JPS5911463A - Electronic calculator - Google Patents

Abstract

PURPOSE:To attain the confirmation of a measured value afterward, by measuring automatically an analog quantity such as temperature and humidity based on time in an electronic calculator and storing the measured value. CONSTITUTION:The block I shows the constitution of the electronic calculator with a clock, and the block II indicates a temperature measuring section. The temperature information sensed at a sensor 9 is an output (d) via a temperature- pulse width transducer circuit 10, inputted to an AND circuit 11 together with a reference pulse (a) to be an output (e). The output (e) is inputted to a counter 12 for being counted and A/D-converted. The counted temperature information is transferred on a display register 13 via an operating circuit 17 and displayed digitally on a display 2 via a decoder/driver 20. When the circuit 17 detects the clock of clock information with the instruction stored in an ROM18, the temperature information is stored automatically in a memory 19 together with the time information. This is called out later with the operation of the temperature key.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a clock circuit for measuring date and time, temperature,
The present invention relates to an electronic desktop calculator having a measurement circuit for measuring humidity, etc.

Currently, electronic desk calculators (hereinafter referred to as "densha") having a function of measuring date and time are on the market. There are also calculators that can display analog information such as temperature and humidity, but they only display temperature, humidity, etc. by switching a switch or the like only when necessary.

The present invention has been made in view of the above points, and displays numerical information, clock information, and measured value information by switching on the display of a calculator.
An electronic desktop calculator that automatically measures and stores analog data based on the built-in clock information, allowing you to check it later by simply manually testing analog data at any time using the keyboard. The purpose is to provide

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is an external view of a calculator that is an embodiment of the present invention. In the figure, 1 is the main body, 2H display, and 3 is a keyboard section.In addition to numerical keys and function keys, this keyboard section 3 includes a date key 5, a time key 6, a temperature key 7, a mode changeover switch 8, etc. is provided. 7 is a part of a sensor for temperature detection. Further, the display 2 can be used with a calculation function, a clock function, and a temperature measurement function by changing the display format for each function by selecting the mode changeover switch 8 of the keyboard 3. FIG. 2 is a diagram showing this situation, and (a) shows all the display elements that the display 2 has. An example in which the mode selector switch 8 is set to calculation mode CAL is shown in FIG. 2(b), which is the same as a conventional 8-digit, 1-memory calculator.

When the mode selector switch 8 is set to SET and calendar information and time information are entered using the numerical keys, date key 5, and time key 6, the clock function is set.When the mode selector switch 8 is set to TM, the clock function is set. Time information is displayed in hours, minutes and seconds.

In this example, it is 10:25:36. When the date key is pressed in this state, date information as shown in FIG. 2(d) is displayed on the display 2. In this example, December 31, 0981
It is day. The specifications of these so-called clock calculators are the same as conventional ones, but when the temperature key 4 according to the present invention is pressed, the current temperature is displayed on the display 2 in the format shown in FIG. 2(e). A °C mark indicating the displayed temperature unit appears together with a numerical value, which in the example shows 23 °C. When the temperature key 4 is further pressed from this state, the contents of the display 2 will change to the format shown in Figure 2(f), where 23-00 indicates the time and 15
℃ indicates the temperature, and the temperature at 11 p.m. (11 p.m.) was 15℃. When the temperature key 4 is further pressed, a message appears as shown in FIG. 2(g), indicating that the temperature at 0 o'clock was 6°C. Then, when the temperature key 4 is pressed again, the screen shown in Fig. 2 (h) shows that the temperature at 1 o'clock was 13°C (3°C below zero).

As described above, the thermometer-equipped calculator according to the present invention can measure the temperature at the time of double pressure, store it in the memory, and recall it later by operation. The principle of operation will be explained in more detail using the block diagram of the calculator shown in FIG. 1 shown in FIG. 3 and the timing chart shown in FIG. 4 showing the operation of the block diagram shown in FIG. In FIG. 3, block I has the structure of a calculator with a clock, and is obtained by an oscillator 14 such as a crystal oscillator and a reference pulse oscillation circuit 15, and uses a reference pulse as a multi-clock pulse to operate an arithmetic circuit 17. Arithmetic circuit 17
The operation of ROM is performed by manual key command from keyboard 3.
The data is processed according to fixed instructions stored in advance in memory 18 and stored in memory 19, and at the same time, display register 1
3 and displayed on the display 2 via the decoder driver 20.

