CN106937207A - For the temperature compensation means and method of external sensor - Google Patents
For the temperature compensation means and method of external sensor Download PDFInfo
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- CN106937207A CN106937207A CN201511018818.7A CN201511018818A CN106937207A CN 106937207 A CN106937207 A CN 106937207A CN 201511018818 A CN201511018818 A CN 201511018818A CN 106937207 A CN106937207 A CN 106937207A
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- temperature
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- compensation
- external sensor
- sensor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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Abstract
A kind of temperature compensation means for external sensor is disclosed, including：Preamplifier, for receiving sensing signal from the external sensor；Temperature sensor, the ambient temperature signal for obtaining the external sensor, wherein, the temperature signal variation with temperature monotonic increase or monotone decreasing；Temperature-compensation circuit, for obtaining the thermal compensation signal compensated to the sensing signal according to the temperature signal；Wherein, the temperature sensor is arranged near the preamplifier.The present invention also provides a kind of temperature compensation for external sensor, temperature sensor is arranged near the preamplifier, more accurately obtain the ambient temperature signal of external sensor, and the sensing signal that external sensor is exported is compensated according to the temperature signal, improve the precision of temperature-compensating.
Description
Technical field
The present invention relates to microcomputer electrical domain, and in particular to a kind of temperature-compensating for external sensor
Device and method.
Background technology
Micro electronmechanical (MEMS micro-electro-mechanical system) device have small volume,
Long lifespan, energy consumption are low, the features such as be easily integrated and be with low cost, thus industry, information,
The fields such as Aero-Space, national defence are widely used.
Temperature coefficient is the speed that changes with temperature change of physical attribute of material.Temperature coefficient
There is positive and negative point, positive temperature coefficient refers to physical attribute and raised with temperature and increased, negative temperature system
Number refers to physical attribute and is raised with temperature and reduced.
In the prior art, temperature sensor typically is set after microphone output.However, by
In temperature sensor and microphone core position space length farther out, it is impossible to really indicate microphone
Core position operating temperature, influences the precision of temperature-compensating.
The content of the invention
In view of this, the present invention provides a kind of temperature compensation means and method for external sensor.
According to an aspect of the present invention, there is provided a kind of temperature compensation means for external sensor,
Including：Preamplifier, for receiving sensing signal from the external sensor；Temperature sensor,
Ambient temperature signal for obtaining the external sensor, wherein, the temperature signal is with temperature
Change monotonic increase or monotone decreasing；Temperature-compensation circuit, for being obtained according to the temperature signal
Take the thermal compensation signal compensated to the sensing signal；Wherein, the temperature sensor is arranged on
Near the preamplifier.
Preferably, the external sensor is MEMS or ECM devices.
Preferably, the distance between the temperature sensor and described pre-stage amplifiers are less than 2mm.
Preferably, the temperature compensation means also includes：Control module, receives for basis
Control signal controls the temperature-compensation circuit to provide thermal compensation signal to signal processing circuit or do not carry
For thermal compensation signal.
Preferably, the temperature-compensation circuit also includes multiple temperature compensation modules, the control mould
Root tuber controls the multiple temperature compensation module to be carried to signal processing circuit according to the control signal for receiving
Thermal compensation signal is not provided for thermal compensation signal or.
Preferably, the temperature compensation means also includes：Analog-digital converter, for from described preposition
Amplifier receives the sensing signal after amplifying and receives thermal compensation signal from the temperature-compensation circuit.
Preferably, the temperature compensation means also includes：Control module, receives for basis
The control signal control temperature-compensation circuit is to analog-digital converter offer thermal compensation signal or not
Thermal compensation signal is provided.
Preferably, the temperature-compensation circuit includes multiple temperature compensation modules, the control module
The multiple temperature compensation module is controlled to be carried to the analog-digital converter according to the control signal for receiving
Thermal compensation signal is not provided for thermal compensation signal or.
According to another aspect of the present invention, there is provided a kind of temperature compensation for external sensor,
Including：Preamplifier obtains the sensing signal of the external sensor；Temperature sensor obtains outer
The ambient temperature signal of portion's sensor, wherein, the temperature sensor is arranged on the preposition amplification
Near device；Temperature-compensation circuit obtains the benefit compensated to sensing signal according to the temperature signal
Repay signal.
Preferably, the temperature compensation also includes：Control module is according to the control letter for receiving
Number control temperature-compensation circuit provides thermal compensation signal or does not provide compensation to signal processing circuit
Signal.
According to temperature compensation means and method provided by the present invention for external sensor, by temperature
Sensor is arranged near the preamplifier, more accurately obtains the environment temperature of external sensor
Degree signal, and the sensing signal that external sensor is exported is compensated according to the temperature signal,
Improve the precision of temperature-compensating.
