CN106153083A - The method and device of Portable precise test instrunment is made based on electronic equipment - Google Patents
The method and device of Portable precise test instrunment is made based on electronic equipment Download PDFInfo
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- CN106153083A CN106153083A CN201610478596.5A CN201610478596A CN106153083A CN 106153083 A CN106153083 A CN 106153083A CN 201610478596 A CN201610478596 A CN 201610478596A CN 106153083 A CN106153083 A CN 106153083A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
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Abstract
The invention discloses a kind of method making Portable precise test instrunment based on electronic equipment, including: detected signal is accessed sensor；Detected signal is transmitted to intensity/voltage transformation module by sensor, and detected signal is converted into voltage signal by intensity/voltage transformation module；Voltage signal carries out operation amplifier through operational amplifier；Level output module is connected with voltage/frequency modular converter, for representing the progression of operational amplifier；Voltage/frequency modular converter receives the magnitude of voltage after operational amplifier operation amplifier, and magnitude of voltage is converted to frequency values, and voltage/frequency modular converter output amplitude is determined by level output module；Frequency values and amplitude are transmitted to electronic equipment through electronic equipment interfaces；Power supply is that whole test circuit is powered.The invention also discloses the device corresponding with the method.The present invention have be easy to carry, easily operation, cost be relatively low and widely used beneficial effect.
Description
Technical Field
The invention relates to the field of portable precision test instruments, in particular to a method and a device for manufacturing a portable precision test instrument based on electronic equipment.
Background
The portable testing instrument is the most common digital testing tool in daily life and industrial application, and has the ultra-strong computing capability and strong storage capability of a high-performance processing chip. More and more technicians carry the handheld high-precision measuring equipment during field operation, so that the factors of large size, difficulty in moving and the like of the traditional measuring instrument can be overcome. The installation and operation maintenance of measuring equipment in various electronic equipment industries such as consumer electronics, national defense, heavy industry, education, semiconductor manufacturing, communication and the like need portable measuring instruments, the quality of products is extracted and analyzed through parameters such as pressure, flow, voltage amplitude and the like, and how to more accurately and conveniently acquire parameter data of the type is the core of the development of intelligent instruments.
Common portable testing instruments and meters comprise sensors, driving circuits, analog-to-digital converters, data processing modules, displays and the like, and are limited by production scale and user quantity, and the devices often have the defects of high price, unfriendly interface, single function, no upgradability, weak communication function and the like. With the rapid development of smart phones and related APP, a platform for processing, converting and displaying basic information can be provided by combining the functions of the smart phones and the APP software. That is to say, the functions of the data processing module and the display contained in the common portable test instrument can be completely completed by the mobile phone.
Based on the universality, the universality and the portability of the smart phone, and the Android system (the Linux-based free and open operating system which is easy to program and develop) which is adopted by most mobile phones, a universal, convenient-to-process, handheld and portable hardware and software processing environment is provided for receiving information. And the design of a precise instrument can be carried out by combining the high-precision and high-integration peripheral hardware of the existing instrument, and the instrument is small and exquisite, is easy to carry and is convenient to use. However, the common mobile phone has few external interfaces, and is difficult to collect data from the outside, so that the application in the field is limited.
Therefore, based on the above problems, there is a strong need in the art to design a targeted solution that helps to improve the accuracy, portability, efficiency, and utility of portable test instruments and meters.
Disclosure of Invention
The invention aims to overcome the technical problems and provides a method and a device for manufacturing a portable precision test instrument based on electronic equipment, which are convenient to carry, easy to operate, easy to upgrade, small in size, low in cost, rich in acquired information and powerful in function.
To solve the above technical problem, according to a first aspect of the present invention, there is provided a method for manufacturing a portable precision test instrument based on an electronic device, comprising:
connecting the detected signal to a sensor; the sensor transmits the detected signal to an intensity/voltage conversion module, and the intensity/voltage conversion module converts the detected signal into a voltage signal; the voltage signal is subjected to operational amplification through an operational amplifier; the level output module is connected with the voltage/frequency conversion module and used for representing the stage number of the operational amplifier; the voltage/frequency conversion module receives the voltage value after operational amplification of the operational amplifier and converts the voltage value into a frequency value, and the output amplitude value of the voltage/frequency conversion module is determined by the level output module; the frequency value and the amplitude value are transmitted to the electronic equipment through the electronic equipment interface; wherein, the power supply supplies power for whole test circuit.
