Portable multiplication period signal generator

Abstract

The present invention discloses a portable multiplication period signal generating device, comprising a signal generating device, the signal generating device comprising a signal generating body and a signal control board, the signal generating body having a built-in multiplication period signal generating module, the multiplication period signal generating module comprising a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit, the current period generating circuit being electrically connected between the exponential voltage generating circuit and the pulse period generating circuit, the exponential voltage generating circuit being used to generate an exponential voltage, the exponential voltage outputting a pulse period signal through the pulse period generating circuit, and the exponential voltage outputting an exponential current through the current period generating circuit. The portable multiplication period signal generating device of the present invention can realize the generation of a pulse period signal only through a pure hardware circuit, thereby improving the reliability of the signal generating device test.

Description

Technical Field

[0001] The present invention relates to the field of nuclear measurement technology, and in particular to a device for portable testing of an out-of-core nuclear measurement instrument system and realizing performance detection of periodic signals of an out-of-core nuclear measurement instrument system in a nuclear power plant. Background Art

[0002] The extra-core nuclear measuring instrument system is one of the important systems directly related to reactor safety. One of the important functions of the extra-core nuclear measuring instrument system is to calculate the doubling period of the reactor nuclear power. The calculation result of the doubling period can indicate the rising or falling speed of the reactor nuclear power. If the rising speed is too fast, it will affect the safe operation of the reactor.

[0003] At present, the design of the ex-core nuclear measurement instrument system generally calculates the doubling period of the reactor nuclear power by the pulse signal collected by the source range detector measurement channel, or the current signal collected by the intermediate range detector measurement channel. Since the pulse signal and current signal actually output by the detector of the current ex-core nuclear measurement instrument are extremely weak and need to meet the requirement of periodic signal doubling, therefore, in the development process of the ex-core nuclear measurement instrument system, there is a lack of effective test equipment to simulate the pulse or current doubling signal output by the detector, which cannot meet the requirements of on-site rapid verification of the doubling period calculation function of the ex-core nuclear measurement instrument system.

[0004] In addition, the prior art also designs some periodic signal generators, through which the period of the nuclear measuring instrument outside the reactor is calculated. For example, Chinese Patent No. 201310488859.7 discloses a reactor periodic signal generator and its implementation method and use method. The patent includes a microcontroller, the I / O port of the microcontroller is connected to a control button, the A / D conversion port of the microcontroller is connected to a potentiometer knob, the microcontroller is connected to an external memory, the output end of the external memory is connected to a DA conversion chip, the output port of the DA conversion chip is respectively connected to an analog switch, a V / F conversion chip, and a resistor, and a voltage signal is directly outputted at the same time. Although it can meet the calibration needs of the reactor nuclear measuring instrument periodic measurement at this stage, the reactor periodic signal generator also has some shortcomings:

[0005] (1) It requires the use of microprocessors, single-chip microcomputers or FPGA designs, which results in complex peripheral circuit construction, high device costs, long software development cycles and high maintenance costs.

[0006] (2) The human-computer interaction method uses a display screen, which has high device cost, large device size and low portability.

[0007] (3) There is a lack of processing of the pulse period signal after V / F conversion, and the actual output signal of the detector is not further simulated. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a portable multiplication period signal generating device, which can realize the generation of pulse period signals through a pure hardware circuit, avoid errors that may be introduced by software design, and improve the reliability of the test device.

[0009] In order to solve the above technical problems, the present invention provides a portable multiplication period signal generating device, including a signal generating device, the signal generating device including a signal generating body and a signal control board, the signal control board is arranged at the front end of the signal generating body, the signal generating body is built with a multiplication period signal generating module, the multiplication period signal generating module includes a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit, the period gear control circuit, the exponential voltage generating circuit, and the pulse period generating circuit are electrically connected in sequence, the current period generating circuit is electrically connected between the exponential voltage generating circuit and the pulse period generating circuit, the signal control board is electrically connected to the period gear control circuit, the exponential voltage generating circuit is used to generate an exponential voltage, the exponential voltage outputs a pulse period signal through the pulse period generating circuit, and the exponential voltage outputs an exponential current through the current period generating circuit.

[0010] According to one embodiment of the portable multiplication period signal generating device of the present invention, a period shift button and a plurality of period indication gears are provided on the signal control panel, and each period indication gear is spaced apart and distributed above the period shift button. The period gear control circuit is electrically connected to the period shift button and the period indication gear. Each time the period shift button is pressed, the period gear control circuit controls the period indication gear to be displayed, and the exponential voltage generating circuit generates an exponential voltage corresponding to the displayed period indication gear.

