CN112379311A - Connection confirmation detection system and detection method for shore power connector - Google Patents
Connection confirmation detection system and detection method for shore power connector Download PDFInfo
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- CN112379311A CN112379311A CN202011050205.2A CN202011050205A CN112379311A CN 112379311 A CN112379311 A CN 112379311A CN 202011050205 A CN202011050205 A CN 202011050205A CN 112379311 A CN112379311 A CN 112379311A
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- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000012790 confirmation Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 48
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000012795 verification Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
Abstract
The invention discloses a shore power connector connection confirmation detection system and a detection method, wherein each contact pin in a connector plug is integrated with a displacement sensor for outputting displacement generated when the contact pin and a jack are plugged; the controller receives displacement signals fed back by the three displacement sensors, and if the displacement signals are consistent with the lengths of the contact pins, the relay switches corresponding to the parallel branches are switched on; the controller provides voltage for the three parallel branches, detects the total current, confirms whether the three branches are conducted or not, and confirms whether the connection of the socket and the plug is in place or not; otherwise the shore power connector socket and the shore power connector plug are deemed to be not reliably connected. The shore power equipment fault detection device can strictly detect whether the plug and the socket of the connector are completely inserted in place or not, can accurately position the faulty contact pin through the controller, and prompts an operator to carry out fault removal through the alarm information of the display screen, has the characteristics of high speed, high efficiency, safety and reliability, and ensures the safety of power supply of shore power equipment.
Description
Technical Field
The invention relates to the technical field of shore power equipment, in particular to a shore power connector connection confirmation detection system and a detection method.
Background
At present, most of ships such as passenger ships and cargo ships sailing in inland rivers and oceans in China still use diesel oil as power fuel, and when a diesel generator works, increasingly serious atmospheric pollution and noise pollution are brought to navigable waters and coasted towns.
In recent years, the national ministry of relativity highly attaches importance to the development of shore power, successively proposes 'oil is replaced by electricity', and vigorously develops the call of green shore power.
The shore power connector is a key component on the shore power equipment, but various standards of the shore power connector at present do not meet the requirements on the function of reliably carrying out automatic detection after the plug and the socket of the connector are plugged, and the connector is connected to confirm detection due to safety consideration, so that the shore power connector is an extremely important link in the power supply process of the shore power equipment and is also a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a shore power connector connection confirmation detection system and a detection method, which solve the problem that after a contact pin in a plug of a shore power equipment connector is plugged with a jack in a socket, the connector cannot automatically judge whether the contact pin and the socket are completely connected in place or not, so that an operator can be helped to automatically identify the plugging condition, and meanwhile, a fault prompt can be given.
In order to achieve the purpose, the invention provides a shore power connector connection confirmation detection system, which comprises a shore power connector socket, a shore power connector plug, a controller, a detection circuit and three displacement sensors, wherein the shore power connector socket is connected with the shore power connector plug;
the displacement sensor is arranged at the bottom of each contact pin of the shore power connector plug, and when the contact pins are inserted into the jacks of the shore power connector socket each time, a displacement signal of the insertion distance of the contact pins is returned to the controller;
the detection circuit comprises three parallel branches, and each parallel branch comprises a resistor and a relay switch which are connected in series; two ends of the three parallel branches are connected to the controller;
the controller receives displacement signals fed back by the three displacement sensors, and if the displacement signals are consistent with the lengths of the contact pins, the relay switches corresponding to the parallel branches are switched on; the controller provides voltage for the three parallel branches, detects total current, confirms whether the three branches are conducted or not, and confirms connection of the shore power connector socket and the shore power connector plug if the three branches are conducted; otherwise the shore power connector socket and the shore power connector plug are deemed to be not reliably connected.
Further, the shore power equipment is started by swiping a card; the three displacement sensors start to detect the feedback displacement signals after the card 10s is swiped.
Further, the resistance values of the three parallel branches are different, the controller calculates the equivalent resistance of the three parallel branches according to the total current, further judges whether the three parallel branches are normally connected, and determines whether the contact pins corresponding to the three parallel branches are inserted in place.
Further, the controller calculates equivalent resistances of the three parallel branches and compares the equivalent resistances with parallel values of the three resistors, if the equivalent resistances are different, the controller judges whether the branches are not closed, judges which of the branches are not closed according to the equivalent resistance, and outputs a prompt that the corresponding contact pin is not inserted in place.
