JPH05288844A - Correlation detection-type searching apparatus and correlation-type signal detection apparatus - Google Patents

Abstract

PURPOSE:To obtain a detection signal whose S/N ratio is good by means of a correlation detection processing operation whose constitution is simple regarding a detection apparatus wherein a correlation with a promised waveform is utilized. CONSTITUTION:A transmission waveform circuit 21 generates a promised waveform such as a monocyclic pulse or the like at each fixed-cycle trigger signal 1A; transmitted electromagnetic waves 4 corresponding to it are radiated toward an underground buried object 7A via a transmitting antenna 3. Reflected electromagnetic waves R from the underground buried object 7A are input to a multiplication circuit 11 as a receiver signal 10A via a receiving antenna 9 and an amplifier 10. A variable delay circuit 12 generate a delayed signal 12A which is delayed cumulatively by a unit delay amount. A correlation signal circuit 13 outputs the same waveform as the promised waveform at each delay signal 12A by shifting the wave by the unit delay amount; it outputs it as a correlated signal 13A. A multiplication circuit 11 multiplies the correlated signal 13A by the received signal 10A; a multiplied signal is integrated 14; an integrated signal 14A is sampled at a prescribed part of the correlated signal 13A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a required signal from received signals by a correlation detection type detection device which obtains a required detection signal by performing correlation using a promised waveform at the time of transmission, and a similar configuration. The present invention relates to a correlation type signal detection device.

[0002]

2. Description of the Related Art This type of detection device includes a reflection type detection device and a transmission type detection device. As a reflection type detection device, land conditions, ship navigation conditions, relative distance conditions, etc. are reflected by electromagnetic waves. For example, a radar for a ship that detects a situation such as a radar for a ship or a radar for an underground survey that detects a situation of buried objects under the surface of the earth, a situation of formation change, a situation of a relative distance, etc. There are fish detectors and sonars that detect distance conditions, etc., and transmission-type detection devices use the transmitted waves of electromagnetic waves (also called passing waves) to detect the status of buried objects and strata changes in underground paths between required points. There is a transmission / reception counter-detection sonar that detects the status of underwater objects / airborne objects using transmitted waves of sound waves and ultrasonic waves, such as transmission / reception opposed detection radar and borehole radar.

Further, in this type of detecting apparatus, as an apparatus provided with a correlation function for increasing the detecting ability, that is, as a correlation detecting type detecting apparatus, a plurality of received signals obtained in each detecting cycle are superposed. A structure that takes a correlation is used.

This configuration is based on the signals R1, R2 and R3 shown in FIG.
As described above, the signal CR1 is obtained by taking a correlation such that a plurality of reception signals of each detection period T obtained by transmitting the single pulse transmission signal X1 are superposed and logically summed or averaged. In addition, the reception signals S1 and S2 commonly existing at the same phase point of each detection cycle T are detected as detection signals.

In addition to the above, as a means for providing the correlation function, for example, a communication signal transmitted from a communication device or a monitoring device, or an information signal in which a monitoring signal in a facility is multiplexed is repeated at a predetermined cycle. Correlation-type signal detection apparatus configured to obtain a required detection signal by correlating with a correlation signal having a promised waveform for each time of its cycle, which is a signal including a waveform signal Can be considered.

[0006] In order to make such correlation effective, as a transmission waveform, a stepped amplitude format, a uniform waveform repeating format, etc. with specific promises for amplitude variation, frequency variation, phase variation, number of pulses, pulse interval, etc. In the former, the stepwise amplitude type is the one in which the amplitude is changed in a stepwise manner, and in the latter, the equal waveform repeating type is a sinusoidal half-wave pulse or rectangular pulse. Or a predetermined number of lines arranged in both positive and negative directions, and the simplest waveform is a single 1 as shown in FIG.
Cycle (in the present invention, called a monocycle),
There is a unipolar pulse corresponding to a single 1/2 cycle as shown in FIG. 7B.

The reason for providing the correlation function in the detection device is mainly to remove interference and environmental noise from a weak received signal with bad S / N so as to obtain a detected signal with good S / N, and Even if the power peak value is small, the detection distance can be increased. Similarly, even if the power peak value of the transmission signal is small, the pulse compression technology has a function to increase the detection distance. Yes, the configuration of pulse compression using waveforms such as staircase frequency modulation format, linear frequency modulation format, code phase modulation format, code carrier modulation format, etc. was published in June 1979 by the Institute of Electronics and Communication Engineers "Electronic Communication Series-Radar. Technology (No. 2) "and the like.

