CN203164266U - Power source voltage measuring device, temperature detection device equipped with power source voltage measuring device, and temperature controller - Google Patents
Power source voltage measuring device, temperature detection device equipped with power source voltage measuring device, and temperature controller Download PDFInfo
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- CN203164266U CN203164266U CN 201320134952 CN201320134952U CN203164266U CN 203164266 U CN203164266 U CN 203164266U CN 201320134952 CN201320134952 CN 201320134952 CN 201320134952 U CN201320134952 U CN 201320134952U CN 203164266 U CN203164266 U CN 203164266U
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Abstract
The utility model relates to a power source voltage measuring device, a temperature detection device equipped with the power source voltage measuring device, and a temperature controller. The power source voltage measuring device comprises a resistor, a capacitor and a control device, wherein the control device comprises a comparator connected with the capacitor, a reference voltage source connected with the comparator, a timer and a calculation unit, the timer is used for recording a discharging time interval of the capacitor from a fully-charged state to a state that a voltage value of the capacitor detected by the comparator is equal to a voltage value of the reference voltage source, the calculation unit carries out capacitance value calculation to acquire a voltage value of a power source according to the voltage value of the reference voltage source, the time interval, a resistance value of the resistor and a capacitance value of the capacitor. The power source voltage measuring device can use one module of hardware to simultaneously realize functions of temperature measurement and voltage measurement, further has properties of simple and compact structure and relatively low cost.
Description
Technical field
The utility model relates to field of electric control, is specifically related to a kind of temperature-detecting device and temperature controller of measuring the device of supply voltage and comprising it.
Background technology
Along with the development of chip technology, its cost is more and more lower at present, and performance is from strength to strength, and this makes its application ubiquitous, spreads all over every field, for example, and Electric Machine Control, consumer electronics, game station, Industry Control and robotization and white domestic appliances etc.
Fig. 1 is a kind of device that is located on the chip, this device can be used on the opertaing device, specifically can be used for a kind of temperature controller, this device comprises a temperature measurement module 11 and a supply voltage indicator 12, and described temperature measurement module 11 is finished corresponding function separately as different modules respectively with described supply voltage indicator 12.Described temperature measurement module 11 is used for measuring temperature, and described supply voltage indicator 12 is for detection of supply voltage.But, in the chip that is provided with supply voltage indicator in the prior art, the element of described supply voltage indicator is integrated in chip internal, the more resource of chip internal will be taken, this can't guarantee the premium properties of chip, simultaneously, the chip with supply voltage indicator has higher cost, is unfavorable for production and sales.
Therefore, need improve the multifunctionality of assurance device when reducing cost to device of the prior art.
The utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of cost lower, simple in structure, and can realize the device of the measurement supply voltage of multiple function a module, comprising: the resistance that is electrically connected with power supply; One end is electrically connected with described resistance, the electric capacity of other end ground connection; The control device that is electrically connected with power supply, this control device comprises the comparer that is connected with described electric capacity, with the reference voltage source that described comparer is connected, timer and computing unit;
The described electric capacity of described timer record begins to discharge into the interval time of comparer when detecting capacitance voltage and equating with the magnitude of voltage of described reference voltage source from full state; Described computing unit calculates described power source voltage value according to the resistance value of the magnitude of voltage of described reference voltage source, described interval time, described resistance and the capacitance of described electric capacity.
The utility model also provides a kind of device of measuring supply voltage, comprising: the resistance that is electrically connected with power supply; One end is electrically connected with described resistance, the electric capacity of other end ground connection; The control device that is electrically connected with power supply, this control device comprises the comparer that is connected with electric capacity, with the reference voltage source that described comparer is connected, timer and computing unit;
Described reference voltage source comprises absolute reference voltage source and relative reference voltage source, and described control device is controlled described comparer and is connected with described absolute reference voltage source or described relative reference voltage source; When described control device control comparer connects described relative reference voltage source, the described electric capacity of described timer record begins to discharge into magnitude of voltage that described comparer detects described electric capacity interval time one when equating with the magnitude of voltage of described relative reference voltage source from full state, when described control device is controlled described comparer and is connected described absolute reference voltage source, the described electric capacity of described timer record begins to discharge into magnitude of voltage that described comparer detects described electric capacity interval time two when equating with the magnitude of voltage of described absolute reference voltage source from full state, and described computing unit is according to described interval time one, the magnitude of voltage of interval time two and absolute reference voltage source calculates supply voltage value.
