CN2344765Y - Electromechanical pointer-type precision temp. humidometer - Google Patents

Abstract

The utility model relates to an electromechanical pointer type precise temperature and humidity meter which is composed of a mechanical pointer type thermometer, an electronic pointer type hygrometer, a meter disc and a battery. The utility model is characterized in that a mechanical thermosensitive element is used for driving a pointer to display temperature; a high molecular humidity sensitive element and a special circuit are used for driving a precise meter machine core pointer to display environmental humidity; the battery is used for supplying electricity, the thermometer and the hygrometer are installed on the same meter disc or are respectively and singly installed on respective meter discs; the meter disc is marked with scales for instructing the temperature values and the humidity values of environment. The utility model can be appended with a timing clock or a gas pressure meter for forming a multifunctional instrument, the utility model is suitable for production testing departments or computer rooms, muniment rooms, libraries, hospitals, families and other occasions, and the utility model has the advantages of direct viewing, convenience, simple structure and high precision and is an electromechanical integrated new instrument with low cost and high durability.

Description

The accurate thermohygrometer of a kind of electromechanical pointer

The utility model relates to the instrument of a kind of measures ambient temperature and relative humidity, refers to a kind of pair of pointer, the accurate novel instrument of electromechanical integration especially.Belong to the general instrument technical field.

The present wet and dry bulb thermohygrometer of using will be recognized and read and calculate temperature gap and just obtain the value that wets again by tabling look-up; Need under the one glass bead, often to add water in the use, the water quality impact precision, this table ℃ under can not use, the glass-tube temperature is shown frangible bad, observe not directly perceived, defectives such as moulding difference.Hairiness hair style humidometer in addition, its complex structure, precision is also not high.Also have mechanically deform formula thermohygrometer, though the structure of signing an undertaking is simple, indicate advantages such as directly perceived, its precision, stability etc. are all not ideal enough.

The utility model purpose is: overcome the shortcoming of above-mentioned various instrument, design and a kind ofly supply with the electronics humidity sensor with battery and realize hygrometric, combine with stable mechanical thermometric, can make the instrument power consumption little, linearity height.Measuring accuracy can reach micron order.

Design proposal of the present utility model is: the accurate thermohygrometer of a kind of electromechanical pointer, mainly by dial plate, temperature pointer, humidity pointer, temperature indication gear train, humidity indicating mechanism forms, it is characterized in that: temperature and humidity indicating mechanism is separate to be installed in same dial plate or respectively on dial plate separately, its core component of temperature pointer gear train is a thermal sensing element, this is a volute spring of being made a balance-like by bimetallic material, its the inner is connected on the pointer transmission shaft, a through hole on the support is passed in the outer end, swing in the stationary shaft bearing sleeve by rotation axis drive needle tubing cover and pointer, bimetallic strip is to be combined by two kinds of different metals, the expansion coefficient of having nothing in common with each other, when gradient of temperature, sheet metal produces flexural deformation, driving rotation axis rotates together with pointer, temperature value and pointer displacement amount are curved line relations, so scale mark is one section curve, thereby realize the direct indication of ambient temperature value; Humidity indicating mechanism mainly is made up of high molecule humidity sensor, circuit board, scale, humidity adjuster and battery, and Cu is a high molecule humidity sensor, U ₁-U ₄Be Schmidt trigger, shown in circuit diagram, C ₁, U ₁, R ₁Form astable multivibrator, C ₂, U ₂, R ₂Constitute monostalbe trigger, produce pulsewidth for deciding the square wave of pulsewidth, output signal V-; Cu, U ₃, R ₃Also constitute monostalbe trigger, its pulsewidth is linear direct proportion variation, output drive signal V+ with the humidity of environment.V+ and V-directly drive watch core, drive needle deflection, in order to the indication humidity value; D ₁, R ₄, U ₄, D ₂Constitute the low-voltage alarm, when the battery supply undertension, when influencing measuring accuracy, U ₄The output high level, it is luminous to drive D2, in order to alarm.Utilize the utility model design proposal can produce multiple instrument, for example: the single humidometer of independent measurement humidity value, measure the instrument that temperature, humidity have clocking capability again with liquid crystal digital table pack Cheng Jike, but with crystal clock form one not only displays temperature, humidity but also can show the time, the instrument of minute, second and be installed together with rain glass etc. and constitute multi-functional practical instrument.

