JPS59170736A - Quartz thermometer - Google Patents

Abstract

PURPOSE:To perform exact measurement with a small-sized instrument by providing a quartz oscillator and an active element on the surface of a laminated sintered body to constitute an oscillating part and counting the output signals from the oscillating part. CONSTITUTION:A resistor and a capacitor are laminated and are made ceramic, by which a laminated sintered body 50 is constituted. Transistors 14, 16 and a quartz oscillator 6 are formed on the body 50. The body 50 is held in a case 51 and the output from the body 50 is taken to the outside through an output cable 52 and a connector 53. After the output is divided down by a frequency divider, the divided outputs are counted with a counter. The count value is displayed as a temp. on a display part.

Description

[Detailed description of the invention] The present invention relates to a thermometer using a crystal oscillator.

Conventionally, thermometers used to measure ambient temperature in air or water have used thermometers that use heat-sensitive variable resistance elements such as thermistors or platinum, or that utilize the property that the resonant frequency of crystal oscillators changes depending on the ambient temperature. quartz thermometers are known. Among these thermometers, quartz thermometers are widely used because they can measure temperature with high precision and are suitable for digital signal processing. A conventional crystal thermometer includes a crystal oscillation section including a crystal oscillator, and a counter that counts the output of this oscillation section. As shown in FIG. 1, this crystal oscillator includes a crystal oscillator 6, resistors 7 to 10, capacitors 11 to 13, a transistor 14, and a pair of wires 15 (A-B) connecting the crystal oscillator and the oscillation circuit. (between). This pair of wires is used to separate the oscillator and oscillation circuit so that the tip of the thermometer can be made smaller.

In this case, there is a problem that the equivalent reoutance component of the crystal oscillator changes depending on the length of the bare wires 15, the interval between the bare wires, etc., and the oscillation frequency of the crystal oscillator becomes unstable. Another drawback is that the rate of change in oscillation frequency with respect to ambient temperature changes also changes. In order to solve these problems,
It is desirable to make the length of the pair of wires 15 in Fig. 1 as short as possible, but since the shape of each component is large, the shape is much smaller than when using a single crystal oscillator as a sensor. When measuring the surface temperature of an object or measuring the temperature in a narrow area, it is difficult to accurately measure or measure temperature fluctuations in a short time.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and to propose a compact quartz thermometer that is capable of accurate measurements.

FIG. 2 is a block diagram showing an embodiment of the present invention, which includes a temperature detection section 100, a frequency division section 200 that divides the output of the detection section, a counter 300 that counts the output of the frequency division section 200, and a counter 300 that counts the output of the frequency division section 200. and a display section 400 that displays the output of the section.

FIG. 3 is a partial cross-sectional view showing a specific configuration of the temperature detection section 100. In the figure, a detection unit 100 includes a multilayer sintered body 50 in which a resistor and a capacitor are made of multilayer ceramics.
, transistors 14 and 16 formed on this sintered body, crystal oscillator 6 formed on this sintered body, case 51 holding the sintered body, and output of the sintered body 50 externally. It consists of an output cable 52 and a connector 53.

FIG. 4 is a circuit diagram of a crystal oscillator suitable for the present invention. In the figure, the crystal oscillator of the present invention is provided with one stage of buffer including a transistor 16 in addition to the circuit shown in FIG. It is also possible to prevent changes in the oscillation frequency change rate due to ambient temperature fluctuations.

FIG. 5 is an assembled sectional view of the crystal oscillator shown in FIG. 4 made into a composite laminated ceramic.

In FIG. 5, a plurality of layers of an insulator raw sheet 200 and an electric meter raw sheet 210, a conductor N260 provided on these sheets, and a resistor sheet piece 240 are combined into a fourth layer.
Each capacitor and resistor shown in the figure is formed. For example, the capacitor forming section 320 in FIG. 5 is composed of a dielectric green sheet 210 and conductive layers 26A and 26B forming electrodes formed above and below this sheet 210. Furthermore, in this composite structure, connections between each element such as a resistor and a capacitor are made via a connecting conductor 310 formed so as to penetrate each sheet. The crystal 6 and transistors 14, 16 of the circuit shown in FIG. 4 are located on the top or bottom layer, either on the surface of the composite structure. Further, on the back surface of the composite structure, terminals 330 are formed, which are used for attaching Li and collectors that cannot be formed inside the structure, such as the above-mentioned transistors and crystal resonators, and for connection to external circuits. Note that reference numeral 32ON indicates a capacitor forming portion.

The insulating raw sheet 200 used in the above embodiments contains aluminum oxide 40 to 60% by weight and crystallized glass 40 to 60% by weight.
A mixed powder selected to have a total amount of 100 cm within the composition range of weight is mixed with an organic binder such as polyvinyl butyral, an organic solvent such as butyl calpitol or ethyl cerene lubricant, and BPB (butyl/butyral butyl). glycolate) and other plasticizers to form a slurry.
It is obtained by molding a green sheet of 20 μm to 300 μm onto a polyester film using a slinob casting method such as a doctor blade method, peeling it off, and punching it into desired dimensions. The composition of the crystallized glass powder used here is according to the oxide conversion notation: oxidized button, boron oxide, silicon dioxide, group B element oxide, group IV element (with the exception of return element, silicon, and lead t). <) Oxide with a pick-up ratio of 3-65% and 2-50%, respectively.

1 hour with a composition selected to give ai'100% in the composition range of 4 to 65 inches, 01 to 50%, and 0.02 to 20 inches.
has been completed.

Two-body raw sheet (Ke, k' e20x + Pbun
N bz Oa * WOI powder on F3r fixed scale
After mixing in a ball mill and filtering and drying, the
After pre-baking at 0°C, the powder was pulverized by a hole mill and mixed with a binder organic solvent and a plasticizer, and then mixed with a slip casting method such as a doctor blade method to form a powder with a diameter of 910 μm to 910 μm. 200
A pm sheet was obtained. The ulh used here, the system fee is f
'b(FeNbl/1)(Jj Pb(Fe$WV
S) Os binary complex Herov, x.

The kite compound comes out.

The raw resistor sheet is made by mixing ruthenium dianide powder and the crystallized glass powder used for the raw insulator sheet at a weight ratio of 10:90 to 50:50 to obtain the desired resistance value. Add ethyl cellosolve, butyl calpitol, butyl butyl phthalate, polyvinyl butyral, etc. to form a slurry, and form a film in the same manner as above.
A sheet of 0 μm was obtained. The conductors used for the electrode layers and signal lines are Aμ and Ag.

A paste made by mixing a single metal such as Pd, PT, or an alloy powder containing one or more metals with an organic vehicle is used. After sheets made of such materials are laminated as shown in FIG. 5, they are sintered, and then a crystal resonator and the like are attached.

As a result of realizing a crystal thermometer with the above configuration, it is small,
We were able to create a high-performance crystal thermometer.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an oscillation unit used in a conventional crystal thermometer, Fig. 2 is a block diagram showing an embodiment of the present invention, and Figs. 3 to 5 are details showing a part of the present invention. It is a diagram. In Fig. 3, 6... crystal oscillator, 50...
...Laminated sintered body, 52...Cable, 53
......Connector, 14.16...Transistor. Bamboo 2 Figure 4

Claims (1)

[Scope of Claim] A laminated sintered body having a plurality of insulating layers and at least one dielectric layer and in which a resistor and a capacitor forming a crystal oscillator are formed, and A crystal temperature device comprising: an oscillating section having an attached crystal resonator and an active element; means for counting output signals of the oscillating section; and display means for displaying the output of the counting means. Total.