CN102322928A - Electronic scale, mobile equipment, body weight measuring system and wireless transmission method - Google Patents
Electronic scale, mobile equipment, body weight measuring system and wireless transmission method Download PDFInfo
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- CN102322928A CN102322928A CN201110160098A CN201110160098A CN102322928A CN 102322928 A CN102322928 A CN 102322928A CN 201110160098 A CN201110160098 A CN 201110160098A CN 201110160098 A CN201110160098 A CN 201110160098A CN 102322928 A CN102322928 A CN 102322928A
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Abstract
The invention belongs to the technical field of measurement of human body weight, relating to an electronic scale. The electronic scale comprises a device main body, a body weight measuring unit, a body weight data memory unit, a conversion unit and an audio transmitting unit, wherein the conversion unit is used for carrying out DTMF (Dual-Tone Multi-Frequency) audio decoding on body weight data in the memory unit, converting the decoded body weight data into corresponding DTMF audio data and outputting the DTMF audio data; and the audio transmitting unit is used for converting the DTMF audio data output by the conversion unit into a sound signal carrying DTMF audio information and transmitting the sound signal. The invention simultaneously provides mobile equipment which can wirelessly communicate with the electronic scale; and by integrating hardware equipment, the invention also provides a body weight measuring system comprising the electronic scale and the mobile equipment as well as a body weight data wireless transmission method. According to the invention, an expensive wireless communication module is avoided, thus the cost is reduced; meanwhile, the reliability of data transmission is ensured and the convenience for users is realized.
Description
Technical field
The present invention relates to electronic scales, particularly relate to the method that the electronic scales measurement data is transmitted and received.
Background technology
Present electronic scales adopts sensor and single-chip microcomputer to accomplish the measurement of human body body weight more, and shows measurement result through LCD display, add up and further analyze but can't keep a record to individual measured body weight result,
For this reason; CN201666812 discloses a kind of through the electronic scales with wave point of wirelessly transmitting data to computing machine; Realize that through bluetooth transceiver or 2.4G wireless transceiver wireless weight data is uploaded on computer and the internet, so that the permanent preservation and the analysis of individual health data.
Though above technical scheme is brought certain convenience to the gauger, not enough below also existing in using: needing increases communication module, thereby has increased the cost of product; Need during use device is matched authentication, increased operation easier.
In the known techniques, DTMF is widely used in telephone field, is to be medium with the telephone network basically but dtmf signal sends with receiving, i.e. telephone wire, antenna, and electromagnetic wave is a carrier, not having with sound is the application of the short-range data transmission of media implementation.
Summary of the invention
The technical matters that the present invention will solve is to overcome above-mentioned defective and the technological prejudice that known technology exists, and a kind of electronic scales measurement data short range wireless transmission and method of reseptance and electronic scales and mobile device in order to realize this method are provided; And the measured body weight system that forms by electronic scale and mobile device; Thereby realize the management and the analysis of measurement data, and data transmission is reliable, simple in structure; With low cost, offer convenience to the gauger.
The present invention realizes through following technical scheme, according to a kind of electronic scales provided by the invention, comprising:
Apparatus main body;
The measured body weight module is used to measure the human body weight data;
Storage unit is used to store the weight data that measures;
Wherein, also comprise:
Converting unit is used for weight data with storage unit and carries out dtmf tone and encode frequently, converts corresponding dtmf tone audio data and output into;
The audio frequency transmitting element, be used for dtmf tone audio data with converting unit output convert into carry dtmf tone frequently information voice signal and send.
The present invention can also take following technical scheme further to realize:
Above-mentioned electronic scales, wherein, described audio frequency transmitting element comprises block isolating circuit, driving circuit and the loudspeaker that links to each other successively, described block isolating circuit links to each other with the output terminal of converting unit;
Above-mentioned electronic scales, wherein, described loudspeaker places apparatus main body inner, and towards the upper surface of apparatus main body, corresponding apparatus main body surface has aperture;
Above-mentioned electronic scales, wherein, described audio frequency transmitting element is play time >=55 millisecond of a dtmf tone, and sets quiet time of one >=60 milliseconds and separate two continuous dtmf tones.Preferable, the time that the audio frequency transmitting element is play a dtmf tone is 100 milliseconds, and setting is separated two continuous dtmf tones with 120 milliseconds quiet time.
