CN209928023U - Detection apparatus for whether active antenna inserts - Google Patents
Detection apparatus for whether active antenna inserts Download PDFInfo
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- CN209928023U CN209928023U CN201920241024.4U CN201920241024U CN209928023U CN 209928023 U CN209928023 U CN 209928023U CN 201920241024 U CN201920241024 U CN 201920241024U CN 209928023 U CN209928023 U CN 209928023U
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- active antenna
- sampling resistor
- beidou
- ina301a1
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Abstract
The utility model discloses a detection apparatus whether active antenna inserts, include: the Beidou receiver comprises an INA301A1 chip, a sampling resistor and a Beidou active antenna to be detected; the LIMIT and GND pins of the INA301a1 chip are respectively connected to two ends of a sampling resistor to read voltages at two sides of the sampling resistor; threshold voltage is arranged in the INA301A1 chip, and after the voltage at two sides of the sampling resistor is compared with the threshold voltage, the INA301A1 chip outputs a level signal from an ALERT pin; when the Beidou active antenna to be detected is not connected with the Beidou receiver, the voltage on two sides of the sampling resistor is 0 and is smaller than the threshold voltage, and the ALERT pin outputs a high-level signal; when the Beidou active antenna to be detected is connected to the Beidou receiver, the voltage on two sides of the sampling resistor is larger than the threshold voltage, and the ALERT pin outputs a low-level signal. The utility model provides a user can't accurate judge the problem that whether well inserts of outdoor antenna to easy operation, easily application and popularization.
Description
Technical Field
The utility model relates to a detection apparatus whether active antenna inserts.
Background
When the Beidou receiver works actually, the antenna must be installed outside a vehicle or in an outdoor open place or at a high place, so that the antenna can receive good signals. In the past, users all have experience that whether the antenna is well connected or not is judged by judging whether protocol information output by the receiver receives satellite signals or not, however, if the receiver has a fault, whether the antenna is well connected or not cannot be accurately judged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that a detection apparatus whether active antenna inserts is provided, solve the problem that the user can't accurately judge whether well the inserting of outdoor antenna to easy operation, easily application and popularization.
In order to solve the technical problem, the utility model provides a whether detection apparatus that active antenna inserted, include: the Beidou receiver comprises an INA301A1 chip, a sampling resistor and a Beidou active antenna to be detected;
the LIMIT and GND pins of the INA301a1 chip are respectively connected to two ends of a sampling resistor to read voltages at two sides of the sampling resistor; threshold voltage is arranged in the INA301A1 chip, and after the voltage at two sides of the sampling resistor is compared with the threshold voltage, the INA301A1 chip outputs a level signal from an ALERT pin;
when the Beidou active antenna to be detected is not connected with the Beidou receiver, the voltage on two sides of the sampling resistor is 0 and is smaller than the threshold voltage, and the ALERT pin outputs a high-level signal;
when the Beidou active antenna to be detected is connected to the Beidou receiver, the voltage on two sides of the sampling resistor is larger than the threshold voltage, and the ALERT pin outputs a low-level signal.
In a preferred embodiment: the Beidou receiver is a standard general Beidou receiver, supports a Beidou RNSS positioning function, and supports a frequency point of B1 or B3.
In a preferred embodiment: the open-drain alarm output of the INA301a1 chip is configured in a transparent mode.
In a preferred embodiment: the sampling resistor is a sampling resistor with known resistance and accuracy.
In a preferred embodiment: the Beidou active antenna to be detected is an active antenna with known power consumption.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
1. the utility model provides a detection device for whether the active antenna is connected or not, which can lead a user not to investigate the wiring condition of the outdoor and the vehicle external antennas, simplify the operation steps and save the maintenance time;
2. the utility model provides a pair of whether detection device that active antenna inserted, whether big dipper receiver can directly discern the antenna and insert, has promoted the efficiency that the system was arranged the trouble greatly.
Drawings
Fig. 1 is a detection circuit diagram of the present invention based on an INA301a1 chip;
fig. 2 is a signal flow chart of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
An all-in-one over-current detection device can be realized by connecting a current source of 80uA in an INA301A1 chip to a limiting pin, setting the alarm threshold voltage of the circuit by connecting a single external resistor to the ground terminal, and combining an internal current sensor amplifier and a comparator. The INA301a1 chip determines the alarm signal output state by comparing the amplified voltage across the sampling resistor with the alarm threshold voltage. The amplified voltage on the two sides of the sampling resistor is the input voltage VOUT of the internal comparator, and the calculation formula is as follows:
VOUT＝ILOAD*RSENSE*Gain
in the formula ILOADIs the load current, RSENSEFor sampling resistance values, Gain is the INA301A1 chip Gain.
Alarm threshold voltage VLimit＝VOUTThe external resistor is:
RLimal＝VLimit/80uA
the internal comparator of the INA301a1 chip is a hysteresis comparator. When the output VOUT exceeds the alarm threshold voltage VLimit, the alarm signal is pulled low. The internal comparator input voltage VOUT must drop below the hysteresis level VLimit before the alarm signal will return to the nominal high state.
The reset pin is connected to ground and the circuit is set to transparent mode, i.e. the output alarm signal varies with the input signal related to the alarm threshold. For example, the alarm signal output pin is pulled low when the comparator input signal is above the alarm threshold. When the input signal falls below the alarm threshold, the ALERT signal ALERT output returns to a default high output state.
The alarm output response of the internal comparator of INA301a 1. When V isOUTBelow alarm threshold voltage VlimitThe comparator output ALERT is in the default high state. When V isOUTExceeds VlimitThe ALERT signal ALERT is pulled low.
Therefore, given chip gain, Beidou active antenna power consumption and sampling resistance values, the working current of the antenna can be calculated according to the power supply voltage, and then the input voltage V of the internal comparator is calculatedOUTAnd a threshold resistance Rlimit。
This embodiment has realized big dipper active antenna and has accessed detection based on above principle, specifically:
referring to fig. 1-2, an apparatus for detecting whether an active antenna is connected includes: the Beidou receiver comprises an INA301A1 chip, a sampling resistor R1 and a Beidou active antenna to be detected;
the LIMIT and GND pins of the INA301a1 chip are respectively connected to both ends of a sampling resistor R1 to read voltages at both sides of the sampling resistor R1; threshold voltage is arranged in the INA301A1 chip, and after the voltage at two sides of the sampling resistor R1 is compared with the threshold voltage, the INA301A1 chip outputs a level signal from an ALERT pin;
when the Beidou active antenna to be detected is not connected with the Beidou receiver, the voltage on two sides of the sampling resistor R1 is 0 and is smaller than the threshold voltage, and the ALERT pin outputs a high-level signal;
when the Beidou active antenna to be detected is connected to the Beidou receiver, the voltage on two sides of the sampling resistor R1 is larger than the threshold voltage, and the ALERT pin outputs a low-level signal.
Therefore, through the circuit design, whether the Beidou receiver and the active antenna are normally connected or not can be visually seen very much, a user does not need to investigate the wiring condition of the outdoor antenna and the external antenna, the operation steps are simplified, and the maintenance time is saved. The Beidou receiver can directly identify whether the antenna is connected or not, and the system fault removal efficiency is greatly improved.
In this embodiment, the Beidou receiver is a standard general Beidou receiver, supports the Beidou RNSS positioning function, and supports the frequency point to be B1 or B3.
The open-drain alarm output of the INA301a1 chip is configured in a transparent mode.
The sampling resistor R1 is a sampling resistor with known resistance and accuracy.
The Beidou active antenna to be detected is an active antenna with known power consumption.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and variations or technical scope of the present invention disclosed may be easily conceived by those skilled in the art. Alternatives are intended to be within the scope of the invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.
Claims (5)
1. A device for detecting whether an active antenna is connected, comprising: the Beidou receiver comprises an INA301A1 chip, a sampling resistor and a Beidou active antenna to be detected;
the LIMIT and GND pins of the INA301a1 chip are respectively connected to two ends of a sampling resistor to read voltages at two sides of the sampling resistor; threshold voltage is arranged in the INA301A1 chip, and after the voltage at two sides of the sampling resistor is compared with the threshold voltage, the INA301A1 chip outputs a level signal from an ALERT pin;
when the Beidou active antenna to be detected is not connected with the Beidou receiver, the voltage on two sides of the sampling resistor is 0 and is smaller than the threshold voltage, and the ALERT pin outputs a high-level signal;
when the Beidou active antenna to be detected is connected to the Beidou receiver, the voltage on two sides of the sampling resistor is larger than the threshold voltage, and the ALERT pin outputs a low-level signal.
2. The apparatus for detecting whether an active antenna is connected according to claim 1, wherein: the Beidou receiver is a standard general Beidou receiver, supports a Beidou RNSS positioning function, and supports a frequency point of B1 or B3.
3. The apparatus for detecting whether an active antenna is connected according to claim 1, wherein: the open-drain alarm output of the INA301a1 chip is configured in a transparent mode.
4. The apparatus for detecting whether an active antenna is connected according to claim 1, wherein: the sampling resistor is a sampling resistor with known resistance and accuracy.
5. The apparatus for detecting whether an active antenna is connected according to claim 1, wherein: the Beidou active antenna to be detected is an active antenna with known power consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920241024.4U CN209928023U (en) | 2019-02-26 | 2019-02-26 | Detection apparatus for whether active antenna inserts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920241024.4U CN209928023U (en) | 2019-02-26 | 2019-02-26 | Detection apparatus for whether active antenna inserts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209928023U true CN209928023U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920241024.4U Active CN209928023U (en) | 2019-02-26 | 2019-02-26 | Detection apparatus for whether active antenna inserts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209928023U (en) |
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2019
- 2019-02-26 CN CN201920241024.4U patent/CN209928023U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211231 Address after: 030000 No. 351, TIYU Road, Taiyuan City, Shanxi Province Patentee after: NORTH AUTOMATIC CONTROL TECHNOLOGY INSTITUTE Address before: 361000 No. 86, Xiyuan Road, Xinyang street, Haicang District, Xiamen City, Fujian Province Patentee before: XIAMEN JIUHUA COMMUNICATION EQUIPMENT FACTORY |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220429 Address after: 361000 No. 86, Xiyuan Road, Xinyang street, Haicang District, Xiamen City, Fujian Province Patentee after: XIAMEN JIUHUA COMMUNICATION EQUIPMENT FACTORY Address before: 030000 No. 351, TIYU Road, Taiyuan City, Shanxi Province Patentee before: NORTH AUTOMATIC CONTROL TECHNOLOGY INSTITUTE |
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| TR01 | Transfer of patent right |