CN110907943A - Infrared distance measurement automatic analyzer and data analysis method - Google Patents
Infrared distance measurement automatic analyzer and data analysis method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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Abstract
The invention provides an infrared distance measurement automatic analyzer and a data analysis method, wherein the infrared distance measurement automatic analyzer comprises a distance detection module, a power supply module, a control module and an alarm module, wherein the output end of the distance detection module is electrically connected with the input end of the control module, the output end of the control module is electrically connected with the input end of the alarm module, and the power supply module respectively supplies power for the distance detection module, the control module and the alarm module; when the measured value exceeds a certain error range of the standard value, the control module drives the alarm module to alarm and remind a worker, the worker can perform secondary measurement on the point position according to the alarm information, and the working efficiency is effectively improved.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to an infrared distance measurement automatic analyzer and a data analysis method.
Background
The infrared distance measuring instrument is classified into laser infrared, infrared and ultrasonic, and the laser infrared distance measuring instrument is mainly used at present.
In the building engineering, especially in the decoration engineering field, the frequency of use of infrared distance detector is very high, and hand-held type laser range finder not only is small, light in weight, detects the precision height moreover, has extensive practicality.
In the whole process of measuring the point location of the building, firstly, measuring personnel are required to record and arrange, then, comparison and analysis are carried out, finally, files containing data which possibly make mistakes during measurement are arranged, and then, workers go to a construction site to carry out measurement according to the arranged reports. The existing distance measuring instrument has no automatic error reporting function during measurement, so that the measurement work of workers is heavy, and the work efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an automatic infrared distance measuring analyzer and a data analysis method, which can give an alarm to a point position which is possibly measured wrongly during measurement to remind a worker to pay attention, thereby effectively reducing the probability of the worker arriving at a construction site again and improving the working efficiency.
The purpose of the invention is realized by the following technical scheme: an infrared distance measurement automatic analyzer comprises a distance detection module, a power supply module, a control module and an alarm module, wherein the output end of the distance detection module is electrically connected with the input end of the control module, the output end of the control module is electrically connected with the input end of the alarm module, and the power supply module is used for supplying power to the distance detection module, the control module and the alarm module respectively;
the distance detection module is used for detecting the distance of an object to be detected and transmitting the distance to the control module;
the control module is used for receiving the data collected by the distance detection module, comparing the collected data with a set threshold value, and driving an alarm device to give an alarm if the collected data exceeds the threshold value.
The distance detection module is used for measuring the point positions of the building and transmitting the obtained measured values to the control module, the control module compares the measured values on the corresponding point positions with preset standard values of the corresponding point positions, when the measured values exceed the standard values within a certain error range, the control module drives the alarm module to alarm to remind workers, the workers can perform secondary measurement on the point positions according to alarm information, and the working efficiency is effectively improved.
Further, the control module comprises a single chip microcomputer, a reset circuit and an oscillation circuit, wherein the oscillation circuit is respectively connected with an XTAL1 pin and an XTAL2 pin of the single chip microcomputer, and the reset circuit is connected with an RST pin of the single chip microcomputer.
The control module adopts a minimum system based on the single chip microcomputer, and comprises the single chip microcomputer, a reset circuit and an oscillating circuit, so that the working stability, the expandability and the circuit structure are high.
Further, the distance detection module includes: the infrared distance sensor and the data acquisition unit are connected with each other, the model of the data acquisition unit is PCF8591, and the model of the single chip microcomputer is STC89C 52;
the output end of the infrared distance sensor is electrically connected with the A/D sampling interface of the data collector, and the bus interface of the data collector is connected with the I/O port of the single chip microcomputer.
The adoption of the further scheme has the beneficial effects that the adoption of the infrared distance sensor has high measurement precision, strong anti-interference capability and low cost; the data acquisition device with the PCF8591 model is matched, the acquisition precision is improved, the power consumption is low, an IIC bus is connected with the single chip microcomputer, and the occupation of an I/O port is reduced.