Advantage and effect that this is practical: read intuitively, easy to use, simple in structure, and the precision height, can reach micron order (humidity is better than 3%RH), be that a kind of price is low, the new instrument of long-lived electromechanical integration.Structure displays temperature of the present utility model and humidity value, it can constitute multiple multifunctional assembled instrument with instrument such as timing or atmospheric pressure values.The electric circuit characteristic of the utility model design is low in energy consumption, without voltage-stabilizing device, dry cell power supply can produce assurance measuring accuracy, linear response, pulse difference output drives (be the wide driving of interrupting pulse, average voltage level is represented relative humidity) directly drive current watch core, voltage watch core etc.The utility model is applicable to pilot production department, archives, library, computer house, hospital, hotel and family.Below in conjunction with accompanying drawing for 5 embodiment:

Fig. 1 is the accurate thermohygrometer overall construction drawing of a kind of electromechanical pointer.Fig. 2 is the accurate thermohygrometer humidity display of an a kind of electromechanical pointer basic circuit diagram.Fig. 3 is the accurate thermohygrometer temperature of a kind of electromechanical pointer indicating structure figure.Fig. 4 is the accurate thermohygrometer front elevation of a kind of electromechanical pointer.(embodiment 1) Fig. 5 is the front elevation of embodiment 2.Fig. 6 is the front elevation of embodiment 3.Fig. 7 is the front elevation of embodiment 4.Fig. 8 is the front elevation of embodiment 5.

Embodiment 1

The accurate thermohygrometer of a kind of electromechanical pointer, as shown in Figure 4, its structure as shown in Figure 1, by dial plate [9], temperature pointer [2], humidity pointer [8], temperature pointer gear train and humidity indicating mechanism form, it is characterized in that: temperature and humidity indicates that two mechanisms are separate to be installed on the same dial plate [9], the temperature pointer gear train as shown in Figure 3, its core component is a thermal sensing element [6], this is a volute spring [6] of being made a balance-like by bimetallic material 5J18 or 5J19, its inner concatenation pointer rotation axis [5], a through hole on the support [7] is passed in its outer end, is swung in fixed hub [3] by rotation axis [5] drive needle tubing cover [1] and pointer [2].Bimetallic strip is combined into by two kinds of different metals, the expansion coefficient of having nothing in common with each other, when gradient of temperature, sheet metal produces flexural deformation, driving rotation axis rotates together with pointer, temperature value and pointer displacement amount are curved line relations, so scale mark [4] is one section curve, thereby realize the direct indication of ambient temperature value; Humidity indicating mechanism mainly is made up of high molecule humidity sensor [11], circuit board [10], scale [13], humidity adjuster [12] and battery [14] as shown in Figure 1, its circuit diagram as shown in Figure 2, Cu is the macromolecule humidity-sensitive capacitor, U ₁-U ₄Be Schmidt trigger, E is a dry battery power, and its principle of work is: C ₁, U ₁, R ₁Form astable multivibrator, C ₂, U ₂, R ₂Constitute monostalbe trigger, produce pulsewidth for deciding the square wave of pulsewidth, output signal V-; Cu, U ₃, R ₃Also constitute monostalbe trigger, its pulsewidth is linear direct proportion variation, output drive signal V+ with the humidity of environment.V+ and V-directly drive watch core, drive needle deflection, in order to the indication humidity value.D ₁, R ₄, U ₄, D ₂Constitute the low-voltage alarm, when battery supply E undertension, when influencing measuring accuracy, U ₄The output high level drives D ₂Luminous, in order to alarm.Embodiment 2