Brief description of the drawings
By description referring to the drawings to the embodiment of the present invention, it is of the invention above-mentioned and other
Objects, features and advantages will be apparent from, in the accompanying drawings：
Fig. 1 is the structure of the temperature compensation means for external sensor according to embodiments of the present invention
And principle schematic；
Fig. 2 shows the temperature-compensating dress for external sensor according to another embodiment of the present invention
The structure and principle schematic put；
Fig. 3 is the temperature compensation for external sensor for providing according to embodiments of the present invention
Flow chart.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these
Embodiment.Below to detailed description of the invention in, it is detailed to describe some specific detail portions
Point.The description of part can also completely understand this without these details for a person skilled in the art
Invention.In order to avoid obscuring essence of the invention, known method, process, flow, element and
Circuit does not have narration in detail.Additionally, it should be understood by one skilled in the art that providing herein
Accompanying drawing be provided to descriptive purpose, and accompanying drawing is not necessarily drawn to scale.
It will also be appreciated that in the following description, " circuit " refer to by least one element or
The galvanic circle that sub-circuit is connected and composed by electrical connection or electromagnetism." connected when element or circuit is claimed
To " between two nodes of another element or element/circuit " being connected to " when, it can be direct coupling
Connect or be connected to another element or there may be intermediary element, the connection between element can be thing
In reason, in logic or its combination.Unless the context clearly requires otherwise, otherwise whole explanation
With " including " in claims, etc. "comprising", similar word should be construed to the implication for including to book
Rather than exclusive or exhaustive implication；That is, the implication for being " including but not limited to ".
In the description of the invention, it is to be understood that term " first ", " second " etc. are only used for
Description purpose, and it is not intended that indicating or implying relative importance.Additionally, being retouched of the invention
In stating, unless otherwise indicated, " multiple " is meant that two or more.
Fig. 1 is the structure of the temperature compensation means for external sensor according to embodiments of the present invention
And principle schematic.As shown in figure 1, the temperature compensation means includes preamplifier 10, temperature
Degree sensor 20 and temperature-compensation circuit 30.
Preamplifier 10, for receiving sensing signal from the external sensor.
In the present embodiment, external sensor can be MEMS or ECM devices.Tool
Body ground, MEMS or ECM devices can be MEMS microphone or ECM microphones,
The MEMS microphone or ECM microphones are simulation microphone.Wherein, the MEMS
Microphone can be MEMS capacitive microphone, and the ECM microphones are electret microphone.
It is described as a example by simulating microphone in the present embodiment.
In one example, preamplifier 10 can include audio-frequency amplifier or one or two
Other amplifiers above.Audio-frequency amplifier or one or more other amplifiers are from Mike
Wind receives sensing signal (for example, audio output etc.), and provides sense to follow-up signal processing circuit
Survey signal (for example, amplified audio signal etc.).
Temperature sensor 20, the ambient temperature signal for obtaining the external sensor, wherein,
The temperature signal variation with temperature monotonic increase or monotone decreasing.
In the present embodiment, the temperature sensor is arranged near the preamplifier.Temperature
Sensor 20 is used to obtain the ambient temperature signal of external sensor, in order to obtain more accurate temperature
Signal, then temperature sensor 20 must be at the core position of microphone.Due to preamplifier
10 receive sensing signal from external sensor, then preamplifier 10 is close apart from external sensor.
When temperature sensor 20 is placed near preamplifier 10, more accurate temperature can be obtained
Signal.In operating temperature range (- 20 DEG C~50 DEG C), temperature signal is linearly related to temperature.Temperature
Degree signal is that voltage signal is corresponded with environment temperature.The temperature coefficient of the temperature signal is equal to
The temperature coefficient of the sensing signal.
In one example, between the temperature sensor 20 and the pre-stage amplifiers 10
2mm is less than apart from d.
Temperature-compensation circuit 30, is carried out for being obtained according to the temperature signal to the sensing signal
The thermal compensation signal of compensation.
In the present embodiment, temperature-compensation circuit 30 is connected with the temperature sensor 20, receives
The temperature signal that the temperature sensor 20 sends, and obtained to the sense according to the temperature signal
Survey the thermal compensation signal that signal is compensated.
In a preferred embodiment, the temperature compensation means also includes control module 40, uses
The control signal received in basis controls the temperature-compensation circuit to provide benefit to signal processing circuit
Repay signal or thermal compensation signal is not provided.
In a preferred embodiment, the temperature-compensation circuit includes multiple temperature compensation modules,
The control module 40 according to the control signal that receives control the multiple temperature compensation module to
Signal processing circuit provides thermal compensation signal or does not provide thermal compensation signal.
