CN207557327U - Digital multimeter with NVC functions - Google Patents
Digital multimeter with NVC functions Download PDFInfo
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- CN207557327U CN207557327U CN201721232499.4U CN201721232499U CN207557327U CN 207557327 U CN207557327 U CN 207557327U CN 201721232499 U CN201721232499 U CN 201721232499U CN 207557327 U CN207557327 U CN 207557327U
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- indicator light
- voltage
- digital multimeter
- control chip
- nvc
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Abstract
The utility model discloses a kind of digital multimeter of band NVC functions, the digital multimeter of the band NVC functions includes housing, circuit board, control chip and non-contact voltage exploring antenna, the circuit board and control chip are arranged in the housing, the control chip is set on the circuit board, the non-contact voltage exploring antenna is electrically connected with the circuit board, the front end of the housing is equipped with skull, the outer end of the skull is equipped with pillar, the inner end of the pillar is formed with opening, the non-contact voltage exploring antenna is stretched to by the opening in the pillar.The utility model can realize reflect to quicklook when non-contact voltage detects non-contact voltage detection position, so as to avoid the generation of safety accident and improve non-contact voltage detection accuracy.
Description
Technical field
The utility model is related to electrical detection technique field, more particularly to a kind of digital multimeter of band NVC functions.
Background technology
At present, the measurement of electric measurement is increasingly valued by the people safely.Currently, the U.S. averagely has 9,000 daily
Worker is caused injury residual in electric measurement work, and it is all since worker is to electric measurement work to occur for more than 80% the reason of accident
Caused by the maloperation of tool.In the prior art, when multimeter band non-contact voltage detects, the antenna of non-contact voltage detection
It is to be hidden in the housing of multimeter, position unobvious, when measurement easily causes safety accident, is surveyed when looking for not to measuring position
Amount result easily generates large error, and confirms the size of voltage typically only by the voltage value on display screen is read,
Can not quicklook reflecting voltage power, when user find voltage it is too strong when it is late, be also easy to cause peace
The generation of full accident.
Utility model content
The main purpose of the utility model is that provide a kind of digital multimeter of band NVC functions, it is intended to realize and be connect non-
Reflect to quicklook the position of non-contact voltage detection when touching voltage detection, so as to avoid the generation of safety accident and improve non-
The accuracy of contact voltage detection.
To achieve these goals, the utility model provides a kind of digital multimeter of band NVC functions, the digital versatile
Table includes housing, circuit board, control chip and non-contact voltage exploring antenna, and the circuit board and control chip are arranged at institute
It states in housing, the control chip is set on the circuit board, and the non-contact voltage exploring antenna and the circuit board are electrical
Connection, the front end of the housing are equipped with skull, and the outer end of the skull is equipped with pillar, and the inner end of the pillar is formed with opening,
The non-contact voltage exploring antenna is stretched to by the opening in the pillar.
Preferably, it on skull and with skull is to be integrally formed to be formed that the pillar, which is direct protrusion,；Or the pillar
For with the separable separate part of the skull.
Preferably, the outer end protrusion of the pillar is formed with NCV sensing symbols.
Preferably, the digital multimeter further comprises simulating indicator lamp groups, the simulation indicator lamp groups and the control
Coremaking piece is electrically connected, and the housing corresponds to the simulation indicator lamp groups and is provided with simulation indicating window, the simulation indicator lamp groups
Including at least two indicator lights, the control chip is for strong according to the voltage detected when carrying out non-contact voltage detection
Weak, the indicator light of the bright respective numbers in control point is strong and weak to simulate instructed voltage.
Preferably, buzzer is further included, the buzzer is electrically connected with the control chip, and the control chip is also used
In the buzzer being controlled to send out corresponding frequencies and size according to the voltage power that is detected when non-contact voltage is detected
Alarm song carrys out instructed voltage power.
Preferably, the indicator light is in transversely arranged, and the digital multimeter further includes light-strip, and the light-strip corresponds to
There are two light-guiding pillars for each indicator light formation, and the simulation indicating window corresponds to the formation of each light-guiding pillar, and there are one go out optical window
Mouthful.
