CN106166329B - Portable detection device and method based on neuromuscular electrical stimulator - Google Patents
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Abstract
本发明提供一种基于神经肌肉电刺激仪的便携式检测装置，包括壳体、电路板、软件系统和触摸屏，所述壳体包括：主壳体、按键帽和安装固定件；所述电路板包括：继电器网络、电阻网络、信号调理电路、CPU单片机和电源模块。发明通过继电器网络自动控制、安全保护和转换电路，电阻网络的不同阻值的负载电阻切换，信号调理电路对信号进行放大和加入信号零点电路，提高了采样的精度及稳定性，使检测的电性参数和波形精度更高，减小线性误差，结构简单，在医学器件检测和工控领域得到广泛应用。
The present invention provides a portable detection device based on a neuromuscular electrical stimulator, comprising a casing, a circuit board, a software system and a touch screen. The casing includes: a main casing, a key cap and a mounting fixture; the circuit board includes : Relay network, resistor network, signal conditioning circuit, CPU microcontroller and power supply module. The invention adopts the relay network automatic control, safety protection and conversion circuit, the load resistance switching of different resistance values of the resistance network, and the signal conditioning circuit to amplify the signal and add the signal zero circuit, which improves the accuracy and stability of sampling, and makes the detected electrical The performance parameters and waveform accuracy are higher, the linear error is reduced, and the structure is simple, and it is widely used in the fields of medical device detection and industrial control.
Description
技术领域technical field
本发明涉及精密仪器检测领域，尤其涉及一种基于神经肌肉电刺激仪的便携式检测装置及方法。The invention relates to the field of precision instrument detection, in particular to a portable detection device and method based on a neuromuscular electrical stimulator.
背景技术Background technique
在医学上，常用神经肌肉电刺激仪发出电脉冲序列诱发肌肉运动，刺激特定肌肉群使其抽搐或者收缩，继而达到“功能”修复的技术。该仪器输出电脉冲大小直接关系到治疗的效果，其电性参数输出的稳定性对治疗的进度起至关重要的作用，现目前，传统上的电子检测仪器读数不精确，反应不够灵敏、线型误差较大，不能很好的应用在精密仪器的电性检测上。因此，有必要设计一种基于神经肌肉电刺激仪的便携式检测装置及方法。In medicine, neuromuscular electrical stimulators are commonly used to send out electrical pulse sequences to induce muscle movement, stimulate specific muscle groups to twitch or contract, and then achieve "functional" repair technology. The size of the electrical pulse output by the instrument is directly related to the effect of the treatment, and the stability of its electrical parameter output plays a crucial role in the progress of the treatment. At present, the traditional electronic detection instruments have inaccurate readings, insensitive responses, and linearity. The type error is large, and it cannot be well applied to the electrical detection of precision instruments. Therefore, it is necessary to design a portable detection device and method based on a neuromuscular electrical stimulator.
发明内容SUMMARY OF THE INVENTION
本发明提供一种基于神经肌肉电刺激仪的便携式检测装置及方法，以解决目前传统电子检测仪读数不精确，反应不够灵敏、线型误差较大，不能很好的应用在精密仪器的电性检测上的问题。The present invention provides a portable detection device and method based on a neuromuscular electrical stimulator, so as to solve the problem that the current traditional electronic detector is inaccurate in reading, not sensitive enough in response, has large linear error, and cannot be well applied to the electrical properties of precision instruments. detection problems.