[0011] According to one embodiment of the portable multiplication period signal generating device of the present invention, the pulse period generating circuit includes a V / F conversion circuit, a monostable circuit, and an attenuation circuit. The V / F conversion circuit, the monostable circuit, and the attenuation circuit are electrically connected. The V / F conversion circuit converts the input voltage into a pulse signal. The monostable circuit converts the pulse signal output by the V / F conversion circuit into a signal with a constant pulse width to simulate the pulse width of the pulse signal output by the detector. The attenuation circuit reduces the amplitude of the output pulse signal.

[0012] According to an embodiment of the portable multiplication period signal generating device of the present invention, the V / F conversion circuit includes a voltage-frequency conversion chip U3, an input resistor R IN , timing capacitor C OS , logic resistor R9, integral capacitor C INT, wherein the voltage-frequency conversion chip U3 has its -VIN pin connected to the input voltage, and the input resistor R IN and the -VIN pin of the voltage-frequency conversion chip U3. The timing capacitor C OS One end of the integral capacitor C is electrically connected to the C1 pin of the voltage-frequency conversion chip U3. INT One end and the input resistor R IN Electrical connection, the integrating capacitor C INT The other end is connected to the V out pin, one end of the logic resistor R9 is connected to the VGND pin of the voltage-frequency conversion chip U3, and the other end of the logic resistor R9 is connected to the F out The V / F conversion circuit converts the F of the voltage-frequency conversion chip U3 by out Pin output pulse frequency F out The pulse frequency F output by the V / F conversion circuit is out F out =V IN / 7.5·C os R IN , where C OS is the timing capacitor C OS The capacitance value, R IN is the input resistance R IN The resistance value of the V / F conversion circuit outputs a pulse frequency F out It is proportional to the input voltage VIN.

[0013] According to an embodiment of the portable multiplication period signal generating device of the present invention, the monostable circuit includes a monostable multivibrator U4, an external capacitor Cext, and an external resistor RP2, wherein the external resistor RP2 is connected between the RCext pin and the Vcc pin of the monostable multivibrator U4, the external capacitor Cext is connected between the Vcc pin and the Cext pin of the monostable multivibrator U4, the A pin of the monostable multivibrator U4 is grounded, the B pin of the monostable multivibrator U4 is connected to the F pin of the voltage-frequency conversion chip U3, and the Vcc pin of the voltage-frequency conversion chip U3 is connected to the B pin of the monostable multivibrator U4. out The pins are electrically connected, and the pulse width of the pulse signal output by the monostable circuit simulation detector is obtained by converting the voltage to frequency through the F out The pulse frequency output by the pin triggers the input of the B pin of the monostable multivibrator U4 and receives the Pin output, the pulse width change of the pulse signal is achieved by adjusting the capacitance value of the external capacitor Cext and the resistance value of the external resistor RP2 in the monostable circuit.

[0014] According to an embodiment of the portable multiplication period signal generating device of the present invention, the current period generating circuit includes a voltage follower U5, an input resistor R Vin , output resistance R out , feedback resistor R F , the input resistance R Vin and connected to the non-inverting input terminal of the voltage follower U5, the feedback resistor R F One end of the feedback resistor R is connected to the inverting input terminal of the voltage follower U5. F The other end of is connected to the output end of the voltage follower U5 to form a feedback loop. The exponential voltage generated by the exponential voltage generating circuit is input from the non-inverting input end of the voltage follower U5. The output end of the voltage follower U5 and the output resistor R out The exponential voltage passes through the voltage follower U5 and the output resistor R at its output end. out Then the output exponential current.

[0015] According to one embodiment of the portable multiplication period signal generating device of the present invention, the several period indication gears include a first period indication gear, a second period indication gear, a third period indication gear, and a fourth period indication gear. The first period indication gear is 10.5s, the second period indication gear is 12.6s, the third period indication gear is 44.0s, and the fourth period indication gear is 110.0s.

[0016] According to an embodiment of the portable multiplication period signal generating device of the present invention, the periodic gear control circuit includes a synchronous counter U1, a decoder U2, a first relay K1, a second relay K2, a third relay K3, and a fourth relay K4. The CLK pin of the synchronous counter U1 receives the input of the shift signal. The pins Q0 and Q1 of the synchronous counter U1 are electrically connected to the pins A and B of the decoder U2, respectively. Each time the periodic shift button is pressed, a clock rising edge of a shift signal is generated to trigger the CLK pin of the synchronous counter U1 so that the pins Q0 and Q1 of the synchronous counter U1 output counts from 00 to 11, continuously. Cyclic addition of 1, the signals output by pins Q0 and Q1 of the synchronous counter U1 are converted by the decoder U2 and output from pins X0, X1, X2 and X3 of the decoder U2, the signals output by pins X0, X1, X2 and X3 of the decoder U2 correspond to the periodic indication gear selected by pressing the periodic shift button, the pins X0, X1, X2 and X3 of the decoder U2 are jumpered with the first relay K1, the second relay K2, the third relay K3 and the fourth relay K4 respectively, the signal output by each pin of the decoder U2 drives each corresponding jumpered relay.

