CN108847837B - Signal Converter - Google Patents
Signal Converter Download PDFInfo
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- CN108847837B CN108847837B CN201810537333.6A CN201810537333A CN108847837B CN 108847837 B CN108847837 B CN 108847837B CN 201810537333 A CN201810537333 A CN 201810537333A CN 108847837 B CN108847837 B CN 108847837B
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- 238000012360 testing method Methods 0.000 claims abstract description 53
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims description 58
- 239000007924 injection Substances 0.000 claims description 58
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 9
- 241000234295 Musa Species 0.000 description 7
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/002—Switching arrangements with several input- or output terminals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K2017/515—Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention provides a signal converter comprising: a first socket set configured to receive a device under test signal; a relay group including a plurality of relays; a function selection switch configured to enable a corresponding relay in the relay group by selecting a preset switch position; and a second socket set configured to transmit respective device under test signals to a standard instrument via the enabled respective relays to measure respective parameters under test of the device under test. The signal converter provided by the invention can not only realize the conversion from the tested equipment signal to the standard instrument signal, but also conveniently perform measurement switching among various parameters to be tested of the tested equipment, and can not cause instrument damage due to wiring errors.
Description
Technical Field
The invention relates to the technical field of metering calibration, in particular to a signal converter.
Background
In the development of control systems, it is critical to test the design and execution of all system functions. The safety critical control system requires an additional test requirement, namely, ensuring that the data bus can reasonably handle the fault condition, and the test performed on the data bus to handle the fault condition is generally called a data bus fault injection test.
In the case of a data bus fault injection test system (hereinafter referred to simply as an injection system), it is necessary to measure the resistance, pulse signal amplitude, rise time and duty ratio between differential signal lines of a data bus, and it is necessary to connect standard instruments (e.g., a digital multimeter and an oscilloscope) to differential output ports and differential input ports of the injection system. Typically injection systems employ differential signal input and output of a 3-coaxial BNC (Bayonet Nut Connector, snap-fit connector), including positive, negative, and ground; the digital multimeter adopts 2-line banana socket input; the oscilloscope uses a coaxial 2-wire BNC input. This requires signal conversion.
In addition, in the calibration process, more than ten different parameters need to be measured, and multiple signal transfer operations need to be performed. Therefore, the operation is complicated, errors are easy, and if wiring errors are caused, instrument equipment can be damaged.
Disclosure of Invention
The invention aims to provide a signal converter which is used for solving the technical problems of complex signal switching operation and instrument damage caused by error in the prior art.
One aspect of the present invention provides a signal converter comprising: a first socket set configured to receive a device under test signal; a relay group including a plurality of relays; a function selection switch configured to enable a corresponding relay in the relay group by selecting a preset switch position; and a second socket set configured to transmit respective device under test signals to a standard instrument via the enabled respective relays to measure respective parameters under test of the device under test.
According to the signal converter provided by the invention, the corresponding relay in the relay group is selected through the function selection switch, so that the signal conversion from the tested equipment to the standard instrument signal can be realized, the measurement switching among various parameters to be tested of the tested equipment can be conveniently carried out, and the instrument damage caused by wiring errors can be avoided.
Drawings
FIG. 1 is a schematic overall outline structure of an embodiment of a signal converter of the present invention;
FIG. 2 is a schematic diagram of the overall assembly of an embodiment of the signal converter of the present invention;
FIG. 3 is a schematic diagram of the circuit board of one embodiment of the signal converter of the present invention;
FIG. 4 is an assembled schematic diagram of a circuit board of one embodiment of a signal converter of the present invention;
fig. 5 is a schematic wiring diagram of a circuit board of one embodiment of a signal converter of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar structures, and thus a detailed description thereof will be omitted.
Embodiments of the present invention provide a signal converter, which may include: a first socket set, the first socket set being configurable to receive a device under test signal; a relay group, which may include a plurality of relays; a function selection switch configurable to enable a respective relay in the relay group by selecting a preset switch position; and a second socket set, the second socket set may be configured to transmit a corresponding device under test signal to a standard instrument via the enabled corresponding relay so as to measure a corresponding parameter under test of the device under test. The function selection switch selects the corresponding relay in the enabling relay group, so that the signal conversion from the tested equipment to the standard instrument signal can be realized, the measurement switching among various parameters to be tested of the tested equipment can be conveniently carried out, and the instrument damage caused by wiring errors can be avoided.
