CN206114580U - Wide territory oxygen sensor's of hand -held type online tester - Google Patents
Wide territory oxygen sensor's of hand -held type online tester Download PDFInfo
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- CN206114580U CN206114580U CN201621106975.3U CN201621106975U CN206114580U CN 206114580 U CN206114580 U CN 206114580U CN 201621106975 U CN201621106975 U CN 201621106975U CN 206114580 U CN206114580 U CN 206114580U
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- oxygen sensor
- display screen
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- control unit
- hand
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The utility model discloses a wide territory oxygen sensor's of hand -held type online tester, including shell (1), power (2), the shell is connected with oxygen sensor socket (3), be equipped with display screen (4) in the shell, this display screen is connected with microcomputer control unit (5), the one end connection key switch (6) of microcomputer control unit, its other end connect gradually AD collector (7), difference control circuit (8). The one end connection microcomputer control unit of oxygen sensor socket, its other end meet with the wide territory oxygen sensor of required detection probe (9). The utility model discloses a this wide territory oxygen sensor's of display screen ability direct indication play pump electric current, measuring voltage and air -fuel ratio numerical value, it detects rate of accuracy height, connects and insert portably, operates the actual effect, shows directly perceived, convenient to carry, has guaranteed product quality and yield.
Description
Technical field
The present invention relates to a kind of for motor vehicle lambda sensor, is specifically related to a kind of tester of vehicle broad domain oxygen sensor
Device.
Background technology
At present, divide according to the characteristics of signals of vehicle oxygen sensor, it can be divided into：Narrow (transition formula), wide area (wideband
Belt) lambda sensor.Narrow lambda sensor can only detect that air-fuel ratio has been dense or dilute, and oil spout in other words has been many or few
But, be not aware that it is concrete how much dense, it is how much dilute, electric injection system by this signal make distributive value it is dense it is dilute between knock-oning
Move and control vehicle air-fuel ratio and be about 14.7, generally use just.With exhausting control it is more and more stricter, broad domain oxygen sensor
Occur as soon as, broad domain oxygen sensor is known that specific air-fuel ratio, that is, how much or dilute the fuel oil for spraying into cylinder dense
It is how many, the concrete ratio of air and fuel.Automotive oxygen sensor is sensing element crucial in BBG control system,
It is the vital part for controlling motor vehicle exhaust emission, reducing automobile environmental pollution, improve automobile engine fuel oil burning quality.
Broad domain oxygen sensor is that the oxygen voltage in each class A furnace A or discharge duct is measured using Ceramic sensible devices, by changing
Learn equilibrium principle and calculate corresponding oxygen concentration, reach air-fuel ratio in monitoring and control stove, it is ensured that product quality and tail gas
The measuring cell of emission compliance, is widely used in the control climate of the bodies of heater such as all kinds of coal combustions, oil firing, gas burning.For electricity
The feedback control system of son control fuel injection equipment (FIE), it is dense dilute with air-fuel ratio for detecting the oxygen concentration in being vented, starting
The monitoring of chemically correct fuel (14.7: 1) burning is carried out in machine, and feedback signal is conveyed to computer.It is determined after engine combustion
Exhaust in the whether superfluous information of oxygen, i.e. oxygen content, and oxygen content be converted into voltage signal be delivered to engine meter
Calculation machine, enables the engine to realize the closed-loop control with excess air factor as target.
The common detecting instrument of existing broad domain oxygen sensor is desk-top for test, and its volume is big, weight is high, not easily shifted,
Less it is convenient for carrying and uses, also random detection cannot be carried out to its semi-finished product on the production line of lambda sensor, is lambda sensor
Detection make troubles, it is impossible to ensure product quality and yield rate.
The content of the invention
It is an object of the invention to overcome the shortcomings of it is above-mentioned, and provide it is a kind of be convenient for carrying, detect simply, accuracy rate it is high
The In-circiut tester of hand-held broad domain oxygen sensor.
The purpose of the present invention is by following technical solution realizing：The In-circiut tester of hand-held broad domain oxygen sensor, bag
Shell, power supply are included, the shell is connected with lambda sensor socket, the inside the shell is equipped with display screen, the display screen and micro computer
Control unit connects；One end connection key switch of the microcomputer control unit, its other end are sequentially connected AD collectors, difference
Sub-control circuit.
One end connection difference control circuit of the lambda sensor socket, its other end are passed with the wide area oxygen of required detection
The probe of sensor connects.
After using the present invention, the display screen, microcomputer control unit, AD collectors, difference control circuit are module
Change (miniaturization) and design connected and cased portion, be easy to hand-held carrying；Microcomputer control unit (MCU) is sensed to wide area oxygen
The probe of device is heated, wide by detecting until its temperature is raised to the degrees centigrade of desired value 700 and keeps temperature constant state
The Ri internal resistance numerical value of domain oxygen sensor finished product is drawn；The pump electric current of difference control circuit control detection broad domain oxygen sensor, should
The into certain ratio of the oxygen concentration of the gas that the size of pump electric current and broad domain oxygen sensor are gathered, then transmitted by AD collectors
To microcomputer control unit, then pump electric current, the measurement for being directly displayed out the broad domain oxygen sensor by display screen Jing after data processing
Voltage and air-fuel ratio numerical value.Its Detection accuracy is high, patch simplicity, operation actual effect, intuitive display, easy to carry, it is ensured that produce
Quality and yield rate.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention is described in further detail with embodiment.
Fig. 1 is the contour structures schematic diagram of the present invention.
Fig. 2 is the circuit block diagram (being connected with the probe of broad domain oxygen sensor) of the present invention.
Specific embodiment
It can be seen from Fig. 1, Fig. 2, the In-circiut tester of hand-held broad domain oxygen sensor of the present invention, including shell 1, power supply 2,
The shell 1 is connected with lambda sensor socket 3, the shell 1 built with display screen 4, the display screen 4 and microcomputer control unit
5 (i.e. MCU) connect；One end connection key switch 6 (being mounted on shell 1), its other end of the microcomputer control unit 5 is successively
Connection AD collectors 7, difference control circuit 8.
One end connection difference control circuit 8, its other end of the lambda sensor socket 3 and the wide area oxygen of required detection
The probe 9 (its socket) of sensor 10 connects.As shown in Fig. 2 the operation principle of the present invention is：Power supply 2 work and first by micro- electricity
The probe 9 of brain control unit (MCU) 5 pairs of broad domain oxygen sensors 10 is heated, until its temperature is raised to 700 degrees Celsius of desired value
Left and right and keep temperature constant state, this target temperature can pass through the Ri internal resistance numerical value of detection broad domain oxygen sensor finished product and be drawn.
Then, broad domain oxygen sensor is started working, and according to this special principle of energy, is controlled to detect broad domain oxygen sensor by difference control circuit 8
Pump electric current, the into certain ratio of the oxygen concentration of the gas that size and the broad domain oxygen sensor of the pump electric current are gathered, then pass through
This analog signal is converted into data signal and sends microcomputer control unit (MCU) to by AD collectors 7, then Jing after data processing it is defeated
Go out signal to display screen 4, so as to be shown the number of the pump electric current, measurement voltage and air-fuel ratio of the broad domain oxygen sensor by display screen
Value, judges whether broad domain oxygen sensor finished product is qualified with this.This detection mode is easy, quick, practical.Can be with wide area oxygen biography
Direct random detection is carried out to broad domain oxygen sensor semi-finished product on the production line of sensor, for defective work can do over again again at once
Do.
Claims (2)
1. the In-circiut tester of hand-held broad domain oxygen sensor, including shell (1), power supply (2), it is characterised in that：The shell
(1) it is connected with lambda sensor socket (3), the shell (1) is built with display screen (4), and the display screen (4) is single with micro computer control
First (5) connection；One end connection key switch (6) of the microcomputer control unit (5), its other end are sequentially connected AD collectors
(7), difference control circuit (8).
2. the In-circiut tester of hand-held broad domain oxygen sensor according to claim 1, it is characterised in that：The oxygen sensing
One end of device socket (3) connects the probe of difference control circuit (8), its other end and the broad domain oxygen sensor of required detection
(9) connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621106975.3U CN206114580U (en) | 2016-09-30 | 2016-09-30 | Wide territory oxygen sensor's of hand -held type online tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621106975.3U CN206114580U (en) | 2016-09-30 | 2016-09-30 | Wide territory oxygen sensor's of hand -held type online tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206114580U true CN206114580U (en) | 2017-04-19 |
Family
ID=58529792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621106975.3U Active CN206114580U (en) | 2016-09-30 | 2016-09-30 | Wide territory oxygen sensor's of hand -held type online tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN206114580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353379A (en) * | 2016-09-30 | 2017-01-25 | 温州百岸汽车零部件有限公司 | On-line tester of handheld wide-domain oxygen sensor |
| CN108398527A (en) * | 2018-01-31 | 2018-08-14 | 广西玉柴机器股份有限公司 | A kind of natural gas engine lambda sensor detection method |
-
2016
- 2016-09-30 CN CN201621106975.3U patent/CN206114580U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353379A (en) * | 2016-09-30 | 2017-01-25 | 温州百岸汽车零部件有限公司 | On-line tester of handheld wide-domain oxygen sensor |
| CN108398527A (en) * | 2018-01-31 | 2018-08-14 | 广西玉柴机器股份有限公司 | A kind of natural gas engine lambda sensor detection method |
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