Here, the stepwise frequency modulation type is as follows:
As shown in the waveform (a) of FIG. 6, the frequency is changed as f1, f2, f3, f4, and f5 for each small unit time Ta, and the linear frequency modulation type is shown in FIG.
As in the waveform (a), the frequency is temporally changed.

In the code phase modulation type, as shown in the waveform (c) of FIG. 6, each one cycle signal having a constant period Tb is used as one unit pulse signal, and each one unit pulse signal is used. The phase starting from the 0 ° position is set to “+” and the phase starting from the 180 ° position is set to “−”, and the code carrier modulation format is referred to as the waveform of FIG. 6), the frequencies f1 to f5 of the signal in the stepwise frequency modulation type are changed to carrier signals of the same frequency, and the carrier wave at each unit time Ta is changed to
Each unit pulse is encoded in the same manner as the pulse of one unit in the code phase modulation type of the waveform (c) of FIG.

It goes without saying that the waveforms in each of these forms can be used as the promised waveform for the above correlation function. In the present invention, the promised waveform is
It refers to the waveform in each of these formats.

[0011]

In the correlation structure in which a plurality of cycles are overlapped and a logical sum or an average is taken as shown in FIG. 8 as described above, even if the transmission waveform is a complicated promise waveform, the period T However, if the signals exist at the same location, that is, at the same phase point, they will be detected regardless of whether they are noise signals or interference signals.

Therefore, there is a problem in that it is desired to provide a simple and inexpensive structure that does not have such inconvenience.

[0013]

According to the present invention, a received signal of a reflected wave or a transmitted wave obtained by transmitting a transmission signal of a promise waveform that repeats at a predetermined cycle as described above is required to be correlated with the promise waveform. In the correlation detection type detection device for obtaining the detection signal of or the correlation type signal detection device for obtaining the required detection signal by correlating the received signal including the signal of the promise waveform repeated at the required period with the promise waveform, Each time, the promised waveform is sequentially delayed by a small amount of time, a delayed promised waveform signal is obtained as a correlation signal, and a small amount of delayed correlation signal means is obtained by multiplying the received signal as a correlated signal by the correlation signal at each cycle. The above problem can be solved by providing a multiplication means for obtaining the detection signal based on the multiplication signal obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described below with reference to FIG. The embodiment shown in FIG. 1 is a one-cycle waveform as shown in FIG. 7A, that is, a monocycle waveform as the simplest promise waveform in an underground survey radar for exploring the ground from the air. The signal of each part is shown in FIG.

The fixed period circuit 1 is a time generation circuit, for example, a circuit for counting a predetermined amount of unit time pulses to obtain a periodic signal, and transmits a pulse signal having a fixed period T as a fixed period signal 1A. It is given to the circuit 2 and the variable delay circuit 12.

The transmission circuit 2 supplies a transmission antenna 2A with a monocycle signal generated by the transmission waveform generation circuit 21 using the fixed period signal 1A as a trigger signal and having a power required by the power amplification circuit 22. In other words, the transmission signal is given in which the waveform of the time length TP is the promised waveform in the monocycle. Therefore, detection is performed with the fixed cycle T as the detection cycle.

The transmitting antenna 3 is a dipole antenna,
For example, a fan-shaped dipole antenna, which is mounted on a research aircraft or the like, transmits a transmission signal 2A and transmits a transmission electromagnetic wave 4
Then, it is transmitted from the air to the ground 6 through the ground surface 5, and the reflected electromagnetic wave 8 from the underground buried objects 7A, 7B, and 7C is received by the receiving antenna 9. The receiving antenna 9 is, for example, a fan-shaped dipole antenna similar to the transmitting antenna, and supplies the received signal 9A based on the reflected electromagnetic wave 8 to the amplifier circuit 10.

The amplifier circuit 10 is a high-frequency amplifier circuit, which sets the received signal 9A to a desired amplitude value, and the received signal 10A by a signal as shown in FIG. It is given as a multiplication input. Received signal 10
Signals 10a, 10b, and 10c in A are reception signals obtained corresponding to the reflected electromagnetic waves from the underground buried objects 7A, 7B, and 7C, respectively.