Further, the alarm module comprises a buzzer, a first triode, a thirty-second resistor and a thirty-third resistor;
one end of the buzzer is connected with the positive electrode of a power supply through the thirty-third resistor, the other end of the buzzer is connected with the emitting electrode of the first triode, the base electrode of the triode is connected with the I/O port of the single chip microcomputer through the thirty-second resistor, and the collector electrode of the first triode is grounded.
The beneficial effect of adopting above-mentioned further scheme is that, when the measured value surpassed the scope of preset standard value, the singlechip with the IO mouth output low level that first triode base is connected, thereby first triode switches on leads to the buzzer and sends out the police dispatch newspaper.
Furthermore, the alarm module further comprises a thirty-first resistor and a first light emitting diode, one end of the thirty-first resistor is connected with the I/O port of the single chip microcomputer, the other end of the thirty-first resistor is connected with the cathode of the first light emitting diode, and the anode of the first light emitting diode is connected with the anode of the power supply.
The beneficial effect of adopting the above further scheme is that when the measured value exceeds the range of the preset standard value, the I/O port connected with the thirty-one resistor of the singlechip outputs low level, and the first light-emitting diode emits light to remind the staff.
Further, power module includes primary power and secondary power, the output of primary power with the input of secondary power is connected, the primary power does respectively buzzer, control module and infrared distance sensor power supply, the secondary power does the data collection station power supply.
The beneficial effect of adopting the above further scheme is that the PCF8591 needs to supply power independently, and the power module is divided into a primary power supply and a secondary power supply, so that the secondary power supply is used for supplying power to the PCF8591 independently, so that the stability is higher.
Further, the primary power supply includes three-terminal regulator chip, twenty-eight resistance, third electric capacity and the fourth electric capacity that the model is LM7805, the first pin of three-terminal regulator chip passes through twenty-eight resistance connection power positive pole, the third pin ground connection of three-terminal regulator chip, the second pin of three-terminal regulator chip with the one end of third electric capacity is connected, the other end of third electric capacity with the second pin of three-terminal regulator chip is connected, the fourth electric capacity with the third electric capacity parallel connection, the input of secondary power supply with the second pin of three-terminal regulator chip is connected.
The beneficial effect of adopting the above further scheme is that the primary power supply comprises a stabilized voltage power supply which is formed by adopting a three-terminal stabilized voltage chip with the model of LM7805 and outputs 5V voltage, the required peripheral elements are few, and a protection circuit for overcurrent, overheating and an adjusting tube is arranged in the circuit, so that the use is reliable and convenient, and the price is low.
Further, the secondary power supply comprises a voltage stabilizer with the model number of AMS1117-3.3, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor and a twenty-first resistor, wherein a third pin of the voltage stabilizer is connected with a first pin of the voltage stabilizer through the twentieth capacitor, a second pin of the voltage stabilizer is connected with one end of the twenty-first resistor, the other end of the twenty-first resistor is connected with one end of the twenty-third capacitor, and the other end of the twenty-third capacitor is grounded; one end of the twenty-second capacitor is connected with a joint of a second pin of the voltage stabilizer and the twenty-first pin, and the twenty-second capacitor is grounded.
The adoption of the further scheme has the advantages that the secondary power supply adopts a voltage stabilizer with the model of AMS1117-3.3 to convert 5V voltage into 3.3V voltage to supply power for the data acquisition unit, and has low voltage difference and low power consumption; and the twenty-first capacitor, the twenty-second capacitor and the twenty-third capacitor form pi-shaped filtering, and harmonic components are effectively reduced through multiple filtering effects.
Furthermore, the output end of the control module is also connected with a display.
The beneficial effect of adopting above-mentioned further scheme is that, the display can show the measured value, standard value and the error range of corresponding position for the measurement process is more directly perceived.
A method of data analysis comprising the steps of:
s1: receiving data, wherein the data comprises point locations and preset standard values;
s2: selecting a point location and measuring the point location to obtain a measured value;
s3: judging whether the measured value in the S2 meets the range of a preset standard value, if not, alarming, and if so, recording the measured value on a corresponding point position;
s4: recording the measured value which does not meet the standard value range in the S3 on the point, and marking;
s5: storing the data recorded in S3 and S4, and measuring the next point;
s6: and after all point locations are measured, forming a data table by the data of all the point locations measured this time, and sending the data table to the client.
