CN203086755U - Automatic temperature measuring and heating door machine - Google Patents
Automatic temperature measuring and heating door machine Download PDFInfo
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- CN203086755U CN203086755U CN 201220744591 CN201220744591U CN203086755U CN 203086755 U CN203086755 U CN 203086755U CN 201220744591 CN201220744591 CN 201220744591 CN 201220744591 U CN201220744591 U CN 201220744591U CN 203086755 U CN203086755 U CN 203086755U
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Abstract
The utility model relates to an automatic temperature measuring and heating door machine which comprises a door machine and an automatic temperature measuring and heating module. The machine is characterized in that the automatic temperature measuring and heating module comprises a power supply circuit, a temperature detection circuit, a comparator circuit and a heating circuit, the power circuit supplies power to the temperature detection circuit, the comparator circuit and the heating circuit, the temperature detection circuit generates different voltage input in different temperatures and outputs the voltage input to the comparator circuit for comparison, and the comparator circuit controls the opening or closing of the heating circuit. The utility model provides a low-cost simple and practical technical scheme of the automatic temperature measuring and heating of equipment, a requirement of the working of building conversational system equipment at an extremely low temperature environment can be satisfied, and the automatic temperature measuring and heating door machine is applied in the production well.
Description
Technical field
The utility model relates to building conversational system, particularly a kind of automatic temperature measurement heating ladder-port machine that can be applicable to building conversational system.
Background technology
The electrical outdoor subset of existing various building conversational systems, in order to adapt to the requirement of low temperature environment (as: 40 ° of C) work, need select the very wide electronic devices and components of low-temperature working scope during design for use, this has increased the difficulty that device is selected undoubtedly, also makes the cost of complete machine significantly increase.
In addition in the reality, some producer designs the low-temperature working requirement of initially not considering product at old product, or can't test at the low-temperature working environment of product because of the experiment condition restriction, causes when reality is used, equipment can not cause massive losses in operate as normal under the microthermal climate.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of low cost, simple and practical to equipment automatic temperature measurement heating technique scheme, can satisfy the requirement that building conversational system equipment is worked under utmost point low temperature environment, is well used aborning.
The utility model is achieved in that a kind of automatic temperature measurement heating ladder-port machine, comprise ladder-port machine and automatic temperature measurement heating module, it is characterized in that: described automatic temperature measurement heating module comprises power circuit, temperature sensing circuit, comparator circuit and heater circuit, described power circuit is respectively temperature sensing circuit, comparator circuit and heater circuit power supply, described temperature sensing circuit inputs to after comparator circuit compares producing different voltage under the different temperature, is controlled by comparator circuit and opens or closes heater circuit.
Described power circuit adopts the LM7805 circuit to produce the stabilized voltage power supply of 5V.
After described temperature sensing circuit partly adopts negative temperature coefficient transducer NTC and resistance R 1 is connected, be connected to power circuit and comparator circuit more respectively, wherein negative temperature coefficient transducer NTC is used to come the checkout equipment temperature, low more its resistance value of ambient temperature is high more, and resistance R 1 is used to regulate the temperature that changes the startup heating.
Described comparator circuit comprises precision resistance R4, R5 and LM358 circuit, described precision resistance R4, R5 produce the 2.5V voltage reference voltage of device circuit as a comparison with the supply power voltage dividing potential drop of power circuit, temperature sensing circuit will input to after the LM358 circuit compares producing different voltage under the different temperature, opens or closes heater circuit by the control of LM358 circuit.
Described heater circuit comprises triode Q2, high-power MOS tube and cement resistor RT1, controls cement resistor RT1 to realize heating by high-power MOS tube.
Advantage of the present utility model is: by a kind of simple scheme, realized the module of equipment automatic heating function, be installed in the equipment, the normal use of assurance equipment under the extremely low temperature environment; Can be used for transforming used equipment by this conceptual design automatic temperature measurement heating module, or in new equipment, add this module, simplified design, and can save a large amount of costs.
Description of drawings
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the structured flowchart of the automatic temperature measurement heating module of automatic temperature measurement heating ladder-port machine described in the utility model.
Fig. 2 is the circuit connection diagram of described automatic temperature measurement heating module.
Embodiment
A kind of automatic temperature measurement heating ladder-port machine, comprise ladder-port machine and automatic temperature measurement heating module, see also Fig. 1, described automatic temperature measurement heating module comprises power circuit, temperature sensing circuit, comparator circuit and heater circuit, described power circuit is respectively temperature sensing circuit, comparator circuit and heater circuit power supply, described temperature sensing circuit inputs to after comparator circuit compares producing different voltage under the different temperature, is controlled by comparator circuit and opens or closes heater circuit.
Seeing also Fig. 2, is the circuit connection diagram of described automatic temperature measurement heating module.Wherein said power circuit adopts the LM7805 circuit to produce the stabilized voltage power supply of 5V, after described temperature sensing circuit partly adopts negative temperature coefficient transducer NTC and C1 to be in parallel, again with after resistance R 1 is connected, be connected to power circuit and comparator circuit respectively, wherein temperature sensing circuit partly adopts negative temperature coefficient transducer (NTC) to come the checkout equipment temperature, the characteristic of NTC is that temperature is low more, resistance value is high more, selecting model is the NTC of HJ-NTC-G12, described negative temperature coefficient sensor temperature-resistance characteristic sees Table 1, and resistance R 1 is used to regulate the temperature that changes the startup heating.