The present invention provides a kind of and above-mentioned electronic scales matching used mobile device simultaneously; Comprise audio frequency receiving element, decoding unit and measurement data storage unit; Wherein, described audio frequency receiving element is used to receive the voice signal that carries dtmf tone frequency information that is sent by electronic scales; Described decoding unit is used for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element receives is decoded, and converts corresponding weight data into.
As preferred implementation, above-mentioned mobile device, wherein, described mobile device is the mobile phone that has sound-recording function, the recording unit that described audio frequency receiving element is a mobile phone;
Above-mentioned mobile device, wherein, described decoding unit comprises:
Decoding program starts module, after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoder module according to predetermined decoding program decoding N time, obtains N data to each voice signal that carries dtmf tone frequency information that continues;
The valid data judge module, the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops module, stops when the valid data number that obtains reaches the decoding of data designated quantity.
Above-mentioned mobile device; Wherein, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
The present invention also provides a kind of weight data radio transmitting method, is applied to the measured body weight system that is made up of electronic scales and mobile device, wherein, comprises the following steps:
(1) by electronic scales weight data is encoded, convert thereof into the dtmf tone audio data;
(2) electronic scales with the dtmf tone audio data with carry dtmf tone frequently the form of the voice signal of information send;
(3) receive the voice signal that carries dtmf tone frequency information by mobile device;
(4) voice signal that carries dtmf tone frequency information is decoded, convert corresponding weight data into.
As preferred implementation, above-mentioned weight data radio transmitting method, wherein, in (4) step, decode procedure specifically comprises:
Decoding program starts, and after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoding according to predetermined decoding program decoding N time, obtains N data to each dtmf tone audio data that continues;
Valid data judge that the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops, and stops when the valid data number that obtains reaches the decoding of data designated quantity.
Above-mentioned weight data radio transmitting method; Wherein, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
The comprehensive above-mentioned hardware device of the present invention proposes a kind of measured body weight system simultaneously, comprises electronic scales and mobile device, and wherein, described electronic scales comprises:
Apparatus main body;
The measured body weight module is used to measure the human body weight data;
Storage unit is used to store the weight data that measures;
Converting unit is used for weight data with storage unit and carries out dtmf tone and encode frequently, converts corresponding dtmf tone audio data and output into;
The audio frequency transmitting element, be used for dtmf tone audio data with converting unit output convert into carry dtmf tone frequently information voice signal and send;
Described mobile device comprises: audio frequency receiving element, decoding unit, and the measurement data storage unit, described audio frequency receiving element is used to receive the voice signal that carries dtmf tone frequency information that is sent by electronic scales; Described decoding unit is used for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element receives is decoded, and converts corresponding weight data into.
As preferred implementation, described mobile device is the mobile phone that has sound-recording function, and described receiving element is the recording unit of mobile phone.
Above-mentioned measured body weight system, wherein, described decoding unit comprises:
Decoding program starts module, after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoder module according to predetermined decoding program decoding N time, obtains N data to each voice signal that carries dtmf tone frequency information that continues;
The valid data judge module, the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops module, stops when the valid data number that obtains reaches the decoding of data designated quantity.
Above-mentioned measured body weight system; Wherein, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
In a word, through above structure and method, the present invention compared with prior art has following advantage at least:
Avoided expensive wireless communication module, reduced cost, guaranteed reliability of data transmission simultaneously, brought facility to the gauger.Preferred embodiment of the present invention, the sound pick-up outfit that utilizes mobile phone all to have is realized wireless telecommunications, under the situation that does not increase hardware cost, both can realize the reliable transmission of data.In addition, through the voice signal that carries dtmf tone frequency information is carried out DFT, the gain and the gain of 2 subharmonic that obtain the corresponding frequency of DTMF are compared with the difference preset threshold, judge that whether frequency point data is interfering data, reaches jamproof purpose.Because compared to traditional application and the technology of the DTMF in the wire-telephony; Dtmf signal of the present invention sends and reception is to be medium with sound; Be easy to receive stronger environment sound and voice and disturb, decode N time according to predetermined decoding program through the voice signal that carries dtmf tone frequency information that each is continued, the number of the identical data position that decoding obtains is then confirmed as the judgment mode of valid data greater than preset value M; Further improve antijamming capability, guarantee the accuracy of decoding.