The described interval time one of said apparatus and described interval time two are to obtain in twice adjacent charge and discharge cycle at described electric capacity.
The utility model also provides a kind of Device Testing device that comprises above-mentioned arbitrary measurement supply voltage, comprises chip; Described chip is provided with thermal detector, and described thermal detector can detect the temperature of described chip, and described computing unit can calculate the magnitude of voltage of described absolute reference voltage source according to the temperature of described chip.
The utility model also provides a kind of temperature-detecting device, comprises, above-mentioned arbitrary device; The thermistor that is electrically connected with described electric capacity in described arbitrary device;
Control device in described arbitrary device can be selected to discharge by described resistance or thermistor when described electric capacity discharges from full state, thereby measures the temperature of power source voltage value or measurement external environment.
The described control device of said temperature pick-up unit is selected when controlling described electric capacity and discharging from full state to discharge by described resistance, and described timer records described electric capacity and begins to discharge into magnitude of voltage that comparer detects described electric capacity interval time three when equating with the magnitude of voltage of described reference voltage source from full state;
Described control device is selected when controlling described electric capacity and discharging from full state to discharge by described thermistor, and described timer records described electric capacity and begins to discharge into magnitude of voltage that comparer detects described electric capacity interval time four when equating with the magnitude of voltage of described reference voltage source from full state;
Described computing unit is according to described interval time three, and described interval time four and resistance value are calculated the respective resistance values of described thermistor, further obtains the temperature value of external environment.
The described computing unit of said temperature pick-up unit can calculate the magnitude of voltage of described absolute reference voltage source according to described temperature value.
The utility model also provides a kind of temperature controller, and described temperature controller comprises above-mentioned arbitrary device.
The device of the measurement supply voltage of one or more embodiment that the utility model provides is applicable on the various chips, be not exclusively used in the supply voltage indicator that detects supply voltage in the described chip, but can be by the resistance in the functional module on the chip, electric capacity, and control device detects the power source voltage value of this device.
Further, described control device comprises comparer, reference voltage source, timer and computing unit, timer picks up counting when full state begins to discharge from described electric capacity, when comparer detects the capacitance discharges magnitude of voltage and equates with the magnitude of voltage of relative reference voltage source, timer records interval time, and described computing unit calculates described power source voltage value by interval time and the magnitude of voltage of reference voltage source, the resistance value of resistance and the capacitance of electric capacity of timer record.
The another kind of one or more embodiment that the utility model provides is measured the device of supply voltage, wherein, reference voltage source in the described control device comprises absolute reference voltage source and relative reference voltage source, control device control comparer is connected with the relative reference voltage source, timer picks up counting when full state begins to discharge from described electric capacity, when comparer detects the capacitance discharges magnitude of voltage and equates with the magnitude of voltage of relative reference voltage source, timer records interval time one, control device control comparer is connected with the absolute reference voltage source, timer is the logging interval time two in the same way, described computing unit can be according to interval time one, and the magnitude of voltage of interval time two and absolute reference voltage source calculates the power source voltage value.Computing unit in this control device can avoid using the resistance of resistance and the capacitance of electric capacity to calculate the power source voltage value.
Above-mentioned control device can be controlled timer and record above-mentioned interval time one and interval time two respectively in discrete twice charge and discharge process of electric capacity, can avoid the timer timing continually in the control device;
In addition, described timer also can be in twice continuous charge and discharge process of electric capacity logging interval time one and interval time two, make that the supply voltage value that calculates is more accurate.
The Device Testing device of measuring supply voltage that comprises of one or more embodiment that the utility model provides also comprises thermal detector on the chip, but the temperature of this thermal detector detection chip, described computing unit can calculate the magnitude of voltage of described absolute reference voltage source according to the temperature of described chip, can make like this to need not to be provided with on the chip and be exclusively used in the interface that detects the absolute reference voltage source, when avoiding taking the more resource of chip, record the magnitude of voltage of absolute reference voltage source.When this pick-up unit was used for temperature controller, computing unit also can calculate the magnitude of voltage of absolute reference voltage source according to the temperature value of the detected external environment of described temperature controller.