Further, the controller allows 3 times of plugging, and if 3 times of plugging are not in place, the power supply is turned off.
The invention also provides a method for connection confirmation by using the shore power connector connection confirmation detection system, which comprises the following steps:
(1) inserting the shore power connector plug into the shore power connector socket, and returning the displacement amount by the displacement sensor; if the displacement amounts are consistent with the lengths of the contact pins, the step (2) is carried out, otherwise, the inconsistent contact pins are judged, and a prompt that the contact pins are not inserted in place is output;
(2) the controller controls the relay switches of the three parallel branches to be conducted, detects the total current and calculates the equivalent resistance of the three parallel branches, if the equivalent resistance is equal to the parallel value of the three resistances, the controller confirms that the insertion is in place, and the shore power equipment AC power supply main loop is allowed to be conducted; otherwise, judging whether the branch is not closed, judging which branch is not closed through the equivalent resistance value, and outputting a prompt that the corresponding contact pin is not inserted in place.
Further, judging which branch of the resistor is not closed through the equivalent resistance value comprises:
the resistance value of the first parallel branch is R1, the resistance value of the second parallel branch is R2, and the resistance value of the third parallel branch is R3; if the equivalent resistance R is 1/(1/R2+1/R3), the first parallel branch is judged to be not closed, and the corresponding first pin L is not inserted in place; if the equivalent resistance R is 1/(1/R1+1/R3), the second parallel branch is judged to be not closed, and the corresponding second contact pin N is not inserted in place; and if the equivalent resistance R is 1/(1/R1+1/R2), judging that the third parallel branch is not closed, and not inserting the corresponding third pin PE in place.
Further, the controller allows 3 times of plugging, and if 3 times of plugging are not in place, the power supply is turned off.
Further, in the power supply process, the total current is continuously monitored, the equivalent resistance is calculated, and if the total current is not equal to the parallel value of the three resistances, the insertion fault is prompted.
The technical scheme of the invention has the following beneficial technical effects: the shore power equipment fault detection device can strictly detect whether the plug and the socket of the connector are completely inserted in place or not, can accurately position the faulty contact pin through the controller, and prompts an operator to carry out fault removal through the alarm information of the display screen, has the characteristics of high speed, high efficiency, safety and reliability, and ensures the safety of power supply of shore power equipment.
Drawings
Fig. 1 is a plan view of a plug and a receptacle of a shore power unit connector for use in the present invention;
fig. 2 is a front sectional view of a plug and a socket of a shore power unit connector used in the present invention;
FIG. 3 is a schematic block circuit diagram of a connection confirmation detection system of the present invention;
fig. 4 is a flow chart of the connection confirmation detection system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Fig. 1 is a plan view of a plug and a socket of a shore power equipment connector, wherein 3 pins are arranged in the plug and are respectively defined as an L pin, an N pin and a PE pin, and 3 jacks are arranged in the socket corresponding to the 3 pins and are respectively defined as an L jack, an N jack and a PE jack.
As shown in fig. 2, the front section view of the plug 1 and the socket 2 of the shore power equipment connector is shown, wherein the lengths of the L pin, the N pin and the PE pin in the plug 1 are m1, m2 and m3 respectively, and the bottom integrated displacement sensors of the L pin, the N pin and the PE pin in the plug 1 are t1, t2 and t3 respectively; the jacks corresponding to the L pin, the N pin, and the PE pin inside the receptacle 2 are an L1 jack, an N1 jack, and a PE1 jack, respectively, and when the header 1 is plugged into the receptacle 2, the displacement sensors t1, t2, and t3 return the displacement amounts of the L pin, the N pin, and the PE pin to the controller 6, respectively. If each pin and each jack can be smoothly plugged to the bottom, t1, t2 and t3 respectively return values of m1, m2 and m3, if a certain pin is not plugged to the bottom due to a fault, the data returned by the corresponding sensor is 0, and the fault reasons can be pin looseness, pin bending, foreign matter in the pin, rusting of the pin or the jack, mismatching of the pin and the jack and the like.