The variable delay circuit 12 is a circuit for generating a delay pulse with a variable amount of time obtained by adding a unit amount of delay time each time an input signal is applied. For example, a counting circuit and a clock circuit are combined. Is a pulse generator circuit that stores the count value of the fixed cycle signal 1A and transmits the count value n of the count circuit that resets the count and repeats counting again when the count value CM reaches a predetermined count value CM. A time length obtained by accumulating clocks whose unit delay time Δt is a time length in which the time length TP of the signal 2A is 1 / m, for example, 1/10, that is, Δt × A pulse signal delayed from the fixed cycle signal 1A with n being a delay amount TD is given to the correlation signal circuit 13 as a delay signal 12A.

Then, the initial value and the final value of the value of n are set in advance so that the delay amount TD corresponds to the range to be detected within the fixed period T, and the initial value and the final value of n are reset and returned to the initial value. The counting is repeated.

The correlation signal circuit 13 is the same pulse generation circuit as the transmission circuit 2, and uses the delayed signal 12A as a trigger signal, and has the same waveform as the promised waveform signal such as the correlation signal 13A, that is, a fixed cycle. Delay amount TD from signal 1A
A monocycle signal at a time point delayed by this is produced and given as a multiplication input on the other side of the multiplication circuit 11. Therefore, when viewed from the phase of the fixed cycle T, the correlation signal 13A is phase-shifted by the unit delay time Δt in each fixed cycle.

The multiplication circuit 11 is an analog multiplication circuit, for example, a multiplication circuit by a double balance mixer (DBM) (also called a double balance type multiplication circuit),
The multiplication value obtained by multiplying the amplitude value of the multiplication input on one side and the amplitude value of the multiplication input on the other side, that is, by multiplying the amplitude value of the reception signal 10A and the amplitude value of the correlation signal 13A in an analog manner. The integration circuit 14 uses the signal of the amplitude value as the multiplication signal 11A.
Give to.

The integrating circuit 14 is a time constant type integrating circuit, and has a time constant larger than, for example, the time length TP of the correlation signal 13A (this time length is the same as the time length of the transmission signal 2A). The integration circuit is for obtaining an amplitude value corresponding to a value obtained by integrating multiplication amplitude values sequentially obtained during multiplication in the multiplication circuit.

The sample holding circuit 15 is an analog type sample holding circuit, and samples a portion of the integrated amplitude value in each fixed cycle of the integrated signal 14A, for example, at the end of the time length TP of the correlation signal 13A. By holding the analog value held by sampling until the next sampling time, a signal such as the detection signal 15A in FIG. 2 is given to the display circuit 16 as a signal subjected to correlation detection processing.

Therefore, while the detection signal 15A is changed by the amplitude of the integrated value of the signal multiplied for each correlation signal 13A in each fixed cycle T, the fixed cycle T is n.
When the number of times has passed, the signal portion of the required range defined by the count value n of the received signal 10A is detected as a correlated signal by multiplying and correlating with the correlation signal 13A. The signal is extended to a time length n times as long.

When the selection of the predetermined range by the count value n is set so as to cover the entire fixed period T, the fixed period T
When the detection is repeated a number of times k divided by the unit delay time Δt, the received signal 10A has a waveform in which all correlation detection has been completed, and the time length T × k during this time is compressed to 1 / k for viewing. Then, a signal such as the detection signal 15A (shortening rate 1 / k) in FIG. 2 is output as the detection signal 15A. When the promised waveform is a waveform applicable to pulse compression, the signal obtained as the detection signal 15A appears as a kind of pulse-compressed signal.

The display circuit 16 displays the detection signal 15A as a detection image. For example, the detection signal 15A is sequentially stored in the memory for one display screen of the display by raster scanning, and the stored contents are stored. This is a circuit for displaying in a B scope shape while reading in synchronization with raster scanning. The detection signal 15A in a fixed cycle T × k is used as a brightness modulation signal in main scanning, and it is sequentially shifted in the sub-scanning direction for each detection signal 15A. Is displayed.