According to a second aspect of the present invention, there is provided a method for manufacturing a portable precision test instrument based on an electronic device, wherein a signal transmitted by the sensor is amplified through two stages of operation, and when the signal received by the sensor is a first signal, the first signal is amplified through a first stage of operation amplifier and then directly output to the voltage/frequency conversion module; when the signal received by the sensor is a second signal, the second signal is firstly subjected to operational amplification of the primary operational amplifier, the voltage signal subjected to the primary operational amplification is transmitted to the comparator and is compared with a reference potential set by the comparator, the voltage signal output after the comparison is transmitted to the secondary operational amplifier, and the voltage signal subjected to the secondary operational amplification is output to the voltage/frequency conversion module; wherein the first signal strength is greater than the second signal strength; the comparator is connected with the input end of the voltage/frequency conversion module.
According to a third aspect of the present invention, there is provided a method for manufacturing a portable precision test instrument based on an electronic device, wherein the operational amplifier is a multi-stage operational amplifier, and the stage number of the operational amplifier is selected according to the strength of the voltage signal converted by the strength/voltage conversion module; the number of the level output modules in the circuit subjected to multistage operational amplification is the same as the number of stages of the operational amplifier.
According to a fourth aspect of the present invention, there is provided a method of manufacturing a portable precision test instrument based on an electronic device, wherein the sensor is an electrical, thermal, photo, gas, force or acoustic sensor.
According to a fifth aspect of the present invention, there is provided a method for manufacturing a portable precision test instrument based on an electronic device, wherein the strength/voltage conversion module is a resistance/voltage conversion module, a current/voltage conversion module, a power/voltage conversion module, a capacitance/voltage conversion module or an inductance/voltage conversion module.
According to a sixth aspect of the present invention, there is provided an apparatus for manufacturing a portable precision test instrument based on electronic equipment, comprising: the system comprises a power supply, a sensor, an intensity/voltage conversion module, an operational amplifier, a level output module, a voltage/frequency conversion module and an electronic equipment interface; the power supply is used for supplying power to the whole test circuit; the sensor is used for receiving a detected signal; the intensity/voltage conversion module is connected between the sensor and the operational amplifier and is used for converting the detected signal into a voltage signal; the operational amplifier is connected with the strength/voltage conversion module and is used for performing operational amplification on signals; the level output module is connected with the voltage/frequency conversion module and used for representing the stage number of the operational amplifier; the voltage/frequency conversion module is used for receiving the voltage value after operational amplification of the operational amplifier and converting the voltage value into a frequency value, and the output amplitude value of the voltage/frequency conversion module is determined by the level output module; and the electronic equipment interface is used for receiving the frequency signal and the amplitude output by the voltage/frequency conversion module and transmitting the frequency signal and the amplitude to electronic equipment.
According to a seventh aspect of the present invention, there is provided an apparatus for manufacturing a portable precision test instrument based on an electronic device, further comprising a comparator, provided with a reference potential; the operational amplifier comprises a primary operational amplifier and a secondary operational amplifier, wherein when the signal received by the sensor is a first signal, the first signal is directly output to the voltage/frequency conversion module after being subjected to operational amplification by the primary operational amplifier; when the signal received by the sensor is a second signal, the second signal is firstly subjected to operational amplification of the primary operational amplifier, the voltage signal subjected to the primary operational amplification is transmitted to the comparator and is compared with a reference potential set by the comparator, the voltage signal output after the comparison is transmitted to the secondary operational amplifier, and the voltage signal subjected to the secondary operational amplification is output to the voltage/frequency conversion module; the first signal intensity is greater than the second signal intensity, and the comparator is connected with the input end of the voltage/frequency conversion module.
According to an eighth aspect of the present invention, there is provided an apparatus for manufacturing a portable precision testing instrument based on an electronic device, wherein the operational amplifier is a multi-stage operational amplifier, the stage number of the operational amplifier is selected according to the strength of the voltage signal converted by the strength/voltage conversion module, the number of the level output modules in a circuit subjected to multi-stage operational amplification is the same as the stage number of the operational amplifier, and each level output module corresponds to a voltage value of a different stage.
