CN203705081U - Hybrid type temperature sampling circuit - Google Patents
Hybrid type temperature sampling circuit Download PDFInfo
- Publication number
- CN203705081U CN203705081U CN201320850691.5U CN201320850691U CN203705081U CN 203705081 U CN203705081 U CN 203705081U CN 201320850691 U CN201320850691 U CN 201320850691U CN 203705081 U CN203705081 U CN 203705081U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output terminal
- temperature
- splenium
- point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 50
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model provides a hybrid type temperature sampling circuit, which comprises a power supply Vcc, a reference voltage circuit, a sampling unit and an output circuit. The output circuit comprises an operational amplifier A. The forward output end of the operational amplifier A is connected with the output end of the reference voltage circuit and the output end of the sampling unit. The reverse output end of the operational amplifier A is connected with the output end thereof. The sampling unit comprises a resistor R1, a negative temperature coefficient (NTC) thermistor and a temperature relay K, wherein the resistor R1, the negative temperature coefficient (NTC) thermistor and the temperature relay K are connected electrically together. The sampling unit is serially connected between the power supply Vcc and a common terminal GND. According to the technical scheme of the utility model, two types of temperature sensors in the sampling unit are electrically connected and matched with each other. Therefore, by means of the single circuit, the detection signals of two types of temperature sensors can be processed at the same time. Meanwhile, the circuit structure is simplified and the cost is lowered.
Description
Technical field
The utility model relates to electronic technology field, refers to especially a kind of mixed type temperature sampling circuit.
Background technology
In existing various electronic application, application comparative maturity be that temperature sensor is joined with suitable overheat protector signal conditioning circuit etc., to realize temperature detection and protection.But the type kind of temperature sensor is various, useful resistance change own reflects the thermistor of temperature variation, and useful elastic sheet metal is realized and arrived the set point of temperature temperature relay of closed/disconnection automatically.In power electronic equipment system; some occasion adopts thermistor to carry out temperature detection (as IGBT), some occasion adopts temperature relay (as heating radiator overheat protector); how to adopt a circuit that two kinds of temperature protection component signals are unified to process, there is the significance in application simplification.
Utility model content
The purpose of this utility model is for the problems referred to above, and mixed type temperature sampling circuit is provided, and has realized same circuit and has processed two kinds of temperature sensor detection signals simultaneously, has simplified circuit, has reduced cost.
For achieving the above object, the mixed type temperature sampling circuit that the utility model provides, comprise power Vcc, reference voltage circuit, sampling unit and output circuit, described output circuit comprises amplifier A, the forward output terminal of described amplifier A connects the output terminal of reference voltage circuit and the output terminal of sampling unit, the inverse output terminal of described amplifier A is connected with its output terminal, wherein, described sampling unit is made up of resistance R 1, thermistor NTC and temperature relay K electrical connection, and described sampling unit is serially connected between power Vcc and public terminal GND.
Above-mentioned mixed type temperature sampling circuit, wherein, if thermistor NTC has positive temperature characterisitic, described temperature relay K and resistance R 1 are connected in parallel and become partial pressure unit, this partial pressure unit is connected with thermistor NTC, and the junction of partial pressure unit and the thermistor NTC output terminal that is sampling unit.
Above-mentioned mixed type temperature sampling circuit, wherein, if thermistor NTC has negative temperature characteristic, described temperature relay K and thermistor NTC are connected in parallel and become partial pressure unit, this partial pressure unit is connected with resistance R 1, and the junction of partial pressure unit and resistance R 1 output terminal that is sampling unit.
Above-mentioned mixed type temperature sampling circuit, wherein, described reference voltage circuit comprises first point of splenium and second point of splenium, described first point of splenium and second point of splenium are connected between power Vcc and public terminal GND after mutually connecting, and the junction of first point of splenium and the second point of splenium output terminal that is reference voltage circuit.
Above-mentioned mixed type temperature sampling circuit, wherein, described first point of splenium and second point of splenium are the resistance that resistance is equal, or are the diode of Opposite direction connection.
Above-mentioned mixed type temperature sampling circuit, wherein, is also connected capacitor C between the output terminal of described reference voltage circuit and public terminal GND.
