Method for digital control measuring temperature of water heater and apparatus therefor

A technology of digital control and temperature measurement device, which is applied to measurement devices, fluid heaters, electric devices, etc., can solve the problems of market sales restrictions and high prices, and achieve high qualification rate and stability, low price, and simple software. Effect
CN1501034AInactive Publication Date: 2004-06-02厦门金明达科技发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
厦门金明达科技发展有限公司
Publication Date
2004-06-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to temperature measuring method and device, and is especially temperature measuring method and device with thermistor set in special circuit. The temperature information the thermistor senses is converted into digital temperature data in a microprocessor. The present invention features the thermistor connected serially in an RC multivibrator, the RC multivibrator with output connected to one of the interruption interface of microprocessor; the microprocessor counting the output pulses of the RC multivibrator under the timing interruption to obtain digital frequency data; and the table look-up process of the microprocessor to convert the digital frequency data into digital temperature data for corresponding control. The temperature measuring device is one RC multivibrator comprising two NOT gates, one resistor, one thermistor, one capacitor and one drive amplifier, and has low cost.
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Description

Technical field

[0001] The invention relates to a temperature measuring method and a temperature measuring device, in particular to a method and a temperature measuring device for measuring temperature by placing a thermistor in a specially used circuit. Background technique

[0002] Low-cost single-chip microprocessor control equipment used in places where the temperature change process is slow such as digitally controlled water heaters. The existing temperature measuring device uses a thermistor as a sensor, and the analog voltage output by it is passed by the A / The D converter converts it into a digital quantity, and the single-chip microprocessor controls the water heater accordingly according to the corresponding relationship between the digital quantity and the temperature. These devices are limited in market sales due to the need to use a higher-priced single-chip microprocessor with an A / D converter and a higher price. Contents of the invention

[0003] The prese...

Claims

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