The method has the advantages that the measured value is compared with the preset standard value, the alarm is given and the marking is carried out when the range which does not accord with the preset standard value, the user can conveniently retest the data on the corresponding point position, the record is carried out when the range which accords with the preset standard value accords with the preset measured value, the next point position is continuously measured until the measurement is finished, the data table is generated, the method is favorable for the user to visually observe the measured data, and the working efficiency is effectively improved.
Drawings
FIG. 1 is a diagram of an overall modular framework of the present invention;
FIG. 2 is a schematic diagram of the overall circuit structure according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a control module according to the present invention;
FIG. 4 is a circuit diagram of an alarm module of the present invention;
FIG. 5 is a circuit diagram of a power module according to the present invention;
FIG. 6 is a flow chart of a data analysis method according to the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Example 1
As shown in fig. 1, an infrared distance measurement automatic analyzer comprises a distance detection module, a power supply module, a control module and an alarm module, wherein an output end of the distance detection module is electrically connected with an input end of the control module, an output end of the control module is electrically connected with an input end of the alarm module, and the power supply module supplies power to the distance detection module, the control module and the alarm module respectively; the distance detection module is used for detecting the distance of the object to be detected and transmitting the distance to the control module; the control module is used for receiving the data collected by the distance detection module, comparing the collected data with a set threshold value, and driving the alarm device to give an alarm if the collected data exceeds the threshold value.
The point location of building is measured and the measured value that will acquire is transmitted to control module through distance detection module, and control module compares the measured value on the corresponding point location with the standard value of the corresponding point location of presetting, and when the measured value exceeded the certain error range of standard value, control module then drives alarm module and reports to the police and reminds the staff, and the staff can carry out the secondary according to alarm information to this point location and measure, effectively improves work efficiency.
The control module comprises a single chip microcomputer, a reset circuit and an oscillating circuit, the oscillating circuit is connected with an XTAL1 pin and an XTAL2 pin of the single chip microcomputer respectively, and the reset circuit is connected with an RST pin of the single chip microcomputer. The control module adopts a minimum system based on a single chip microcomputer, comprises the single chip microcomputer, a reset circuit and an oscillating circuit, and is stable in work, high in expandability and simple in circuit structure.
The distance detection module includes: the infrared distance sensor and the data acquisition unit with the model of PCF8591 are connected with each other, and the model of the single chip microcomputer is STC89C 52; the output end of the infrared distance sensor is electrically connected with the A/D sampling interface of the data acquisition unit, and the bus interface of the data acquisition unit is connected with the I/O port of the singlechip. The infrared distance sensor has high measurement precision, strong anti-interference capability and low cost; the data acquisition device with the PCF8591 model is matched, the acquisition precision is improved, the power consumption is low, an IIC bus is connected with the single chip microcomputer, and the occupation of an I/O port is reduced.
In a specific implementation, as shown in fig. 3, the control module adopts a minimum system based on STC89C52, and includes a reset circuit and an oscillation circuit, the reset circuit is connected to the ninth pin RST of the STC89C52 chip, the oscillation circuit includes a first crystal oscillator Y1, and two ends of the first crystal oscillator Y1 are respectively connected to the eighteenth pin XTAL2 and the nineteenth pin XTAL1 of the STC89C52 chip. As shown in fig. 2, the SCL pin and the SDA pin of the data acquisition device are respectively connected to the first pin P1.0 and the second pin P2.0 of the single chip, the infrared sensor uses an infrared distance sensor produced by GP2Y0a02YKOF sharp company, and has strong stability and interference immunity, and the sensor is composed of a position sensitive detector, an infrared emitting diode, a signal processing circuit and the like, and can convert the position information of a target into a corresponding analog signal for output. As shown in fig. 4, the alarm module includes a buzzer B1, a first triode G1, a thirty-second resistor R32, and a thirty-third resistor R33; one end of a buzzer B1 is connected with the positive electrode of a power supply through a thirteenth resistor R33, the other end of the buzzer B1 is connected with the emitting electrode of a first triode G1, the base electrode of the triode G1 is connected with the I/O port of an STC89C52 chip through a twelfth resistor R32, and the collector electrode of the first triode G1 is grounded.