In the case of a device having the above-mentioned configuration by the transmission / reception opposed detection, for example, in the case of a detection device for performing underground exploration by a transmitted wave as shown in FIG. The correlation signal 13A having the promised waveform obtained by the variable delay circuit 12 and the correlation signal circuit 13 provided in any of the transmission side circuit section 50, the reception side circuit section 60, and the control / display circuit section 70 is executed. Receiver side circuit unit 60
Alternatively, the above multiplication circuit 1 provided in the control / display circuit unit 70
If it is configured so as to be given to No. 1, the target detection signal can be obtained by performing the same correlation detection processing as the correlation detection type detection apparatus in FIG.

Further, in the case of the above correlation type signal detection device, the received signal to be subjected to correlation detection, that is, the correlated signal is given to the above multiplication circuit 11 instead of the received signal 10A, and the above variable delay is also applied. Circuit 12 and correlation signal circuit 1
If a circuit similar to that of FIG. 3 is used to generate a correlation signal having a target promise waveform, and the correlation signal is supplied to the multiplying circuit 11 instead of the correlation signal 13A, the correlation detection / detection device in FIG. The target detection signal can be obtained by performing the same correlation detection processing as the correlation detection processing in.

As described above, the correlation detection processing according to the configuration of the first embodiment of FIG. 1 has a configuration in which the period of the received signal to be the correlated signal is a fixed period and the period of the correlation signal is variably delayed. You can see it.

Next, as a second embodiment, a configuration in which the period of the correlation signal is fixed and the period of the received signal to be the correlated signal is variably delayed will be described with reference to FIGS. In FIGS. 3 and 4, the functional parts and the signal waveforms denoted by the same reference numerals as those in FIGS. 1 and 2 are the same or corresponding functional parts and the signal waveforms described in FIGS. 1 and 2. Is.

In the case of the second embodiment, the variable delay circuit 12
In the above configuration, the initial value of the delay amount TD by Δt × n is set to the maximum delay amount Δt × m, and Δt ×
(M-1), Δt × (m-2), Δt × (m-3) ...
As described above, by configuring the delay amount TD to be gradually reduced, the temporal relative relationship between the reception signal 10A and the correlation signal 13A in the configuration of FIG. 1 can be made to have a similar time series.

It goes without saying that the correlation detection structure similar to that of the second embodiment can be applied to the above-mentioned structure by the transmission / reception opposite detection or the above correlation type signal detection device.

In the case of the second embodiment, the delay amount TD by Δt × n is set to Δt × 1, Δt × 2, Δ in the same way as in the configuration of the variable delay circuit 12 of FIG. t × 3 ……
In the case of using a configuration in which the received signal 10A and the correlation signal 13A to be correlated signals are reversed in time, the detection signal 15A is reversed in time series. It will appear as an arrayed signal. Therefore, it is necessary to provide the means for changing the raster scanning in the display circuit 16 so as to reversely scan it and restore it to a regular time series, or to change the detection distance direction of the display image to the direction opposite to that in FIG. There is.

Further, in the case where the reversely arranged signals are obtained, the time series is similarly reversed in the case of the above-mentioned structure by the transmission / reception counter-detection or in the case of the above correlation type signal detecting device. It is needless to say that the present invention can be applied by providing a means for orienting and dealing with it.

[Modified Implementation] The present invention can be modified and implemented as follows.

(1) A waveform in which a promised waveform is specifically promised with respect to the amplitude change, frequency change, phase change, number of pulses, pulse interval, etc. described in the section of the prior art, for example, stepwise amplitude form, etc. It is configured by using a waveform such as a waveform repeating format or any of waveforms such as a stepped frequency modulation format, a linear frequency modulation format, a code phase modulation format, and a code carrier modulation format.

(2) A pulse wave obtained by modulating the signal of the promised waveform into a rectangular shape of a single high frequency used in a general radar or a fish finder, that is, the f1 portion of the waveform of (a) in FIG. Make only the waveform.

(3) An amount obtained by adding the fixed period T to the initial value of the delay amount TD of the variable delay circuit 12, that is, T + Δt × n in the case of the first embodiment and in the case of the second embodiment. Is T + △
It is configured to start from t × m. To add this addition amount, the delay amount of the variable delay circuit 12 is added to the second signal of the fixed period signal 1A obtained from the fixed period circuit 1.

(4) The addition amount in the above (3) is set to N × T which is a plurality of N times the fixed period T, and N × T + Δt × n in the case of the first embodiment, and the second embodiment. In case of N × T +
It is configured to start from Δt × m. In this case, 3 of the fixed period signal 1A obtained from the fixed period circuit 1
The delay amount of the variable delay circuit 12 is added to the subsequent signals.

