PL97740B2 - - Google Patents
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- Publication number
- PL97740B2 PL97740B2 PL185255A PL18525575A PL97740B2 PL 97740 B2 PL97740 B2 PL 97740B2 PL 185255 A PL185255 A PL 185255A PL 18525575 A PL18525575 A PL 18525575A PL 97740 B2 PL97740 B2 PL 97740B2
- Authority
- PL
- Poland
- Prior art keywords
- temperature
- thermistor
- measuring
- resistors
- voltage divider
- Prior art date
Links
- 238000005259 measurement Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
Przedmiotem wynalazku jest uklad do pomiaru temperatury, zwlaszcza zdalnego z wybieraniem punktów pomiarowych. Uklad do pomiaru temperatury za pomoca termistora, czy termistorów znajduje zastosowanie przy zdalnym pomiarze temperatury w wielu punktach obiektów trudnodostepnych, na przyklad w powlokach chlodni kominowych, czy innych budowlach wiezowych.The subject of the invention is a system for measuring temperature, in particular a remote one with selecting points measuring. The system for measuring temperature by means of a thermistor or thermistors is used for remote temperature measurement at many points of hard-to-reach objects, for example in coatings cooling towers or other tower structures.
Termistory sa czujnikiem temperatury, powszechnie stosowanym w wielu urzadzeniach pomiarowo-kon¬ trolnych. Tradycyjnie, stosowane jest bezposrednie polaczenie termistora, zamontowanego na obiekcie, którego temperatura ma byc mierzona, z pozostalymi elementami ukladu, takimi jak zródlo zasilania czy miernik wielkosci elektrycznej. W takim ukladzie polaczen sygnal elektryczny, zbierany z termistora zalezy wykladniczo od mierzonej temperatury, co powoduje, ze czulosc ukladu i dokladnosc odczytu wartosci temperatury w róznych przedzialach skali temperatury jest niejednakowa. Ponadto, przy tradycyjnym ukladzie polaczen, sygnal elektryczny zbierany bezposrednio z termistora jest stosunkowo niewielki, co utrudnia lub wrecz unie¬ mozliwia pomiary w warunkach wystepowania wysokiego poziomu zaklócen elektrycznych, na przyklad na terenie elektrowni.Thermistors are a temperature sensor that is commonly used in many measuring and convection devices trolls. Traditionally, a direct thermistor connection is used, which is mounted on the object where the the temperature is to be measured with the rest of the system, such as the power source or the meter electric size. In such a circuit arrangement, the electrical signal collected from the thermistor depends exponentially on the measured temperature, which results in the sensitivity of the system and the accuracy of the temperature reading it is different in different ranges of the scale. In addition, with the traditional connection, the electric signal collected directly from the thermistor is relatively small, which makes it difficult or even uninterrupted enables measurements in conditions of high electrical noise, for example power plant area.
Istote wynalazku stanowi uklad do pomiaru temperatury za pomoca termistora, polaczonego równolegle z jednym z elementów zlozonego z dwu rezystorów dzielnika napiecia, stanowiacego obciazenie zródla zasilania ukladu pomiarowego.The essence of the invention is a system for measuring temperature with a thermistor connected in parallel with one of the elements of a voltage divider consisting of two resistors, which is the load of the power source measuring system.
Zaleta ukladu w porównaniu z dotychczasowym stanem techniki jest jego prosta budowa, jak i stosowanie ukladu w warunkach istnienia wysokiego poziomu zaklócen elektrycznych. Dobór rezystorów wchodzacych w sklad dzielnika napiecia pozwala osiagnac liniowa zaleznosc sygnalu elektrycznego od temperatury. Tym samym zapewniona jest stalosc czulosci ukladu i dokladnosci odczytu wartosci temperatury w calym przedziale pomiarowym.The advantage of the system compared to the prior art is its simple structure and use system under high-noise electrical noise conditions. Selection of incoming resistors The composition of the voltage divider allows to achieve a linear dependence of the electric signal on temperature. This thus, the system's sensitivity is stable and the temperature reading is accurate over the entire range measuring.
