CN102761816B - Testing circuit, testing device and testing method of Bluetooth earphone Don and Doff function - Google Patents
Testing circuit, testing device and testing method of Bluetooth earphone Don and Doff function Download PDFInfo
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- CN102761816B CN102761816B CN201210213061.7A CN201210213061A CN102761816B CN 102761816 B CN102761816 B CN 102761816B CN 201210213061 A CN201210213061 A CN 201210213061A CN 102761816 B CN102761816 B CN 102761816B
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Abstract
The invention provides a testing circuit, a testing device and a testing method of a Bluetooth earphone Don and Doff function. The testing circuit comprises at least one testing electrode and a same-direction voltage following circuit which is connected with the testing electrode; the same-direction voltage following circuit comprises a variable capacitance diode and an excitation signal generator; and one of the variable capacitance diode is connected with the testing electrode, and the other end of the variable capacitance diode is connected with the excitation signal generator. According to the testing circuit of the Bluetooth earphone Don and Doff function, provided by the invention, an inductive curve of each earphone can be determined by matching corresponding testing software, sample curves and limit can be formulated according to batch testing data, a volume production earphone curve is set between limit curves, and thus the consistency requirements are considered to be met, and the testing method is direct and simple and is convenient to implement.
Description
Technical field
The present invention relates to bluetooth earphone technical field, more specifically, relate to a kind of bluetooth earphone Don & Doff functional test circuit and testing apparatus and method of testing thereof.
Background technology
Bluetooth is a kind of short-distance wireless communication technology of low cost low-power consumption.Popularizing along with blue tooth products and applications of wireless technology in recent years, bluetooth earphone become at present most widely used in daily life Bluetooth technology, by bluetooth earphone, cellphone subscriber can realize wireless handsfree function, and needn't hang down from the head as it is single line to mobile phone.
At present bluetooth earphone Don/Doff function (be whether the automatic detection of earphone is worn on ear, enter holding state while putting on, enter low power consumpting state after taking) is more and more general, can extend the earphone operating time, simplifies and the function such as answers.
The introducing of the new function of Don/Doff, make bluetooth earphone before dispatching from the factory, need to increase the test to this function, but existing method of testing adopts the methods such as metal frock, earphone is judged to whether earphone responds to confirm whether Don/Doff function can be used during near frock, but cannot weigh for the problem such as sensitivity, consistency of this function.This conforming method of testing that has or not, cannot ensure this function that can only simple test Don/Doff function can not meet the demand of production firm to bluetooth earphone Don/Doff functional test far away.
Summary of the invention
In view of the above problems, the object of this invention is to provide a kind of bluetooth earphone Don & Doff functional test circuit, testing apparatus and method of testing thereof, by the electrode of particular design, people's ear and the impact of facial skin on bluetooth earphone when simulation bluetooth earphone is worn on ear, thus determine that test limit guarantees the shipment consistency of Don & Doff function.
To achieve these goals, bluetooth earphone Don & Doff functional test circuit provided by the invention comprises at least one test electrode and the voltage follower circuit being in the same way connected with described test electrode; Described voltage follower circuit in the same way comprises variable capacitance diode and excitation signal generator; One end of described variable capacitance diode is connected with described test electrode, and the other end is connected with excitation signal generator.
In addition, preferred structure is, the capacitance sensor of described test electrode and described bluetooth earphone is used in combination, in the time of Don/Doff bluetooth earphone that described bluetooth earphone is two-capacitance sensor, described test electrode is two, comprise " U " font electrode and a figure of eight electrode, described voltage follower circuit is in the same way two-way; In the time that described bluetooth earphone is single capacitor transducer bluetooth earphone, described test electrode is one, the described Wei Yi of voltage follower circuit in the same way road.
In addition, preferably structure is, described test electrode is realized by PCB copper sheet, and figure of eight electrode is wherein used for simulating facial skin, and " U " font electrode is used for simulating people's ear.