(5) At the start of the delay amount TD of the variable delay circuit 12, by adding an arbitrary fixed delay amount equal to or less than the fixed period T to the initial value of the delay amount, the so-called detection range shift is performed. In addition, the correlation detection processing is performed from a time point corresponding to the target detection target, for example, the underground buried object 7B, and for example, the detection signal 15A for the underground buried objects 7B and 7C is obtained.

(6) The variable delay circuit 12 is a coaxial cable
It is configured to obtain a plurality of delay amounts by a piezoelectric conversion element, a distributed constant circuit, etc., and each delay amount is switched to obtain a variable delay amount.

(7) The promise waveform of the correlation signal 13A is transformed while the promise waveform of the transmission signal 2A itself passes through the paths of the transmitting antenna 3, the transmitting electromagnetic wave 4, the ground, the reflected electromagnetic wave 8 and the receiving antenna 9. The correlation signal circuit 13 is configured to have a waveform close to that of the model, or a circuit between the correlation signal circuit 13 and the multiplication circuit 11 that corresponds to the waveform close to this model, for example, a resonance circuit having a low Q. And a combination of a phase shift circuit and so on.

(8) The integrating circuit 14 is an operational type integrating circuit, and the sampling time of the sample holding circuit 15 is set to the fixed cycle signal 1A. In this case, needless to say, it is necessary to reset the calculation after sampling.

(9) In the above configuration (8), a digital value obtained by A / D converting the amplitude value obtained at each sampling time is stored in a memory or shift register or other storage circuit, and the address or shift is performed at each sampling time. Are sequentially moved to and stored in the following order, and the detection signal 15A is configured to obtain the detection signal 15A based on the digital value read out at the clock of a predetermined constant speed, so that the waveform distortion of the detection signal 15A due to the deviation of the sampling point Be able to fix it. Further, when the detection signal or the detection signal is obtained in the reverse time series described above, the stored contents are read out in the reverse order to obtain the signal in the normal time series.

(10) The detection signal 15A is obtained by eliminating the integrating circuit 14 and filtering the multiplication signal 11A by the low-pass filtering circuit. In this case, it is desirable to configure the filter circuit to pass a frequency corresponding to the fixed period T, that is, a frequency of about (1 / T) Hz or less.

(11) The amount of the small amount of time Δt is configured in another analog form, for example, by changing the unit clip level for the time to the clip level point of the rising or falling ramp wave.

(12) Form of promised waveform and small time Δ
The quantity of t or either of them is constituted by a signal in digital form, for example a serial pulse signal or a parallel pulse representing a binary value.

(13) Form of promised waveform and small amount of time Δ
The amount of t or any one of them is converted into an analog signal, which is converted into a digital signal for correlation.

(14) Form of promised waveform and small time Δ
The amount of t or any one of them is converted into a digital signal, which is then converted into an analog signal for correlation.

(15) Received signal 10A / correlation signal 12A
Is digitized by A / D conversion, and the fixed period circuit 1, the multiplication circuit 11, the integration circuit 14, the sample holding circuit 15 and the like are processed by a digital computer, for example, a microcomputer.

(16) An adjusting circuit for ensuring the multiplication function by variably adjusting the amplitude of both the received signal 10A and the correlation signal 13A input to the multiplying circuit 11 or one of the circuits. , A variable attenuation circuit is provided.

(17) When the frequency of the transmission signal 2A, that is, the promise signal is low, the multiplication circuit 11 is configured by a combination of operational amplifier circuits, for example, a multiplication IC.

[0054]

According to the present invention, in the case of the detection apparatus, the received signal is set as the correlated signal at each detection cycle,
With the configuration in which the signal of the promised waveform delayed by a small amount of time is used as the correlation signal, the detection signal subjected to the correlation detection processing can be obtained, so that a signal not depending on the promised waveform is not detected and the correlation detection processing is performed. At the same time, since the pulse compression processing can be performed, it is possible to perform reflection detection and transmission detection by the pulse-compressed detection signal having a good S / N.

Also in the case of the signal detecting device, the input signal is the correlated signal and the signal of the promised waveform is the correlation signal.
Similarly, it is possible to obtain a detection signal with a good S / N obtained by performing the correlation detection processing and the pulse compression processing at the same time simply by modifying the multiplication circuit.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 2 is an operation waveform diagram of essential parts of the first embodiment of the present invention.