Preferably, the quantity of the indicator light is three, and three indicator lights are suitable by from left to right or from right to left
Sequence distinguishes the first indicator light, the second indicator light and third indicator light, senses alternating current impression electricity by non-contact voltage exploring antenna
Pressure, when the first predeterminated voltage ＜ induced voltages≤second predeterminated voltage, the control chip controls light the first indicator light；When
During the second predeterminated voltage ＜ induced voltages≤third predeterminated voltage, the control chip controls are lighted the first indicator light and second and are referred to
Show lamp；Work as induced voltage>During third predeterminated voltage, the control chip controls light the first indicator light, the second indicator light and the
Three indicator lights.
Preferably, first indicator light, the color of the second indicator light and third indicator light when lighting be respectively green,
Green and yellow or respectively green, yellow and red or respectively yellow, yellow and red.
Preferably, the quantity of the indicator light is three, and the control chip is DTM0660, and three indicator lights divide
Do not carry out lighting control by the pin PT1.4 of DTM0660, pin PT1.2 and pin PT3.7.
Preferably, the housing includes face-piece and bottom case, and the face-piece is equipped with display screen, button, knob and multiple defeated
Enter socket, the display screen, button, knob and multiple input socket are arranged in order to the back-end by the front end of housing, the simulation
Indicating window is set on the face-piece and is located at the front end of the display screen, the skull is the component being separately separated, and passes through face-piece
It is fixed with bottom case combination.
The digital multimeter of the band NVC functions of the utility model forms pillar, non-contact electricity by the outer end for being located at skull
Pressure exploring antenna is stretched in pillar, so that the position of non-contact voltage detection becomes apparent from, and is carrying out non-contact voltage spy
More safety with intuitively, when non-contact voltage detects, can be quickly found the position of non-contact voltage exploring antenna NCV during survey
It puts rather than goes to attempt with other positions so that measure accuracy higher that is safer, and measuring.
Description of the drawings
Fig. 1 is the three-dimensional assembly diagram of digital multimeter one embodiment of the utility model with NVC functions.
Fig. 2 is the rear view of the digital multimeter with NVC functions shown in Fig. 1.
Fig. 3 is the explosive view of the digital multimeter with NVC functions shown in Fig. 1.
Fig. 4 is face-piece and its further explosive view of mounting assembly in the digital multimeter with NVC functions shown in Fig. 3.
Fig. 5 is bottom case and its further explosive view of mounting assembly in the digital multimeter with NVC functions shown in Fig. 3.
Fig. 6 is the explosive view of the digital multimeter with NVC functions shown in Fig. 5.
Fig. 7 is face-piece and its further explosive view of mounting assembly in the digital multimeter with NVC functions shown in Fig. 6.
Fig. 8 is bottom case and its further explosive view of mounting assembly in the digital multimeter with NVC functions shown in Fig. 6.
Fig. 9 is the circuit control block diagram of the digital multimeter with NVC functions shown in Fig. 1.
Figure 10 is the physical circuit figure of one application examples of circuit control block diagram shown in Fig. 9.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
It should be appreciated that the specific embodiments described herein are only used to explain the utility model, it is not used to limit
The utility model.
The utility model provides a kind of digital multimeter of band NVC functions.As shown in Figures 1 to 10, in the utility model
An embodiment in, the digital multimeter with NVC functions include housing 1, circuit board 2, control chip 3, non-contact voltage detection
Antenna NCV and simulation indicator lamp groups 5.The circuit board 2, control chip 3 and simulation indicator lamp groups 5 are arranged at the housing
In 1, the control chip 3 is set on the circuit board 2 and (control chip 3 is not shown in Fig. 3 and Fig. 6) and indicated with the simulation
Lamp group 5 is electrically connected (referring to Fig. 9), and the non-contact voltage exploring antenna NCV is electrically connected with the circuit board 2, the shell
Body 1 corresponds to the simulation indicator lamp groups 5 and is provided with simulation indicating window 11, and the simulation indicator lamp groups 5 include at least two instructions
Lamp 51, the control chip 3 are used for strong and weak, the control according to the voltage detected when carrying out non-contact voltage (NCV) and detecting
The indicator light 51 of respective numbers is lighted to simulate instructed voltage power.