According to a ninth aspect of the present invention, there is provided an apparatus for manufacturing a portable precision test instrument based on an electronic device, wherein the sensor is an electric sensor, a thermal sensor, a photosensitive sensor, a gas sensor, a force sensor or a sound sensor.
According to a tenth aspect of the present invention, there is provided an apparatus for manufacturing a portable precision testing instrument based on an electronic device, wherein the intensity/voltage conversion module is a resistance/voltage conversion module, a current/voltage conversion module, a power/voltage conversion module, a capacitance/voltage conversion module or an inductance/voltage conversion module.
Compared with the prior art, the method and the device for manufacturing the portable precision testing instrument based on the electronic equipment have the following advantages that:
1. the volume is small, the carrying is convenient, and the operation is easy;
2. more accurate, precise and rich parameters can be obtained;
3. the method is not limited by production scale and user number, and has low cost and low price;
4. the electronic equipment is connected, the display interface is friendly, the functions are multiple, the upgradability and the communication function are good;
5. the electronic equipment with few external interfaces, such as a mobile phone, can be connected, can acquire data from the outside, and is wide in application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for manufacturing a portable precision test instrument based on electronic equipment according to the present invention;
FIG. 2 is a schematic diagram of a frame structure of the apparatus for manufacturing a portable precision testing instrument based on electronic equipment according to the present invention;
fig. 3 is a schematic diagram of another frame structure of the apparatus for manufacturing a portable precision testing instrument based on electronic equipment according to the present invention.
Description of reference numerals:
1. power supply 2 and sensor
3. Intensity/voltage conversion module 4 and operational amplifier
41. First-stage operational amplifier 42, second-stage operational amplifier
5. Level output module 51 and level output module I
52. Level output module II 6, voltage/frequency conversion module
7. Electronic equipment interface 8 and comparator
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings in combination with the embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention discloses a method for manufacturing a portable precision test instrument based on electronic equipment, which is used for manufacturing an interface circuit from a sensor to the electronic equipment. The electronic equipment is intelligent electronic equipment such as a computer, a mobile phone and the like with a signal input/output and display device. The sensor 2 inputs the detected signal into the electronic equipment, then completes the data processing work by using software, and then displays the result by the electronic equipment. The invention utilizes the information processing, displaying and communication functions of the electronic equipment to realize the small size, low price, easy carrying, easy upgrading and function diversification of the equipment.
Fig. 1 is a schematic flow chart of a method for manufacturing a portable precision testing instrument based on electronic equipment according to the present invention, and as shown in fig. 1, the present invention provides a method for manufacturing a portable precision testing instrument based on electronic equipment, including:
the detected signal is connected to the sensor 2;
the sensor 2 transmits the detected signal to the strength/voltage conversion module 3, and the strength/voltage conversion module 3 converts the detected signal into a voltage signal;
the voltage signal is operated and amplified through an operational amplifier 4;
the level output module 5 is connected with the voltage/frequency conversion module 6 and used for representing the stage number of the operational amplifier;
the voltage/frequency conversion module 6 receives the voltage value which is operated and amplified by the operational amplifier 4, and converts the voltage value into a frequency value, the output amplitude of the voltage/frequency conversion module 6 is determined by the level output module 5, and the output amplitude of the voltage/frequency conversion module 6 can also be modulated into a level shown by the level output module 5;
the frequency value and the amplitude value are transmitted to the electronic equipment through the electronic equipment interface 7;
wherein, the power supply 1 supplies power for the whole test circuit.
In a further embodiment of the present invention, the operational amplifier 4 is a multi-stage operational amplifier, the stage number of the operational amplifier 4 is selected according to the strength of the voltage signal converted by the strength/voltage conversion module 3, and the voltage signal converted by the strength/voltage conversion module 3 is subjected to different stage number operational amplification, wherein the number of the level output modules 5 in the circuit subjected to the multi-stage operational amplification is the same as the stage number of the operational amplifier 4.
