Unlock instant, AI-driven research and patent intelligence for your innovation.

Device using multiple groups of digital potentiometers to simulate Pt 1000 platinum resistor and method of device simulating Pt 1000 platinum resistor

A digital potentiometer and platinum resistance technology, which is applied in the electronic field, can solve the problems of low resolution of digital potentiometers, unsatisfactory precision, complex circuits, etc., and achieve the effect of easy measurement, simple circuit, and overcoming large volume

Inactive Publication Date: 2013-07-10
HARBIN INST OF TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of complex circuits, large volume, low resolution of digital potentiometers and unsatisfactory precision in the process of simulating Pt100 platinum resistance, and further provides a device for simulating Pt100 platinum resistance with multiple sets of digital potentiometers And the method for this device to simulate Pt100 platinum resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device using multiple groups of digital potentiometers to simulate Pt 1000 platinum resistor and method of device simulating Pt 1000 platinum resistor

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination figure 1 Describe this embodiment mode, the device for simulating Pt100 platinum resistors with multiple sets of digital potentiometers described in this embodiment mode, it includes a key input module 1, a temperature calculation module 2, a single-chip microcomputer control circuit 3, a first digital potentiometer 4, a second digital Potentiometer 5, third digital potentiometer 6, first fixed resistor R1, second fixed resistor R2, third fixed resistor R3, first node 7 and second node 8;

[0017] The output terminal of the key input module 1 is connected to the input terminal of the temperature calculation module 2, the output terminal of the temperature calculation module 2 is connected to the input terminal of the single-chip microcomputer control circuit 3, and the three control signal output terminals of the single-chip microcomputer control circuit 3 are respectively connected to the first digital potentio...

specific Embodiment approach 2

[0019] Specific embodiment two: This embodiment further defines the device for simulating Pt100 platinum resistors with multiple groups of digital potentiometers described in specific embodiment one. In this embodiment, the first digital potentiometer 4 and the second digital potentiometer Both the potentiometer 5 and the third digital potentiometer 6 are digital potentiometers with 256 taps and a maximum resistance value of 1kΩ; the fixed resistance value of the first fixed resistor R1 is 300Ω, the fixed resistance value of the second fixed resistor R2 is 80Ω, and the fixed resistance value of the second fixed resistor R2 is 80Ω. The fixed resistance value of the three fixed resistors R3 is 20Ω.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 1 Describe this embodiment, this embodiment is the method for simulating a Pt100 platinum resistance with a device that simulates a Pt100 platinum resistance with multiple groups of digital potentiometers described in any one of the specific embodiments 1 to 2,

[0021] Step 1. Set the current temperature value through the key input module 1;

[0022] Step 2. Calculate the number of taps corresponding to each digital potentiometer at the temperature value through the temperature calculation module 2 according to the indexing table of the Pt100 platinum resistance thermometer;

[0023] Step 3, the single-chip microcomputer control circuit sends control signals to the first digital potentiometer 4, the second digital potentiometer 5 and the third digital potentiometer 6 according to the number of taps of each digital potentiometer obtained in step 2 to realize the adjustment of the first digital potentiometer. Potent...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Resistanceaaaaaaaaaa
Resistanceaaaaaaaaaa
Resistanceaaaaaaaaaa
Login to View More

Abstract

The invention provides a device using multiple groups of digital potentiometers to simulate a Pt 1000 platinum resistor and a method of the device simulating the Pt 1000 platinum resistor, and relates to the technical field of electronics. The device using the multiple groups of digital potentiometers to simulate the Pt 1000 platinum resistor and the method of the device simulating the Pt 1000 platinum resistor aim to solve the problems that a circuit is complex, size is large, a resolution ratio of the digital potentiometers is not high, and a requirement for accuracy cannot be met. According to the device using the multiple groups of digital potentiometers to simulate the Pt 1000 platinum resistor, a current temperature value is set through a key input module; according to a platinum resistor reference table, the numbers of taps needed by each digital potentiometer at different temperatures are calculated through a temperature calculation module; and a single chip microcomputer controls the circuit to send control signals to a first digital potentiometer, a second digital potentiometer and a third digital potentiometer respectively according to the numbers of taps of each digital potentiometer, adjusting of resistance values of the first digital potentiometer, resistance values of the second digital potentiometer and resistance values of the third digital potentiometer is achieved, and then resistance values between a first node and a second node is adjusted. The device using the multiple groups of digital potentiometers to simulate the Pt 1000 platinum resistor and the method of the device simulating the Pt 1000 platinum resistor are suitable for being applied to the existing technical field of electronics.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to the analog technology of Pt100 platinum resistance. Background technique [0002] Platinum resistance is a kind of thermal resistance whose resistance value changes with temperature. In the test and debugging, the method of synthetic resistance is often used to replace platinum resistance. At present, there are several methods for synthesizing resistance: [0003] 1. The variable resistance is obtained by switching the precision resistance through the relay. This method is bulky and the accuracy is difficult to guarantee due to the contact resistance of the relay. [0004] 2. Use operational amplifiers and digital-to-analog converters to form a single-port network and control the ratio of input power to input current through programming to obtain programmable synthetic resistance. But this method has certain limitations, the range of resistance variation is limited, and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01K7/18
Inventor 凤雷刘冰付平尹洪涛乔家庆蒋大鹏蒋明哲张佳宁杜润
Owner HARBIN INST OF TECH