[0017] According to an embodiment of the portable multiplication period signal generating device of the present invention, a group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the first light-emitting diode LED1, the second light-emitting diode LED2, the third light-emitting diode LED3, and the fourth light-emitting diode LED4, and another group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the resistors R5, R6, R7, and R8, and when the period shift button is pressed to select the first period indication gear, the X0 pin of the decoder U2 corresponding to the first period indication gear will output a signal to drive the corresponding first relay K1 to operate, and the first light-emitting diode LED1 on the first relay K1 will be lit to realize the display of the currently selected first period indication gear, and the period gear control circuit is electrically connected to the exponential voltage generating circuit through the resistors R5, R6, R7, and R8.

[0018] According to one embodiment of the portable multiplication period signal generating device of the present invention, the exponential voltage generating circuit includes an integrator Uc, a gear resistor R3, an output resistor R1, an integrating capacitor C, a proportional amplifier U0, and a feedback resistor R2, the gear resistor R3 is connected to the inverting input terminal of the integrator Uc, the output resistor R1 is connected to the output terminal of the integrator Uc, one end of the integrating capacitor C is connected to the inverting input terminal of the integrator Uc, the other end of the integrating capacitor C is connected to the output terminal of the integrator Uc, the output terminal of the integrator Uc is electrically connected to the proportional amplifier U0 through the output resistor R1, one end of the feedback resistor R2 is connected to the inverting input terminal of the proportional amplifier U0, the other end of the feedback resistor R2 is connected to the output terminal of the proportional amplifier U0, the output of the integrator Uc is connected to the input terminal of the integrator Uc in the form of negative feedback after passing through the proportional amplifier U0, so that an exponential voltage is generated at the output terminal of the integrator Uc.

[0019] According to one embodiment of the portable multiplication period signal generating device of the present invention, the relationship between the exponential multiplication period Td of the exponential voltage generated by the exponential voltage generating circuit and the gear resistance R3 required for the corresponding gear is: Among them, Td is the exponential multiplication period, R3 is the feedback resistance value of the gear resistor R3, C is the capacitance value of the integral capacitor C, k is the amplification factor of the proportional amplifier U0, R1 is the resistance value of the output resistor R1, and R2 is the resistance value of the feedback resistor R2.

[0020] Compared with the prior art, the portable multiplication period signal generating device of the present invention has at least the following technical effects:

[0021] (1) The signal generating device of the present invention comprises a signal generating body and a signal control board. The signal control board is arranged at the front end of the signal generating body. A multiplication period signal generating module is built into the signal generating body. The present invention builds the multiplication period signal generating module into the signal generating body, thereby saving the space occupied by the device and eliminating the need for a human-computer interactive display screen. The device is simplified, the signal generating device is convenient to carry, and has the characteristics of small size and light weight.

[0022] (2) The multiplication period signal generating module of the present invention comprises a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit. The period gear control circuit, the exponential voltage generating circuit, and the pulse period generating circuit are electrically connected. The current period generating circuit is electrically connected between the exponential voltage generating circuit and the pulse period generating circuit. The signal control board is electrically connected to the period gear control circuit. The exponential voltage generating circuit is used to generate an exponential voltage. The exponential voltage generated is output as a pulse period signal through the pulse period generating circuit. The exponential voltage is output as an exponential current through the current period generating circuit. A period shift button and a plurality of period indicators are provided on the signal control board. The gear position of each cycle indication is spaced apart from each other above the cycle shift button, the cycle gear position control circuit is electrically connected to the cycle shift button and the cycle indication gear position, each time the cycle shift button is pressed, the cycle gear position control circuit controls the cycle indication gear position to be displayed, and the exponential voltage generating circuit generates an exponential voltage corresponding to the displayed cycle indication gear position. The present invention can realize the generation of pulse periodic signals only through pure hardware circuit implementation, thus avoiding errors that may be introduced by software design, improving the reliability of the signal generating device test, and greatly reducing the equipment cost and improving the economy through streamlined design and eliminating the need to use expensive and complex components such as microprocessor chips and display screens.