When the temperature-detecting device of one or more embodiment that the utility model provides can be measured the temperature of external environment, also can measure power source voltage; This temperature-detecting device comprises a thermistor, when selection was discharged by resistance when the control device control capacitance was discharged from full state, the described electric capacity of described timer record begins to discharge into magnitude of voltage that comparer detects described electric capacity interval time three when equating with the magnitude of voltage of described reference voltage source from full state, and this moment, computing unit can calculate the power source voltage value; Simultaneously, when discharging from full state, the control device control capacitance selects to discharge by described thermistor, timer is the logging interval time four in the same way, this moment, computing unit can be according to interval time three, interval time four, the resistance of resistance value and thermistor calculates the temperature value of external environment; Further, computing unit also can be measured the magnitude of voltage of above-mentioned absolute reference voltage source according to the temperature value of external environment.
The temperature controller of one or more embodiment that the utility model provides can use a temperature measurement module of chip to realize thermometric and pressure measurement function simultaneously.In the normal use of each function that guarantees chip, avoided taking the more resource of described chip.
Description of drawings
Fig. 1 is a kind of device synoptic diagram of prior art;
Fig. 2 is a kind of device synoptic diagram that one of the utility model embodiment provides;
Fig. 3 is the oscillogram that discharges and recharges of the electric capacity in a kind of device that one of the utility model embodiment provides;
A kind of device synoptic diagram that one of Fig. 4 the utility model embodiment provides;
Fig. 5 is the oscillogram that discharges and recharges of the electric capacity in a kind of device that one of the utility model embodiment provides;
Fig. 6 is the oscillogram that discharges and recharges of the electric capacity in a kind of device that one of the utility model embodiment provides;
Fig. 7 is a kind of device synoptic diagram that one of the utility model embodiment provides;
Fig. 8 is a kind of temperature of providing of one of the utility model embodiment and the graph of a relation of voltage;
Fig. 9 is a kind of device synoptic diagram that one of the utility model embodiment provides;
Figure 10 is a kind of temperature of providing of one of the utility model embodiment and the graph of a relation of voltage.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the technical solution of the utility model is described further.Following description related to the preferred embodiment only is exemplary, and never is the restriction to the utility model and application or usage.
Embodiment 1
The utility model embodiment has protected a kind of device of measuring supply voltage; the device of described measurement supply voltage can be used on the chip; be not exclusively used in the supply voltage indicator that detects supply voltage in the described chip, but still can detect the power source voltage value in the circuit.Concrete, the device of described measurement supply voltage can calculate described power source voltage value by existing related elements in a comparer in other modules on the described chip and some circuit.Fig. 2 shows a kind of device of measuring supply voltage of present embodiment, comprises the resistance 22 that is electrically connected with power supply 21; One end is electrically connected with described resistance 22, the electric capacity 23 of other end ground connection; The control device 20 that is electrically connected with power supply 21, this control device 20 comprises the comparer 24 that is connected with described electric capacity 23, with the reference voltage source 25 that described comparer 24 is connected, timer 26 and computing unit 27;
Described timer 26 can record described electric capacity and begin to discharge into magnitude of voltage that comparer 24 detects electric capacity interval time when equating with the magnitude of voltage of described reference voltage source from full state; Described computing unit 27 calculates the magnitude of voltage of described power supply 21 according to the capacitance of the resistance value of the magnitude of voltage of described reference voltage source 25, described interval time, described resistance 22 and described electric capacity 23.Need not in this device to use the special-purpose device for detection of supply voltage, the computing unit that is connected with timer can calculate described power source voltage value according to the resistance value of the magnitude of voltage of described reference voltage source, described interval time, described resistance and the capacitance of described electric capacity.
Concrete, described electric capacity 23 is in charge and discharge process, when after described electric capacity 23 is full of, beginning to discharge, described timer 26 picks up counting, described comparer 24 is the magnitude of voltage of electric capacity 23 in discharge process and the magnitude of voltage of reference voltage source 25 relatively, when the magnitude of voltage of described electric capacity is reduced to when equating with the magnitude of voltage of described reference voltage source 25, described comparer 24 sends signal to described timer 26, the time interval t of described timer 26 these sections of record, the described computing unit 27 of described control device 20 can be according to the magnitude of voltage of described reference voltage source 25, the interval time of described timer 26 records, the capacitance of the resistance value of resistance 22 and electric capacity 23 calculates the magnitude of voltage of described power supply 21.