为了实现上述目的，本发明是通过如下的技术方案来实现：一种基于神经肌肉电刺激仪的便携式检测装置，包括壳体、电路板、软件系统和触摸屏，所述壳体包括：主壳体、按键帽和安装固定件；所述电路板包括：继电器网络、电阻网络、信号调理电路、CPU单片机和电源模块；其中，CPU单片机为带12位高速AD，所述带12位高速AD采用SMT32F407VET6；继电器网络与电阻网络连接，用于自动控制、安全保护和转换电路；电阻网络与信号调理电路连接，用于生成测试信号；信号调理电路与CPU单片机连接，用于放大信号和处理AD采样；电源模块用于提供装置所需电源；触摸屏与CPU单片机连接，用于显示输出信号和波形图；进一步地，所述继电器网络包括继电器，所述继电器采用TQ2-L2-5V。In order to achieve the above object, the present invention is achieved through the following technical solutions: a portable detection device based on a neuromuscular electrical stimulator, comprising a casing, a circuit board, a software system and a touch screen, and the casing includes: a main casing , button cap and installation fixture; the circuit board includes: relay network, resistance network, signal conditioning circuit, CPU single-chip microcomputer and power supply module; wherein, the CPU single-chip microcomputer is a 12-bit high-speed AD, and the 12-bit high-speed AD adopts SMT32F407VET6 ;The relay network is connected with the resistance network for automatic control, safety protection and conversion circuits; the resistance network is connected with the signal conditioning circuit for generating test signals; the signal conditioning circuit is connected with the CPU single-chip microcomputer for amplifying the signal and processing AD sampling; The power module is used to provide the power required by the device; the touch screen is connected to the CPU single-chip microcomputer for displaying output signals and waveform diagrams; further, the relay network includes a relay, and the relay adopts TQ2-L2-5V.
进一步地，所述电阻网络包括负载电阻，所述负载电阻分为300Ω负载电阻、500Ω负载电阻、1000Ω负载电阻、2000Ω负载电阻、10KΩ负载电阻和外部扩展80Ω负载电阻；进一步地，所述信号调理电路包括可调增益放大器，所述可调增益放大器用于对信号放大1-128倍和将信号零点调整到1.25V，所述可调增益放大器采用PGA280。Further, the resistance network includes a load resistance, and the load resistance is divided into 300Ω load resistance, 500Ω load resistance, 1000Ω load resistance, 2000Ω load resistance, 10KΩ load resistance and external extended 80Ω load resistance; further, the signal conditioning The circuit includes an adjustable gain amplifier, which is used for amplifying the signal by 1-128 times and adjusting the zero point of the signal to 1.25V, and the adjustable gain amplifier adopts PGA280.
进一步地，所述电源模块包括锂电池充电电路、3.3V电源、5V背光及继电器供电电源、±5V模拟电路供电电源和一键开关机电路；其中，所述锂电池充电电路包括电池充电控制器，所述电池充电控制器采用MCP73831T-2ATI/OT；5V背光及继电器供电电源包括第一集成开关，所述第一集成开关采用TPS61040；±5V模拟电路供电电源包括第二集成开关，所述第二集成开关采用TPS65133；±5V模拟电路供电电源包括集成开关，所述集成开关采用TPS65133；一键开关机电路包括开关MOS管和单向二极管。Further, the power module includes a lithium battery charging circuit, a 3.3V power supply, a 5V backlight and relay power supply, a ±5V analog circuit power supply and a one-key switch circuit; wherein, the lithium battery charging circuit includes a battery charging controller. , the battery charging controller adopts MCP73831T-2ATI/OT; the 5V backlight and relay power supply includes a first integrated switch, the first integrated switch adopts TPS61040; the ±5V analog circuit power supply includes a second integrated switch, the first integrated switch The two integrated switches use TPS65133; the ±5V analog circuit power supply includes an integrated switch, and the integrated switch adopts TPS65133; the one-key switch circuit includes a switch MOS tube and a one-way diode.
进一步地，所述触摸屏与CPU单片机之间设有薄膜晶体管驱动电路，所述触摸屏采用4.3寸电容触摸屏。Further, a thin film transistor driving circuit is arranged between the touch screen and the CPU single-chip microcomputer, and the touch screen adopts a 4.3-inch capacitive touch screen.
一种基于神经肌肉电刺激仪的便携式检测方法，所述方法包括如下步骤：S1)先将装置开机；S2)神经肌肉电刺激仪的输出端分正负极分别连接至装置的信号输入端；S3)在装置上选择通道、阻抗，进入测试界面；S4)将神经肌肉电刺激仪开机后，启动输出，进行测试。A portable detection method based on a neuromuscular electrical stimulator, the method comprising the steps of: S1) firstly turning on the device; S2) the output terminals of the neuromuscular electrical stimulator are respectively connected to the signal input terminals of the device by positive and negative poles; S3) Select the channel and impedance on the device, and enter the test interface; S4) After the neuromuscular electrical stimulator is turned on, start the output and carry out the test.
