CN202065010U - Multi-parameter intelligent on-line monitoring and adjusting alarm equipment - Google Patents
Multi-parameter intelligent on-line monitoring and adjusting alarm equipment Download PDFInfo
- Publication number
- CN202065010U CN202065010U CN2011200094231U CN201120009423U CN202065010U CN 202065010 U CN202065010 U CN 202065010U CN 2011200094231 U CN2011200094231 U CN 2011200094231U CN 201120009423 U CN201120009423 U CN 201120009423U CN 202065010 U CN202065010 U CN 202065010U
- Authority
- CN
- China
- Prior art keywords
- pin
- resistance
- processing unit
- central processing
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
Multi-parameter intelligent on-line monitoring and adjusting alarm equipment belongs to monitoring and adjusting alarm equipment for a coal mine refuge compartment, and includes a CPU, a power supply, a clock circuit, an operational amplification converter, an acousto-optical alarm, a display, a sensor and a reference power supply, wherein the power supply, the clock circuit, the operational amplification converter and the sensor are connected with the input end of the CPU; the acousto-optical alarm and the display are connected with the output end of the CPU; and the reference power supply is connected with the input end of the operational amplification converter. The utility model has the advantages that the multi-parameter intelligent on-line monitoring and adjusting alarm equipment can operate for an extra long term, can perform necessary vital signs detection on the to-be-rescued men in the refuge compartment and emit signals, and detects gas, oxygen, carbon monoxide, coal dust, temperature and humidity in the compartment and emits emergency signals in case of exceeding standard under the condition of power failure in the mine; the circuit design is simple, the coordinated application software program is convenient and simple, the entire volume is small, the functions are strong, and the operation aging is long in case of outage.
Description
Technical field
The utility model relates to a kind of mine rescue capsule and regulates warning device with monitoring, and particularly a kind of multi parameter intallingent type on-line monitoring is regulated warning device.
Background technology
At present, in the equipment in the domestic mine rescue capsule, include CH4, the O2 warning device, CO2 warning device, CO warning device, the coal dust warning device, warning device is regulated in temperature alarming equipment and vital signs monitoring, and described warning device all is independent, single equipment, and then combines in survival capsule, the usefull space that takies in the survival capsule is big, can not mate fully between each equipment, comprehensively yield poor results, the non-stop run time is short.
The utility model content
The purpose of this utility model is to provide a kind of multi parameter intallingent type on-line monitoring to regulate warning device, the usefull space that the solution warning device takies in the survival capsule is big, can not mate fully between each equipment, comprehensively yield poor results, the problem that the non-stop run time is short.
The purpose of this utility model is achieved in that this warning device comprises central processing unit, power supply, clock circuit, computing amplification converter, audible-visual annunciator, display, sensor and reference power supply, and power supply, clock module, computing amplification converter and sensor are connected with the input of central processing unit; Audible-visual annunciator is connected with the output of central processing unit with display; Reference power supply is connected with the input of computing amplification converter.
Described power supply has voltage-stabilized power supply and intrinsic safety electric source, and described voltage-stabilized power supply is made of voltage-stabilized power supply switch module IC1, resistance R 3, capacitor C 1 and capacitor C 2, and 3 pin of voltage-stabilized power supply switch module IC1 are connected with 7 pin of central processing unit by resistance R 3; Described intrinsic safety electric source comprises battery E, resistance R 0, diode D4, diode D3, resistance R 4 and resistance R 5, battery E is with after resistance R 0 is connected, the outer wrapping epoxide-resin glue constitutes the intrinsic safety battery pack, be connected in parallel between battery E and the resistance R 0 after resistance R 4 and resistance R 5 series connection, between resistance R 4 and resistance R 5, be connected with 5 pin of central processing unit by lead.
Described central processing unit has the multi-functional embedded microcontroller IC2 of low-power consumption, be integrated with functional modules such as AD module, TMR module, EEPROM data storage and FLASN program storage in microcontroller IC2 inside, form hardware circuit with the respective peripheral element, the fit applications software program is finished various controls of instrument and calculation function.