In the digital multimeter of the band NVC functions, by outfit simulate indicator lamp groups, difference shine by way of come
Instructed voltage is strong and weak, more intuitive to the prompting of dangerous voltage, can be fast in the case of without voltage measurements reading
It is whether dangerous that voltage is perceived fastly, it is ensured that the personal safety of survey crew.
In the present embodiment, the front end of the housing 1 is equipped with skull 12, and the outer end of the skull 12 is equipped with pillar 121, institute
The inner end for stating pillar 121 is formed with opening 122, and the non-contact voltage exploring antenna NCV stretches to institute by the opening 122
It states in pillar 121, so that the position of non-contact voltage detection becomes apparent from, safer when carrying out non-contact voltage detection
With it is intuitive, when non-contact voltage detects, can be quickly found non-contact voltage exploring antenna NCV position rather than use
Other positions go to attempt so that measure accuracy higher that is safer, and measuring.In addition, the outer end of the pillar 121 is convex
Go out to be formed with NCV sensing symbols 122, in order to the position of definitely non-contact voltage exploring antenna NCV, that is, what is embodied is this
There is contactless voltage induced function in a 121 position of pillar.The pillar 121 is used for intuitive judgment energized conductor, and function refers to
The property shown is definitely, bright without the 12 blind search non-contact voltage exploring antenna NCV positions of skull with entire digital multimeter
Really specify the functional location.
In the present embodiment, it on skull 12 and with skull 12 is to be integrally formed to be formed that the pillar 121, which is direct protrusion,.
In other embodiments, it can also be that pillar 121 is and 12 separable separate part of skull.The pillar 121 can be
Arbitrary shape, such as cylindrical, rectangular etc..
The luminescent color of at least two indicator lights 51 when lighting can be identical or differs.It is identical in luminescent color
When, control chip 3 is used to may be used a little according to the voltage power detected when carrying out non-contact voltage (NCV) and detecting
The indicator light 51 of bright different number is strong and weak to distinguish voltage, and voltage is stronger, then the quantity of indicator light 51 lighted is more, and voltage is got over
Weak, then the quantity of indicator light 51 lighted is fewer, and does not light any indicator light 51 less than a setting value in voltage.
When luminescent color differs, it may be used and light the indicator light 51 of different colours to distinguish voltage power, such as green indicator light
Represent that voltage strength is general, red indicating light represents that voltage is stronger, it should be noted that personal safety.It is lighted alternatively, it is also possible to use
It is weaker that the quantity mode combined with lighting color carrys out instructed voltage.
As a further improvement, the control chip 3 is additionally operable to when switching to the test of zero firewire, the bright respective counts in control point
The indicator light 51 of amount indicates that measured conductor is zero curve or firewire to simulate.For example, when it is firewire to detect measured conductor, it is described
Control chip 3 controls all indicator lights 51 to light；When it is zero curve to detect measured conductor, control chip 3 control is extinguished
All indicator lights 51.It is of course also possible to use other lighting modes, such as luminescent color when indicator light 51 is lighted not phase
With in the case of, use and light the indicator light 51 of different colours to indicate instruction measured conductor as zero curve or firewire, for example, by using
It is zero curve to light green indicator light instruction measured conductor, uses and lights red indicating light instruction measured conductor as firewire.
In the present embodiment, when it is firewire to detect measured conductor, the control chip 3 controls all 51 points of indicator lights
It is bright；When it is zero curve to detect measured conductor, all indicator lights 51 are extinguished in control chip 3 control, i.e., do not light any finger
Show lamp 51.
As a further improvement, the control chip 3 is additionally operable to when switching on off test, the bright respective numbers in control point
Indicator light 51 come simulate instruction measured conductor be unicom or non-unicom.When carrying out on off test, it is less than first when measuring resistance
Preset resistive value, such as at 30 ohm, represents that break-make is good, and control chip 3 control is lighted the first indicator light 51 and second and referred to
Show lamp 51；It is the second preset resistive value, such as at 40~60 ohm when measuring resistance, representing break-make, there may be problem, the controls
Third indicator light 51 is lighted in the control of coremaking piece 3；It is more than third preset resistive value, such as at 60 ohm when measuring resistance, representative does not join
Logical, the first indicator light 51, the second indicator light 51 and third indicator light 51 are extinguished in control chip 3 control.
