CN201804289U - Duplex temperature detection and protection device - Google Patents
Duplex temperature detection and protection device Download PDFInfo
- Publication number
- CN201804289U CN201804289U CN200920198325XU CN200920198325U CN201804289U CN 201804289 U CN201804289 U CN 201804289U CN 200920198325X U CN200920198325X U CN 200920198325XU CN 200920198325 U CN200920198325 U CN 200920198325U CN 201804289 U CN201804289 U CN 201804289U
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- chip microcomputer
- sensing probe
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Abstract
The utility model relates to a duplex temperature detection and protection device which comprises a temperature adjusting circuit and a temperature limiting circuit. The protection circuit provided by the utility model is based on duplex detection of temperature-adjusting and temperature-limiting; and the mutual compensation of the two circuits is achieved. Temperature detected by the two circuits is reflected to a single-chip microcomputer to control a heating body. The device has simple structure, low cost and duplex protection function, reduces the requirement for peripheral equipment, is easy to debug, and has high reliability.
Description
Technical field
The utility model relates to heating-up temperature induction of a kind of pond and temperature protective device, belongs to pond heating-up temperature protective device technical field.
Background technology
At present, a lot of ponds heating controller, in to pond heating process, only with a temperature sensing device temperature-sensitive, too high or the water temperature of local temperature can occur and not reach the temperature of expectation with regard to escape, this is because survey different places, temperature is certain to change, will be from the coolant-temperature gage that calandria is nearer than higher, and will be low from the distant temperature of calandria, if temperature detector is placed on from the closer place of calandria, can occur then that temperature does not reach setting value in the pond, and temperature detector has been sensed higher temperature, and automatic escape.If can occur that the calandria environment temperature is too high to work the mischief to calandria and be placed on to have from calandria place far away.So only can cause temperature to differ greatly, not reach desired temperature protection purpose with a temperature sensing device temperature-sensitive.
The utility model content
In order to overcome above-mentioned shortcoming, the utility model aims to provide and a kind ofly utilizes two temperature sensing circuits respectively different local temperature to be detected, and detect the error of setting value and actual detected value, thereby come control heater spare whether to continue to heat by single-chip microcomputer.
For solving the problems of the technologies described above, the utility model is realized as follows: dual-temperature holding circuit described in the utility model is made up of thermoregulation circuit and limit circuit temperature two parts.At first set the temperature single-chip microcomputer that needs and read design temperature automatically, limit circuit temperature limit temperature, the thermoregulation circuit temperature sensor, the temperature that two groups of circuit inductance are come out informs single-chip microcomputer by circuit and controls calandria and whether heat.Thermoregulation circuit is connected to form by resistance R 1, R2, capacitor C 1, temperature-sensing probe NTC1 and single-chip microcomputer, and the R2 divider resistance connects temperature-sensing probe again, inserts the I/O mouth of single-chip microcomputer simultaneously through R1, C1 filtering.The limit circuit temperature can be measured ambient temperature, and the reading of measuring according to the limit circuit temperature compensates water temperature again.The limit circuit temperature is connected to form by resistance R 3, R4, capacitor C 2, temperature-sensing probe NTC2 and single-chip microcomputer, and the R4 divider resistance connects temperature-sensing probe, is linked into the I/O mouth of single-chip microcomputer simultaneously through R3, C2 filtering.When water temperature changed, the resistance of the electricity group of temperature-sensing probe also can be along with the variation of coolant-temperature gage, and the magnitude of voltage that is sent to the I/O mouth also can change.Signal according to change in voltage is controlled calandria.
Described thermoregulation circuit is connected to form by resistance R 1, R2, capacitor C 1, temperature-sensing probe NTC1 and single-chip microcomputer, the voltage input of resistance R 2 one termination 5V, the other end links to each other with resistance R 1 with temperature-sensing probe, inserts the I/O mouth of single-chip microcomputer after R1 and the filtering of C1 composition filtering circuit.When water temperature changed, the resistance of the resistance of temperature-sensing probe also can be along with variation, and the magnitude of voltage that is sent to the I/O mouth also can change.