The following describes the signal transmission process by taking two operational amplifiers as examples:
when the signal received by the sensor 2 is a first signal, the first signal is amplified by the first-stage operational amplifier 41 and then directly output to the voltage/frequency conversion module 6;
when the signal received by the sensor 2 is a second signal, the second signal is firstly amplified by the first-stage operational amplifier 41, the voltage signal amplified by the first-stage operational amplifier is transmitted to the comparator 8 and compared with the reference potential set by the comparator 8, the voltage signal output after the comparison is transmitted to the second-stage operational amplifier 42, and the voltage signal amplified by the second-stage operational amplifier is output to the voltage/frequency conversion module 6;
it should be noted that the first signal strength is greater than the second signal strength; the comparator 8 is connected between the primary operational amplifier 41 and the secondary operational amplifier 42, and one port of the comparator 8 is connected to the voltage/frequency conversion module 6; the first level output module 51 and the second level output module 52 are both connected to the voltage/frequency conversion module 6 and are selected by the comparator 8. If the signal received by the sensor 2 is weak or weaker, it may also pass through a three-stage operational amplifier, a four-stage operational amplifier, or more.
Fig. 2 is a schematic structural diagram of a frame of the apparatus for manufacturing a portable precision testing instrument based on an electronic device according to the present invention, and as shown in fig. 2, there is provided an apparatus for manufacturing a portable precision testing instrument based on an electronic device, including: the device comprises a power supply 1, a sensor 2, an intensity/voltage conversion module 3, an operational amplifier 4, a level output module 5, a voltage/frequency conversion module 6 and an electronic device interface 7.
In the device for manufacturing the portable precision test instrument based on the electronic equipment, a power supply 1 is used for supplying power to the whole test circuit; the sensor 2 is used for receiving the detected signals; the intensity/voltage conversion module 3 is connected between the sensor 2 and the operational amplifier 4 and is used for converting the detected signal into a voltage signal; the operational amplifier 4 is connected with the strength/voltage conversion module 3 and is used for performing operational amplification on the signal; the level output module 5 is connected with the voltage/frequency conversion module 6 and used for representing the stage number of the operational amplifier 4; the voltage/frequency conversion module 6 is configured to receive the voltage value amplified by the operational amplifier 4, and convert the voltage value into a frequency value, where an output amplitude of the voltage/frequency conversion module 6 is determined by the level output module 5, and the output amplitude of the voltage/frequency conversion module 6 may also be modulated into a level indicated by the level output module 5; the electronic device interface 7 is used for receiving the frequency signal and the amplitude output by the voltage/frequency conversion module 6 and transmitting the frequency signal and the amplitude to the electronic device.
In a further embodiment of the present invention, the apparatus for manufacturing a portable precision testing instrument based on electronic equipment of the present invention may further comprise a comparator 8, which is provided with a reference potential, and the operational amplifier 4 comprises a first-stage operational amplifier 41 and a second-stage operational amplifier 42.
When the signal received by the sensor 2 is the first signal, the first signal is directly output to the voltage/frequency conversion module 6 after being subjected to operational amplification by the first-stage operational amplifier 41.
When the signal received by the sensor 2 is the second signal, the second signal is firstly amplified by the first-stage operational amplifier 41, the voltage signal amplified by the first-stage operational amplifier is transmitted to the comparator 8 and compared with the reference potential set by the comparator 8, the voltage signal output after the comparison is transmitted to the second-stage operational amplifier 42, and the voltage signal amplified by the second-stage operational amplifier is output to the voltage/frequency conversion module 6.
It should be noted that the first signal strength is greater than the second signal strength, and the comparator 8 is connected between the first-stage operational amplifier 41 and the second-stage operational amplifier 42, and is connected to the input terminal of the voltage/frequency conversion module 6.
In a further embodiment of the invention, the sensor 2 may be an electrical, thermal, photo, gas, force or acoustic sensor.
In a further embodiment of the present invention, the operational amplifier 4 is a multi-stage operational amplifier, the level output module 5 is a plurality of level output modules, and each level output module 5 corresponds to a level value of a different gear respectively, and is used for representing the stage number of the operational amplifier 4. When the amplifier stage number changes, the level value output by the level output module 5 changes correspondingly. When the voltage level output module 5 is used, the stage number of the operational amplifier 4 can be determined according to the range or the strength of the transmitted voltage signal, and the stage number of the operational amplifier 4 can be judged according to the level value corresponding to the level output module 5.