Fig. 3 shows the oscillogram that discharges and recharges of electric capacity 23 in the present embodiment.Described electric capacity begins charging constantly from t0, and when beginning to discharge after described electric capacity is full of electricity, described timer picks up counting, when the voltage of described electric capacity 23 is reduced to when consistent with the magnitude of voltage of described reference voltage source described timer record t interval time.
Concrete, the voltage of described power supply 21 is Vcc, and the voltage of described reference voltage source 28 is Ez, and the described comparer 24 of described timer 26 records sends t interval time of signal, the described computing unit 27 that is connected with described timer 26 can calculate described power source voltage by formula (1) so
Vcc=Ez/EXP(-t/RC) （1）
This device need not to use special-purpose supply voltage indicator by calculating the power source voltage value, has avoided taking the more resource of chip, simultaneously, also has lower cost.
Embodiment 2
The utility model embodiment provides the device of another kind of measurement supply voltage, comprises the resistance 32 that is electrically connected with power supply 31; One end is electrically connected with described resistance 32, the electric capacity 33 of other end ground connection; The control device 30 that is electrically connected with power supply 31, this control device 30 comprises the comparer 34 that is connected with electric capacity, with the reference voltage source that described comparer 34 is connected, timer 36 and computing unit 37; Fig. 4 shows the device of the measuring voltage power supply of one of present embodiment.
Described reference voltage source comprises absolute reference voltage source 38 and relative reference voltage source 39, and described control device 30 can be controlled described comparer 34 and be connected 39 with described absolute reference voltage source 38 or described relative reference voltage source;
Concrete, described control device 30 switches to when making that described comparer 34 is connected with described relative reference voltage source 39 by an on-off element 35, when described electric capacity 33 begins to discharge from full state, described timer 36 picks up counting, when the magnitude of voltage that detects described electric capacity 33 up to described comparer 34 equated with the magnitude of voltage of described relative reference voltage source 39, timer record was to t1 interval time one of this section period.
Further, the voltage of described relative reference voltage source 39 can be realized by resistor assembly, described resistor assembly is formed by a plurality of small resistor series connection, we suppose that described resistor assembly comprises the small resistor that n resistance value equates herein, a described n small resistor is electrically connected with power supply, the on-off element 35 that passes through of wherein said comparer 34 is connected with first small resistor in the described resistor assembly, at this moment, the magnitude of voltage of described relative reference voltage source 39 is 1/n times of described power source voltage value, make a=1/n, a is constant so, and 0＜a＜1.So, according to formula (1), can learn formula (2),
Vcc=aVcc/EXP (t1/RC); (a is constant, and 0＜a＜1) (2)
Further, can extrapolate formula (3), RC=-t1/ln (a), (3)
When described control device 30 connects described absolute reference voltage source 38 by the described comparer 34 of on-off element 35 controls, the described electric capacity 33 of described timer 36 records begins to discharge into magnitude of voltage that described comparer 34 detects described electric capacity 33 t2 interval times two when equating with the magnitude of voltage of described absolute reference voltage source 38 from full state
Described absolute reference voltage source 38 can be connected with described comparer 34 by an interface on the chip, and at this moment, the magnitude of voltage Ez of absolute reference voltage source 38 is known quantity, according to formula (1), can learn,
Vcc=Ez/EXP(-t2/RC)，（4）
Further, in conjunction with formula (3) and formula (4), described computing unit 37 can calculate power source voltage by following formula,
Vcc=Ez/EXP(t2*ln(a)/t1)。(5)
Concrete, the described resistor assembly in the utility model present embodiment can comprise 4 small resistors.At this moment, the magnitude of voltage of described relative reference voltage source 39 is 0.25 times of magnitude of voltage of described power supply 31.So, according to formula (1), can learn that the voltage of described power supply 31 is, (t1/RC), further, can extrapolate, RC=-t1/ln (0.25) in conjunction with formula (5), can extrapolate described power source voltage and is 0.25Vcc=Vcc*EXP
Vcc=Ez/EXP(t2*ln(0.25)/t1) （6）
In addition, in order further to reduce the computing of logarithm in the formula (6), we can at first calculate the value of t2*ln (0.25)/t1, calculate logarithm operation by the mode of tabling look-up then, (numerical value of t2*ln (0.25)/t1) obtains the power source voltage value at last namely to calculate EXP.The same like this more resource of avoiding taking chip.