On the other hand, the present invention also provides a kind of bluetooth earphone Don & Doff device for testing functions that comprises test fixture and aforementioned bluetooth earphone Don & Doff functional test circuit, wherein, described test fixture is for fixing bluetooth earphone to be tested, and the test electrode of described bluetooth earphone functional test circuit is placed on by the position of the capacitance sensor of close described bluetooth earphone on described test fixture.
On the one hand, the present invention also provides a kind of bluetooth earphone Don & Doff function test method, comprising again:
The capacitance sensor of described bluetooth earphone is pressed close to the test electrode of bluetooth earphone Don & Doff functional test circuit, wherein, described test circuit also comprises the voltage follower circuit being in the same way connected with described test electrode, described voltage follower circuit in the same way comprises variable capacitance diode and excitation signal generator, one end of described variable capacitance diode is connected with described test electrode, and the other end is connected with excitation signal generator;
By described excitation signal generator, the end in the same way of described variable capacitance diode is applied to sawtooth pumping signal;
Record the test curve of the capacitance sensor of described bluetooth earphone;
Obtain the Don & Doff functional test results of described bluetooth earphone by comparing described test curve and Spectrum Sample Curve.
Wherein, preferably scheme is, by described excitation signal generator, the end in the same way of described variable capacitance diode is being applied after sawtooth pumping signal,
Described variable capacitance diode both end voltage is followed the variation of pumping signal and is changed, electric charge on the test electrode that makes to be connected with described variable capacitance diode one end changes, in the time that bluetooth earphone capacitance sensor is pressed close to electrode, the induction curve of bluetooth earphone capacitance sensor changes.
Adopt after bluetooth earphone Don & Doff functional test circuit provided by the invention and testing apparatus, coordinate corresponding testing software, can determine every earphone induction curve, formulate Spectrum Sample Curve and limit according to batch testing data, volume production earphone test curve, between limit curve, is thought and is met coherence request.Method of testing is intuitively easy, is convenient to implement.
Brief description of the drawings
By reference to the content below in conjunction with the description of the drawings and claims, and along with understanding more comprehensively of the present invention, other object of the present invention and result will be understood and easy to understand more.In the accompanying drawings:
Fig. 1 is the test circuit schematic diagram according to the embodiment of the present invention;
Fig. 2 is " U " font electrode schematic diagram according to the embodiment of the present invention;
Fig. 3 is the figure of eight electrode schematic diagram according to the embodiment of the present invention;
Fig. 4 is the method flow schematic diagram that carries out bluetooth earphone Don & Doff functional test according to test circuit provided by the invention.
In institute's drawings attached, identical label is indicated similar or corresponding feature or function.
Embodiment
Below with reference to accompanying drawing, specific embodiments of the invention are described in detail.
The technical solution used in the present invention is, the electrode by particular design also coordinates variable capacitance diode simulation people's ear and facial skin, by test circuit, electrode carried out to cycle charge-discharge and simulates earphone and put on and the state of taking.Test circuit provided by the invention comprises at least one test electrode and the voltage follower circuit being in the same way connected with test electrode, voltage follower circuit mainly comprises variable capacitance diode and excitation signal generator in the same way, wherein, one end of variable capacitance diode is connected with described test electrode, and the other end is connected with excitation signal generator.
Fig. 1 is the test circuit schematic diagram according to the embodiment of the present invention.Test circuit shown in Fig. 1 be for two-capacitance sensor bluetooth earphone design there is two test electrodes and the two-way test circuit of voltage follower circuit in the same way, to test the induction curve of two capacitance sensors in two-capacitance sensor bluetooth earphone.
Wherein, in a specific embodiment of the present invention, two test electrodes are the test electrode with special shape design as shown in Figures 2 and 3.
Utilize the test circuit shown in Fig. 1, by two capacitance sensors of two-capacitance sensor bluetooth earphone respectively near two test electrodes, two test electrodes respectively with two-way in the same way the variable capacitance diode of voltage follower circuit be connected.By excitation signal generator, the end in the same way of variable capacitance diode is applied to sawtooth pumping signal, variable capacitance diode both end voltage is followed pumping signal and is changed, make diode body capacitance respective change, because the electrode of particular design and one end of variable capacitance diode are directly connected, the capacitance that therefore electric charge on electrode is also followed diode changes.In the time that bluetooth earphone capacitance sensor is pressed close to electrode, the induction curve of capacitance sensor changes, thereby obtains the induction curve of bluetooth earphone.