Description of drawings
Fig. 1 is the illustrative view of functional configuration of electronic scales of the present invention;
Fig. 2 is the illustrative view of functional configuration of mobile device of the present invention;
Fig. 3 carries out the fundamental diagram of radio communication for electronic scales of the present invention and mobile device;
Fig. 4 is the schematic appearance of measured body weight of the present invention system;
Fig. 5 is the mobile device decoding process figure of preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment,, specify as follows structure of the present invention, characteristic and effect thereof:
As shown in Figure 1, the present invention provides a kind of electronic scales 100, comprising:
Measured body weight unit 1 is used to measure the human body weight data;
Converting unit 3 is used for the weight data of storage unit is encoded, and converts corresponding dtmf tone audio data into;
Audio frequency transmitting element 4, the DTMF speech data that is used for converting unit is converted to converts sound signal into.
Preferable, above-mentioned electronic scales, wherein said converting unit comprises:
Storing sub-units 31 is used to store the dtmf tone audio data that records;
Preferable, aforesaid electronic scales, wherein, the time that described audio frequency transmitting element is play a dtmf tone is 100 milliseconds, and separates two continuous dtmf tones with 120 milliseconds quiet.
As shown in Figure 2, the present invention also provides a kind of mobile device 200, comprising:
Audio frequency receiving element 5 is used to receive the voice signal that carries dtmf tone frequency information that scale sends;
Decoding unit 6 is used for the voice signal that carries dtmf tone frequency information that said audio frequency receiving element receives is decoded, and converts corresponding weight data into.
Measurement data storage unit 7 is used to store the weight data after decoding unit transforms;
Preferable, aforesaid mobile device also comprises a data processing unit 8, is used for physiological parameter is done further health analysis;
Preferable, above-mentioned mobile device, wherein, described mobile device is the mobile phone that has sound-recording function, the recording unit 9 that described audio frequency receiving element is a mobile phone;
Preferable, aforesaid mobile device, wherein, described decoding unit comprises:
Decoding program starts module 61, after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
Voice data decoder module 62 according to predetermined decode time decoding N time, obtains N data to each dtmf tone audio data that continues;
Valid data judge module 63, the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops module 64, stops when the valid data number that obtains reaches the decoding of data designated quantity.
Above-mentioned mobile device; Wherein, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
The present invention utilizes electronic scales and mobile device to realize a kind of weight data radio transmitting method, comprises the following steps:
(1) by electronic scales weight data is encoded, convert thereof into the dtmf tone audio data;
(2) electronic scales with the dtmf tone audio data with carry dtmf tone frequently the form of the voice signal of information send;
(3) receive the voice signal that carries dtmf tone frequency information by mobile device;
(4) mobile device is decoded to the voice signal that carries dtmf tone frequency information, converts corresponding weight data to.
Specifically describe as follows below in conjunction with preferred embodiment:
Referring to Fig. 3, Fig. 4, audio frequency transmitting element of the present invention comprises block isolating circuit 11, loudspeaker driving circuit 12 and loudspeaker 13 several sections that connect successively.Can in advance the DTMF voice document that records be stored in single-chip microcomputer 10 (being CPU among the figure) inside; It is the storing sub-units of aforesaid converting unit; The dtmf tone audio data that converting unit is converted to by the output of the I0 mouth of single-chip microcomputer after, through the audio frequency transmitting element convert into carry dtmf tone frequently information voice signal and send.
Preferable, described loudspeaker places apparatus main body inner, and towards the upper surface of apparatus main body, corresponding apparatus main body surface has aperture 14; Adopt this to be provided with and be beneficial to the sound pick-up outfit collection of recording.
The concrete following (see figure 4) of principle of work:
Suppose that the given transmission data bulk is N (weight data is defined as 4 figure places in the present embodiment, i.e. the transmission data bulk of XXX.X, so appointment is set to 4);
After single-chip microcomputer 10 receives the measurement data of measured body weight unit 1 acquisition; Data are read in the storage unit 2; The converse routine of operation converting unit 3; The data-switching that receives is become corresponding dtmf tone audio data, and single-chip microcomputer 10 is that the PWM ripple of 32khz sends to block isolating circuit 11 with data through the I0 mouth with the cycle then, is undertaken passing to loudspeaker driving circuit 12 parts after the filtering by 11 pairs of data of block isolating circuit; Data are amplified, then through loudspeaker 13 will carry dtmf tone frequently the voice signal of information send.Playing one, to represent time of dtmf tone of numeral be 100 milliseconds, and utilizing the duration is that 120 milliseconds quiet separated two continuous dtmf tone data.Defining a dtmf tone is start bit, at first plays this data bit before the played data.