In the present embodiment, temperature range is often used for microphone, it is preset in temperature-compensation circuit
Several compensation models, control preset compensation model compensation or do not mend according to the control signal for receiving
Repay.Preset compensation model is to set up external sensor (such as microphone) output and temperature sensor
Relation between output (i.e. temperature signal).
According to the temperature compensation means provided by the present invention for external sensor by temperature sensor
It is arranged near the preamplifier, more accurately obtains the ambient temperature signal of external sensor,
And the sensing signal that external sensor is exported is compensated according to the temperature signal, improve temperature
The precision of compensation.
Fig. 2 is the temperature compensation means for external sensor according to another embodiment of the present invention
Structure and principle schematic.As shown in Fig. 2 the temperature compensation means include preamplifier 10,
Temperature sensor 20, temperature-compensation circuit 30 and analog-digital converter 50.
Preamplifier 10, for receiving sensing signal from the external sensor.
In the present embodiment, external sensor can be MEMS or ECM devices.Tool
Body ground, MEMS or ECM devices can be MEMS microphone or ECM microphones,
The MEMS microphone or ECM microphones are digital microphone.Wherein, the MEMS
Microphone can be MEMS capacitive microphone, and the ECM microphones are electret microphone.
Digital microphone is to increase analog-digital converter on the basis of microphone is simulated, defeated by microphone is simulated
The analog signal for going out is converted into data signal, as digital microphone.With digital wheat in the present embodiment
It is described as a example by gram wind.
In one example, preamplifier 10 can include audio-frequency amplifier or one or two
Other amplifiers above.Audio-frequency amplifier or one or more other amplifiers are from Mike
Wind receives sensing signal (for example, audio output etc.), and provides sense to follow-up signal processing circuit
Survey signal (for example, amplified audio signal etc.).
Temperature sensor 20, the ambient temperature signal for obtaining the external sensor, wherein,
The temperature signal variation with temperature monotonic increase or monotone decreasing.
In the present embodiment, the temperature sensor is arranged near the preamplifier.Temperature
Sensor 20 is used to obtain the ambient temperature signal of external sensor, in order to obtain more accurate temperature
Signal, then temperature sensor 20 must be at the core position of microphone.Due to preamplifier
10 receive sensing signal from external sensor, then preamplifier 10 is close apart from external sensor.
When temperature sensor 20 is placed near preamplifier 10, more accurate temperature can be obtained
Signal.In operating temperature range (- 20 DEG C~50 DEG C), temperature signal is linearly related to temperature.Temperature
Degree signal is that voltage signal is corresponded with environment temperature.The temperature coefficient of the temperature signal is equal to
The temperature coefficient of the sensing signal.In one example, the temperature sensor 20 with it is described before
The distance between grade amplifier 10 d is put less than 2mm.
Temperature-compensation circuit 30, is carried out for being obtained according to the temperature signal to the sensing signal
The thermal compensation signal of compensation.
Analog-digital converter 50, for receiving the sensing signal after amplifying from the preamplifier 10
And receive thermal compensation signal from the temperature-compensation circuit 30.
In the present embodiment, temperature-compensation circuit 30 is connected with the temperature sensor 20, receives
The temperature signal that the temperature sensor 20 sends, and obtained to the sense according to the temperature signal
Survey the thermal compensation signal that signal is compensated.
In one example, the temperature compensation means also includes control module 40, is connect for basis
The control signal for receiving controls the temperature-compensation circuit to provide thermal compensation signal to analog-digital converter 50
Or thermal compensation signal is not provided.
In one example, the temperature-compensation circuit includes multiple temperature compensation modules, the control
Molding block 40 controls the multiple temperature compensation module to turn to modulus according to the control signal for receiving
Parallel operation 50 provides thermal compensation signal or does not provide thermal compensation signal.
In the present embodiment, temperature range is often used for microphone, it is preset in temperature-compensation circuit
Multiple temperature compensation modules, the compensating form of each temperature compensation module is different, according to what is received
Control signal controls the preset compensation of multiple temperature compensation modules or uncompensation.Preset compensation mould
Type is to set up external sensor (such as microphone) output and temperature sensor output (i.e. temperature signal)
Between relation.
According to the temperature compensation means provided by the present invention for external sensor by temperature sensor
It is arranged near the preamplifier, more accurately obtains the ambient temperature signal of external sensor,
And the sensing signal that external sensor is exported is compensated according to the temperature signal, improve temperature
The precision of compensation.
Fig. 3 is the temperature compensation for external sensor for providing according to embodiments of the present invention
Flow chart.The temperature compensation for external sensor is comprised the following steps.
In step S301, preamplifier obtains the sensing signal of the external sensor.