From formula (5) or (6) as can be known, when described reference voltage source comprises relative reference voltage source 39 and absolute reference voltage source 38 and an on-off element 35, we only need know when on-off element 35 is connected with described relative reference voltage source 39, the comparer 34 of described timer 36 records sends the interval time one of signal, and when described on-off element 35 is connected with described absolute reference voltage source 38, the comparer 34 of described timer 36 records sends the interval time two of signal, and the voltage of described absolute reference voltage source, just can calculate the power source voltage value by described computing unit 37.Owing to have the computing of logarithm in the formula (5), still can in described resistor assembly, design the small resistor of suitable quantity, make things convenient for the logarithm value in the computing formula.
In addition, above-mentioned interval time one and interval time two can be to obtain in discrete twice charge and discharge process of described electric capacity.
Fig. 5 shows described electric capacity discrete and discharges and recharges interval time one of obtaining in the cycle and the oscillogram of interval time two, and the voltage of supposing relative reference voltage source herein is 0.25Vcc.At t0 constantly, described electric capacity 33 begins charging, the described 36 opening entry times of timer after 33 chargings of described electric capacity are finished and when beginning to discharge, be reduced to when consistent with the magnitude of voltage of described relative reference voltage source 39 up to the magnitude of voltage of described electric capacity 33, described comparer 34 sends signal to described timer 36, and be t1 the interval time one of described timer 36 records.At described electric capacity through repeatedly all after dates that discharges and recharges, in the charge and discharge process of electric capacity 33 when the described comparer of described control device 30 controls is connected with absolute reference voltage source 38, the timing again after 33 chargings of described electric capacity are finished and when beginning to discharge of described timer 36, when the magnitude of voltage of described electric capacity 33 is reduced to when equating with the magnitude of voltage of described absolute reference voltage source 38, be t2 the interval time two of described timer 36 records.
Optionally, above-mentioned interval time one and interval time two also can be to obtain in twice adjacent charge and discharge cycle at described electric capacity,
Fig. 6 shows when described on-off element 35 is connected with described relative reference voltage source 38, the oscillogram of the time that discharges and recharges of described electric capacity 33, and the voltage of supposing relative reference voltage source herein is 0.25Vcc.At t0 constantly, described electric capacity 33 begins charging, the described 49 opening entry times of timer after 33 chargings of described electric capacity are finished and when beginning to discharge, be reduced to when consistent with the voltage of described relative reference voltage source 52 up to the voltage of described electric capacity 33, described comparer 54 sends signal to described timer 49, and the time of described timer 49 records is t1.In the charge and discharge process next time of described electric capacity 33, the described comparer 34 of described control device 30 controls is connected with described absolute reference voltage source 38, the described 36 opening entry times of timer after 33 chargings of described electric capacity are finished and when beginning to discharge, be reduced to when consistent with the voltage of described absolute reference voltage source 38 up to the magnitude of voltage of described electric capacity 33, described comparer 34 sends signal to described timer 36, and two times of interval time of described timer 36 records are t2.
In the device of present embodiment, t1 interval time that described computing unit 37 only records by described timer 49, t2, and the magnitude of voltage of absolute reference voltage source 51 calculates the voltage of described power supply 31.Avoided using the resistance value of resistance and the capacitance of electric capacity to calculate power source voltage, can reduce error, made that the power source voltage value that calculates is more accurate.
The utility model embodiment also provides a kind of pick-up unit, and this pick-up unit comprises the device among embodiment 1 or the embodiment 2.Described pick-up unit also comprises chip, and described chip also comprises a thermal detector 40, and described thermal detector 40 can detect the temperature of described chip.Fig. 7 shows a kind of pick-up unit in the present embodiment, computing unit 47 in the present embodiment can obtain the magnitude of voltage of the absolute reference voltage source 48 in above-described embodiment by the temperature value of described chip by the mode of tabling look-up simultaneously, when pressure measurement, need not to be provided with at chip the indicator of the magnitude of voltage that is exclusively used in the described absolute reference voltage source of indication on the pick-up unit in the present embodiment, reduce the resource of using on the chip.
Concrete, the method by temperature compensation at first, obtain the magnitude of voltage roughly of absolute reference voltage source, use the mode bucking voltage of tabling look-up then, can make the magnitude of voltage of described absolute reference voltage source drop in the less voltage range like this, obtain the voltage of absolute reference voltage source comparatively accurately then.Fig. 8 is the voltage of absolute reference voltage source when supply voltage is respectively 3V and 2.2V and the graph of a relation of described temperature, can find the voltage of described absolute reference voltage source 38 comparatively accurately by the mode of tabling look-up, calculate power source voltage value accurately by formula (5) then.