The clock function is still configured by counting a signal obtained by frequency-dividing the reference pulse by a frequency dividing circuit 16 using an arithmetic circuit 17 in accordance with a fixed instruction stored in advance in a ROM 18. The block proof is a temperature measurement unit according to the present invention, and in this embodiment, a sensor 9 such as a thermistor detects temperature information by a change in resistance value, etc., and a temperature-pulse width conversion circuit l.
The explanation is based on a method in which the temperature is converted into the duty width of a pulse using O to perform ph-D conversion. Figure 4 is its timing chart (al is the reference pulse, which is shared with the clock pulse of the arithmetic circuit and the reference pulse of the clock function, and is the waveform at point a in Figure 3 (below, a shown in Figure 3).
The points ˜e correspond to the waveforms a) to e) in FIG. 4). In FIG. 4(b), the sampling period for temperature measurement is determined by a pulse obtained by frequency-dividing the reference pulse (a), and the period of the temperature-pulse width conversion circuit IO is determined. Figure 4 (
C) is a pulse obtained by further dividing the frequency of (b) and is used as a timing signal to reset the counter 12 that counts temperature information as digital information and to transfer the counter information to an arithmetic circuit for display or accumulation. Figure 4(d) is
This is an output waveform of the temperature-pulse width conversion circuit IO, which is output as a change in the width of pt based on temperature information converted into a resistance value by the sensor 9. 11 is an AND circuit that combines the reference pulse a and the output of the temperature-pulse width conversion circuit 10 (A of dl).
By functioning as an ND gate and sending its output e to the counter 12 for counting, PH-D conversion is executed through the process of temperature→resistance value→pulse width→gate time→counting the number of pulses. FIG. 4(e) shows the pulse output by the AND circuit 11 by ANDing the inputs (a) and (d). Figure 4fcr) shows the temperature (d)
This shows the state of the output of the temperature-pulse width conversion circuit 10 when the temperature is low and when the temperature is high.(C') is a signal passed through the AND circuit 11. It has become. The temperature information counted by the counter in this way is processed by the pulse calculation circuit 1 shown in FIG. 4(C).
The temperature information transferred to the display register 13 is transferred to the display register 13 and digitally displayed on the display 2 via the decoder driver 20. When the arithmetic circuit 17 detects the hour on the clock information according to the instructions still stored in the ROM 18, it automatically stores the temperature information together with the time information in the memory 19, so that it can be recalled later by operating the temperature key 4. It is possible. The memory capacity can be increased further if you want to retain more than 24 records for 24 hours, if the temperature information stored in the memory is rewritten with new information after a certain period of time, for example one day. If this is the case, you can also add date information.

In this embodiment, the explanation is based on the assumption that the current temperature is displayed every time the temperature key 4 is operated, and the temperature of the clock is automatically memorized every time the pressure is doubled. Possible applications include setting the temperature and automatically storing the temperature at that time, and setting the automatic storage time interval arbitrarily (for example, every 5 minutes). It goes without saying that not only the temperature but also information such as humidity can be automatically measured by changing the sensor.

As explained above, according to the present invention, in a so-called sensor-equipped calculator that incorporates a function to measure analog time such as temperature and humidity by effectively utilizing the time information of the clock-equipped calculator, To provide a calculator capable of exhibiting an extremely useful function of automatically measuring an analog quantity according to time, storing the measured values, and checking the measured values later without an operator. I can do it.

[Brief explanation of drawings]

Fig. 1 is an external view of a calculator that is an embodiment of the present invention;
5 is a diagram showing an example of display. FIG. 3 is a block diagram showing the configuration of the calculator shown in FIG. 1. FIG. 4 is a timing chart showing the operating state. 8 is a sensor part 8 is a mode changeover switch 10 is a temperature-pulse width conversion circuit 12 is a counter 15 is a reference pulse detection circuit 16 is a frequency dividing circuit 17 is an arithmetic circuit 18 is a ROM.

Claims (1)

[Claims] A clock circuit and temperature for measuring date and time. In an electronic desktop calculator having a measurement circuit for measuring humidity, etc. A measuring means for measuring the temperature, humidity, etc. at regular time intervals based on time information obtained from the clock circuit; and a storage means for storing measured values measured by the measuring means at regular time intervals. , an instruction means for instructing to sequentially display the measured values stored in the storage means on a display device.