Przyklad rozwiazania wedlug wynalazku, uwidoczniony jest na rysunku, na którym fig. 1 przedstawia schemat blokowy urzadzenia, a fig. 2 — charakterystyke ukladu.2 97 740 Uklad sklada sie z zasilacza 1 obciazonego szeregowo polaczonymi rezystorami 2 i 3, stanowiacymi dzielnik napiecia. Równolegle do rezystora 3 podlaczony jest termistor 4, umieszczony na badanym obiekcie 5.An example of the solution according to the invention is shown in the drawing in which Fig. 1 shows block diagram of the device, and fig. 2 - system characteristics 2 97 740 The system consists of a power supply 1 loaded in series with resistors 2 and 3, which are voltage divider. In parallel to the resistor 3, a thermistor 4 is connected, located on the tested object 5.
Wynik pomiaru jest rejestrowany za pomoca woltomierza cyfrowego 6 polaczonego równolegle z rezystorem 3.The measurement result is recorded with a digital voltmeter 6 connected in parallel with a resistor 3.
Sprzezenie woltomierza cyfrowego 6 z ukladem rejestracji danych na tasmie perforowanej 7, pozwala na szybkie opracowanie wyników pomiarów za pomoca maszyny cyfrowej. Wlaczenie w uklad wybieraka sygnalu 8 pozwa¬ la na wybieranie w zaprogramowanej kolejnosci sygnalów pochodzacych od wielu termistorów 4 umieszczonych w wielu róznych punktach na badanym obiekcie 5. Czujniki temperatury, termistory 4, zamontowane na badany- m obiekcie 5, polaczone sa z pozostala czescia ukladu pomiarowego, w sklad którego wchodza zasilacz 1, re¬ zystory 2 i 3, woltomierz cyfrowy 6, perforator 7 i wybierak sygnalu 8, za pomoca dlugiej linii przewodowej* Zaleznosc mierzonego i rejestrowanego przez uklad sygnalu Uw od temperatury obiektu I, na przyklad komina, na którym umieszczony jest czujnik temperatury, termistor 4, przedstawiona jest na fig. 2.The connection of the digital voltmeter 6 with the data recording system on the perforated tape 7 allows for quick operation processing of measurement results using a digital machine. Engaging the signal selector 8 will allow It is possible to select the signals coming from a plurality of thermistors 4 placed in a programmed sequence at many different points on the tested object 5. Temperature sensors, 4 thermistors, mounted on the tested object m object 5, are connected with the rest of the measuring system, which includes the power supply 1, resistors 2 and 3, digital voltmeter 6, perforator 7 and selector 8, using long wireline * The dependence of the Uw signal measured and registered by the system on the object temperature I, for example a chimney with a temperature sensor, thermistor 4, is shown in Fig. 2.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18525575A PL97740B1 (en) | 1975-12-03 | 1975-12-03 | SYSTEM FOR MEASURING TEMPERATURE, ESPECIALLY REMOTE, WITH SELECTING THE MEASURING POINTS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18525575A PL97740B1 (en) | 1975-12-03 | 1975-12-03 | SYSTEM FOR MEASURING TEMPERATURE, ESPECIALLY REMOTE, WITH SELECTING THE MEASURING POINTS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL97740B1 PL97740B1 (en) | 1978-03-30 |
| PL97740B2 true PL97740B2 (en) | 1978-03-31 |
Family
ID=19974544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18525575A PL97740B1 (en) | 1975-12-03 | 1975-12-03 | SYSTEM FOR MEASURING TEMPERATURE, ESPECIALLY REMOTE, WITH SELECTING THE MEASURING POINTS |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL97740B1 (en) |
-
1975
- 1975-12-03 PL PL18525575A patent/PL97740B1/en unknown
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