[0023] (3) The pulse period generating circuit of the present invention comprises a V / F conversion circuit, a monostable circuit and an attenuation circuit. The V / F conversion circuit, the monostable circuit and the attenuation circuit are electrically connected in sequence. The input voltage signal is converted into a pulse signal by the V / F conversion circuit. The pulse signal output by the V / F conversion circuit can be converted into a signal with a constant pulse width by the monostable circuit, thereby simulating the pulse width of the pulse signal output by the detector. The amplitude of the output pulse signal is then reduced by the attenuation circuit. Not only a pulse period signal is generated, but also the generated pulse period signal is processed to further simulate the pulse signal actually output by the detector, thereby meeting the test and verification requirements for the multiplication period calculation function in the out-of-core nuclear measuring instrument system, and also improving the response capability of rapid testing at the engineering site. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The portable multiplication period signal generating device of the present invention and its technical effects are described in detail below in conjunction with the accompanying drawings and embodiments, wherein:

[0025] Figure 1 It is a schematic structural diagram of a portable multiplication period signal generating device of the present invention;

[0026] Figure 2 It is a numerical display diagram of the period indication gear position of the signal control board in the portable multiplication period signal generating device of the present invention;

[0027] Figure 3 It is a circuit module diagram of a power supply circuit module and a multiplication period signal generating circuit module in the portable multiplication period signal generating device of the present invention;

[0028] Figure 4 It is a principle diagram of a periodic gear control circuit in a portable multiplication periodic signal generating device of the present invention;

[0029] Figure 5 It is a schematic diagram of an exponential voltage generating circuit in a portable multiplication period signal generating device of the present invention;

[0030] Figure 6 It is a principle diagram of a pulse period generating circuit in a portable multiplication period signal generating device of the present invention;

[0031] Figure 7 It is a principle diagram of a current period generating circuit in a portable multiplication period signal generating device of the present invention.

[0032] In the figure, there are a signal generating body 1, a signal control board 2, a periodic shift button 21, a first periodic gear indicating position 22, a second periodic gear indicating position 23, a third periodic gear indicating position 24, a fourth periodic gear indicating position 25, a verification test output terminal 26, and a start reset button 27. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1-2As shown, the present invention provides a portable multiplication period signal generating device, including a signal generating device, the signal generating device including a signal generating body 1 and a signal control board 2, the signal control board 2 is arranged at the front end of the signal generating body 1, a period shift button 21 and four period indication gears are arranged on the signal control board 2, each period indication gear is distributed above the period shift button 21 at intervals, a verification test output terminal 26 and a start reset button 27 are also arranged on the signal control board 2, the signal generating device of the present invention adopts a closed structural design, the shell of the signal generating device adopts a metal shell, which is conducive to shielding and anti-interference, the present invention integrates the multiplication period signal generating module into the signal generating body 1, saves the occupied space of the equipment, does not need to adopt a display screen for human-computer interaction, simplifies the equipment, facilitates the carrying of the signal generating device, and has the characteristics of small size and light weight.

[0035] like Figure 3 As shown, the present invention has a power supply circuit module and a multiplication period signal generating module built into the signal generating body 1, the power supply circuit module and the multiplication period signal generating module are electrically connected, and the multiplication period signal generating module is powered by the power supply circuit module. The power supply circuit module of the present invention adopts a DC-DC chip, and can achieve dual output voltage regulation of ±15V or ±5V. In specific implementation, the DC-DC chip of the present invention receives a 12V DC voltage, which is converted into a ±15V DC voltage and a ±5V DC voltage through the DC-DC chip, and the ±15V DC voltage and the ±5V DC voltage are used to power the multiplication period signal generating circuit module.

[0036] like Figure 3As shown, the multiplication period signal generating module of the present invention is mainly composed of a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit. The period gear control circuit, the exponential voltage generating circuit, and the pulse period generating circuit are electrically connected in sequence, the current period generating circuit is electrically connected between the exponential voltage generating circuit and the pulse period generating circuit, and the signal control board is electrically connected to the period gear control circuit. The exponential voltage generating circuit of the present invention is used to generate an exponential voltage. The exponential voltage generated by the pulse period generating circuit will output a pulse period signal. The exponential voltage generated by the current period generating circuit will output an exponential current. The period gear control circuit of the present invention is connected to the period shift button 21 and the period indicator The gear positions are electrically connected. Each time the periodic shift button 21 is pressed, the periodic gear position control circuit controls the periodic indication gear position to be displayed. The exponential voltage generating circuit generates an exponential voltage corresponding to the displayed periodic indication gear position, and outputs a pulse periodic signal through the pulse period generating circuit. The exponential voltage generated by the exponential voltage generating circuit flows through the current period generating circuit, and the current period generating circuit outputs an exponential current. The present invention only needs to be implemented through a pure hardware circuit to realize the generation of a pulse periodic signal, thus avoiding errors that may be introduced by software design, improving the reliability of the signal generating device test, and through streamlined design, eliminating the need to use expensive and complex microprocessor chips, display screens and other components, greatly reducing equipment costs and improving economy.

