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IIMCP01
IMMFP01
IMMFP03
IMMFP03
IMMPI01
IMMPI01
IMSPM01
INICT01
INICT03A
INICT03A
INICT03A
IPFLD24
IPSYS01
IPSYS01
IPSYS01
803.93.00C
FD2A02TR-RN20
FHDK 14P5101/S35A
OADM 20I6572/S14F
BUR622-16-2
BKF12/120/400/2002
GDM120N-528/0750
E642B-MGB
H25E-F1-SS-10
H38D-1800-ABZC-8830-LED-SC-UL
QSI QTERM-K65
9604-1121
3500/20
1900/65A
1900/65A
330780-50-00
128229-01
128229-01
167699-02
167699-02
167699-02
3300/16-14-01-03-00-00-01
3500/15
3500/15
3500/15
3500/20
125840-02
1X35668
3500/22M
330180-90-00
3500/42M
3500/42M
3500/42M
3500/42M
3500/42M
330730-040-00-00
330103-00-06-10-02-00
330130-040-00-00
330180-X0-05
330130-045-00-00
330130-045-00-00
19047-01
330980-51-00
1900/65A-00-00-02-00-00
22810-01-05-50-02
10244-27-50-01
330103-00-04-10-02-00
330106-05-30-10-02-00
330130-040-01-00
146031-01
146031-01
1900/65A-00-02-01-01-01
1900/65A
1900/65A
1900/65A-01-01-01-00-00
1900/65A-01-00-01-00-00
106M1081-01
9200-06-01-10-00
135462-01
132419-01
132417-01
3500/42M（176449-02）
3500/42M
3500/22M
125760-01
125768-01
129478-01
133323-01
3500
3500
3500/05-01-01-00-00-00
3500/20
125720-01
125720-01
330104-00-05-10-02-CN
3500/42-01-00
3500/42-01-00
146031-02
128240-01
330703-000-070-10-02-05
133442-01
3500/53
133819-02
3300/16-11-01-03-00-00-01
3300/20-12-01-03-00-00
84152-01
A / D Conversion circuit module, because the sampling frequency is not high, choose 8-bit serial a / D converter ADC0832 can be. The ADC0832 uses the structure of a sampling-like data comparator, which is converted by successive approximation. Depending on the software configuration of the multiplexer, the input voltage to be converted is connected to one input and to the ground in single-ended input mode, and to one input and to another in differential input mode. The two inputs of the ADC0832 can be assigned to a positive or negative pole and can be configured by a multiplexer. Note, however, that when the input voltage connected to the assigned terminal is lower than the input voltage assigned to the negative terminal, the conversion result is all 0. The Control Command is transmitted through a serial data link connected to the control processor, and the Channel Selection and input configuration are configured by software. The serial communication format can include more functionality in the converter without increasing the package size. In addition, the converter and the analog sensor can be put together, and the remote control processor serial communication, rather than low-level analog signal remote transmission. Such processing makes the return to the processor is noise-free digital data, avoiding the interference of analog signal transmission. The hardware structure of the whole acquisition system has been designed, the surface emg signal is very weak, the weak signal must be amplified first to meet the requirements of AD acquisition unit, and because the human body is a conductive body, pOWER FREQUENCY INTERFERENCE, external electric field and magnetic field induction will form measurement noise in human body, which will interfere with the detection of EMG Information and seriously affect the work of measurement system and the correct measurement of useful signals. According to the characteristics of surface electromyography (SEMG) signal generation and the basic requirements of acquisition technology, a digital sensor of semg signal is designed in this paper. The system was originally designed for 8-channel QCM detection, that is, using 8 identical oscillators with Max913 chip as the core, sending them to the D end of 4 differential frequency devices 74LS74 through 2 CD4069 inverters, each dynatron 74LS74 has two d flip-flops inside. Two 6m high-precision active crystal oscillators were converted into 86m output signals after the clock chip CDCV304, and were sent to the CLK terminal of 4 differential frequency devices 74LS74 respectively. The signal is sent to the I / O port of the programmable logic device 570gt100c3 chip after 4 different channels 74LS74. Epm570gt100c3 here to do the frequency meter, through software programming to achieve. The difference frequency is sent to 51 mcu AT89S52 through 8-bit data line, at the same time AT89S52 to EPM570GT100C3 control, to choose which channel, AT89S52 processed data through 232 serial port to the host computer. Quartz Crystal Oscillator and difference frequency circuit, in order to ensure that QCM can oscillate after dropping biological reagent, a set of special self-excited oscillator circuit must be adopted, the self-excited oscillator is usually composed of three parts: basic amplifying circuit, positive feedback network and frequency selection network. In the Quartz Crystal Oscillator circuit, the Quartz Crystal, as the main component of the positive feedback network, is also a kind of frequency selection network, which can only be satisfied under the natural resonant frequency of the Quartz Crystal Oscillator. According to this principle, using MAX913 chip as the core of the oscillator, its output is TTL level, easy to scm or programmable logic device signal acquisition. The square wave signal from the QCM oscillator circuit is sent to the D end of the difference frequency generator 74LS74, and the square wave signal from the 6M crystal oscillator is sent to the CLK end of the difference frequency generator 74LS74, and the difference frequency signal is sent to the programmable logic device for counting, the purpose of using the difference frequency is to reduce the frequency of the input to the programmable logic device. Oscillation and difference frequency circuit of Quartz Crystal