The above signal converter is exemplified in the following with reference to fig. 1-5, in which the device under test is a data bus fault injection test system (hereinafter referred to as an injection system), the signal converter is used for transferring the differential bus signal of the injection system to the input end of standard instruments such as an oscilloscope and a digital multimeter (which may be referred to as a digital meter), and the measurement of various parameters to be tested is exemplified.
It should be noted that the signal converter disclosed in the present invention may be applied to any suitable device under test, and is not limited to the injection system; meanwhile, the standard instrument is not limited to adopting the oscilloscope and the digital multimeter at the same time, for example, in other embodiments, the signal converter may be used only for conversion operation between the injection system and the oscilloscope, or may be used only for conversion operation between the injection system and the digital multimeter, and at this time, the number of relays in the relay group may be reduced and the corresponding relays may be enabled accordingly. In other embodiments, when the device under test changes, the parameter under test may change correspondingly, and similarly, when the parameter under test changes, a suitable standard instrument may be used to measure the parameter under test correspondingly, where the types and ports of the first socket set and the second socket set on the signal converter may change correspondingly.
If the parameters to be measured of the injection system include the positive ground resistance, the negative ground resistance, the positive and negative resistances, the positive and positive resistances, the negative and negative resistances, the first and second pulse amplitudes, the first and second rise times, the first and second duty cycles, the bus delay and the bus rate of the injection system, the signal to be transferred by the signal converter can be referred to in table 1 below.
Table 1 data bus fault injection test system signal to be switched
Table 1 above shows that when measuring different parameters to be measured of the injection system, the signal converter needs to switch the port signals of the corresponding injection system to the ports or channels of the corresponding standard instrument. Wherein H represents a first port of the digital multimeter, and L represents a second port of the digital multimeter; CH1 represents a first channel of an oscilloscope and CH2 represents a second channel of the oscilloscope. The oscilloscope has a mathematical computation function (MATHEMATICS) where CH1-CH2 represents the first channel minus the second channel, i.e., converting the differential signal to a single-ended signal.
In the bus measurement, the default clock frequency indicates the bus rate in Hz.
Fig. 1 is a schematic overall outline structure of an embodiment of a signal converter of the present invention. Fig. 2 is a schematic diagram of the overall assembly of an embodiment of the signal converter of the present invention. Fig. 3 is a schematic diagram of a circuit board of an embodiment of a signal converter of the present invention. Fig. 4 is an assembled schematic diagram of a circuit board of an embodiment of a signal converter of the present invention. Fig. 5 is a schematic wiring diagram of a circuit board of one embodiment of a signal converter of the present invention.
The signal converter provided in this embodiment may include a first socket set 140, a relay set, a function selection switch 130, and a second socket set 160.
Wherein the first jack set 140 may be configured to receive device under test signals.
The relay set may include a plurality of relays, as shown in fig. 5, and is described herein as including six relays a-E.
The function selection switch 130 may be configured to enable the corresponding relay in the relay group by selecting a preset switch position.
The second socket set 160 (see fig. 2) may be configured to signal a respective device under test to a standard instrument via the enabled respective relay to measure a respective parameter under test of the device under test.
In the following embodiments, the device under test is an injection system, and the standard instrument includes a first measuring instrument and a second measuring instrument, and the first measuring instrument is a digital multimeter, and the second measuring instrument is an oscilloscope.
As shown in fig. 1, the signal converter provided in this embodiment may further include an upper cover plate 110, a lower cover plate 120, and an electrical outlet 150.
In the embodiment of the present invention, the first socket set 140, the relay set, the function selecting switch 130, the second socket set 160 and the power socket 150 may all be located on the same circuit board, but the present invention is not limited thereto.
In the embodiment of the present invention, the upper cover plate 110 and the lower cover plate 120 may be fastened as a whole as shown in fig. 1 by, for example, bolts. However, the present invention is not limited thereto, and for example, the signal converter may be configured such that the upper cover plate 110 and the lower cover plate 120 are integrally formed.