[0037] like Figure 2 As shown, there are four cycle indication gears on the signal control board 2, namely the first cycle indication gear 22, the second cycle indication gear 23, the third cycle indication gear 24, and the fourth cycle indication gear 25, wherein the first cycle indication gear 22 is 10.5s, the second cycle indication gear 23 is 12.6s, the third cycle indication gear 24 is 44.0s, and the fourth cycle indication gear 25 is 110.0s.

[0038] like Figure 4As shown, the periodic gear control circuit of the present invention includes a synchronous counter U1, a decoder U2, a first relay K1, a second relay K2, a third relay K3, and a fourth relay K4. The decoder U2 is a BCD decoder. The present invention receives the input of the shift signal through the CLK pin of the synchronous counter U1. The pin Q0 and the pin Q1 of the synchronous counter U1 are electrically connected to the pin A and the pin B of the decoder U2 respectively. Each time the periodic shift button 21 is pressed, a clock rising edge of the shift signal is generated. The clock rising edge is used to trigger the CLK pin of the synchronous counter U1, so that the pins Q0 and Q1 of the synchronous counter U1 output signals and count from 00 to 11. , continuously cyclically adding 1, the signals output by pins Q0 and Q1 of the synchronous counter U1 of the present invention are converted by the decoder U2 and output from the X0 pin, X1 pin, X2 pin, and X3 pin of the decoder U2, and the signals output by the decoder U2 from its X0 pin, X1 pin, X2 pin, and X3 pin correspond to the periodic indication gear selected by pressing the periodic shift button 21, wherein the X0 pin, X1 pin, X2 pin, and X3 pin of the decoder U2 are respectively jumpered with the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4, therefore, the signal output by each pin of the decoder U2 will drive each corresponding jumpered relay.

[0039] In a specific implementation, a group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 of the present invention are respectively connected to the first light-emitting diode LED1, the second light-emitting diode LED2, the third light-emitting diode LED3, and the fourth light-emitting diode LED4, and another group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the resistors R5, R6, R7, and R8. When the periodic shift button 21 is pressed and the first periodic indicating gear position 22 is selected, the first periodic indicating gear position 22 corresponds to The X0 pin of the decoder U2 will output a signal to drive the corresponding first relay K1 to operate, and the first light-emitting diode LED1 on the first relay K1 will be lit to realize the display of the currently selected first cycle indication gear position 22; when the cycle shift button 21 is pressed again and the second cycle indication gear position 23 is selected, the X1 pin of the decoder U2 corresponding to the second cycle indication gear position 23 will output a signal to drive the corresponding second relay K2 to operate, and the second light-emitting diode LED2 on the second relay K2 will be lit, thereby realizing the display of the second cycle indication gear position 23 selected by the cycle shift button 21.

[0040] In specific implementation, the cycle gear control circuit of the present invention is connected to the exponential voltage generating circuit through the resistors R5, R6, R7, and R8 connected to the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4, so as to realize the electrical connection between the cycle gear control circuit and the exponential voltage generating circuit. Therefore, when the cycle shift button 21 is pressed, it corresponds to one of the four cycle indicating gears, and the relay on the cycle gear control circuit will be actuated, and the light emitting diode connected to the relay will be lit, so as to realize the display of the cycle indicating gear, and the resistor connected to the relay is connected to the exponential voltage generating circuit, so the exponential voltage corresponding to the cycle indicating gear will be generated.

[0041] In a specific implementation of the present invention, the multiplication period signal generating module also includes a starting circuit, which is electrically connected to the exponential voltage generating circuit. The starting circuit is used to control the starting reset button 27. When the starting reset button 27 is pressed, the starting circuit controls the exponential voltage generating circuit to work.

[0042] like Figure 5 As shown, the exponential voltage generating circuit includes an integrator Uc, a gear resistor R3, an output resistor R1, an integrating capacitor C, a proportional amplifier U0, and a feedback resistor R2. The gear resistor R3 is connected to the inverting input terminal of the integrator Uc, the output resistor R1 is connected to the output terminal of the integrator Uc, one end of the integrating capacitor C is connected to the inverting input terminal of the integrator Uc, the other end of the integrating capacitor C is connected to the output terminal of the integrator Uc, the output terminal of the integrator Uc is electrically connected to the proportional amplifier U0 through the output resistor R1, one end of the feedback resistor R2 is connected to the inverting input terminal of the proportional amplifier U0, the other end of the feedback resistor R2 is connected to the output terminal of the proportional amplifier U0, and the output of the integrator Uc is connected to the input terminal of the integrator Uc in the form of negative feedback after passing through the proportional amplifier U0, so that the output terminal of the integrator Uc can generate an exponential voltage.