Fig. 3 is a schematic structural diagram of another frame of the apparatus for manufacturing a portable precision testing instrument based on an electronic device according to the present invention, and as shown in fig. 3, there is provided an apparatus for manufacturing a portable precision testing instrument based on an electronic device, including: the device comprises a power supply 1, a sensor 2, an intensity/voltage conversion module 3, a primary operational amplifier 41, a secondary operational amplifier 42, a level output module I51, a level output module II 52, a comparator 8, a voltage/frequency conversion module 6 and an electronic device interface 7. The operational amplifier 4 includes a first-stage operational amplifier 41 and a second-stage operational amplifier 42, and the level output module 5 includes two level output modules, namely a first level output module 51 and a second level output module 52.
In addition, in a further embodiment of the present invention, a reference potential may be set in the comparator 8, while the operational amplifier 4 includes a primary operational amplifier 41 and a secondary operational amplifier 42. When the signal received by the sensor 2 is a first signal, the first signal is amplified by the first-stage operational amplifier 41 and then directly transmitted to the voltage/frequency conversion module 6; when the signal received by the sensor 2 is the second signal, the voltage signal amplified by the first-stage operational amplifier 41 of the second signal is transmitted to the comparator 8, the comparator 8 compares the received voltage signal with the reference potential and outputs the compared voltage signal to the second-stage operational amplifier 42, and then the signal amplified by the second-stage operational amplifier 42 is transmitted to the voltage/frequency conversion module 6.
It should be noted that the strength of the second signal is smaller than that of the first signal, the comparator 8 is connected to the input end of the voltage/frequency conversion module 6, and both the first level output module 51 and the second level output module 52 are connected to the voltage/frequency conversion module 6, and are used for representing the number of stages of the operational amplifier 4.
The electronic device in the invention can be a mobile phone, a computer, etc., and is used for receiving the frequency signal converted by the voltage/frequency conversion module 6 through the electronic device interface 7, then transmitting the frequency signal to the electronic device, and displaying the result on the display of the electronic device. The signal transmission process of the portable precision testing instrument manufactured based on the electronic equipment is described as follows by taking a mobile phone as an example:
when the device of the invention based on the electronic equipment for manufacturing the portable precision testing instrument is used, if the signal received by the sensor 2 is sensitive, the signal is directly output to the voltage/frequency conversion module 6 after being amplified by the first-stage operational amplifier 41; if the signal is weak, that is, not sensitive enough, the signal is amplified by the first-stage operational amplifier 41 and then output to the positive input terminal of the comparator 8, the comparator 8 selects the signal after comparing the reference potential and outputs the signal to the second-stage operational amplifier 42, and the signal amplified again by the second-stage operational amplifier 42 is output to the voltage/frequency conversion module 6 and then output to the electronic device interface 7. The level output module 5 controls the voltage amplitudes outputted by two gears at the same time, for example: the first grade is 2V, the first grade is 3V, the output result is sent into the mobile phone through the electronic equipment interface 7 after passing through the voltage/frequency conversion module 6, and finally the output frequency value is processed by software on the mobile phone, and the measurement result is displayed.
In general, signals detected by the sensor 2 are usually weak, and data acquisition can be performed only after the signals are amplified by a pre-amplification circuit, a main amplification circuit and other subsequent circuits. After the signal is amplified, a data acquisition mode different from the traditional data acquisition mode is adopted, namely, the voltage/frequency conversion module 6 is adopted for conversion (the amplified voltage signal is converted into a frequency signal with higher stability and beneficial to program identification), the frequency signal is sent into the mobile phone through a mobile phone earphone jack, and finally the converted frequency signal is processed by using the application on the mobile phone and the measurement result is displayed. Wherein, the number of stages of operational amplification can be selected according to the signal sensitivity or signal strength detected by the sensor 2.
Because the two accessed signals correspond to signals with different sizes respectively, the small signal is amplified once, the weaker signal is amplified twice, and the voltage of the two amplified signals is the same, so that the converted frequency values are the same. However, because the original signals are different, the corresponding final output pull-up potentials are different, the weaker signals correspond to output 2V potential output, and the small signals correspond to output of 3V point positions. Therefore, whether the output signal is subjected to primary amplification or secondary amplification can be judged according to the amplitude difference of the output pulse, so that which section the original signal is located in is judged, the frequency of the output pulse is calculated through software, the specific position of the original signal in each section is obtained, and the problem of insufficient AD dynamic range is solved. If the signal is too weak or the dynamic range is larger, 3-level or even more-level operational amplification can be adopted, and the dynamic range is improved by dividing the test area into 3 sections or more sections, so that the problem of insufficient dynamic range of mobile phone data acquisition can be completely broken through.
