JPS6063432A - Temperature measuring device - Google Patents

Abstract

PURPOSE:To recognize immediately the measured temperature at a measuring point by displaying the measuring point and the measured temperature corresponding to the measuring point. CONSTITUTION:Analog data measured by temperature measuring elements 1a, 1b... arranged at individual measuring points are inputted to amplifiers 2a, 2b... and are amplified. Amplifiers 2a, 2b... are scanned by a scanning circuit 91 to lead out amplified outputs to a data bus 31. Amplified outputs outputted to the data bus 31 are converted to digital data by an A/D converter 3 and are inputted to a decoder 4. The decoder 4 converts the output of the A/D converter 3 to a code signal adapted to a number display device 6 for temperature display and gives it to a driver circuit 5. The driver circuit 5 drives the number display device 6 for temperature display in accordance with the output of the decoder 4. Meanwhile, the scanning circuit 91 leads out a code signal indicating the scanned amplifier, and this code signal is inputted to a decoder 92.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature measuring device that measures temperatures at a plurality of measurement points and simultaneously displays the measurement points and the temperatures at the measurement points.

Conventional temperature measuring devices each have a display device for each of a plurality of measurement points, so the display devices are large and require a large installation space. Additionally, there is a problem in that multiple display devices cannot immediately recognize the person in charge at one location.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a temperature measuring device that can immediately measure the measured temperature at a measuring point by displaying the measuring point and the measured temperature corresponding to the measuring point. The purpose is to

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1a, Ib, lc, . . . are temperature measuring elements such as thermistors and thermocouples. 2a, 2b, 2cm...
are amplifiers that amplify the outputs of the 11 elements 1a, Ib, Ic, . . . , respectively. 31 is an increase [11S2a, 2
This is a data bus that connects the outputs of B and 2C- to the A/D converter 3 and the abnormality detection circuit 7. A decoder 4 generates a code signal according to the output of the A/D converter 3 and the output of the abnormality detection circuit 7. 5 is a driver circuit that drives the numerical display for temperature display on the display section 6 according to the output of the decoder 4. Ko989h2C...
This is a scanning circuit that scans the amplifier and outputs a signal indicating which amplifier is being scanned.

A decoder 92 generates a code signal according to the output of the scanning circuit 91. Reference numeral 93 denotes a driver circuit that drives the numerical display device 94 for displaying the temperature measurement point number of the display section 61 in accordance with the code signal that is the output of the decoder 92.

Next, the operation of the temperature measuring device will be explained.

In FIG. 1, temperature measuring elements 1a arranged at each measurement point,
Analog data measured by Ib, 1c, . . . is input to amplifiers 2a, 2b, 2C, . . . and amplified, respectively. The amplifiers 2a, 2b, 2c, . . . are scanned by a scanning circuit 91 and output amplified outputs to the data bus 31. The amplified output output to the data bus 31 is converted into digital data by the A/D converter 3 and input to the decoder 4. The decoder 4 converts the output of the A/D converter 3 into a code signal suitable for the numerical display device 6 for temperature display, and supplies the code signal to the driver circuit 5. The driver circuit 5 drives the temperature display numeric display device 6 according to the output of the decoder 4. On the other hand, scanning circuit 91 derives a code signal indicating the amplifier being scanned, and this code signal is input to decoder 92. The decoder 92 converts the output code signal of the scanning circuit 91 into a code signal suitable for the measurement point number display numeric display device 94 and inputs the converted code signal to the driver 93.

The driver 93 drives the measurement point number display numeric display device u94 in response to the output of the decoder 92 to display numbers.

Here, the abnormality detection circuit 7 is connected to the data bus 31, and the outputs of the amplifier circuits 2a, 2b, 2c, . . .
b, 1c... When outputting an abnormality, the temperature measuring element 1a,
An abnormality such as an open failure or a short circuit failure of Ib, 1c, etc. is detected, and a code signal corresponding to the abnormality is input to the decoder 4. The decoder 41 generates a code signal corresponding to the normal state of the temperature measuring elements 1a, 1b, 1c, . . . and inputs it to the driver circuit 5. In response to the code signal, the driver circuit 5 causes the temperature display numeric display device 6 to display something other than numbers, such as the 1 display shown in FIGS. The letters “H”, 7, “S”, “E”, and “A” as shown in Figure 4 (a), 9 and (b), and rsHJ as shown in Figure 4 (a), 9 and (b).
(abbreviation for SHORT) 9 short circuit fault indication, rOPJ
<0PEN) indicates an open failure.

According to the present invention, since the temperature measuring point display means for displaying data indicating the temperature measuring element and the temperature display means for displaying the temperature of the temperature measuring point are provided, it is possible to It is possible to provide a temperature measuring device that does not require a display device, does not take up installation space, displays temperature measuring points and measured temperatures in a rough manner, and has improved visibility performance.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2, FIG. 3, and FIG. 4 are plan views showing display examples. 1a, 1b, 1c... Temperature measuring elements 2a, 2b, 2
c...Amplifier 6...Numeric display device for temperature display...Abnormality detection circuit 1...Scanning circuit 4...Numeric display device for temperature measurement point number display. Patent applicant Tateishi Electric Co., Ltd.

Claims (1)

[Claims] (1) A plurality of temperature measuring elements, an amplifying means for amplifying the outputs of the plurality of m temperature elements, a scanning means for scanning the amplifying means, and a concentration according to the output of the amplifying means according to the output of the scanning means. Temperature display means for displaying and scanning according to the output of the scanning means. temperature measurement point display means for displaying data indicating which temperature measurement element is being used.