进一步地，所述步骤S3)包括步骤S3.1)：进入测量模式，设置负载阻抗、测试通道、电压范围和频带范围。Further, the step S3) includes step S3.1): enter the measurement mode, and set the load impedance, the test channel, the voltage range and the frequency band range.
进一步地，所述测试参数包括电流、电压、输出波形图、输入电压信号值、信号频率、直流分量、交流分量、干扰电流和拍频。Further, the test parameters include current, voltage, output waveform, input voltage signal value, signal frequency, DC component, AC component, interference current and beat frequency.
本发明的有益效果是：本发明通过继电器网络自动控制、安全保护和转换电路，电阻网络的不同阻值的负载电阻切换，信号调理电路对信号进行放大和加入信号零点电路，提高了采样的精度及稳定性，使检测的电性参数和波形精度更高，减小线性误差，结构简单，在医学器件检测和工控领域得到广泛应用。The beneficial effects of the present invention are: the present invention adopts the relay network automatic control, safety protection and conversion circuit, the load resistance of different resistance values of the resistance network is switched, the signal conditioning circuit amplifies the signal and adds the signal zero circuit, which improves the sampling accuracy and stability, so that the detected electrical parameters and waveform accuracy are higher, the linear error is reduced, and the structure is simple, and it is widely used in the fields of medical device detection and industrial control.
附图说明Description of drawings
图1是本发明的一个结构连接框图；图2是本发明的CPU单片机的一个电路连接示意图；图3是本发明的可调增益放大器的一个电路连接示意图；图4是本发明的接入点的一个电路连接示意图；图5是本发明的继电器DQ1～DQ3的一个电路连接示意图；图6是本发明继电器DQ4～DQ7的一个电路连接示意图；图7是本发明继电器DQ8的一个电路连接示意图。Fig. 1 is a structural connection block diagram of the present invention; Fig. 2 is a circuit connection schematic diagram of a CPU single-chip microcomputer of the present invention; Fig. 3 is a circuit connection schematic diagram of an adjustable gain amplifier of the present invention; Fig. 4 is an access point of the present invention Figure 5 is a schematic diagram of a circuit connection of relays DQ1 to DQ3 of the present invention; Figure 6 is a schematic diagram of a circuit connection of relays DQ4 to DQ7 of the present invention; Figure 7 is a schematic diagram of a circuit connection of relay DQ8 of the present invention.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明实施例中的技术方案，并使本发明实施例的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明实施例中技术方案作进一步详细的说明。In order for those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above objects, features, and advantages of the embodiments of the present invention more clearly understood, the following describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings. for further details.
参见图1，本发明包括壳体、电路板和触摸屏，壳体包括：主壳体、薄膜按键；电路板包括：继电器网络、电阻网络、信号调理电路、CPU单片机和电源部分；其中，CPU单片机为带12位高速AD，所述带12位高速AD采用SMT32F407VET6；继电器网络与电阻网络连接，用于自动控制、安全保护和转换电路；电阻网络与信号调理电路连接，用于生成测试信号；信号调理电路与CPU单片机连接，用于放大信号和处理AD采样；电源部分产生系统所需的数字及模拟电源，用于系统供电；触摸屏与CPU单片机连接，用于显示输出信号、波形图及测量值。Referring to FIG. 1, the present invention includes a casing, a circuit board and a touch screen. The casing includes: a main casing and a membrane key; the circuit board includes: a relay network, a resistor network, a signal conditioning circuit, a CPU single-chip microcomputer and a power supply part; wherein, the CPU single-chip microcomputer For the 12-bit high-speed AD, the 12-bit high-speed AD adopts SMT32F407VET6; the relay network is connected with the resistance network for automatic control, safety protection and conversion circuits; the resistance network is connected with the signal conditioning circuit for generating test signals; signal; The conditioning circuit is connected with the CPU single-chip microcomputer to amplify the signal and process AD sampling; the power supply part generates the digital and analog power supplies required by the system for system power supply; the touch screen is connected to the CPU single-chip microcomputer to display output signals, waveforms and measured values. .