Compared with prior art, the utility model has the advantage of: by two kinds of temperature sensors being electrically connected to cooperation in sampling unit, having realized same circuit and processed two kinds of temperature sensor detection signals simultaneously, simplified circuit structure, reduced cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is a kind of circuit connection diagram of sampling unit in the utility model Fig. 1;
Fig. 3 is the another kind of circuit connection diagram of sampling unit in the utility model Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
As shown in Figure 1, the mixed type temperature sampling circuit that the utility model provides, comprise power Vcc, reference voltage circuit 2, sampling unit 1 and output circuit 3, described output circuit 3 comprises amplifier A, the forward output terminal of described amplifier A connects the output terminal of reference voltage circuit 2 and the output terminal of sampling unit 1, the inverse output terminal of described amplifier A is connected with its output terminal, wherein, described sampling unit 1 is made up of resistance R 1, thermistor NTC and temperature relay K electrical connection, and described sampling unit 1 is serially connected between power Vcc and public terminal GND.Like this, by sampling unit 1, two kinds of temperature sensors (thermistor NTC and temperature relay K) being electrically connected to cooperation, realize same circuit and processed two kinds of temperature sensor detection signals simultaneously, simplified circuit structure, reduced cost.
As shown in Figure 1, for providing the reference voltage circuit 2 of reference voltage signal, whole circuit comprises first point of splenium 21 and second point of splenium 22, described first point of splenium 21 and second point of splenium 22 are connected between power Vcc and public terminal GND after series connection mutually, and the junction of first point of splenium 21 and second point of splenium 22 is the output terminal of reference voltage circuit 2.In practical application, first point of splenium 21 and second point of splenium 22 can be the resistance that resistance is equal, or are the diode of Opposite direction connection.
As shown in Figure 2, if thermistor NTC has positive temperature characterisitic, described temperature relay K(open type) be connected in parallel and become partial pressure unit 11 with resistance R 1, this partial pressure unit 11 is connected with thermistor NTC, and partial pressure unit 11 is the output terminal of sampling unit 1 with the junction of thermistor NTC.In practical application, partial pressure unit 11 can be exchanged with the position of thermistor NTC, does not affect circuit function.In the time that the closed threshold value of temperature relay K is arrived in temperature rise, temperature relay K closure, resistance R 1 is by short circuit, and whole voltages of power Vcc are all added in thermistor NTC two ends.If partial pressure unit 11 is the position shown in Fig. 2 with the position of thermistor NTC, the instantaneous power Vcc amplitude that increases to of output terminal (dividing potential drop of thermistor NTC) of sampling unit 1; If the location swap of partial pressure unit 11 and thermistor NTC in Fig. 2, the output terminal (dividing potential drop of resistance R 1) of sampling unit 1 is instantaneous is reduced to zero; Thereby reflect temperature and reached the closed threshold value of temperature relay K, for back-end circuit provides temperature signal.
As shown in Figure 3, if thermistor NTC has negative temperature characteristic, described temperature relay K(open type) be connected in parallel and become partial pressure unit 11 with thermistor NTC, this partial pressure unit is connected with resistance R 1, and partial pressure unit 11 is the output terminal of sampling unit 1 with the junction of resistance R 1.In practical application, partial pressure unit 11 can be exchanged with the position of resistance R 1, does not affect circuit function.In the time that the closed threshold value of temperature relay K is arrived in temperature rise, temperature relay K closure, thermistor NTC is by short circuit, and whole voltages of power Vcc are all added in resistance R 1 two ends.If partial pressure unit 11 is the position shown in Fig. 2 with the position of resistance R 1, the output terminal (dividing potential drop of thermistor NTC) of sampling unit 1 is instantaneous is reduced to zero; If the location swap of partial pressure unit 11 and thermistor NTC in Fig. 2, the instantaneous power Vcc amplitude that increases to of output terminal (dividing potential drop of resistance R 1) of sampling unit 1; Thereby reflect temperature and reached the closed threshold value of temperature relay K, for back-end circuit provides temperature signal.
When practical application, between the output terminal of reference voltage circuit 2 (positive input of amplifier A) and public terminal GND, can also be connected capacitor C, play the effect of filtering voltage regulation, power Vcc is the direct supply of magnitude of voltage 15V.
Compared with prior art, the utility model, by two kinds of temperature sensors being electrically connected to cooperation in sampling unit, having been realized same circuit and has been processed two kinds of temperature sensor detection signals simultaneously, has simplified circuit structure, has reduced cost.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a mixed type temperature sampling circuit, comprise power Vcc, reference voltage circuit, sampling unit and output circuit, described output circuit comprises amplifier A, the forward output terminal of described amplifier A connects the output terminal of reference voltage circuit and the output terminal of sampling unit, the inverse output terminal of described amplifier A is connected with its output terminal, it is characterized in that, described sampling unit is made up of resistance R 1, thermistor NTC and temperature relay K electrical connection, and described sampling unit is serially connected between power Vcc and public terminal GND.