[0043] Specifically, by Figure 6 It can be known that the specific period of the exponential voltage generated by the exponential voltage generating circuit is determined according to the change of the feedback resistance value of the gear resistor R3, wherein I C is the current flowing through the output resistor R1, IR2 is the current flowing through the feedback resistor R2, Uc is the voltage output by the integrator Uc, Td is the exponential multiplication period, R3 is the feedback resistance value of the gear resistor R3, C is the capacitance value of the integral capacitor C, k is the amplification factor of the proportional amplifier U0, R1 is the resistance value of the output resistor R1, and R2 is the resistance value of the feedback resistor R2:

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050] Td is the exponential multiplication period. Substituting the value of the periodic indication gear designed by the signal generator into the following formula, the feedback resistance value R3 required for the corresponding gear can be obtained:

[0051]

[0052] At the same time, the exponential voltage generated by the exponential voltage generating circuit is led out to the verification test output terminal 26 of the signal control board 2 through hard wiring, so as to facilitate automatic verification of the function of the signal generating device after assembly.

[0053] When the present invention is specifically implemented, Figure 5 As shown, the pulse period generating circuit includes a V / F conversion circuit, a monostable circuit, and an attenuation circuit. The V / F conversion circuit, the monostable circuit, and the attenuation circuit are electrically connected. The V / F conversion circuit converts the input voltage into a pulse signal. The monostable circuit converts the pulse signal output by the V / F conversion circuit into a signal with a constant pulse width to simulate the pulse width of the pulse signal output by the detector. The attenuation circuit reduces the amplitude of the output pulse signal.

[0054] When the present invention is implemented, the V / F conversion circuit includes a voltage-frequency conversion chip U3, an input resistor R IN , timing capacitor C OS , logic resistor R9, integral capacitor C INT The model of the voltage-frequency conversion chip U3 is AD650, the -VIN pin of the voltage-frequency conversion chip U3 is connected to the input voltage, and the input resistor R IN The timing capacitor C OS One end of the voltage-frequency conversion chip U3 is electrically connected to the C1 pin, and the integral capacitor C INT One end and the input resistor R IN Electrical connection, integrating capacitor C INT The other end is connected to the V out pin, one end of the logic resistor R9 is connected to the VGND pin of the voltage-frequency conversion chip U3, and the other end of the logic resistor R9 is connected to the F outThe pins are electrically connected, and the V / F conversion circuit converts the F of the voltage-frequency conversion chip U3 out Pin output pulse frequency F out , the pulse frequency F output by the V / F conversion circuit out F out =V IN / 7.5·C os R IN , where C OS is the timing capacitor C OS The capacitance value, R IN is the input resistance R IN The resistance value, the pulse frequency F output by the V / F conversion circuit out It is proportional to the input voltage VIN.

[0055] When the present invention is specifically implemented, the monostable circuit includes a monostable multivibrator U4, an external capacitor Cext, and an external resistor RP2. The model of the monostable multivibrator U4 is 54LS123. The external resistor RP2 is connected between the RCext pin and the Vcc pin of the monostable multivibrator U4. The external capacitor Cext is connected between the Vcc pin and the Cext pin of the monostable multivibrator U4. The A pin of the monostable multivibrator U4 is grounded. The B pin of the monostable multivibrator U4 is connected to the F pin of the voltage-frequency conversion chip U3. out The pins are electrically connected, and the pulse width of the pulse signal output by the monostable circuit simulation detector is obtained through the F of the voltage-frequency conversion chip U3. out The pulse frequency output by the pin is used to trigger the input end of the B pin of the monostable multivibrator U4. Since the pulse signal output by the detector is a negative pulse, it is necessary to select the inverting output pin on the monostable multivibrator U4, that is, pin as output, through the monostable multivibrator U4 The pin outputs a pulse signal, and the change of the pulse width of the pulse signal is achieved by adjusting the capacitance value of the external capacitor Cext and the resistance value of the external resistor RP2 in the monostable circuit.

[0056] When the present invention is specifically implemented, Figure 7 As shown, the current cycle generating circuit includes a voltage follower U5, an input resistor R Vin , output resistance R out , feedback resistor R F , the input resistance R Vin and the non-inverting input terminal of the voltage follower U5, and the feedback resistor R F One end of the feedback resistor R FThe other end is connected to the output end of the voltage follower U5 to form a feedback loop. The exponential voltage generated by the exponential voltage generating circuit is input from the non-inverting input end of the voltage follower U5. The output end of the voltage follower U5 and the output resistor R out The exponential voltage passes through the voltage follower U5 and the output resistor R at its output out Then the output exponential current.

[0057] The above disclosures are only several preferred embodiments of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A portable multiplication period signal generating device, comprising a signal generating device, characterized in that: The signal generating device includes a signal generating body and a signal control board. The signal control board is arranged at the front end of the signal generating body. The signal generating body is equipped with a multiplication period signal generating module. The multiplication period signal generating module includes a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit. The period gear control circuit, the exponential voltage generating circuit, and the pulse period generating circuit are electrically connected in sequence. The current period generating circuit is electrically connected between the exponential voltage generating circuit and the pulse period generating circuit. The signal control board is electrically connected to the period gear control circuit. The exponential voltage generating circuit is used to generate an exponential voltage. The exponential voltage outputs a pulse period signal through the pulse period generating circuit. The exponential voltage outputs an exponential current through the current period generating circuit.

2. The portable multiplication period signal generating device according to claim 1, characterized in that: The signal control panel is provided with a periodic shift button and a plurality of periodic indicating gears, each periodic indicating gear is spaced apart and distributed above the periodic shift button, the periodic gear control circuit is electrically connected to the periodic shift button and the periodic indicating gear, and each time the periodic shift button is pressed, the periodic gear control circuit controls the periodic indicating gear to be displayed, and the exponential voltage generating circuit generates an exponential voltage corresponding to the displayed periodic indicating gear.

3. The portable multiplication period signal generating device according to claim 1, characterized in that: The pulse period generating circuit includes a V / F conversion circuit, a monostable circuit, and an attenuation circuit. The V / F conversion circuit, the monostable circuit, and the attenuation circuit are electrically connected. The V / F conversion circuit converts the input voltage into a pulse signal. The monostable circuit converts the pulse signal output by the V / F conversion circuit into a signal with a constant pulse width to simulate the pulse width of the pulse signal output by the detector. The attenuation circuit reduces the amplitude of the output pulse signal.

4. The portable multiplication period signal generating device according to claim 3, characterized in that: The V / F conversion circuit includes a voltage-frequency conversion chip U3, an input resistor RIN, a timing capacitor C OS , logic resistor R9, integral capacitor CINT, wherein the -VIN pin of the voltage-frequency conversion chip U3 is connected to the input voltage, the input resistor RIN is electrically connected to the -VIN pin of the voltage-frequency conversion chip U3, and the timing capacitor C OS One end of the integral capacitor CINT is electrically connected to the C1 pin of the voltage-frequency conversion chip U3, one end of the integral capacitor CINT is electrically connected to the input resistor RIN, and the integral capacitor C INT The other end of the logic resistor R9 is connected to the Vout pin of the voltage-frequency conversion chip U3, one end of the logic resistor R9 is connected to the VGND pin of the voltage-frequency conversion chip U3, and the other end of the logic resistor R9 is connected to the F out The V / F conversion circuit converts the F of the voltage-frequency conversion chip U3 by out Pin output pulse frequency F out The pulse frequency F output by the V / F conversion circuit is out F out =V IN / 7.5·C os R IN , where C OS is the timing capacitor C OS The capacitance value, R IN is the input resistance R IN The resistance value of the V / F conversion circuit outputs a pulse frequency F out It is proportional to the input voltage VIN.

5. The portable multiplication period signal generating device according to claim 3, characterized in that: The monostable circuit includes a monostable multivibrator U4, an external capacitor Cext, and an external resistor RP2. The external resistor RP2 is connected between the RCext pin and the Vcc pin of the monostable multivibrator U4. The external capacitor Cext is connected between the Vcc pin and the Cext pin of the monostable multivibrator U4. The A pin of the monostable multivibrator U4 is grounded. The B pin of the monostable multivibrator U4 is connected to the F pin of the voltage-frequency conversion chip U3. out The pins are electrically connected, and the pulse width of the pulse signal output by the monostable circuit simulation detector is obtained by converting the voltage to frequency through the F out The pulse frequency output by the pin triggers the input of the B pin of the monostable multivibrator U4 and receives the Pin output, the pulse width change of the pulse signal is achieved by adjusting the capacitance value of the external capacitor Cext and the resistance value of the external resistor RP2 in the monostable circuit.