在本实施例中，继电器网络包括继电器，所述继电器采用TQ2-L2-5V；电阻网络包括负载电阻，负载电阻分为300Ω负载电阻、500Ω负载电阻、1000Ω负载电阻、2000Ω负载电阻、10KΩ负载电阻和外部扩展80Ω负载电阻；信号调理电路包括可调增益放大器，可调增益放大器用于对信号放大1-128倍和将信号零点调整到1.25V，可调增益放大器采用PGA280；电源模块包括锂电池充电电路、3.3V电源、5V背光及继电器供电电源、±5V模拟电路供电电源和一键开关机电路；其中，锂电池充电电路包括电池充电控制器，所述控制器采用MCP73831T-2ATI/OT；3.3V电源包括IC芯片，IC芯片采用TPS62260DDC；5V背光及继电器供电电源包括第一集成开关，第一集成开关采用TPS61040；±5V模拟电路供电电源包括第二集成开关，第二集成开关采用TPS65133；一键开关机电路包括开关MOS管和单向二极管。In this embodiment, the relay network includes a relay, and the relay adopts TQ2-L2-5V; the resistance network includes a load resistance, and the load resistance is divided into 300Ω load resistance, 500Ω load resistance, 1000Ω load resistance, 2000Ω load resistance, 10KΩ load resistance and external extended 80Ω load resistance; the signal conditioning circuit includes an adjustable gain amplifier, the adjustable gain amplifier is used to amplify the signal by 1-128 times and adjust the zero point of the signal to 1.25V, and the adjustable gain amplifier adopts PGA280; the power module includes a lithium battery Charging circuit, 3.3V power supply, 5V backlight and relay power supply, ±5V analog circuit power supply and one-key switch circuit; among them, the lithium battery charging circuit includes a battery charging controller, and the controller adopts MCP73831T-2ATI/OT; The 3.3V power supply includes an IC chip, and the IC chip adopts TPS62260DDC; the 5V backlight and relay power supply includes a first integrated switch, and the first integrated switch adopts TPS61040; the ±5V analog circuit power supply includes a second integrated switch, and the second integrated switch adopts TPS65133; The one-key switch circuit includes a switch MOS tube and a one-way diode.
在本实施例中，所述触摸屏与CPU单片机之间设有薄膜晶体管驱动电路，所述触摸屏采用4.3寸电容触摸屏。In this embodiment, a thin film transistor driving circuit is arranged between the touch screen and the CPU single-chip microcomputer, and the touch screen adopts a 4.3-inch capacitive touch screen.
本发明的工作原理是：根据测试设置，软件控制继电器DQ1～DQ3选取信号接入点J1～J3中的其中一路或两路，并控制继电器DQ4～DQ8选取测试用的负载电阻网络，DQ8用于选取外部电阻和内部的继电器。电压测试信号通过测量分压电阻R238～R242和R244分压后，电压测试信号送入PGA280的7脚也就是通道2中进行放大及信号中值的抬升，经过调理后的信号送入的23脚进行AD采样，根据AD值的大小，CPU自动调节PGA280的放大倍数到合适的值，保证信号的完整，得到完整的测量数据。PGA280的信号中值电压输入脚为3脚，PGA280的3脚输入的信号中值电压由CPU的DA 30脚输出；实现软件可调。The working principle of the present invention is: according to the test settings, the software controls the relays DQ1-DQ3 to select one or two of the signal access points J1-J3, and controls the relays DQ4-DQ8 to select the load resistance network for testing, and DQ8 is used for Select external resistors and internal relays. After the voltage test signal is divided by measuring the voltage dividing resistors R238~R242 and R244, the voltage test signal is sent to pin 7 of PGA280, that is, channel 2 for amplification and signal median rise, and the conditioned signal is sent to pin 23. Carry out AD sampling, according to the size of the AD value, the CPU automatically adjusts the magnification of the PGA280 to an appropriate value to ensure the integrity of the signal and obtain complete measurement data. The signal median voltage input pin of PGA280 is pin 3, and the median voltage of the signal input by pin 3 of PGA280 is output by the DA 30 pin of the CPU; it can be adjusted by software.
在本实施例中，当电流测试时，电流测试信号由R274将电流信号转换成电压信号后送入PGA280的通道1，其他信号流程及处理方式同上述工作原理。In this embodiment, during the current test, the current test signal is converted into a voltage signal by R274 and then sent to channel 1 of the PGA280. Other signal processes and processing methods are the same as the above working principles.