Described clock circuit is by IC 3, crystal oscillator JZ2 and capacitor C 7, capacitor C 8,21 pin, 22 pin of 7 pin of IC 3,6 pin and 5 pin and central processing unit and 23 pin are corresponding is connected, between 2 pin of IC 3 and 3 pin, be connected with crystal oscillator JZ2, between 2 pin of IC 3 and 4 pin and be connected with capacitor C 7, capacitor C 8 respectively between 3 pin and 4 pin.
Described computing amplification converter comprises computing IC 4-1 and IC4-2, the negative input end of computing IC 4-1 is connected with reference power supply, the positive input terminal of computing IC 4-1 is connected with 24 pin of central processing unit, the output of computing IC 4-1 is by triode U7, the colelctor electrode of triode U7 is connected with R21 with the resistance R of series connection 20, the output of methane transducer is connected with the positive and negative input of computing IC 4-2, and the output of computing IC 4-2 is connected with resistance; Described reference power supply comprises integrated circuit U8 and resistance R 17, resistance R 18 and resistance R 19, and the negative input end of IC 4-1 is connected between resistance R 18 and the resistance R 19, and 6 pin of central processing unit are connected between integrated circuit U8 and the resistance R 17; Producing 1.25V is connected with the methane transducer element circuit with central processing unit respectively with the 2.5V voltage reference.
Described audible-visual annunciator comprises triode U5, triode U6, diode D1, resistance R 16 and buzzer HA, 30 pin of central processing unit are connected with the base stage of triode U5 by diode D1, and triode U5 forms clad pipe with triode U6 and is connected with buzzer HA.
Described display comprises charactron LED, triode Q1, triode Q2, triode Q3 and triode Q4,36 pin of charactron LED and central processing unit, 37 pin, 38 pin, 39 pin, 41 pin, 42 pin, 43 pin, the corresponding connection of 44 pin; Shift knob S1, zero point adjust and alarm point is provided with that button S2 and full scale adjustment and multi-parameter show 25 pin, 26 pin of switching push button S3 and central processing unit and 27 pin are corresponding is connected.
Described sensor comprises methane transducer r and r0, oxygen sensor N, Rt, CO sensing module 4F-1000, temperature and humidity sensing module RHT03, infrared human body sensing module PIR, CO2 sensing module MS4100 and coal dust sensing module SPM4210, methane transducer r and r0 are connected between IC 4-1 and the IC 4-2; Oxygen sensor N, Rt is connected with 5 pin of central processing unit; CO sensing module 4F-1000 is connected with 8 pin of central processing unit; Temperature and humidity sensing module RHT03 is connected with 9 pin of central processing unit; Infrared human body sensing module PIR is connected with 10 pin of central processing unit, and CO2 sensing module MS4100 all is connected with 33 pin with 32 pin of central processing unit by communication module with coal dust sensing module SPM4210.
Beneficial effect, owing to adopted such scheme, this warning device can reach high temperature and carry out the online in real time monitoring, show, and to infiltrating the gas in the cabin, the CO coal dust be monitored the oxygen in the cabin, CO2 according to the needs of human body vital sign; Multiple spot infrared human body heat energy inductor, be arranged in the need control position of survival capsule, any one scope remains to be rescued personnel and exists, and can enter duty by automatic excitation device, and to the gas in the survival capsule, CO2, CO, O2, coal dust and temperature, humidity are carried out the online in real time monitoring, are shown, behind a certain index exceeding standard, the warning that gives the alarm is so that personnel carry out the necessary activity of saving oneself in the cabin; Instrument internal has the hardware circuit of a plurality of functional modules and corresponding peripheral cell compositional optimization, and the fit applications software program is finished various controls, computing and the communication function of instrument, and this instrument comprehensive function is strong, and cost is low, and the outage work limitation is long, easy to use; Instrument adopts low power consumption high-precision reference pressure stabilization power pipe to form voltage reference circuit, produces 1.25V and 2.5V voltage reference and supplies with controller and sensor unit circuitry use respectively, thereby improved accuracy of detection.It is big to have solved the usefull space that warning device takies in the survival capsule, can not mate fully between each equipment, comprehensively yield poor results, the problem that the non-stop run time is short, reached this this with novel purpose.