In an embodiment of the present invention, the function selection switch 130 may be in the form of a digital disc, and the small holes display the numbers (e.g., 1,2,3,4,5,6,7, 8) of the switch positions. In the following embodiment, taking 8 switch positions corresponding to the function selection switch 130 as an example for explanation, by toggling the function selection switch 130 to different switch positions, the switch line selection action is completed by using the corresponding relay in the relay group, so that the measurement of different parameters to be measured of the injection system can be realized.
In the embodiment of the invention, the tested equipment signal can comprise an input positive signal, an input negative signal, an output positive signal and an output negative signal of the tested equipment. However, the present invention is not limited thereto, and when the device under test changes and/or the parameter to be measured of the device under test changes, the signal of the device under test may be determined according to the actual requirement.
As shown in fig. 2, the upper cover plate 110 may be made of metal. Wherein, the upper cover plate 110 has 1 through hole, and the function selecting switch 130 can be fixed on the upper cover plate 110 through the through hole.
With continued reference to fig. 2, 10 semicircular openings are formed on three sides (front side, rear side and right side in fig. 1) of the upper cover 110, but the present invention is not limited thereto, and for example, 10 or more or less openings may be formed at any suitable position on the upper cover 110.
In an embodiment of the present invention, the first socket set 140 may include 43 coaxial BNC sockets, and the second socket set 160 may include 2 coaxial BNC sockets and 2 banana sockets, but the present invention is not limited thereto. At this time, 10 semicircular openings formed in the upper cover plate 110 may be used for 43 coaxial BNC sockets, 2 coaxial BNC sockets and 2 banana sockets, respectively, on the circuit board, and 1 ground socket and 1 power socket 150 protrude outside the case through the openings.
In an embodiment of the present invention, the inner surface of the upper cover plate 110 may further include 4 nut seats for 4 screws 170 to fasten the upper cover plate 110 and the lower cover plate 120 to form a whole. The present invention is not limited thereto and the upper and lower cover plates 110 and 120 may be fastened in any suitable manner.
In the embodiment of the present invention, a function selection table may be printed on the upper cover plate 110, so as to facilitate the user to use the signal converter. Wherein the function selection table can be seen in table 2 below.
Table 2 functional selector switch position and parameter to be measured comparison table
With continued reference to fig. 2, the lower cover plate 120 may also be made of metal. The 10 semicircular openings of the lower cover plate 120 corresponding to the 10 semicircular openings of the upper cover plate 110 are also 10 semicircular openings, and are in one-to-one correspondence with the 10 semicircular openings of the upper cover plate 110, so that a circular opening is formed together, so that 43 coaxial BNC sockets (first sockets 120), 2 coaxial BNC sockets, 2 banana sockets, 1 grounding socket and 1 power socket on the circuit board extend out of the housing through the circular holes.
It should be noted that the number and shape of the openings formed in the upper cover plate 110 and the lower cover plate 120 may be changed according to the number, type, shape, etc. of the sockets formed in the circuit board, which is not limited in the present invention.
In the embodiment of the present invention, 4 through holes may be further formed on the lower surface of the lower cover plate 120, and the positions of the through holes correspond to the 4 nut seats on the inner surface of the upper cover plate 110 one by one, so that the upper cover plate 110 and the lower cover plate 120 are fastened by the screws to form a whole.
The signal converter provided by the embodiment of the invention adopts a metal totally-enclosed structure, so that external clutter interference can be reduced.
In an exemplary embodiment, the relay group may include first to sixth relays. In the following examples, the first relay is identified by letter a, the second relay is identified by letter B, the third relay is identified by letter D, the fourth relay is identified by letter F, the fifth relay is identified by letter C, and the sixth relay is identified by letter E.
As shown in fig. 3 and 4, the circuit board in the embodiment of the invention may be soldered with the following components: relays a-F (not shown in the figure); a function selection switch 130; 43 coaxial BNC sockets; 2 coaxial BNC sockets; 2 banana sockets; 1 fifth outlet 180 (e.g., a ground outlet) and 1 external power outlet 150.
In the embodiment of the invention, the relays A-F are used as switching devices of signals, and the corresponding relays are powered through the function selection switch 130, so that the signal wiring conversion is completed. And the sockets on the circuit board are respectively used for electrically connecting the tested equipment to receive the tested equipment signals and the standard instrument to transmit the corresponding tested equipment signals to the corresponding standard instrument.