In this embodiment, the base of the transistor G1 is connected to the seventh pin P1.6 of the STC89C52 chip via the third twelve resistor R32, and when the measured value exceeds the preset standard value, the seventh pin P1.6 of the STC89C52 chip outputs a low level, and the first transistor G1 is turned on, so that the buzzer B1 gives an alarm.
As shown in fig. 4, the alarm module further includes a thirty-first resistor R31 and a first light emitting diode D1, one end of the thirty-first resistor R31 is connected to the I/O port of the STC89C52 chip, the other end of the thirty-first resistor R31 is connected to the negative electrode of the first light emitting diode D1, and the positive electrode of the first light emitting diode D1 is connected to the positive electrode of the power supply.
In this embodiment, the thirty-first resistor R31 is connected to the eighth pin P1.7 of the STC89C52 chip, and when the measured value exceeds the preset standard value, and when the eighth pin P1.7 of the STC89C52 chip outputs a low level, the first light emitting diode D1 emits light to remind the operator.
The power module comprises a primary power supply and a secondary power supply, the output end of the primary power supply is connected with the input end of the secondary power supply, the primary power supply supplies power for the buzzer B1, the control module and the infrared distance sensor respectively, and the secondary power supply supplies power for the data acquisition unit. Because PCF8591 needs to supply power independently, the power module is divided into a primary power supply and a secondary power supply, and the secondary power supply is used for supplying power to PCF8591 independently, so that the stability is higher.
As shown in fig. 5, the primary power supply includes a three-terminal regulator chip with a model LM7805, a twenty-eighth resistor R28, a third capacitor C3, and a fourth capacitor C4, a first pin of the three-terminal regulator chip is connected to the positive electrode of the power supply through a second eighteen resistor R28, a third pin P3 of the three-terminal regulator chip is grounded, a second pin P2 of the three-terminal regulator chip is connected to one end of a third capacitor C3, the other end of the third capacitor C3 is connected to the second pin P2 of the three-terminal regulator chip, a fourth capacitor C4 is connected to the third capacitor C3 in parallel, and an input end of the secondary power supply is connected to the second pin P2 of the three-terminal regulator chip.
The primary power supply comprises a voltage-stabilized power supply formed by a three-terminal voltage-stabilized chip with the model of LM7805, 5V voltage is output, few peripheral elements are needed, and a protection circuit for overcurrent, overheating and an adjusting tube is arranged in the circuit, so that the primary power supply is reliable and convenient to use and low in price.
The secondary power supply comprises a voltage stabilizer with the model number of AMS1117-3.3, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22 and a twenty-first resistor R21, a third pin P3 of the voltage stabilizer is connected with a first pin P1 of the voltage stabilizer through a twentieth capacitor C20, a second pin P2 of the voltage stabilizer is connected with one end of the twenty-first resistor R21, the other end of the twenty-first resistor R21 is connected with one end of the twenty-third capacitor C23, and the other end of the twenty-third capacitor C23 is grounded; one end of the twenty-second capacitor C22 is connected to the junction of the second pin P2 and the twenty-first pin of the voltage regulator, and the twenty-second capacitor C22 is grounded.
The secondary power supply adopts AMS1117-3.3 to convert 5V voltage into 3.3V voltage to supply power for the data acquisition unit, and has low voltage difference and low power consumption; moreover, the twenty-first capacitor C21, the twenty-second capacitor C22 and the twenty-third capacitor C23 form pi-shaped filtering, and harmonic components are effectively reduced through multiple filtering effects.
As shown in fig. 2, the output end of the control module is also connected with a display. The display can display the measured value, the standard value and the error range of the corresponding point position, so that the measuring process is more visual. In specific implementation, the display screen may use the LCD1602, and may also have an extended memory, a keyboard, etc.
In this embodiment, the input end of the control module is further connected to a wireless transmission module, and the wireless transmission module is used for communicating with the client. Set up wireless transmission module and communicate with the customer end, the customer end can be cell-phone APP, computer etc., and wireless transmission module can use in wifi, bluetooth, GPRS, zigBee one or more, can use the customer end to control module input point position and standard value, and control module also can send measuring data etc. to the customer end.