Advantage: can be under the mine powering-off state, continue uninterrupted long-term work more than 1440 hours, can rescue personnel to the quilt in the survival capsule carries out necessary vital signs detection and sends signal, simultaneously to the gas in the environment in the cabin, oxygen, carbon dioxide, carbon monoxide, coal dust, temperature, humidity detect, and send out an emergency signal under the state of exceeding standard.This instrument is according to comprehensive timeliness needs, select for use the high-power weak memory chargeable lithium cell of safe spark and flame-proof type as working power, circuit uses low-power consumption, multi-functional, embedded microcontroller composition hardware integrated circuit, circuit design is simple, the fit applications software program is convenient succinct, overall volume is little, and is powerful, and the outage work limitation is long.
Description of drawings
Fig. 1 block diagram of the present utility model.
Fig. 2 is a circuit structure diagram of the present utility model.
Among the figure, 1, central processing unit; 2, power supply; 3, clock circuit; 4, computing amplification converter; 5, audible-visual annunciator; 6, display; 7, sensor; 8, reference power supply.
The specific embodiment
Embodiment 1: this warning device comprises central processing unit 1, power supply 2, clock circuit 3, computing amplification converter 4, audible-visual annunciator 5, display 6, sensor 7 and reference power supply 8, and power supply 2, clock module 3 computing amplification converters 4 are connected with the input of sensor 7 with central processing unit 1; Audible-visual annunciator 5 is connected with the output of display 6 with central processing unit 1; Reference power supply 8 is connected with the input of computing amplification converter 4.
Described power supply has voltage-stabilized power supply and intrinsic safety electric source, and described voltage-stabilized power supply is made of voltage-stabilized power supply switch module IC1, resistance R 3, capacitor C 1 and capacitor C 2, and 3 pin of voltage-stabilized power supply switch module IC1 are connected with 7 pin of central processing unit by resistance R 3; Described intrinsic safety electric source comprises battery E, resistance R 0, diode D4, diode D3, resistance R 4 and resistance R 5, battery E is with after resistance R 0 is connected, the outer wrapping epoxide-resin glue constitutes the intrinsic safety battery pack, be connected in parallel between battery E and the resistance R 0 after resistance R 4 and resistance R 5 series connection, between resistance R 4 and resistance R 5, be connected with 5 pin of central processing unit by lead.
Described central processing unit has the multi-functional embedded microcontroller IC2 of low-power consumption, be integrated with functional modules such as AD module, TMR module, EEPROM data storage and FLASN program storage in microcontroller IC2 inside, form hardware circuit with the respective peripheral element, the fit applications software program is finished various controls of instrument and calculation function.
Described clock circuit is by IC 3, crystal oscillator JZ2 and capacitor C 7, capacitor C 8,21 pin, 22 pin of 7 pin of IC 3,6 pin and 5 pin and central processing unit and 23 pin are corresponding is connected, between 2 pin of IC 3 and 3 pin, be connected with crystal oscillator JZ2, between 2 pin of IC 3 and 4 pin and be connected with capacitor C 7, capacitor C 8 respectively between 3 pin and 4 pin.
Described computing amplification converter comprises computing IC 4-1 and IC4-2, the negative input end of computing IC 4-1 is connected with reference power supply, the positive input terminal of computing IC 4-1 is connected with 24 pin of central processing unit, the output of computing IC 4-1 is by triode U7, the colelctor electrode of triode U7 is connected with R21 with the resistance R of series connection 20, the output of methane transducer is connected with the positive and negative input of computing IC 4-2, and the output of computing IC 4-2 is connected with resistance; Described reference power supply comprises IC 8 and resistance R 17, resistance R 18 and resistance R 19, and the negative input end of IC 4-1 is connected between resistance R 18 and the resistance R 19, and 6 pin of central processing unit are connected between integrated circuit U8 and the resistance R 17; Producing 1.25V is connected with the methane transducer element circuit with central processing unit respectively with the 2.5V voltage reference.