In the embodiment of the invention, the 3-coaxial BNC socket comprises a core wire, wherein a 2-layer outer shielding layer is arranged outside the core wire, the core wire and the 2-layer outer shielding layer form a coaxial structure, the core wire is used for transmitting positive signals, a middle shielding layer of the 2-layer outer shielding layer is used for transmitting negative signals, and the outer shielding layer of the 2-layer outer shielding layer is grounded; the coaxial BNC socket comprises a core wire, wherein a 1-layer outer-wrapping shielding layer is arranged outside the core wire, and the core wire and the 1-layer outer-wrapping shielding layer form a coaxial structure.
In the embodiment shown in fig. 3 and 4, the first socket set 140 may include: a first receptacle 141, which may be configured to electrically connect differential input ports of the device under test to receive input positive and negative signals of the device under test; and a second socket 143, which may be configured to be electrically connected to a differential output port of the device under test to receive an output positive signal and an output negative signal of the device under test.
The first socket set 140 may further include: an eighth receptacle 142 is configured to electrically connect the differential input ports of the device under test to receive the input positive signal and the input negative signal of the device under test. In the embodiment of the present invention, the first socket 141 is configured to receive an input (including an input positive signal and an input negative signal) of the injection system, and the eighth socket 142 is configured to perform input monitoring, where the input monitoring is connected in parallel with the input, and functions identically as a standby. However, in other embodiments, the eighth receptacle 142 may be absent.
The first socket set 140 may further include: a ninth receptacle 144 is configured to electrically connect the differential output ports of the device under test to receive the output positive signal and the output negative signal of the device under test. In the embodiment of the present invention, the second socket 143 is configured to receive the output (including the output positive signal and the output negative signal) of the injection system, and the ninth socket 144 is configured to perform output monitoring, where the output monitoring is connected in parallel with the output, and functions identically as a standby. However, in other embodiments, the ninth receptacle 144 may be absent.
In an embodiment of the present invention, when the device under test is an injection system, the first and second sockets 141 and 142, the eighth socket 142 and the ninth socket 144 may each be 3-coaxial BNC sockets.
In an embodiment of the present invention, the standard instrument may include a second measuring instrument, and the second socket set 160 may include: a sixth socket 161 configurable to electrically connect to a first channel (CH 1) of the second measurement instrument; and a seventh receptacle 162, which may be configured to electrically connect to a second channel (CH 2) of the second measurement instrument.
In an embodiment of the present invention, when the second measuring apparatus is an oscilloscope, the sixth socket 161 and the seventh socket 162 may be coaxial BNC sockets.
In an embodiment of the present invention, the standard instrument may further include a first measuring instrument, and the second socket set 160 may further include: a third socket 163, which may be configured to electrically connect to a first port (H) of the first measurement instrument; and a fourth receptacle 164, which may be configured to electrically connect to a second port (L) of the first measurement instrument.
In an embodiment of the present invention, when the first measuring instrument is a digital multimeter, the third receptacle 163 and the fourth receptacle 164 may each be banana receptacles.
The circuit board may also include a fifth receptacle 180 thereon for use as a ground, which may be configured to transmit a ground signal to a second port (L) of the digital multimeter.
The function of the relay group on the circuit board is described below.
In the embodiment of the invention, 6 relays are arranged on the circuit board, the contact positions of the relays A-F are set according to the following table 3, and the functions of an oscilloscope and a digital multimeter are set, so that the measurement of corresponding parameters to be measured can be completed.
Table 3 comparison table of relay on/off state and parameters to be measured
In Table 3 above, f2-f1 represents the measurement of two channels of the oscilloscope, and the difference between the output signal frequency f2 and the input signal frequency f1 reflects the rate adjustment capability of the injection system.
In an embodiment of the present invention, as shown in tables 4 and 5 below, relays a and B may be used to select either a positive signal or a negative signal of the injection system, relays C and D may be used to select either an input signal or an output signal of the injection system, relay E may be used to transmit the selected signal of the injection system to a digital multimeter or oscilloscope, and relay F may be used to select the L-terminal of the digital multimeter to ground or receive the signal of the injection system.
| Signal under test | Relay A | Relay B |
| Positive signal-positive signal | 1 | 1 |
| Positive signal-negative signal | 1 | 2 |
| Negative signal-positive signal | 2 | 1 |
| Negative signal-negative signal | 2 | 2 |
Table 4 relays a and B select either positive or negative signal to the injection system
Wherein, 1 in Table 4 above represents the positive signal of the selected injection system; 2 represents a negative signal of the selective injection system.