Embodiment 4
The utility model embodiment also provides a kind of temperature-detecting device, and described temperature-detecting device comprises the arbitrary device in above-described embodiment 1 to embodiment 3 and the thermistor that is electrically connected with described electric capacity.Described temperature-detecting device has the function of measuring temperature on the one hand, simultaneously, realizes that the element of its temp sensing function also has the function of measuring supply voltage.
Described control device can be selected to discharge by described resistance or thermistor when described electric capacity discharges from full state, thereby measures the temperature of power source voltage value or measurement external environment.
Fig. 9 shows a kind of temperature-detecting device in this enforcement, when described electric capacity 53 is full of the preparation discharge of electricity back, the described electric capacity 53 of described control device 50 controls is selected to discharge by described resistance 52, described timer 56 picks up counting, when the magnitude of voltage of described electric capacity 53 is reduced to when consistent with the magnitude of voltage of described reference voltage source the described 56 logging interval times three of timer; Reference voltage source herein can be absolute reference voltage source 58, also can be relative reference voltage source 59.
When described electric capacity 53 is full of the preparation discharge of electricity back, the described electric capacity 53 of described control device 50 controls is selected to discharge by described thermistor 55, described timer 56 picks up counting, when the magnitude of voltage of described electric capacity 53 is reduced to when consistent with the magnitude of voltage of described reference voltage source the described 56 logging interval times four of timer;
Figure 10 shows the oscillogram that twice of electric capacity 53 discharges and recharges the time respectively.
Described computing unit 47 can be according to described interval times three of t3, and described interval times four, t4 and resistance value R1 calculated the respective resistance values R2 of described thermistor 55, wherein, t3/t4=R1/R2, the resistance of so described thermistor 55 is R2=R1*t4/t3.
The temperature value that further, can described chip can obtain external environment by the mode of tabling look-up.
The utility model embodiment has also protected a kind of temperature controller; temperature measurement module in the described temperature controller can provide temperature; obtain the voltage of described absolute reference voltage source by tabling look-up, the supply voltage that utilizes comparer in the temperature measurement module and timer to calculate described temperature controller then.This design can make and the function that the temperature measurement module of temperature controller reaches thermometric simultaneously and measures supply voltage need not additionally to arrange one and be exclusively used in the indicator of measuring supply voltage on the chip of described temperature controller.Reduce the resource that has taken chip, also reduced cost.
It should be understood that; the circuit that the utility model is protected also can be used for multiple electronic product; when the circuit of protecting when the utility model is used for temperature controller, also can calculate the magnitude of voltage of absolute reference voltage source according to the temperature value of the detected external environment of described temperature controller.
Need to prove, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having under the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The above is preferred embodiment of the present utility model only, is not for limiting protection domain of the present utility model.All any modifications of within spirit of the present utility model and principle, doing, be equal to replacement, improvement etc., all be included in the protection domain of the present utility model.
Claims (8)
1. a device of measuring supply voltage is characterized in that, comprising:
The resistance that is electrically connected with power supply;
One end is electrically connected with described resistance, the electric capacity of other end ground connection;
The control device that is electrically connected with power supply, this control device comprises the comparer that is connected with described electric capacity, with the reference voltage source that described comparer is connected, timer and computing unit;
The described electric capacity of described timer record begins to discharge into the interval time of comparer when detecting capacitance voltage and equating with the magnitude of voltage of described reference voltage source from full state; Described computing unit calculates described power source voltage value according to the resistance value of the magnitude of voltage of described reference voltage source, described interval time, described resistance and the capacitance of described electric capacity.
2. a device of measuring supply voltage is characterized in that, comprising:
The resistance that is electrically connected with power supply;
One end is electrically connected with described resistance, the electric capacity of other end ground connection;
The control device that is electrically connected with power supply, this control device comprises the comparer that is connected with electric capacity, with the reference voltage source that described comparer is connected, timer and computing unit;
Described reference voltage source comprises absolute reference voltage source and relative reference voltage source, and described control device is controlled described comparer and is connected with described absolute reference voltage source or described relative reference voltage source; When described control device control comparer connects described relative reference voltage source, the described electric capacity of described timer record begins to discharge into magnitude of voltage that described comparer detects described electric capacity interval time one when equating with the magnitude of voltage of described relative reference voltage source from full state, when described control device is controlled described comparer and is connected described absolute reference voltage source, the described electric capacity of described timer record begins to discharge into magnitude of voltage that described comparer detects described electric capacity interval time two when equating with the magnitude of voltage of described absolute reference voltage source from full state, and described computing unit is according to described interval time one, the magnitude of voltage of interval time two and absolute reference voltage source calculates supply voltage value.