Described limit circuit temperature is connected to form by resistance R 3, R4, capacitor C 2, temperature-sensing probe NTC2 and single-chip microcomputer, resistance R 4 one termination voltage input ends, and the other end links to each other with resistance R 3 with temperature-sensing probe, inserts the port of single-chip microcomputer after R3 and the C2 filtering.
Good effect of the present utility model is: the utility model is simple in structure, with low cost, duplicate protection, and is less demanding to peripheral components, and debugging easily; be suitable for all temps control circuit; the reliability height carries out temperature compensation by the two-way temperature-sensitive, can reach accurate measurement effect.
Description of drawings
Fig. 1 is the thermoregulation circuit of the utility model double protecting device.
Fig. 2 is the limit circuit temperature of the utility model double protecting device.
Embodiment
With reference to Fig. 1, Fig. 2, the layout of the utility model double temperature induction protective device circuit comprises thermoregulation circuit and limit circuit temperature.
As shown in Figure 1, the thermoregulation circuit embodiment is: receive first divider resistance 2 from the 5V voltage stabilizing mouth 1 of power supply, first divider resistance 2 meets temperature-sensing probe NTC13 again, insert an I/O mouth 5 of single-chip microcomputer simultaneously through RC filtering 4, another pin ground connection of temperature-sensing probe NTC13, when water temperature on every side changes, the resistance of temperature-sensing probe NTC13 also can be along with water temperature changes, the magnitude of voltage that is sent to an I/O mouth 5 also can change, and temperature-sensing probe NTC13 measures different temperature, the program the inside is controlled calandria again according to the temperature of the different water that measure.
As shown in Figure 2, connect second divider resistance 6 from the 5V voltage stabilizing mouth 1 of power supply, second divider resistance 6 meets temperature-sensing probe NTC28 again to ground, inserts the 2nd I/O mouth 9 of single-chip microcomputer simultaneously through RC filtering 27, and the magnitude of voltage that is sent to the 2nd I/O mouth 9 when water temperature changes also can change.Single-chip microcomputer compares the magnitude of voltage of thermoregulation circuit and the measurement of limit circuit temperature, both compensate mutually temperature, whether allow calandria continue heating according to setting value control again, so just can avoid occurring that the local temperature height works the mischief to device or water temperature does not reach the temperature of requirement and stop heating.
The NTC type thermistor that described temperature-sensing probe NTC13 is 50K.
Claims (2)
1. the double temperature induction protective device is made up of thermoregulation circuit and limit circuit temperature; It is characterized in that thermoregulation circuit is connected to form by resistance R 1, R2, capacitor C 1, temperature-sensing probe NTC1 and single-chip microcomputer, the voltage input of resistance R 2 one termination 5V, the other end links to each other with resistance R 1 with temperature-sensing probe, inserts the I/O mouth of single-chip microcomputer after R1 and the filtering of C1 composition filtering circuit; The limit circuit temperature is connected to form by resistance R 3, R4, capacitor C 2, temperature-sensing probe NTC2 and single-chip microcomputer, resistance R 4 one termination voltage input ends, and the other end links to each other with resistance R 3 with temperature-sensing probe, inserts the port of single-chip microcomputer after R3 and the C2 filtering.
2. double temperature induction protective device according to claim 1 is characterized in that: described temperature-sensing probe is the NTC type thermistor of 50K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920198325XU CN201804289U (en) | 2009-10-15 | 2009-10-15 | Duplex temperature detection and protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920198325XU CN201804289U (en) | 2009-10-15 | 2009-10-15 | Duplex temperature detection and protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201804289U true CN201804289U (en) | 2011-04-20 |
Family
ID=43873791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920198325XU Expired - Lifetime CN201804289U (en) | 2009-10-15 | 2009-10-15 | Duplex temperature detection and protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201804289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278258A (en) * | 2011-11-21 | 2013-09-04 | 现代摩比斯株式会社 | Drive motor inverter for vehicle |
-
2009
- 2009-10-15 CN CN200920198325XU patent/CN201804289U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278258A (en) * | 2011-11-21 | 2013-09-04 | 现代摩比斯株式会社 | Drive motor inverter for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110420 |