Table 5 relays C and D select either the output signal or the input signal of the injection system
Wherein, 1 in the above table 5 represents the output signal of the selective injection system; 2 represents the input signal to the selection injection system.
In the embodiment of the invention, the signal transfer between the tested equipment and the standard instrument can be completed by stirring the function selection switch to the corresponding switch position and supplying power to the corresponding relay coil.
Table 6 switch position and relay power supply condition table of function selection switch
Fig. 5 is a schematic wiring diagram of a circuit board of one embodiment of a signal converter of the present invention.
In the embodiment of the present invention, when testing each parameter to be tested of the injection system, the internal wiring of the circuit board is shown in fig. 5. After the function selection switch 130 is set as in table 6 above, the signal flows as in table 7 below, completing the wiring.
Table 7 internal node and signal flow table
For example, if the function selection switch 130 is set at switch position 1, the output positive signal of the injection system received by the second socket 143 of the signal converter flows into the H port of the digital multimeter 200 through the 1-1 contact of switch 1 of relay a, the 1 contact of switch C, and the 1-1 contact of switch 1 of relay E; meanwhile, the L port of the digital multimeter 200 is grounded through the 1 contact of the relay F; thereby enabling measurement of the positive ground resistance of the injection system.
For another example, if the function selection switch 130 is set at switch position 2, the output negative signal of the injection system received by the second socket 143 of the signal converter flows into the H port of the digital multimeter 200 through the 1-2 contact of switch 1 of relay a, the 1 contact of switch C, and the 1-1 contact of switch 1 of relay E; meanwhile, the L port of the digital multimeter 200 is grounded through the 1 contact of the switch of the relay F; thereby enabling measurement of the negative ground resistance of the injection system.
For another example, if the function selection switch 130 is set at switch position 3, the output positive signal of the injection system received by the second socket 143 of the signal converter flows into the H port of the digital multimeter 200 through the 1-1 contact of switch 1 of relay a, the 1 contact of switch C, and the 1-1 contact of switch 1 of relay E; meanwhile, the output negative signal of the injection system received by the second socket 143 of the signal converter flows into the L port of the digital multimeter 200 through the contact 1-2 of the switch 1 of the relay B, the contact 1 of the switch of the relay D, the contact 2-1 of the switch 2 of the relay E and the contact 2 of the switch of the relay F; thereby enabling measurement of the positive and negative resistances of the injection system.
For another example, if the function selection switch 130 is set at switch position 4, the output positive signal of the injection system received by the second socket 143 of the signal converter flows into the H port of the digital multimeter 200 through the 1-1 contact of switch 1 of relay a, the 1 contact of switch C, and the 1-1 contact of switch 1 of relay E; meanwhile, the input positive signal of the injection system received by the first socket 141 of the signal converter flows into the L port of the digital multimeter 200 through the 2-1 contact of the switch 2 of the relay B, the 2-1 contact of the switch D, the 2-1 contact of the switch 2 of the relay E, and the 2 contact of the switch F; thereby enabling measurement of the positive electrical resistance of the injection system.
For another example, if the function selection switch 130 is set at switch position 5, the output negative signal of the injection system received by the second socket 143 of the signal converter flows into the H port of the digital multimeter 200 through the 1-2 contact of switch 1 of relay a, the 1 contact of switch C, the 1-1 contact of switch 1 of relay E; meanwhile, the input negative signal of the injection system received by the first socket 141 of the signal converter flows into the L port of the digital multimeter 200 through the 2-2 contact of the switch 2 of the relay B, the 2 contact of the switch 2 of the relay D, the 2-1 contact of the switch 2 of the relay E and the 2 contact of the switch of the relay F; thereby enabling measurement of the negative-negative resistance of the injection system.
For another example, if the function selection switch is set at switch position 6, the output positive signal of the injection system received by the second socket 143 of the signal converter flows into CH1 of oscilloscope 300 through the 1-1 contact of switch 1 of relay a, the 1 contact of switch C and the 1-2 contact of switch 1 of relay E; the output negative signal of the injection system received by the second socket 143 of the signal converter flows into CH2 of the oscilloscope 300 through the 1-2 contact of switch 1 of relay B, the 1 contact of switch D, the 2-2 contact of switch 2 of relay E; thereby enabling measurement of the first pulse amplitude, the first rise time and the first duty cycle of the injection system.
