 is a flowchart of a numerical value setting program used in the embodiment. 1 ... Control unit, 2 ... Keyboard, 3 ... Display unit, 4 ...
... key switch for increase, 5 ... key switch for decrease, 6 ...
... Key switch for setting.

Claims (1)

(57) [Claims] 1. A numerical value setting device having a keyboard for inputting a set value and a display unit for displaying an item to be input and an input numerical value, wherein the keyboard has a pulse having a constant period while being depressed. And two key switches for increasing and decreasing the display value by the pulse, and a setting key switch for taking in the display value as a set value to the control unit, and according to the radix of the display number, A numerical value setting device comprising means for sequentially increasing the number of increments or decrements of a display value per pulse by one digit each time pulses equal to or less than the base number continue.