3. device according to claim 2 is characterized in that, described interval time one and described interval time two are to obtain in twice adjacent charge and discharge cycle at described electric capacity.
4. a Device Testing device that comprises claim 2 or 3 described measurement supply voltages is characterized in that, comprises chip; Described chip is provided with thermal detector, and described thermal detector can detect the temperature of described chip, and described computing unit can calculate the magnitude of voltage of described absolute reference voltage source according to the temperature of described chip.
5. temperature-detecting device is characterized in that: comprises,
The described arbitrary device of claim 1-4;
The thermistor that is electrically connected with described electric capacity in described arbitrary device;
Control device in described arbitrary device can be selected to discharge by described resistance or thermistor when described electric capacity discharges from full state, thereby measures the temperature of power source voltage value or measurement external environment.
6. temperature-detecting device according to claim 5, it is characterized in that, described control device is selected when controlling described electric capacity and discharging from full state to discharge by described resistance, and described timer records described electric capacity and begins to discharge into magnitude of voltage that comparer detects described electric capacity interval time three when equating with the magnitude of voltage of described reference voltage source from full state;
Described control device is selected when controlling described electric capacity and discharging from full state to discharge by described thermistor, and described timer records described electric capacity and begins to discharge into magnitude of voltage that comparer detects described electric capacity interval time four when equating with the magnitude of voltage of described reference voltage source from full state;
Described computing unit is according to described interval time three, and described interval time four and resistance value are calculated the respective resistance values of described thermistor, further obtains the temperature value of external environment.
7. temperature-detecting device according to claim 6 is characterized in that, described computing unit can calculate the magnitude of voltage of described absolute reference voltage source according to described temperature value.
8. a temperature controller is characterized in that, described temperature controller comprises the arbitrary described device of claim 1-7.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320134952 CN203164266U (en) | 2013-03-22 | 2013-03-22 | Power source voltage measuring device, temperature detection device equipped with power source voltage measuring device, and temperature controller |
| US14/153,334 US9261540B2 (en) | 2013-03-22 | 2014-01-13 | Devices for measuring voltage of a power supply, detection devices, and temperature controllers |
| US15/043,709 US20160161563A1 (en) | 2013-03-22 | 2016-02-15 | Devices for Measuring Voltage of a Power Supply, Detection Devices, and Temperature Controllers |
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| CN 201320134952 CN203164266U (en) | 2013-03-22 | 2013-03-22 | Power source voltage measuring device, temperature detection device equipped with power source voltage measuring device, and temperature controller |
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| CN203164266U true CN203164266U (en) | 2013-08-28 |
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| CN 201320134952 Expired - Lifetime CN203164266U (en) | 2013-03-22 | 2013-03-22 | Power source voltage measuring device, temperature detection device equipped with power source voltage measuring device, and temperature controller |
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| CN (1) | CN203164266U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852193A (en) * | 2014-02-24 | 2014-06-11 | 深圳市普林泰克科技有限公司 | High-performance low-cost temperature detection method for wireless charger |
| CN104062482A (en) * | 2013-03-22 | 2014-09-24 | 艾默生电气公司 | Power voltage measuring device, temperature detecting device comprising same, and temperature controller |
-
2013
- 2013-03-22 CN CN 201320134952 patent/CN203164266U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062482A (en) * | 2013-03-22 | 2014-09-24 | 艾默生电气公司 | Power voltage measuring device, temperature detecting device comprising same, and temperature controller |
| CN104062482B (en) * | 2013-03-22 | 2017-07-25 | 艾默生电气公司 | Measure the device of supply voltage and temperature-detecting device and temperature controller comprising it |
| CN103852193A (en) * | 2014-02-24 | 2014-06-11 | 深圳市普林泰克科技有限公司 | High-performance low-cost temperature detection method for wireless charger |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130828 Effective date of abandoning: 20170725 |