FIG. 3 is a block configuration diagram of a second embodiment of the present invention.

FIG. 4 is an operation waveform diagram of essential parts of a second embodiment of the present invention.

FIG. 5 is a block diagram of a modification of the present invention.

FIG. 6 is a signal waveform diagram of a main part of a conventional technique.

FIG. 7 is a signal waveform diagram of essential parts of a conventional technique.

FIG. 8 is a signal waveform diagram of essential parts of a conventional technique.

[Explanation of symbols]

 1 Detecting Periodic Circuit 1A Detecting Periodic Signal 2 Transmitting Circuit 21 Transmitting Waveform Circuit 22 Power Amplifying Circuit 2A Transmitting Signal 3 Transmitting Antenna 4 Transmitting Electromagnetic Wave 5 Ground Surface 6 Underground 7A, 7B, 7C Underground Object 8 Reflected Electromagnetic Wave 9 Receiving Antenna 9A Received signal 10 Amplification circuit 10A Received signal 11 Multiplication circuit 11A Multiplication signal 12 Variable delay circuit 12A Delay signal 13 Correlation signal circuit 13A Correlation signal 14 Integration circuit 14A Integration signal 15 Sample holding circuit 15A Detection signal 16 Display circuit 50 Transmission side circuit section 60 receiving side circuit section 70 control / display circuit section 100 underground radar

Claims (8)

[Claims] 1. A correlation detection type detection for obtaining a required detection signal by correlating a received signal of a reflected wave or a transmitted wave obtained by transmitting a transmission signal of a promise waveform repeated at a predetermined cycle with the promise waveform. The device is a device for transmitting a fixed period transmitting means for transmitting the transmission signal with the period being a constant period, and a delayed promise waveform signal obtained by sequentially delaying the promise waveform by a small amount of time for each time of the period as a correlation signal. Variable delay correlation signal means for obtaining, and a multiplication means for obtaining the detection signal based on a multiplication signal obtained by multiplying the received signal as a correlated signal by the correlation signal for each period, Correlation detection type detection device. 2. A correlation detection type detection device for obtaining a required detection signal by correlating a reception signal of a reflected wave or a transmission wave obtained by transmitting a transmission signal of a promise waveform repeated at a predetermined cycle with the promise waveform. There is a fixed period correlation signal means for obtaining the signal of the promised waveform as a correlation signal for each time with the period being a constant period, and the transmission signal is transmitted by sequentially delaying the period by a small amount of time for each time. Variable delay transmitting means, and multiplying means for obtaining the detection signal based on a multiplication signal obtained by multiplying the received signal as a correlated signal by the correlation signal for each cycle. Correlation detection type detection device. 3. The correlation detection type detection device according to claim 1, further comprising the multiplication means for performing the multiplication by an analog value. 4. The correlation detection type detection device according to claim 1 or 2, further comprising the multiplication means for performing the multiplication by a digital value. 5. A correlation type signal detection device for obtaining a required detection signal by correlating a received signal including a signal of a promise waveform which repeats at a required period with the promise waveform, wherein the period is a fixed period. A constant period receiving means for obtaining the received signal, a variable delay correlation signal means for obtaining a delayed promise waveform signal obtained by sequentially delaying the promise waveform by a small amount of time at each time of the period as a correlation signal, and the received signal A correlation type signal detection device comprising: a multiplication unit that obtains the detection signal based on a multiplication signal obtained by multiplying the correlation signal for each period as the correlated signal. 6. A correlation type signal detection device for obtaining a required detection signal by correlating a received signal including a signal of a promise waveform which repeats at a required period with the promise waveform, wherein the period is a fixed period. A fixed period correlation signal means for obtaining the signal of the promised waveform as a correlation signal for each time, a variable delay receiving means for obtaining the received signal by sequentially delaying the period by a small amount of time for each time, and the received signal A correlation type signal detection device comprising: a multiplication unit that obtains the detection signal based on a multiplication signal obtained by multiplying the correlation signal for each period as the correlated signal. 7. The correlation detection type detection device according to claim 5, further comprising the multiplication means for performing the multiplication by an analog value. 8. The correlation type signal detection device according to claim 5, comprising the multiplication means for performing the multiplication by a digital value.