The core of above-mentioned test circuit be the use of variable capacitance diode and with the coordinating of electrode, those skilled in the art should know, the computing circuit of other form also can be realized this function coordinating after variable capacitance diode and suitable electrode.
Fig. 2 and Fig. 3 are respectively according to " U " font of the embodiment of the present invention and figure of eight electrode schematic diagram.
As shown in Figures 2 and 3, " U " font and figure of eight electrode are realized by PCB copper sheet.For the Don/Doff bluetooth earphone of two-capacitance sensor, often a transducer is positioned over MIC end, press close to facial skin, another transducer is placed in Ren Erchu, therefore, in test circuit, corresponding figure of eight electrode is used for simulating facial skin, and " U " font electrode is used for simulating people's ear.
The bluetooth earphone of two-capacitance sensor can effectively be avoided the misoperation of Don/Doff function, is current conventional bluetooth earphone.For single capacitor transducer or many capacitance sensors bluetooth earphone, its Don/Doff functional test circuit is also similar, only need to adopt one or more voltage follower circuit in Fig. 1, PCB copper sheet test electrode also can be selected certain test electrode in Fig. 1 according to earphone sensing station, single capacitor transducer earphone can reduce costs on the basis that retains Don/Doff function, and many capacitance sensors can minimize misoperation probability.
Accordingly, utilize method flow that above-mentioned test circuit carries out bluetooth earphone Don & Doff functional test as shown in Figure 4, comprise the steps:
S410: the test electrode of the capacitance sensor of bluetooth earphone to be tested being pressed close to test circuit;
S420: the end in the same way of variable capacitance diode is applied to sawtooth pumping signal by excitation signal generator;
S430: the test curve that records the capacitance sensor of bluetooth earphone to be tested;
S440: the Don & Doff functional test results that obtains bluetooth earphone to be tested by contrastive test curve and Spectrum Sample Curve.
Wherein, by stating excitation signal generator, the end in the same way of variable capacitance diode is being applied after sawtooth pumping signal, variable capacitance diode both end voltage is followed the variation of pumping signal and is changed, electric charge on the test electrode that makes to be connected with variable capacitance diode one end changes, in the time that bluetooth earphone capacitance sensor is pressed close to electrode, the induction curve of bluetooth earphone capacitance sensor changes.
In addition, for the convenience of testing, be preferably in the identical simple frock of the front making of bluetooth earphone test and bluetooth earphone shape to be tested and fix earphone, frock is equivalent to earphone bracket, PCB electrode (single-sensor or multisensor bluetooth earphone frock only need be reserved respective numbers electrode position) is placed in the position of reserved two close earphone transducers, make after earphone is placed in frock, MIC place transducer is near figure of eight electrode, and SPK place transducer is near " U " font electrode.
Accordingly, the present invention also provides a kind of bluetooth earphone Don & Doff device for testing functions that comprises above-mentioned test fixture and aforementioned bluetooth earphone Don & Doff functional test circuit, wherein, institute's test fixture is for fixing bluetooth earphone to be tested, and the test electrode of bluetooth earphone functional test circuit is placed on by the position of the capacitance sensor of close bluetooth earphone on described test fixture.
Bluetooth earphone to be tested is being placed into behind the position that test fixture is corresponding, just can apply pumping signal to test circuit by excitation signal generator, testing software reads the induction curve of the capacitance sensor of bluetooth earphone, can obtain earphone Don/Doff function curve, contrast the definite limit of standard specimen earphone Don/Doff function curve, thereby judge the consistency of this Don/Doff function.
Describe according to Don & Doff functional test circuit of the present invention, testing apparatus and method of testing thereof in the mode of example above with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the Don & Doff functional test circuit, testing apparatus and the method for testing thereof that propose for the invention described above, can also on the basis that does not depart from content of the present invention, make various improvement.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (6)
1. a bluetooth earphone Don & Doff functional test circuit, described bluetooth earphone Don & Doff function comprises: whether the automatic detection of earphone is worn on ear, enters holding state while putting on, after taking, enters low power consumpting state, wherein
Described test circuit comprises at least one test electrode and the voltage follower circuit being in the same way connected with described test electrode;
Described voltage follower circuit in the same way comprises variable capacitance diode and excitation signal generator;
One end of described variable capacitance diode is connected with described test electrode, and the other end is connected with excitation signal generator.
2. bluetooth earphone Don & Doff functional test circuit as claimed in claim 1, wherein,
The capacitance sensor of described test electrode and described bluetooth earphone is used in combination, in the time of Don/Doff bluetooth earphone that described bluetooth earphone is two-capacitance sensor, described test electrode is two, comprise " U " font electrode and a figure of eight electrode, described voltage follower circuit is in the same way two-way; In the time that described bluetooth earphone is single capacitor transducer bluetooth earphone, described test electrode is one, the described Wei Yi of voltage follower circuit in the same way road.
3. bluetooth earphone Don & Doff functional test circuit as claimed in claim 2, wherein,
Described test electrode is realized by PCB copper sheet, and figure of eight electrode is wherein used for simulating facial skin, and " U " font electrode is used for simulating people's ear.
4. a bluetooth earphone Don & Doff device for testing functions, comprises test fixture and the bluetooth earphone Don & Doff functional test circuit as described in any one in claim 1～3, wherein,
Described test fixture is for fixing bluetooth earphone to be tested, and the test electrode of described bluetooth earphone functional test circuit is placed on the reserved location of the capacitance sensor of close described bluetooth earphone on described test fixture.
5. a bluetooth earphone Don & Doff function test method, described bluetooth earphone Don & Doff function comprises: whether the automatic detection of earphone is worn on ear, while putting on, enter holding state, after taking, enter low power consumpting state, described method comprises:
The capacitance sensor of described bluetooth earphone is pressed close to the test electrode of bluetooth earphone Don & Doff functional test circuit, wherein, described test circuit also comprises the voltage follower circuit being in the same way connected with described test electrode, described voltage follower circuit in the same way comprises variable capacitance diode and excitation signal generator, one end of described variable capacitance diode is connected with described test electrode, and the other end is connected with excitation signal generator;
By described excitation signal generator, the end in the same way of described variable capacitance diode is applied to sawtooth pumping signal;
Record the test curve of the capacitance sensor of described bluetooth earphone;
Obtain the Don & Doff functional test results of described bluetooth earphone by comparing described test curve and Spectrum Sample Curve.
6. bluetooth earphone Don & Doff function test method as claimed in claim 5, wherein, is applying after sawtooth pumping signal the end in the same way of described variable capacitance diode by described excitation signal generator,
Described variable capacitance diode both end voltage is followed the variation of pumping signal and is changed, electric charge on the test electrode that makes to be connected with described variable capacitance diode one end changes, in the time that bluetooth earphone capacitance sensor is pressed close to electrode, the induction curve of bluetooth earphone capacitance sensor changes.
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| US10045111B1 (en) | 2017-09-29 | 2018-08-07 | Bose Corporation | On/off head detection using capacitive sensing |
| US10257602B2 (en) | 2017-08-07 | 2019-04-09 | Bose Corporation | Earbud insertion sensing method with infrared technology |
| US10334347B2 (en) | 2017-08-08 | 2019-06-25 | Bose Corporation | Earbud insertion sensing method with capacitive technology |
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| US9854372B2 (en) * | 2015-08-29 | 2017-12-26 | Bragi GmbH | Production line PCB serial programming and testing method and system |
| US10812888B2 (en) | 2018-07-26 | 2020-10-20 | Bose Corporation | Wearable audio device with capacitive touch interface |
| US10462551B1 (en) | 2018-12-06 | 2019-10-29 | Bose Corporation | Wearable audio device with head on/off state detection |
| US11275471B2 (en) | 2020-07-02 | 2022-03-15 | Bose Corporation | Audio device with flexible circuit for capacitive interface |
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| CN102761816A (en) | 2012-10-31 |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |