CN202443343U - Workshop stoving varnish voice constant temperature control device - Google Patents
Workshop stoving varnish voice constant temperature control device Download PDFInfo
- Publication number
- CN202443343U CN202443343U CN2012200512294U CN201220051229U CN202443343U CN 202443343 U CN202443343 U CN 202443343U CN 2012200512294 U CN2012200512294 U CN 2012200512294U CN 201220051229 U CN201220051229 U CN 201220051229U CN 202443343 U CN202443343 U CN 202443343U
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- circuit
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- workshop
- temperature
- voltage comparator
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Abstract
The utility model relates to a control device, in particular to a workshop stoving varnish voice constant temperature control device. The workshop stoving varnish voice constant temperature control device comprises a temperature bridge circuit and a voltage comparator circuit. Signals collected by the temperature bridge circuit are transmitted to a triangle wave forming circuit through a differential amplifying circuit, and output signals of the triangle wave forming circuit are sent to a heater trigger circuit and a voice alarm circuit through the voltage comparator circuit. The workshop stoving varnish voice constant temperature control device uses a switching mode and a phase method, namely a periodic switching control method, fixes a period of a switch, and controls temperature by controlling the time ratio of opening and closing. If temperature is high, the opening time of a heater is reduced, and the closing time of the heater is increased; if temperature is low, the opening time of the heater is increased, and the closing time of the heater is reduced, and therefore the role of temperature control is achieved. In addition, due to the fact that the period is just about 30 seconds, and change of the time ratio of opening and closing is a gradually changing process, temperature control precision is higher and temperature fluctuation is small.
Description
Technical field
The utility model relates to a kind of control device, and what be specifically related to is a kind of workshop baking vanish voice thermostatically-controlled equipment.
Background technology
The temperature-controlled process of tradition constant temperature control circuit mainly contains on-off mode and two kinds of method for position mutually, and on-off mode is cut off heater power source when temperature reaches controlling value, is lower than connection heater power source when controlling temperature, and temperature-controlled precision is poor, temperature fluctuation is big; The phase place mode is to trigger phase place according to silicon controlled in height control each cycle of interchange of temperature, and its temperature-controlled precision is higher, but can produce radionoise.
The utility model content
The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of workshop baking vanish voice thermostatically-controlled equipment is provided.
The utility model solves the technical scheme that its technical matters adopted: a kind of workshop baking vanish voice thermostatically-controlled equipment; Comprise bridge for measuring temperature circuit and voltage comparator circuit; The signal of said bridge for measuring temperature circuit collection transfers to triangular wave through differential amplifier circuit and forms circuit, and the output signal that triangular wave forms circuit is sent to well heater trigger circuit and voice alarm circuit through voltage comparator circuit.
The homophase silicon diode VD1 of said bridge for measuring temperature circuit employing two series connection, VD2 are as sensor.
Said differential amplifier circuit is made up of adjustable potentiometer and the resistance that operational amplifier A 2 and input end thereof connect, and its output terminal IC1 is connected to the comparer A4 inverting input of voltage comparator circuit.
Said triangular wave forms circuit and comprises amplifier A3 and external resistance thereof, and electric capacity, the output terminal of amplifier A3 are connected to the in-phase input end of comparer A4 of voltage comparator circuit as reference voltage through capacitor C 2.
The comparer A4 of said voltage comparator circuit is a pulse width modulator.
Said voice alarm circuit is made up of the language chip IC2, LM386 audio frequency power amplifier chip IC 3 and the loudspeaker Y that connect successively.
Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: this device is taked on-off mode and two kinds of advantages of method for position mutually; Promptly adopt the cycle switch control mode, the switch fixed cycle, through control open and close time recently control temperature; If spend time decreased higher then that well heater leaves, the time of pass increases; Otherwise the time of opening increases, the time decreased of pass, thus played the control action of temperature, owing to its cycle is merely about 30s, and the change of open and close time ratio is a progressive formation, so temperature-controlled precision is higher, temperature fluctuation is little.
Description of drawings
Fig. 1 is the circuit structure block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Like Fig. 1, shown in Figure 2; The workshop baking vanish voice thermostatically-controlled equipment of the utility model; Comprise bridge for measuring temperature circuit 1 and voltage comparator circuit 2; The signal that said bridge for measuring temperature circuit 1 is gathered transfers to triangular wave through differential amplifier circuit 11 and forms circuit 12, and the output signal that triangular wave forms circuit 12 is sent to well heater trigger circuit 21 and voice alarm circuit 22 through voltage comparator circuit 2.
The homophase silicon diode VD1 of said bridge for measuring temperature circuit 1 employing two series connection, VD2 are as sensor; The forward current one of silicone tube PN junction regularly; 1 ℃ of the every rising of temperature, its forward voltage drop drops to 2mV, and this linear sensor is better; Can be operated in-50 ℃～150 ℃ degree scopes, the amplifier A1 that silicon diode VD1, VD2 output terminal connect plays the buffering buffer action.
Said differential amplifier circuit 11 is made up of adjustable potentiometer and the resistance that operational amplifier A 2 and input end thereof connect; The control temperature is come regulation voltage signal through RP1; Its output terminal IC1 is connected to the comparer A4 inverting input of voltage comparator circuit 2; Triangular wave forms circuit 12 and comprises amplifier A3 and external resistance thereof, and electric capacity, the output terminal of amplifier A3 are connected to the in-phase input end of comparer A4 of voltage comparator circuit 2 as reference voltage through capacitor C 2; The comparer A4 of said voltage comparator circuit 2 is a pulse width modulator, and the pulse width of its output square wave receives the modulation of A point voltage.
When the workshop combined padding and drying system when energized heats; Temperature rises gradually; The forward voltage drop at temperature sensor VD1, VD2 two ends is along with temperature rises and linear decline; Through the voltage that rises by linearity that operational amplifier A 2 anti-phase A points output has been amplified, deliver to the inverting input of comparer A4 and the sawtooth voltage of in-phase input end again and compare.When the voltage of inverting input during less than in-phase input end voltage (triangle wave voltage), comparer A4 exports high level, makes controllable silicon VS triggering and conducting through resistance R 11 current limlitings, the well heater GST heating of switching on.When temperature was higher than setting value in the combined padding and drying system of workshop, the voltage of inverting input increased gradually, and the pulse width of the square wave of comparer A4 output reduces, and well heater also reduces conduction time thereupon, and temperature descends; Comparer A4 output low level, signal transfer to the 3rd pin of language chip IC2, and language chip IC2 obtains negative supply voltage; The 2nd pin of language chip IC2 output audio alert signal is coupled to the 3rd pin of LM386 audio frequency power amplifier chip IC 3 through capacitor C 4, after its internal audio frequency amplifies; Export through the 6th pin of LM386 audio frequency power amplifier chip IC 3 again; Capacitor C 5 couplings are amplified promotion loudspeaker Y and are sent audio alert, " temperature reduces ", prompting operation control personnel.
An above-described preferred embodiment that is merely the utility model can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.
Claims (6)
1. workshop baking vanish voice thermostatically-controlled equipment; It is characterized in that: comprise bridge for measuring temperature circuit (1) and voltage comparator circuit (2); The signal that said bridge for measuring temperature circuit (1) is gathered transfers to triangular wave through differential amplifier circuit (11) and forms circuit (12), and the output signal that triangular wave forms circuit (12) is sent to well heater trigger circuit (21) and voice alarm circuit (22) through voltage comparator circuit (2).
2. workshop according to claim 1 baking vanish voice thermostatically-controlled equipment is characterized in that: the homophase silicon diode VD1 of said bridge for measuring temperature circuit (1) employing two series connection, VD2 are as sensor.
3. workshop according to claim 1 baking vanish voice thermostatically-controlled equipment; It is characterized in that: said differential amplifier circuit (11) is made up of adjustable potentiometer and the resistance that operational amplifier A 2 and input end thereof connect, and its output terminal IC1 is connected to the comparer A4 inverting input of voltage comparator circuit (2).
4. workshop according to claim 1 baking vanish voice thermostatically-controlled equipment; It is characterized in that: said triangular wave forms circuit (12) and comprises amplifier A3 and external resistance thereof; Electric capacity, the output terminal of amplifier A3 are connected to the in-phase input end of comparer A4 of voltage comparator circuit (2) as reference voltage through capacitor C 2.
5. according to claim 1 or 4 described workshop baking vanish voice thermostatically-controlled equipments, it is characterized in that: the comparer A4 of said voltage comparator circuit (2) is a pulse width modulator.
6. workshop according to claim 1 baking vanish voice thermostatically-controlled equipment is characterized in that: said voice alarm circuit (22) is made up of the language chip IC2, LM386 audio frequency power amplifier chip IC 3 and the loudspeaker Y that connect successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200512294U CN202443343U (en) | 2012-02-17 | 2012-02-17 | Workshop stoving varnish voice constant temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200512294U CN202443343U (en) | 2012-02-17 | 2012-02-17 | Workshop stoving varnish voice constant temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202443343U true CN202443343U (en) | 2012-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200512294U Expired - Fee Related CN202443343U (en) | 2012-02-17 | 2012-02-17 | Workshop stoving varnish voice constant temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202443343U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412592A (en) * | 2013-07-26 | 2013-11-27 | 北京航天控制仪器研究所 | Three-level temperature control system of inertia measurement system |
| CN105652921A (en) * | 2015-11-13 | 2016-06-08 | 芜湖市恒峰科技有限公司 | Thermostatic control apparatus with self-protection and over-limit alarm |
-
2012
- 2012-02-17 CN CN2012200512294U patent/CN202443343U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412592A (en) * | 2013-07-26 | 2013-11-27 | 北京航天控制仪器研究所 | Three-level temperature control system of inertia measurement system |
| CN103412592B (en) * | 2013-07-26 | 2015-11-25 | 北京航天控制仪器研究所 | A kind of inertial measurement system three grades of temperature control systems |
| CN105652921A (en) * | 2015-11-13 | 2016-06-08 | 芜湖市恒峰科技有限公司 | Thermostatic control apparatus with self-protection and over-limit alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20130217 |