For another example, if the function selection switch is set at switch position 7, the input positive signal of the injection system received by the first socket 141 of the signal converter flows into CH1 of the oscilloscope 300 through the 2-1 contact of switch 2 of relay a, the 2 contact of switch C and the 1-2 contact of switch 1 of relay E; the input negative signal of the injection system received by the first socket 141 of the signal converter flows into CH2 of the oscilloscope 300 through the 2-2 contact of switch 2 of relay B, the 2 contact of switch D, the 2-2 contact of switch 2 of relay E to achieve the measurement of the second pulse amplitude, the second rise time, and the second duty cycle of the injection system.
For another example, if the function selection switch is set at switch position 8, the output positive signal of the injection system received by the second socket 143 of the signal converter flows into CH1 of oscilloscope 300 through the 1-1 contact of switch 1 of relay a, the 1 contact of switch C and the 1-2 contact of switch 1 of relay E; the input positive signal of the injection system received by the first socket 141 of the signal converter flows into the CH2 of the oscilloscope 300 through the 2-1 contact of the switch 2 of the relay B, the 2 contact of the switch of the relay D and the 2-2 contact of the switch 2 of the relay E; thereby enabling measurement of the bus delay and the bus rate of the injection system.
The signal converter illustrated in fig. 1-5 can both accomplish the conversion of the 3-coaxial BNC signal of the injection system into a digital multimeter banana jack format to facilitate digital multimeter measurements; the conversion of the 3-axis BNC signal of the injection system into an axis BNC signal can also be completed, so that oscillometric measurement can be realized; meanwhile, the operation is convenient, and the instrument is not damaged due to wiring errors.
The signal converter adopts the function selection switch to convert various signals between the tested equipment and the standard instrument, and after the wires are connected between the tested equipment and the standard instrument and the signal converter, the calibration wiring of the parameters to be tested corresponding to the tested equipment can be completed only by pulling the function selection switch.
While certain exemplary embodiments of the present invention have been described above by way of illustration, it will be apparent to those skilled in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
Claims (5)
1. A signal converter, comprising:
The first socket group is configured to receive signals of tested equipment, and the tested equipment is a data bus fault injection test system;
A relay group including a plurality of relays;
A function selection switch configured to enable a corresponding relay in the relay group by selecting a preset switch position; and
A second socket set configured to transmit respective device under test signals to a standard instrument via the enabled respective relays to measure respective parameters under test of the device under test,
The tested equipment signal comprises an input positive signal, an input negative signal, an output positive signal and an output negative signal of the tested equipment; wherein the first jack group includes:
a first receptacle configured to electrically connect to a differential input port of the device under test to receive an input positive signal and an input negative signal of the device under test; and
A second receptacle configured to electrically connect the differential output port of the device under test to receive the output positive signal and the output negative signal of the device under test,
The standard instrument includes a first measurement instrument; wherein the second socket group includes:
A third receptacle configured to electrically connect to a first port of the first measurement instrument; and
A fourth receptacle configured to electrically connect to a second port of the first measurement instrument,
The relay group comprises first to fourth relays, the preset switch positions comprise first to fifth switch positions, the parameter to be tested comprises positive ground resistance, negative ground resistance, positive and negative resistance of the device to be tested,
The signal converter further includes:
A fifth receptacle configured to transmit a ground signal to a second port of the first measurement instrument,
The function selecting switch is arranged at the first switch position, the first to fourth relays are turned off, and the output positive signal and the ground signal are transmitted to a first port and a second port of the first measuring instrument to measure the positive ground resistance;
the function selection switch is arranged at the second switch position, the first relay is enabled, and the output negative signal and the ground signal are transmitted to a first port and a second port of the first measuring instrument so as to measure the negative ground resistance;
The function selection switch is arranged at the third switch position, the second relay and the fourth relay are enabled, and the output positive signal and the output negative signal are transmitted to a first port and a second port of the first measuring instrument so as to measure the positive resistance and the negative resistance;
the function selection switch is arranged at the fourth switch position, the third relay and the fourth relay are enabled, and the output positive signal and the input positive signal are transmitted to a first port and a second port of the first measuring instrument so as to measure the positive resistance;
the function selection switch is configured in the case of the fifth switch position, the first relay, the second relay, the third relay, and the fourth relay are enabled, and the output negative signal and the input negative signal are transmitted to a first port and a second port of the first measuring instrument to measure the negative resistance.