A method of data analysis comprising the steps of:
s1: receiving data, wherein the data comprises point locations and preset standard values;
s2: selecting a point location and measuring the point location to obtain a measured value;
s3: judging whether the measured value in the S2 meets the range of a preset standard value, if not, alarming, and if so, recording the measured value on a corresponding point position;
s4: recording the measured value which does not meet the standard value range in the S3 on the point, and marking;
s5: storing the data recorded in S3 and S4, and measuring the next point;
s6: and after all point locations are measured, forming a data table by the data of all the point locations measured this time, and sending the data table to the client.
Wherein, the data received in S1 uses the cell phone APP, the infrared distance sensor is used for measuring the position in S2, S6 sends the position to the cell phone APP through wireless transmission, the marker in S4, for example: highlighting, underlining, etc., as shown in fig. 6, is a flow chart of a data analysis method of the present invention.
The measured value is compared with a preset standard value, the alarm is given and the marking is carried out within the range which is not in accordance with the preset standard value, so that convenience is brought to a user to retest data on corresponding point positions, the record is carried out if the measured value is in accordance with the preset standard value, the next point position is continuously measured until the measurement is completed, a data table is generated, the intuitive observation of the measured data by the user is facilitated, and the working efficiency is effectively improved.
The implementation principle of the invention is as follows: transmit the position and the standard value that corresponds the position to control module through cell-phone app through wireless transmission module, measure the position of building again and save in control module, control module compares the value of measuring on corresponding position with the standard value of presetting, show information such as measured value, standard value and error band simultaneously on liquid crystal display, when the measured value exceeds the certain error band of standard value, the seventh pin P1.6 of singlechip exports low level buzzer B1 and sends out the police dispatch newspaper, eighth pin P1.7 then exports the low level, first emitting diode D1 is luminous, remind the staff.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An infrared distance measurement automatic analyzer is characterized by comprising a distance detection module, a power supply module, a control module and an alarm module, wherein the output end of the distance detection module is electrically connected with the input end of the control module, the output end of the control module is electrically connected with the input end of the alarm module, and the power supply module is used for supplying power to the distance detection module, the control module and the alarm module respectively;
the distance detection module is used for detecting the distance of an object to be detected and transmitting the distance to the control module;
the control module is used for receiving the data collected by the distance detection module, comparing the collected data with a set threshold value, and driving an alarm device to give an alarm if the collected data exceeds the threshold value.
2. The infrared ranging automatic analyzer as claimed in claim 1, wherein the control module comprises a single chip microcomputer, a reset circuit and an oscillation circuit, the oscillation circuit is respectively connected with an XTAL1 pin and an XTAL2 pin of the single chip microcomputer, and the reset circuit is connected with a RST pin of the single chip microcomputer.
3. An infrared ranging autoanalyzer according to claim 2 wherein said distance detection module comprises: the infrared distance sensor and the data acquisition unit are connected with each other, the model of the data acquisition unit is PCF8591, and the model of the single chip microcomputer is STC89C 52;
the output end of the infrared distance sensor is electrically connected with the A/D sampling interface of the data collector, and the bus interface of the data collector is connected with the I/O port of the single chip microcomputer.
4. The infrared distance measuring automatic analyzer as claimed in claim 3, wherein the alarm module comprises a buzzer, a first triode, a thirty-second resistor and a thirty-third resistor;
one end of the buzzer is connected with the positive electrode of a power supply through the thirty-third resistor, the other end of the buzzer is connected with the emitting electrode of the first triode, the base electrode of the triode is connected with the I/O port of the single chip microcomputer through the thirty-second resistor, and the collector electrode of the first triode is grounded.
5. The automatic infrared distance measuring analyzer as claimed in claim 4, wherein the alarm module further comprises a thirty-first resistor and a first light emitting diode, one end of the thirty-first resistor is connected to the I/O port of the single chip microcomputer, the other end of the thirty-first resistor is connected to the cathode of the first light emitting diode, and the anode of the first light emitting diode is connected to the anode of the power supply.
6. The automatic infrared distance measuring analyzer according to claim 5, wherein the power module comprises a primary power supply and a secondary power supply, an output end of the primary power supply is connected with an input end of the secondary power supply, the primary power supply supplies power to the buzzer, the control module and the infrared distance sensor, and the secondary power supply supplies power to the data collector.
7. The infrared distance measuring automatic analyzer as claimed in claim 6, wherein the primary power supply comprises a three-terminal voltage stabilization chip with model number LM7805, a twenty-eighth resistor, a third capacitor and a fourth capacitor, a first pin of the three-terminal voltage stabilization chip is connected to a positive electrode of the power supply through the twenty-eighth resistor, a third pin of the three-terminal voltage stabilization chip is grounded, a second pin of the three-terminal voltage stabilization chip is connected to one end of the third capacitor, the other end of the third capacitor is connected to a second pin of the three-terminal voltage stabilization chip, the fourth capacitor is connected to the third capacitor in parallel, and an input end of the secondary power supply is connected to the second pin of the three-terminal voltage stabilization chip.
8. An infrared ranging automatic analyzer in accordance with claim 7,
the secondary power supply comprises a voltage stabilizer with the model number of AMS1117-3.3, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor and a twenty-first resistor, wherein a third pin of the voltage stabilizer is connected with a first pin of the voltage stabilizer through the twentieth capacitor, a second pin of the voltage stabilizer is connected with one end of the twenty-first resistor, the other end of the twenty-first resistor is connected with one end of the twenty-third capacitor, and the other end of the twenty-third capacitor is grounded; one end of the twenty-second capacitor is connected with a joint of a second pin of the voltage stabilizer and the twenty-first pin, and the twenty-second capacitor is grounded.
9. An infrared ranging automatic analyzer as claimed in any one of claims 1 to 8, characterized in that the output end of the control module is further connected with a display.
10. A method of data analysis, comprising the steps of:
s1: receiving data, wherein the data comprises point locations and preset standard values;
s2: selecting a point location and measuring the point location to obtain a measured value;
s3: judging whether the measured value in the S2 meets the range of a preset standard value, if not, alarming, and if so, recording the measured value on a corresponding point position;
s4: recording the measured value which does not meet the standard value range in the S3 on the point, and marking;
s5: storing the data recorded in S3 and S4, and measuring the next point;
s6: and after all point locations are measured, forming a data table by the data of all the point locations measured this time, and sending the data table to the client.
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| CN117060335A (en) * | 2023-10-12 | 2023-11-14 | 联合瓦特技术有限公司 | Generating set electricity generation emergency protection circuit |
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| CN102200558A (en) * | 2010-03-25 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Starting-up/shutdown detection circuit |
| CN205920569U (en) * | 2016-07-29 | 2017-02-01 | 安徽理工大学 | Single chip microcomputer control's intelligent locking device |
| CN109297442A (en) * | 2018-11-02 | 2019-02-01 | 宁德师范学院 | SCM Based wireless ultrasonic rangefinder |
| CN211653141U (en) * | 2019-12-30 | 2020-10-09 | 成都煜明装饰工程有限公司 | Infrared distance measurement automatic analyzer |
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| CN102200558A (en) * | 2010-03-25 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Starting-up/shutdown detection circuit |
| CN205920569U (en) * | 2016-07-29 | 2017-02-01 | 安徽理工大学 | Single chip microcomputer control's intelligent locking device |
| CN109297442A (en) * | 2018-11-02 | 2019-02-01 | 宁德师范学院 | SCM Based wireless ultrasonic rangefinder |
| CN211653141U (en) * | 2019-12-30 | 2020-10-09 | 成都煜明装饰工程有限公司 | Infrared distance measurement automatic analyzer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117060335A (en) * | 2023-10-12 | 2023-11-14 | 联合瓦特技术有限公司 | Generating set electricity generation emergency protection circuit |
| CN117060335B (en) * | 2023-10-12 | 2024-01-16 | 联合瓦特技术有限公司 | Generating set electricity generation emergency protection circuit |
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Application publication date: 20200324 |