Generally, data acquisition modes provided by electronic devices, such as mobile phones, are mainly transmitted to the mobile phones through mobile phone headset jacks, and then filtered through a dc blocking circuit and a filter, so that the dc signals are converted into required frequency signals by the voltage/frequency conversion module 6 and are not filtered by the filter. The precision test instrument has higher requirement on data accuracy, and the loss of the common mobile phone earphone jack interface is unreliable, so that the measurement precision is inevitably influenced. After the voltage/frequency conversion module 6 is adopted for conversion, the pulse frequency represents the measurement signal, and the small change of the converted power does not influence the test result. Therefore, the accuracy of the test is ensured.
The use of the handset earphone jack input signal is bound by the dynamic range of the sound card analog-to-digital conversion, especially the dynamic range of the precision test instrument is generally very large (more than 100 dB), and for 16-bit AD, the dynamic range is only 216, namely less than 50 dB. The invention not only utilizes signalization as output signals with different frequencies, but also carries out classification according to the strength of the signals, and divides the whole measuring range into a plurality of sections, thereby breaking through the limitation of AD digit on the dynamic range of the detection signals. The specific method is to realize automatic gear switching output in the preamplification and main amplification circuit according to the specific strength of the signal, namely: signals with slightly strong signals only need primary preamplification, main amplification is skipped, and the signals are automatically converted by the voltage/frequency conversion module 6 and then sent to electronic equipment for processing; and weak signals need to be subjected to preamplification and main amplification and then are connected to a voltage/frequency conversion module 6 conversion part, and are input into the electronic equipment after conversion. In order to distinguish the two paths of strong and weak signals, the voltage magnitude maintained by the output frequency is different. Similarly, the voltage of the part is automatically switched according to the strength of the signal.
The invention converts the detected signal into electric signal through corresponding sensor, then converts into signal with certain frequency value and amplitude through the device of the invention, realizes data acquisition or analog-to-digital conversion through electronic equipment, converts the analog quantity into digital quantity, then carries out data processing through electronic equipment, and finally carries out analysis, storage or display.
The invention has the following beneficial effects:
1. the small signals can be automatically detected in a grading mode, the precision is more accurate, the voltage/frequency conversion module is used for converting and replacing the quantization coding process of the useful signals, the cost is reduced, and the conversion complexity is reduced.
2. The dynamic range of detection can be improved, and the limit of AD digit on the dynamic range of detection signals is broken through.
3. The hardware cost can be reduced to the greatest extent, the volume of the test equipment is reduced, and a small and cheap test instrument which is easy to upgrade and powerful in function is realized by utilizing the information processing, displaying and even communication functions of the electronic equipment.
A person skilled in the art may combine features of the above embodiments without departing from the spirit of the present invention, and the present invention may be used in electronic devices other than mobile phones, and the present invention is not limited to the above embodiments.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A method for manufacturing a portable precision test instrument based on electronic equipment is characterized by comprising the following steps:
connecting the detected signal to a sensor;
the sensor transmits the detected signal to an intensity/voltage conversion module, and the intensity/voltage conversion module converts the detected signal into a voltage signal;
the voltage signal is subjected to operational amplification through an operational amplifier;
the level output module is connected with the voltage/frequency conversion module and used for representing the stage number of the operational amplifier;
the voltage/frequency conversion module receives the voltage value after operational amplification of the operational amplifier and converts the voltage value into a frequency value, and the output amplitude value of the voltage/frequency conversion module is determined by the level output module;
the frequency value and the amplitude value are transmitted to the electronic equipment through the electronic equipment interface;
wherein, the power supply supplies power for whole test circuit.