The accurate thermohygrometer of a kind of electromechanical pointer, its structure and embodiment 1 are described identical, are characterized in an additional liquid crystal display clock [15] on this table, as shown in Figure 5.Embodiment 3

The accurate thermohygrometer of a kind of electromechanical pointer, its structure and embodiment 1 are described identical, are characterized in additional-quartzy movement clock [16] on this table, as shown in Figure 6.Embodiment 4

The accurate humidometer of a kind of simple pointer formula, the humidity indicating mechanism described in its structure and the embodiment 1 is identical, and this table only is used for the relative humidity of display environment, as shown in Figure 7.Embodiment 5

The accurate thermohygrometer of a kind of electromechanical pointer, its structure and embodiment 1 are described identical, are characterized in independently mechanism's use dial plate separately of two of this table temperature and humidity, and add a rain glass [17], the composition multifunction instrument.As shown in Figure 8.

Claims (5)

1, the accurate thermohygrometer of a kind of electromechanical pointer, mainly by dial plate, temperature pointer, humidity pointer, temperature indication gear train, humidity indicating mechanism forms, it is characterized in that: temperature and humidity indicating mechanism is separate to be installed in same dial plate or respectively on dial plate separately, its core component of temperature pointer gear train is a thermal sensing element, this is a volute spring of being made a balance-like by bimetallic material, its the inner is connected on the pointer transmission shaft, a through hole on the support is passed in the outer end, swing in the stationary shaft bearing sleeve by rotation axis drive needle tubing cover and pointer, bimetallic strip is to be combined by two kinds of different metals, the expansion coefficient of having nothing in common with each other, when gradient of temperature, sheet metal produces flexural deformation, driving rotation axis rotates together with pointer, temperature value and pointer displacement amount are curved line relations, so scale mark is one section curve, thereby realize the direct indication of ambient temperature value; Humidity indicating mechanism mainly is made up of high molecule humidity sensor, circuit board, scale, humidity adjuster and battery, and Cu is a high molecule humidity sensor, U ₁-U ₄Be Schmidt trigger, C ₁, U ₁, R ₁Form astable multivibrator, C ₂, U ₂, R ₂Constitute monostalbe trigger, produce pulsewidth for deciding the square wave of pulsewidth, output signal V-; Cu, U ₃, R ₃Also constitute monostalbe trigger, its pulsewidth is linear direct proportion variation, output drive signal V+ with the humidity of environment.V+ and V-directly drive watch core, drive needle deflection, in order to the indication humidity value; D ₁, R ₄, U ₄, D ₂Constitute the low-voltage alarm, when the battery supply undertension, when influencing measuring accuracy, U ₄The output high level, drive point D2 is luminous, in order to alarm, utilize the utility model design proposal can produce multiple instrument, for example: the single humidometer of independent measurement humidity value, measure the instrument that temperature, humidity have clocking capability again with liquid crystal digital table pack Cheng Jike, but form not only displays temperature, humidity with crystal clock but also can show the time, the instrument of minute, second and be installed together with rain glass etc. and constitute multi-functional practical instrument.

2, the accurate thermohygrometer of a kind of electromechanical pointer as claimed in claim 1 is characterized in that: additional timing part, realize that by the electronic liquid crystal digital watch time-division shows.

3, the accurate thermohygrometer of a kind of electromechanical pointer as claimed in claim 1 is characterized in that: additional timing part, and when driving pointer and on card, indicate, minute, second with quartz clock movement.

4, the accurate thermohygrometer of a kind of electromechanical pointer as claimed in claim 1, it is characterized in that: an additional rain glass constitutes the practical instrument of multi-functional combination.

5, the accurate thermohygrometer of a kind of electromechanical pointer as claimed in claim 1, it is characterized in that: this table is only installed a structure that shows humidity, becomes the accurate humidometer of simple pointer formula.

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