The mobile device 200 of the embodiment of the invention is a mobile phone; Mobile phone need be opened the sound pick-up outfit 9 that carries before receiving, mobile phone utilizes sound pick-up outfit 9 to receive voice document, and the recording sampling rate is 8KHZ; After receiving the start bit voice; Data after the opening entry also start decoding program, set the data window of 136 points, and 11 pairs of follow-up datas of decoding program are decoded.
When the voice signal that carries dtmf tone frequency information of 200 pairs of receptions of mobile device is decoded; At first the voice signal that carries dtmf tone frequency information that receives is carried out DFT; Parse the gain A u and the 2 subharmonic gain A uh of the corresponding frequency of dtmf tone; According to the external environment setting threshold,, then be judged to be valid data if gain A u surpasses threshold value.In addition, because the mankind comprise abundant harmonic wave in a minute, there is a strong possibility produces interference on the corresponding frequency of dtmf tone; Through judging whether the corresponding frequency of dtmf tone has stronger second harmonic gain; Judge that this frequency is that valid data or voice disturb, setting threshold in view of the above is if harmonic wave surpasses setting threshold; Explain the voice that come from the outside do around, then this point data is rejected.Reach jamproof purpose through this method.
Above-mentioned decoding is accomplished needs 17ms approximately; Therefore the dtmf tone of 1 lasting 100ms can be decoded and obtained 5 data bit; If identical data is more than or equal to 3 then think that the data that the dtmf tone of this lasting 100ms loads are these identical datas in 5 data, so just further played jamproof effect.Mobile phone receives data designated quantity (in the present embodiment being 4), stops to receive data, and decoding stops.Concrete reception flow process is as shown in Figure 5.Reception finishes after the data, and data will be stored in the measurement data storage unit 7 of mobile device.After the data processing unit 8 of mobile device can use specific data processing software to carry out secondary treating to these data, through output devices such as display screen, loudspeakers, with vision, means such as the sense of hearing passed to the user.
The time and the quiet time of playing a dtmf tone need not stick to above-mentioned parameter, can revise, and for example, the time of playing a dtmf tone is 55 milliseconds, and utilizing the duration is that 60 milliseconds quiet separated two continuous dtmf tone data.Defining a dtmf tone is start bit, at first plays this data bit before the played data.Mobile device 200 need be opened sound pick-up outfit 9 before receiving; The mobile device end utilizes sound pick-up outfit 9 to receive voice document; After receiving the start bit voice; 6 pairs of follow-up datas of decoding unit are decoded, and the time of a speech data of decoding is 17ms, and the dtmf tone of 1 lasting 55ms can be decoded and obtained 3 data bit; If identical data is more than or equal to 2 then think that the data that the dtmf tone of this lasting 55ms loads are these identical datas in 3 data, further strengthen anti-jamming capacity.
Present embodiment adopts the standard dtmf code, in actual the use, also can self-defining non-standard dtmf code, and coding schedule is as shown in the table, first row contains high-frequency audio and first column contains low frequency audio frequency.
The above only is preferred embodiment of the present invention, and every foundation technical scheme of the present invention all belongs to the scope of the present invention's protection to any simple modification and equivalents that above embodiment carries out.
Claims (16)
1. electronic scales comprises:
Apparatus main body;
The measured body weight unit is used to measure the human body weight data;
Storage unit is used to store the weight data that measures;
It is characterized in that, also comprise:
Converting unit is used for weight data with storage unit and carries out dtmf tone and encode frequently, converts corresponding dtmf tone audio data and output into;
The audio frequency transmitting element, be used for dtmf tone audio data with converting unit output convert into carry dtmf tone frequently information voice signal and send.
2. electronic scales according to claim 1 is characterized in that, described audio frequency transmitting element comprises block isolating circuit, driving circuit and the loudspeaker that links to each other successively, and described block isolating circuit links to each other with the output terminal of converting unit.
3. electronic scales according to claim 2 is characterized in that, described loudspeaker places apparatus main body inner, and towards the upper surface of apparatus main body, corresponding apparatus main body surface has aperture.
4. according to any described electronic scales in the claim 1 to 3, it is characterized in that described audio frequency transmitting element is play time >=55 millisecond of a dtmf tone, and set quiet time of one >=60 milliseconds and separate two continuous dtmf tones.
5. electronic scales according to claim 4 is characterized in that, the time that described audio frequency transmitting element is play a dtmf tone is 100 milliseconds, and setting is separated two continuous dtmf tones with 120 milliseconds quiet time.