2. mixed type temperature sampling circuit according to claim 1, it is characterized in that, if thermistor NTC has positive temperature characterisitic, described temperature relay K and resistance R 1 are connected in parallel and become partial pressure unit, this partial pressure unit is connected with thermistor NTC, and the junction of partial pressure unit and the thermistor NTC output terminal that is sampling unit.
3. mixed type temperature sampling circuit according to claim 1, it is characterized in that, if thermistor NTC has negative temperature characteristic, described temperature relay K and thermistor NTC are connected in parallel and become partial pressure unit, this partial pressure unit is connected with resistance R 1, and the junction of partial pressure unit and resistance R 1 output terminal that is sampling unit.
4. mixed type temperature sampling circuit according to claim 1, it is characterized in that, described reference voltage circuit comprises first point of splenium and second point of splenium, described first point of splenium and second point of splenium are connected between power Vcc and public terminal GND after mutually connecting, and the junction of first point of splenium and the second point of splenium output terminal that is reference voltage circuit.
5. mixed type temperature sampling circuit according to claim 4, is characterized in that, described first point of splenium and second point of splenium are the resistance that resistance is equal, or are the diode of Opposite direction connection.
6. according to the mixed type temperature sampling circuit described in claim 4 or 5, it is characterized in that, between the output terminal of described reference voltage circuit and public terminal GND, be also connected capacitor C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850691.5U CN203705081U (en) | 2013-12-20 | 2013-12-20 | Hybrid type temperature sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850691.5U CN203705081U (en) | 2013-12-20 | 2013-12-20 | Hybrid type temperature sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705081U true CN203705081U (en) | 2014-07-09 |
Family
ID=51055503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320850691.5U Expired - Lifetime CN203705081U (en) | 2013-12-20 | 2013-12-20 | Hybrid type temperature sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705081U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054683A (en) * | 2019-06-06 | 2020-12-08 | 三菱电机株式会社 | Power conversion device |
-
2013
- 2013-12-20 CN CN201320850691.5U patent/CN203705081U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054683A (en) * | 2019-06-06 | 2020-12-08 | 三菱电机株式会社 | Power conversion device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204188702U (en) | A kind of current detection circuit | |
| CN204349432U (en) | A kind of Switching Power Supply thermal-shutdown circuit | |
| CN103675596B (en) | A kind of break detection circuit and temperature collection circuit | |
| CN204347169U (en) | A kind of break detection circuit and temperature collection circuit | |
| CN102444603A (en) | Fan control circuit | |
| CN105553453B (en) | A kind of automatically controlled temperature switch circuit | |
| CN203705081U (en) | Hybrid type temperature sampling circuit | |
| CN203772888U (en) | Device used for acquiring detection signals of two-wire Hall sensor | |
| CN103424598B (en) | Inversion system output voltage detecting circuit and inversion system | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN203747788U (en) | RS485 circuit with a polarity-detecting function | |
| CN202083932U (en) | Multipath digital quantity input circuit based on Darlington transistor array | |
| CN104369688A (en) | Potential-PWM regulating circuit and automotive lamp with same | |
| CN204595635U (en) | Temperature-control circuit in DC converter used for electric vehicle | |
| CN203706007U (en) | Ethernet switch voltage stabilizing circuit | |
| CN203705513U (en) | Hall sensor output signal processing circuit | |
| CN203707767U (en) | Interface protection circuit of current sensor, control circuit and electric appliance | |
| CN205005035U (en) | Can realize that high level arrives low level conversion's output interface circuit | |
| CN204279212U (en) | A kind of current potential-PWM regulating circuit and apply the automobile lamp of this regulating circuit | |
| CN205490462U (en) | Automatically controlled temperature detect switch circuit | |
| CN105486423A (en) | Real-time detection circuit for NTC high temperature in multipath IGBT | |
| CN203588094U (en) | Simulation temperature control circuit | |
| CN203204337U (en) | Air conditioner control circuit suitable for automobile | |
| CN109117682A (en) | A kind of integrating circuit | |
| CN201876496U (en) | Phase detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |