CN104330187B - A kind of system for detecting temperature of achievable battery saving mode - Google Patents
A kind of system for detecting temperature of achievable battery saving mode Download PDFInfo
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- CN104330187B CN104330187B CN201410613997.8A CN201410613997A CN104330187B CN 104330187 B CN104330187 B CN 104330187B CN 201410613997 A CN201410613997 A CN 201410613997A CN 104330187 B CN104330187 B CN 104330187B
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- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000007689 inspection Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 12
- 238000013461 design Methods 0.000 description 9
- MKGHDZIEKZPBCZ-ULQPCXBYSA-N methyl (2s,3s,4r,5r,6r)-4,5,6-trihydroxy-3-methoxyoxane-2-carboxylate Chemical compound CO[C@H]1[C@H](O)[C@@H](O)[C@H](O)O[C@@H]1C(=O)OC MKGHDZIEKZPBCZ-ULQPCXBYSA-N 0.000 description 9
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Abstract
The invention discloses a kind of system for detecting temperature of achievable battery saving mode, including the temperature sensing circuit for detecting environment temperature, temperature sensing circuit connects promising temperature sensing circuit and provides the power supply circuit of operating voltage and the output circuit for output temperature testing result；Outputs level signals from the power supply circuit to temperature sensing circuit discontinuity, in power supply circuit to during temperature sensing circuit outputs level signals, output circuit detection temperature signal and output temperature testing result.Beneficial effects of the present invention are：The present invention in order to realize save temperature sensing circuit power consumption purpose, do not use in the prior art using dc source directly for the mode of detection circuit power supply, but when needing detection temperature directly to detection circuit input high level or in sequential using discontinuous level altogether to, the power consumption of temperature sensing circuit is saved, improves the usage time of battery single charge.
Description
Technical field
The invention belongs to electronic circuit technology field, is related to a kind of temperature sensing circuit, specifically, be related to one kind can
Realize the system for detecting temperature of battery saving mode.
Background technology
The circuit of simple temperature detection is by thermistor and fixed resistance value resistant series mostly at present, is then tested
The branch pressure voltage of the two resistance, draws the resistance of the thermistor under Current Temperatures, and current temperature value is drawn by tabling look-up, this
Kind resistance is all the termination power of two series resistance one, and the other end is grounded.In order to detect the change of resistance value in thermistor, it is necessary to
Heat sensitive resistance provides electric power, for battery-powered product due to having strict demand to product power consumption, as this mode meeting
No matter cause in measurement temperature or non-measurement temperature, electric current presence always can produce the consumption of power supply, reduce battery and once fill
The usage time of full electricity.
The content of the invention
The present invention proposes a kind of circuit design for temperature detection based on button multiplexing technology, and design is simple, saves
Unnecessary kwh loss.
In order to solve the above technical problems, the present invention is achieved using following technical scheme：
A kind of system for detecting temperature of achievable battery saving mode, including for detecting the temperature sensing circuit of environment temperature,
Temperature sensing circuit connects promising temperature sensing circuit and provides the power supply circuit of operating voltage and for output temperature testing result
Output circuit；The power supply circuit is examined to the outputs level signals of temperature sensing circuit discontinuity in power supply circuit to temperature
During slowdown monitoring circuit outputs level signals, temperature sensing circuit detection environment temperature, output circuit detects according to temperature sensing circuit
Temperature signal and output temperature testing result.
Preferably, the system for detecting temperature of above-mentioned achievable battery saving mode, the temperature sensing circuit include thermistor,
Fixed value resistance；One end of the thermistor is power input, connects power supply circuit, and the other end is grounded by fixed value resistance；
The junction of thermistor and fixed value resistance is arranged to voltage detecting end, and voltage detecting end connects output circuit and passes through electric capacity
Ground connection.
Preferably, the system for detecting temperature of above-mentioned achievable battery saving mode, the power supply circuit are square-wave generator, square wave
The power end of generator is connected with voltage-stabilized power supply, and output end connects the power input of temperature sensing circuit.
In the case where power supply circuit is square-wave generator, the selection of output circuit has two kinds of situations：
The first situation is selected for output circuit and is made up of N number of operational amplifier, N+1 resistance and N number of light emitting diode
Rough estimation circuit (N be integer) more than 1, wherein connecting temperature inspection after the in-phase input end parallel connection of N number of operational amplifier
The voltage detecting end of slowdown monitoring circuit；It is series circuit between N+1 resistance, and voltage-stabilized power supply is accessed in one end of series circuit, separately
One end be grounded, two-by-two at the tie point of adjacent resistor concatenation operation amplifier inverting input；The operational amplifier it is defeated
Go out end to be grounded by light emitting diode.The resistance and quantity of the resistance can be adjusted according to actual conditions.
It is accurate measuring circuit that main part forms that second of situation, which is that output circuit selected by MCU, MCU TEMP_DEP_
CTR ends connect the power input of temperature sensing circuit, the voltage detecting of MCU TEMP_DET ends connection temperature sensing circuit
End.
Preferably, the system for detecting temperature of above-mentioned achievable battery saving mode, power supply circuit MCU, MCU controllable level are defeated
Go out the power input of end connection temperature sensing circuit.
In the case where power supply circuit is MCU, the selection of output circuit also has two kinds of situations：
The first situation is selected for output circuit and is made up of N number of operational amplifier, N+1 resistance and N number of light emitting diode
Rough estimation circuit (N be integer) more than 1, wherein connecting temperature inspection after the in-phase input end parallel connection of N number of operational amplifier
The voltage detecting end of slowdown monitoring circuit；It is series circuit between N+1 resistance, and voltage-stabilized power supply is accessed in one end of series circuit, separately
One end be grounded, two-by-two at the tie point of adjacent resistor concatenation operation amplifier inverting input；The operational amplifier it is defeated
Go out end to be grounded by light emitting diode.The resistance and quantity of the resistance can be adjusted according to actual conditions.
It is accurate measuring circuit that main part forms that second of situation, which is that output circuit selected by MCU, MCU TEMP_DEP_
CTR ends connect the power input of temperature sensing circuit, the voltage detecting of MCU TEMP_DET ends connection temperature sensing circuit
End.
Preferably, the system for detecting temperature of above-mentioned achievable battery saving mode, when the square-wave generator includes a NE555
Base integrated circuit, the power input of the output end connection temperature sensing circuit of NE555 time-base integrated circuits, basis set during NE555
Reset terminal into circuit connects voltage-stabilized power supply.
Beneficial effects of the present invention are：The present invention does not adopt to realize the purpose for the power consumption for saving temperature sensing circuit
The mode directly powered with dc source is utilized in the prior art for detection circuit, but when needing detection temperature directly to inspection
Slowdown monitoring circuit input high level is given altogether in sequential using the level of discontinuous, saves the power consumption of temperature sensing circuit,
The usage time of battery single charge is improved, the quantity and resistance of this external resistance can be adjusted according to actual conditions, can
Suitable for different temperature ranges so that its application is more extensive.
Brief description of the drawings
Fig. 1 is the connection electricity of the temperature sensing circuit of the system for detecting temperature of achievable battery saving mode proposed by the invention
Road schematic diagram；
Fig. 2 is that the connection circuit of the embodiment 1 of the system for detecting temperature of achievable battery saving mode proposed by the invention shows
It is intended to；
Fig. 3 is the voltage-stabilized power supply electricity of the embodiment 1 of the system for detecting temperature of achievable battery saving mode proposed by the invention
Road schematic diagram；
Fig. 4 be the system for detecting temperature of achievable battery saving mode proposed by the invention embodiment 2 in temperature detection electricity
The connection circuit diagram on road；
Fig. 5 be the system for detecting temperature of achievable battery saving mode proposed by the invention embodiment 2 in power supply circuit and
The connection circuit diagram of output circuit；
Fig. 6 is that the connection circuit of the embodiment 3 of the system for detecting temperature of achievable battery saving mode proposed by the invention shows
It is intended to；
Fig. 7 is that the connection circuit of the embodiment 4 of the system for detecting temperature of achievable battery saving mode proposed by the invention shows
It is intended to；
Fig. 8 be the system for detecting temperature of achievable battery saving mode proposed by the invention embodiment 1 and 4 in output circuit
The temperature range table of output result.
Embodiment
The embodiment of the present invention is described in more detail below in conjunction with the accompanying drawings.
The present invention saves the power consumption of temperature sensing circuit in order to realize, does not use straight using dc source in the prior art
The mode of detection circuit power supply is connected in, but when needing detection temperature directly to detection circuit input high level or in sequential
On given altogether using the level of discontinuous, save the power consumption of temperature sensing circuit, improve service time of battery.
To realize above-mentioned purpose of design, the present invention is in the structure design of temperature sensing circuit, it is necessary to for above-mentioned brand-new
Detection circuit power supply mode design a kind of system for detecting temperature of the achievable battery saving mode of brand new, to save electricity
While realize reliable temperature detecting function.
The circuit design of the present invention includes being used for the temperature sensing circuit for detecting environment temperature, and temperature sensing circuit is connected with
The power supply circuit of operating voltage and output circuit for output temperature testing result are provided for temperature sensing circuit；The power supply
Outputs level signals from circuit to temperature sensing circuit discontinuity, in power supply circuit to the temperature sensing circuit outputs level signals phase
Between, temperature sensing circuit detection environment temperature, the temperature signal output temperature that output circuit detects according to temperature sensing circuit is examined
Survey result.
As shown in figure 1, temperature sensing circuit includes thermistor RT1, fixed value resistance R1, power input and voltage detecting
End；One end of the thermistor RT1 is power input, connects power supply circuit, and the other end is grounded by fixed value resistance R1；Electricity
Pressure test side is arranged at thermistor RT1 and fixed value resistance R1 junction, and voltage detecting end connects output circuit and passed through
Electric capacity C1 is grounded.
When variation of ambient temperature, thermistor RT1 resistance can produce change, fixed value resistance with the change of temperature
R1 is series resistance, and the resistance provides a fixed resistance, by the fixed resistance value and temperature-sensitive that compare this fixed value resistance R1
Ratio between resistance RT1 change resistance judges the thermistor RT1 actual resistance under this state of temperature.Work as temperature-sensitive
During resistance RT1 change in resistance, thermistor RT1 and fixed value resistance R1 partial pressure value can also produce change, at voltage detecting end
Detect its partial pressure value, it can be deduced that now RT1 actual resistance, it is complete so as to draw ambient temperature value that now RT1 is detected
Into the process of whole temperature detection.
In the design of the present invention, the selection of power supply circuit and output circuit can have a variety of situations to combine, with reference to
Specific embodiment is further detailed.
Embodiment 1：
As shown in Fig. 2 in this embodiment, power supply circuit is square-wave generator, when square-wave generator is with NE555 (U4)
Base integrated circuit is the circuit design of main circuit.Wherein, NE555 (U4) power end (No. 4 terminals) be connected with by C3, C4, C5,
The voltage-stabilized power supply (as shown in Figure 3) of C6, U1, L1, R2 and R3 composition, output end (No. 3 terminals) connect the electricity of temperature sensing circuit
Source input, NE555 (U4) peripheral auxiliary circuits (R10, R11, C2, C15) are also included in this circuit.
Square-wave generator to temperature sensing circuit according to fixed time interval provide high level voltage, this function by
NE555 time-base integrated circuits are realized.NE555 constitutes multivibrator circuit with its peripheral circuit, passes through this multi-harmonic-oscillations electricity
Road can provide a square wave output, be exported at its crest for a stable high level voltage, trough is a low level
Voltage output.
When its voltage output state is a lasting low level, the power input terminal voltage value of temperature sensing circuit is
0, its voltage detecting end does not have voltage signal output, and output circuit is failure to actuate.Now, whole circuit is in power down mode, does not produce
Raw kwh loss.
When voltage output state is a lasting high level, the power input of temperature sensing circuit obtains one surely
There is voltage signal output at fixed magnitude of voltage, its voltage detecting end, and output circuit action, now whole circuit enters working condition,
Produce kwh loss.
In this embodiment, output circuit by operational amplifier (U3-A, U3-B, U3-C, U3-D), resistance (R5, R6, R7,
R8, R9) and light emitting diode (D1, D2, D3, D4) composition, the homophase input of operational amplifier (U3-A, U3-B, U3-C, U3-D)
The voltage detecting end of temperature sensing circuit is connected after end is in parallel；It is connected in series between the resistance (R5, R6, R7, R8, R9), and
And at being connected in series between resistance (R5, R6, R7, R8, R9) concatenation operation amplifier (U3-A, U3-B, U3-C, U3-D) it is anti-
Phase input；The output end of the operational amplifier (U3-A, U3-B, U3-C, U3-D) by light emitting diode (D1, D2, D3,
D4) it is grounded.
Thermistor RT1 resistance variations when the temperature is changed, the voltage of divider resistance produce, the electricity on fixed value resistance R1
When pressure is higher than the voltage on output circuit series resistance R9, operational amplifier U3-D produces deflection, light emitting diode (LED) D1
Bright, when voltage continues increase, light emitting diode D2, D3, D4 are lighted successively, and the light on and off situation of four light emitting diodes can refer to
Show different temperature ranges, user can judge temperature range, actual temp model according to the light on and off situation of four light emitting diodes
Enclose as shown in Figure 8.
Judge series in use, can be adjusted according to actual conditions in actual circuit, be exemplified as 4 grades, while can be according to reality
Situation adjusts series resistance R5, R6, R7, R8, R9 resistance to adjust temperature range.
This embodiment can draw the temperature range of current environmental temperature, can not draw accurate temperature value, and its is defeated
Going out that the series resistance quantity of circuit is more, the quantity in its section detected is also more, and the temperature span of interval value is also just smaller,
Accuracy of detection is so as to being improved.
This embodiment is exported by the time-sequential voltage of power supply circuit, is reduced the kwh loss of whole circuit, is actually made
During, it, which saves electricity, can reach the 50% of actual consumption, effectively save the kwh loss of battery, improve battery list
The usage time of secondary charging.
This embodiment only uses in the case where needing to judge environment temperature roughly, can not obtain accurate temperature value, such as
Current temperature value need to accurately be detected, it is necessary to using embodiment 2 embodiment, specific embodiment illustrates below.
Embodiment 2：
As shown in Figure 4 and Figure 5, in this embodiment, power supply circuit and output circuit merge into MCU (U2) and its auxiliary electricity
Road, the power input of MCU (U2) controllable level output end TEMP_DEP_CTR ends (P6.3) connection temperature sensing circuit.
The voltage detecting end of MCU (U2) TEMP_DET (P6.0) connection temperature sensing circuits.
In measurement process, the voltage that MCU (U2) detects the voltage detecting end of circuit by measurement temperature is current to calculate
Temperature, MCU_TEMP_DET_CTR are the GPIO in MCU control electric currents loop.C7、C8、C9、C10、C11、C12、C13、C14、XT1
For the peripheral circuit of MCU system, control temperature detection time is played, and carry out the function of voltage detecting.
When needing to measure Current Temperatures, MCU (U2) drags down MCU_TEMP_DET_CTR mouth level, now forms series connection
Current loop, then MCU (U2) by TEMP_DET come detect Current Temperatures detect circuit voltage detecting end magnitude of voltage calculate
The resistance ratio gone out between current fixed value resistance R1 and thermistor RT1, current thermistor RT1 resistance is calculated, then
Current Temperatures are drawn by tabling look-up, realize accurate temperature detection.
When not needing measurement temperature, MCU (U2) draws high MCU_TEMP_DET_CTR mouth level, now MCU_TEMP_
DET_CTR voltages are equal with VCC voltages, can not form current loop, would not also produce the consumption of electricity, therefore realize power saving
Pattern.
In this embodiment, MUC power supply output can be the high level signal of short time, or square-wave signal.
When power supply output is high level signal, the output time of its high level is a temperature detection process duration, herein
In the case of power saving effect it is best；When power supply output is square-wave signal, its power saving effect is equal to embodiment 1.
In this embodiment, MCU carries out the solution of square wave output or high level output by receiving external signal
For prior art, what is write by Tan Haoqiang《C programmer designs (fourth edition)》In recorded (publication date -- 2010
June 1, publishing house -- publishing house of Tsing-Hua University), and solution is given, implementation need not be write specific soft
Part, it can be achieved by MCU internal circuit configuration and existing software solution, the application protection is hardware circuit
Attachment structure, not comprising software section.
Embodiment 3：
As shown in fig. 6, in this embodiment, power supply circuit is that the square wave using NE555 time-base integrated circuits as main circuit is sent out
Raw device.Output circuit is MCU (U2), and MCU (U2) TEMP_DET ends connect the voltage detecting end of temperature sensing circuit.
The embodiment and beneficial effect of this embodiment have been described above in Examples 1 and 2, will not be repeated here.
Embodiment 4：
As shown in fig. 7, in this embodiment, power supply circuit is MCU (U2), MCU (U2) controllable level output end TEMP_
DEP_CTR ends (P6.3) connect the power input of temperature sensing circuit.Output circuit by operational amplifier (U3-A, U3-B,
U3-C, U3-D), resistance (R5, R6, R7, R8, R9) and light emitting diode (D1, D2, D3, D4) composition, operational amplifier (U3-A,
U3-B, U3-C, U3-D) in-phase input end parallel connection after connect temperature sensing circuit voltage detecting end；The resistance (R5, R6,
R7, R8, R9) between be connected in series, and connect at being connected in series between R5, R6, R7, R8, R9 U3-A, U3-B, U3-C,
U3-D inverting input；The output end of the operational amplifier (U3-A, U3-B, U3-C, U3-D) passes through light emitting diode
(D1, D2, D3, D4) is grounded.
The embodiment and beneficial effect of this embodiment have been described above in Examples 1 and 2, will not be repeated here.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the those of ordinary skill in domain is made in the essential scope of the present invention, should also belong to this hair
Bright protection domain.
Claims (4)
- A kind of 1. system for detecting temperature of achievable battery saving mode, it is characterised in that：Including the temperature for detecting environment temperature Circuit is detected, temperature sensing circuit connects promising temperature sensing circuit and provides the power supply circuit of operating voltage and for output temperature The output circuit of testing result；Outputs level signals from the power supply circuit to temperature sensing circuit discontinuity, in power supply circuit To during temperature sensing circuit outputs level signals, temperature sensing circuit detection environment temperature, output circuit is according to temperature detection The temperature signal output temperature testing result of electric circuit inspection, wherein, the power supply circuit is MCU, MCU controllable level output end The power input of temperature sensing circuit is connected, MCU power supply output is the high level signal or square-wave signal of short time.
- 2. the system for detecting temperature of achievable battery saving mode according to claim 1, it is characterised in that：The temperature detection Circuit includes thermistor and fixed value resistance；One end of the thermistor is power input, connects power supply circuit, the other end It is grounded by fixed value resistance；The junction of thermistor and fixed value resistance is arranged to voltage detecting end, and the connection of voltage detecting end is defeated Go out circuit and pass through capacity earth.
- 3. the system for detecting temperature of achievable battery saving mode according to claim 2, it is characterised in that：The output circuit Including N number of operational amplifier, N+1 resistance and N number of light emitting diode, N is the integer more than 1, the same phase of N number of operational amplifier The voltage detecting end of temperature sensing circuit is connected after input parallel connection；It is series circuit between N+1 resistance, and series circuit One end access voltage-stabilized power supply, the other end ground connection, two-by-two at the tie point of adjacent resistor concatenation operation amplifier anti-phase input End；The output end of the operational amplifier is grounded by light emitting diode.
- 4. the system for detecting temperature of achievable battery saving mode according to claim 2, it is characterised in that：The output circuit For MCU, the power input of MCU TEMP_DEP_CTR ends connection temperature sensing circuit, MCU TEMP_DET ends connection temperature Detect the voltage detecting end of circuit.
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| CN201410613997.8A CN104330187B (en) | 2014-11-04 | 2014-11-04 | A kind of system for detecting temperature of achievable battery saving mode |
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| CN201410613997.8A CN104330187B (en) | 2014-11-04 | 2014-11-04 | A kind of system for detecting temperature of achievable battery saving mode |
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Families Citing this family (5)
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| US9967939B2 (en) * | 2015-02-20 | 2018-05-08 | Hubbell Incorporated | Light emitting diode thermal foldback control device and method |
| CN104748313A (en) * | 2015-03-31 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner and temperature sampling device used for air conditioner |
| CN106644148B (en) * | 2017-01-20 | 2019-09-27 | 欧姆龙(上海)有限公司 | Temperature checking method, temperature-detecting device and temperature testing equipment |
| CN108688499A (en) * | 2018-05-25 | 2018-10-23 | 广汽丰田汽车有限公司 | Temperature of powered cell Acquisition Circuit and system, electric vehicle |
| CN109556070A (en) * | 2018-12-06 | 2019-04-02 | 奇瑞商用车（安徽）有限公司 | A kind of car headlamp dynamic lighting system |
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Effective date of registration: 20240506 Address after: 266104 No. 500, Songling Road, Laoshan District, Qingdao, Shandong Patentee after: GOERTEK TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 266061 floor 5, building 3, Guozhan wealth center, No. 18, Qinling Road, Laoshan District, Qingdao, Shandong Province Patentee before: QINGDAO GOERTEK TECHNOLOGY Co.,Ltd. Country or region before: China |
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