CN216290161U - GNSS satellite navigation receiver power supply protection and fault detection device - Google Patents
GNSS satellite navigation receiver power supply protection and fault detection device Download PDFInfo
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- CN216290161U CN216290161U CN202122806011.7U CN202122806011U CN216290161U CN 216290161 U CN216290161 U CN 216290161U CN 202122806011 U CN202122806011 U CN 202122806011U CN 216290161 U CN216290161 U CN 216290161U
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Abstract
The utility model discloses a power supply protection and fault detection device of a GNSS satellite navigation receiver, which comprises an ADC (analog-to-digital converter) acquisition module and a CPU (central processing unit) control module, as well as an over-under-voltage protection module, a first current detection module, a DC/DC (direct current/direct current) power supply module, a power supply filtering module, a feed protection module and a second current detection module which are sequentially connected, wherein an external power supply is connected with the first current detection module through the over-under-voltage protection module, an external GNSS active antenna is connected with the feed protection module through the second current detection module, the ADC acquisition module is respectively connected with the first current detection module, the second current detection module and the power supply filtering module, and the CPU control module is respectively connected with the ADC acquisition module, the DC/DC power supply module and the feed protection module. The utility model effectively improves the power supply reliability of the GNSS satellite navigation receiver in a complex environment, can provide instant information for a target user, and provides data support for the user to judge and control the working state of the GNSS satellite navigation receiver.
Description
Technical Field
The utility model relates to the technical field of satellite navigation receivers, in particular to a power supply protection and fault detection device for a GNSS satellite navigation receiver.
Background
At present, a GNSS (Global Navigation Satellite System) Satellite Navigation receiver has been widely applied to various technical fields, whereas a conventional GNSS Satellite Navigation receiver generally employs a DC/DC (a device that converts electric energy of one voltage value into electric energy of another voltage value in a DC circuit) power chip with over-under-voltage limitation to directly output a power supply required by the GNSS Satellite Navigation receiver, and does not acquire and monitor power supply information of the GNSS Satellite Navigation receiver, and meanwhile, a feed unit of the GNSS Satellite Navigation receiver directly takes electricity from the power supply, performs filtering processing, and then feeds the electricity to an active antenna through an inductor. Due to the problems of inconsistent working voltage, inconsistent power clutter and the like existing in the working environment of the GNSS satellite navigation receiver, the receiver is easy to fail when the power supply characteristic of the main equipment is changed; meanwhile, the active antenna is located outside the main device, so that the antenna power supply short circuit phenomenon easily occurs when the cable is subjected to external environmental changes such as external force bending.
In view of this, the utility model researches a GNSS satellite navigation receiver power supply protection and fault detection device, which can set a power supply voltage range of the satellite navigation receiver according to a user requirement, and is used for not starting power supply for working voltages exceeding and falling below the requirement; and the device is used for protecting the satellite navigation receiver from being damaged by surge voltage and undervoltage power supplies, outputting fault indication and actively cutting off the power supply when the power supply current is greater than or less than a rated value. When the host machine of the satellite navigation receiver feeds power to the GNSS active antenna, the power supply can be automatically cut off when a short circuit occurs, and a fault alarm indication is output and the power supply is cut off when the current value is smaller than a rated value; and outputting a fault alarm indication and cutting off the power supply when the current value is larger than the rated current.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power supply protection and fault detection device for a GNSS satellite navigation receiver, which can set the power supply voltage range of the satellite navigation receiver according to the requirement of a user and is used for not starting power supply for working voltages exceeding and falling below the requirement; and the device is used for protecting the satellite navigation receiver from being damaged by surge voltage and undervoltage power supplies, outputting fault indication and actively cutting off the power supply when the power supply current is greater than or less than a rated value. When the host machine of the satellite navigation receiver feeds power to the GNSS active antenna, the power supply can be automatically cut off when a short circuit occurs, and a fault alarm indication is output and the power supply is cut off when the current value is smaller than a rated value; and outputting a fault alarm indication and cutting off the power supply when the current value is larger than the rated current.
In order to solve the above technical problems, the present invention provides a GNSS satellite navigation receiver power supply protection and fault detection apparatus, comprising an ADC (analog to digital conversion) acquisition module and a CPU (central processing unit) control module, as well as an over/under voltage protection module, a first current detection module, a DC/DC power supply module, a power filter module, a feed protection module and a second current detection module connected in sequence, wherein an external power supply is connected to the first current detection module through the over/under voltage protection module, an external GNSS active antenna is connected to the feed protection module through the second current detection module, the ADC acquisition module is respectively connected to the first current detection module, the second current detection module and the power filter module for acquiring current signals of the first current detection module, the second current detection module and the power filter module and converting them into corresponding voltage signals, the CPU control module is respectively connected with the ADC acquisition module, the DC/DC power supply module and the feed protection module, and controls the DC/DC power supply module and the feed protection module according to the voltage signals acquired by the ADC acquisition module.
Preferably, the overvoltage and undervoltage protection module is respectively connected with the external power supply and the first current detection module through MOS transistors.
Preferably, the overvoltage and undervoltage protection module comprises a surge suppression module, and an overvoltage protection module and an undervoltage protection module which are respectively connected with the surge suppression module and are arranged in parallel.
Preferably, the model of the ADC acquisition module is AD 7888.
Preferably, a single-channel current-limiting power distribution switch is arranged in the feed protection module.
Preferably, the model of the single-channel current-limiting power distribution switch is TPS 2041B.
Preferably, the first current detection module and the second current detection module are both LTC 6101.
Compared with the prior art, the utility model has the following beneficial technical effects:
(1) according to the GNSS satellite navigation receiver, the power supply circuit is protected by arranging the surge suppression module, the overvoltage protection module and the undervoltage protection module in the power supply circuit, so that the power supply reliability of the GNSS satellite navigation receiver in a complex environment is improved;
(2) according to the utility model, the first current detection module and the second current detection module are arranged to detect the external power supply input by the GNSS satellite navigation receiver and the external GNSS active antenna power supply, so that the real-time working state of the power supply of the GNSS satellite navigation receiver can be effectively detected, instant information is provided for a target user, and data support is provided for the user to judge and control the working state of the GNSS satellite navigation receiver.
Drawings
Fig. 1 is a schematic structural diagram of a GNSS satellite navigation receiver power supply protection and fault detection apparatus according to the present invention.
In the figure: 1. the power supply comprises an over-voltage and under-voltage protection module, 11, a surge suppression module, 12, an over-voltage protection module, 13, an under-voltage protection module, 2, a first current detection module, 3, a DC/DC power supply module, 4, a power supply filtering module, 5, a feed protection module, 6, a second current detection module, 7, an ADC acquisition module and 8, a CPU control module.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, a GNSS satellite navigation receiver power supply protection and fault detection device comprises an ADC acquisition module 7 and a CPU control module 8, and a over/under voltage protection module 1, a first current detection module 2, a DC/DC power module 3, a power filter module 4, a feed protection module 5 and a second current detection module 6 which are connected in sequence, wherein an external power supply is connected with the first current detection module 2 through the over/under voltage protection module 1, an external GNSS active antenna is connected with the feed protection module 5 through the second current detection module 6, the ADC acquisition module 7 is respectively connected with the first current detection module 2, the second current detection module 6 and the power filter module 4 and is used for acquiring current signals of the first current detection module 2, the second current detection module 6 and the power filter module 4 and converting the current signals into corresponding voltage signals, and the CPU control module 8 is respectively connected with the ADC acquisition module 7, The DC/DC power module 3 is connected with the feed protection module 5, and the CPU control module 8 respectively controls the DC/DC power module 3 and the feed protection module 5 according to the voltage signal acquired by the ADC acquisition module 7.
In this embodiment, the first current detection module 2 and the second current detection module 6 are both LTC 6101. Wherein, cross undervoltage protection module 1 and pass through MOS pipe (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) and be connected with external power supply and first current detection module 2 respectively, and then can allow the heavy current to pass through, cross undervoltage protection module 1 and include surge suppression module 11 and be connected respectively with surge suppression module 11 and parallelly connected overvoltage protection module 12 and the undervoltage protection module 13 that sets up.
In this embodiment, by setting the overvoltage/undervoltage protection module 1 and using the MOS transistor to connect the external power supply and the first current detection module 2, a wider operating Voltage range can be achieved without an input capacitor or a TVS (Transient Voltage Suppressor) transistor required in a conventional circuit, the operating Voltage range can be configured between 2.5V and 34V, the overvoltage protection can reach 60V, the reverse power supply Voltage protection can reach-40V, i.e., a 50Hz and 60Hz ac power supply can be blocked, and a fast fault recovery capability (speed can reach 1ms) is provided. After the external power supply is powered on, the under-voltage input range is configured, the CPU control module 8 can obtain the input voltage value of the external power supply through the ADC acquisition module 7, and when a fault occurs, the CPU control module 8 can actively cut off the external power supply, so that the power supply reliability of the GNSS satellite navigation receiver in a complex environment is improved.
In this embodiment, the model of the ADC acquisition module 7 is AD 7888. The first current detection module 2 and the second current detection module 6 collect current signals of an external power supply and an external GNSS active antenna power supply respectively and convert the current signals into corresponding output voltage signals Vout, as shown by the formula Vout-Vsense × Rout/Rin (where Vsense represents a sensor voltage, Rout represents an input terminal resistance value, and Rin represents an output terminal resistance value), when Vout is constant, the range of Vsense is inversely proportional to Rout/Rin, and Vsense ═ I × Rsense, when Rsense (representing a detection resistor connected in series with the power supply) is constant, the range of current is proportional to the range of Vsense, since the range of voltage signal collection by the ADC collection module 7 of type AD7888 is 0-2.5V, the magnitude of Vout needs to be controlled in actual use of the circuit, when the Rout in the current detection amplification circuit is 100R 10K, Rin, since Vout is Vsense × Rout/Rin, the range of Vsense is 0 to 25mV, and Rsense × Rsense, i.e., Rsense × 0.02R, the range of detected current I is 0 to 1.25A. Therefore, the detection range of the circuit current can be flexibly configured by configuring the circuit, in the practical application, various voltage information in the GNSS satellite navigation receiver can be acquired according to the current value requirement of a user, the working state of the corresponding GNSS satellite navigation receiver is further monitored, instant information is provided for the user, and data support is provided for the user to judge and control the working state of the GNSS satellite navigation receiver.
In this embodiment, voltage acquisition and alarm processing are designed, the voltage meets the range requirement of the ADC acquisition module 7 (i.e., AD7888) by using a resistance voltage division manner, and a real voltage signal can be acquired by scaling, which is convenient for system control and management.
The feeding protection module 5 is provided with a single-channel current-limiting power distribution switch, and the model of the single-channel current-limiting power distribution switch is TPS 2041B.
In the embodiment, when external stress and other factors cause short circuit of an external GNSS active antenna, the TPS2041B single-channel current-limiting power distribution switch is directly turned off to further protect power supply and distribution equipment from being damaged; and when the second current detection module 6 detects that the feeding current is greater than or lower than the rated current value, at this time, the CPU control module 8 turns off the feeding power output in the feeding protection module 5 to protect the circuit.
The GNSS satellite navigation receiver power supply protection and fault detection device provided by the utility model is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a GNSS satellite navigation receiver power supply protection and fault detection device, a serial communication port, including ADC collection module (7) and CPU control module (8), and the mistake undervoltage protection module (1) that connects gradually, first current detection module (2), DC/DC power module (3), power filtering module (4), feed protection module (5) and second current detection module (6), external power passes through undervoltage protection module (1) and is connected with first current detection module (2), outside GNSS active antenna passes through second current detection module (6) and is connected with feed protection module (5), ADC collection module (7) are connected with first current detection module (2), second current detection module (6) and power filtering module (4) respectively and are used for gathering the current signal of first current detection module (2), second current detection module (6) and power filtering module (4) and convert it to corresponding voltage signal The CPU control module (8) is respectively connected with the ADC acquisition module (7), the DC/DC power supply module (3) and the feed protection module (5), and the CPU control module (8) respectively controls the DC/DC power supply module (3) and the feed protection module (5) according to the voltage signals acquired by the ADC acquisition module (7).
2. The GNSS satellite navigation receiver power supply protection and fault detection device of claim 1, wherein the over-voltage and under-voltage protection module (1) is connected to an external power supply and the first current detection module (2) through MOS tubes, respectively.
3. The GNSS satellite navigation receiver power supply protection and fault detection apparatus of claim 2, wherein the over-voltage and under-voltage protection module (1) comprises a surge suppression module (11) and an over-voltage protection module (12) and an under-voltage protection module (13) respectively connected to the surge suppression module (11) and arranged in parallel.
4. The GNSS satellite navigation receiver power supply protection and fault detection apparatus of claim 1, wherein the ADC acquisition module (7) is model number AD 7888.
5. The GNSS satellite navigation receiver power supply protection and fault detection device of claim 1, wherein a single-channel current-limiting power distribution switch is provided in the feed protection module (5).
6. The GNSS satellite navigation receiver power protection and fault detection apparatus of claim 5, wherein the single channel current limiting power distribution switch is model TPS 2041B.
7. The GNSS satellite navigation receiver power supply protection and fault detection apparatus of claim 1, wherein the first current detection module (2) and the second current detection module (6) are both LTC6101 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122806011.7U CN216290161U (en) | 2021-11-16 | 2021-11-16 | GNSS satellite navigation receiver power supply protection and fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122806011.7U CN216290161U (en) | 2021-11-16 | 2021-11-16 | GNSS satellite navigation receiver power supply protection and fault detection device |
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| Publication Number | Publication Date |
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| CN216290161U true CN216290161U (en) | 2022-04-12 |
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| CN202122806011.7U Active CN216290161U (en) | 2021-11-16 | 2021-11-16 | GNSS satellite navigation receiver power supply protection and fault detection device |
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- 2021-11-16 CN CN202122806011.7U patent/CN216290161U/en active Active
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