Fig. 3 is a schematic block circuit diagram of a connection confirmation detection system, which comprises a shore power connector socket 2, a shore power connector plug 1, a controller 6, a detection circuit 5, a display screen 7 and three displacement sensors t 1-t 3; the detection circuit 5 is a parallel circuit, and the voltage at both ends is set to be U, the equivalent resistance is r, and the loop current is I. Because the number of the contact pins is 3, the detection circuit 5 is a parallel loop consisting of 3 branches connected in series, the branch 1 corresponds to the contact pin L or the jack L1, the resistance value of the resistor connected in series inside is R1, and the normally open relay connected in series is K1; the branch 2 corresponds to a contact pin N or a jack N1, the resistance value of a resistor connected in series inside is R2, and the resistance value of a normally open relay connected in series is K2; branch 3 corresponds to pin PE or socket PE1, the resistance of the internal series resistor is R3, and the series normally open relay is K3.
The controller 6 judges the displacement returned by the displacement sensors t1, t2 and t3, if the return displacement of t1 is m1, the relay K1 of the parallel branch 1 is changed from a normally open state to a closed state, namely the resistor R1 is merged into the detection circuit 5, otherwise, the parallel branch 1 is in an open state; similarly, if the return displacement of t2 is m2, the relay K2 of the parallel branch 2 changes from the normally open state to the closed state, that is, the resistor R2 is incorporated into the detection circuit 5, otherwise, the parallel branch 2 is in the open state; if the return displacement of t3 is m3, the relay K3 of the parallel branch 3 changes from the normally open state to the closed state, i.e., the resistor R3 is incorporated into the detection circuit 5, otherwise, the parallel branch 3 is in the open state.
When an operator inserts the plug 1 and the socket 2 for the first time, after the insertion is stopped, if the displacement returned by any displacement sensor is incorrect, the situation that the contact pin has a fault in the insertion process is indicated, at this time, the controller 6 can send out alarm information and prompt the operator to 'allow the insertion for 2 times (at most 3 times) again' on the display screen 7, and the power supply locking is performed for the second time when the insertion frequency is greater than the maximum frequency.
If the plug 1 and the socket 2 are plugged smoothly and the controller 6 detects that the return displacement amounts of the displacement sensors t1, t2 and t3 are all completely correct, the relays K1, K2 and K3 are closed, the three branches in the detection circuit 5 are completely connected in parallel, and at this time, the controller 6 still needs to further judge whether the equivalent resistance r and the loop current I of the detection circuit 5 are both correct or not.
Since each pin and jack may have a fault, the equivalent resistor r of the detection circuit 5 should have 7 different resistance values according to various conditions of insertion between the plug and the socket, as follows:
(1) if the pins L, N, and PE are all inserted into place smoothly, R1 is 1/(1/R1+1/R2+1/R3), and the loop current I1 is U/R1.
(2) And if the pin L and the pin N are smoothly inserted in place, and the pin PE is not inserted in place due to a fault, R2 is 1/(1/R1+1/R2), and the loop current I2 is U/R2. At this time, the display screen prompts that the pin PE is in fault and is not inserted in place.
(3) And the pins L and PE are smoothly inserted in place, and the pin N is not inserted in place due to a fault, so that R3 is 1/(1/R1+1/R3), and the loop current I3 is U/R3. At this time, the display screen prompts that the pin N is in fault and is not inserted in place.
(4) And the pin N and the pin PE are smoothly inserted in place, and the pin L is not inserted in place due to faults, so that R4 is 1/(1/R2+1/R3), and the loop current I4 is U/R4. At this time, the display screen prompts that the pin L is in fault and is not inserted in place.
(5) If the pin L is successfully inserted in place, and the pin N and the pin PE are not inserted in place due to a fault, R5 is equal to R1, and the loop current I5 is equal to U/R5. At this time, the display screen prompts that the pin N and the pin PE are in fault and are not inserted in place.
(6) If pin N is successfully plugged in place, and pin L and pin PE are not plugged in place due to a fault, R6 is R2, and loop current I6 is U/R6. At this time, the display screen prompts that the contact pin L and the contact pin PE are in fault and are not inserted in place.
(7) And the pin PE is smoothly inserted in place, and the pin L and the pin N are not inserted in place due to faults, so that R7 is equal to R3, and the loop current I7 is equal to U/R7. At this time, the display screen prompts that the contact pin L and the contact pin N are in failure and are not inserted in place.
Because the voltage U at the end of the detection circuit 5 is deviated, and the resistors R1, R2, and R3 of the three parallel branches have larger resistance errors, even if the pin L, the pin N, the pin PE and the L1 jack, the N1 jack, and the PE1 jack are inserted smoothly, the controller 6 still needs to judge the equivalent resistor R and the loop current I of the detection circuit 5, if the equivalent resistor R is correct, that is, R is R1; at the same time, the loop current I is correct, i.e. I ═ I1, the controller 6 allows the main loop of the shore power plant to conduct for live operation.
When the controller 6 judges that any value of the equivalent resistance r or the loop current I of the detection circuit 5 is incorrect, the main loop of the shore power equipment is not allowed to be conducted, so that the display screen has the following two prompting messages:
(1) the display screen 7 prompts "the connection confirms that the equivalent resistance of the detection circuit is correct and the loop current is wrong", and at this time, the terminal voltage U of the detection circuit 5 is incorrect, and an operator needs to correct the terminal voltage.
(2) The display 7 prompts "connection confirmation detection circuit equivalent resistance error, loop current error", and at this time, it indicates that the resistance value in series in one or more branches in the parallel branches of the detection circuit 5 is incorrect, and an operator is required to correct the resistance.
The connection confirmation detection system of the shore power equipment connector not only detects after the plug and the socket are plugged each time, but also always detects in the operation process of the shore power equipment, and prevents the occurrence of faults such as accidental falling of the plug and the socket in the operation process of the shore power equipment.
A method of performing a connection confirmation, comprising the steps of:
(1) inserting the shore power connector plug into the shore power connector socket, and returning the displacement amount by the displacement sensor; if the displacement amounts are consistent with the lengths of the contact pins, the step (2) is carried out, otherwise, the inconsistent contact pins are judged, and a prompt that the contact pins are not inserted in place is output;
(2) the controller controls the relay switches of the three parallel branches to be conducted, detects the total current and calculates the equivalent resistance of the three parallel branches, if the equivalent resistance is equal to the parallel value of the three resistances, the controller confirms that the insertion is in place, and the shore power equipment AC power supply main loop is allowed to be conducted; otherwise, judging whether the branch is not closed, judging which branch is not closed through the equivalent resistance value, and outputting a prompt that the corresponding contact pin is not inserted in place.
Further, the resistance value of the first parallel branch is R1, the resistance value of the second parallel branch is R2, and the resistance value of the third parallel branch is R3; if the equivalent resistance R is 1/(1/R2+1/R3), the first parallel branch is judged to be not closed, and the corresponding first pin L is not inserted in place; if the equivalent resistance R is 1/(1/R1+1/R3), the second parallel branch is judged to be not closed, and the corresponding second contact pin N is not inserted in place; and if the equivalent resistance R is 1/(1/R1+1/R2), judging that the third parallel branch is not closed, and not inserting the corresponding third pin PE in place.
In summary, the invention discloses a shore power connector connection confirmation detection system and a detection method, wherein each pin inside a connector plug is integrated with a displacement sensor for outputting displacement generated when the pin and a jack are plugged; the controller receives displacement signals fed back by the three displacement sensors, and if the displacement signals are consistent with the lengths of the contact pins, the relay switches corresponding to the parallel branches are switched on; the controller provides voltage for the three parallel branches, detects the total current, confirms whether the three branches are conducted or not, and confirms whether the connection of the socket and the plug is in place or not; otherwise the shore power connector socket and the shore power connector plug are deemed to be not reliably connected. The shore power equipment fault detection device can strictly detect whether the plug and the socket of the connector are completely inserted in place or not, can accurately position the faulty contact pin through the controller, and prompts an operator to carry out fault removal through the alarm information of the display screen, has the characteristics of high speed, high efficiency, safety and reliability, and ensures the safety of power supply of shore power equipment.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A shore power connector connection confirmation detection system is characterized by comprising a shore power connector socket, a shore power connector plug, a controller, a detection circuit and three displacement sensors;
the displacement sensor is arranged at the bottom of each contact pin of the shore power connector plug, and when the contact pins are inserted into the jacks of the shore power connector socket each time, a displacement signal of the insertion distance of the contact pins is returned to the controller;
the detection circuit comprises three parallel branches, and each parallel branch comprises a resistor and a relay switch which are connected in series; two ends of the three parallel branches are connected to the controller;
the controller receives displacement signals fed back by the three displacement sensors, and if the displacement signals are consistent with the lengths of the contact pins, the relay switches corresponding to the parallel branches are switched on; the controller provides voltage for the three parallel branches, detects total current, confirms whether the three branches are conducted or not, and confirms connection of the shore power connector socket and the shore power connector plug if the three branches are conducted; otherwise the shore power connector socket and the shore power connector plug are deemed to be not reliably connected.
2. The shore power connector connection confirmation detection system of claim 1, wherein the shore power equipment is activated by swiping a card; the three displacement sensors start to detect the feedback displacement signals after the card 10s is swiped.
3. The shore power connector connection confirmation detection system as claimed in claim 1 or 2, wherein the resistance values of the three parallel branches are different, and the controller calculates the equivalent resistances of the three parallel branches according to the total current, so as to determine whether the three parallel branches are normally connected, and determine whether the pins corresponding to the three parallel branches are inserted in place.
4. The shore power connector connection confirmation detection system as claimed in claim 3, wherein the controller calculates equivalent resistances of three parallel branches and compares the equivalent resistances with parallel values of three resistors, if the equivalent resistances are different, the controller determines that an unclosed branch exists, determines which of the branches where the resistors are located are unclosed according to the equivalent resistance values, and outputs a prompt that the corresponding contact pin is not inserted in place.
5. A shore power connector connection confirmation detection system according to claim 1 or 2, wherein said controller allows plugging 3 times and shuts down the power supply if none of the 3 plugs are in place.
6. Method for connection verification using a shore power connector connection verification detection system according to one of claims 1 to 5, characterized in that it comprises the following steps:
(1) inserting the shore power connector plug into the shore power connector socket, and returning the displacement amount by the displacement sensor; if the displacement amounts are consistent with the lengths of the contact pins, the step (2) is carried out, otherwise, the inconsistent contact pins are judged, and a prompt that the contact pins are not inserted in place is output;
(2) the controller controls the relay switches of the three parallel branches to be conducted, detects the total current and calculates the equivalent resistance of the three parallel branches, if the equivalent resistance is equal to the parallel value of the three resistances, the controller confirms that the insertion is in place, and the shore power equipment AC power supply main loop is allowed to be conducted; otherwise, judging whether the branch is not closed, judging which branch is not closed through the equivalent resistance value, and outputting a prompt that the corresponding contact pin is not inserted in place.
7. The method of claim 6, wherein determining which branch of the resistors is not closed according to the equivalent resistance value comprises:
the resistance value of the first parallel branch is R1, the resistance value of the second parallel branch is R2, and the resistance value of the third parallel branch is R3; if the equivalent resistance R is 1/(1/R2+1/R3), the first parallel branch is judged to be not closed, and the corresponding first pin L is not inserted in place; if the equivalent resistance R is 1/(1/R1+1/R3), the second parallel branch is judged to be not closed, and the corresponding second contact pin N is not inserted in place; and if the equivalent resistance R is 1/(1/R1+1/R2), judging that the third parallel branch is not closed, and not inserting the corresponding third pin PE in place.
8. The method of claim 6 or 7, wherein the controller allows 3 insertions and shuts down power if none of the 3 insertions is in place.
9. Method for connection verification according to claim 6 or 7, characterized in that during the power supply the total current is continuously monitored, the equivalent resistance is calculated and if not equal to the parallel value of the three resistances, an insertion failure is indicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011050205.2A CN112379311A (en) | 2020-09-29 | 2020-09-29 | Connection confirmation detection system and detection method for shore power connector |
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| CN202011050205.2A CN112379311A (en) | 2020-09-29 | 2020-09-29 | Connection confirmation detection system and detection method for shore power connector |
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| CN112379311A true CN112379311A (en) | 2021-02-19 |
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| CN202011050205.2A Pending CN112379311A (en) | 2020-09-29 | 2020-09-29 | Connection confirmation detection system and detection method for shore power connector |
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