Table 1:NTC temperature sensor HJ-NTC-G12 temperature-resistance property list:
| Temperature ° C | Resistance (K Ω) | Temperature ° C | Resistance (K Ω) |
| -40 | 164.25 | -10 | 35.887 |
| -35 | 127.66 | -5 | 32.180 |
| -30 | 99.893 | 0 | 26.108 |
| -25 | 78.674 | 10 | 17.570 |
| -20 | 62.354 | 25 | 10.000 |
Described comparator circuit comprises precision resistance R4, R5, LM358 circuit and resistance R 2, R3 and R6, described precision resistance R4, R5 produce the 2.5V voltage reference voltage of device as a comparison with the supply power voltage dividing potential drop of power circuit, temperature sensing circuit is inputed to after the LM358 circuit compares producing different voltage under the different temperature, and control opens or closes heater circuit; The hysteresis comparator that described comparator circuit adopts LM358 to form adopts hysteresis comparator can avoid the frequent problem of switching when critical temperature.
Described heater circuit comprises triode Q2, resistance R 7-R10, high-power MOS tube and cement resistor RT1, controls cement resistor to realize heating by high-power MOS tube.
The operation principle of this automatic temperature measurement heating module is as follows: when ladder-port machine device interior temperature is lower than design temperature, the NTC resistance of sensor becomes the big set point that surpasses, the voltage that is input to the comparator positive pole exceeds reference voltage, the comparator circuit action, output becomes " height ", open the heater circuit of rear end, start heating equipment; Along with ladder-port machine device interior temperature rises, the NTC resistance reduces gradually, the voltage that is input to the comparator positive pole is lower than reference voltage, the comparator upset returns to " low " and (is determined by the hysteresis comparator characteristic, internal temperature during recovery is higher than the temperature of action, the temperature difference of the two is by resistance R 2, R3 and R6 decision), close the rear end heater circuit; Simultaneously, also can change the temperature that starts heating by changing resistance R 1, the general scope of setting can be between 0 ° of C ~ 40 ° C.
Claims (5)
1. an automatic temperature measurement heats ladder-port machine, comprise ladder-port machine and automatic temperature measurement heating module, it is characterized in that: described automatic temperature measurement heating module comprises power circuit, temperature sensing circuit, comparator circuit and heater circuit, described power circuit is respectively temperature sensing circuit, comparator circuit and heater circuit power supply, described temperature sensing circuit inputs to after comparator circuit compares producing different voltage under the different temperature, is controlled by comparator circuit and opens or closes heater circuit.
2. according to the described automatic temperature measurement heating of claim 1 ladder-port machine, it is characterized in that: described power circuit adopts the LM7805 circuit to produce the stabilized voltage power supply of 5V.
3. according to the described automatic temperature measurement heating of claim 1 ladder-port machine, it is characterized in that: after described temperature sensing circuit partly adopts negative temperature coefficient transducer NTC and resistance R 1 is connected, be connected to power circuit and comparator circuit more respectively, wherein negative temperature coefficient transducer NTC is used to come the checkout equipment temperature, low more its resistance value of ambient temperature is high more, and resistance R 1 is used to regulate the temperature that changes the startup heating.
4. according to the described automatic temperature measurement heating of claim 1 ladder-port machine, it is characterized in that: described comparator circuit comprises precision resistance R4, R5 and LM358 circuit, described precision resistance R4, R5 produce the 2.5V voltage reference voltage of device circuit as a comparison with the supply power voltage dividing potential drop of power circuit, temperature sensing circuit will input to after the LM358 circuit compares producing different voltage under the different temperature, opens or closes heater circuit by the control of LM358 circuit.
5. according to the described automatic temperature measurement heating of claim 1 ladder-port machine, it is characterized in that: described heater circuit comprises triode Q2, high-power MOS tube and cement resistor RT1, and this heater circuit is controlled cement resistor RT1 to realize heating by high-power MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220744591 CN203086755U (en) | 2012-12-29 | 2012-12-29 | Automatic temperature measuring and heating door machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220744591 CN203086755U (en) | 2012-12-29 | 2012-12-29 | Automatic temperature measuring and heating door machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203086755U true CN203086755U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220744591 Expired - Fee Related CN203086755U (en) | 2012-12-29 | 2012-12-29 | Automatic temperature measuring and heating door machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN203086755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079295A (en) * | 2012-12-29 | 2013-05-01 | 冠林电子有限公司 | Ladder way machine capable of automatically measuring temperature and heating |
-
2012
- 2012-12-29 CN CN 201220744591 patent/CN203086755U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079295A (en) * | 2012-12-29 | 2013-05-01 | 冠林电子有限公司 | Ladder way machine capable of automatically measuring temperature and heating |
| CN103079295B (en) * | 2012-12-29 | 2015-12-09 | 冠林电子有限公司 | Automatic temperature measurement heating ladder-port machine |
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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: 20130724 Termination date: 20131229 |