6. a mobile device comprises audio frequency receiving element, decoding unit and measurement data storage unit, it is characterized in that described audio frequency receiving element is used to receive the voice signal that carries dtmf tone frequency information that is sent by electronic scales; Described decoding unit is used for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element receives is decoded, and converts corresponding weight data into.
7. mobile device according to claim 6 is characterized in that, described mobile device is the mobile phone that has sound-recording function, the recording unit that described audio frequency receiving element is a mobile phone.
8. mobile device according to claim 6 is characterized in that, described decoding unit comprises:
Decoding program starts module, after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoder module according to predetermined decoding program decoding N time, obtains N data to each voice signal that carries dtmf tone frequency information that continues;
The valid data judge module, the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops module, stops when the valid data number that obtains reaches the decoding of data designated quantity.
9. mobile device according to claim 8; It is characterized in that, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
10. weight data radio transmitting method is applied to the measured body weight system that is made up of electronic scales and mobile device, it is characterized in that, comprises the following steps:
(1) by electronic scales weight data is encoded, convert thereof into the dtmf tone audio data;
(2) electronic scales with the dtmf tone audio data with carry dtmf tone frequently the form of the voice signal of information send;
(3) receive the voice signal that carries dtmf tone frequency information by mobile device;
(4) by mobile device the voice signal that carries dtmf tone frequency information is decoded, convert corresponding weight data into.
11. weight data radio transmitting method according to claim 10 is characterized in that, in (4) step, decode procedure specifically comprises:
Decoding program starts, and after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoding according to predetermined decoding program decoding N time, obtains N data to each dtmf tone audio data that continues;
Valid data judge that the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops, and stops when the valid data number that obtains reaches the decoding of data designated quantity.
12. weight data radio transmitting method according to claim 11; It is characterized in that, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
13. a measured body weight system comprises electronic scales and mobile device, it is characterized in that,
Described electronic scales comprises:
Apparatus main body;
The measured body weight module is used to measure the human body weight data;
Storage unit is used to store the weight data that measures;
Converting unit is used for weight data with storage unit and carries out dtmf tone and encode frequently, converts corresponding dtmf tone audio data and output into;
The audio frequency transmitting element, be used for dtmf tone audio data with converting unit output convert into carry dtmf tone frequently information voice signal and send;
Described mobile device comprises: audio frequency receiving element, decoding unit, and the measurement data storage unit, described audio frequency receiving element is used to receive the voice signal that carries dtmf tone frequency information that is sent by electronic scales; Described decoding unit is used for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element receives is decoded, and converts corresponding weight data into.
14. measured body weight according to claim 13 system is characterized in that described mobile device is the mobile phone that has sound-recording function, the recording unit that described audio frequency receiving element is a mobile phone.
15., it is characterized in that described decoding unit comprises according to claim 13 or 14 described measured body weight systems:
Decoding program starts module, after receiving the start bit voice, starts decoding program, begins the subsequent sound audio data is decoded;
The voice data decoder module according to predetermined decoding program decoding N time, obtains N data to each voice signal that carries dtmf tone frequency information that continues;
The valid data judge module, the number of the identical data that decoding obtains is then confirmed as valid data greater than preset value M;
Decoding program stops module, stops when the valid data number that obtains reaches the decoding of data designated quantity.
16. measured body weight according to claim 15 system; It is characterized in that, when described predetermined decoding program is decoded for the voice signal that carries dtmf tone frequency information that the audio frequency receiving element is received, at first the voice signal that carries dtmf tone frequency information is carried out DFT; Obtain the gain and the gain of 2 subharmonic of the corresponding frequency of DTMF; If the gain of the corresponding frequency of DTMF is lower than predetermined threshold value or the gain of 2 subharmonic surpasses preset threshold value, judge that then this frequency point data is an interfering data, otherwise; Judge that this frequency is effective frequency, tabling look-up parses corresponding numerical value.
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| FR3032536B1 (en) * | 2015-02-09 | 2017-02-10 | Pierre Brisson | ELECTRONIC SCALE WEIGHING METHOD AND CORRESPONDING SYSTEM |
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| CN103377313B (en) * | 2012-04-12 | 2017-04-12 | 株式会社纳米软件 | Health measuring and managing system |
| CN103364066A (en) * | 2013-07-11 | 2013-10-23 | 中山市永衡日用制品有限公司 | Electronic scale using voice frequency to transmit data |
| CN106197637A (en) * | 2015-05-05 | 2016-12-07 | 北京康智乐思网络科技有限公司 | Intelligent weight scale system |
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