SU1835056A3 - Digital meter of temperature - Google Patents

Description

The invention relates to devices for temperature measurements and can be used as a temperature sensor for biological and physical objects.

The purpose of the invention is to increase the speed of the meter while maintaining the simplicity of the design.

The drawing shows a block diagram of a device.

The digital temperature meter contains a series-connected temperature sensor 1. a temperature-frequency converter 2, a counter 3 and a digital indicator 4. The second inputs of the counter 3 and indicator 4 are connected to the first and second outputs of the clock 5, the third output of which is connected to the input of the current pulse generator 6. The first output of the current pulse generator 6 under the keys to the temperature sensor 1, and the second to the thermistor 7 located in the environment surrounding the meter.

Digital temperature meter works as follows.

The clock pulse generator 5 starts the current pulse generator 6, the pulse duration of which depends on the ambient temperature in which the thermistor 7 is placed. The current pulses before each measurement clock are fed to temperature sensor 1, heating it up. The smaller the temperature difference between the measured object and the environment, the shorter the pulse duration and the less additional heating of the sensor. From the output of the temperature-frequency converter 2 pulses are supplied to the counter 3, which for a predetermined time

1835056 AZ

183505υ interval (1 s) calculates them, the result is reflected in the digital indicator 4. The display time is determined by the clock 5,

The proposed digital temperature meter allows you to improve performance when measuring the temperature of the skin of the human body up to 5 s.

Claims (1)

SUMMARY OF THE INVENTION A digital temperature meter comprising a temperature sensor in series, a temperature-frequency converter, a counter and a digital indicator, as well as a clock generator, the first input connected to the input of a digital indicator, and the second output 5 connected to a meter, characterized in that a current pulse generator and a thermistor are connected in series to it, while the input of the current pulse generator is connected to the third output of the pulse generator, and its second Exit connected to the temperature sensor. Compiled by L. Petrik Editor Tehred M. Morgenthal Corrector M. Andrushenko Order 2713 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.