A / D Conversion circuit module, because the sampling frequency is not high, choose 8-bit serial a / D converter ADC0832 can be. The ADC0832 uses the structure of a sampling-like data comparator, which is converted by successive approximation. Depending on the software configuration of the multiplexer, the input voltage to be converted is connected to one input and to the ground in single-ended input mode, and to one input and to another in differential input mode. The two inputs of the ADC0832 can be assigned to a positive or negative pole and can be configured by a multiplexer. Note, however, that when the input voltage connected to the assigned terminal is lower than the input voltage assigned to the negative terminal, the conversion result is all 0. The Control Command is transmitted through a serial data link connected to the control processor, and the Channel Selection and input configuration are configured by software. The serial communication format can include more functionality in the converter without increasing the package size. In addition, the converter and the analog sensor can be put together, and the remote control processor serial communication, rather than low-level analog signal remote transmission. Such processing makes the return to the processor is noise-free digital data, avoiding the interference of analog signal transmission. The hardware structure of the whole acquisition system has been designed, the surface emg signal is very weak, the weak signal must be amplified first to meet the requirements of AD acquisition unit, and because the human body is a conductive body, pOWER FREQUENCY INTERFERENCE, external electric field and magnetic field induction will form measurement noise in human body, which will interfere with the detection of EMG Information and seriously affect the work of measurement system and the correct measurement of useful signals. According to the characteristics of surface electromyography (SEMG) signal generation and the basic requirements of acquisition technology, a digital sensor of semg signal is designed in this paper. The system was originally designed for 8-channel QCM detection, that is, using 8 identical oscillators with Max913 chip as the core, sending them to the D end of 4 differential frequency devices 74LS74 through 2 CD4069 inverters, each dynatron 74LS74 has two d flip-flops inside. Two 6m high-precision active crystal oscillators were converted into 86m output signals after the clock chip CDCV304, and were sent to the CLK terminal of 4 differential frequency devices 74LS74 respectively. The signal is sent to the I / O port of the programmable logic device 570gt100c3 chip after 4 different channels 74LS74. Epm570gt100c3 here to do the frequency meter, through software programming to achieve. The difference frequency is sent to 51 mcu AT89S52 through 8-bit data line, at the same time AT89S52 to EPM570GT100C3 control, to choose which channel, AT89S52 processed data through 232 serial port to the host computer. Quartz Crystal Oscillator and difference frequency circuit, in order to ensure that QCM can oscillate after dropping biological reagent, a set of special self-excited oscillator circuit must be adopted, the self-excited oscillator is usually composed of three parts: basic amplifying circuit, positive feedback network and frequency selection network. In the Quartz Crystal Oscillator circuit, the Quartz Crystal, as the main component of the positive feedback network, is also a kind of frequency selection network, which can only be satisfied under the natural resonant frequency of the Quartz Crystal Oscillator. According to this principle, using MAX913 chip as the core of the oscillator, its output is TTL level, easy to scm or programmable logic device signal acquisition. The square wave signal from the QCM oscillator circuit is sent to the D end of the difference frequency generator 74LS74, and the square wave signal from the 6M crystal oscillator is sent to the CLK end of the difference frequency generator 74LS74, and the difference frequency signal is sent to the programmable logic device for counting, the purpose of using the difference frequency is to reduce the frequency of the input to the programmable logic device. Oscillation and difference frequency circuit of Quartz Crystal
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