6. The portable multiplication period signal generating device according to claim 1, characterized in that: The current cycle generating circuit includes a voltage follower U5, an input resistor RVin, an output resistor Rout, a feedback resistor R F , the input resistance R Vin and connected to the non-inverting input terminal of the voltage follower U5. The feedback resistor R F One end of the feedback resistor RF is connected to the inverting input end of the voltage follower U5, and the other end of the feedback resistor RF is connected to the output end of the voltage follower U5 to form a feedback loop. The exponential voltage generated by the exponential voltage generating circuit is input from the non-inverting input end of the voltage follower U5, and the output end of the voltage follower U5 is connected to the output resistor Rout. The exponential voltage passes through the voltage follower U5 and the output resistor Rout at its output end. out Then the output exponential current.

7. The portable multiplication period signal generating device according to claim 2, characterized in that: The several cycle indication gears include a first cycle indication gear, a second cycle indication gear, a third cycle indication gear, and a fourth cycle indication gear. The first cycle indication gear is 10.5s, the second cycle indication gear is 12.6s, the third cycle indication gear is 44.0s, and the fourth cycle indication gear is 110.0s.

8. The portable multiplication period signal generating device according to claim 7, characterized in that: The periodic gear control circuit includes a synchronous counter U1, a decoder U2, a first relay K1, a second relay K2, a third relay K3, and a fourth relay K4. The CLK pin of the synchronous counter U1 receives the input of the shift signal. The pins Q0 and Q1 of the synchronous counter U1 are electrically connected to the pins A and B of the decoder U2, respectively. Each time the periodic shift button is pressed, a clock rising edge of a shift signal is generated to trigger the CLK pin of the synchronous counter U1, so that the pins Q0 and Q1 of the synchronous counter U1 output counts from 00 to 11, and continuously increases by 1. The synchronous counter U1 The signals output from pins Q0 and Q1 of the decoder 1 are converted by the decoder U2 and output from the X0 pin, X1 pin, X2 pin and X3 pin of the decoder U2. The signals output from the X0 pin, X1 pin, X2 pin and X3 pin of the decoder U2 correspond to the periodic indication gear selected by pressing the periodic shift button. The X0 pin, X1 pin, X2 pin and X3 pin of the decoder U2 are respectively jumpered with the first relay K1, the second relay K2, the third relay K3 and the fourth relay K4. The signal output from each pin of the decoder U2 drives each corresponding jumpered relay.

9. The portable multiplication period signal generating device according to claim 8, characterized in that: A group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the first light-emitting diode LED1, the second light-emitting diode LED2, the third light-emitting diode LED3, and the fourth light-emitting diode LED4; another group of contacts of the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the resistors R5, R6, R7, and R8; when the periodic shift button is pressed to select the first periodic indication gear position, the X0 pin of the decoder U2 corresponding to the first periodic indication gear position will output a signal to drive the corresponding first relay K1 to operate, and the first light-emitting diode LED1 on the first relay K1 will be lit to realize the display of the currently selected first periodic indication gear position; the periodic gear position control circuit is electrically connected to the exponential voltage generating circuit through the resistors R5, R6, R7, and R8.

10. The portable multiplication period signal generating device according to claim 1, characterized in that: The exponential voltage generating circuit includes an integrator Uc, a gear resistor R3, an output resistor R1, an integrating capacitor C, a proportional amplifier U0, and a feedback resistor R2. The gear resistor R3 is connected to the inverting input terminal of the integrator Uc, the output resistor R1 is connected to the output terminal of the integrator Uc, one end of the integrating capacitor C is connected to the inverting input terminal of the integrator Uc, the other end of the integrating capacitor C is connected to the output terminal of the integrator Uc, the output terminal of the integrator Uc is electrically connected to the proportional amplifier U0 through the output resistor R1, one end of the feedback resistor R2 is connected to the inverting input terminal of the proportional amplifier U0, the other end of the feedback resistor R2 is connected to the output terminal of the proportional amplifier U0, and the output of the integrator Uc is connected to the input terminal of the integrator Uc in the form of negative feedback after passing through the proportional amplifier U0, so that an exponential voltage is generated at the output terminal of the integrator Uc.

11. The portable multiplication period signal generating device according to claim 10, characterized in that: The relationship between the exponential multiplication period Td of the exponential voltage generated by the exponential voltage generating circuit and the gear resistance R3 required for the corresponding gear is: Among them, Td is the exponential multiplication period, R3 is the feedback resistance value of the gear resistor R3, C is the capacitance value of the integral capacitor C, k is the amplification factor of the proportional amplifier U0, R1 is the resistance value of the output resistor R1, and R2 is the resistance value of the feedback resistor R2.

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