Described audible-visual annunciator comprises triode U5, triode U6, diode D1, resistance R 16 and buzzer HA, 30 pin of central processing unit are connected with the base stage of triode U5 by diode D1, and triode U5 forms clad pipe with triode U6 and is connected with buzzer HA.
Described display comprises charactron LED, triode Q1, triode Q2, triode Q3 and triode Q4, the corresponding connection of 36 pin, 37 pin, 38 pin, 39 pin, 41 pin, 42 pin, 43 pin, 44 pin of charactron LED and central processing unit; Shift knob S1, zero point adjust and alarm point is provided with that button S2 and full scale adjustment and multi-parameter show 25 pin, 26 pin of switching push button S3 and central processing unit and 27 pin are corresponding is connected.
Described sensor comprises methane transducer r and r0, oxygen sensor N, Rt, CO sensing module 4F-1000, temperature and humidity sensing module RHT03, infrared human body sensing module PIR, CO2 sensing module MS4100 and coal dust sensing module SPM4210, methane transducer r and r0 are connected between IC 4-1 and the IC 4-2; Oxygen sensor N, Rt is connected with 5 pin of central processing unit; CO sensing module 4F-1000 is connected with 8 pin of central processing unit; Temperature and humidity sensing module RHT03 is connected with 9 pin of central processing unit, infrared human body sensing module PIR is connected with 10 pin of central processing unit, and CO2 sensing module MS4100 all is connected with 33 pin with 32 pin of central processing unit by communication module with coal dust sensing module SPM4210.
The all hardware circuit adopts surface mounting technology to be installed on the double-sided printed-circuit board, under the application program effect, instrument gets final product operate as normal, can continuous measurement methane, and oxygen, carbon dioxide, carbon monoxide, coal dust, parameters such as temperature, humidity, and send the sound and light alarm signal under the state of exceeding standard automatically, alarm point can be provided with in measurement category.
Owing to adopt the intrinsic safety battery pack; instrument can be used for the detection in explosion-proof place; instrument is provided with the low-voltage indication; under-voltage is shut down automatically, and circuit such as high protection prolong instrument application life; owing to adopt full surface mounting technology; apparatus structure is reasonable, and volume is little, is convenient to be installed in the cabin of Security Module.
This equipment is provided with standard signal testing result output interface, has possessed perfect post-processing function, can export intelligent control signal to the control appliance that disposes in the survival capsule, thus the dynamic movement of realization and lifesaving robot out of my cabin or sensates networking.
Make printed circuit board (PCB) according to circuit diagram, and adopt surface mounting technology to be installed on the circuit board all elements with reference to schematic diagram, adopt the 280U programmer that the application program of this instrument is solidificated in the control chip, finishing movement makes, the epoxy resin potting is used in rechargeable battery (1.2V*3/260Ah) back of connecting with its current-limiting resistance (resistance is that 0.4*2 is formed by 0.5 constantan wire coiling), and thickness is greater than 1.2mm, free from flaw, the exposed metal electrode is not formed intrinsic safety battery pack (rated voltage 3.6V; Maximum open circuit voltage 4.2V, maximum short circuit current is less than 5A), methane transducer is installed, oxygen sensor is installed, the intrinsic safety battery pack is installed, other each independent sensing module is installed, the fitting operation button is debugged qualified back casing is installed, and finishes the making work of this instrument, operation push-button, adjusting instrument gets final product work.
The element that uses in the instrument is that the IC1 model is LP3985/3.3V; The IC2 model is PIC16LF871; The IC3 model is DS1302; The IC4 model is LM358; The IC5 model is 74LS90; The U8 model is LM385/2.5V; The methane transducer model is LX-7, and the oxygen sensor model is
Claims (8)
1. a multi parameter intallingent type on-line monitoring is regulated warning device, it is characterized in that: this warning device comprises central processing unit, power supply, clock circuit, computing amplification converter, audible-visual annunciator, display, sensor and reference power supply, and power supply, clock module, computing amplification converter and sensor are connected with the input of central processing unit; Audible-visual annunciator is connected with the output of central processing unit with display; Reference power supply is connected with the input of computing amplification converter.
2. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described power supply has voltage-stabilized power supply and intrinsic safety electric source, described voltage-stabilized power supply is made of voltage-stabilized power supply switch module IC1, resistance R 3, capacitor C 1 and capacitor C 2, and 3 pin of voltage-stabilized power supply switch module IC1 are connected with 7 pin of central processing unit by resistance R 3; Described intrinsic safety electric source comprises battery E, resistance R 0, diode D4, diode D3, resistance R 4 and resistance R 5, battery E is with after resistance R 0 is connected, the outer wrapping epoxide-resin glue constitutes the intrinsic safety battery pack, be connected in parallel between battery E and the resistance R 0 after resistance R 4 and resistance R 5 series connection, between resistance R 4 and resistance R 5, be connected with 5 pin of central processing unit by lead.
3. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described central processing unit has the multi-functional embedded microcontroller IC2 of low-power consumption, be integrated with AD module, TMR module, EEPROM data storage and FLASN program storage functional module in microcontroller IC2 inside, form hardware circuit with the respective peripheral element, the fit applications software program is finished instrument control and calculation function.
4. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described clock circuit is by IC 3, crystal oscillator JZ2 and capacitor C 7, capacitor C 8,21 pin, 22 pin of 7 pin of IC 3,6 pin and 5 pin and central processing unit and 23 pin are corresponding is connected, between 2 pin of IC 3 and 3 pin, be connected with crystal oscillator JZ2, between 2 pin of IC 3 and 4 pin and be connected with capacitor C 7, capacitor C 8 respectively between 3 pin and 4 pin.
5. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described computing amplification converter comprises computing IC 4-1 and IC4-2, the negative input end of computing IC 4-1 is connected with reference power supply, the positive input terminal of computing IC 4-1 is connected with 24 pin of central processing unit, the output of computing IC 4-1 is by triode U7, the colelctor electrode of triode U7 is connected with R21 with the resistance R of series connection 20, the output of methane transducer and computing IC 4-2 are just, negative input end connects, and the output of computing IC 4-2 is connected with resistance; Described reference power supply comprises integrated circuit U8 and resistance R 17, resistance R 18 and resistance R 19, and the negative input end of IC 4-1 is connected between resistance R 18 and the resistance R 19, and 6 pin of central processing unit are connected between integrated circuit U8 and the resistance R 17; Producing 1.25V is connected with the methane transducer element circuit with central processing unit respectively with the 2.5V voltage reference.
6. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described audible-visual annunciator comprises triode U5, triode U6, diode D1, resistance R 16 and buzzer HA, 30 pin of central processing unit are connected with the base stage of triode U5 by diode D1, and triode U5 forms clad pipe with triode U6 and is connected with buzzer HA.
7. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described display comprises charactron LED, triode Q1, triode Q2, triode Q3 and triode Q4, the corresponding connection of 36 pin, 37 pin, 38 pin, 39 pin, 41 pin, 42 pin, 43 pin, 44 pin of charactron LED and central processing unit; Shift knob S1, zero point adjust and alarm point is provided with that button S2 and full scale adjustment and multi-parameter show 25 pin, 26 pin of switching push button S3 and central processing unit and 27 pin are corresponding is connected.