As a further improvement, the digital multimeter with NVC functions further includes buzzer BUZ, the buzzer BUZ and institute
It states control chip 3 to be electrically connected, the control chip 3 is additionally operable to strong according to the voltage detected when non-contact voltage is detected
Buzzer BUZ described in weak domination sends out corresponding frequencies and the alarm song of size carrys out instructed voltage power.For example, as voltage is by weak
To it is strong when, the volume of the alarm of buzzer BUZ increases therewith and/or the frequency of the alarm of buzzer BUZ increases therewith.
As a further improvement, the control chip 3 is additionally operable to the buzzer BUZ be controlled to send out when zero firewire is tested
The alarm song of corresponding frequencies and size come indicate measured conductor be zero curve or firewire.For example, when being zero curve, buzzer BUZ is sent out
Faint alarm；During for firewire, buzzer BUZ sends out the strong alarm of high-frequency.
As a further improvement, the control chip 3 is additionally operable to that the buzzer BUZ is controlled to send out phase on off test
The alarm song of frequency and size is answered to indicate that measured conductor is unicom or non-unicom.For example, when being unicom, buzzer BUZ is sent out
Faint alarm；During for not unicom, buzzer BUZ sends out the strong alarm of high-frequency.
Alarm forms of the above-mentioned buzzer BUZ when non-contact voltage detection, on off test and zero firewire are tested can phase
Mutually it is applied in combination or is used alone.
In the present embodiment, the quantity of the indicator light 51 is for three and in transversely arranged.Indicator light 51 is LED, and three
Indicator light 51 has been collectively formed in same LED light bar.In other embodiments, three indicator lights 51 can also be separated
Single led lamp, in addition, the quantity of indicator light 51 can also be two or more than three.
In the present embodiment, the digital multimeter of the band NVC functions further includes light-strip 7, and the light-strip 7 corresponds to often
There are two light-guiding pillars 71 for one formation of indicator light 51, and there are one simulation indicating window 11 correspondence each light-guiding pillar 71 formation goes out
Light window 111.In this way, showing lamp 51 by three, the effect of six lamps can be realized.
Three indicator lights 51 distinguish the first indicator light 51, the second indicator light by sequence from left to right or from right to left
51 and third indicator light 51, ac induction voltage is sensed by non-contact voltage exploring antenna NCV, when the first predeterminated voltage (example
Such as 12V) ＜ induced voltages≤second predeterminated voltage (such as 50V) when, voltage is relatively low, it is described control chip 3 control lights
First indicator light 51；As the second predeterminated voltage (such as 50V) ＜ induced voltages≤third predeterminated voltage (such as 90V), voltage
Relatively high, the first indicator light 51 and the second indicator light 51 are lighted in control chip 3 control；Work as induced voltage>Third is preset
During voltage (such as 90V), voltage is very high, and the first indicator light 51, the second indicator light 51 and the are lighted in control chip 3 control
Three indicator lights 51, to reach strong intuitive warning function.
In the present embodiment, the face of first indicator light 51, the second indicator light 51 and third indicator light 51 when lighting
Color is respectively green, green and yellow.In other embodiments, the first indicator light 51, the second indicator light 51 and third indicator light
51 it is also an option that be other colors when lighting, it is not limited to the present embodiment.For example, the first indicator light 51, second refers to
Show lamp 51 and third indicator light 51 respectively green, yellow and red or respectively yellow, yellow and red.
In the present embodiment, three indicator lights 51 distinguish the first indicator light by sequence from left to right or from right to left
51st, the second indicator light 51 and third indicator light 51, when carrying out on off test, when measuring resistance less than 30 ohm, the control
The first indicator light 51 and the second indicator light 51 are lighted in the control of chip 3；When measuring resistance at 40~60 ohm, the control chip
Third indicator light 51 is lighted in 3 controls；When measuring resistance more than 60 ohm, the first indicator light is extinguished in control chip 3 control
51st, the second indicator light 51 and third indicator light 51, however, preset voltage value is not so limited during on off test.
As a further improvement, the digital multimeter with NVC functions, which further includes headlamp LS, the headlamp LS, is set on shell
The back side of body 1, the housing 1 are equipped with the button H/B that the headlamp LS is controlled to open and close.It is covered on headlamp LS
Lampshade 82.
Digital multimeter with NVC functions further includes the protective case 9 being set on the housing 1, and the protective case 9 corresponds to
The headlamp LS is equipped with through-hole 91.
The housing 1 includes face-piece 13 and bottom case 14, and the face-piece 13 is equipped with display screen 131, button SEL, knob 133
With multiple input socket 134/135/136/137, the display screen 131, button SEL, knob 133 and multiple input socket 134/
135/136/137 is arranged in order to the back-end by the front end of housing 1, and the simulation indicating window 11 is set on the face-piece 13 and is located at
The front end of the display screen 131.
In the present embodiment, skull 12 is the component being separately separated, and is fixed by face-piece 13 and the combination of bottom case 14, from
And form a kind of independent function of protrusion.
The bottom case 14 is equipped with battery tray 141, and for placing battery 142, the outside of the bottom case is equipped with battery cover
143, the outside of the battery cover 143 is articulated with stent 144.
Non-contact voltage detecting function is by the gear switch of knob 133, also or is directly to pass through digital multimeter
On function button SEL open non-contact voltage detecting function.The induced voltage range of non-contact voltage exploring antenna NCV exists
12-1000V, can by the function gear switches of function button SEL either knobs 133 into bottom sensitivity be 48-1000V
Voltage induced range.
Figure 10 is the physical circuit figure of one application examples of circuit control block diagram shown in Fig. 9, in the application examples, controls chip 3
For DTM0660, three indicator lights are respectively to be indicated using LED1, LED2, LED3 in Figure 10, and buzzer BUZ marks, headlamp is adopted
It is indicated with LS, non-contact voltage exploring antenna is indicated using NCV, and COM, V/ Ω/Cap/DT/ is respectively adopted in four input sockets
MV/Hz/Temp, A/mA, 10A are indicated.
Three indicator lights LED1, LED2, LED3 pass through the pin PT1.4 of DTM0660, pin PT1.2 and pin respectively
PT3.7 carries out lighting control.Buzzer BUZ is controlled by the pin PT1.7 of DTM0660, the pin that headlamp passes through DTM0660
PT2.2 is controlled.
The utility model is not limited to embodiment of above, under technology contents disclosed in the above embodiment, may be used also
To carry out various change.Every equivalent structure transformation made based on the specification and figures of the utility model or directly or
Other related technical areas are used in indirectly, are equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of digital multimeter of band NVC functions, which is characterized in that the digital multimeter includes housing, circuit board, control
Chip and non-contact voltage exploring antenna, the circuit board and control chip are arranged in the housing, the control chip
On the circuit board, the non-contact voltage exploring antenna is electrically connected with the circuit board, and the front end of the housing is set
There is skull, the outer end of the skull is equipped with pillar, and the inner end of the pillar is formed with opening, the non-contact voltage exploring antenna
It is stretched in the pillar by the opening.
2. the digital multimeter as described in claim 1 with NVC functions, which is characterized in that the pillar is that direct protrusion exists
It is to be integrally formed to be formed on skull and with skull；Or the pillar is and the separable separate part of the skull.
3. the digital multimeter as described in claim 1 with NVC functions, which is characterized in that the outer end protrusion shape of the pillar
Sense symbol into there is NCV.
4. the digital multimeter as described in claim 1 with NVC functions, which is characterized in that the digital multimeter is further
Including simulating indicator lamp groups, the simulation indicator lamp groups are electrically connected with the control chip, and the housing corresponds to the simulation
Indicator lamp groups are provided with simulation indicating window, and the simulation indicator lamp groups include at least two indicator lights, and the control chip is used for
Strong and weak according to the voltage detected when carrying out non-contact voltage detection, the indicator light of the bright respective numbers in control point refers to simulate
Show voltage power.
5. the digital multimeter of the band NVC functions as described in any one in Claims 1-4 item, which is characterized in that further include
Buzzer, the buzzer are electrically connected with the control chip, and the control chip is additionally operable to when non-contact voltage detects
The buzzer is controlled to send out the alarm song of corresponding frequencies and size come instructed voltage power according to the voltage power detected.
6. digital multimeter with NVC functions as claimed in claim 4, which is characterized in that the indicator light be in it is transversely arranged,
The digital multimeter further includes light-strip, and the light-strip corresponds to each indicator light formation, and there are two light-guiding pillar, the moulds
Intend indicating window and correspond to light-emitting window there are one the formation of each light-guiding pillar.
7. the digital multimeter as claimed in claim 6 with NVC functions, which is characterized in that the quantity of the indicator light is three
, by sequence from left to right or from right to left, the first indicator light, the second indicator light and third refer to three indicator lights respectively
Show lamp, ac induction voltage is sensed by non-contact voltage exploring antenna, when the first predeterminated voltage ＜ induced voltage≤the second is pre-
If during voltage, the control chip controls light the first indicator light；When the second predeterminated voltage ＜ induced voltages≤third presets electricity
During pressure, the control chip controls light the first indicator light and the second indicator light；Work as induced voltage>During third predeterminated voltage, institute
It states control chip controls and lights the first indicator light, the second indicator light and third indicator light.
8. the digital multimeter as claimed in claim 7 with NVC functions, which is characterized in that first indicator light, second refer to
Show that the color of lamp and third indicator light when lighting is respectively green, green and yellow or is respectively green, yellow and red
Color or respectively yellow, yellow and red.
9. the digital multimeter as claimed in claim 4 with NVC functions, which is characterized in that the quantity of the indicator light is three
, the control chip is DTM0660, three indicator lights respectively by the pin PT1.4 of DTM0660, pin PT1.2 and
Pin PT3.7 carries out lighting control.
10. the digital multimeter as claimed in claim 4 with NVC functions, which is characterized in that the housing includes face-piece and bottom
Shell, the face-piece are equipped with display screen, button, knob and multiple input socket, the display screen, button, knob and multiple defeated
Enter socket to be arranged in order to the back-end by the front end of housing, the simulation indicating window is set on the face-piece and positioned at the display screen
Front end, the skull is the component being separately separated, by face-piece and bottom case combination be fixed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895158 | 2017-07-21 | ||
| CN2017208951589 | 2017-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207557327U true CN207557327U (en) | 2018-06-29 |
Family
ID=62676635
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721229081.8U Active CN207798915U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with simulation instruction function |
| CN201721227275.4U Active CN207798914U (en) | 2017-07-21 | 2017-09-22 | Multi-functional digital multimeter |
| CN201721232499.4U Active CN207557327U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with NVC functions |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721229081.8U Active CN207798915U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with simulation instruction function |
| CN201721227275.4U Active CN207798914U (en) | 2017-07-21 | 2017-09-22 | Multi-functional digital multimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN207798915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI683109B (en) * | 2018-11-16 | 2020-01-21 | 瑞星科技股份有限公司 | Measuring rod for electric meter and electric meter assembly using the same |
-
2017
- 2017-09-22 CN CN201721229081.8U patent/CN207798915U/en active Active
- 2017-09-22 CN CN201721227275.4U patent/CN207798914U/en active Active
- 2017-09-22 CN CN201721232499.4U patent/CN207557327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI683109B (en) * | 2018-11-16 | 2020-01-21 | 瑞星科技股份有限公司 | Measuring rod for electric meter and electric meter assembly using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN207798914U (en) | 2018-08-31 |
| CN207798915U (en) | 2018-08-31 |
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Effective date of registration: 20190430 Address after: 541105 Yangtang Industrial Park, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Patentee after: Guilin Huayi Intelligent Measurement Technology Co., Ltd. Address before: 518110 3rd floor, 2nd building, 306 Guiyue Road, Guanlan Beitou Community, Longhua New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Hua measurement Yizhi Polytron Technologies Inc |