一种基于神经肌肉电刺激仪的便携式检测方法，所述方法包括如下步骤：S1)先将装置开机；S2)神经肌肉电刺激仪的输出端分正负极分别连接至装置的信号输入端；S3)在装置上选择通道、阻抗，进入测试界面，进入测量模式，设置负载阻抗、测试通道、电压范围和频带范围；S4)将神经肌肉电刺激仪开机后，启动输出，进行测试，得出测试参数,包括：电流（RMS）、电压（RMS）、电流（MAX）、电压（MAX）、输出波形图、输入电压信号值、信号频率、直流分量、交流分量、干扰电流和拍频。A portable detection method based on a neuromuscular electrical stimulator, the method comprising the steps of: S1) firstly turning on the device; S2) the output terminals of the neuromuscular electrical stimulator are respectively connected to the signal input terminals of the device by positive and negative poles; S3) Select the channel and impedance on the device, enter the test interface, enter the measurement mode, and set the load impedance, test channel, voltage range and frequency band range; S4) After the neuromuscular electrical stimulator is turned on, start the output, carry out the test, and obtain Test parameters, including: current (RMS), voltage (RMS), current (MAX), voltage (MAX), output waveform, input voltage signal value, signal frequency, DC component, AC component, interference current and beat frequency.
在本实施例中，测试电流（MAX、RMS）和电压（MAX、RMS）时，信号通过继电器网络选取1～3通道中的一个、两个或三个、接入负载电阻网络及PGA280后通过CPU的高速AD采样，得到原始数据，CPU通过傅里叶变换处理，得出电流（MAX、RMS）和电压(MAX、RMS)值；测试输入信号值时，信号通过继电器网络、负载电阻网络及PGA280后通过CPU的高速AD采样，得到原始数据，通过改变采样时间，采样频率可在10K到100K之间变化；测试直流分量时，通过测量得到原始数据，CPU通过傅里叶变换处理，得出直流分量；测试交流分量时，通过测量得到原始数据，CPU通过傅里叶变换处理，得出交流分量；测试干扰电流和拍频时，干扰电流和拍频一般由2个或者多个通道信号构成，其中一个有特定幅值、频率，另外的有特定幅值及可变频率;每个通道的电流、频率可以分别测量；干扰电流有效值是通过输入信号的叠加实现的。In this embodiment, when testing current (MAX, RMS) and voltage (MAX, RMS), the signal selects one, two or three of channels 1 to 3 through the relay network, connects to the load resistance network and PGA280, and then passes through The high-speed AD sampling of the CPU obtains the original data, and the CPU processes the Fourier transform to obtain the current (MAX, RMS) and voltage (MAX, RMS) values; when testing the input signal value, the signal passes through the relay network, load resistance network and After the PGA280 is sampled by the high-speed AD of the CPU, the original data is obtained. By changing the sampling time, the sampling frequency can be changed between 10K and 100K; when testing the DC component, the original data is obtained by measurement, and the CPU is processed by Fourier transform to obtain DC component; when testing the AC component, the original data is obtained by measurement, and the CPU processes the Fourier transform to obtain the AC component; when testing the interference current and beat frequency, the interference current and beat frequency are generally composed of 2 or more channel signals , one of which has a specific amplitude and frequency, and the other has a specific amplitude and variable frequency; the current and frequency of each channel can be measured separately; the effective value of the interference current is realized by the superposition of the input signals.
由上述实施例可见，本发明通过继电器网络自动控制、安全保护和转换电路，电阻网络的不同阻值的负载电阻切换，信号调理电路对信号进行放大和加入信号零点电路，提高了采样的精度及稳定性，使检测的电性参数和波形精度更高，减小线型误差，结构简单，在医学器件检测和工控领域得到广泛应用。It can be seen from the above embodiments that the present invention uses relay network automatic control, safety protection and conversion circuit, load resistance switching of different resistance values of the resistance network, signal conditioning circuit to amplify the signal and add the signal zero point circuit, which improves the sampling accuracy and efficiency. Stability, higher accuracy of detected electrical parameters and waveforms, reduced linear errors, simple structure, and are widely used in the fields of medical device detection and industrial control.
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.
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