8. multi parameter intallingent type on-line monitoring according to claim 1 is regulated warning device, it is characterized in that: described sensor comprises methane transducer r and r0, oxygen sensor N, Rt, CO sensing module 4F-1000, temperature and humidity sensing module RHT03, infrared human body sensing module PIR, CO2 sensing module MS4100 and coal dust sensing module SPM4210, methane transducer r and r0 are connected between IC 4-1 and the IC 4-2; Oxygen sensor N, Rt is connected with 5 pin of central processing unit; CO sensing module 4F-1000 is connected with 8 pin of central processing unit; Temperature and humidity sensing module RHT03 is connected with 9 pin of central processing unit; Infrared human body sensing module PIR is connected with 10 pin of central processing unit, and CO2 sensing module MS4100 all is connected with 33 pin with 32 pin of central processing unit by communication module with coal dust sensing module SPM4210.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200094231U CN202065010U (en) | 2011-01-09 | 2011-01-09 | Multi-parameter intelligent on-line monitoring and adjusting alarm equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200094231U CN202065010U (en) | 2011-01-09 | 2011-01-09 | Multi-parameter intelligent on-line monitoring and adjusting alarm equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202065010U true CN202065010U (en) | 2011-12-07 |
Family
ID=45058878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200094231U Expired - Fee Related CN202065010U (en) | 2011-01-09 | 2011-01-09 | Multi-parameter intelligent on-line monitoring and adjusting alarm equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202065010U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577988A (en) * | 2012-03-08 | 2012-07-18 | 温州医学院 | Fault emergency protector for low-oxygen animal rearing cabin |
| CN103499618A (en) * | 2013-04-15 | 2014-01-08 | 贵州省教育厅 | Multiparameter gas determination device of mine-used act of rescue system |
| CN104464203A (en) * | 2014-12-02 | 2015-03-25 | 沈阳大学 | Gas monitoring alarm |
-
2011
- 2011-01-09 CN CN2011200094231U patent/CN202065010U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577988A (en) * | 2012-03-08 | 2012-07-18 | 温州医学院 | Fault emergency protector for low-oxygen animal rearing cabin |
| CN103499618A (en) * | 2013-04-15 | 2014-01-08 | 贵州省教育厅 | Multiparameter gas determination device of mine-used act of rescue system |
| CN104464203A (en) * | 2014-12-02 | 2015-03-25 | 沈阳大学 | Gas monitoring alarm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201606106U (en) | Portable type gas detection and personnel search-and-rescue combined instrument | |
| CN206740889U (en) | Electrical equipment supportability tester | |
| CN205749448U (en) | A kind of multifunctional gas detector | |
| CN202065010U (en) | Multi-parameter intelligent on-line monitoring and adjusting alarm equipment | |
| CN201716041U (en) | Indoor environment monitoring system | |
| CN202793696U (en) | GPRS intelligent detection terminal based on infrared gas sensor | |
| CN203178232U (en) | Vehicle and interior environmental monitoring alarming device | |
| CN102394322A (en) | Intelligent storage battery body with warning function | |
| CN103335800A (en) | Vibration fault detection method and device for wind turbine | |
| CN202256209U (en) | Mineral multi-parameter measuring device | |
| CN207851571U (en) | A kind of All-in-One sensor device | |
| CN201965472U (en) | Intelligent energy-saving power distribution control device | |
| CN203011426U (en) | Integrated hydropower station environment parameter monitor | |
| CN202309098U (en) | Communication monitor module of photovoltaic generating grid-connected inverter system | |
| CN202815644U (en) | High-power full-automatic intelligent alternative current (AC) voltage stabilized power supply | |
| CN104459263A (en) | Pointer ampere meter capable of automatically shifting gears | |
| CN202992979U (en) | Light-emitting diode (LED) methane alarming mining lamp | |
| CN203941223U (en) | Non-maintaining condensing type electroscope | |
| CN207051764U (en) | Key wakeup circuit and its manufactured meter reading terminal | |
| CN202189453U (en) | Device used for remotely sensing and monitoring physical quantity of self-organized network with low power consumption | |
| CN201392474Y (en) | Integrated processing terminal of electrical bicycle | |
| CN205404349U (en) | Room inner environment monitoring appearance | |
| CN215952666U (en) | Intelligent anti-dismantling and anti-theft type NB-IoT gas meter | |
| CN203191311U (en) | Methane concentration and methane leakage detecting and warning tester | |
| CN204314359U (en) | A kind of pointer reometer of the gear that automatically switches |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20130109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |