CN110913334A - Method for detecting effective connection distance of vehicle-mounted Bluetooth product and method for detecting product percent of pass - Google Patents
Method for detecting effective connection distance of vehicle-mounted Bluetooth product and method for detecting product percent of pass Download PDFInfo
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- CN110913334A CN110913334A CN201911208080.9A CN201911208080A CN110913334A CN 110913334 A CN110913334 A CN 110913334A CN 201911208080 A CN201911208080 A CN 201911208080A CN 110913334 A CN110913334 A CN 110913334A
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- vehicle
- bluetooth
- product
- mounted bluetooth
- connection distance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
Abstract
The invention discloses an effective connection distance detection method and a product percent of pass detection method for a vehicle-mounted Bluetooth product, belongs to the field of automatic detection, and aims to solve the problem that no effective connection distance test technology for the vehicle-mounted Bluetooth product exists at present. The method comprises the following steps: step one, placing a Bluetooth adapter in a pairing range of a vehicle-mounted Bluetooth product D0, and fixing the relative position between the Bluetooth adapter and the vehicle-mounted Bluetooth product D0 to be unchanged; step two, matching connection, reading connection strength N1; step three, covering the vehicle-mounted Bluetooth product by adopting a Bluetooth signal shielding cover, connecting in a matching way, and readingJoint strength N2; step four, judging whether the condition | N1-N2-N | is less than or equal to 5dBm or not; if the requirement meets the execution step five, if the requirement does not meet the detection requirement, the Bluetooth signal shielding cover is replaced, and then the step three is executed; step five, acquiring the actual effective connection distance d of the vehicle-mounted blue product:
Description
Technical Field
The invention belongs to the field of automatic detection, and relates to performance parameter detection of Bluetooth products.
Background
The vehicle-mounted Bluetooth product is characterized in that a Bluetooth module is solidified in the vehicle-mounted product, the vehicle-mounted Bluetooth product is matched with a terminal with a Bluetooth adapter, wireless control of the terminal on the vehicle-mounted Bluetooth product is achieved, and for example, a mobile phone (the terminal with the Bluetooth adapter) is used for controlling a vehicle-mounted Bluetooth power amplifier (the vehicle-mounted Bluetooth product) to play music.
Along with the promotion of people's standard of living, the increase of vehicle reserves, the market share of similar this kind of vehicle-mounted bluetooth product is bigger and bigger, general function to vehicle-mounted bluetooth product detects the tone quality that generally is manual test bluetooth telephone or bluetooth music, volume etc., but this kind of detection can not satisfy the requirement of customer to its performance index test, for example do not develop simple effectual method to vehicle-mounted bluetooth product now and detect vehicle-mounted bluetooth product's effective connection distance (farthest between vehicle-mounted bluetooth product and the bluetooth adapter, the distance that can stably connect), vehicle-mounted bluetooth product's effective connection distance's test result can directly judge whether this product is qualified, consequently, the test to vehicle-mounted bluetooth product's effective connection distance is the technical problem that the urgent need be solved.
Disclosure of Invention
The invention aims to solve the problem that no testing technology for the effective connection distance of a vehicle-mounted Bluetooth product exists at present, and provides a method for detecting the effective connection distance of the vehicle-mounted Bluetooth product and a method for detecting the product percent of pass.
The invention discloses a method for detecting the effective connection distance of a vehicle-mounted Bluetooth product and a method for detecting the qualified rate of the product, which comprises the following steps:
step one, placing a Bluetooth adapter in a pairing range of a vehicle-mounted Bluetooth product D0, and fixing the relative position between the Bluetooth adapter and the vehicle-mounted Bluetooth product D0 to be unchanged;
d0 is the rated effective connection distance of the vehicle-mounted Bluetooth product;
step two, the vehicle-mounted Bluetooth product is electrified, the Bluetooth adapter and the vehicle-mounted Bluetooth product are controlled by the upper computer to be connected in a matching mode, and after the connection is successful, the upper computer reads the connection strength N1;
step three, covering the vehicle-mounted Bluetooth product by using a Bluetooth signal shielding cover, controlling the Bluetooth adapter and the vehicle-mounted Bluetooth product to be in pairing connection through the upper computer, and reading the connection strength N2 by the upper computer after the connection is successful;
step four, judging whether the condition | N1-N2-N | is less than or equal to 5dBm or not; if the requirement meets the execution step five, if the requirement does not meet the detection requirement, the Bluetooth signal shielding cover is replaced, and then the step three is executed;
wherein N is the attenuation value of the Bluetooth signal shielding cover for enabling the Bluetooth connection strength;
step five, acquiring the actual effective connection distance d of the vehicle-mounted blue product:
d＝10(|N2|-Q)s/10；
wherein Q is the connection strength of the vehicle-mounted Bluetooth product when the connection distance is 1 m;
and s is an environmental attenuation factor and takes a value of 1.9.
Preferably, the value range of the Bluetooth connection strength attenuation value N is 20-30 dBm by the Bluetooth signal shielding cover.
The invention provides another technical scheme: the product qualification rate detection method of the vehicle-mounted Bluetooth product utilizes the obtained actual effective connection distance d to carry out the following steps:
judging whether the actual effective connection distance D meets the condition that D-D0 is more than or equal to-2 m or not; if the Bluetooth number is not met, the vehicle-mounted Bluetooth product is unqualified.
The invention has the beneficial effects that: the method can quickly acquire the effective connection distance of the vehicle-mounted Bluetooth product, and judges whether the vehicle-mounted Bluetooth product is qualified or not by comparing the calculation result with the factory rated effective connection distance.
Drawings
Fig. 1 is a flow chart of an effective connection distance detection method of a vehicle bluetooth product according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In a first specific embodiment, the following describes the present embodiment with reference to fig. 1, where the method for detecting an effective connection distance of a vehicle-mounted bluetooth product in the present embodiment includes the following steps:
step one, placing a Bluetooth adapter in a pairing range of a vehicle-mounted Bluetooth product D0, and fixing the relative position between the Bluetooth adapter and the vehicle-mounted Bluetooth product D0 to be unchanged;
d0 is the rated effective connection distance of the vehicle-mounted Bluetooth product;
step two, the vehicle-mounted Bluetooth product is electrified, the Bluetooth adapter and the vehicle-mounted Bluetooth product are controlled by the upper computer to be connected in a matching mode, and after the connection is successful, the upper computer reads the connection strength N1;
in this step, because the vehicle-mounted bluetooth product is preset in the range of D0, theoretically, the vehicle-mounted bluetooth product and the vehicle-mounted bluetooth product can be successfully paired, the connection strength N1 at this moment can be smoothly read, and if the vehicle-mounted bluetooth product is unsuccessful, the vehicle-mounted bluetooth product may be unqualified.
Step three, covering the vehicle-mounted Bluetooth product by using a Bluetooth signal shielding cover, controlling the Bluetooth adapter and the vehicle-mounted Bluetooth product to be in pairing connection through the upper computer, and reading the connection strength N2 by the upper computer after the connection is successful;
step four, judging whether the condition | N1-N2-N | is less than or equal to 5dBm or not; if the requirement meets the execution step five, if the requirement does not meet the detection requirement, the Bluetooth signal shielding cover is replaced, and then the step three is executed;
wherein N is the attenuation value of the Bluetooth signal shielding cover for enabling the Bluetooth connection strength;
the value range of the Bluetooth connection strength attenuation value N is 20-30 dBm by the Bluetooth signal shielding cover.
In the step, in order to verify the effectiveness of the Bluetooth signal shielding cover, the detection can be continuously and accurately carried out only when the connection strength attenuation value is required to be between 20 dBm and 30dBm, if the attenuation value condition of the Bluetooth signal shielding cover is not met, the detection result is inaccurate, and the actual effective connection distance d needs to be calculated after the Bluetooth signal shielding cover is replaced.
Step five, acquiring the actual effective connection distance d of the vehicle-mounted blue product:
d＝10(|N2|-Q)s/10；
wherein Q is the connection strength of the vehicle-mounted Bluetooth product when the connection distance is 1 m;
and s is an environmental attenuation factor and takes a value of 1.9.
The rated effective connection distance of the vehicle-mounted Bluetooth product is D0, the connection strength of the vehicle-mounted Bluetooth product in the connection distance of D0 is N0, and the two performance indexes are calibrated parameters when the vehicle-mounted Bluetooth product leaves a factory. After the vehicle-mounted product leaves the factory, the real effective distance of the vehicle-mounted Bluetooth product can be tested in a manual mode to verify whether the rated effective connection distance D0 is correct, but the mode has long operation time and wastes manpower and material resources.
The embodiment provides a simple method for quickly acquiring the important index of the actual effective connection distance d of the vehicle-mounted Bluetooth product.
In a second specific embodiment, the method for detecting the product yield of the vehicle-mounted bluetooth product in this embodiment is implemented by using the actual effective connection distance d obtained in the first embodiment:
judging whether the actual effective connection distance D meets the condition that D-D0 is more than or equal to-2 m or not; if the Bluetooth number is not met, the vehicle-mounted Bluetooth product is unqualified.
On the basis of acquiring the actual effective connection distance d of the vehicle-mounted Bluetooth product in the first embodiment, whether the vehicle-mounted Bluetooth product is qualified in Bluetooth connection performance can be directly judged. For example, if the rated effective connection distance is 18m, the actual effective connection distance obtained according to the method of the first embodiment is 15m, and D-D0 is not satisfied to be ≧ 2m, it indicates that the product is unqualified. If the actual effective connection distances of 17, 19, 21 and the like all meet D-D0 being more than or equal to-2 m, the product is qualified.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. The method for detecting the effective connection distance of the vehicle-mounted Bluetooth product is characterized by comprising the following steps:
step one, placing a Bluetooth adapter in a pairing range of a vehicle-mounted Bluetooth product D0, and fixing the relative position between the Bluetooth adapter and the vehicle-mounted Bluetooth product D0 to be unchanged;
d0 is the rated effective connection distance of the vehicle-mounted Bluetooth product;
step two, the vehicle-mounted Bluetooth product is electrified, the Bluetooth adapter and the vehicle-mounted Bluetooth product are controlled by the upper computer to be connected in a matching mode, and after the connection is successful, the upper computer reads the connection strength N1;
step three, covering the vehicle-mounted Bluetooth product by using a Bluetooth signal shielding cover, controlling the Bluetooth adapter and the vehicle-mounted Bluetooth product to be in pairing connection through the upper computer, and reading the connection strength N2 by the upper computer after the connection is successful;
step four, judging whether the condition | N1-N2-N | is less than or equal to 5dBm or not; if the requirement meets the execution step five, if the requirement does not meet the detection requirement, the Bluetooth signal shielding cover is replaced, and then the step three is executed;
wherein N is the attenuation value of the Bluetooth signal shielding cover for enabling the Bluetooth connection strength;
step five, acquiring the actual effective connection distance d of the vehicle-mounted blue product:
d＝10(|N2|-Q)s/10；
wherein Q is the connection strength of the vehicle-mounted Bluetooth product when the connection distance is 1 m;
and s is an environmental attenuation factor and takes a value of 1.9.
2. The method for detecting the effective connection distance of the vehicle-mounted Bluetooth product according to claim 1, wherein the Bluetooth signal shielding case enables a value range of a Bluetooth connection strength attenuation value N to be 20-30 dBm.
3. The product qualification rate detection method of the vehicle-mounted Bluetooth product is characterized by utilizing the actual effective connection distance d acquired by the method in claim 1 to perform the following steps:
judging whether the actual effective connection distance D meets the condition that D-D0 is more than or equal to-2 m or not; if the Bluetooth number is not met, the vehicle-mounted Bluetooth product is unqualified.
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Cited By (1)
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| CN114640405A (en) * | 2022-02-17 | 2022-06-17 | 深圳市百泰实业股份有限公司 | Bluetooth device testing method and system |
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