DE890067C - Arrangement to compensate the temperature error of piezoelectric measuring and control devices - Google Patents
Arrangement to compensate the temperature error of piezoelectric measuring and control devicesInfo
- Publication number
- DE890067C DE890067C DEA9623D DEA0009623D DE890067C DE 890067 C DE890067 C DE 890067C DE A9623 D DEA9623 D DE A9623D DE A0009623 D DEA0009623 D DE A0009623D DE 890067 C DE890067 C DE 890067C
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- capacity
- crystal
- arrangement
- control devices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000013078 crystal Substances 0.000 claims description 13
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/028—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only of generators comprising piezoelectric resonators
Landscapes
- Details Of Flowmeters (AREA)
Description
Anordnung zur Kompensation des Temperaturfehlers piezoelektrischer Meß- und Steuergeräte Piezoelektrische Kristalle, insbesondere Seignettekristalle, zeigen eine gewisse Abhängigkeit ihrer Kapazität von der Temperatur. Bei der Anwendung derartiger Kristalle in elektrischen Meß-oder Steuergeräten kann sich diese Temperaturabhängigkeit unter Umständen störend bemerkbar machen. Eine Beseitigung des Temperatureinflusses durch Einschließen des Kristalles in einen Thermostaten oder einen Behälter mit guter Wärmeisolation ist nicht immer möglich oder doch häufig nur mit einem erheblichen apparativen Aufwand durchzuführen.Arrangement for compensating the temperature error of piezoelectric Measuring and control devices Piezoelectric crystals, in particular Seignette crystals, show a certain dependence of their capacity on the temperature. In the application Such crystals in electrical measuring or control devices can have this temperature dependency may be noticeable in a disturbing way. An elimination of the temperature influence by enclosing the crystal in a thermostat or container Good thermal insulation is not always possible or often only with a considerable amount to carry out equipment expenditure.
Die Erfindung löst .die oben .angedeutete Aufgabe der Beseitigung dieser Temperaturempfindlichkeit auf rein elektrischem Wege, und zwar dadurch, daß parallel zum Piezokristall mindestens eine Spannungsteilerschaltung, bestehend aus einer temperaturempfindlichen und einer temperaturunempfindlichen. Kapazität, gelegt wird, wobei der Abgriff zum Meß- oder Steuerkreis geführt ist. Zu einem besonders guten Albgleich gelangt man bei Anwendung einer temperaturunempfindlichen Kapazität, welche in dem ganzen in Frage kommenden Temperaturbereich höchstens gleich der temperaturempfindlichen Kapazität ist, welche selbst wiederum höchstens gleich der Kapazität des Gerätekristalles ist.The invention solves the problem of elimination indicated above this temperature sensitivity in a purely electrical way, namely by the fact that parallel to the piezo crystal at least one voltage divider circuit, consisting of one temperature-sensitive and one temperature-insensitive. Capacity, laid is, whereby the tap is led to the measuring or control circuit. To one special good night-time is achieved when using a temperature-insensitive capacitance, which in the whole temperature range in question is at most equal to the temperature-sensitive Capacity, which itself is at most equal to the capacity of the device crystal is.
Ein besonders großer Bereich läßt sich mit der Anordnung nach der Erfindung dann temperaturunempfindlich machen, wenn die in der Spannungsteilerschaltung vorgesehene- temperaturempfindliche Kapazität die gleiche Temperaturabhängigkeit wie der Gerätekristall und mindestens annähernd die gleiche thermische Zeitkonstante besitzt. Diese Forderung wird mit der besten Annäherung durch die Anwendung eines dem Gerätekristall gleichartigen piezoelektrisch wirksamen Krstalles in der Spannungsteilerschaltung erreicht. Die Spannungsteilerschaltung selbst .kann in einer einfachen Reihenschaltung der beiden Kapazitäten mit dem Abgriff über .der temperaturempfindlichen Kapazität bestehen. Dieselbe reicht für die meisten Zwecke vollkommen aus. Kommt es jedoch auf einen besonders genauen Abgleich an, kann man zwei :derartige Reihenschaltungen zu einer Brücke zusammenschalten und den Abgriff von der einen Diagonale nehmen.A particularly large area can be achieved with the arrangement according to the Then make the invention insensitive to temperature when the in the voltage divider circuit intended- temperature-sensitive capacitance has the same temperature dependence as the device crystal and has at least approximately the same thermal time constant. This requirement is made with the best approximation through the use of a crystal similar to the device crystal piezoelectrically effective Krstalles achieved in the voltage divider circuit. the Voltage divider circuit itself. Can be in a simple series connection of the two Capacities with the tap on the temperature-sensitive capacitance exist. The same is perfectly adequate for most purposes. However, it comes down to one If you need a particularly precise adjustment, you can do two: such series connections to one Connect the bridge and take the tap off one diagonal.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA9623D DE890067C (en) | 1942-04-21 | 1942-04-21 | Arrangement to compensate the temperature error of piezoelectric measuring and control devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA9623D DE890067C (en) | 1942-04-21 | 1942-04-21 | Arrangement to compensate the temperature error of piezoelectric measuring and control devices |
Publications (1)
Publication Number | Publication Date |
---|---|
DE890067C true DE890067C (en) | 1953-09-17 |
Family
ID=6921831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA9623D Expired DE890067C (en) | 1942-04-21 | 1942-04-21 | Arrangement to compensate the temperature error of piezoelectric measuring and control devices |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE890067C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1293244B (en) * | 1966-09-02 | 1969-04-24 | Siemens Ag | Circuit arrangement for compensating the temperature response of quartz crystals |
-
1942
- 1942-04-21 DE DEA9623D patent/DE890067C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1293244B (en) * | 1966-09-02 | 1969-04-24 | Siemens Ag | Circuit arrangement for compensating the temperature response of quartz crystals |
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