2. The signal converter of claim 1, wherein the standard instrument further comprises a second measurement instrument; wherein the second jack group further comprises:
a sixth receptacle configured to electrically connect to the first channel of the second measurement instrument; and
A seventh receptacle configured to electrically connect to a second channel of the second measurement instrument.
3. The signal converter of claim 2, wherein the relay group further comprises fifth and sixth relays, the preset switch positions further comprise sixth through eighth switch positions, and the parameter under test further comprises first and second pulse amplitudes, first and second rise times, first and second duty cycles, bus delay, and bus rate.
4. A signal converter according to claim 3, wherein,
The function selection switch is set in the sixth switch position, the second relay and the sixth relay are enabled, the output positive signal and the output negative signal are transmitted to a first channel and the second channel of the second measuring instrument to measure the first pulse amplitude, the first rise time, and the first duty ratio;
The function selection switch is set in the seventh switch position, the second relay, the third relay, the fifth relay, and the sixth relay are enabled, the input positive signal and the input negative signal are transmitted to a first channel and the second channel of the second measuring instrument to measure the second pulse amplitude, the second rise time, and the second duty ratio;
The function selection switch is configured in the eighth switch position, the third relay and the sixth relay are enabled, and the output positive signal and the input positive signal are transmitted to the first channel and the second channel of the second measuring instrument to measure the bus delay and the bus rate.
5. The signal converter of any of claims 1-4, further comprising an upper cover plate, a lower cover plate, and an electrical outlet, wherein the first outlet set, the relay set, the function selection switch, the second outlet set, and the electrical outlet are all disposed on a same circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537333.6A CN108847837B (en) | 2018-05-29 | 2018-05-29 | Signal Converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202256597U (en) * | 2011-08-29 | 2012-05-30 | 深圳深爱半导体股份有限公司 | Box for testing parameters of metal oxide semiconductor field effect tube |
| CN203133582U (en) * | 2013-02-16 | 2013-08-14 | 郑州光力科技股份有限公司 | Intrinsically-safe multifunctional signal converter |
| CN204117360U (en) * | 2014-07-29 | 2015-01-21 | 江苏本能科技有限公司 | Radio-frequency (RF) identification trigger pip converter |
| KR20160041530A (en) * | 2014-10-08 | 2016-04-18 | 한국전력공사 | Apparatus and method for remote monitoring and control of protection relay |
| CN207074997U (en) * | 2017-05-11 | 2018-03-06 | 兖矿东华重工有限公司 | A kind of mine digital signal adapter |
| CN208257784U (en) * | 2018-05-29 | 2018-12-18 | 广州赛宝计量检测中心服务有限公司 | Signal adapter |
-
2018
- 2018-05-29 CN CN201810537333.6A patent/CN108847837B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202256597U (en) * | 2011-08-29 | 2012-05-30 | 深圳深爱半导体股份有限公司 | Box for testing parameters of metal oxide semiconductor field effect tube |
| CN203133582U (en) * | 2013-02-16 | 2013-08-14 | 郑州光力科技股份有限公司 | Intrinsically-safe multifunctional signal converter |
| CN204117360U (en) * | 2014-07-29 | 2015-01-21 | 江苏本能科技有限公司 | Radio-frequency (RF) identification trigger pip converter |
| KR20160041530A (en) * | 2014-10-08 | 2016-04-18 | 한국전력공사 | Apparatus and method for remote monitoring and control of protection relay |
| CN207074997U (en) * | 2017-05-11 | 2018-03-06 | 兖矿东华重工有限公司 | A kind of mine digital signal adapter |
| CN208257784U (en) * | 2018-05-29 | 2018-12-18 | 广州赛宝计量检测中心服务有限公司 | Signal adapter |
Non-Patent Citations (1)
| Title |
|---|
| 郭永贞.《模拟电路实验与EDA技术》.东南大学出版社,2011,第151-160页. * |
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