2. The method of claim 1, wherein the signal transmitted by the sensor is amplified by a two-stage operation, wherein,
when the signal received by the sensor is a first signal, the first signal is amplified by the first-stage operational amplifier and then directly output to the voltage/frequency conversion module;
when the signal received by the sensor is a second signal, the second signal is firstly subjected to operational amplification of the primary operational amplifier, the voltage signal subjected to the primary operational amplification is transmitted to the comparator and is compared with a reference potential set by the comparator, the voltage signal output after the comparison is transmitted to the secondary operational amplifier, and the voltage signal subjected to the secondary operational amplification is output to the voltage/frequency conversion module;
wherein the first signal strength is greater than the second signal strength;
the comparator is connected with the input end of the voltage/frequency conversion module.
3. The method of claim 1, wherein the electronic device is a portable precision test instrument,
the operational amplifier is a multistage operational amplifier, and the stage number of the operational amplifier is selected according to the strength of the voltage signal converted by the strength/voltage conversion module;
the number of the level output modules in the circuit subjected to multistage operational amplification is the same as the number of stages of the operational amplifier.
4. The method of claim 1, wherein the electronic device is a portable precision test instrument,
the sensor is an electric sensitive sensor, a thermal sensitive sensor, a photosensitive sensor, a gas sensitive sensor, a force sensitive sensor or a sound sensitive sensor.
5. The method of claim 1, wherein the intensity/voltage conversion module is a resistance/voltage conversion module, a current/voltage conversion module, a power/voltage conversion module, a capacitance/voltage conversion module, or an inductance/voltage conversion module.
6. An apparatus for manufacturing a portable precision test instrument based on electronic equipment, comprising:
the system comprises a power supply, a sensor, an intensity/voltage conversion module, an operational amplifier, a level output module, a voltage/frequency conversion module and an electronic equipment interface; wherein,
the power supply is used for supplying power to the whole test circuit;
the sensor is used for receiving a detected signal;
the intensity/voltage conversion module is connected between the sensor and the operational amplifier and is used for converting the detected signal into a voltage signal;
the operational amplifier is connected with the strength/voltage conversion module and is used for performing operational amplification on signals;
the level output module is connected with the voltage/frequency conversion module and used for representing the stage number of the operational amplifier;
the voltage/frequency conversion module is used for receiving the voltage value after operational amplification of the operational amplifier and converting the voltage value into a frequency value, and the output amplitude value of the voltage/frequency conversion module is determined by the level output module;
and the electronic equipment interface is used for receiving the frequency value and the amplitude value output by the voltage/frequency conversion module and transmitting the frequency value and the amplitude value to electronic equipment.
7. The apparatus for manufacturing a portable precision test instrument based on electronic equipment according to claim 6,
also included is a comparator provided with a reference potential;
the operational amplifier comprises a primary operational amplifier and a secondary operational amplifier; wherein,
when the signal received by the sensor is a first signal, the first signal is directly output to the voltage/frequency conversion module after being subjected to operational amplification by the primary operational amplifier;
when the signal received by the sensor is a second signal, the second signal is firstly subjected to operational amplification of the primary operational amplifier, the voltage signal subjected to the primary operational amplification is transmitted to the comparator and is compared with a reference potential set by the comparator, the voltage signal output after the comparison is transmitted to the secondary operational amplifier, and the voltage signal subjected to the secondary operational amplification is output to the voltage/frequency conversion module;
wherein the first signal strength is greater than the second signal strength;
the comparator is connected with the input end of the voltage/frequency conversion module.
8. The apparatus for manufacturing a portable precision test instrument based on electronic equipment according to claim 6,
the operational amplifier is a multistage operational amplifier, and the stage number of the operational amplifier is selected according to the strength of the voltage signal converted by the strength/voltage conversion module;
the number of the level output modules in the circuit subjected to multistage operational amplification is the same as the number of stages of the operational amplifier, and each level output module corresponds to the voltage value of different gears respectively.
9. The apparatus for manufacturing a portable precision test instrument based on electronic equipment according to claim 6,
the sensor is an electric sensitive sensor, a thermal sensitive sensor, a photosensitive sensor, a gas sensitive sensor, a force sensitive sensor or a sound sensitive sensor.
10. The apparatus for manufacturing a portable precision test instrument based on electronic equipment according to claim 6,
the intensity/voltage conversion module is a resistance/voltage conversion module, a current/voltage conversion module, a power/voltage conversion module, a capacitance/voltage conversion module or an inductance/voltage conversion module.
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