CN201060063Y

CN201060063Y - Intelligent type temperature sensor

Info

Publication number: CN201060063Y
Application number: CNU2007200412011U
Authority: CN
Inventors: 陈柏志
Original assignee: EMA ELECTRONICS Ltd
Current assignee: EMA ELECTRONICS Ltd
Priority date: 2007-07-31
Filing date: 2007-07-31
Publication date: 2008-05-14
Anticipated expiration: 2017-07-31

Abstract

An intelligent temperature sensor comprises a shell and a detecting bar. One end of the detecting bar is connected with the shell, and the other end of the detecting bar is provided with a temperature detecting unit inside. The output end of the temperature detecting unit is connected with a single chip computer. After data is processed by the single chip computer, results can be shown on a display unit. The single chip computer is arranged in the shell, and the display unit is arranged on the shell. The utility model simplifies circuits and improves the measuring accuracy; meanwhile, the utility model also has the function of offset correction. With small structure, the utility model can be assembled by opening holes on pipelines; and the diameter of a probe is less than or equal to 10 mm and almost does not produce any pressure loss. The stainless steel detecting bar not only can increase the corrosion resistance of products, but also can improve the texture of products. For the single chip computer is used to process data, the operation of users is more flexible.

Description

Intelligent temperature sensor

Technical field

The utility model relates to a kind of temperature sensor, especially a kind of intelligent temperature sensor of high-precision digital.

Background technology

Temperature sensor is used for temperature monitoring system, when temperature reaches the threshold values of setting, produces detection signal, is used to protect the interlock protection system.Temperature sensor thermal resistor commonly used is as sensing element.Because the output of the voltage of thermal resistor does not have linear relationship with temperature, need just can obtain temperature accurately by tabling look-up or adding linearizer.And thermal resistor is less at the high temperature section voltage change ratio, is difficult for differentiating, and causes thermometric error bigger.In addition, the thermal resistor product there are differences between different batches, and the electronic response performance is inconsistent.Thereby, all need to carry out adjustment before the use, when a large amount of production, increase cost and time.Analyze from cost, though the price of single thermal resistor is low, it must cooperate related elements just can reach the accuracy of integrated circuit temperature sensor, so see on the whole, the required cost of thermal resistor is high all the better.

Summary of the invention

Problem to be solved in the utility model is: the low precision of the measurement of available technology adopting thermal resistor, and user installation, inconvenience is safeguarded in operation, cost is higher.

The technical solution of the utility model is: intelligent temperature sensor, comprise housing and probe, probe one end is connected with housing, other end built-in temperature detecting unit, the output terminal of temperature detecting unit connects single-chip microcomputer, after the single-chip microcomputer deal with data on display unit display result, single-chip microcomputer is positioned at housing, display unit is on housing.

The heat conductive silica gel of perfusion high thermal conductivity coefficient between temperature detecting unit and the probe.Be provided with the reference potential generator, connect single-chip microcomputer, be used to offer temperature sense resistance reference voltage; Also be provided with the voltage range learning device, its input end connects single-chip microcomputer, and output terminal connects the reference potential generator, is used for manually being provided with the temperature test scope.

The utility model probe diameter is not more than 10mm, the single digital circuit integrated chip that adopts based on the PT100 temperature sensor of temperature detection, and probe is the stainless steel probe.

The utility model has been simplified circuit design, has improved measuring accuracy, also has the function of offset calibration simultaneously, and structure is small and exquisite, only need perforate can install on pipeline, and probe diameter is not more than 10mm, produces any pressure loss hardly; Stainless probe has not only increased the corrosion resistance of product, and makes product seem to have more texture; Owing to adopted the single-chip microcomputer deal with data, user's operation is more flexible.

Description of drawings

Fig. 1 is the utility model structured flowchart.

Fig. 2 is the utility model embodiment output synoptic diagram that lags behind.

Fig. 3 is the utility model embodiment window output synoptic diagram.

Fig. 4 is the utility model outside drawing.