In step s 302, temperature sensor obtains the ambient temperature signal of external sensor, its
In, the temperature sensor is arranged near the preamplifier.
In step S303, temperature-compensation circuit is obtained to sensing signal according to the temperature signal
The thermal compensation signal for compensating.
In a preferred embodiment, the temperature compensation also includes step S304.
In step s 304, control module controls the temperature to mend according to the control signal for receiving
Circuit is repaid to provide thermal compensation signal to signal processing circuit or thermal compensation signal is not provided.
According to the temperature compensation provided by the present invention for external sensor, before being arranged on
The temperature sensor near amplifier is put, the ambient temperature signal of external sensor is more accurately obtained,
And the sensing signal that external sensor is exported is compensated according to the temperature signal, improve temperature
The precision of compensation.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for this
For art personnel, the present invention can have various changes and change.It is all in spirit of the invention
With any modification, equivalent substitution and improvements made within principle etc., should be included in of the invention
Within protection domain.
Claims (10)
1. a kind of temperature compensation means for external sensor, including：
Preamplifier, for receiving sensing signal from the external sensor；
Temperature sensor, the ambient temperature signal for obtaining the external sensor, wherein, institute
State temperature signal variation with temperature monotonic increase or monotone decreasing；
Temperature-compensation circuit, mends for being obtained according to the temperature signal to the sensing signal
The thermal compensation signal repaid；
Wherein, the temperature sensor is arranged near the preamplifier.
2. temperature compensation means according to claim 1, wherein, the external sensor
It is MEMS or ECM devices.
3. temperature compensation means according to claim 1, wherein, the temperature sensor
2mm is less than with the distance between pre-stage amplifiers.
4. temperature compensation means according to claim 1, wherein, the temperature-compensating dress
Putting also includes：
Control module, for controlling the temperature-compensation circuit to letter according to the control signal for receiving
Number process circuit provides thermal compensation signal or does not provide thermal compensation signal.
5. temperature compensation means according to claim 4, wherein, the temperature-compensating electricity
Road also includes multiple temperature compensation modules, and the control module is according to the control signal control for receiving
The multiple temperature compensation module provides thermal compensation signal or does not provide compensation letter to signal processing circuit
Number.
6. temperature compensation means according to claim 1, also includes：
Analog-digital converter, for from the preamplifier receive amplify after sensing signal and from
The temperature-compensation circuit receives thermal compensation signal.
7. temperature compensation means according to claim 6, the temperature compensation means is also wrapped
Include：
Control module, for controlling the temperature-compensation circuit to institute according to the control signal for receiving
Analog-digital converter is stated thermal compensation signal to be provided or thermal compensation signal is not provided.
8. temperature compensation means according to claim 7, wherein, the temperature-compensating electricity
Road also includes multiple temperature compensation modules, and the control module is according to the control signal control for receiving
The multiple temperature compensation module provides thermal compensation signal or does not provide compensation to the analog-digital converter
Signal.
9. a kind of temperature compensation for external sensor, including：
Preamplifier obtains the sensing signal of the external sensor；
Temperature sensor obtains the ambient temperature signal of external sensor, wherein, the TEMP
Device is arranged near the preamplifier, the temperature signal variation with temperature monotonic increase or
Monotone decreasing；
Temperature-compensation circuit obtains the compensation compensated to sensing signal according to the temperature signal
Signal.
10. temperature compensation according to claim 9, wherein, also include：
Control module according to the control signal that receives control the temperature-compensation circuit to signal at
Reason circuit provides thermal compensation signal or does not provide thermal compensation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018818.7A CN106937207A (en) | 2015-12-29 | 2015-12-29 | For the temperature compensation means and method of external sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018818.7A CN106937207A (en) | 2015-12-29 | 2015-12-29 | For the temperature compensation means and method of external sensor |
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| CN106937207A true CN106937207A (en) | 2017-07-07 |
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| CN201511018818.7A Pending CN106937207A (en) | 2015-12-29 | 2015-12-29 | For the temperature compensation means and method of external sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107588865A (en) * | 2017-10-23 | 2018-01-16 | 盐城工学院 | Temperature collection circuit and Optical Receivers |
| CN111855019A (en) * | 2020-07-27 | 2020-10-30 | 歌尔科技有限公司 | Temperature measuring method and device, wrist-worn equipment and storage medium |
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Effective date of registration: 20180719 Address after: 261000 Fengshan Road, Fangzi District, Weifang, Shandong Province, No. 68 Applicant after: Shandong Gettop Acoustic Co.,Ltd. Address before: 100191 Beijing Haidian District Zhichun Road 23 quantum Ginza 1002 room Applicant before: Beijing Acuti Microsystems Co., Ltd. |
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