Embodiment

As shown in Figure 1, the output terminal of the utility model temperature detecting unit connects single-chip microcomputer, after the single-chip microcomputer deal with data on display unit displays temperature, owing to use the single-chip microcomputer deal with data, have the multiple way of output to select for the user, output can be selected by menu: 1. lag behind and export 2. window output.

The output that lags behind, as Fig. 2:

If system temperature is with default similar, hysteresis phenomenon remains on the state stably of exporting so.When system temperature raise, output terminal can reach the point (SP1) of opening switch; When system temperature reduced again, output terminal can reach the point (rP1) of off switch.The method of adjusting that lags behind is: the point of at first opening switch determines that difference as requested redefines again then.

Window output, as Fig. 3:

Interaction energy by window monitors clear and definite can receivedly being worth.When system temperature is being opened (SP1) and closed when changing between (rP1), (window role/NO) or disconnect (window role/NC) is connected in output.By the different width that can set window of SP1 and rP1, SP1 is top value, and rP1 is following value.

The utility model temperature section adopts the digital circuit integrated chip based on the PT100 temperature sensor, as TSIC206, is encapsulated in probe segment, and the heat conductive silica gel of perfusion high thermal conductivity coefficient, to improve the susceptibility and the precision of thermometric.Fig. 4 is the utility model outside drawing, probe probe segment diameter 8mm, display unit also are provided with the LED lamp of red superbright except charactron displays temperature and menu, be used for showing the current temperature unit and the output state of switching value, the user is come into plain view to the state when front sensor.When the outside provides voltage, install and be operational mode (normal mode of operation).

The output valve of simulating signal is relevant with system temperature, and is as shown in table 1, and the user can be provided with the starting point and the end point of analog quantity according to the actual needs easily by menu, thereby the output that makes analog quantity is 0 ... 10V or 4 ... change between the 20mA.The charactron acquiescence is shown as the temperature of current system; The state of switch when the LED lamp is represented current temperature displayed unit and transistor output.

Being operating as of the utility model button:

When pressing " pattern/carriage return " key very soon, install and be the readable display mode of parameter value.Process that device is inner and output still are operational mode.

Whenever click " pattern/enter " button, a pad name will occur.Successively as shown in table 1.

When pressing " set " button fast, the corresponding parameters value shows 5 seconds, and later device was got back to operational mode in 5 seconds.

Table 1

Wherein first classify setup menu as, second classifies the menu function note as, and the 3rd classifies parameter as is provided with scope, and the 4th classifies the note of the scope of setting as, remarks explanation menu object.Form last column is the setting of distance learning line, and its is only at learning functionality of temperature, with " the high some study " in the menu " low spot study " function is identical, and purpose is the design temperature scope.This function setting is to make things convenient for the user, execute-in-place.

The utility model adopts advanced digital temperature sensor to replace traditional thermal resistor temperature sensing device, has so not only simplified circuit design greatly, has also improved the precision of measuring simultaneously, also has the function of offset calibration simultaneously, as table 2:

Table 2

Claims

1. intelligent temperature sensor, it is characterized in that comprising housing and probe, probe one end is connected with housing, other end built-in temperature detecting unit, the output terminal of temperature detecting unit connects single-chip microcomputer, after the single-chip microcomputer deal with data on display unit display result, single-chip microcomputer is positioned at housing, display unit is on housing.

2. intelligent temperature sensor according to claim 1 is characterized in that between temperature detecting unit and the probe heat conductive silica gel of perfusion high thermal conductivity coefficient.

3. intelligent temperature sensor according to claim 1 and 2 is characterized in that being provided with the reference potential generator, connects single-chip microcomputer, is used to offer temperature sense resistance reference voltage.

4. intelligent temperature sensor according to claim 3 is characterized in that also being provided with the voltage range learning device, and its input end connects single-chip microcomputer, and output terminal connects the reference potential generator, is used for manually being provided with the temperature test scope.

5. intelligent temperature sensor according to claim 1 and 2 is characterized in that probe diameter is not more than 10mm.

6. intelligent temperature sensor according to claim 1 and 2 is characterized in that temperature detecting unit adopts the digital integrated circuit chip based on the PT100 temperature sensor, and probe is the stainless steel probe.